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1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32#include <linux/ctype.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/export.h>
36#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
38#include <drm/drm_edid.h>
39#include <drm/drm_fourcc.h>
40#include <drm/drm_modeset_lock.h>
41#include <drm/drm_atomic.h>
42
43#include "drm_crtc_internal.h"
44#include "drm_internal.h"
45
46static struct drm_framebuffer *
47internal_framebuffer_create(struct drm_device *dev,
48 const struct drm_mode_fb_cmd2 *r,
49 struct drm_file *file_priv);
50
51/* Avoid boilerplate. I'm tired of typing. */
52#define DRM_ENUM_NAME_FN(fnname, list) \
53 const char *fnname(int val) \
54 { \
55 int i; \
56 for (i = 0; i < ARRAY_SIZE(list); i++) { \
57 if (list[i].type == val) \
58 return list[i].name; \
59 } \
60 return "(unknown)"; \
61 }
62
63/*
64 * Global properties
65 */
66static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
67 { DRM_MODE_DPMS_ON, "On" },
68 { DRM_MODE_DPMS_STANDBY, "Standby" },
69 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
70 { DRM_MODE_DPMS_OFF, "Off" }
71};
72
73DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
74
75static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
77 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
78 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
79};
80
81/*
82 * Optional properties
83 */
84static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
85 { DRM_MODE_SCALE_NONE, "None" },
86 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
87 { DRM_MODE_SCALE_CENTER, "Center" },
88 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
89};
90
91static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
95};
96
97/*
98 * Non-global properties, but "required" for certain connectors.
99 */
100static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
104};
105
106DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
107
108static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
112};
113
114DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
115 drm_dvi_i_subconnector_enum_list)
116
117static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
123};
124
125DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
126
127static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
133};
134
135DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
136 drm_tv_subconnector_enum_list)
137
138static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
139 { DRM_MODE_DIRTY_OFF, "Off" },
140 { DRM_MODE_DIRTY_ON, "On" },
141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
142};
143
144struct drm_conn_prop_enum_list {
145 int type;
146 const char *name;
147 struct ida ida;
148};
149
150/*
151 * Connector and encoder types.
152 */
153static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
155 { DRM_MODE_CONNECTOR_VGA, "VGA" },
156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
159 { DRM_MODE_CONNECTOR_Composite, "Composite" },
160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
162 { DRM_MODE_CONNECTOR_Component, "Component" },
163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
167 { DRM_MODE_CONNECTOR_TV, "TV" },
168 { DRM_MODE_CONNECTOR_eDP, "eDP" },
169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
170 { DRM_MODE_CONNECTOR_DSI, "DSI" },
171};
172
173static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
174 { DRM_MODE_ENCODER_NONE, "None" },
175 { DRM_MODE_ENCODER_DAC, "DAC" },
176 { DRM_MODE_ENCODER_TMDS, "TMDS" },
177 { DRM_MODE_ENCODER_LVDS, "LVDS" },
178 { DRM_MODE_ENCODER_TVDAC, "TV" },
179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
180 { DRM_MODE_ENCODER_DSI, "DSI" },
181 { DRM_MODE_ENCODER_DPMST, "DP MST" },
182};
183
184static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
185 { SubPixelUnknown, "Unknown" },
186 { SubPixelHorizontalRGB, "Horizontal RGB" },
187 { SubPixelHorizontalBGR, "Horizontal BGR" },
188 { SubPixelVerticalRGB, "Vertical RGB" },
189 { SubPixelVerticalBGR, "Vertical BGR" },
190 { SubPixelNone, "None" },
191};
192
193void drm_connector_ida_init(void)
194{
195 int i;
196
197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
198 ida_init(&drm_connector_enum_list[i].ida);
199}
200
201void drm_connector_ida_destroy(void)
202{
203 int i;
204
205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
206 ida_destroy(&drm_connector_enum_list[i].ida);
207}
208
209/**
210 * drm_get_connector_status_name - return a string for connector status
211 * @status: connector status to compute name of
212 *
213 * In contrast to the other drm_get_*_name functions this one here returns a
214 * const pointer and hence is threadsafe.
215 */
216const char *drm_get_connector_status_name(enum drm_connector_status status)
217{
218 if (status == connector_status_connected)
219 return "connected";
220 else if (status == connector_status_disconnected)
221 return "disconnected";
222 else
223 return "unknown";
224}
225EXPORT_SYMBOL(drm_get_connector_status_name);
226
227/**
228 * drm_get_subpixel_order_name - return a string for a given subpixel enum
229 * @order: enum of subpixel_order
230 *
231 * Note you could abuse this and return something out of bounds, but that
232 * would be a caller error. No unscrubbed user data should make it here.
233 */
234const char *drm_get_subpixel_order_name(enum subpixel_order order)
235{
236 return drm_subpixel_enum_list[order].name;
237}
238EXPORT_SYMBOL(drm_get_subpixel_order_name);
239
240static char printable_char(int c)
241{
242 return isascii(c) && isprint(c) ? c : '?';
243}
244
245/**
246 * drm_get_format_name - return a string for drm fourcc format
247 * @format: format to compute name of
248 *
249 * Note that the buffer used by this function is globally shared and owned by
250 * the function itself.
251 *
252 * FIXME: This isn't really multithreading safe.
253 */
254const char *drm_get_format_name(uint32_t format)
255{
256 static char buf[32];
257
258 snprintf(buf, sizeof(buf),
259 "%c%c%c%c %s-endian (0x%08x)",
260 printable_char(format & 0xff),
261 printable_char((format >> 8) & 0xff),
262 printable_char((format >> 16) & 0xff),
263 printable_char((format >> 24) & 0x7f),
264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
265 format);
266
267 return buf;
268}
269EXPORT_SYMBOL(drm_get_format_name);
270
271/*
272 * Internal function to assign a slot in the object idr and optionally
273 * register the object into the idr.
274 */
275static int drm_mode_object_get_reg(struct drm_device *dev,
276 struct drm_mode_object *obj,
277 uint32_t obj_type,
278 bool register_obj)
279{
280 int ret;
281
282 mutex_lock(&dev->mode_config.idr_mutex);
283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
284 if (ret >= 0) {
285 /*
286 * Set up the object linking under the protection of the idr
287 * lock so that other users can't see inconsistent state.
288 */
289 obj->id = ret;
290 obj->type = obj_type;
291 }
292 mutex_unlock(&dev->mode_config.idr_mutex);
293
294 return ret < 0 ? ret : 0;
295}
296
297/**
298 * drm_mode_object_get - allocate a new modeset identifier
299 * @dev: DRM device
300 * @obj: object pointer, used to generate unique ID
301 * @obj_type: object type
302 *
303 * Create a unique identifier based on @ptr in @dev's identifier space. Used
304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
305 * modeset identifiers are _not_ reference counted. Hence don't use this for
306 * reference counted modeset objects like framebuffers.
307 *
308 * Returns:
309 * Zero on success, error code on failure.
310 */
311int drm_mode_object_get(struct drm_device *dev,
312 struct drm_mode_object *obj, uint32_t obj_type)
313{
314 return drm_mode_object_get_reg(dev, obj, obj_type, true);
315}
316
317static void drm_mode_object_register(struct drm_device *dev,
318 struct drm_mode_object *obj)
319{
320 mutex_lock(&dev->mode_config.idr_mutex);
321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
322 mutex_unlock(&dev->mode_config.idr_mutex);
323}
324
325/**
326 * drm_mode_object_put - free a modeset identifer
327 * @dev: DRM device
328 * @object: object to free
329 *
330 * Free @id from @dev's unique identifier pool. Note that despite the _get
331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
332 * for reference counted modeset objects like framebuffers.
333 */
334void drm_mode_object_put(struct drm_device *dev,
335 struct drm_mode_object *object)
336{
337 mutex_lock(&dev->mode_config.idr_mutex);
338 idr_remove(&dev->mode_config.crtc_idr, object->id);
339 mutex_unlock(&dev->mode_config.idr_mutex);
340}
341
342static struct drm_mode_object *_object_find(struct drm_device *dev,
343 uint32_t id, uint32_t type)
344{
345 struct drm_mode_object *obj = NULL;
346
347 mutex_lock(&dev->mode_config.idr_mutex);
348 obj = idr_find(&dev->mode_config.crtc_idr, id);
349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
350 obj = NULL;
351 if (obj && obj->id != id)
352 obj = NULL;
353 /* don't leak out unref'd fb's */
354 if (obj &&
355 (obj->type == DRM_MODE_OBJECT_FB ||
356 obj->type == DRM_MODE_OBJECT_BLOB))
357 obj = NULL;
358 mutex_unlock(&dev->mode_config.idr_mutex);
359
360 return obj;
361}
362
363/**
364 * drm_mode_object_find - look up a drm object with static lifetime
365 * @dev: drm device
366 * @id: id of the mode object
367 * @type: type of the mode object
368 *
369 * Note that framebuffers cannot be looked up with this functions - since those
370 * are reference counted, they need special treatment. Even with
371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL
372 * rather than WARN_ON()).
373 */
374struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
375 uint32_t id, uint32_t type)
376{
377 struct drm_mode_object *obj = NULL;
378
379 /* Framebuffers are reference counted and need their own lookup
380 * function.*/
381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
382 obj = _object_find(dev, id, type);
383 return obj;
384}
385EXPORT_SYMBOL(drm_mode_object_find);
386
387/**
388 * drm_framebuffer_init - initialize a framebuffer
389 * @dev: DRM device
390 * @fb: framebuffer to be initialized
391 * @funcs: ... with these functions
392 *
393 * Allocates an ID for the framebuffer's parent mode object, sets its mode
394 * functions & device file and adds it to the master fd list.
395 *
396 * IMPORTANT:
397 * This functions publishes the fb and makes it available for concurrent access
398 * by other users. Which means by this point the fb _must_ be fully set up -
399 * since all the fb attributes are invariant over its lifetime, no further
400 * locking but only correct reference counting is required.
401 *
402 * Returns:
403 * Zero on success, error code on failure.
404 */
405int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
406 const struct drm_framebuffer_funcs *funcs)
407{
408 int ret;
409
410 mutex_lock(&dev->mode_config.fb_lock);
411 kref_init(&fb->refcount);
412 INIT_LIST_HEAD(&fb->filp_head);
413 fb->dev = dev;
414 fb->funcs = funcs;
415
416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
417 if (ret)
418 goto out;
419
420 dev->mode_config.num_fb++;
421 list_add(&fb->head, &dev->mode_config.fb_list);
422out:
423 mutex_unlock(&dev->mode_config.fb_lock);
424
425 return ret;
426}
427EXPORT_SYMBOL(drm_framebuffer_init);
428
429/* dev->mode_config.fb_lock must be held! */
430static void __drm_framebuffer_unregister(struct drm_device *dev,
431 struct drm_framebuffer *fb)
432{
433 drm_mode_object_put(dev, &fb->base);
434
435 fb->base.id = 0;
436}
437
438static void drm_framebuffer_free(struct kref *kref)
439{
440 struct drm_framebuffer *fb =
441 container_of(kref, struct drm_framebuffer, refcount);
442 struct drm_device *dev = fb->dev;
443
444 /*
445 * The lookup idr holds a weak reference, which has not necessarily been
446 * removed at this point. Check for that.
447 */
448 mutex_lock(&dev->mode_config.fb_lock);
449 if (fb->base.id) {
450 /* Mark fb as reaped and drop idr ref. */
451 __drm_framebuffer_unregister(dev, fb);
452 }
453 mutex_unlock(&dev->mode_config.fb_lock);
454
455 fb->funcs->destroy(fb);
456}
457
458static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
459 uint32_t id)
460{
461 struct drm_mode_object *obj = NULL;
462 struct drm_framebuffer *fb;
463
464 mutex_lock(&dev->mode_config.idr_mutex);
465 obj = idr_find(&dev->mode_config.crtc_idr, id);
466 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
467 fb = NULL;
468 else
469 fb = obj_to_fb(obj);
470 mutex_unlock(&dev->mode_config.idr_mutex);
471
472 return fb;
473}
474
475/**
476 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
477 * @dev: drm device
478 * @id: id of the fb object
479 *
480 * If successful, this grabs an additional reference to the framebuffer -
481 * callers need to make sure to eventually unreference the returned framebuffer
482 * again, using @drm_framebuffer_unreference.
483 */
484struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
485 uint32_t id)
486{
487 struct drm_framebuffer *fb;
488
489 mutex_lock(&dev->mode_config.fb_lock);
490 fb = __drm_framebuffer_lookup(dev, id);
491 if (fb) {
492 if (!kref_get_unless_zero(&fb->refcount))
493 fb = NULL;
494 }
495 mutex_unlock(&dev->mode_config.fb_lock);
496
497 return fb;
498}
499EXPORT_SYMBOL(drm_framebuffer_lookup);
500
501/**
502 * drm_framebuffer_unreference - unref a framebuffer
503 * @fb: framebuffer to unref
504 *
505 * This functions decrements the fb's refcount and frees it if it drops to zero.
506 */
507void drm_framebuffer_unreference(struct drm_framebuffer *fb)
508{
509 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
510 kref_put(&fb->refcount, drm_framebuffer_free);
511}
512EXPORT_SYMBOL(drm_framebuffer_unreference);
513
514/**
515 * drm_framebuffer_reference - incr the fb refcnt
516 * @fb: framebuffer
517 *
518 * This functions increments the fb's refcount.
519 */
520void drm_framebuffer_reference(struct drm_framebuffer *fb)
521{
522 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
523 kref_get(&fb->refcount);
524}
525EXPORT_SYMBOL(drm_framebuffer_reference);
526
527/**
528 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
529 * @fb: fb to unregister
530 *
531 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
532 * those used for fbdev. Note that the caller must hold a reference of it's own,
533 * i.e. the object may not be destroyed through this call (since it'll lead to a
534 * locking inversion).
535 */
536void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
537{
538 struct drm_device *dev;
539
540 if (!fb)
541 return;
542
543 dev = fb->dev;
544
545 mutex_lock(&dev->mode_config.fb_lock);
546 /* Mark fb as reaped and drop idr ref. */
547 __drm_framebuffer_unregister(dev, fb);
548 mutex_unlock(&dev->mode_config.fb_lock);
549}
550EXPORT_SYMBOL(drm_framebuffer_unregister_private);
551
552/**
553 * drm_framebuffer_cleanup - remove a framebuffer object
554 * @fb: framebuffer to remove
555 *
556 * Cleanup framebuffer. This function is intended to be used from the drivers
557 * ->destroy callback. It can also be used to clean up driver private
558 * framebuffers embedded into a larger structure.
559 *
560 * Note that this function does not remove the fb from active usuage - if it is
561 * still used anywhere, hilarity can ensue since userspace could call getfb on
562 * the id and get back -EINVAL. Obviously no concern at driver unload time.
563 *
564 * Also, the framebuffer will not be removed from the lookup idr - for
565 * user-created framebuffers this will happen in in the rmfb ioctl. For
566 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
567 * drm_framebuffer_unregister_private.
568 */
569void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
570{
571 struct drm_device *dev = fb->dev;
572
573 mutex_lock(&dev->mode_config.fb_lock);
574 list_del(&fb->head);
575 dev->mode_config.num_fb--;
576 mutex_unlock(&dev->mode_config.fb_lock);
577}
578EXPORT_SYMBOL(drm_framebuffer_cleanup);
579
580/**
581 * drm_framebuffer_remove - remove and unreference a framebuffer object
582 * @fb: framebuffer to remove
583 *
584 * Scans all the CRTCs and planes in @dev's mode_config. If they're
585 * using @fb, removes it, setting it to NULL. Then drops the reference to the
586 * passed-in framebuffer. Might take the modeset locks.
587 *
588 * Note that this function optimizes the cleanup away if the caller holds the
589 * last reference to the framebuffer. It is also guaranteed to not take the
590 * modeset locks in this case.
591 */
592void drm_framebuffer_remove(struct drm_framebuffer *fb)
593{
594 struct drm_device *dev;
595 struct drm_crtc *crtc;
596 struct drm_plane *plane;
597 struct drm_mode_set set;
598 int ret;
599
600 if (!fb)
601 return;
602
603 dev = fb->dev;
604
605 WARN_ON(!list_empty(&fb->filp_head));
606
607 /*
608 * drm ABI mandates that we remove any deleted framebuffers from active
609 * useage. But since most sane clients only remove framebuffers they no
610 * longer need, try to optimize this away.
611 *
612 * Since we're holding a reference ourselves, observing a refcount of 1
613 * means that we're the last holder and can skip it. Also, the refcount
614 * can never increase from 1 again, so we don't need any barriers or
615 * locks.
616 *
617 * Note that userspace could try to race with use and instate a new
618 * usage _after_ we've cleared all current ones. End result will be an
619 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
620 * in this manner.
621 */
622 if (atomic_read(&fb->refcount.refcount) > 1) {
623 drm_modeset_lock_all(dev);
624 /* remove from any CRTC */
625 drm_for_each_crtc(crtc, dev) {
626 if (crtc->primary->fb == fb) {
627 /* should turn off the crtc */
628 memset(&set, 0, sizeof(struct drm_mode_set));
629 set.crtc = crtc;
630 set.fb = NULL;
631 ret = drm_mode_set_config_internal(&set);
632 if (ret)
633 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
634 }
635 }
636
637 drm_for_each_plane(plane, dev) {
638 if (plane->fb == fb)
639 drm_plane_force_disable(plane);
640 }
641 drm_modeset_unlock_all(dev);
642 }
643
644 drm_framebuffer_unreference(fb);
645}
646EXPORT_SYMBOL(drm_framebuffer_remove);
647
648DEFINE_WW_CLASS(crtc_ww_class);
649
650static unsigned int drm_num_crtcs(struct drm_device *dev)
651{
652 unsigned int num = 0;
653 struct drm_crtc *tmp;
654
655 drm_for_each_crtc(tmp, dev) {
656 num++;
657 }
658
659 return num;
660}
661
662/**
663 * drm_crtc_init_with_planes - Initialise a new CRTC object with
664 * specified primary and cursor planes.
665 * @dev: DRM device
666 * @crtc: CRTC object to init
667 * @primary: Primary plane for CRTC
668 * @cursor: Cursor plane for CRTC
669 * @funcs: callbacks for the new CRTC
670 * @name: printf style format string for the CRTC name, or NULL for default name
671 *
672 * Inits a new object created as base part of a driver crtc object.
673 *
674 * Returns:
675 * Zero on success, error code on failure.
676 */
677int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
678 struct drm_plane *primary,
679 struct drm_plane *cursor,
680 const struct drm_crtc_funcs *funcs,
681 const char *name, ...)
682{
683 struct drm_mode_config *config = &dev->mode_config;
684 int ret;
685
686 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
687 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
688
689 crtc->dev = dev;
690 crtc->funcs = funcs;
691
692 drm_modeset_lock_init(&crtc->mutex);
693 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
694 if (ret)
695 return ret;
696
697 if (name) {
698 va_list ap;
699
700 va_start(ap, name);
701 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
702 va_end(ap);
703 } else {
704 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
705 drm_num_crtcs(dev));
706 }
707 if (!crtc->name) {
708 drm_mode_object_put(dev, &crtc->base);
709 return -ENOMEM;
710 }
711
712 crtc->base.properties = &crtc->properties;
713
714 list_add_tail(&crtc->head, &config->crtc_list);
715 config->num_crtc++;
716
717 crtc->primary = primary;
718 crtc->cursor = cursor;
719 if (primary)
720 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
721 if (cursor)
722 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
723
724 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
725 drm_object_attach_property(&crtc->base, config->prop_active, 0);
726 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
727 }
728
729 return 0;
730}
731EXPORT_SYMBOL(drm_crtc_init_with_planes);
732
733/**
734 * drm_crtc_cleanup - Clean up the core crtc usage
735 * @crtc: CRTC to cleanup
736 *
737 * This function cleans up @crtc and removes it from the DRM mode setting
738 * core. Note that the function does *not* free the crtc structure itself,
739 * this is the responsibility of the caller.
740 */
741void drm_crtc_cleanup(struct drm_crtc *crtc)
742{
743 struct drm_device *dev = crtc->dev;
744
745 kfree(crtc->gamma_store);
746 crtc->gamma_store = NULL;
747
748 drm_modeset_lock_fini(&crtc->mutex);
749
750 drm_mode_object_put(dev, &crtc->base);
751 list_del(&crtc->head);
752 dev->mode_config.num_crtc--;
753
754 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
755 if (crtc->state && crtc->funcs->atomic_destroy_state)
756 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
757
758 kfree(crtc->name);
759
760 memset(crtc, 0, sizeof(*crtc));
761}
762EXPORT_SYMBOL(drm_crtc_cleanup);
763
764/**
765 * drm_crtc_index - find the index of a registered CRTC
766 * @crtc: CRTC to find index for
767 *
768 * Given a registered CRTC, return the index of that CRTC within a DRM
769 * device's list of CRTCs.
770 */
771unsigned int drm_crtc_index(struct drm_crtc *crtc)
772{
773 unsigned int index = 0;
774 struct drm_crtc *tmp;
775
776 drm_for_each_crtc(tmp, crtc->dev) {
777 if (tmp == crtc)
778 return index;
779
780 index++;
781 }
782
783 BUG();
784}
785EXPORT_SYMBOL(drm_crtc_index);
786
787/*
788 * drm_mode_remove - remove and free a mode
789 * @connector: connector list to modify
790 * @mode: mode to remove
791 *
792 * Remove @mode from @connector's mode list, then free it.
793 */
794static void drm_mode_remove(struct drm_connector *connector,
795 struct drm_display_mode *mode)
796{
797 list_del(&mode->head);
798 drm_mode_destroy(connector->dev, mode);
799}
800
801/**
802 * drm_display_info_set_bus_formats - set the supported bus formats
803 * @info: display info to store bus formats in
804 * @formats: array containing the supported bus formats
805 * @num_formats: the number of entries in the fmts array
806 *
807 * Store the supported bus formats in display info structure.
808 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
809 * a full list of available formats.
810 */
811int drm_display_info_set_bus_formats(struct drm_display_info *info,
812 const u32 *formats,
813 unsigned int num_formats)
814{
815 u32 *fmts = NULL;
816
817 if (!formats && num_formats)
818 return -EINVAL;
819
820 if (formats && num_formats) {
821 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
822 GFP_KERNEL);
823 if (!fmts)
824 return -ENOMEM;
825 }
826
827 kfree(info->bus_formats);
828 info->bus_formats = fmts;
829 info->num_bus_formats = num_formats;
830
831 return 0;
832}
833EXPORT_SYMBOL(drm_display_info_set_bus_formats);
834
835/**
836 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
837 * @connector: connector to quwery
838 *
839 * The kernel supports per-connector configration of its consoles through
840 * use of the video= parameter. This function parses that option and
841 * extracts the user's specified mode (or enable/disable status) for a
842 * particular connector. This is typically only used during the early fbdev
843 * setup.
844 */
845static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
846{
847 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
848 char *option = NULL;
849
850 if (fb_get_options(connector->name, &option))
851 return;
852
853 if (!drm_mode_parse_command_line_for_connector(option,
854 connector,
855 mode))
856 return;
857
858 if (mode->force) {
859 const char *s;
860
861 switch (mode->force) {
862 case DRM_FORCE_OFF:
863 s = "OFF";
864 break;
865 case DRM_FORCE_ON_DIGITAL:
866 s = "ON - dig";
867 break;
868 default:
869 case DRM_FORCE_ON:
870 s = "ON";
871 break;
872 }
873
874 DRM_INFO("forcing %s connector %s\n", connector->name, s);
875 connector->force = mode->force;
876 }
877
878 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
879 connector->name,
880 mode->xres, mode->yres,
881 mode->refresh_specified ? mode->refresh : 60,
882 mode->rb ? " reduced blanking" : "",
883 mode->margins ? " with margins" : "",
884 mode->interlace ? " interlaced" : "");
885}
886
887/**
888 * drm_connector_init - Init a preallocated connector
889 * @dev: DRM device
890 * @connector: the connector to init
891 * @funcs: callbacks for this connector
892 * @connector_type: user visible type of the connector
893 *
894 * Initialises a preallocated connector. Connectors should be
895 * subclassed as part of driver connector objects.
896 *
897 * Returns:
898 * Zero on success, error code on failure.
899 */
900int drm_connector_init(struct drm_device *dev,
901 struct drm_connector *connector,
902 const struct drm_connector_funcs *funcs,
903 int connector_type)
904{
905 struct drm_mode_config *config = &dev->mode_config;
906 int ret;
907 struct ida *connector_ida =
908 &drm_connector_enum_list[connector_type].ida;
909
910 drm_modeset_lock_all(dev);
911
912 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
913 if (ret)
914 goto out_unlock;
915
916 connector->base.properties = &connector->properties;
917 connector->dev = dev;
918 connector->funcs = funcs;
919
920 connector->connector_id = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
921 if (connector->connector_id < 0) {
922 ret = connector->connector_id;
923 goto out_put;
924 }
925
926 connector->connector_type = connector_type;
927 connector->connector_type_id =
928 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
929 if (connector->connector_type_id < 0) {
930 ret = connector->connector_type_id;
931 goto out_put_id;
932 }
933 connector->name =
934 kasprintf(GFP_KERNEL, "%s-%d",
935 drm_connector_enum_list[connector_type].name,
936 connector->connector_type_id);
937 if (!connector->name) {
938 ret = -ENOMEM;
939 goto out_put_type_id;
940 }
941
942 INIT_LIST_HEAD(&connector->probed_modes);
943 INIT_LIST_HEAD(&connector->modes);
944 connector->edid_blob_ptr = NULL;
945 connector->status = connector_status_unknown;
946
947 drm_connector_get_cmdline_mode(connector);
948
949 /* We should add connectors at the end to avoid upsetting the connector
950 * index too much. */
951 list_add_tail(&connector->head, &config->connector_list);
952 config->num_connector++;
953
954 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
955 drm_object_attach_property(&connector->base,
956 config->edid_property,
957 0);
958
959 drm_object_attach_property(&connector->base,
960 config->dpms_property, 0);
961
962 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
963 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
964 }
965
966 connector->debugfs_entry = NULL;
967out_put_type_id:
968 if (ret)
969 ida_remove(connector_ida, connector->connector_type_id);
970out_put_id:
971 if (ret)
972 ida_remove(&config->connector_ida, connector->connector_id);
973out_put:
974 if (ret)
975 drm_mode_object_put(dev, &connector->base);
976
977out_unlock:
978 drm_modeset_unlock_all(dev);
979
980 return ret;
981}
982EXPORT_SYMBOL(drm_connector_init);
983
984/**
985 * drm_connector_cleanup - cleans up an initialised connector
986 * @connector: connector to cleanup
987 *
988 * Cleans up the connector but doesn't free the object.
989 */
990void drm_connector_cleanup(struct drm_connector *connector)
991{
992 struct drm_device *dev = connector->dev;
993 struct drm_display_mode *mode, *t;
994
995 if (connector->tile_group) {
996 drm_mode_put_tile_group(dev, connector->tile_group);
997 connector->tile_group = NULL;
998 }
999
1000 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
1001 drm_mode_remove(connector, mode);
1002
1003 list_for_each_entry_safe(mode, t, &connector->modes, head)
1004 drm_mode_remove(connector, mode);
1005
1006 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
1007 connector->connector_type_id);
1008
1009 ida_remove(&dev->mode_config.connector_ida,
1010 connector->connector_id);
1011
1012 kfree(connector->display_info.bus_formats);
1013 drm_mode_object_put(dev, &connector->base);
1014 kfree(connector->name);
1015 connector->name = NULL;
1016 list_del(&connector->head);
1017 dev->mode_config.num_connector--;
1018
1019 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
1020 if (connector->state && connector->funcs->atomic_destroy_state)
1021 connector->funcs->atomic_destroy_state(connector,
1022 connector->state);
1023
1024 memset(connector, 0, sizeof(*connector));
1025}
1026EXPORT_SYMBOL(drm_connector_cleanup);
1027
1028/**
1029 * drm_connector_register - register a connector
1030 * @connector: the connector to register
1031 *
1032 * Register userspace interfaces for a connector
1033 *
1034 * Returns:
1035 * Zero on success, error code on failure.
1036 */
1037int drm_connector_register(struct drm_connector *connector)
1038{
1039 int ret;
1040
1041 drm_mode_object_register(connector->dev, &connector->base);
1042
1043 ret = drm_sysfs_connector_add(connector);
1044 if (ret)
1045 return ret;
1046
1047 ret = drm_debugfs_connector_add(connector);
1048 if (ret) {
1049 drm_sysfs_connector_remove(connector);
1050 return ret;
1051 }
1052
1053 return 0;
1054}
1055EXPORT_SYMBOL(drm_connector_register);
1056
1057/**
1058 * drm_connector_unregister - unregister a connector
1059 * @connector: the connector to unregister
1060 *
1061 * Unregister userspace interfaces for a connector
1062 */
1063void drm_connector_unregister(struct drm_connector *connector)
1064{
1065 drm_sysfs_connector_remove(connector);
1066 drm_debugfs_connector_remove(connector);
1067}
1068EXPORT_SYMBOL(drm_connector_unregister);
1069
1070
1071/**
1072 * drm_connector_unplug_all - unregister connector userspace interfaces
1073 * @dev: drm device
1074 *
1075 * This function unregisters all connector userspace interfaces in sysfs. Should
1076 * be call when the device is disconnected, e.g. from an usb driver's
1077 * ->disconnect callback.
1078 */
1079void drm_connector_unplug_all(struct drm_device *dev)
1080{
1081 struct drm_connector *connector;
1082
1083 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
1084 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1085 drm_connector_unregister(connector);
1086
1087}
1088EXPORT_SYMBOL(drm_connector_unplug_all);
1089
1090/**
1091 * drm_encoder_init - Init a preallocated encoder
1092 * @dev: drm device
1093 * @encoder: the encoder to init
1094 * @funcs: callbacks for this encoder
1095 * @encoder_type: user visible type of the encoder
1096 * @name: printf style format string for the encoder name, or NULL for default name
1097 *
1098 * Initialises a preallocated encoder. Encoder should be
1099 * subclassed as part of driver encoder objects.
1100 *
1101 * Returns:
1102 * Zero on success, error code on failure.
1103 */
1104int drm_encoder_init(struct drm_device *dev,
1105 struct drm_encoder *encoder,
1106 const struct drm_encoder_funcs *funcs,
1107 int encoder_type, const char *name, ...)
1108{
1109 int ret;
1110
1111 drm_modeset_lock_all(dev);
1112
1113 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1114 if (ret)
1115 goto out_unlock;
1116
1117 encoder->dev = dev;
1118 encoder->encoder_type = encoder_type;
1119 encoder->funcs = funcs;
1120 if (name) {
1121 va_list ap;
1122
1123 va_start(ap, name);
1124 encoder->name = kvasprintf(GFP_KERNEL, name, ap);
1125 va_end(ap);
1126 } else {
1127 encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
1128 drm_encoder_enum_list[encoder_type].name,
1129 encoder->base.id);
1130 }
1131 if (!encoder->name) {
1132 ret = -ENOMEM;
1133 goto out_put;
1134 }
1135
1136 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1137 dev->mode_config.num_encoder++;
1138
1139out_put:
1140 if (ret)
1141 drm_mode_object_put(dev, &encoder->base);
1142
1143out_unlock:
1144 drm_modeset_unlock_all(dev);
1145
1146 return ret;
1147}
1148EXPORT_SYMBOL(drm_encoder_init);
1149
1150/**
1151 * drm_encoder_index - find the index of a registered encoder
1152 * @encoder: encoder to find index for
1153 *
1154 * Given a registered encoder, return the index of that encoder within a DRM
1155 * device's list of encoders.
1156 */
1157unsigned int drm_encoder_index(struct drm_encoder *encoder)
1158{
1159 unsigned int index = 0;
1160 struct drm_encoder *tmp;
1161
1162 drm_for_each_encoder(tmp, encoder->dev) {
1163 if (tmp == encoder)
1164 return index;
1165
1166 index++;
1167 }
1168
1169 BUG();
1170}
1171EXPORT_SYMBOL(drm_encoder_index);
1172
1173/**
1174 * drm_encoder_cleanup - cleans up an initialised encoder
1175 * @encoder: encoder to cleanup
1176 *
1177 * Cleans up the encoder but doesn't free the object.
1178 */
1179void drm_encoder_cleanup(struct drm_encoder *encoder)
1180{
1181 struct drm_device *dev = encoder->dev;
1182
1183 drm_modeset_lock_all(dev);
1184 drm_mode_object_put(dev, &encoder->base);
1185 kfree(encoder->name);
1186 list_del(&encoder->head);
1187 dev->mode_config.num_encoder--;
1188 drm_modeset_unlock_all(dev);
1189
1190 memset(encoder, 0, sizeof(*encoder));
1191}
1192EXPORT_SYMBOL(drm_encoder_cleanup);
1193
1194static unsigned int drm_num_planes(struct drm_device *dev)
1195{
1196 unsigned int num = 0;
1197 struct drm_plane *tmp;
1198
1199 drm_for_each_plane(tmp, dev) {
1200 num++;
1201 }
1202
1203 return num;
1204}
1205
1206/**
1207 * drm_universal_plane_init - Initialize a new universal plane object
1208 * @dev: DRM device
1209 * @plane: plane object to init
1210 * @possible_crtcs: bitmask of possible CRTCs
1211 * @funcs: callbacks for the new plane
1212 * @formats: array of supported formats (%DRM_FORMAT_*)
1213 * @format_count: number of elements in @formats
1214 * @type: type of plane (overlay, primary, cursor)
1215 * @name: printf style format string for the plane name, or NULL for default name
1216 *
1217 * Initializes a plane object of type @type.
1218 *
1219 * Returns:
1220 * Zero on success, error code on failure.
1221 */
1222int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1223 unsigned long possible_crtcs,
1224 const struct drm_plane_funcs *funcs,
1225 const uint32_t *formats, unsigned int format_count,
1226 enum drm_plane_type type,
1227 const char *name, ...)
1228{
1229 struct drm_mode_config *config = &dev->mode_config;
1230 int ret;
1231
1232 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1233 if (ret)
1234 return ret;
1235
1236 drm_modeset_lock_init(&plane->mutex);
1237
1238 plane->base.properties = &plane->properties;
1239 plane->dev = dev;
1240 plane->funcs = funcs;
1241 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
1242 GFP_KERNEL);
1243 if (!plane->format_types) {
1244 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1245 drm_mode_object_put(dev, &plane->base);
1246 return -ENOMEM;
1247 }
1248
1249 if (name) {
1250 va_list ap;
1251
1252 va_start(ap, name);
1253 plane->name = kvasprintf(GFP_KERNEL, name, ap);
1254 va_end(ap);
1255 } else {
1256 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
1257 drm_num_planes(dev));
1258 }
1259 if (!plane->name) {
1260 kfree(plane->format_types);
1261 drm_mode_object_put(dev, &plane->base);
1262 return -ENOMEM;
1263 }
1264
1265 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
1266 plane->format_count = format_count;
1267 plane->possible_crtcs = possible_crtcs;
1268 plane->type = type;
1269
1270 list_add_tail(&plane->head, &config->plane_list);
1271 config->num_total_plane++;
1272 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1273 config->num_overlay_plane++;
1274
1275 drm_object_attach_property(&plane->base,
1276 config->plane_type_property,
1277 plane->type);
1278
1279 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
1280 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
1281 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
1282 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
1283 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
1284 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
1285 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
1286 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
1287 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
1288 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
1289 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
1290 }
1291
1292 return 0;
1293}
1294EXPORT_SYMBOL(drm_universal_plane_init);
1295
1296/**
1297 * drm_plane_init - Initialize a legacy plane
1298 * @dev: DRM device
1299 * @plane: plane object to init
1300 * @possible_crtcs: bitmask of possible CRTCs
1301 * @funcs: callbacks for the new plane
1302 * @formats: array of supported formats (%DRM_FORMAT_*)
1303 * @format_count: number of elements in @formats
1304 * @is_primary: plane type (primary vs overlay)
1305 *
1306 * Legacy API to initialize a DRM plane.
1307 *
1308 * New drivers should call drm_universal_plane_init() instead.
1309 *
1310 * Returns:
1311 * Zero on success, error code on failure.
1312 */
1313int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1314 unsigned long possible_crtcs,
1315 const struct drm_plane_funcs *funcs,
1316 const uint32_t *formats, unsigned int format_count,
1317 bool is_primary)
1318{
1319 enum drm_plane_type type;
1320
1321 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1322 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1323 formats, format_count, type, NULL);
1324}
1325EXPORT_SYMBOL(drm_plane_init);
1326
1327/**
1328 * drm_plane_cleanup - Clean up the core plane usage
1329 * @plane: plane to cleanup
1330 *
1331 * This function cleans up @plane and removes it from the DRM mode setting
1332 * core. Note that the function does *not* free the plane structure itself,
1333 * this is the responsibility of the caller.
1334 */
1335void drm_plane_cleanup(struct drm_plane *plane)
1336{
1337 struct drm_device *dev = plane->dev;
1338
1339 drm_modeset_lock_all(dev);
1340 kfree(plane->format_types);
1341 drm_mode_object_put(dev, &plane->base);
1342
1343 BUG_ON(list_empty(&plane->head));
1344
1345 list_del(&plane->head);
1346 dev->mode_config.num_total_plane--;
1347 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1348 dev->mode_config.num_overlay_plane--;
1349 drm_modeset_unlock_all(dev);
1350
1351 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
1352 if (plane->state && plane->funcs->atomic_destroy_state)
1353 plane->funcs->atomic_destroy_state(plane, plane->state);
1354
1355 kfree(plane->name);
1356
1357 memset(plane, 0, sizeof(*plane));
1358}
1359EXPORT_SYMBOL(drm_plane_cleanup);
1360
1361/**
1362 * drm_plane_index - find the index of a registered plane
1363 * @plane: plane to find index for
1364 *
1365 * Given a registered plane, return the index of that CRTC within a DRM
1366 * device's list of planes.
1367 */
1368unsigned int drm_plane_index(struct drm_plane *plane)
1369{
1370 unsigned int index = 0;
1371 struct drm_plane *tmp;
1372
1373 drm_for_each_plane(tmp, plane->dev) {
1374 if (tmp == plane)
1375 return index;
1376
1377 index++;
1378 }
1379
1380 BUG();
1381}
1382EXPORT_SYMBOL(drm_plane_index);
1383
1384/**
1385 * drm_plane_from_index - find the registered plane at an index
1386 * @dev: DRM device
1387 * @idx: index of registered plane to find for
1388 *
1389 * Given a plane index, return the registered plane from DRM device's
1390 * list of planes with matching index.
1391 */
1392struct drm_plane *
1393drm_plane_from_index(struct drm_device *dev, int idx)
1394{
1395 struct drm_plane *plane;
1396 unsigned int i = 0;
1397
1398 drm_for_each_plane(plane, dev) {
1399 if (i == idx)
1400 return plane;
1401 i++;
1402 }
1403 return NULL;
1404}
1405EXPORT_SYMBOL(drm_plane_from_index);
1406
1407/**
1408 * drm_plane_force_disable - Forcibly disable a plane
1409 * @plane: plane to disable
1410 *
1411 * Forces the plane to be disabled.
1412 *
1413 * Used when the plane's current framebuffer is destroyed,
1414 * and when restoring fbdev mode.
1415 */
1416void drm_plane_force_disable(struct drm_plane *plane)
1417{
1418 int ret;
1419
1420 if (!plane->fb)
1421 return;
1422
1423 plane->old_fb = plane->fb;
1424 ret = plane->funcs->disable_plane(plane);
1425 if (ret) {
1426 DRM_ERROR("failed to disable plane with busy fb\n");
1427 plane->old_fb = NULL;
1428 return;
1429 }
1430 /* disconnect the plane from the fb and crtc: */
1431 drm_framebuffer_unreference(plane->old_fb);
1432 plane->old_fb = NULL;
1433 plane->fb = NULL;
1434 plane->crtc = NULL;
1435}
1436EXPORT_SYMBOL(drm_plane_force_disable);
1437
1438static int drm_mode_create_standard_properties(struct drm_device *dev)
1439{
1440 struct drm_property *prop;
1441
1442 /*
1443 * Standard properties (apply to all connectors)
1444 */
1445 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1446 DRM_MODE_PROP_IMMUTABLE,
1447 "EDID", 0);
1448 if (!prop)
1449 return -ENOMEM;
1450 dev->mode_config.edid_property = prop;
1451
1452 prop = drm_property_create_enum(dev, 0,
1453 "DPMS", drm_dpms_enum_list,
1454 ARRAY_SIZE(drm_dpms_enum_list));
1455 if (!prop)
1456 return -ENOMEM;
1457 dev->mode_config.dpms_property = prop;
1458
1459 prop = drm_property_create(dev,
1460 DRM_MODE_PROP_BLOB |
1461 DRM_MODE_PROP_IMMUTABLE,
1462 "PATH", 0);
1463 if (!prop)
1464 return -ENOMEM;
1465 dev->mode_config.path_property = prop;
1466
1467 prop = drm_property_create(dev,
1468 DRM_MODE_PROP_BLOB |
1469 DRM_MODE_PROP_IMMUTABLE,
1470 "TILE", 0);
1471 if (!prop)
1472 return -ENOMEM;
1473 dev->mode_config.tile_property = prop;
1474
1475 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1476 "type", drm_plane_type_enum_list,
1477 ARRAY_SIZE(drm_plane_type_enum_list));
1478 if (!prop)
1479 return -ENOMEM;
1480 dev->mode_config.plane_type_property = prop;
1481
1482 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1483 "SRC_X", 0, UINT_MAX);
1484 if (!prop)
1485 return -ENOMEM;
1486 dev->mode_config.prop_src_x = prop;
1487
1488 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1489 "SRC_Y", 0, UINT_MAX);
1490 if (!prop)
1491 return -ENOMEM;
1492 dev->mode_config.prop_src_y = prop;
1493
1494 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1495 "SRC_W", 0, UINT_MAX);
1496 if (!prop)
1497 return -ENOMEM;
1498 dev->mode_config.prop_src_w = prop;
1499
1500 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1501 "SRC_H", 0, UINT_MAX);
1502 if (!prop)
1503 return -ENOMEM;
1504 dev->mode_config.prop_src_h = prop;
1505
1506 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1507 "CRTC_X", INT_MIN, INT_MAX);
1508 if (!prop)
1509 return -ENOMEM;
1510 dev->mode_config.prop_crtc_x = prop;
1511
1512 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1513 "CRTC_Y", INT_MIN, INT_MAX);
1514 if (!prop)
1515 return -ENOMEM;
1516 dev->mode_config.prop_crtc_y = prop;
1517
1518 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1519 "CRTC_W", 0, INT_MAX);
1520 if (!prop)
1521 return -ENOMEM;
1522 dev->mode_config.prop_crtc_w = prop;
1523
1524 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1525 "CRTC_H", 0, INT_MAX);
1526 if (!prop)
1527 return -ENOMEM;
1528 dev->mode_config.prop_crtc_h = prop;
1529
1530 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1531 "FB_ID", DRM_MODE_OBJECT_FB);
1532 if (!prop)
1533 return -ENOMEM;
1534 dev->mode_config.prop_fb_id = prop;
1535
1536 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1537 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
1538 if (!prop)
1539 return -ENOMEM;
1540 dev->mode_config.prop_crtc_id = prop;
1541
1542 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
1543 "ACTIVE");
1544 if (!prop)
1545 return -ENOMEM;
1546 dev->mode_config.prop_active = prop;
1547
1548 prop = drm_property_create(dev,
1549 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
1550 "MODE_ID", 0);
1551 if (!prop)
1552 return -ENOMEM;
1553 dev->mode_config.prop_mode_id = prop;
1554
1555 prop = drm_property_create(dev,
1556 DRM_MODE_PROP_BLOB,
1557 "DEGAMMA_LUT", 0);
1558 if (!prop)
1559 return -ENOMEM;
1560 dev->mode_config.degamma_lut_property = prop;
1561
1562 prop = drm_property_create_range(dev,
1563 DRM_MODE_PROP_IMMUTABLE,
1564 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
1565 if (!prop)
1566 return -ENOMEM;
1567 dev->mode_config.degamma_lut_size_property = prop;
1568
1569 prop = drm_property_create(dev,
1570 DRM_MODE_PROP_BLOB,
1571 "CTM", 0);
1572 if (!prop)
1573 return -ENOMEM;
1574 dev->mode_config.ctm_property = prop;
1575
1576 prop = drm_property_create(dev,
1577 DRM_MODE_PROP_BLOB,
1578 "GAMMA_LUT", 0);
1579 if (!prop)
1580 return -ENOMEM;
1581 dev->mode_config.gamma_lut_property = prop;
1582
1583 prop = drm_property_create_range(dev,
1584 DRM_MODE_PROP_IMMUTABLE,
1585 "GAMMA_LUT_SIZE", 0, UINT_MAX);
1586 if (!prop)
1587 return -ENOMEM;
1588 dev->mode_config.gamma_lut_size_property = prop;
1589
1590 return 0;
1591}
1592
1593/**
1594 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1595 * @dev: DRM device
1596 *
1597 * Called by a driver the first time a DVI-I connector is made.
1598 */
1599int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1600{
1601 struct drm_property *dvi_i_selector;
1602 struct drm_property *dvi_i_subconnector;
1603
1604 if (dev->mode_config.dvi_i_select_subconnector_property)
1605 return 0;
1606
1607 dvi_i_selector =
1608 drm_property_create_enum(dev, 0,
1609 "select subconnector",
1610 drm_dvi_i_select_enum_list,
1611 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1612 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1613
1614 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1615 "subconnector",
1616 drm_dvi_i_subconnector_enum_list,
1617 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1618 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1619
1620 return 0;
1621}
1622EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1623
1624/**
1625 * drm_create_tv_properties - create TV specific connector properties
1626 * @dev: DRM device
1627 * @num_modes: number of different TV formats (modes) supported
1628 * @modes: array of pointers to strings containing name of each format
1629 *
1630 * Called by a driver's TV initialization routine, this function creates
1631 * the TV specific connector properties for a given device. Caller is
1632 * responsible for allocating a list of format names and passing them to
1633 * this routine.
1634 */
1635int drm_mode_create_tv_properties(struct drm_device *dev,
1636 unsigned int num_modes,
1637 const char * const modes[])
1638{
1639 struct drm_property *tv_selector;
1640 struct drm_property *tv_subconnector;
1641 unsigned int i;
1642
1643 if (dev->mode_config.tv_select_subconnector_property)
1644 return 0;
1645
1646 /*
1647 * Basic connector properties
1648 */
1649 tv_selector = drm_property_create_enum(dev, 0,
1650 "select subconnector",
1651 drm_tv_select_enum_list,
1652 ARRAY_SIZE(drm_tv_select_enum_list));
1653 if (!tv_selector)
1654 goto nomem;
1655
1656 dev->mode_config.tv_select_subconnector_property = tv_selector;
1657
1658 tv_subconnector =
1659 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1660 "subconnector",
1661 drm_tv_subconnector_enum_list,
1662 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1663 if (!tv_subconnector)
1664 goto nomem;
1665 dev->mode_config.tv_subconnector_property = tv_subconnector;
1666
1667 /*
1668 * Other, TV specific properties: margins & TV modes.
1669 */
1670 dev->mode_config.tv_left_margin_property =
1671 drm_property_create_range(dev, 0, "left margin", 0, 100);
1672 if (!dev->mode_config.tv_left_margin_property)
1673 goto nomem;
1674
1675 dev->mode_config.tv_right_margin_property =
1676 drm_property_create_range(dev, 0, "right margin", 0, 100);
1677 if (!dev->mode_config.tv_right_margin_property)
1678 goto nomem;
1679
1680 dev->mode_config.tv_top_margin_property =
1681 drm_property_create_range(dev, 0, "top margin", 0, 100);
1682 if (!dev->mode_config.tv_top_margin_property)
1683 goto nomem;
1684
1685 dev->mode_config.tv_bottom_margin_property =
1686 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1687 if (!dev->mode_config.tv_bottom_margin_property)
1688 goto nomem;
1689
1690 dev->mode_config.tv_mode_property =
1691 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1692 "mode", num_modes);
1693 if (!dev->mode_config.tv_mode_property)
1694 goto nomem;
1695
1696 for (i = 0; i < num_modes; i++)
1697 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1698 i, modes[i]);
1699
1700 dev->mode_config.tv_brightness_property =
1701 drm_property_create_range(dev, 0, "brightness", 0, 100);
1702 if (!dev->mode_config.tv_brightness_property)
1703 goto nomem;
1704
1705 dev->mode_config.tv_contrast_property =
1706 drm_property_create_range(dev, 0, "contrast", 0, 100);
1707 if (!dev->mode_config.tv_contrast_property)
1708 goto nomem;
1709
1710 dev->mode_config.tv_flicker_reduction_property =
1711 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1712 if (!dev->mode_config.tv_flicker_reduction_property)
1713 goto nomem;
1714
1715 dev->mode_config.tv_overscan_property =
1716 drm_property_create_range(dev, 0, "overscan", 0, 100);
1717 if (!dev->mode_config.tv_overscan_property)
1718 goto nomem;
1719
1720 dev->mode_config.tv_saturation_property =
1721 drm_property_create_range(dev, 0, "saturation", 0, 100);
1722 if (!dev->mode_config.tv_saturation_property)
1723 goto nomem;
1724
1725 dev->mode_config.tv_hue_property =
1726 drm_property_create_range(dev, 0, "hue", 0, 100);
1727 if (!dev->mode_config.tv_hue_property)
1728 goto nomem;
1729
1730 return 0;
1731nomem:
1732 return -ENOMEM;
1733}
1734EXPORT_SYMBOL(drm_mode_create_tv_properties);
1735
1736/**
1737 * drm_mode_create_scaling_mode_property - create scaling mode property
1738 * @dev: DRM device
1739 *
1740 * Called by a driver the first time it's needed, must be attached to desired
1741 * connectors.
1742 */
1743int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1744{
1745 struct drm_property *scaling_mode;
1746
1747 if (dev->mode_config.scaling_mode_property)
1748 return 0;
1749
1750 scaling_mode =
1751 drm_property_create_enum(dev, 0, "scaling mode",
1752 drm_scaling_mode_enum_list,
1753 ARRAY_SIZE(drm_scaling_mode_enum_list));
1754
1755 dev->mode_config.scaling_mode_property = scaling_mode;
1756
1757 return 0;
1758}
1759EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1760
1761/**
1762 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1763 * @dev: DRM device
1764 *
1765 * Called by a driver the first time it's needed, must be attached to desired
1766 * connectors.
1767 *
1768 * Returns:
1769 * Zero on success, negative errno on failure.
1770 */
1771int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1772{
1773 if (dev->mode_config.aspect_ratio_property)
1774 return 0;
1775
1776 dev->mode_config.aspect_ratio_property =
1777 drm_property_create_enum(dev, 0, "aspect ratio",
1778 drm_aspect_ratio_enum_list,
1779 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1780
1781 if (dev->mode_config.aspect_ratio_property == NULL)
1782 return -ENOMEM;
1783
1784 return 0;
1785}
1786EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1787
1788/**
1789 * drm_mode_create_dirty_property - create dirty property
1790 * @dev: DRM device
1791 *
1792 * Called by a driver the first time it's needed, must be attached to desired
1793 * connectors.
1794 */
1795int drm_mode_create_dirty_info_property(struct drm_device *dev)
1796{
1797 struct drm_property *dirty_info;
1798
1799 if (dev->mode_config.dirty_info_property)
1800 return 0;
1801
1802 dirty_info =
1803 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1804 "dirty",
1805 drm_dirty_info_enum_list,
1806 ARRAY_SIZE(drm_dirty_info_enum_list));
1807 dev->mode_config.dirty_info_property = dirty_info;
1808
1809 return 0;
1810}
1811EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1812
1813/**
1814 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1815 * @dev: DRM device
1816 *
1817 * Create the the suggested x/y offset property for connectors.
1818 */
1819int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1820{
1821 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1822 return 0;
1823
1824 dev->mode_config.suggested_x_property =
1825 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1826
1827 dev->mode_config.suggested_y_property =
1828 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1829
1830 if (dev->mode_config.suggested_x_property == NULL ||
1831 dev->mode_config.suggested_y_property == NULL)
1832 return -ENOMEM;
1833 return 0;
1834}
1835EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1836
1837/**
1838 * drm_mode_getresources - get graphics configuration
1839 * @dev: drm device for the ioctl
1840 * @data: data pointer for the ioctl
1841 * @file_priv: drm file for the ioctl call
1842 *
1843 * Construct a set of configuration description structures and return
1844 * them to the user, including CRTC, connector and framebuffer configuration.
1845 *
1846 * Called by the user via ioctl.
1847 *
1848 * Returns:
1849 * Zero on success, negative errno on failure.
1850 */
1851int drm_mode_getresources(struct drm_device *dev, void *data,
1852 struct drm_file *file_priv)
1853{
1854 struct drm_mode_card_res *card_res = data;
1855 struct list_head *lh;
1856 struct drm_framebuffer *fb;
1857 struct drm_connector *connector;
1858 struct drm_crtc *crtc;
1859 struct drm_encoder *encoder;
1860 int ret = 0;
1861 int connector_count = 0;
1862 int crtc_count = 0;
1863 int fb_count = 0;
1864 int encoder_count = 0;
1865 int copied = 0;
1866 uint32_t __user *fb_id;
1867 uint32_t __user *crtc_id;
1868 uint32_t __user *connector_id;
1869 uint32_t __user *encoder_id;
1870
1871 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1872 return -EINVAL;
1873
1874
1875 mutex_lock(&file_priv->fbs_lock);
1876 /*
1877 * For the non-control nodes we need to limit the list of resources
1878 * by IDs in the group list for this node
1879 */
1880 list_for_each(lh, &file_priv->fbs)
1881 fb_count++;
1882
1883 /* handle this in 4 parts */
1884 /* FBs */
1885 if (card_res->count_fbs >= fb_count) {
1886 copied = 0;
1887 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1888 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1889 if (put_user(fb->base.id, fb_id + copied)) {
1890 mutex_unlock(&file_priv->fbs_lock);
1891 return -EFAULT;
1892 }
1893 copied++;
1894 }
1895 }
1896 card_res->count_fbs = fb_count;
1897 mutex_unlock(&file_priv->fbs_lock);
1898
1899 /* mode_config.mutex protects the connector list against e.g. DP MST
1900 * connector hot-adding. CRTC/Plane lists are invariant. */
1901 mutex_lock(&dev->mode_config.mutex);
1902 drm_for_each_crtc(crtc, dev)
1903 crtc_count++;
1904
1905 drm_for_each_connector(connector, dev)
1906 connector_count++;
1907
1908 drm_for_each_encoder(encoder, dev)
1909 encoder_count++;
1910
1911 card_res->max_height = dev->mode_config.max_height;
1912 card_res->min_height = dev->mode_config.min_height;
1913 card_res->max_width = dev->mode_config.max_width;
1914 card_res->min_width = dev->mode_config.min_width;
1915
1916 /* CRTCs */
1917 if (card_res->count_crtcs >= crtc_count) {
1918 copied = 0;
1919 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1920 drm_for_each_crtc(crtc, dev) {
1921 DRM_DEBUG_KMS("[CRTC:%d:%s]\n",
1922 crtc->base.id, crtc->name);
1923 if (put_user(crtc->base.id, crtc_id + copied)) {
1924 ret = -EFAULT;
1925 goto out;
1926 }
1927 copied++;
1928 }
1929 }
1930 card_res->count_crtcs = crtc_count;
1931
1932 /* Encoders */
1933 if (card_res->count_encoders >= encoder_count) {
1934 copied = 0;
1935 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1936 drm_for_each_encoder(encoder, dev) {
1937 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1938 encoder->name);
1939 if (put_user(encoder->base.id, encoder_id +
1940 copied)) {
1941 ret = -EFAULT;
1942 goto out;
1943 }
1944 copied++;
1945 }
1946 }
1947 card_res->count_encoders = encoder_count;
1948
1949 /* Connectors */
1950 if (card_res->count_connectors >= connector_count) {
1951 copied = 0;
1952 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1953 drm_for_each_connector(connector, dev) {
1954 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1955 connector->base.id,
1956 connector->name);
1957 if (put_user(connector->base.id,
1958 connector_id + copied)) {
1959 ret = -EFAULT;
1960 goto out;
1961 }
1962 copied++;
1963 }
1964 }
1965 card_res->count_connectors = connector_count;
1966
1967 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1968 card_res->count_connectors, card_res->count_encoders);
1969
1970out:
1971 mutex_unlock(&dev->mode_config.mutex);
1972 return ret;
1973}
1974
1975/**
1976 * drm_mode_getcrtc - get CRTC configuration
1977 * @dev: drm device for the ioctl
1978 * @data: data pointer for the ioctl
1979 * @file_priv: drm file for the ioctl call
1980 *
1981 * Construct a CRTC configuration structure to return to the user.
1982 *
1983 * Called by the user via ioctl.
1984 *
1985 * Returns:
1986 * Zero on success, negative errno on failure.
1987 */
1988int drm_mode_getcrtc(struct drm_device *dev,
1989 void *data, struct drm_file *file_priv)
1990{
1991 struct drm_mode_crtc *crtc_resp = data;
1992 struct drm_crtc *crtc;
1993
1994 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1995 return -EINVAL;
1996
1997 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
1998 if (!crtc)
1999 return -ENOENT;
2000
2001 drm_modeset_lock_crtc(crtc, crtc->primary);
2002 crtc_resp->gamma_size = crtc->gamma_size;
2003 if (crtc->primary->fb)
2004 crtc_resp->fb_id = crtc->primary->fb->base.id;
2005 else
2006 crtc_resp->fb_id = 0;
2007
2008 if (crtc->state) {
2009 crtc_resp->x = crtc->primary->state->src_x >> 16;
2010 crtc_resp->y = crtc->primary->state->src_y >> 16;
2011 if (crtc->state->enable) {
2012 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
2013 crtc_resp->mode_valid = 1;
2014
2015 } else {
2016 crtc_resp->mode_valid = 0;
2017 }
2018 } else {
2019 crtc_resp->x = crtc->x;
2020 crtc_resp->y = crtc->y;
2021 if (crtc->enabled) {
2022 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
2023 crtc_resp->mode_valid = 1;
2024
2025 } else {
2026 crtc_resp->mode_valid = 0;
2027 }
2028 }
2029 drm_modeset_unlock_crtc(crtc);
2030
2031 return 0;
2032}
2033
2034static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2035 const struct drm_file *file_priv)
2036{
2037 /*
2038 * If user-space hasn't configured the driver to expose the stereo 3D
2039 * modes, don't expose them.
2040 */
2041 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2042 return false;
2043
2044 return true;
2045}
2046
2047static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2048{
2049 /* For atomic drivers only state objects are synchronously updated and
2050 * protected by modeset locks, so check those first. */
2051 if (connector->state)
2052 return connector->state->best_encoder;
2053 return connector->encoder;
2054}
2055
2056/* helper for getconnector and getproperties ioctls */
2057static int get_properties(struct drm_mode_object *obj, bool atomic,
2058 uint32_t __user *prop_ptr, uint64_t __user *prop_values,
2059 uint32_t *arg_count_props)
2060{
2061 int props_count;
2062 int i, ret, copied;
2063
2064 props_count = obj->properties->count;
2065 if (!atomic)
2066 props_count -= obj->properties->atomic_count;
2067
2068 if ((*arg_count_props >= props_count) && props_count) {
2069 for (i = 0, copied = 0; copied < props_count; i++) {
2070 struct drm_property *prop = obj->properties->properties[i];
2071 uint64_t val;
2072
2073 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
2074 continue;
2075
2076 ret = drm_object_property_get_value(obj, prop, &val);
2077 if (ret)
2078 return ret;
2079
2080 if (put_user(prop->base.id, prop_ptr + copied))
2081 return -EFAULT;
2082
2083 if (put_user(val, prop_values + copied))
2084 return -EFAULT;
2085
2086 copied++;
2087 }
2088 }
2089 *arg_count_props = props_count;
2090
2091 return 0;
2092}
2093
2094/**
2095 * drm_mode_getconnector - get connector configuration
2096 * @dev: drm device for the ioctl
2097 * @data: data pointer for the ioctl
2098 * @file_priv: drm file for the ioctl call
2099 *
2100 * Construct a connector configuration structure to return to the user.
2101 *
2102 * Called by the user via ioctl.
2103 *
2104 * Returns:
2105 * Zero on success, negative errno on failure.
2106 */
2107int drm_mode_getconnector(struct drm_device *dev, void *data,
2108 struct drm_file *file_priv)
2109{
2110 struct drm_mode_get_connector *out_resp = data;
2111 struct drm_connector *connector;
2112 struct drm_encoder *encoder;
2113 struct drm_display_mode *mode;
2114 int mode_count = 0;
2115 int encoders_count = 0;
2116 int ret = 0;
2117 int copied = 0;
2118 int i;
2119 struct drm_mode_modeinfo u_mode;
2120 struct drm_mode_modeinfo __user *mode_ptr;
2121 uint32_t __user *encoder_ptr;
2122
2123 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2124 return -EINVAL;
2125
2126 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2127
2128 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
2129
2130 mutex_lock(&dev->mode_config.mutex);
2131
2132 connector = drm_connector_find(dev, out_resp->connector_id);
2133 if (!connector) {
2134 ret = -ENOENT;
2135 goto out_unlock;
2136 }
2137
2138 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
2139 if (connector->encoder_ids[i] != 0)
2140 encoders_count++;
2141
2142 if (out_resp->count_modes == 0) {
2143 connector->funcs->fill_modes(connector,
2144 dev->mode_config.max_width,
2145 dev->mode_config.max_height);
2146 }
2147
2148 /* delayed so we get modes regardless of pre-fill_modes state */
2149 list_for_each_entry(mode, &connector->modes, head)
2150 if (drm_mode_expose_to_userspace(mode, file_priv))
2151 mode_count++;
2152
2153 out_resp->connector_id = connector->base.id;
2154 out_resp->connector_type = connector->connector_type;
2155 out_resp->connector_type_id = connector->connector_type_id;
2156 out_resp->mm_width = connector->display_info.width_mm;
2157 out_resp->mm_height = connector->display_info.height_mm;
2158 out_resp->subpixel = connector->display_info.subpixel_order;
2159 out_resp->connection = connector->status;
2160
2161 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2162 encoder = drm_connector_get_encoder(connector);
2163 if (encoder)
2164 out_resp->encoder_id = encoder->base.id;
2165 else
2166 out_resp->encoder_id = 0;
2167
2168 /*
2169 * This ioctl is called twice, once to determine how much space is
2170 * needed, and the 2nd time to fill it.
2171 */
2172 if ((out_resp->count_modes >= mode_count) && mode_count) {
2173 copied = 0;
2174 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2175 list_for_each_entry(mode, &connector->modes, head) {
2176 if (!drm_mode_expose_to_userspace(mode, file_priv))
2177 continue;
2178
2179 drm_mode_convert_to_umode(&u_mode, mode);
2180 if (copy_to_user(mode_ptr + copied,
2181 &u_mode, sizeof(u_mode))) {
2182 ret = -EFAULT;
2183 goto out;
2184 }
2185 copied++;
2186 }
2187 }
2188 out_resp->count_modes = mode_count;
2189
2190 ret = get_properties(&connector->base, file_priv->atomic,
2191 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2192 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2193 &out_resp->count_props);
2194 if (ret)
2195 goto out;
2196
2197 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2198 copied = 0;
2199 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2200 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2201 if (connector->encoder_ids[i] != 0) {
2202 if (put_user(connector->encoder_ids[i],
2203 encoder_ptr + copied)) {
2204 ret = -EFAULT;
2205 goto out;
2206 }
2207 copied++;
2208 }
2209 }
2210 }
2211 out_resp->count_encoders = encoders_count;
2212
2213out:
2214 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2215
2216out_unlock:
2217 mutex_unlock(&dev->mode_config.mutex);
2218
2219 return ret;
2220}
2221
2222static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
2223{
2224 struct drm_connector *connector;
2225 struct drm_device *dev = encoder->dev;
2226 bool uses_atomic = false;
2227
2228 /* For atomic drivers only state objects are synchronously updated and
2229 * protected by modeset locks, so check those first. */
2230 drm_for_each_connector(connector, dev) {
2231 if (!connector->state)
2232 continue;
2233
2234 uses_atomic = true;
2235
2236 if (connector->state->best_encoder != encoder)
2237 continue;
2238
2239 return connector->state->crtc;
2240 }
2241
2242 /* Don't return stale data (e.g. pending async disable). */
2243 if (uses_atomic)
2244 return NULL;
2245
2246 return encoder->crtc;
2247}
2248
2249/**
2250 * drm_mode_getencoder - get encoder configuration
2251 * @dev: drm device for the ioctl
2252 * @data: data pointer for the ioctl
2253 * @file_priv: drm file for the ioctl call
2254 *
2255 * Construct a encoder configuration structure to return to the user.
2256 *
2257 * Called by the user via ioctl.
2258 *
2259 * Returns:
2260 * Zero on success, negative errno on failure.
2261 */
2262int drm_mode_getencoder(struct drm_device *dev, void *data,
2263 struct drm_file *file_priv)
2264{
2265 struct drm_mode_get_encoder *enc_resp = data;
2266 struct drm_encoder *encoder;
2267 struct drm_crtc *crtc;
2268
2269 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2270 return -EINVAL;
2271
2272 encoder = drm_encoder_find(dev, enc_resp->encoder_id);
2273 if (!encoder)
2274 return -ENOENT;
2275
2276 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2277 crtc = drm_encoder_get_crtc(encoder);
2278 if (crtc)
2279 enc_resp->crtc_id = crtc->base.id;
2280 else
2281 enc_resp->crtc_id = 0;
2282 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2283
2284 enc_resp->encoder_type = encoder->encoder_type;
2285 enc_resp->encoder_id = encoder->base.id;
2286 enc_resp->possible_crtcs = encoder->possible_crtcs;
2287 enc_resp->possible_clones = encoder->possible_clones;
2288
2289 return 0;
2290}
2291
2292/**
2293 * drm_mode_getplane_res - enumerate all plane resources
2294 * @dev: DRM device
2295 * @data: ioctl data
2296 * @file_priv: DRM file info
2297 *
2298 * Construct a list of plane ids to return to the user.
2299 *
2300 * Called by the user via ioctl.
2301 *
2302 * Returns:
2303 * Zero on success, negative errno on failure.
2304 */
2305int drm_mode_getplane_res(struct drm_device *dev, void *data,
2306 struct drm_file *file_priv)
2307{
2308 struct drm_mode_get_plane_res *plane_resp = data;
2309 struct drm_mode_config *config;
2310 struct drm_plane *plane;
2311 uint32_t __user *plane_ptr;
2312 int copied = 0;
2313 unsigned num_planes;
2314
2315 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2316 return -EINVAL;
2317
2318 config = &dev->mode_config;
2319
2320 if (file_priv->universal_planes)
2321 num_planes = config->num_total_plane;
2322 else
2323 num_planes = config->num_overlay_plane;
2324
2325 /*
2326 * This ioctl is called twice, once to determine how much space is
2327 * needed, and the 2nd time to fill it.
2328 */
2329 if (num_planes &&
2330 (plane_resp->count_planes >= num_planes)) {
2331 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
2332
2333 /* Plane lists are invariant, no locking needed. */
2334 drm_for_each_plane(plane, dev) {
2335 /*
2336 * Unless userspace set the 'universal planes'
2337 * capability bit, only advertise overlays.
2338 */
2339 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2340 !file_priv->universal_planes)
2341 continue;
2342
2343 if (put_user(plane->base.id, plane_ptr + copied))
2344 return -EFAULT;
2345 copied++;
2346 }
2347 }
2348 plane_resp->count_planes = num_planes;
2349
2350 return 0;
2351}
2352
2353/**
2354 * drm_mode_getplane - get plane configuration
2355 * @dev: DRM device
2356 * @data: ioctl data
2357 * @file_priv: DRM file info
2358 *
2359 * Construct a plane configuration structure to return to the user.
2360 *
2361 * Called by the user via ioctl.
2362 *
2363 * Returns:
2364 * Zero on success, negative errno on failure.
2365 */
2366int drm_mode_getplane(struct drm_device *dev, void *data,
2367 struct drm_file *file_priv)
2368{
2369 struct drm_mode_get_plane *plane_resp = data;
2370 struct drm_plane *plane;
2371 uint32_t __user *format_ptr;
2372
2373 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2374 return -EINVAL;
2375
2376 plane = drm_plane_find(dev, plane_resp->plane_id);
2377 if (!plane)
2378 return -ENOENT;
2379
2380 drm_modeset_lock(&plane->mutex, NULL);
2381 if (plane->crtc)
2382 plane_resp->crtc_id = plane->crtc->base.id;
2383 else
2384 plane_resp->crtc_id = 0;
2385
2386 if (plane->fb)
2387 plane_resp->fb_id = plane->fb->base.id;
2388 else
2389 plane_resp->fb_id = 0;
2390 drm_modeset_unlock(&plane->mutex);
2391
2392 plane_resp->plane_id = plane->base.id;
2393 plane_resp->possible_crtcs = plane->possible_crtcs;
2394 plane_resp->gamma_size = 0;
2395
2396 /*
2397 * This ioctl is called twice, once to determine how much space is
2398 * needed, and the 2nd time to fill it.
2399 */
2400 if (plane->format_count &&
2401 (plane_resp->count_format_types >= plane->format_count)) {
2402 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
2403 if (copy_to_user(format_ptr,
2404 plane->format_types,
2405 sizeof(uint32_t) * plane->format_count)) {
2406 return -EFAULT;
2407 }
2408 }
2409 plane_resp->count_format_types = plane->format_count;
2410
2411 return 0;
2412}
2413
2414/**
2415 * drm_plane_check_pixel_format - Check if the plane supports the pixel format
2416 * @plane: plane to check for format support
2417 * @format: the pixel format
2418 *
2419 * Returns:
2420 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
2421 * otherwise.
2422 */
2423int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
2424{
2425 unsigned int i;
2426
2427 for (i = 0; i < plane->format_count; i++) {
2428 if (format == plane->format_types[i])
2429 return 0;
2430 }
2431
2432 return -EINVAL;
2433}
2434
2435static int check_src_coords(uint32_t src_x, uint32_t src_y,
2436 uint32_t src_w, uint32_t src_h,
2437 const struct drm_framebuffer *fb)
2438{
2439 unsigned int fb_width, fb_height;
2440
2441 fb_width = fb->width << 16;
2442 fb_height = fb->height << 16;
2443
2444 /* Make sure source coordinates are inside the fb. */
2445 if (src_w > fb_width ||
2446 src_x > fb_width - src_w ||
2447 src_h > fb_height ||
2448 src_y > fb_height - src_h) {
2449 DRM_DEBUG_KMS("Invalid source coordinates "
2450 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2451 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
2452 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
2453 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
2454 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
2455 return -ENOSPC;
2456 }
2457
2458 return 0;
2459}
2460
2461/*
2462 * setplane_internal - setplane handler for internal callers
2463 *
2464 * Note that we assume an extra reference has already been taken on fb. If the
2465 * update fails, this reference will be dropped before return; if it succeeds,
2466 * the previous framebuffer (if any) will be unreferenced instead.
2467 *
2468 * src_{x,y,w,h} are provided in 16.16 fixed point format
2469 */
2470static int __setplane_internal(struct drm_plane *plane,
2471 struct drm_crtc *crtc,
2472 struct drm_framebuffer *fb,
2473 int32_t crtc_x, int32_t crtc_y,
2474 uint32_t crtc_w, uint32_t crtc_h,
2475 /* src_{x,y,w,h} values are 16.16 fixed point */
2476 uint32_t src_x, uint32_t src_y,
2477 uint32_t src_w, uint32_t src_h)
2478{
2479 int ret = 0;
2480
2481 /* No fb means shut it down */
2482 if (!fb) {
2483 plane->old_fb = plane->fb;
2484 ret = plane->funcs->disable_plane(plane);
2485 if (!ret) {
2486 plane->crtc = NULL;
2487 plane->fb = NULL;
2488 } else {
2489 plane->old_fb = NULL;
2490 }
2491 goto out;
2492 }
2493
2494 /* Check whether this plane is usable on this CRTC */
2495 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
2496 DRM_DEBUG_KMS("Invalid crtc for plane\n");
2497 ret = -EINVAL;
2498 goto out;
2499 }
2500
2501 /* Check whether this plane supports the fb pixel format. */
2502 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
2503 if (ret) {
2504 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2505 drm_get_format_name(fb->pixel_format));
2506 goto out;
2507 }
2508
2509 /* Give drivers some help against integer overflows */
2510 if (crtc_w > INT_MAX ||
2511 crtc_x > INT_MAX - (int32_t) crtc_w ||
2512 crtc_h > INT_MAX ||
2513 crtc_y > INT_MAX - (int32_t) crtc_h) {
2514 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2515 crtc_w, crtc_h, crtc_x, crtc_y);
2516 ret = -ERANGE;
2517 goto out;
2518 }
2519
2520 ret = check_src_coords(src_x, src_y, src_w, src_h, fb);
2521 if (ret)
2522 goto out;
2523
2524 plane->old_fb = plane->fb;
2525 ret = plane->funcs->update_plane(plane, crtc, fb,
2526 crtc_x, crtc_y, crtc_w, crtc_h,
2527 src_x, src_y, src_w, src_h);
2528 if (!ret) {
2529 plane->crtc = crtc;
2530 plane->fb = fb;
2531 fb = NULL;
2532 } else {
2533 plane->old_fb = NULL;
2534 }
2535
2536out:
2537 if (fb)
2538 drm_framebuffer_unreference(fb);
2539 if (plane->old_fb)
2540 drm_framebuffer_unreference(plane->old_fb);
2541 plane->old_fb = NULL;
2542
2543 return ret;
2544}
2545
2546static int setplane_internal(struct drm_plane *plane,
2547 struct drm_crtc *crtc,
2548 struct drm_framebuffer *fb,
2549 int32_t crtc_x, int32_t crtc_y,
2550 uint32_t crtc_w, uint32_t crtc_h,
2551 /* src_{x,y,w,h} values are 16.16 fixed point */
2552 uint32_t src_x, uint32_t src_y,
2553 uint32_t src_w, uint32_t src_h)
2554{
2555 int ret;
2556
2557 drm_modeset_lock_all(plane->dev);
2558 ret = __setplane_internal(plane, crtc, fb,
2559 crtc_x, crtc_y, crtc_w, crtc_h,
2560 src_x, src_y, src_w, src_h);
2561 drm_modeset_unlock_all(plane->dev);
2562
2563 return ret;
2564}
2565
2566/**
2567 * drm_mode_setplane - configure a plane's configuration
2568 * @dev: DRM device
2569 * @data: ioctl data*
2570 * @file_priv: DRM file info
2571 *
2572 * Set plane configuration, including placement, fb, scaling, and other factors.
2573 * Or pass a NULL fb to disable (planes may be disabled without providing a
2574 * valid crtc).
2575 *
2576 * Returns:
2577 * Zero on success, negative errno on failure.
2578 */
2579int drm_mode_setplane(struct drm_device *dev, void *data,
2580 struct drm_file *file_priv)
2581{
2582 struct drm_mode_set_plane *plane_req = data;
2583 struct drm_plane *plane;
2584 struct drm_crtc *crtc = NULL;
2585 struct drm_framebuffer *fb = NULL;
2586
2587 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2588 return -EINVAL;
2589
2590 /*
2591 * First, find the plane, crtc, and fb objects. If not available,
2592 * we don't bother to call the driver.
2593 */
2594 plane = drm_plane_find(dev, plane_req->plane_id);
2595 if (!plane) {
2596 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2597 plane_req->plane_id);
2598 return -ENOENT;
2599 }
2600
2601 if (plane_req->fb_id) {
2602 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2603 if (!fb) {
2604 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2605 plane_req->fb_id);
2606 return -ENOENT;
2607 }
2608
2609 crtc = drm_crtc_find(dev, plane_req->crtc_id);
2610 if (!crtc) {
2611 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2612 plane_req->crtc_id);
2613 return -ENOENT;
2614 }
2615 }
2616
2617 /*
2618 * setplane_internal will take care of deref'ing either the old or new
2619 * framebuffer depending on success.
2620 */
2621 return setplane_internal(plane, crtc, fb,
2622 plane_req->crtc_x, plane_req->crtc_y,
2623 plane_req->crtc_w, plane_req->crtc_h,
2624 plane_req->src_x, plane_req->src_y,
2625 plane_req->src_w, plane_req->src_h);
2626}
2627
2628/**
2629 * drm_mode_set_config_internal - helper to call ->set_config
2630 * @set: modeset config to set
2631 *
2632 * This is a little helper to wrap internal calls to the ->set_config driver
2633 * interface. The only thing it adds is correct refcounting dance.
2634 *
2635 * Returns:
2636 * Zero on success, negative errno on failure.
2637 */
2638int drm_mode_set_config_internal(struct drm_mode_set *set)
2639{
2640 struct drm_crtc *crtc = set->crtc;
2641 struct drm_framebuffer *fb;
2642 struct drm_crtc *tmp;
2643 int ret;
2644
2645 /*
2646 * NOTE: ->set_config can also disable other crtcs (if we steal all
2647 * connectors from it), hence we need to refcount the fbs across all
2648 * crtcs. Atomic modeset will have saner semantics ...
2649 */
2650 drm_for_each_crtc(tmp, crtc->dev)
2651 tmp->primary->old_fb = tmp->primary->fb;
2652
2653 fb = set->fb;
2654
2655 ret = crtc->funcs->set_config(set);
2656 if (ret == 0) {
2657 crtc->primary->crtc = crtc;
2658 crtc->primary->fb = fb;
2659 }
2660
2661 drm_for_each_crtc(tmp, crtc->dev) {
2662 if (tmp->primary->fb)
2663 drm_framebuffer_reference(tmp->primary->fb);
2664 if (tmp->primary->old_fb)
2665 drm_framebuffer_unreference(tmp->primary->old_fb);
2666 tmp->primary->old_fb = NULL;
2667 }
2668
2669 return ret;
2670}
2671EXPORT_SYMBOL(drm_mode_set_config_internal);
2672
2673/**
2674 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
2675 * @mode: mode to query
2676 * @hdisplay: hdisplay value to fill in
2677 * @vdisplay: vdisplay value to fill in
2678 *
2679 * The vdisplay value will be doubled if the specified mode is a stereo mode of
2680 * the appropriate layout.
2681 */
2682void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
2683 int *hdisplay, int *vdisplay)
2684{
2685 struct drm_display_mode adjusted;
2686
2687 drm_mode_copy(&adjusted, mode);
2688 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
2689 *hdisplay = adjusted.crtc_hdisplay;
2690 *vdisplay = adjusted.crtc_vdisplay;
2691}
2692EXPORT_SYMBOL(drm_crtc_get_hv_timing);
2693
2694/**
2695 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2696 * CRTC viewport
2697 * @crtc: CRTC that framebuffer will be displayed on
2698 * @x: x panning
2699 * @y: y panning
2700 * @mode: mode that framebuffer will be displayed under
2701 * @fb: framebuffer to check size of
2702 */
2703int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2704 int x, int y,
2705 const struct drm_display_mode *mode,
2706 const struct drm_framebuffer *fb)
2707
2708{
2709 int hdisplay, vdisplay;
2710
2711 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
2712
2713 if (crtc->state &&
2714 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) |
2715 BIT(DRM_ROTATE_270)))
2716 swap(hdisplay, vdisplay);
2717
2718 return check_src_coords(x << 16, y << 16,
2719 hdisplay << 16, vdisplay << 16, fb);
2720}
2721EXPORT_SYMBOL(drm_crtc_check_viewport);
2722
2723/**
2724 * drm_mode_setcrtc - set CRTC configuration
2725 * @dev: drm device for the ioctl
2726 * @data: data pointer for the ioctl
2727 * @file_priv: drm file for the ioctl call
2728 *
2729 * Build a new CRTC configuration based on user request.
2730 *
2731 * Called by the user via ioctl.
2732 *
2733 * Returns:
2734 * Zero on success, negative errno on failure.
2735 */
2736int drm_mode_setcrtc(struct drm_device *dev, void *data,
2737 struct drm_file *file_priv)
2738{
2739 struct drm_mode_config *config = &dev->mode_config;
2740 struct drm_mode_crtc *crtc_req = data;
2741 struct drm_crtc *crtc;
2742 struct drm_connector **connector_set = NULL, *connector;
2743 struct drm_framebuffer *fb = NULL;
2744 struct drm_display_mode *mode = NULL;
2745 struct drm_mode_set set;
2746 uint32_t __user *set_connectors_ptr;
2747 int ret;
2748 int i;
2749
2750 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2751 return -EINVAL;
2752
2753 /*
2754 * Universal plane src offsets are only 16.16, prevent havoc for
2755 * drivers using universal plane code internally.
2756 */
2757 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
2758 return -ERANGE;
2759
2760 drm_modeset_lock_all(dev);
2761 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
2762 if (!crtc) {
2763 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2764 ret = -ENOENT;
2765 goto out;
2766 }
2767 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
2768
2769 if (crtc_req->mode_valid) {
2770 /* If we have a mode we need a framebuffer. */
2771 /* If we pass -1, set the mode with the currently bound fb */
2772 if (crtc_req->fb_id == -1) {
2773 if (!crtc->primary->fb) {
2774 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2775 ret = -EINVAL;
2776 goto out;
2777 }
2778 fb = crtc->primary->fb;
2779 /* Make refcounting symmetric with the lookup path. */
2780 drm_framebuffer_reference(fb);
2781 } else {
2782 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2783 if (!fb) {
2784 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2785 crtc_req->fb_id);
2786 ret = -ENOENT;
2787 goto out;
2788 }
2789 }
2790
2791 mode = drm_mode_create(dev);
2792 if (!mode) {
2793 ret = -ENOMEM;
2794 goto out;
2795 }
2796
2797 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
2798 if (ret) {
2799 DRM_DEBUG_KMS("Invalid mode\n");
2800 goto out;
2801 }
2802
2803 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2804
2805 /*
2806 * Check whether the primary plane supports the fb pixel format.
2807 * Drivers not implementing the universal planes API use a
2808 * default formats list provided by the DRM core which doesn't
2809 * match real hardware capabilities. Skip the check in that
2810 * case.
2811 */
2812 if (!crtc->primary->format_default) {
2813 ret = drm_plane_check_pixel_format(crtc->primary,
2814 fb->pixel_format);
2815 if (ret) {
2816 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2817 drm_get_format_name(fb->pixel_format));
2818 goto out;
2819 }
2820 }
2821
2822 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2823 mode, fb);
2824 if (ret)
2825 goto out;
2826
2827 }
2828
2829 if (crtc_req->count_connectors == 0 && mode) {
2830 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2831 ret = -EINVAL;
2832 goto out;
2833 }
2834
2835 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2836 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2837 crtc_req->count_connectors);
2838 ret = -EINVAL;
2839 goto out;
2840 }
2841
2842 if (crtc_req->count_connectors > 0) {
2843 u32 out_id;
2844
2845 /* Avoid unbounded kernel memory allocation */
2846 if (crtc_req->count_connectors > config->num_connector) {
2847 ret = -EINVAL;
2848 goto out;
2849 }
2850
2851 connector_set = kmalloc_array(crtc_req->count_connectors,
2852 sizeof(struct drm_connector *),
2853 GFP_KERNEL);
2854 if (!connector_set) {
2855 ret = -ENOMEM;
2856 goto out;
2857 }
2858
2859 for (i = 0; i < crtc_req->count_connectors; i++) {
2860 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2861 if (get_user(out_id, &set_connectors_ptr[i])) {
2862 ret = -EFAULT;
2863 goto out;
2864 }
2865
2866 connector = drm_connector_find(dev, out_id);
2867 if (!connector) {
2868 DRM_DEBUG_KMS("Connector id %d unknown\n",
2869 out_id);
2870 ret = -ENOENT;
2871 goto out;
2872 }
2873 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2874 connector->base.id,
2875 connector->name);
2876
2877 connector_set[i] = connector;
2878 }
2879 }
2880
2881 set.crtc = crtc;
2882 set.x = crtc_req->x;
2883 set.y = crtc_req->y;
2884 set.mode = mode;
2885 set.connectors = connector_set;
2886 set.num_connectors = crtc_req->count_connectors;
2887 set.fb = fb;
2888 ret = drm_mode_set_config_internal(&set);
2889
2890out:
2891 if (fb)
2892 drm_framebuffer_unreference(fb);
2893
2894 kfree(connector_set);
2895 drm_mode_destroy(dev, mode);
2896 drm_modeset_unlock_all(dev);
2897 return ret;
2898}
2899
2900/**
2901 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
2902 * universal plane handler call
2903 * @crtc: crtc to update cursor for
2904 * @req: data pointer for the ioctl
2905 * @file_priv: drm file for the ioctl call
2906 *
2907 * Legacy cursor ioctl's work directly with driver buffer handles. To
2908 * translate legacy ioctl calls into universal plane handler calls, we need to
2909 * wrap the native buffer handle in a drm_framebuffer.
2910 *
2911 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
2912 * buffer with a pitch of 4*width; the universal plane interface should be used
2913 * directly in cases where the hardware can support other buffer settings and
2914 * userspace wants to make use of these capabilities.
2915 *
2916 * Returns:
2917 * Zero on success, negative errno on failure.
2918 */
2919static int drm_mode_cursor_universal(struct drm_crtc *crtc,
2920 struct drm_mode_cursor2 *req,
2921 struct drm_file *file_priv)
2922{
2923 struct drm_device *dev = crtc->dev;
2924 struct drm_framebuffer *fb = NULL;
2925 struct drm_mode_fb_cmd2 fbreq = {
2926 .width = req->width,
2927 .height = req->height,
2928 .pixel_format = DRM_FORMAT_ARGB8888,
2929 .pitches = { req->width * 4 },
2930 .handles = { req->handle },
2931 };
2932 int32_t crtc_x, crtc_y;
2933 uint32_t crtc_w = 0, crtc_h = 0;
2934 uint32_t src_w = 0, src_h = 0;
2935 int ret = 0;
2936
2937 BUG_ON(!crtc->cursor);
2938 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
2939
2940 /*
2941 * Obtain fb we'll be using (either new or existing) and take an extra
2942 * reference to it if fb != null. setplane will take care of dropping
2943 * the reference if the plane update fails.
2944 */
2945 if (req->flags & DRM_MODE_CURSOR_BO) {
2946 if (req->handle) {
2947 fb = internal_framebuffer_create(dev, &fbreq, file_priv);
2948 if (IS_ERR(fb)) {
2949 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
2950 return PTR_ERR(fb);
2951 }
2952 } else {
2953 fb = NULL;
2954 }
2955 } else {
2956 fb = crtc->cursor->fb;
2957 if (fb)
2958 drm_framebuffer_reference(fb);
2959 }
2960
2961 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2962 crtc_x = req->x;
2963 crtc_y = req->y;
2964 } else {
2965 crtc_x = crtc->cursor_x;
2966 crtc_y = crtc->cursor_y;
2967 }
2968
2969 if (fb) {
2970 crtc_w = fb->width;
2971 crtc_h = fb->height;
2972 src_w = fb->width << 16;
2973 src_h = fb->height << 16;
2974 }
2975
2976 /*
2977 * setplane_internal will take care of deref'ing either the old or new
2978 * framebuffer depending on success.
2979 */
2980 ret = __setplane_internal(crtc->cursor, crtc, fb,
2981 crtc_x, crtc_y, crtc_w, crtc_h,
2982 0, 0, src_w, src_h);
2983
2984 /* Update successful; save new cursor position, if necessary */
2985 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
2986 crtc->cursor_x = req->x;
2987 crtc->cursor_y = req->y;
2988 }
2989
2990 return ret;
2991}
2992
2993static int drm_mode_cursor_common(struct drm_device *dev,
2994 struct drm_mode_cursor2 *req,
2995 struct drm_file *file_priv)
2996{
2997 struct drm_crtc *crtc;
2998 int ret = 0;
2999
3000 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3001 return -EINVAL;
3002
3003 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
3004 return -EINVAL;
3005
3006 crtc = drm_crtc_find(dev, req->crtc_id);
3007 if (!crtc) {
3008 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
3009 return -ENOENT;
3010 }
3011
3012 /*
3013 * If this crtc has a universal cursor plane, call that plane's update
3014 * handler rather than using legacy cursor handlers.
3015 */
3016 drm_modeset_lock_crtc(crtc, crtc->cursor);
3017 if (crtc->cursor) {
3018 ret = drm_mode_cursor_universal(crtc, req, file_priv);
3019 goto out;
3020 }
3021
3022 if (req->flags & DRM_MODE_CURSOR_BO) {
3023 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
3024 ret = -ENXIO;
3025 goto out;
3026 }
3027 /* Turns off the cursor if handle is 0 */
3028 if (crtc->funcs->cursor_set2)
3029 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
3030 req->width, req->height, req->hot_x, req->hot_y);
3031 else
3032 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
3033 req->width, req->height);
3034 }
3035
3036 if (req->flags & DRM_MODE_CURSOR_MOVE) {
3037 if (crtc->funcs->cursor_move) {
3038 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
3039 } else {
3040 ret = -EFAULT;
3041 goto out;
3042 }
3043 }
3044out:
3045 drm_modeset_unlock_crtc(crtc);
3046
3047 return ret;
3048
3049}
3050
3051
3052/**
3053 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
3054 * @dev: drm device for the ioctl
3055 * @data: data pointer for the ioctl
3056 * @file_priv: drm file for the ioctl call
3057 *
3058 * Set the cursor configuration based on user request.
3059 *
3060 * Called by the user via ioctl.
3061 *
3062 * Returns:
3063 * Zero on success, negative errno on failure.
3064 */
3065int drm_mode_cursor_ioctl(struct drm_device *dev,
3066 void *data, struct drm_file *file_priv)
3067{
3068 struct drm_mode_cursor *req = data;
3069 struct drm_mode_cursor2 new_req;
3070
3071 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
3072 new_req.hot_x = new_req.hot_y = 0;
3073
3074 return drm_mode_cursor_common(dev, &new_req, file_priv);
3075}
3076
3077/**
3078 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
3079 * @dev: drm device for the ioctl
3080 * @data: data pointer for the ioctl
3081 * @file_priv: drm file for the ioctl call
3082 *
3083 * Set the cursor configuration based on user request. This implements the 2nd
3084 * version of the cursor ioctl, which allows userspace to additionally specify
3085 * the hotspot of the pointer.
3086 *
3087 * Called by the user via ioctl.
3088 *
3089 * Returns:
3090 * Zero on success, negative errno on failure.
3091 */
3092int drm_mode_cursor2_ioctl(struct drm_device *dev,
3093 void *data, struct drm_file *file_priv)
3094{
3095 struct drm_mode_cursor2 *req = data;
3096
3097 return drm_mode_cursor_common(dev, req, file_priv);
3098}
3099
3100/**
3101 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
3102 * @bpp: bits per pixels
3103 * @depth: bit depth per pixel
3104 *
3105 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
3106 * Useful in fbdev emulation code, since that deals in those values.
3107 */
3108uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
3109{
3110 uint32_t fmt;
3111
3112 switch (bpp) {
3113 case 8:
3114 fmt = DRM_FORMAT_C8;
3115 break;
3116 case 16:
3117 if (depth == 15)
3118 fmt = DRM_FORMAT_XRGB1555;
3119 else
3120 fmt = DRM_FORMAT_RGB565;
3121 break;
3122 case 24:
3123 fmt = DRM_FORMAT_RGB888;
3124 break;
3125 case 32:
3126 if (depth == 24)
3127 fmt = DRM_FORMAT_XRGB8888;
3128 else if (depth == 30)
3129 fmt = DRM_FORMAT_XRGB2101010;
3130 else
3131 fmt = DRM_FORMAT_ARGB8888;
3132 break;
3133 default:
3134 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
3135 fmt = DRM_FORMAT_XRGB8888;
3136 break;
3137 }
3138
3139 return fmt;
3140}
3141EXPORT_SYMBOL(drm_mode_legacy_fb_format);
3142
3143/**
3144 * drm_mode_addfb - add an FB to the graphics configuration
3145 * @dev: drm device for the ioctl
3146 * @data: data pointer for the ioctl
3147 * @file_priv: drm file for the ioctl call
3148 *
3149 * Add a new FB to the specified CRTC, given a user request. This is the
3150 * original addfb ioctl which only supported RGB formats.
3151 *
3152 * Called by the user via ioctl.
3153 *
3154 * Returns:
3155 * Zero on success, negative errno on failure.
3156 */
3157int drm_mode_addfb(struct drm_device *dev,
3158 void *data, struct drm_file *file_priv)
3159{
3160 struct drm_mode_fb_cmd *or = data;
3161 struct drm_mode_fb_cmd2 r = {};
3162 int ret;
3163
3164 /* convert to new format and call new ioctl */
3165 r.fb_id = or->fb_id;
3166 r.width = or->width;
3167 r.height = or->height;
3168 r.pitches[0] = or->pitch;
3169 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
3170 r.handles[0] = or->handle;
3171
3172 ret = drm_mode_addfb2(dev, &r, file_priv);
3173 if (ret)
3174 return ret;
3175
3176 or->fb_id = r.fb_id;
3177
3178 return 0;
3179}
3180
3181static int format_check(const struct drm_mode_fb_cmd2 *r)
3182{
3183 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
3184
3185 switch (format) {
3186 case DRM_FORMAT_C8:
3187 case DRM_FORMAT_RGB332:
3188 case DRM_FORMAT_BGR233:
3189 case DRM_FORMAT_XRGB4444:
3190 case DRM_FORMAT_XBGR4444:
3191 case DRM_FORMAT_RGBX4444:
3192 case DRM_FORMAT_BGRX4444:
3193 case DRM_FORMAT_ARGB4444:
3194 case DRM_FORMAT_ABGR4444:
3195 case DRM_FORMAT_RGBA4444:
3196 case DRM_FORMAT_BGRA4444:
3197 case DRM_FORMAT_XRGB1555:
3198 case DRM_FORMAT_XBGR1555:
3199 case DRM_FORMAT_RGBX5551:
3200 case DRM_FORMAT_BGRX5551:
3201 case DRM_FORMAT_ARGB1555:
3202 case DRM_FORMAT_ABGR1555:
3203 case DRM_FORMAT_RGBA5551:
3204 case DRM_FORMAT_BGRA5551:
3205 case DRM_FORMAT_RGB565:
3206 case DRM_FORMAT_BGR565:
3207 case DRM_FORMAT_RGB888:
3208 case DRM_FORMAT_BGR888:
3209 case DRM_FORMAT_XRGB8888:
3210 case DRM_FORMAT_XBGR8888:
3211 case DRM_FORMAT_RGBX8888:
3212 case DRM_FORMAT_BGRX8888:
3213 case DRM_FORMAT_ARGB8888:
3214 case DRM_FORMAT_ABGR8888:
3215 case DRM_FORMAT_RGBA8888:
3216 case DRM_FORMAT_BGRA8888:
3217 case DRM_FORMAT_XRGB2101010:
3218 case DRM_FORMAT_XBGR2101010:
3219 case DRM_FORMAT_RGBX1010102:
3220 case DRM_FORMAT_BGRX1010102:
3221 case DRM_FORMAT_ARGB2101010:
3222 case DRM_FORMAT_ABGR2101010:
3223 case DRM_FORMAT_RGBA1010102:
3224 case DRM_FORMAT_BGRA1010102:
3225 case DRM_FORMAT_YUYV:
3226 case DRM_FORMAT_YVYU:
3227 case DRM_FORMAT_UYVY:
3228 case DRM_FORMAT_VYUY:
3229 case DRM_FORMAT_AYUV:
3230 case DRM_FORMAT_NV12:
3231 case DRM_FORMAT_NV21:
3232 case DRM_FORMAT_NV16:
3233 case DRM_FORMAT_NV61:
3234 case DRM_FORMAT_NV24:
3235 case DRM_FORMAT_NV42:
3236 case DRM_FORMAT_YUV410:
3237 case DRM_FORMAT_YVU410:
3238 case DRM_FORMAT_YUV411:
3239 case DRM_FORMAT_YVU411:
3240 case DRM_FORMAT_YUV420:
3241 case DRM_FORMAT_YVU420:
3242 case DRM_FORMAT_YUV422:
3243 case DRM_FORMAT_YVU422:
3244 case DRM_FORMAT_YUV444:
3245 case DRM_FORMAT_YVU444:
3246 return 0;
3247 default:
3248 DRM_DEBUG_KMS("invalid pixel format %s\n",
3249 drm_get_format_name(r->pixel_format));
3250 return -EINVAL;
3251 }
3252}
3253
3254static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
3255{
3256 int ret, hsub, vsub, num_planes, i;
3257
3258 ret = format_check(r);
3259 if (ret) {
3260 DRM_DEBUG_KMS("bad framebuffer format %s\n",
3261 drm_get_format_name(r->pixel_format));
3262 return ret;
3263 }
3264
3265 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
3266 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
3267 num_planes = drm_format_num_planes(r->pixel_format);
3268
3269 if (r->width == 0 || r->width % hsub) {
3270 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
3271 return -EINVAL;
3272 }
3273
3274 if (r->height == 0 || r->height % vsub) {
3275 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
3276 return -EINVAL;
3277 }
3278
3279 for (i = 0; i < num_planes; i++) {
3280 unsigned int width = r->width / (i != 0 ? hsub : 1);
3281 unsigned int height = r->height / (i != 0 ? vsub : 1);
3282 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
3283
3284 if (!r->handles[i]) {
3285 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
3286 return -EINVAL;
3287 }
3288
3289 if ((uint64_t) width * cpp > UINT_MAX)
3290 return -ERANGE;
3291
3292 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
3293 return -ERANGE;
3294
3295 if (r->pitches[i] < width * cpp) {
3296 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
3297 return -EINVAL;
3298 }
3299
3300 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
3301 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
3302 r->modifier[i], i);
3303 return -EINVAL;
3304 }
3305
3306 /* modifier specific checks: */
3307 switch (r->modifier[i]) {
3308 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
3309 /* NOTE: the pitch restriction may be lifted later if it turns
3310 * out that no hw has this restriction:
3311 */
3312 if (r->pixel_format != DRM_FORMAT_NV12 ||
3313 width % 128 || height % 32 ||
3314 r->pitches[i] % 128) {
3315 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
3316 return -EINVAL;
3317 }
3318 break;
3319
3320 default:
3321 break;
3322 }
3323 }
3324
3325 for (i = num_planes; i < 4; i++) {
3326 if (r->modifier[i]) {
3327 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
3328 return -EINVAL;
3329 }
3330
3331 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
3332 if (!(r->flags & DRM_MODE_FB_MODIFIERS))
3333 continue;
3334
3335 if (r->handles[i]) {
3336 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
3337 return -EINVAL;
3338 }
3339
3340 if (r->pitches[i]) {
3341 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
3342 return -EINVAL;
3343 }
3344
3345 if (r->offsets[i]) {
3346 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
3347 return -EINVAL;
3348 }
3349 }
3350
3351 return 0;
3352}
3353
3354static struct drm_framebuffer *
3355internal_framebuffer_create(struct drm_device *dev,
3356 const struct drm_mode_fb_cmd2 *r,
3357 struct drm_file *file_priv)
3358{
3359 struct drm_mode_config *config = &dev->mode_config;
3360 struct drm_framebuffer *fb;
3361 int ret;
3362
3363 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
3364 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
3365 return ERR_PTR(-EINVAL);
3366 }
3367
3368 if ((config->min_width > r->width) || (r->width > config->max_width)) {
3369 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
3370 r->width, config->min_width, config->max_width);
3371 return ERR_PTR(-EINVAL);
3372 }
3373 if ((config->min_height > r->height) || (r->height > config->max_height)) {
3374 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
3375 r->height, config->min_height, config->max_height);
3376 return ERR_PTR(-EINVAL);
3377 }
3378
3379 if (r->flags & DRM_MODE_FB_MODIFIERS &&
3380 !dev->mode_config.allow_fb_modifiers) {
3381 DRM_DEBUG_KMS("driver does not support fb modifiers\n");
3382 return ERR_PTR(-EINVAL);
3383 }
3384
3385 ret = framebuffer_check(r);
3386 if (ret)
3387 return ERR_PTR(ret);
3388
3389 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
3390 if (IS_ERR(fb)) {
3391 DRM_DEBUG_KMS("could not create framebuffer\n");
3392 return fb;
3393 }
3394
3395 return fb;
3396}
3397
3398/**
3399 * drm_mode_addfb2 - add an FB to the graphics configuration
3400 * @dev: drm device for the ioctl
3401 * @data: data pointer for the ioctl
3402 * @file_priv: drm file for the ioctl call
3403 *
3404 * Add a new FB to the specified CRTC, given a user request with format. This is
3405 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
3406 * and uses fourcc codes as pixel format specifiers.
3407 *
3408 * Called by the user via ioctl.
3409 *
3410 * Returns:
3411 * Zero on success, negative errno on failure.
3412 */
3413int drm_mode_addfb2(struct drm_device *dev,
3414 void *data, struct drm_file *file_priv)
3415{
3416 struct drm_mode_fb_cmd2 *r = data;
3417 struct drm_framebuffer *fb;
3418
3419 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3420 return -EINVAL;
3421
3422 fb = internal_framebuffer_create(dev, r, file_priv);
3423 if (IS_ERR(fb))
3424 return PTR_ERR(fb);
3425
3426 /* Transfer ownership to the filp for reaping on close */
3427
3428 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
3429 mutex_lock(&file_priv->fbs_lock);
3430 r->fb_id = fb->base.id;
3431 list_add(&fb->filp_head, &file_priv->fbs);
3432 mutex_unlock(&file_priv->fbs_lock);
3433
3434 return 0;
3435}
3436
3437/**
3438 * drm_mode_rmfb - remove an FB from the configuration
3439 * @dev: drm device for the ioctl
3440 * @data: data pointer for the ioctl
3441 * @file_priv: drm file for the ioctl call
3442 *
3443 * Remove the FB specified by the user.
3444 *
3445 * Called by the user via ioctl.
3446 *
3447 * Returns:
3448 * Zero on success, negative errno on failure.
3449 */
3450int drm_mode_rmfb(struct drm_device *dev,
3451 void *data, struct drm_file *file_priv)
3452{
3453 struct drm_framebuffer *fb = NULL;
3454 struct drm_framebuffer *fbl = NULL;
3455 uint32_t *id = data;
3456 int found = 0;
3457
3458 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3459 return -EINVAL;
3460
3461 mutex_lock(&file_priv->fbs_lock);
3462 mutex_lock(&dev->mode_config.fb_lock);
3463 fb = __drm_framebuffer_lookup(dev, *id);
3464 if (!fb)
3465 goto fail_lookup;
3466
3467 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
3468 if (fb == fbl)
3469 found = 1;
3470 if (!found)
3471 goto fail_lookup;
3472
3473 list_del_init(&fb->filp_head);
3474 mutex_unlock(&dev->mode_config.fb_lock);
3475 mutex_unlock(&file_priv->fbs_lock);
3476
3477 drm_framebuffer_unreference(fb);
3478
3479 return 0;
3480
3481fail_lookup:
3482 mutex_unlock(&dev->mode_config.fb_lock);
3483 mutex_unlock(&file_priv->fbs_lock);
3484
3485 return -ENOENT;
3486}
3487
3488/**
3489 * drm_mode_getfb - get FB info
3490 * @dev: drm device for the ioctl
3491 * @data: data pointer for the ioctl
3492 * @file_priv: drm file for the ioctl call
3493 *
3494 * Lookup the FB given its ID and return info about it.
3495 *
3496 * Called by the user via ioctl.
3497 *
3498 * Returns:
3499 * Zero on success, negative errno on failure.
3500 */
3501int drm_mode_getfb(struct drm_device *dev,
3502 void *data, struct drm_file *file_priv)
3503{
3504 struct drm_mode_fb_cmd *r = data;
3505 struct drm_framebuffer *fb;
3506 int ret;
3507
3508 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3509 return -EINVAL;
3510
3511 fb = drm_framebuffer_lookup(dev, r->fb_id);
3512 if (!fb)
3513 return -ENOENT;
3514
3515 r->height = fb->height;
3516 r->width = fb->width;
3517 r->depth = fb->depth;
3518 r->bpp = fb->bits_per_pixel;
3519 r->pitch = fb->pitches[0];
3520 if (fb->funcs->create_handle) {
3521 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
3522 drm_is_control_client(file_priv)) {
3523 ret = fb->funcs->create_handle(fb, file_priv,
3524 &r->handle);
3525 } else {
3526 /* GET_FB() is an unprivileged ioctl so we must not
3527 * return a buffer-handle to non-master processes! For
3528 * backwards-compatibility reasons, we cannot make
3529 * GET_FB() privileged, so just return an invalid handle
3530 * for non-masters. */
3531 r->handle = 0;
3532 ret = 0;
3533 }
3534 } else {
3535 ret = -ENODEV;
3536 }
3537
3538 drm_framebuffer_unreference(fb);
3539
3540 return ret;
3541}
3542
3543/**
3544 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
3545 * @dev: drm device for the ioctl
3546 * @data: data pointer for the ioctl
3547 * @file_priv: drm file for the ioctl call
3548 *
3549 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
3550 * rectangle list. Generic userspace which does frontbuffer rendering must call
3551 * this ioctl to flush out the changes on manual-update display outputs, e.g.
3552 * usb display-link, mipi manual update panels or edp panel self refresh modes.
3553 *
3554 * Modesetting drivers which always update the frontbuffer do not need to
3555 * implement the corresponding ->dirty framebuffer callback.
3556 *
3557 * Called by the user via ioctl.
3558 *
3559 * Returns:
3560 * Zero on success, negative errno on failure.
3561 */
3562int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
3563 void *data, struct drm_file *file_priv)
3564{
3565 struct drm_clip_rect __user *clips_ptr;
3566 struct drm_clip_rect *clips = NULL;
3567 struct drm_mode_fb_dirty_cmd *r = data;
3568 struct drm_framebuffer *fb;
3569 unsigned flags;
3570 int num_clips;
3571 int ret;
3572
3573 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3574 return -EINVAL;
3575
3576 fb = drm_framebuffer_lookup(dev, r->fb_id);
3577 if (!fb)
3578 return -ENOENT;
3579
3580 num_clips = r->num_clips;
3581 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
3582
3583 if (!num_clips != !clips_ptr) {
3584 ret = -EINVAL;
3585 goto out_err1;
3586 }
3587
3588 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3589
3590 /* If userspace annotates copy, clips must come in pairs */
3591 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3592 ret = -EINVAL;
3593 goto out_err1;
3594 }
3595
3596 if (num_clips && clips_ptr) {
3597 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3598 ret = -EINVAL;
3599 goto out_err1;
3600 }
3601 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
3602 if (!clips) {
3603 ret = -ENOMEM;
3604 goto out_err1;
3605 }
3606
3607 ret = copy_from_user(clips, clips_ptr,
3608 num_clips * sizeof(*clips));
3609 if (ret) {
3610 ret = -EFAULT;
3611 goto out_err2;
3612 }
3613 }
3614
3615 if (fb->funcs->dirty) {
3616 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3617 clips, num_clips);
3618 } else {
3619 ret = -ENOSYS;
3620 }
3621
3622out_err2:
3623 kfree(clips);
3624out_err1:
3625 drm_framebuffer_unreference(fb);
3626
3627 return ret;
3628}
3629
3630
3631/**
3632 * drm_fb_release - remove and free the FBs on this file
3633 * @priv: drm file for the ioctl
3634 *
3635 * Destroy all the FBs associated with @filp.
3636 *
3637 * Called by the user via ioctl.
3638 *
3639 * Returns:
3640 * Zero on success, negative errno on failure.
3641 */
3642void drm_fb_release(struct drm_file *priv)
3643{
3644 struct drm_framebuffer *fb, *tfb;
3645
3646 /*
3647 * When the file gets released that means no one else can access the fb
3648 * list any more, so no need to grab fpriv->fbs_lock. And we need to
3649 * avoid upsetting lockdep since the universal cursor code adds a
3650 * framebuffer while holding mutex locks.
3651 *
3652 * Note that a real deadlock between fpriv->fbs_lock and the modeset
3653 * locks is impossible here since no one else but this function can get
3654 * at it any more.
3655 */
3656 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3657 list_del_init(&fb->filp_head);
3658
3659 /* This drops the fpriv->fbs reference. */
3660 drm_framebuffer_unreference(fb);
3661 }
3662}
3663
3664/**
3665 * drm_property_create - create a new property type
3666 * @dev: drm device
3667 * @flags: flags specifying the property type
3668 * @name: name of the property
3669 * @num_values: number of pre-defined values
3670 *
3671 * This creates a new generic drm property which can then be attached to a drm
3672 * object with drm_object_attach_property. The returned property object must be
3673 * freed with drm_property_destroy.
3674 *
3675 * Note that the DRM core keeps a per-device list of properties and that, if
3676 * drm_mode_config_cleanup() is called, it will destroy all properties created
3677 * by the driver.
3678 *
3679 * Returns:
3680 * A pointer to the newly created property on success, NULL on failure.
3681 */
3682struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3683 const char *name, int num_values)
3684{
3685 struct drm_property *property = NULL;
3686 int ret;
3687
3688 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3689 if (!property)
3690 return NULL;
3691
3692 property->dev = dev;
3693
3694 if (num_values) {
3695 property->values = kcalloc(num_values, sizeof(uint64_t),
3696 GFP_KERNEL);
3697 if (!property->values)
3698 goto fail;
3699 }
3700
3701 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3702 if (ret)
3703 goto fail;
3704
3705 property->flags = flags;
3706 property->num_values = num_values;
3707 INIT_LIST_HEAD(&property->enum_list);
3708
3709 if (name) {
3710 strncpy(property->name, name, DRM_PROP_NAME_LEN);
3711 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3712 }
3713
3714 list_add_tail(&property->head, &dev->mode_config.property_list);
3715
3716 WARN_ON(!drm_property_type_valid(property));
3717
3718 return property;
3719fail:
3720 kfree(property->values);
3721 kfree(property);
3722 return NULL;
3723}
3724EXPORT_SYMBOL(drm_property_create);
3725
3726/**
3727 * drm_property_create_enum - create a new enumeration property type
3728 * @dev: drm device
3729 * @flags: flags specifying the property type
3730 * @name: name of the property
3731 * @props: enumeration lists with property values
3732 * @num_values: number of pre-defined values
3733 *
3734 * This creates a new generic drm property which can then be attached to a drm
3735 * object with drm_object_attach_property. The returned property object must be
3736 * freed with drm_property_destroy.
3737 *
3738 * Userspace is only allowed to set one of the predefined values for enumeration
3739 * properties.
3740 *
3741 * Returns:
3742 * A pointer to the newly created property on success, NULL on failure.
3743 */
3744struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3745 const char *name,
3746 const struct drm_prop_enum_list *props,
3747 int num_values)
3748{
3749 struct drm_property *property;
3750 int i, ret;
3751
3752 flags |= DRM_MODE_PROP_ENUM;
3753
3754 property = drm_property_create(dev, flags, name, num_values);
3755 if (!property)
3756 return NULL;
3757
3758 for (i = 0; i < num_values; i++) {
3759 ret = drm_property_add_enum(property, i,
3760 props[i].type,
3761 props[i].name);
3762 if (ret) {
3763 drm_property_destroy(dev, property);
3764 return NULL;
3765 }
3766 }
3767
3768 return property;
3769}
3770EXPORT_SYMBOL(drm_property_create_enum);
3771
3772/**
3773 * drm_property_create_bitmask - create a new bitmask property type
3774 * @dev: drm device
3775 * @flags: flags specifying the property type
3776 * @name: name of the property
3777 * @props: enumeration lists with property bitflags
3778 * @num_props: size of the @props array
3779 * @supported_bits: bitmask of all supported enumeration values
3780 *
3781 * This creates a new bitmask drm property which can then be attached to a drm
3782 * object with drm_object_attach_property. The returned property object must be
3783 * freed with drm_property_destroy.
3784 *
3785 * Compared to plain enumeration properties userspace is allowed to set any
3786 * or'ed together combination of the predefined property bitflag values
3787 *
3788 * Returns:
3789 * A pointer to the newly created property on success, NULL on failure.
3790 */
3791struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3792 int flags, const char *name,
3793 const struct drm_prop_enum_list *props,
3794 int num_props,
3795 uint64_t supported_bits)
3796{
3797 struct drm_property *property;
3798 int i, ret, index = 0;
3799 int num_values = hweight64(supported_bits);
3800
3801 flags |= DRM_MODE_PROP_BITMASK;
3802
3803 property = drm_property_create(dev, flags, name, num_values);
3804 if (!property)
3805 return NULL;
3806 for (i = 0; i < num_props; i++) {
3807 if (!(supported_bits & (1ULL << props[i].type)))
3808 continue;
3809
3810 if (WARN_ON(index >= num_values)) {
3811 drm_property_destroy(dev, property);
3812 return NULL;
3813 }
3814
3815 ret = drm_property_add_enum(property, index++,
3816 props[i].type,
3817 props[i].name);
3818 if (ret) {
3819 drm_property_destroy(dev, property);
3820 return NULL;
3821 }
3822 }
3823
3824 return property;
3825}
3826EXPORT_SYMBOL(drm_property_create_bitmask);
3827
3828static struct drm_property *property_create_range(struct drm_device *dev,
3829 int flags, const char *name,
3830 uint64_t min, uint64_t max)
3831{
3832 struct drm_property *property;
3833
3834 property = drm_property_create(dev, flags, name, 2);
3835 if (!property)
3836 return NULL;
3837
3838 property->values[0] = min;
3839 property->values[1] = max;
3840
3841 return property;
3842}
3843
3844/**
3845 * drm_property_create_range - create a new unsigned ranged property type
3846 * @dev: drm device
3847 * @flags: flags specifying the property type
3848 * @name: name of the property
3849 * @min: minimum value of the property
3850 * @max: maximum value of the property
3851 *
3852 * This creates a new generic drm property which can then be attached to a drm
3853 * object with drm_object_attach_property. The returned property object must be
3854 * freed with drm_property_destroy.
3855 *
3856 * Userspace is allowed to set any unsigned integer value in the (min, max)
3857 * range inclusive.
3858 *
3859 * Returns:
3860 * A pointer to the newly created property on success, NULL on failure.
3861 */
3862struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3863 const char *name,
3864 uint64_t min, uint64_t max)
3865{
3866 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
3867 name, min, max);
3868}
3869EXPORT_SYMBOL(drm_property_create_range);
3870
3871/**
3872 * drm_property_create_signed_range - create a new signed ranged property type
3873 * @dev: drm device
3874 * @flags: flags specifying the property type
3875 * @name: name of the property
3876 * @min: minimum value of the property
3877 * @max: maximum value of the property
3878 *
3879 * This creates a new generic drm property which can then be attached to a drm
3880 * object with drm_object_attach_property. The returned property object must be
3881 * freed with drm_property_destroy.
3882 *
3883 * Userspace is allowed to set any signed integer value in the (min, max)
3884 * range inclusive.
3885 *
3886 * Returns:
3887 * A pointer to the newly created property on success, NULL on failure.
3888 */
3889struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
3890 int flags, const char *name,
3891 int64_t min, int64_t max)
3892{
3893 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
3894 name, I642U64(min), I642U64(max));
3895}
3896EXPORT_SYMBOL(drm_property_create_signed_range);
3897
3898/**
3899 * drm_property_create_object - create a new object property type
3900 * @dev: drm device
3901 * @flags: flags specifying the property type
3902 * @name: name of the property
3903 * @type: object type from DRM_MODE_OBJECT_* defines
3904 *
3905 * This creates a new generic drm property which can then be attached to a drm
3906 * object with drm_object_attach_property. The returned property object must be
3907 * freed with drm_property_destroy.
3908 *
3909 * Userspace is only allowed to set this to any property value of the given
3910 * @type. Only useful for atomic properties, which is enforced.
3911 *
3912 * Returns:
3913 * A pointer to the newly created property on success, NULL on failure.
3914 */
3915struct drm_property *drm_property_create_object(struct drm_device *dev,
3916 int flags, const char *name, uint32_t type)
3917{
3918 struct drm_property *property;
3919
3920 flags |= DRM_MODE_PROP_OBJECT;
3921
3922 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
3923 return NULL;
3924
3925 property = drm_property_create(dev, flags, name, 1);
3926 if (!property)
3927 return NULL;
3928
3929 property->values[0] = type;
3930
3931 return property;
3932}
3933EXPORT_SYMBOL(drm_property_create_object);
3934
3935/**
3936 * drm_property_create_bool - create a new boolean property type
3937 * @dev: drm device
3938 * @flags: flags specifying the property type
3939 * @name: name of the property
3940 *
3941 * This creates a new generic drm property which can then be attached to a drm
3942 * object with drm_object_attach_property. The returned property object must be
3943 * freed with drm_property_destroy.
3944 *
3945 * This is implemented as a ranged property with only {0, 1} as valid values.
3946 *
3947 * Returns:
3948 * A pointer to the newly created property on success, NULL on failure.
3949 */
3950struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
3951 const char *name)
3952{
3953 return drm_property_create_range(dev, flags, name, 0, 1);
3954}
3955EXPORT_SYMBOL(drm_property_create_bool);
3956
3957/**
3958 * drm_property_add_enum - add a possible value to an enumeration property
3959 * @property: enumeration property to change
3960 * @index: index of the new enumeration
3961 * @value: value of the new enumeration
3962 * @name: symbolic name of the new enumeration
3963 *
3964 * This functions adds enumerations to a property.
3965 *
3966 * It's use is deprecated, drivers should use one of the more specific helpers
3967 * to directly create the property with all enumerations already attached.
3968 *
3969 * Returns:
3970 * Zero on success, error code on failure.
3971 */
3972int drm_property_add_enum(struct drm_property *property, int index,
3973 uint64_t value, const char *name)
3974{
3975 struct drm_property_enum *prop_enum;
3976
3977 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
3978 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
3979 return -EINVAL;
3980
3981 /*
3982 * Bitmask enum properties have the additional constraint of values
3983 * from 0 to 63
3984 */
3985 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
3986 (value > 63))
3987 return -EINVAL;
3988
3989 if (!list_empty(&property->enum_list)) {
3990 list_for_each_entry(prop_enum, &property->enum_list, head) {
3991 if (prop_enum->value == value) {
3992 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3993 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3994 return 0;
3995 }
3996 }
3997 }
3998
3999 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
4000 if (!prop_enum)
4001 return -ENOMEM;
4002
4003 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
4004 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
4005 prop_enum->value = value;
4006
4007 property->values[index] = value;
4008 list_add_tail(&prop_enum->head, &property->enum_list);
4009 return 0;
4010}
4011EXPORT_SYMBOL(drm_property_add_enum);
4012
4013/**
4014 * drm_property_destroy - destroy a drm property
4015 * @dev: drm device
4016 * @property: property to destry
4017 *
4018 * This function frees a property including any attached resources like
4019 * enumeration values.
4020 */
4021void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
4022{
4023 struct drm_property_enum *prop_enum, *pt;
4024
4025 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
4026 list_del(&prop_enum->head);
4027 kfree(prop_enum);
4028 }
4029
4030 if (property->num_values)
4031 kfree(property->values);
4032 drm_mode_object_put(dev, &property->base);
4033 list_del(&property->head);
4034 kfree(property);
4035}
4036EXPORT_SYMBOL(drm_property_destroy);
4037
4038/**
4039 * drm_object_attach_property - attach a property to a modeset object
4040 * @obj: drm modeset object
4041 * @property: property to attach
4042 * @init_val: initial value of the property
4043 *
4044 * This attaches the given property to the modeset object with the given initial
4045 * value. Currently this function cannot fail since the properties are stored in
4046 * a statically sized array.
4047 */
4048void drm_object_attach_property(struct drm_mode_object *obj,
4049 struct drm_property *property,
4050 uint64_t init_val)
4051{
4052 int count = obj->properties->count;
4053
4054 if (count == DRM_OBJECT_MAX_PROPERTY) {
4055 WARN(1, "Failed to attach object property (type: 0x%x). Please "
4056 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
4057 "you see this message on the same object type.\n",
4058 obj->type);
4059 return;
4060 }
4061
4062 obj->properties->properties[count] = property;
4063 obj->properties->values[count] = init_val;
4064 obj->properties->count++;
4065 if (property->flags & DRM_MODE_PROP_ATOMIC)
4066 obj->properties->atomic_count++;
4067}
4068EXPORT_SYMBOL(drm_object_attach_property);
4069
4070/**
4071 * drm_object_property_set_value - set the value of a property
4072 * @obj: drm mode object to set property value for
4073 * @property: property to set
4074 * @val: value the property should be set to
4075 *
4076 * This functions sets a given property on a given object. This function only
4077 * changes the software state of the property, it does not call into the
4078 * driver's ->set_property callback.
4079 *
4080 * Returns:
4081 * Zero on success, error code on failure.
4082 */
4083int drm_object_property_set_value(struct drm_mode_object *obj,
4084 struct drm_property *property, uint64_t val)
4085{
4086 int i;
4087
4088 for (i = 0; i < obj->properties->count; i++) {
4089 if (obj->properties->properties[i] == property) {
4090 obj->properties->values[i] = val;
4091 return 0;
4092 }
4093 }
4094
4095 return -EINVAL;
4096}
4097EXPORT_SYMBOL(drm_object_property_set_value);
4098
4099/**
4100 * drm_object_property_get_value - retrieve the value of a property
4101 * @obj: drm mode object to get property value from
4102 * @property: property to retrieve
4103 * @val: storage for the property value
4104 *
4105 * This function retrieves the softare state of the given property for the given
4106 * property. Since there is no driver callback to retrieve the current property
4107 * value this might be out of sync with the hardware, depending upon the driver
4108 * and property.
4109 *
4110 * Returns:
4111 * Zero on success, error code on failure.
4112 */
4113int drm_object_property_get_value(struct drm_mode_object *obj,
4114 struct drm_property *property, uint64_t *val)
4115{
4116 int i;
4117
4118 /* read-only properties bypass atomic mechanism and still store
4119 * their value in obj->properties->values[].. mostly to avoid
4120 * having to deal w/ EDID and similar props in atomic paths:
4121 */
4122 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
4123 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
4124 return drm_atomic_get_property(obj, property, val);
4125
4126 for (i = 0; i < obj->properties->count; i++) {
4127 if (obj->properties->properties[i] == property) {
4128 *val = obj->properties->values[i];
4129 return 0;
4130 }
4131 }
4132
4133 return -EINVAL;
4134}
4135EXPORT_SYMBOL(drm_object_property_get_value);
4136
4137/**
4138 * drm_mode_getproperty_ioctl - get the property metadata
4139 * @dev: DRM device
4140 * @data: ioctl data
4141 * @file_priv: DRM file info
4142 *
4143 * This function retrieves the metadata for a given property, like the different
4144 * possible values for an enum property or the limits for a range property.
4145 *
4146 * Blob properties are special
4147 *
4148 * Called by the user via ioctl.
4149 *
4150 * Returns:
4151 * Zero on success, negative errno on failure.
4152 */
4153int drm_mode_getproperty_ioctl(struct drm_device *dev,
4154 void *data, struct drm_file *file_priv)
4155{
4156 struct drm_mode_get_property *out_resp = data;
4157 struct drm_property *property;
4158 int enum_count = 0;
4159 int value_count = 0;
4160 int ret = 0, i;
4161 int copied;
4162 struct drm_property_enum *prop_enum;
4163 struct drm_mode_property_enum __user *enum_ptr;
4164 uint64_t __user *values_ptr;
4165
4166 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4167 return -EINVAL;
4168
4169 drm_modeset_lock_all(dev);
4170 property = drm_property_find(dev, out_resp->prop_id);
4171 if (!property) {
4172 ret = -ENOENT;
4173 goto done;
4174 }
4175
4176 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4177 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4178 list_for_each_entry(prop_enum, &property->enum_list, head)
4179 enum_count++;
4180 }
4181
4182 value_count = property->num_values;
4183
4184 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
4185 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
4186 out_resp->flags = property->flags;
4187
4188 if ((out_resp->count_values >= value_count) && value_count) {
4189 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
4190 for (i = 0; i < value_count; i++) {
4191 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
4192 ret = -EFAULT;
4193 goto done;
4194 }
4195 }
4196 }
4197 out_resp->count_values = value_count;
4198
4199 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4200 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4201 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
4202 copied = 0;
4203 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
4204 list_for_each_entry(prop_enum, &property->enum_list, head) {
4205
4206 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
4207 ret = -EFAULT;
4208 goto done;
4209 }
4210
4211 if (copy_to_user(&enum_ptr[copied].name,
4212 &prop_enum->name, DRM_PROP_NAME_LEN)) {
4213 ret = -EFAULT;
4214 goto done;
4215 }
4216 copied++;
4217 }
4218 }
4219 out_resp->count_enum_blobs = enum_count;
4220 }
4221
4222 /*
4223 * NOTE: The idea seems to have been to use this to read all the blob
4224 * property values. But nothing ever added them to the corresponding
4225 * list, userspace always used the special-purpose get_blob ioctl to
4226 * read the value for a blob property. It also doesn't make a lot of
4227 * sense to return values here when everything else is just metadata for
4228 * the property itself.
4229 */
4230 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4231 out_resp->count_enum_blobs = 0;
4232done:
4233 drm_modeset_unlock_all(dev);
4234 return ret;
4235}
4236
4237/**
4238 * drm_property_create_blob - Create new blob property
4239 *
4240 * Creates a new blob property for a specified DRM device, optionally
4241 * copying data.
4242 *
4243 * @dev: DRM device to create property for
4244 * @length: Length to allocate for blob data
4245 * @data: If specified, copies data into blob
4246 *
4247 * Returns:
4248 * New blob property with a single reference on success, or an ERR_PTR
4249 * value on failure.
4250 */
4251struct drm_property_blob *
4252drm_property_create_blob(struct drm_device *dev, size_t length,
4253 const void *data)
4254{
4255 struct drm_property_blob *blob;
4256 int ret;
4257
4258 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob))
4259 return ERR_PTR(-EINVAL);
4260
4261 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
4262 if (!blob)
4263 return ERR_PTR(-ENOMEM);
4264
4265 /* This must be explicitly initialised, so we can safely call list_del
4266 * on it in the removal handler, even if it isn't in a file list. */
4267 INIT_LIST_HEAD(&blob->head_file);
4268 blob->length = length;
4269 blob->dev = dev;
4270
4271 if (data)
4272 memcpy(blob->data, data, length);
4273
4274 mutex_lock(&dev->mode_config.blob_lock);
4275
4276 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
4277 if (ret) {
4278 kfree(blob);
4279 mutex_unlock(&dev->mode_config.blob_lock);
4280 return ERR_PTR(-EINVAL);
4281 }
4282
4283 kref_init(&blob->refcount);
4284
4285 list_add_tail(&blob->head_global,
4286 &dev->mode_config.property_blob_list);
4287
4288 mutex_unlock(&dev->mode_config.blob_lock);
4289
4290 return blob;
4291}
4292EXPORT_SYMBOL(drm_property_create_blob);
4293
4294/**
4295 * drm_property_free_blob - Blob property destructor
4296 *
4297 * Internal free function for blob properties; must not be used directly.
4298 *
4299 * @kref: Reference
4300 */
4301static void drm_property_free_blob(struct kref *kref)
4302{
4303 struct drm_property_blob *blob =
4304 container_of(kref, struct drm_property_blob, refcount);
4305
4306 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
4307
4308 list_del(&blob->head_global);
4309 list_del(&blob->head_file);
4310 drm_mode_object_put(blob->dev, &blob->base);
4311
4312 kfree(blob);
4313}
4314
4315/**
4316 * drm_property_unreference_blob - Unreference a blob property
4317 *
4318 * Drop a reference on a blob property. May free the object.
4319 *
4320 * @blob: Pointer to blob property
4321 */
4322void drm_property_unreference_blob(struct drm_property_blob *blob)
4323{
4324 struct drm_device *dev;
4325
4326 if (!blob)
4327 return;
4328
4329 dev = blob->dev;
4330
4331 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4332
4333 if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
4334 &dev->mode_config.blob_lock))
4335 mutex_unlock(&dev->mode_config.blob_lock);
4336 else
4337 might_lock(&dev->mode_config.blob_lock);
4338}
4339EXPORT_SYMBOL(drm_property_unreference_blob);
4340
4341/**
4342 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
4343 *
4344 * Drop a reference on a blob property. May free the object. This must be
4345 * called with blob_lock held.
4346 *
4347 * @blob: Pointer to blob property
4348 */
4349static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
4350{
4351 if (!blob)
4352 return;
4353
4354 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4355
4356 kref_put(&blob->refcount, drm_property_free_blob);
4357}
4358
4359/**
4360 * drm_property_destroy_user_blobs - destroy all blobs created by this client
4361 * @dev: DRM device
4362 * @file_priv: destroy all blobs owned by this file handle
4363 */
4364void drm_property_destroy_user_blobs(struct drm_device *dev,
4365 struct drm_file *file_priv)
4366{
4367 struct drm_property_blob *blob, *bt;
4368
4369 mutex_lock(&dev->mode_config.blob_lock);
4370
4371 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
4372 list_del_init(&blob->head_file);
4373 drm_property_unreference_blob_locked(blob);
4374 }
4375
4376 mutex_unlock(&dev->mode_config.blob_lock);
4377}
4378
4379/**
4380 * drm_property_reference_blob - Take a reference on an existing property
4381 *
4382 * Take a new reference on an existing blob property.
4383 *
4384 * @blob: Pointer to blob property
4385 */
4386struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob)
4387{
4388 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4389 kref_get(&blob->refcount);
4390 return blob;
4391}
4392EXPORT_SYMBOL(drm_property_reference_blob);
4393
4394/*
4395 * Like drm_property_lookup_blob, but does not return an additional reference.
4396 * Must be called with blob_lock held.
4397 */
4398static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev,
4399 uint32_t id)
4400{
4401 struct drm_mode_object *obj = NULL;
4402 struct drm_property_blob *blob;
4403
4404 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
4405
4406 mutex_lock(&dev->mode_config.idr_mutex);
4407 obj = idr_find(&dev->mode_config.crtc_idr, id);
4408 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id))
4409 blob = NULL;
4410 else
4411 blob = obj_to_blob(obj);
4412 mutex_unlock(&dev->mode_config.idr_mutex);
4413
4414 return blob;
4415}
4416
4417/**
4418 * drm_property_lookup_blob - look up a blob property and take a reference
4419 * @dev: drm device
4420 * @id: id of the blob property
4421 *
4422 * If successful, this takes an additional reference to the blob property.
4423 * callers need to make sure to eventually unreference the returned property
4424 * again, using @drm_property_unreference_blob.
4425 */
4426struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
4427 uint32_t id)
4428{
4429 struct drm_property_blob *blob;
4430
4431 mutex_lock(&dev->mode_config.blob_lock);
4432 blob = __drm_property_lookup_blob(dev, id);
4433 if (blob) {
4434 if (!kref_get_unless_zero(&blob->refcount))
4435 blob = NULL;
4436 }
4437 mutex_unlock(&dev->mode_config.blob_lock);
4438
4439 return blob;
4440}
4441EXPORT_SYMBOL(drm_property_lookup_blob);
4442
4443/**
4444 * drm_property_replace_global_blob - atomically replace existing blob property
4445 * @dev: drm device
4446 * @replace: location of blob property pointer to be replaced
4447 * @length: length of data for new blob, or 0 for no data
4448 * @data: content for new blob, or NULL for no data
4449 * @obj_holds_id: optional object for property holding blob ID
4450 * @prop_holds_id: optional property holding blob ID
4451 * @return 0 on success or error on failure
4452 *
4453 * This function will atomically replace a global property in the blob list,
4454 * optionally updating a property which holds the ID of that property. It is
4455 * guaranteed to be atomic: no caller will be allowed to see intermediate
4456 * results, and either the entire operation will succeed and clean up the
4457 * previous property, or it will fail and the state will be unchanged.
4458 *
4459 * If length is 0 or data is NULL, no new blob will be created, and the holding
4460 * property, if specified, will be set to 0.
4461 *
4462 * Access to the replace pointer is assumed to be protected by the caller, e.g.
4463 * by holding the relevant modesetting object lock for its parent.
4464 *
4465 * For example, a drm_connector has a 'PATH' property, which contains the ID
4466 * of a blob property with the value of the MST path information. Calling this
4467 * function with replace pointing to the connector's path_blob_ptr, length and
4468 * data set for the new path information, obj_holds_id set to the connector's
4469 * base object, and prop_holds_id set to the path property name, will perform
4470 * a completely atomic update. The access to path_blob_ptr is protected by the
4471 * caller holding a lock on the connector.
4472 */
4473static int drm_property_replace_global_blob(struct drm_device *dev,
4474 struct drm_property_blob **replace,
4475 size_t length,
4476 const void *data,
4477 struct drm_mode_object *obj_holds_id,
4478 struct drm_property *prop_holds_id)
4479{
4480 struct drm_property_blob *new_blob = NULL;
4481 struct drm_property_blob *old_blob = NULL;
4482 int ret;
4483
4484 WARN_ON(replace == NULL);
4485
4486 old_blob = *replace;
4487
4488 if (length && data) {
4489 new_blob = drm_property_create_blob(dev, length, data);
4490 if (IS_ERR(new_blob))
4491 return PTR_ERR(new_blob);
4492 }
4493
4494 /* This does not need to be synchronised with blob_lock, as the
4495 * get_properties ioctl locks all modesetting objects, and
4496 * obj_holds_id must be locked before calling here, so we cannot
4497 * have its value out of sync with the list membership modified
4498 * below under blob_lock. */
4499 if (obj_holds_id) {
4500 ret = drm_object_property_set_value(obj_holds_id,
4501 prop_holds_id,
4502 new_blob ?
4503 new_blob->base.id : 0);
4504 if (ret != 0)
4505 goto err_created;
4506 }
4507
4508 drm_property_unreference_blob(old_blob);
4509 *replace = new_blob;
4510
4511 return 0;
4512
4513err_created:
4514 drm_property_unreference_blob(new_blob);
4515 return ret;
4516}
4517
4518/**
4519 * drm_mode_getblob_ioctl - get the contents of a blob property value
4520 * @dev: DRM device
4521 * @data: ioctl data
4522 * @file_priv: DRM file info
4523 *
4524 * This function retrieves the contents of a blob property. The value stored in
4525 * an object's blob property is just a normal modeset object id.
4526 *
4527 * Called by the user via ioctl.
4528 *
4529 * Returns:
4530 * Zero on success, negative errno on failure.
4531 */
4532int drm_mode_getblob_ioctl(struct drm_device *dev,
4533 void *data, struct drm_file *file_priv)
4534{
4535 struct drm_mode_get_blob *out_resp = data;
4536 struct drm_property_blob *blob;
4537 int ret = 0;
4538 void __user *blob_ptr;
4539
4540 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4541 return -EINVAL;
4542
4543 drm_modeset_lock_all(dev);
4544 mutex_lock(&dev->mode_config.blob_lock);
4545 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4546 if (!blob) {
4547 ret = -ENOENT;
4548 goto done;
4549 }
4550
4551 if (out_resp->length == blob->length) {
4552 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4553 if (copy_to_user(blob_ptr, blob->data, blob->length)) {
4554 ret = -EFAULT;
4555 goto done;
4556 }
4557 }
4558 out_resp->length = blob->length;
4559
4560done:
4561 mutex_unlock(&dev->mode_config.blob_lock);
4562 drm_modeset_unlock_all(dev);
4563 return ret;
4564}
4565
4566/**
4567 * drm_mode_createblob_ioctl - create a new blob property
4568 * @dev: DRM device
4569 * @data: ioctl data
4570 * @file_priv: DRM file info
4571 *
4572 * This function creates a new blob property with user-defined values. In order
4573 * to give us sensible validation and checking when creating, rather than at
4574 * every potential use, we also require a type to be provided upfront.
4575 *
4576 * Called by the user via ioctl.
4577 *
4578 * Returns:
4579 * Zero on success, negative errno on failure.
4580 */
4581int drm_mode_createblob_ioctl(struct drm_device *dev,
4582 void *data, struct drm_file *file_priv)
4583{
4584 struct drm_mode_create_blob *out_resp = data;
4585 struct drm_property_blob *blob;
4586 void __user *blob_ptr;
4587 int ret = 0;
4588
4589 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4590 return -EINVAL;
4591
4592 blob = drm_property_create_blob(dev, out_resp->length, NULL);
4593 if (IS_ERR(blob))
4594 return PTR_ERR(blob);
4595
4596 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4597 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) {
4598 ret = -EFAULT;
4599 goto out_blob;
4600 }
4601
4602 /* Dropping the lock between create_blob and our access here is safe
4603 * as only the same file_priv can remove the blob; at this point, it is
4604 * not associated with any file_priv. */
4605 mutex_lock(&dev->mode_config.blob_lock);
4606 out_resp->blob_id = blob->base.id;
4607 list_add_tail(&blob->head_file, &file_priv->blobs);
4608 mutex_unlock(&dev->mode_config.blob_lock);
4609
4610 return 0;
4611
4612out_blob:
4613 drm_property_unreference_blob(blob);
4614 return ret;
4615}
4616
4617/**
4618 * drm_mode_destroyblob_ioctl - destroy a user blob property
4619 * @dev: DRM device
4620 * @data: ioctl data
4621 * @file_priv: DRM file info
4622 *
4623 * Destroy an existing user-defined blob property.
4624 *
4625 * Called by the user via ioctl.
4626 *
4627 * Returns:
4628 * Zero on success, negative errno on failure.
4629 */
4630int drm_mode_destroyblob_ioctl(struct drm_device *dev,
4631 void *data, struct drm_file *file_priv)
4632{
4633 struct drm_mode_destroy_blob *out_resp = data;
4634 struct drm_property_blob *blob = NULL, *bt;
4635 bool found = false;
4636 int ret = 0;
4637
4638 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4639 return -EINVAL;
4640
4641 mutex_lock(&dev->mode_config.blob_lock);
4642 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4643 if (!blob) {
4644 ret = -ENOENT;
4645 goto err;
4646 }
4647
4648 /* Ensure the property was actually created by this user. */
4649 list_for_each_entry(bt, &file_priv->blobs, head_file) {
4650 if (bt == blob) {
4651 found = true;
4652 break;
4653 }
4654 }
4655
4656 if (!found) {
4657 ret = -EPERM;
4658 goto err;
4659 }
4660
4661 /* We must drop head_file here, because we may not be the last
4662 * reference on the blob. */
4663 list_del_init(&blob->head_file);
4664 drm_property_unreference_blob_locked(blob);
4665 mutex_unlock(&dev->mode_config.blob_lock);
4666
4667 return 0;
4668
4669err:
4670 mutex_unlock(&dev->mode_config.blob_lock);
4671 return ret;
4672}
4673
4674/**
4675 * drm_mode_connector_set_path_property - set tile property on connector
4676 * @connector: connector to set property on.
4677 * @path: path to use for property; must not be NULL.
4678 *
4679 * This creates a property to expose to userspace to specify a
4680 * connector path. This is mainly used for DisplayPort MST where
4681 * connectors have a topology and we want to allow userspace to give
4682 * them more meaningful names.
4683 *
4684 * Returns:
4685 * Zero on success, negative errno on failure.
4686 */
4687int drm_mode_connector_set_path_property(struct drm_connector *connector,
4688 const char *path)
4689{
4690 struct drm_device *dev = connector->dev;
4691 int ret;
4692
4693 ret = drm_property_replace_global_blob(dev,
4694 &connector->path_blob_ptr,
4695 strlen(path) + 1,
4696 path,
4697 &connector->base,
4698 dev->mode_config.path_property);
4699 return ret;
4700}
4701EXPORT_SYMBOL(drm_mode_connector_set_path_property);
4702
4703/**
4704 * drm_mode_connector_set_tile_property - set tile property on connector
4705 * @connector: connector to set property on.
4706 *
4707 * This looks up the tile information for a connector, and creates a
4708 * property for userspace to parse if it exists. The property is of
4709 * the form of 8 integers using ':' as a separator.
4710 *
4711 * Returns:
4712 * Zero on success, errno on failure.
4713 */
4714int drm_mode_connector_set_tile_property(struct drm_connector *connector)
4715{
4716 struct drm_device *dev = connector->dev;
4717 char tile[256];
4718 int ret;
4719
4720 if (!connector->has_tile) {
4721 ret = drm_property_replace_global_blob(dev,
4722 &connector->tile_blob_ptr,
4723 0,
4724 NULL,
4725 &connector->base,
4726 dev->mode_config.tile_property);
4727 return ret;
4728 }
4729
4730 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
4731 connector->tile_group->id, connector->tile_is_single_monitor,
4732 connector->num_h_tile, connector->num_v_tile,
4733 connector->tile_h_loc, connector->tile_v_loc,
4734 connector->tile_h_size, connector->tile_v_size);
4735
4736 ret = drm_property_replace_global_blob(dev,
4737 &connector->tile_blob_ptr,
4738 strlen(tile) + 1,
4739 tile,
4740 &connector->base,
4741 dev->mode_config.tile_property);
4742 return ret;
4743}
4744EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
4745
4746/**
4747 * drm_mode_connector_update_edid_property - update the edid property of a connector
4748 * @connector: drm connector
4749 * @edid: new value of the edid property
4750 *
4751 * This function creates a new blob modeset object and assigns its id to the
4752 * connector's edid property.
4753 *
4754 * Returns:
4755 * Zero on success, negative errno on failure.
4756 */
4757int drm_mode_connector_update_edid_property(struct drm_connector *connector,
4758 const struct edid *edid)
4759{
4760 struct drm_device *dev = connector->dev;
4761 size_t size = 0;
4762 int ret;
4763
4764 /* ignore requests to set edid when overridden */
4765 if (connector->override_edid)
4766 return 0;
4767
4768 if (edid)
4769 size = EDID_LENGTH * (1 + edid->extensions);
4770
4771 ret = drm_property_replace_global_blob(dev,
4772 &connector->edid_blob_ptr,
4773 size,
4774 edid,
4775 &connector->base,
4776 dev->mode_config.edid_property);
4777 return ret;
4778}
4779EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
4780
4781/* Some properties could refer to dynamic refcnt'd objects, or things that
4782 * need special locking to handle lifetime issues (ie. to ensure the prop
4783 * value doesn't become invalid part way through the property update due to
4784 * race). The value returned by reference via 'obj' should be passed back
4785 * to drm_property_change_valid_put() after the property is set (and the
4786 * object to which the property is attached has a chance to take it's own
4787 * reference).
4788 */
4789bool drm_property_change_valid_get(struct drm_property *property,
4790 uint64_t value, struct drm_mode_object **ref)
4791{
4792 int i;
4793
4794 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
4795 return false;
4796
4797 *ref = NULL;
4798
4799 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
4800 if (value < property->values[0] || value > property->values[1])
4801 return false;
4802 return true;
4803 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
4804 int64_t svalue = U642I64(value);
4805
4806 if (svalue < U642I64(property->values[0]) ||
4807 svalue > U642I64(property->values[1]))
4808 return false;
4809 return true;
4810 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4811 uint64_t valid_mask = 0;
4812
4813 for (i = 0; i < property->num_values; i++)
4814 valid_mask |= (1ULL << property->values[i]);
4815 return !(value & ~valid_mask);
4816 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
4817 struct drm_property_blob *blob;
4818
4819 if (value == 0)
4820 return true;
4821
4822 blob = drm_property_lookup_blob(property->dev, value);
4823 if (blob) {
4824 *ref = &blob->base;
4825 return true;
4826 } else {
4827 return false;
4828 }
4829 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4830 /* a zero value for an object property translates to null: */
4831 if (value == 0)
4832 return true;
4833
4834 /* handle refcnt'd objects specially: */
4835 if (property->values[0] == DRM_MODE_OBJECT_FB) {
4836 struct drm_framebuffer *fb;
4837 fb = drm_framebuffer_lookup(property->dev, value);
4838 if (fb) {
4839 *ref = &fb->base;
4840 return true;
4841 } else {
4842 return false;
4843 }
4844 } else {
4845 return _object_find(property->dev, value, property->values[0]) != NULL;
4846 }
4847 }
4848
4849 for (i = 0; i < property->num_values; i++)
4850 if (property->values[i] == value)
4851 return true;
4852 return false;
4853}
4854
4855void drm_property_change_valid_put(struct drm_property *property,
4856 struct drm_mode_object *ref)
4857{
4858 if (!ref)
4859 return;
4860
4861 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4862 if (property->values[0] == DRM_MODE_OBJECT_FB)
4863 drm_framebuffer_unreference(obj_to_fb(ref));
4864 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4865 drm_property_unreference_blob(obj_to_blob(ref));
4866}
4867
4868/**
4869 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
4870 * @dev: DRM device
4871 * @data: ioctl data
4872 * @file_priv: DRM file info
4873 *
4874 * This function sets the current value for a connectors's property. It also
4875 * calls into a driver's ->set_property callback to update the hardware state
4876 *
4877 * Called by the user via ioctl.
4878 *
4879 * Returns:
4880 * Zero on success, negative errno on failure.
4881 */
4882int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
4883 void *data, struct drm_file *file_priv)
4884{
4885 struct drm_mode_connector_set_property *conn_set_prop = data;
4886 struct drm_mode_obj_set_property obj_set_prop = {
4887 .value = conn_set_prop->value,
4888 .prop_id = conn_set_prop->prop_id,
4889 .obj_id = conn_set_prop->connector_id,
4890 .obj_type = DRM_MODE_OBJECT_CONNECTOR
4891 };
4892
4893 /* It does all the locking and checking we need */
4894 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
4895}
4896
4897static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
4898 struct drm_property *property,
4899 uint64_t value)
4900{
4901 int ret = -EINVAL;
4902 struct drm_connector *connector = obj_to_connector(obj);
4903
4904 /* Do DPMS ourselves */
4905 if (property == connector->dev->mode_config.dpms_property) {
4906 ret = (*connector->funcs->dpms)(connector, (int)value);
4907 } else if (connector->funcs->set_property)
4908 ret = connector->funcs->set_property(connector, property, value);
4909
4910 /* store the property value if successful */
4911 if (!ret)
4912 drm_object_property_set_value(&connector->base, property, value);
4913 return ret;
4914}
4915
4916static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
4917 struct drm_property *property,
4918 uint64_t value)
4919{
4920 int ret = -EINVAL;
4921 struct drm_crtc *crtc = obj_to_crtc(obj);
4922
4923 if (crtc->funcs->set_property)
4924 ret = crtc->funcs->set_property(crtc, property, value);
4925 if (!ret)
4926 drm_object_property_set_value(obj, property, value);
4927
4928 return ret;
4929}
4930
4931/**
4932 * drm_mode_plane_set_obj_prop - set the value of a property
4933 * @plane: drm plane object to set property value for
4934 * @property: property to set
4935 * @value: value the property should be set to
4936 *
4937 * This functions sets a given property on a given plane object. This function
4938 * calls the driver's ->set_property callback and changes the software state of
4939 * the property if the callback succeeds.
4940 *
4941 * Returns:
4942 * Zero on success, error code on failure.
4943 */
4944int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
4945 struct drm_property *property,
4946 uint64_t value)
4947{
4948 int ret = -EINVAL;
4949 struct drm_mode_object *obj = &plane->base;
4950
4951 if (plane->funcs->set_property)
4952 ret = plane->funcs->set_property(plane, property, value);
4953 if (!ret)
4954 drm_object_property_set_value(obj, property, value);
4955
4956 return ret;
4957}
4958EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
4959
4960/**
4961 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
4962 * @dev: DRM device
4963 * @data: ioctl data
4964 * @file_priv: DRM file info
4965 *
4966 * This function retrieves the current value for an object's property. Compared
4967 * to the connector specific ioctl this one is extended to also work on crtc and
4968 * plane objects.
4969 *
4970 * Called by the user via ioctl.
4971 *
4972 * Returns:
4973 * Zero on success, negative errno on failure.
4974 */
4975int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
4976 struct drm_file *file_priv)
4977{
4978 struct drm_mode_obj_get_properties *arg = data;
4979 struct drm_mode_object *obj;
4980 int ret = 0;
4981
4982 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4983 return -EINVAL;
4984
4985 drm_modeset_lock_all(dev);
4986
4987 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4988 if (!obj) {
4989 ret = -ENOENT;
4990 goto out;
4991 }
4992 if (!obj->properties) {
4993 ret = -EINVAL;
4994 goto out;
4995 }
4996
4997 ret = get_properties(obj, file_priv->atomic,
4998 (uint32_t __user *)(unsigned long)(arg->props_ptr),
4999 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
5000 &arg->count_props);
5001
5002out:
5003 drm_modeset_unlock_all(dev);
5004 return ret;
5005}
5006
5007/**
5008 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
5009 * @dev: DRM device
5010 * @data: ioctl data
5011 * @file_priv: DRM file info
5012 *
5013 * This function sets the current value for an object's property. It also calls
5014 * into a driver's ->set_property callback to update the hardware state.
5015 * Compared to the connector specific ioctl this one is extended to also work on
5016 * crtc and plane objects.
5017 *
5018 * Called by the user via ioctl.
5019 *
5020 * Returns:
5021 * Zero on success, negative errno on failure.
5022 */
5023int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
5024 struct drm_file *file_priv)
5025{
5026 struct drm_mode_obj_set_property *arg = data;
5027 struct drm_mode_object *arg_obj;
5028 struct drm_mode_object *prop_obj;
5029 struct drm_property *property;
5030 int i, ret = -EINVAL;
5031 struct drm_mode_object *ref;
5032
5033 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5034 return -EINVAL;
5035
5036 drm_modeset_lock_all(dev);
5037
5038 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
5039 if (!arg_obj) {
5040 ret = -ENOENT;
5041 goto out;
5042 }
5043 if (!arg_obj->properties)
5044 goto out;
5045
5046 for (i = 0; i < arg_obj->properties->count; i++)
5047 if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
5048 break;
5049
5050 if (i == arg_obj->properties->count)
5051 goto out;
5052
5053 prop_obj = drm_mode_object_find(dev, arg->prop_id,
5054 DRM_MODE_OBJECT_PROPERTY);
5055 if (!prop_obj) {
5056 ret = -ENOENT;
5057 goto out;
5058 }
5059 property = obj_to_property(prop_obj);
5060
5061 if (!drm_property_change_valid_get(property, arg->value, &ref))
5062 goto out;
5063
5064 switch (arg_obj->type) {
5065 case DRM_MODE_OBJECT_CONNECTOR:
5066 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
5067 arg->value);
5068 break;
5069 case DRM_MODE_OBJECT_CRTC:
5070 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
5071 break;
5072 case DRM_MODE_OBJECT_PLANE:
5073 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
5074 property, arg->value);
5075 break;
5076 }
5077
5078 drm_property_change_valid_put(property, ref);
5079
5080out:
5081 drm_modeset_unlock_all(dev);
5082 return ret;
5083}
5084
5085/**
5086 * drm_mode_connector_attach_encoder - attach a connector to an encoder
5087 * @connector: connector to attach
5088 * @encoder: encoder to attach @connector to
5089 *
5090 * This function links up a connector to an encoder. Note that the routing
5091 * restrictions between encoders and crtcs are exposed to userspace through the
5092 * possible_clones and possible_crtcs bitmasks.
5093 *
5094 * Returns:
5095 * Zero on success, negative errno on failure.
5096 */
5097int drm_mode_connector_attach_encoder(struct drm_connector *connector,
5098 struct drm_encoder *encoder)
5099{
5100 int i;
5101
5102 /*
5103 * In the past, drivers have attempted to model the static association
5104 * of connector to encoder in simple connector/encoder devices using a
5105 * direct assignment of connector->encoder = encoder. This connection
5106 * is a logical one and the responsibility of the core, so drivers are
5107 * expected not to mess with this.
5108 *
5109 * Note that the error return should've been enough here, but a large
5110 * majority of drivers ignores the return value, so add in a big WARN
5111 * to get people's attention.
5112 */
5113 if (WARN_ON(connector->encoder))
5114 return -EINVAL;
5115
5116 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
5117 if (connector->encoder_ids[i] == 0) {
5118 connector->encoder_ids[i] = encoder->base.id;
5119 return 0;
5120 }
5121 }
5122 return -ENOMEM;
5123}
5124EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
5125
5126/**
5127 * drm_mode_crtc_set_gamma_size - set the gamma table size
5128 * @crtc: CRTC to set the gamma table size for
5129 * @gamma_size: size of the gamma table
5130 *
5131 * Drivers which support gamma tables should set this to the supported gamma
5132 * table size when initializing the CRTC. Currently the drm core only supports a
5133 * fixed gamma table size.
5134 *
5135 * Returns:
5136 * Zero on success, negative errno on failure.
5137 */
5138int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
5139 int gamma_size)
5140{
5141 crtc->gamma_size = gamma_size;
5142
5143 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
5144 GFP_KERNEL);
5145 if (!crtc->gamma_store) {
5146 crtc->gamma_size = 0;
5147 return -ENOMEM;
5148 }
5149
5150 return 0;
5151}
5152EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
5153
5154/**
5155 * drm_mode_gamma_set_ioctl - set the gamma table
5156 * @dev: DRM device
5157 * @data: ioctl data
5158 * @file_priv: DRM file info
5159 *
5160 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
5161 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
5162 *
5163 * Called by the user via ioctl.
5164 *
5165 * Returns:
5166 * Zero on success, negative errno on failure.
5167 */
5168int drm_mode_gamma_set_ioctl(struct drm_device *dev,
5169 void *data, struct drm_file *file_priv)
5170{
5171 struct drm_mode_crtc_lut *crtc_lut = data;
5172 struct drm_crtc *crtc;
5173 void *r_base, *g_base, *b_base;
5174 int size;
5175 int ret = 0;
5176
5177 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5178 return -EINVAL;
5179
5180 drm_modeset_lock_all(dev);
5181 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5182 if (!crtc) {
5183 ret = -ENOENT;
5184 goto out;
5185 }
5186
5187 if (crtc->funcs->gamma_set == NULL) {
5188 ret = -ENOSYS;
5189 goto out;
5190 }
5191
5192 /* memcpy into gamma store */
5193 if (crtc_lut->gamma_size != crtc->gamma_size) {
5194 ret = -EINVAL;
5195 goto out;
5196 }
5197
5198 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5199 r_base = crtc->gamma_store;
5200 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
5201 ret = -EFAULT;
5202 goto out;
5203 }
5204
5205 g_base = r_base + size;
5206 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
5207 ret = -EFAULT;
5208 goto out;
5209 }
5210
5211 b_base = g_base + size;
5212 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
5213 ret = -EFAULT;
5214 goto out;
5215 }
5216
5217 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
5218
5219out:
5220 drm_modeset_unlock_all(dev);
5221 return ret;
5222
5223}
5224
5225/**
5226 * drm_mode_gamma_get_ioctl - get the gamma table
5227 * @dev: DRM device
5228 * @data: ioctl data
5229 * @file_priv: DRM file info
5230 *
5231 * Copy the current gamma table into the storage provided. This also provides
5232 * the gamma table size the driver expects, which can be used to size the
5233 * allocated storage.
5234 *
5235 * Called by the user via ioctl.
5236 *
5237 * Returns:
5238 * Zero on success, negative errno on failure.
5239 */
5240int drm_mode_gamma_get_ioctl(struct drm_device *dev,
5241 void *data, struct drm_file *file_priv)
5242{
5243 struct drm_mode_crtc_lut *crtc_lut = data;
5244 struct drm_crtc *crtc;
5245 void *r_base, *g_base, *b_base;
5246 int size;
5247 int ret = 0;
5248
5249 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5250 return -EINVAL;
5251
5252 drm_modeset_lock_all(dev);
5253 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5254 if (!crtc) {
5255 ret = -ENOENT;
5256 goto out;
5257 }
5258
5259 /* memcpy into gamma store */
5260 if (crtc_lut->gamma_size != crtc->gamma_size) {
5261 ret = -EINVAL;
5262 goto out;
5263 }
5264
5265 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5266 r_base = crtc->gamma_store;
5267 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
5268 ret = -EFAULT;
5269 goto out;
5270 }
5271
5272 g_base = r_base + size;
5273 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
5274 ret = -EFAULT;
5275 goto out;
5276 }
5277
5278 b_base = g_base + size;
5279 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
5280 ret = -EFAULT;
5281 goto out;
5282 }
5283out:
5284 drm_modeset_unlock_all(dev);
5285 return ret;
5286}
5287
5288/**
5289 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
5290 * @dev: DRM device
5291 * @data: ioctl data
5292 * @file_priv: DRM file info
5293 *
5294 * This schedules an asynchronous update on a given CRTC, called page flip.
5295 * Optionally a drm event is generated to signal the completion of the event.
5296 * Generic drivers cannot assume that a pageflip with changed framebuffer
5297 * properties (including driver specific metadata like tiling layout) will work,
5298 * but some drivers support e.g. pixel format changes through the pageflip
5299 * ioctl.
5300 *
5301 * Called by the user via ioctl.
5302 *
5303 * Returns:
5304 * Zero on success, negative errno on failure.
5305 */
5306int drm_mode_page_flip_ioctl(struct drm_device *dev,
5307 void *data, struct drm_file *file_priv)
5308{
5309 struct drm_mode_crtc_page_flip *page_flip = data;
5310 struct drm_crtc *crtc;
5311 struct drm_framebuffer *fb = NULL;
5312 struct drm_pending_vblank_event *e = NULL;
5313 int ret = -EINVAL;
5314
5315 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
5316 page_flip->reserved != 0)
5317 return -EINVAL;
5318
5319 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
5320 return -EINVAL;
5321
5322 crtc = drm_crtc_find(dev, page_flip->crtc_id);
5323 if (!crtc)
5324 return -ENOENT;
5325
5326 drm_modeset_lock_crtc(crtc, crtc->primary);
5327 if (crtc->primary->fb == NULL) {
5328 /* The framebuffer is currently unbound, presumably
5329 * due to a hotplug event, that userspace has not
5330 * yet discovered.
5331 */
5332 ret = -EBUSY;
5333 goto out;
5334 }
5335
5336 if (crtc->funcs->page_flip == NULL)
5337 goto out;
5338
5339 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
5340 if (!fb) {
5341 ret = -ENOENT;
5342 goto out;
5343 }
5344
5345 if (crtc->state) {
5346 const struct drm_plane_state *state = crtc->primary->state;
5347
5348 ret = check_src_coords(state->src_x, state->src_y,
5349 state->src_w, state->src_h, fb);
5350 } else {
5351 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
5352 }
5353 if (ret)
5354 goto out;
5355
5356 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
5357 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
5358 ret = -EINVAL;
5359 goto out;
5360 }
5361
5362 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5363 e = kzalloc(sizeof *e, GFP_KERNEL);
5364 if (!e) {
5365 ret = -ENOMEM;
5366 goto out;
5367 }
5368 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
5369 e->event.base.length = sizeof(e->event);
5370 e->event.user_data = page_flip->user_data;
5371 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
5372 if (ret) {
5373 kfree(e);
5374 goto out;
5375 }
5376 }
5377
5378 crtc->primary->old_fb = crtc->primary->fb;
5379 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
5380 if (ret) {
5381 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
5382 drm_event_cancel_free(dev, &e->base);
5383 /* Keep the old fb, don't unref it. */
5384 crtc->primary->old_fb = NULL;
5385 } else {
5386 crtc->primary->fb = fb;
5387 /* Unref only the old framebuffer. */
5388 fb = NULL;
5389 }
5390
5391out:
5392 if (fb)
5393 drm_framebuffer_unreference(fb);
5394 if (crtc->primary->old_fb)
5395 drm_framebuffer_unreference(crtc->primary->old_fb);
5396 crtc->primary->old_fb = NULL;
5397 drm_modeset_unlock_crtc(crtc);
5398
5399 return ret;
5400}
5401
5402/**
5403 * drm_mode_config_reset - call ->reset callbacks
5404 * @dev: drm device
5405 *
5406 * This functions calls all the crtc's, encoder's and connector's ->reset
5407 * callback. Drivers can use this in e.g. their driver load or resume code to
5408 * reset hardware and software state.
5409 */
5410void drm_mode_config_reset(struct drm_device *dev)
5411{
5412 struct drm_crtc *crtc;
5413 struct drm_plane *plane;
5414 struct drm_encoder *encoder;
5415 struct drm_connector *connector;
5416
5417 drm_for_each_plane(plane, dev)
5418 if (plane->funcs->reset)
5419 plane->funcs->reset(plane);
5420
5421 drm_for_each_crtc(crtc, dev)
5422 if (crtc->funcs->reset)
5423 crtc->funcs->reset(crtc);
5424
5425 drm_for_each_encoder(encoder, dev)
5426 if (encoder->funcs->reset)
5427 encoder->funcs->reset(encoder);
5428
5429 mutex_lock(&dev->mode_config.mutex);
5430 drm_for_each_connector(connector, dev)
5431 if (connector->funcs->reset)
5432 connector->funcs->reset(connector);
5433 mutex_unlock(&dev->mode_config.mutex);
5434}
5435EXPORT_SYMBOL(drm_mode_config_reset);
5436
5437/**
5438 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
5439 * @dev: DRM device
5440 * @data: ioctl data
5441 * @file_priv: DRM file info
5442 *
5443 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
5444 * TTM or something else entirely) and returns the resulting buffer handle. This
5445 * handle can then be wrapped up into a framebuffer modeset object.
5446 *
5447 * Note that userspace is not allowed to use such objects for render
5448 * acceleration - drivers must create their own private ioctls for such a use
5449 * case.
5450 *
5451 * Called by the user via ioctl.
5452 *
5453 * Returns:
5454 * Zero on success, negative errno on failure.
5455 */
5456int drm_mode_create_dumb_ioctl(struct drm_device *dev,
5457 void *data, struct drm_file *file_priv)
5458{
5459 struct drm_mode_create_dumb *args = data;
5460 u32 cpp, stride, size;
5461
5462 if (!dev->driver->dumb_create)
5463 return -ENOSYS;
5464 if (!args->width || !args->height || !args->bpp)
5465 return -EINVAL;
5466
5467 /* overflow checks for 32bit size calculations */
5468 /* NOTE: DIV_ROUND_UP() can overflow */
5469 cpp = DIV_ROUND_UP(args->bpp, 8);
5470 if (!cpp || cpp > 0xffffffffU / args->width)
5471 return -EINVAL;
5472 stride = cpp * args->width;
5473 if (args->height > 0xffffffffU / stride)
5474 return -EINVAL;
5475
5476 /* test for wrap-around */
5477 size = args->height * stride;
5478 if (PAGE_ALIGN(size) == 0)
5479 return -EINVAL;
5480
5481 /*
5482 * handle, pitch and size are output parameters. Zero them out to
5483 * prevent drivers from accidentally using uninitialized data. Since
5484 * not all existing userspace is clearing these fields properly we
5485 * cannot reject IOCTL with garbage in them.
5486 */
5487 args->handle = 0;
5488 args->pitch = 0;
5489 args->size = 0;
5490
5491 return dev->driver->dumb_create(file_priv, dev, args);
5492}
5493
5494/**
5495 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
5496 * @dev: DRM device
5497 * @data: ioctl data
5498 * @file_priv: DRM file info
5499 *
5500 * Allocate an offset in the drm device node's address space to be able to
5501 * memory map a dumb buffer.
5502 *
5503 * Called by the user via ioctl.
5504 *
5505 * Returns:
5506 * Zero on success, negative errno on failure.
5507 */
5508int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
5509 void *data, struct drm_file *file_priv)
5510{
5511 struct drm_mode_map_dumb *args = data;
5512
5513 /* call driver ioctl to get mmap offset */
5514 if (!dev->driver->dumb_map_offset)
5515 return -ENOSYS;
5516
5517 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
5518}
5519
5520/**
5521 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
5522 * @dev: DRM device
5523 * @data: ioctl data
5524 * @file_priv: DRM file info
5525 *
5526 * This destroys the userspace handle for the given dumb backing storage buffer.
5527 * Since buffer objects must be reference counted in the kernel a buffer object
5528 * won't be immediately freed if a framebuffer modeset object still uses it.
5529 *
5530 * Called by the user via ioctl.
5531 *
5532 * Returns:
5533 * Zero on success, negative errno on failure.
5534 */
5535int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
5536 void *data, struct drm_file *file_priv)
5537{
5538 struct drm_mode_destroy_dumb *args = data;
5539
5540 if (!dev->driver->dumb_destroy)
5541 return -ENOSYS;
5542
5543 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
5544}
5545
5546/**
5547 * drm_fb_get_bpp_depth - get the bpp/depth values for format
5548 * @format: pixel format (DRM_FORMAT_*)
5549 * @depth: storage for the depth value
5550 * @bpp: storage for the bpp value
5551 *
5552 * This only supports RGB formats here for compat with code that doesn't use
5553 * pixel formats directly yet.
5554 */
5555void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
5556 int *bpp)
5557{
5558 switch (format) {
5559 case DRM_FORMAT_C8:
5560 case DRM_FORMAT_RGB332:
5561 case DRM_FORMAT_BGR233:
5562 *depth = 8;
5563 *bpp = 8;
5564 break;
5565 case DRM_FORMAT_XRGB1555:
5566 case DRM_FORMAT_XBGR1555:
5567 case DRM_FORMAT_RGBX5551:
5568 case DRM_FORMAT_BGRX5551:
5569 case DRM_FORMAT_ARGB1555:
5570 case DRM_FORMAT_ABGR1555:
5571 case DRM_FORMAT_RGBA5551:
5572 case DRM_FORMAT_BGRA5551:
5573 *depth = 15;
5574 *bpp = 16;
5575 break;
5576 case DRM_FORMAT_RGB565:
5577 case DRM_FORMAT_BGR565:
5578 *depth = 16;
5579 *bpp = 16;
5580 break;
5581 case DRM_FORMAT_RGB888:
5582 case DRM_FORMAT_BGR888:
5583 *depth = 24;
5584 *bpp = 24;
5585 break;
5586 case DRM_FORMAT_XRGB8888:
5587 case DRM_FORMAT_XBGR8888:
5588 case DRM_FORMAT_RGBX8888:
5589 case DRM_FORMAT_BGRX8888:
5590 *depth = 24;
5591 *bpp = 32;
5592 break;
5593 case DRM_FORMAT_XRGB2101010:
5594 case DRM_FORMAT_XBGR2101010:
5595 case DRM_FORMAT_RGBX1010102:
5596 case DRM_FORMAT_BGRX1010102:
5597 case DRM_FORMAT_ARGB2101010:
5598 case DRM_FORMAT_ABGR2101010:
5599 case DRM_FORMAT_RGBA1010102:
5600 case DRM_FORMAT_BGRA1010102:
5601 *depth = 30;
5602 *bpp = 32;
5603 break;
5604 case DRM_FORMAT_ARGB8888:
5605 case DRM_FORMAT_ABGR8888:
5606 case DRM_FORMAT_RGBA8888:
5607 case DRM_FORMAT_BGRA8888:
5608 *depth = 32;
5609 *bpp = 32;
5610 break;
5611 default:
5612 DRM_DEBUG_KMS("unsupported pixel format %s\n",
5613 drm_get_format_name(format));
5614 *depth = 0;
5615 *bpp = 0;
5616 break;
5617 }
5618}
5619EXPORT_SYMBOL(drm_fb_get_bpp_depth);
5620
5621/**
5622 * drm_format_num_planes - get the number of planes for format
5623 * @format: pixel format (DRM_FORMAT_*)
5624 *
5625 * Returns:
5626 * The number of planes used by the specified pixel format.
5627 */
5628int drm_format_num_planes(uint32_t format)
5629{
5630 switch (format) {
5631 case DRM_FORMAT_YUV410:
5632 case DRM_FORMAT_YVU410:
5633 case DRM_FORMAT_YUV411:
5634 case DRM_FORMAT_YVU411:
5635 case DRM_FORMAT_YUV420:
5636 case DRM_FORMAT_YVU420:
5637 case DRM_FORMAT_YUV422:
5638 case DRM_FORMAT_YVU422:
5639 case DRM_FORMAT_YUV444:
5640 case DRM_FORMAT_YVU444:
5641 return 3;
5642 case DRM_FORMAT_NV12:
5643 case DRM_FORMAT_NV21:
5644 case DRM_FORMAT_NV16:
5645 case DRM_FORMAT_NV61:
5646 case DRM_FORMAT_NV24:
5647 case DRM_FORMAT_NV42:
5648 return 2;
5649 default:
5650 return 1;
5651 }
5652}
5653EXPORT_SYMBOL(drm_format_num_planes);
5654
5655/**
5656 * drm_format_plane_cpp - determine the bytes per pixel value
5657 * @format: pixel format (DRM_FORMAT_*)
5658 * @plane: plane index
5659 *
5660 * Returns:
5661 * The bytes per pixel value for the specified plane.
5662 */
5663int drm_format_plane_cpp(uint32_t format, int plane)
5664{
5665 unsigned int depth;
5666 int bpp;
5667
5668 if (plane >= drm_format_num_planes(format))
5669 return 0;
5670
5671 switch (format) {
5672 case DRM_FORMAT_YUYV:
5673 case DRM_FORMAT_YVYU:
5674 case DRM_FORMAT_UYVY:
5675 case DRM_FORMAT_VYUY:
5676 return 2;
5677 case DRM_FORMAT_NV12:
5678 case DRM_FORMAT_NV21:
5679 case DRM_FORMAT_NV16:
5680 case DRM_FORMAT_NV61:
5681 case DRM_FORMAT_NV24:
5682 case DRM_FORMAT_NV42:
5683 return plane ? 2 : 1;
5684 case DRM_FORMAT_YUV410:
5685 case DRM_FORMAT_YVU410:
5686 case DRM_FORMAT_YUV411:
5687 case DRM_FORMAT_YVU411:
5688 case DRM_FORMAT_YUV420:
5689 case DRM_FORMAT_YVU420:
5690 case DRM_FORMAT_YUV422:
5691 case DRM_FORMAT_YVU422:
5692 case DRM_FORMAT_YUV444:
5693 case DRM_FORMAT_YVU444:
5694 return 1;
5695 default:
5696 drm_fb_get_bpp_depth(format, &depth, &bpp);
5697 return bpp >> 3;
5698 }
5699}
5700EXPORT_SYMBOL(drm_format_plane_cpp);
5701
5702/**
5703 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
5704 * @format: pixel format (DRM_FORMAT_*)
5705 *
5706 * Returns:
5707 * The horizontal chroma subsampling factor for the
5708 * specified pixel format.
5709 */
5710int drm_format_horz_chroma_subsampling(uint32_t format)
5711{
5712 switch (format) {
5713 case DRM_FORMAT_YUV411:
5714 case DRM_FORMAT_YVU411:
5715 case DRM_FORMAT_YUV410:
5716 case DRM_FORMAT_YVU410:
5717 return 4;
5718 case DRM_FORMAT_YUYV:
5719 case DRM_FORMAT_YVYU:
5720 case DRM_FORMAT_UYVY:
5721 case DRM_FORMAT_VYUY:
5722 case DRM_FORMAT_NV12:
5723 case DRM_FORMAT_NV21:
5724 case DRM_FORMAT_NV16:
5725 case DRM_FORMAT_NV61:
5726 case DRM_FORMAT_YUV422:
5727 case DRM_FORMAT_YVU422:
5728 case DRM_FORMAT_YUV420:
5729 case DRM_FORMAT_YVU420:
5730 return 2;
5731 default:
5732 return 1;
5733 }
5734}
5735EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
5736
5737/**
5738 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
5739 * @format: pixel format (DRM_FORMAT_*)
5740 *
5741 * Returns:
5742 * The vertical chroma subsampling factor for the
5743 * specified pixel format.
5744 */
5745int drm_format_vert_chroma_subsampling(uint32_t format)
5746{
5747 switch (format) {
5748 case DRM_FORMAT_YUV410:
5749 case DRM_FORMAT_YVU410:
5750 return 4;
5751 case DRM_FORMAT_YUV420:
5752 case DRM_FORMAT_YVU420:
5753 case DRM_FORMAT_NV12:
5754 case DRM_FORMAT_NV21:
5755 return 2;
5756 default:
5757 return 1;
5758 }
5759}
5760EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
5761
5762/**
5763 * drm_format_plane_width - width of the plane given the first plane
5764 * @width: width of the first plane
5765 * @format: pixel format
5766 * @plane: plane index
5767 *
5768 * Returns:
5769 * The width of @plane, given that the width of the first plane is @width.
5770 */
5771int drm_format_plane_width(int width, uint32_t format, int plane)
5772{
5773 if (plane >= drm_format_num_planes(format))
5774 return 0;
5775
5776 if (plane == 0)
5777 return width;
5778
5779 return width / drm_format_horz_chroma_subsampling(format);
5780}
5781EXPORT_SYMBOL(drm_format_plane_width);
5782
5783/**
5784 * drm_format_plane_height - height of the plane given the first plane
5785 * @height: height of the first plane
5786 * @format: pixel format
5787 * @plane: plane index
5788 *
5789 * Returns:
5790 * The height of @plane, given that the height of the first plane is @height.
5791 */
5792int drm_format_plane_height(int height, uint32_t format, int plane)
5793{
5794 if (plane >= drm_format_num_planes(format))
5795 return 0;
5796
5797 if (plane == 0)
5798 return height;
5799
5800 return height / drm_format_vert_chroma_subsampling(format);
5801}
5802EXPORT_SYMBOL(drm_format_plane_height);
5803
5804/**
5805 * drm_rotation_simplify() - Try to simplify the rotation
5806 * @rotation: Rotation to be simplified
5807 * @supported_rotations: Supported rotations
5808 *
5809 * Attempt to simplify the rotation to a form that is supported.
5810 * Eg. if the hardware supports everything except DRM_REFLECT_X
5811 * one could call this function like this:
5812 *
5813 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
5814 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
5815 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
5816 *
5817 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
5818 * transforms the hardware supports, this function may not
5819 * be able to produce a supported transform, so the caller should
5820 * check the result afterwards.
5821 */
5822unsigned int drm_rotation_simplify(unsigned int rotation,
5823 unsigned int supported_rotations)
5824{
5825 if (rotation & ~supported_rotations) {
5826 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
5827 rotation = (rotation & DRM_REFLECT_MASK) |
5828 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4);
5829 }
5830
5831 return rotation;
5832}
5833EXPORT_SYMBOL(drm_rotation_simplify);
5834
5835/**
5836 * drm_mode_config_init - initialize DRM mode_configuration structure
5837 * @dev: DRM device
5838 *
5839 * Initialize @dev's mode_config structure, used for tracking the graphics
5840 * configuration of @dev.
5841 *
5842 * Since this initializes the modeset locks, no locking is possible. Which is no
5843 * problem, since this should happen single threaded at init time. It is the
5844 * driver's problem to ensure this guarantee.
5845 *
5846 */
5847void drm_mode_config_init(struct drm_device *dev)
5848{
5849 mutex_init(&dev->mode_config.mutex);
5850 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
5851 mutex_init(&dev->mode_config.idr_mutex);
5852 mutex_init(&dev->mode_config.fb_lock);
5853 mutex_init(&dev->mode_config.blob_lock);
5854 INIT_LIST_HEAD(&dev->mode_config.fb_list);
5855 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
5856 INIT_LIST_HEAD(&dev->mode_config.connector_list);
5857 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
5858 INIT_LIST_HEAD(&dev->mode_config.property_list);
5859 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
5860 INIT_LIST_HEAD(&dev->mode_config.plane_list);
5861 idr_init(&dev->mode_config.crtc_idr);
5862 idr_init(&dev->mode_config.tile_idr);
5863 ida_init(&dev->mode_config.connector_ida);
5864
5865 drm_modeset_lock_all(dev);
5866 drm_mode_create_standard_properties(dev);
5867 drm_modeset_unlock_all(dev);
5868
5869 /* Just to be sure */
5870 dev->mode_config.num_fb = 0;
5871 dev->mode_config.num_connector = 0;
5872 dev->mode_config.num_crtc = 0;
5873 dev->mode_config.num_encoder = 0;
5874 dev->mode_config.num_overlay_plane = 0;
5875 dev->mode_config.num_total_plane = 0;
5876}
5877EXPORT_SYMBOL(drm_mode_config_init);
5878
5879/**
5880 * drm_mode_config_cleanup - free up DRM mode_config info
5881 * @dev: DRM device
5882 *
5883 * Free up all the connectors and CRTCs associated with this DRM device, then
5884 * free up the framebuffers and associated buffer objects.
5885 *
5886 * Note that since this /should/ happen single-threaded at driver/device
5887 * teardown time, no locking is required. It's the driver's job to ensure that
5888 * this guarantee actually holds true.
5889 *
5890 * FIXME: cleanup any dangling user buffer objects too
5891 */
5892void drm_mode_config_cleanup(struct drm_device *dev)
5893{
5894 struct drm_connector *connector, *ot;
5895 struct drm_crtc *crtc, *ct;
5896 struct drm_encoder *encoder, *enct;
5897 struct drm_framebuffer *fb, *fbt;
5898 struct drm_property *property, *pt;
5899 struct drm_property_blob *blob, *bt;
5900 struct drm_plane *plane, *plt;
5901
5902 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
5903 head) {
5904 encoder->funcs->destroy(encoder);
5905 }
5906
5907 list_for_each_entry_safe(connector, ot,
5908 &dev->mode_config.connector_list, head) {
5909 connector->funcs->destroy(connector);
5910 }
5911
5912 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
5913 head) {
5914 drm_property_destroy(dev, property);
5915 }
5916
5917 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
5918 head_global) {
5919 drm_property_unreference_blob(blob);
5920 }
5921
5922 /*
5923 * Single-threaded teardown context, so it's not required to grab the
5924 * fb_lock to protect against concurrent fb_list access. Contrary, it
5925 * would actually deadlock with the drm_framebuffer_cleanup function.
5926 *
5927 * Also, if there are any framebuffers left, that's a driver leak now,
5928 * so politely WARN about this.
5929 */
5930 WARN_ON(!list_empty(&dev->mode_config.fb_list));
5931 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
5932 drm_framebuffer_free(&fb->refcount);
5933 }
5934
5935 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
5936 head) {
5937 plane->funcs->destroy(plane);
5938 }
5939
5940 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
5941 crtc->funcs->destroy(crtc);
5942 }
5943
5944 ida_destroy(&dev->mode_config.connector_ida);
5945 idr_destroy(&dev->mode_config.tile_idr);
5946 idr_destroy(&dev->mode_config.crtc_idr);
5947 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
5948}
5949EXPORT_SYMBOL(drm_mode_config_cleanup);
5950
5951struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
5952 unsigned int supported_rotations)
5953{
5954 static const struct drm_prop_enum_list props[] = {
5955 { DRM_ROTATE_0, "rotate-0" },
5956 { DRM_ROTATE_90, "rotate-90" },
5957 { DRM_ROTATE_180, "rotate-180" },
5958 { DRM_ROTATE_270, "rotate-270" },
5959 { DRM_REFLECT_X, "reflect-x" },
5960 { DRM_REFLECT_Y, "reflect-y" },
5961 };
5962
5963 return drm_property_create_bitmask(dev, 0, "rotation",
5964 props, ARRAY_SIZE(props),
5965 supported_rotations);
5966}
5967EXPORT_SYMBOL(drm_mode_create_rotation_property);
5968
5969/**
5970 * DOC: Tile group
5971 *
5972 * Tile groups are used to represent tiled monitors with a unique
5973 * integer identifier. Tiled monitors using DisplayID v1.3 have
5974 * a unique 8-byte handle, we store this in a tile group, so we
5975 * have a common identifier for all tiles in a monitor group.
5976 */
5977static void drm_tile_group_free(struct kref *kref)
5978{
5979 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
5980 struct drm_device *dev = tg->dev;
5981 mutex_lock(&dev->mode_config.idr_mutex);
5982 idr_remove(&dev->mode_config.tile_idr, tg->id);
5983 mutex_unlock(&dev->mode_config.idr_mutex);
5984 kfree(tg);
5985}
5986
5987/**
5988 * drm_mode_put_tile_group - drop a reference to a tile group.
5989 * @dev: DRM device
5990 * @tg: tile group to drop reference to.
5991 *
5992 * drop reference to tile group and free if 0.
5993 */
5994void drm_mode_put_tile_group(struct drm_device *dev,
5995 struct drm_tile_group *tg)
5996{
5997 kref_put(&tg->refcount, drm_tile_group_free);
5998}
5999
6000/**
6001 * drm_mode_get_tile_group - get a reference to an existing tile group
6002 * @dev: DRM device
6003 * @topology: 8-bytes unique per monitor.
6004 *
6005 * Use the unique bytes to get a reference to an existing tile group.
6006 *
6007 * RETURNS:
6008 * tile group or NULL if not found.
6009 */
6010struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
6011 char topology[8])
6012{
6013 struct drm_tile_group *tg;
6014 int id;
6015 mutex_lock(&dev->mode_config.idr_mutex);
6016 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
6017 if (!memcmp(tg->group_data, topology, 8)) {
6018 if (!kref_get_unless_zero(&tg->refcount))
6019 tg = NULL;
6020 mutex_unlock(&dev->mode_config.idr_mutex);
6021 return tg;
6022 }
6023 }
6024 mutex_unlock(&dev->mode_config.idr_mutex);
6025 return NULL;
6026}
6027EXPORT_SYMBOL(drm_mode_get_tile_group);
6028
6029/**
6030 * drm_mode_create_tile_group - create a tile group from a displayid description
6031 * @dev: DRM device
6032 * @topology: 8-bytes unique per monitor.
6033 *
6034 * Create a tile group for the unique monitor, and get a unique
6035 * identifier for the tile group.
6036 *
6037 * RETURNS:
6038 * new tile group or error.
6039 */
6040struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
6041 char topology[8])
6042{
6043 struct drm_tile_group *tg;
6044 int ret;
6045
6046 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
6047 if (!tg)
6048 return ERR_PTR(-ENOMEM);
6049
6050 kref_init(&tg->refcount);
6051 memcpy(tg->group_data, topology, 8);
6052 tg->dev = dev;
6053
6054 mutex_lock(&dev->mode_config.idr_mutex);
6055 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
6056 if (ret >= 0) {
6057 tg->id = ret;
6058 } else {
6059 kfree(tg);
6060 tg = ERR_PTR(ret);
6061 }
6062
6063 mutex_unlock(&dev->mode_config.idr_mutex);
6064 return tg;
6065}
6066EXPORT_SYMBOL(drm_mode_create_tile_group);
1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32#include <linux/ctype.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/export.h>
36#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
38#include <drm/drm_edid.h>
39#include <drm/drm_fourcc.h>
40
41#include "drm_crtc_internal.h"
42
43/**
44 * drm_modeset_lock_all - take all modeset locks
45 * @dev: drm device
46 *
47 * This function takes all modeset locks, suitable where a more fine-grained
48 * scheme isn't (yet) implemented. Locks must be dropped with
49 * drm_modeset_unlock_all.
50 */
51void drm_modeset_lock_all(struct drm_device *dev)
52{
53 struct drm_crtc *crtc;
54
55 mutex_lock(&dev->mode_config.mutex);
56
57 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
58 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
59}
60EXPORT_SYMBOL(drm_modeset_lock_all);
61
62/**
63 * drm_modeset_unlock_all - drop all modeset locks
64 * @dev: device
65 *
66 * This function drop all modeset locks taken by drm_modeset_lock_all.
67 */
68void drm_modeset_unlock_all(struct drm_device *dev)
69{
70 struct drm_crtc *crtc;
71
72 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
73 mutex_unlock(&crtc->mutex);
74
75 mutex_unlock(&dev->mode_config.mutex);
76}
77EXPORT_SYMBOL(drm_modeset_unlock_all);
78
79/**
80 * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
81 * @dev: device
82 *
83 * Useful as a debug assert.
84 */
85void drm_warn_on_modeset_not_all_locked(struct drm_device *dev)
86{
87 struct drm_crtc *crtc;
88
89 /* Locking is currently fubar in the panic handler. */
90 if (oops_in_progress)
91 return;
92
93 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
94 WARN_ON(!mutex_is_locked(&crtc->mutex));
95
96 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
97}
98EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
99
100/* Avoid boilerplate. I'm tired of typing. */
101#define DRM_ENUM_NAME_FN(fnname, list) \
102 const char *fnname(int val) \
103 { \
104 int i; \
105 for (i = 0; i < ARRAY_SIZE(list); i++) { \
106 if (list[i].type == val) \
107 return list[i].name; \
108 } \
109 return "(unknown)"; \
110 }
111
112/*
113 * Global properties
114 */
115static const struct drm_prop_enum_list drm_dpms_enum_list[] =
116{ { DRM_MODE_DPMS_ON, "On" },
117 { DRM_MODE_DPMS_STANDBY, "Standby" },
118 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
119 { DRM_MODE_DPMS_OFF, "Off" }
120};
121
122DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
123
124static const struct drm_prop_enum_list drm_plane_type_enum_list[] =
125{
126 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
127 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
128 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
129};
130
131/*
132 * Optional properties
133 */
134static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
135{
136 { DRM_MODE_SCALE_NONE, "None" },
137 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
138 { DRM_MODE_SCALE_CENTER, "Center" },
139 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
140};
141
142/*
143 * Non-global properties, but "required" for certain connectors.
144 */
145static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
146{
147 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
148 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
149 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
150};
151
152DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
153
154static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
155{
156 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
157 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
158 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
159};
160
161DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
162 drm_dvi_i_subconnector_enum_list)
163
164static const struct drm_prop_enum_list drm_tv_select_enum_list[] =
165{
166 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
167 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
168 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
169 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
170 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
171};
172
173DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
174
175static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
176{
177 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
178 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
179 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
180 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
181 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
182};
183
184DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
185 drm_tv_subconnector_enum_list)
186
187static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
188 { DRM_MODE_DIRTY_OFF, "Off" },
189 { DRM_MODE_DIRTY_ON, "On" },
190 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
191};
192
193struct drm_conn_prop_enum_list {
194 int type;
195 const char *name;
196 struct ida ida;
197};
198
199/*
200 * Connector and encoder types.
201 */
202static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
203{ { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
204 { DRM_MODE_CONNECTOR_VGA, "VGA" },
205 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
206 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
207 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
208 { DRM_MODE_CONNECTOR_Composite, "Composite" },
209 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
210 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
211 { DRM_MODE_CONNECTOR_Component, "Component" },
212 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
213 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
214 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
215 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
216 { DRM_MODE_CONNECTOR_TV, "TV" },
217 { DRM_MODE_CONNECTOR_eDP, "eDP" },
218 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
219 { DRM_MODE_CONNECTOR_DSI, "DSI" },
220};
221
222static const struct drm_prop_enum_list drm_encoder_enum_list[] =
223{ { DRM_MODE_ENCODER_NONE, "None" },
224 { DRM_MODE_ENCODER_DAC, "DAC" },
225 { DRM_MODE_ENCODER_TMDS, "TMDS" },
226 { DRM_MODE_ENCODER_LVDS, "LVDS" },
227 { DRM_MODE_ENCODER_TVDAC, "TV" },
228 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
229 { DRM_MODE_ENCODER_DSI, "DSI" },
230};
231
232static const struct drm_prop_enum_list drm_subpixel_enum_list[] =
233{
234 { SubPixelUnknown, "Unknown" },
235 { SubPixelHorizontalRGB, "Horizontal RGB" },
236 { SubPixelHorizontalBGR, "Horizontal BGR" },
237 { SubPixelVerticalRGB, "Vertical RGB" },
238 { SubPixelVerticalBGR, "Vertical BGR" },
239 { SubPixelNone, "None" },
240};
241
242void drm_connector_ida_init(void)
243{
244 int i;
245
246 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
247 ida_init(&drm_connector_enum_list[i].ida);
248}
249
250void drm_connector_ida_destroy(void)
251{
252 int i;
253
254 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
255 ida_destroy(&drm_connector_enum_list[i].ida);
256}
257
258/**
259 * drm_get_encoder_name - return a string for encoder
260 * @encoder: encoder to compute name of
261 *
262 * Note that the buffer used by this function is globally shared and owned by
263 * the function itself.
264 *
265 * FIXME: This isn't really multithreading safe.
266 */
267const char *drm_get_encoder_name(const struct drm_encoder *encoder)
268{
269 static char buf[32];
270
271 snprintf(buf, 32, "%s-%d",
272 drm_encoder_enum_list[encoder->encoder_type].name,
273 encoder->base.id);
274 return buf;
275}
276EXPORT_SYMBOL(drm_get_encoder_name);
277
278/**
279 * drm_get_connector_name - return a string for connector
280 * @connector: connector to compute name of
281 *
282 * Note that the buffer used by this function is globally shared and owned by
283 * the function itself.
284 *
285 * FIXME: This isn't really multithreading safe.
286 */
287const char *drm_get_connector_name(const struct drm_connector *connector)
288{
289 static char buf[32];
290
291 snprintf(buf, 32, "%s-%d",
292 drm_connector_enum_list[connector->connector_type].name,
293 connector->connector_type_id);
294 return buf;
295}
296EXPORT_SYMBOL(drm_get_connector_name);
297
298/**
299 * drm_get_connector_status_name - return a string for connector status
300 * @status: connector status to compute name of
301 *
302 * In contrast to the other drm_get_*_name functions this one here returns a
303 * const pointer and hence is threadsafe.
304 */
305const char *drm_get_connector_status_name(enum drm_connector_status status)
306{
307 if (status == connector_status_connected)
308 return "connected";
309 else if (status == connector_status_disconnected)
310 return "disconnected";
311 else
312 return "unknown";
313}
314EXPORT_SYMBOL(drm_get_connector_status_name);
315
316/**
317 * drm_get_subpixel_order_name - return a string for a given subpixel enum
318 * @order: enum of subpixel_order
319 *
320 * Note you could abuse this and return something out of bounds, but that
321 * would be a caller error. No unscrubbed user data should make it here.
322 */
323const char *drm_get_subpixel_order_name(enum subpixel_order order)
324{
325 return drm_subpixel_enum_list[order].name;
326}
327EXPORT_SYMBOL(drm_get_subpixel_order_name);
328
329static char printable_char(int c)
330{
331 return isascii(c) && isprint(c) ? c : '?';
332}
333
334/**
335 * drm_get_format_name - return a string for drm fourcc format
336 * @format: format to compute name of
337 *
338 * Note that the buffer used by this function is globally shared and owned by
339 * the function itself.
340 *
341 * FIXME: This isn't really multithreading safe.
342 */
343const char *drm_get_format_name(uint32_t format)
344{
345 static char buf[32];
346
347 snprintf(buf, sizeof(buf),
348 "%c%c%c%c %s-endian (0x%08x)",
349 printable_char(format & 0xff),
350 printable_char((format >> 8) & 0xff),
351 printable_char((format >> 16) & 0xff),
352 printable_char((format >> 24) & 0x7f),
353 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
354 format);
355
356 return buf;
357}
358EXPORT_SYMBOL(drm_get_format_name);
359
360/**
361 * drm_mode_object_get - allocate a new modeset identifier
362 * @dev: DRM device
363 * @obj: object pointer, used to generate unique ID
364 * @obj_type: object type
365 *
366 * Create a unique identifier based on @ptr in @dev's identifier space. Used
367 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
368 * modeset identifiers are _not_ reference counted. Hence don't use this for
369 * reference counted modeset objects like framebuffers.
370 *
371 * Returns:
372 * New unique (relative to other objects in @dev) integer identifier for the
373 * object.
374 */
375int drm_mode_object_get(struct drm_device *dev,
376 struct drm_mode_object *obj, uint32_t obj_type)
377{
378 int ret;
379
380 mutex_lock(&dev->mode_config.idr_mutex);
381 ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL);
382 if (ret >= 0) {
383 /*
384 * Set up the object linking under the protection of the idr
385 * lock so that other users can't see inconsistent state.
386 */
387 obj->id = ret;
388 obj->type = obj_type;
389 }
390 mutex_unlock(&dev->mode_config.idr_mutex);
391
392 return ret < 0 ? ret : 0;
393}
394
395/**
396 * drm_mode_object_put - free a modeset identifer
397 * @dev: DRM device
398 * @object: object to free
399 *
400 * Free @id from @dev's unique identifier pool. Note that despite the _get
401 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
402 * for reference counted modeset objects like framebuffers.
403 */
404void drm_mode_object_put(struct drm_device *dev,
405 struct drm_mode_object *object)
406{
407 mutex_lock(&dev->mode_config.idr_mutex);
408 idr_remove(&dev->mode_config.crtc_idr, object->id);
409 mutex_unlock(&dev->mode_config.idr_mutex);
410}
411
412/**
413 * drm_mode_object_find - look up a drm object with static lifetime
414 * @dev: drm device
415 * @id: id of the mode object
416 * @type: type of the mode object
417 *
418 * Note that framebuffers cannot be looked up with this functions - since those
419 * are reference counted, they need special treatment.
420 */
421struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
422 uint32_t id, uint32_t type)
423{
424 struct drm_mode_object *obj = NULL;
425
426 /* Framebuffers are reference counted and need their own lookup
427 * function.*/
428 WARN_ON(type == DRM_MODE_OBJECT_FB);
429
430 mutex_lock(&dev->mode_config.idr_mutex);
431 obj = idr_find(&dev->mode_config.crtc_idr, id);
432 if (!obj || (obj->type != type) || (obj->id != id))
433 obj = NULL;
434 mutex_unlock(&dev->mode_config.idr_mutex);
435
436 return obj;
437}
438EXPORT_SYMBOL(drm_mode_object_find);
439
440/**
441 * drm_framebuffer_init - initialize a framebuffer
442 * @dev: DRM device
443 * @fb: framebuffer to be initialized
444 * @funcs: ... with these functions
445 *
446 * Allocates an ID for the framebuffer's parent mode object, sets its mode
447 * functions & device file and adds it to the master fd list.
448 *
449 * IMPORTANT:
450 * This functions publishes the fb and makes it available for concurrent access
451 * by other users. Which means by this point the fb _must_ be fully set up -
452 * since all the fb attributes are invariant over its lifetime, no further
453 * locking but only correct reference counting is required.
454 *
455 * Returns:
456 * Zero on success, error code on failure.
457 */
458int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
459 const struct drm_framebuffer_funcs *funcs)
460{
461 int ret;
462
463 mutex_lock(&dev->mode_config.fb_lock);
464 kref_init(&fb->refcount);
465 INIT_LIST_HEAD(&fb->filp_head);
466 fb->dev = dev;
467 fb->funcs = funcs;
468
469 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
470 if (ret)
471 goto out;
472
473 /* Grab the idr reference. */
474 drm_framebuffer_reference(fb);
475
476 dev->mode_config.num_fb++;
477 list_add(&fb->head, &dev->mode_config.fb_list);
478out:
479 mutex_unlock(&dev->mode_config.fb_lock);
480
481 return 0;
482}
483EXPORT_SYMBOL(drm_framebuffer_init);
484
485static void drm_framebuffer_free(struct kref *kref)
486{
487 struct drm_framebuffer *fb =
488 container_of(kref, struct drm_framebuffer, refcount);
489 fb->funcs->destroy(fb);
490}
491
492static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
493 uint32_t id)
494{
495 struct drm_mode_object *obj = NULL;
496 struct drm_framebuffer *fb;
497
498 mutex_lock(&dev->mode_config.idr_mutex);
499 obj = idr_find(&dev->mode_config.crtc_idr, id);
500 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
501 fb = NULL;
502 else
503 fb = obj_to_fb(obj);
504 mutex_unlock(&dev->mode_config.idr_mutex);
505
506 return fb;
507}
508
509/**
510 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
511 * @dev: drm device
512 * @id: id of the fb object
513 *
514 * If successful, this grabs an additional reference to the framebuffer -
515 * callers need to make sure to eventually unreference the returned framebuffer
516 * again, using @drm_framebuffer_unreference.
517 */
518struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
519 uint32_t id)
520{
521 struct drm_framebuffer *fb;
522
523 mutex_lock(&dev->mode_config.fb_lock);
524 fb = __drm_framebuffer_lookup(dev, id);
525 if (fb)
526 drm_framebuffer_reference(fb);
527 mutex_unlock(&dev->mode_config.fb_lock);
528
529 return fb;
530}
531EXPORT_SYMBOL(drm_framebuffer_lookup);
532
533/**
534 * drm_framebuffer_unreference - unref a framebuffer
535 * @fb: framebuffer to unref
536 *
537 * This functions decrements the fb's refcount and frees it if it drops to zero.
538 */
539void drm_framebuffer_unreference(struct drm_framebuffer *fb)
540{
541 DRM_DEBUG("FB ID: %d\n", fb->base.id);
542 kref_put(&fb->refcount, drm_framebuffer_free);
543}
544EXPORT_SYMBOL(drm_framebuffer_unreference);
545
546/**
547 * drm_framebuffer_reference - incr the fb refcnt
548 * @fb: framebuffer
549 *
550 * This functions increments the fb's refcount.
551 */
552void drm_framebuffer_reference(struct drm_framebuffer *fb)
553{
554 DRM_DEBUG("FB ID: %d\n", fb->base.id);
555 kref_get(&fb->refcount);
556}
557EXPORT_SYMBOL(drm_framebuffer_reference);
558
559static void drm_framebuffer_free_bug(struct kref *kref)
560{
561 BUG();
562}
563
564static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
565{
566 DRM_DEBUG("FB ID: %d\n", fb->base.id);
567 kref_put(&fb->refcount, drm_framebuffer_free_bug);
568}
569
570/* dev->mode_config.fb_lock must be held! */
571static void __drm_framebuffer_unregister(struct drm_device *dev,
572 struct drm_framebuffer *fb)
573{
574 mutex_lock(&dev->mode_config.idr_mutex);
575 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
576 mutex_unlock(&dev->mode_config.idr_mutex);
577
578 fb->base.id = 0;
579
580 __drm_framebuffer_unreference(fb);
581}
582
583/**
584 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
585 * @fb: fb to unregister
586 *
587 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
588 * those used for fbdev. Note that the caller must hold a reference of it's own,
589 * i.e. the object may not be destroyed through this call (since it'll lead to a
590 * locking inversion).
591 */
592void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
593{
594 struct drm_device *dev = fb->dev;
595
596 mutex_lock(&dev->mode_config.fb_lock);
597 /* Mark fb as reaped and drop idr ref. */
598 __drm_framebuffer_unregister(dev, fb);
599 mutex_unlock(&dev->mode_config.fb_lock);
600}
601EXPORT_SYMBOL(drm_framebuffer_unregister_private);
602
603/**
604 * drm_framebuffer_cleanup - remove a framebuffer object
605 * @fb: framebuffer to remove
606 *
607 * Cleanup framebuffer. This function is intended to be used from the drivers
608 * ->destroy callback. It can also be used to clean up driver private
609 * framebuffers embedded into a larger structure.
610 *
611 * Note that this function does not remove the fb from active usuage - if it is
612 * still used anywhere, hilarity can ensue since userspace could call getfb on
613 * the id and get back -EINVAL. Obviously no concern at driver unload time.
614 *
615 * Also, the framebuffer will not be removed from the lookup idr - for
616 * user-created framebuffers this will happen in in the rmfb ioctl. For
617 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
618 * drm_framebuffer_unregister_private.
619 */
620void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
621{
622 struct drm_device *dev = fb->dev;
623
624 mutex_lock(&dev->mode_config.fb_lock);
625 list_del(&fb->head);
626 dev->mode_config.num_fb--;
627 mutex_unlock(&dev->mode_config.fb_lock);
628}
629EXPORT_SYMBOL(drm_framebuffer_cleanup);
630
631/**
632 * drm_framebuffer_remove - remove and unreference a framebuffer object
633 * @fb: framebuffer to remove
634 *
635 * Scans all the CRTCs and planes in @dev's mode_config. If they're
636 * using @fb, removes it, setting it to NULL. Then drops the reference to the
637 * passed-in framebuffer. Might take the modeset locks.
638 *
639 * Note that this function optimizes the cleanup away if the caller holds the
640 * last reference to the framebuffer. It is also guaranteed to not take the
641 * modeset locks in this case.
642 */
643void drm_framebuffer_remove(struct drm_framebuffer *fb)
644{
645 struct drm_device *dev = fb->dev;
646 struct drm_crtc *crtc;
647 struct drm_plane *plane;
648 struct drm_mode_set set;
649 int ret;
650
651 WARN_ON(!list_empty(&fb->filp_head));
652
653 /*
654 * drm ABI mandates that we remove any deleted framebuffers from active
655 * useage. But since most sane clients only remove framebuffers they no
656 * longer need, try to optimize this away.
657 *
658 * Since we're holding a reference ourselves, observing a refcount of 1
659 * means that we're the last holder and can skip it. Also, the refcount
660 * can never increase from 1 again, so we don't need any barriers or
661 * locks.
662 *
663 * Note that userspace could try to race with use and instate a new
664 * usage _after_ we've cleared all current ones. End result will be an
665 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
666 * in this manner.
667 */
668 if (atomic_read(&fb->refcount.refcount) > 1) {
669 drm_modeset_lock_all(dev);
670 /* remove from any CRTC */
671 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
672 if (crtc->primary->fb == fb) {
673 /* should turn off the crtc */
674 memset(&set, 0, sizeof(struct drm_mode_set));
675 set.crtc = crtc;
676 set.fb = NULL;
677 ret = drm_mode_set_config_internal(&set);
678 if (ret)
679 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
680 }
681 }
682
683 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
684 if (plane->fb == fb)
685 drm_plane_force_disable(plane);
686 }
687 drm_modeset_unlock_all(dev);
688 }
689
690 drm_framebuffer_unreference(fb);
691}
692EXPORT_SYMBOL(drm_framebuffer_remove);
693
694/**
695 * drm_crtc_init_with_planes - Initialise a new CRTC object with
696 * specified primary and cursor planes.
697 * @dev: DRM device
698 * @crtc: CRTC object to init
699 * @primary: Primary plane for CRTC
700 * @cursor: Cursor plane for CRTC
701 * @funcs: callbacks for the new CRTC
702 *
703 * Inits a new object created as base part of a driver crtc object.
704 *
705 * Returns:
706 * Zero on success, error code on failure.
707 */
708int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
709 struct drm_plane *primary,
710 void *cursor,
711 const struct drm_crtc_funcs *funcs)
712{
713 int ret;
714
715 crtc->dev = dev;
716 crtc->funcs = funcs;
717 crtc->invert_dimensions = false;
718
719 drm_modeset_lock_all(dev);
720 mutex_init(&crtc->mutex);
721 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
722
723 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
724 if (ret)
725 goto out;
726
727 crtc->base.properties = &crtc->properties;
728
729 list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
730 dev->mode_config.num_crtc++;
731
732 crtc->primary = primary;
733 if (primary)
734 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
735
736 out:
737 drm_modeset_unlock_all(dev);
738
739 return ret;
740}
741EXPORT_SYMBOL(drm_crtc_init_with_planes);
742
743/**
744 * drm_crtc_cleanup - Clean up the core crtc usage
745 * @crtc: CRTC to cleanup
746 *
747 * This function cleans up @crtc and removes it from the DRM mode setting
748 * core. Note that the function does *not* free the crtc structure itself,
749 * this is the responsibility of the caller.
750 */
751void drm_crtc_cleanup(struct drm_crtc *crtc)
752{
753 struct drm_device *dev = crtc->dev;
754
755 kfree(crtc->gamma_store);
756 crtc->gamma_store = NULL;
757
758 drm_mode_object_put(dev, &crtc->base);
759 list_del(&crtc->head);
760 dev->mode_config.num_crtc--;
761}
762EXPORT_SYMBOL(drm_crtc_cleanup);
763
764/**
765 * drm_crtc_index - find the index of a registered CRTC
766 * @crtc: CRTC to find index for
767 *
768 * Given a registered CRTC, return the index of that CRTC within a DRM
769 * device's list of CRTCs.
770 */
771unsigned int drm_crtc_index(struct drm_crtc *crtc)
772{
773 unsigned int index = 0;
774 struct drm_crtc *tmp;
775
776 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
777 if (tmp == crtc)
778 return index;
779
780 index++;
781 }
782
783 BUG();
784}
785EXPORT_SYMBOL(drm_crtc_index);
786
787/*
788 * drm_mode_remove - remove and free a mode
789 * @connector: connector list to modify
790 * @mode: mode to remove
791 *
792 * Remove @mode from @connector's mode list, then free it.
793 */
794static void drm_mode_remove(struct drm_connector *connector,
795 struct drm_display_mode *mode)
796{
797 list_del(&mode->head);
798 drm_mode_destroy(connector->dev, mode);
799}
800
801/**
802 * drm_connector_init - Init a preallocated connector
803 * @dev: DRM device
804 * @connector: the connector to init
805 * @funcs: callbacks for this connector
806 * @connector_type: user visible type of the connector
807 *
808 * Initialises a preallocated connector. Connectors should be
809 * subclassed as part of driver connector objects.
810 *
811 * Returns:
812 * Zero on success, error code on failure.
813 */
814int drm_connector_init(struct drm_device *dev,
815 struct drm_connector *connector,
816 const struct drm_connector_funcs *funcs,
817 int connector_type)
818{
819 int ret;
820 struct ida *connector_ida =
821 &drm_connector_enum_list[connector_type].ida;
822
823 drm_modeset_lock_all(dev);
824
825 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
826 if (ret)
827 goto out;
828
829 connector->base.properties = &connector->properties;
830 connector->dev = dev;
831 connector->funcs = funcs;
832 connector->connector_type = connector_type;
833 connector->connector_type_id =
834 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
835 if (connector->connector_type_id < 0) {
836 ret = connector->connector_type_id;
837 drm_mode_object_put(dev, &connector->base);
838 goto out;
839 }
840 INIT_LIST_HEAD(&connector->probed_modes);
841 INIT_LIST_HEAD(&connector->modes);
842 connector->edid_blob_ptr = NULL;
843 connector->status = connector_status_unknown;
844
845 list_add_tail(&connector->head, &dev->mode_config.connector_list);
846 dev->mode_config.num_connector++;
847
848 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
849 drm_object_attach_property(&connector->base,
850 dev->mode_config.edid_property,
851 0);
852
853 drm_object_attach_property(&connector->base,
854 dev->mode_config.dpms_property, 0);
855
856 out:
857 drm_modeset_unlock_all(dev);
858
859 return ret;
860}
861EXPORT_SYMBOL(drm_connector_init);
862
863/**
864 * drm_connector_cleanup - cleans up an initialised connector
865 * @connector: connector to cleanup
866 *
867 * Cleans up the connector but doesn't free the object.
868 */
869void drm_connector_cleanup(struct drm_connector *connector)
870{
871 struct drm_device *dev = connector->dev;
872 struct drm_display_mode *mode, *t;
873
874 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
875 drm_mode_remove(connector, mode);
876
877 list_for_each_entry_safe(mode, t, &connector->modes, head)
878 drm_mode_remove(connector, mode);
879
880 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
881 connector->connector_type_id);
882
883 drm_mode_object_put(dev, &connector->base);
884 list_del(&connector->head);
885 dev->mode_config.num_connector--;
886}
887EXPORT_SYMBOL(drm_connector_cleanup);
888
889/**
890 * drm_connector_unplug_all - unregister connector userspace interfaces
891 * @dev: drm device
892 *
893 * This function unregisters all connector userspace interfaces in sysfs. Should
894 * be call when the device is disconnected, e.g. from an usb driver's
895 * ->disconnect callback.
896 */
897void drm_connector_unplug_all(struct drm_device *dev)
898{
899 struct drm_connector *connector;
900
901 /* taking the mode config mutex ends up in a clash with sysfs */
902 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
903 drm_sysfs_connector_remove(connector);
904
905}
906EXPORT_SYMBOL(drm_connector_unplug_all);
907
908/**
909 * drm_bridge_init - initialize a drm transcoder/bridge
910 * @dev: drm device
911 * @bridge: transcoder/bridge to set up
912 * @funcs: bridge function table
913 *
914 * Initialises a preallocated bridge. Bridges should be
915 * subclassed as part of driver connector objects.
916 *
917 * Returns:
918 * Zero on success, error code on failure.
919 */
920int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
921 const struct drm_bridge_funcs *funcs)
922{
923 int ret;
924
925 drm_modeset_lock_all(dev);
926
927 ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
928 if (ret)
929 goto out;
930
931 bridge->dev = dev;
932 bridge->funcs = funcs;
933
934 list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
935 dev->mode_config.num_bridge++;
936
937 out:
938 drm_modeset_unlock_all(dev);
939 return ret;
940}
941EXPORT_SYMBOL(drm_bridge_init);
942
943/**
944 * drm_bridge_cleanup - cleans up an initialised bridge
945 * @bridge: bridge to cleanup
946 *
947 * Cleans up the bridge but doesn't free the object.
948 */
949void drm_bridge_cleanup(struct drm_bridge *bridge)
950{
951 struct drm_device *dev = bridge->dev;
952
953 drm_modeset_lock_all(dev);
954 drm_mode_object_put(dev, &bridge->base);
955 list_del(&bridge->head);
956 dev->mode_config.num_bridge--;
957 drm_modeset_unlock_all(dev);
958}
959EXPORT_SYMBOL(drm_bridge_cleanup);
960
961/**
962 * drm_encoder_init - Init a preallocated encoder
963 * @dev: drm device
964 * @encoder: the encoder to init
965 * @funcs: callbacks for this encoder
966 * @encoder_type: user visible type of the encoder
967 *
968 * Initialises a preallocated encoder. Encoder should be
969 * subclassed as part of driver encoder objects.
970 *
971 * Returns:
972 * Zero on success, error code on failure.
973 */
974int drm_encoder_init(struct drm_device *dev,
975 struct drm_encoder *encoder,
976 const struct drm_encoder_funcs *funcs,
977 int encoder_type)
978{
979 int ret;
980
981 drm_modeset_lock_all(dev);
982
983 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
984 if (ret)
985 goto out;
986
987 encoder->dev = dev;
988 encoder->encoder_type = encoder_type;
989 encoder->funcs = funcs;
990
991 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
992 dev->mode_config.num_encoder++;
993
994 out:
995 drm_modeset_unlock_all(dev);
996
997 return ret;
998}
999EXPORT_SYMBOL(drm_encoder_init);
1000
1001/**
1002 * drm_encoder_cleanup - cleans up an initialised encoder
1003 * @encoder: encoder to cleanup
1004 *
1005 * Cleans up the encoder but doesn't free the object.
1006 */
1007void drm_encoder_cleanup(struct drm_encoder *encoder)
1008{
1009 struct drm_device *dev = encoder->dev;
1010 drm_modeset_lock_all(dev);
1011 drm_mode_object_put(dev, &encoder->base);
1012 list_del(&encoder->head);
1013 dev->mode_config.num_encoder--;
1014 drm_modeset_unlock_all(dev);
1015}
1016EXPORT_SYMBOL(drm_encoder_cleanup);
1017
1018/**
1019 * drm_universal_plane_init - Initialize a new universal plane object
1020 * @dev: DRM device
1021 * @plane: plane object to init
1022 * @possible_crtcs: bitmask of possible CRTCs
1023 * @funcs: callbacks for the new plane
1024 * @formats: array of supported formats (%DRM_FORMAT_*)
1025 * @format_count: number of elements in @formats
1026 * @type: type of plane (overlay, primary, cursor)
1027 *
1028 * Initializes a plane object of type @type.
1029 *
1030 * Returns:
1031 * Zero on success, error code on failure.
1032 */
1033int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1034 unsigned long possible_crtcs,
1035 const struct drm_plane_funcs *funcs,
1036 const uint32_t *formats, uint32_t format_count,
1037 enum drm_plane_type type)
1038{
1039 int ret;
1040
1041 drm_modeset_lock_all(dev);
1042
1043 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1044 if (ret)
1045 goto out;
1046
1047 plane->base.properties = &plane->properties;
1048 plane->dev = dev;
1049 plane->funcs = funcs;
1050 plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
1051 GFP_KERNEL);
1052 if (!plane->format_types) {
1053 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1054 drm_mode_object_put(dev, &plane->base);
1055 ret = -ENOMEM;
1056 goto out;
1057 }
1058
1059 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
1060 plane->format_count = format_count;
1061 plane->possible_crtcs = possible_crtcs;
1062 plane->type = type;
1063
1064 list_add_tail(&plane->head, &dev->mode_config.plane_list);
1065 dev->mode_config.num_total_plane++;
1066 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1067 dev->mode_config.num_overlay_plane++;
1068
1069 drm_object_attach_property(&plane->base,
1070 dev->mode_config.plane_type_property,
1071 plane->type);
1072
1073 out:
1074 drm_modeset_unlock_all(dev);
1075
1076 return ret;
1077}
1078EXPORT_SYMBOL(drm_universal_plane_init);
1079
1080/**
1081 * drm_plane_init - Initialize a legacy plane
1082 * @dev: DRM device
1083 * @plane: plane object to init
1084 * @possible_crtcs: bitmask of possible CRTCs
1085 * @funcs: callbacks for the new plane
1086 * @formats: array of supported formats (%DRM_FORMAT_*)
1087 * @format_count: number of elements in @formats
1088 * @is_primary: plane type (primary vs overlay)
1089 *
1090 * Legacy API to initialize a DRM plane.
1091 *
1092 * New drivers should call drm_universal_plane_init() instead.
1093 *
1094 * Returns:
1095 * Zero on success, error code on failure.
1096 */
1097int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1098 unsigned long possible_crtcs,
1099 const struct drm_plane_funcs *funcs,
1100 const uint32_t *formats, uint32_t format_count,
1101 bool is_primary)
1102{
1103 enum drm_plane_type type;
1104
1105 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1106 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1107 formats, format_count, type);
1108}
1109EXPORT_SYMBOL(drm_plane_init);
1110
1111/**
1112 * drm_plane_cleanup - Clean up the core plane usage
1113 * @plane: plane to cleanup
1114 *
1115 * This function cleans up @plane and removes it from the DRM mode setting
1116 * core. Note that the function does *not* free the plane structure itself,
1117 * this is the responsibility of the caller.
1118 */
1119void drm_plane_cleanup(struct drm_plane *plane)
1120{
1121 struct drm_device *dev = plane->dev;
1122
1123 drm_modeset_lock_all(dev);
1124 kfree(plane->format_types);
1125 drm_mode_object_put(dev, &plane->base);
1126
1127 BUG_ON(list_empty(&plane->head));
1128
1129 list_del(&plane->head);
1130 dev->mode_config.num_total_plane--;
1131 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1132 dev->mode_config.num_overlay_plane--;
1133 drm_modeset_unlock_all(dev);
1134}
1135EXPORT_SYMBOL(drm_plane_cleanup);
1136
1137/**
1138 * drm_plane_force_disable - Forcibly disable a plane
1139 * @plane: plane to disable
1140 *
1141 * Forces the plane to be disabled.
1142 *
1143 * Used when the plane's current framebuffer is destroyed,
1144 * and when restoring fbdev mode.
1145 */
1146void drm_plane_force_disable(struct drm_plane *plane)
1147{
1148 int ret;
1149
1150 if (!plane->fb)
1151 return;
1152
1153 ret = plane->funcs->disable_plane(plane);
1154 if (ret)
1155 DRM_ERROR("failed to disable plane with busy fb\n");
1156 /* disconnect the plane from the fb and crtc: */
1157 __drm_framebuffer_unreference(plane->fb);
1158 plane->fb = NULL;
1159 plane->crtc = NULL;
1160}
1161EXPORT_SYMBOL(drm_plane_force_disable);
1162
1163static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
1164{
1165 struct drm_property *edid;
1166 struct drm_property *dpms;
1167
1168 /*
1169 * Standard properties (apply to all connectors)
1170 */
1171 edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1172 DRM_MODE_PROP_IMMUTABLE,
1173 "EDID", 0);
1174 dev->mode_config.edid_property = edid;
1175
1176 dpms = drm_property_create_enum(dev, 0,
1177 "DPMS", drm_dpms_enum_list,
1178 ARRAY_SIZE(drm_dpms_enum_list));
1179 dev->mode_config.dpms_property = dpms;
1180
1181 return 0;
1182}
1183
1184static int drm_mode_create_standard_plane_properties(struct drm_device *dev)
1185{
1186 struct drm_property *type;
1187
1188 /*
1189 * Standard properties (apply to all planes)
1190 */
1191 type = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1192 "type", drm_plane_type_enum_list,
1193 ARRAY_SIZE(drm_plane_type_enum_list));
1194 dev->mode_config.plane_type_property = type;
1195
1196 return 0;
1197}
1198
1199/**
1200 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1201 * @dev: DRM device
1202 *
1203 * Called by a driver the first time a DVI-I connector is made.
1204 */
1205int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1206{
1207 struct drm_property *dvi_i_selector;
1208 struct drm_property *dvi_i_subconnector;
1209
1210 if (dev->mode_config.dvi_i_select_subconnector_property)
1211 return 0;
1212
1213 dvi_i_selector =
1214 drm_property_create_enum(dev, 0,
1215 "select subconnector",
1216 drm_dvi_i_select_enum_list,
1217 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1218 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1219
1220 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1221 "subconnector",
1222 drm_dvi_i_subconnector_enum_list,
1223 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1224 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1225
1226 return 0;
1227}
1228EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1229
1230/**
1231 * drm_create_tv_properties - create TV specific connector properties
1232 * @dev: DRM device
1233 * @num_modes: number of different TV formats (modes) supported
1234 * @modes: array of pointers to strings containing name of each format
1235 *
1236 * Called by a driver's TV initialization routine, this function creates
1237 * the TV specific connector properties for a given device. Caller is
1238 * responsible for allocating a list of format names and passing them to
1239 * this routine.
1240 */
1241int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
1242 char *modes[])
1243{
1244 struct drm_property *tv_selector;
1245 struct drm_property *tv_subconnector;
1246 int i;
1247
1248 if (dev->mode_config.tv_select_subconnector_property)
1249 return 0;
1250
1251 /*
1252 * Basic connector properties
1253 */
1254 tv_selector = drm_property_create_enum(dev, 0,
1255 "select subconnector",
1256 drm_tv_select_enum_list,
1257 ARRAY_SIZE(drm_tv_select_enum_list));
1258 dev->mode_config.tv_select_subconnector_property = tv_selector;
1259
1260 tv_subconnector =
1261 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1262 "subconnector",
1263 drm_tv_subconnector_enum_list,
1264 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1265 dev->mode_config.tv_subconnector_property = tv_subconnector;
1266
1267 /*
1268 * Other, TV specific properties: margins & TV modes.
1269 */
1270 dev->mode_config.tv_left_margin_property =
1271 drm_property_create_range(dev, 0, "left margin", 0, 100);
1272
1273 dev->mode_config.tv_right_margin_property =
1274 drm_property_create_range(dev, 0, "right margin", 0, 100);
1275
1276 dev->mode_config.tv_top_margin_property =
1277 drm_property_create_range(dev, 0, "top margin", 0, 100);
1278
1279 dev->mode_config.tv_bottom_margin_property =
1280 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1281
1282 dev->mode_config.tv_mode_property =
1283 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1284 "mode", num_modes);
1285 for (i = 0; i < num_modes; i++)
1286 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1287 i, modes[i]);
1288
1289 dev->mode_config.tv_brightness_property =
1290 drm_property_create_range(dev, 0, "brightness", 0, 100);
1291
1292 dev->mode_config.tv_contrast_property =
1293 drm_property_create_range(dev, 0, "contrast", 0, 100);
1294
1295 dev->mode_config.tv_flicker_reduction_property =
1296 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1297
1298 dev->mode_config.tv_overscan_property =
1299 drm_property_create_range(dev, 0, "overscan", 0, 100);
1300
1301 dev->mode_config.tv_saturation_property =
1302 drm_property_create_range(dev, 0, "saturation", 0, 100);
1303
1304 dev->mode_config.tv_hue_property =
1305 drm_property_create_range(dev, 0, "hue", 0, 100);
1306
1307 return 0;
1308}
1309EXPORT_SYMBOL(drm_mode_create_tv_properties);
1310
1311/**
1312 * drm_mode_create_scaling_mode_property - create scaling mode property
1313 * @dev: DRM device
1314 *
1315 * Called by a driver the first time it's needed, must be attached to desired
1316 * connectors.
1317 */
1318int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1319{
1320 struct drm_property *scaling_mode;
1321
1322 if (dev->mode_config.scaling_mode_property)
1323 return 0;
1324
1325 scaling_mode =
1326 drm_property_create_enum(dev, 0, "scaling mode",
1327 drm_scaling_mode_enum_list,
1328 ARRAY_SIZE(drm_scaling_mode_enum_list));
1329
1330 dev->mode_config.scaling_mode_property = scaling_mode;
1331
1332 return 0;
1333}
1334EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1335
1336/**
1337 * drm_mode_create_dirty_property - create dirty property
1338 * @dev: DRM device
1339 *
1340 * Called by a driver the first time it's needed, must be attached to desired
1341 * connectors.
1342 */
1343int drm_mode_create_dirty_info_property(struct drm_device *dev)
1344{
1345 struct drm_property *dirty_info;
1346
1347 if (dev->mode_config.dirty_info_property)
1348 return 0;
1349
1350 dirty_info =
1351 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1352 "dirty",
1353 drm_dirty_info_enum_list,
1354 ARRAY_SIZE(drm_dirty_info_enum_list));
1355 dev->mode_config.dirty_info_property = dirty_info;
1356
1357 return 0;
1358}
1359EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1360
1361static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
1362{
1363 uint32_t total_objects = 0;
1364
1365 total_objects += dev->mode_config.num_crtc;
1366 total_objects += dev->mode_config.num_connector;
1367 total_objects += dev->mode_config.num_encoder;
1368 total_objects += dev->mode_config.num_bridge;
1369
1370 group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
1371 if (!group->id_list)
1372 return -ENOMEM;
1373
1374 group->num_crtcs = 0;
1375 group->num_connectors = 0;
1376 group->num_encoders = 0;
1377 group->num_bridges = 0;
1378 return 0;
1379}
1380
1381/*
1382 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is
1383 * the drm core's responsibility to set up mode control groups.
1384 */
1385int drm_mode_group_init_legacy_group(struct drm_device *dev,
1386 struct drm_mode_group *group)
1387{
1388 struct drm_crtc *crtc;
1389 struct drm_encoder *encoder;
1390 struct drm_connector *connector;
1391 struct drm_bridge *bridge;
1392 int ret;
1393
1394 if ((ret = drm_mode_group_init(dev, group)))
1395 return ret;
1396
1397 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1398 group->id_list[group->num_crtcs++] = crtc->base.id;
1399
1400 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
1401 group->id_list[group->num_crtcs + group->num_encoders++] =
1402 encoder->base.id;
1403
1404 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1405 group->id_list[group->num_crtcs + group->num_encoders +
1406 group->num_connectors++] = connector->base.id;
1407
1408 list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
1409 group->id_list[group->num_crtcs + group->num_encoders +
1410 group->num_connectors + group->num_bridges++] =
1411 bridge->base.id;
1412
1413 return 0;
1414}
1415EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
1416
1417/**
1418 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1419 * @out: drm_mode_modeinfo struct to return to the user
1420 * @in: drm_display_mode to use
1421 *
1422 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1423 * the user.
1424 */
1425static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
1426 const struct drm_display_mode *in)
1427{
1428 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1429 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1430 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1431 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1432 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1433 "timing values too large for mode info\n");
1434
1435 out->clock = in->clock;
1436 out->hdisplay = in->hdisplay;
1437 out->hsync_start = in->hsync_start;
1438 out->hsync_end = in->hsync_end;
1439 out->htotal = in->htotal;
1440 out->hskew = in->hskew;
1441 out->vdisplay = in->vdisplay;
1442 out->vsync_start = in->vsync_start;
1443 out->vsync_end = in->vsync_end;
1444 out->vtotal = in->vtotal;
1445 out->vscan = in->vscan;
1446 out->vrefresh = in->vrefresh;
1447 out->flags = in->flags;
1448 out->type = in->type;
1449 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1450 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1451}
1452
1453/**
1454 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1455 * @out: drm_display_mode to return to the user
1456 * @in: drm_mode_modeinfo to use
1457 *
1458 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1459 * the caller.
1460 *
1461 * Returns:
1462 * Zero on success, errno on failure.
1463 */
1464static int drm_crtc_convert_umode(struct drm_display_mode *out,
1465 const struct drm_mode_modeinfo *in)
1466{
1467 if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
1468 return -ERANGE;
1469
1470 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1471 return -EINVAL;
1472
1473 out->clock = in->clock;
1474 out->hdisplay = in->hdisplay;
1475 out->hsync_start = in->hsync_start;
1476 out->hsync_end = in->hsync_end;
1477 out->htotal = in->htotal;
1478 out->hskew = in->hskew;
1479 out->vdisplay = in->vdisplay;
1480 out->vsync_start = in->vsync_start;
1481 out->vsync_end = in->vsync_end;
1482 out->vtotal = in->vtotal;
1483 out->vscan = in->vscan;
1484 out->vrefresh = in->vrefresh;
1485 out->flags = in->flags;
1486 out->type = in->type;
1487 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1488 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1489
1490 return 0;
1491}
1492
1493/**
1494 * drm_mode_getresources - get graphics configuration
1495 * @dev: drm device for the ioctl
1496 * @data: data pointer for the ioctl
1497 * @file_priv: drm file for the ioctl call
1498 *
1499 * Construct a set of configuration description structures and return
1500 * them to the user, including CRTC, connector and framebuffer configuration.
1501 *
1502 * Called by the user via ioctl.
1503 *
1504 * Returns:
1505 * Zero on success, errno on failure.
1506 */
1507int drm_mode_getresources(struct drm_device *dev, void *data,
1508 struct drm_file *file_priv)
1509{
1510 struct drm_mode_card_res *card_res = data;
1511 struct list_head *lh;
1512 struct drm_framebuffer *fb;
1513 struct drm_connector *connector;
1514 struct drm_crtc *crtc;
1515 struct drm_encoder *encoder;
1516 int ret = 0;
1517 int connector_count = 0;
1518 int crtc_count = 0;
1519 int fb_count = 0;
1520 int encoder_count = 0;
1521 int copied = 0, i;
1522 uint32_t __user *fb_id;
1523 uint32_t __user *crtc_id;
1524 uint32_t __user *connector_id;
1525 uint32_t __user *encoder_id;
1526 struct drm_mode_group *mode_group;
1527
1528 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1529 return -EINVAL;
1530
1531
1532 mutex_lock(&file_priv->fbs_lock);
1533 /*
1534 * For the non-control nodes we need to limit the list of resources
1535 * by IDs in the group list for this node
1536 */
1537 list_for_each(lh, &file_priv->fbs)
1538 fb_count++;
1539
1540 /* handle this in 4 parts */
1541 /* FBs */
1542 if (card_res->count_fbs >= fb_count) {
1543 copied = 0;
1544 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1545 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1546 if (put_user(fb->base.id, fb_id + copied)) {
1547 mutex_unlock(&file_priv->fbs_lock);
1548 return -EFAULT;
1549 }
1550 copied++;
1551 }
1552 }
1553 card_res->count_fbs = fb_count;
1554 mutex_unlock(&file_priv->fbs_lock);
1555
1556 drm_modeset_lock_all(dev);
1557 if (!drm_is_primary_client(file_priv)) {
1558
1559 mode_group = NULL;
1560 list_for_each(lh, &dev->mode_config.crtc_list)
1561 crtc_count++;
1562
1563 list_for_each(lh, &dev->mode_config.connector_list)
1564 connector_count++;
1565
1566 list_for_each(lh, &dev->mode_config.encoder_list)
1567 encoder_count++;
1568 } else {
1569
1570 mode_group = &file_priv->master->minor->mode_group;
1571 crtc_count = mode_group->num_crtcs;
1572 connector_count = mode_group->num_connectors;
1573 encoder_count = mode_group->num_encoders;
1574 }
1575
1576 card_res->max_height = dev->mode_config.max_height;
1577 card_res->min_height = dev->mode_config.min_height;
1578 card_res->max_width = dev->mode_config.max_width;
1579 card_res->min_width = dev->mode_config.min_width;
1580
1581 /* CRTCs */
1582 if (card_res->count_crtcs >= crtc_count) {
1583 copied = 0;
1584 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1585 if (!mode_group) {
1586 list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1587 head) {
1588 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1589 if (put_user(crtc->base.id, crtc_id + copied)) {
1590 ret = -EFAULT;
1591 goto out;
1592 }
1593 copied++;
1594 }
1595 } else {
1596 for (i = 0; i < mode_group->num_crtcs; i++) {
1597 if (put_user(mode_group->id_list[i],
1598 crtc_id + copied)) {
1599 ret = -EFAULT;
1600 goto out;
1601 }
1602 copied++;
1603 }
1604 }
1605 }
1606 card_res->count_crtcs = crtc_count;
1607
1608 /* Encoders */
1609 if (card_res->count_encoders >= encoder_count) {
1610 copied = 0;
1611 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1612 if (!mode_group) {
1613 list_for_each_entry(encoder,
1614 &dev->mode_config.encoder_list,
1615 head) {
1616 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1617 drm_get_encoder_name(encoder));
1618 if (put_user(encoder->base.id, encoder_id +
1619 copied)) {
1620 ret = -EFAULT;
1621 goto out;
1622 }
1623 copied++;
1624 }
1625 } else {
1626 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1627 if (put_user(mode_group->id_list[i],
1628 encoder_id + copied)) {
1629 ret = -EFAULT;
1630 goto out;
1631 }
1632 copied++;
1633 }
1634
1635 }
1636 }
1637 card_res->count_encoders = encoder_count;
1638
1639 /* Connectors */
1640 if (card_res->count_connectors >= connector_count) {
1641 copied = 0;
1642 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1643 if (!mode_group) {
1644 list_for_each_entry(connector,
1645 &dev->mode_config.connector_list,
1646 head) {
1647 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1648 connector->base.id,
1649 drm_get_connector_name(connector));
1650 if (put_user(connector->base.id,
1651 connector_id + copied)) {
1652 ret = -EFAULT;
1653 goto out;
1654 }
1655 copied++;
1656 }
1657 } else {
1658 int start = mode_group->num_crtcs +
1659 mode_group->num_encoders;
1660 for (i = start; i < start + mode_group->num_connectors; i++) {
1661 if (put_user(mode_group->id_list[i],
1662 connector_id + copied)) {
1663 ret = -EFAULT;
1664 goto out;
1665 }
1666 copied++;
1667 }
1668 }
1669 }
1670 card_res->count_connectors = connector_count;
1671
1672 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1673 card_res->count_connectors, card_res->count_encoders);
1674
1675out:
1676 drm_modeset_unlock_all(dev);
1677 return ret;
1678}
1679
1680/**
1681 * drm_mode_getcrtc - get CRTC configuration
1682 * @dev: drm device for the ioctl
1683 * @data: data pointer for the ioctl
1684 * @file_priv: drm file for the ioctl call
1685 *
1686 * Construct a CRTC configuration structure to return to the user.
1687 *
1688 * Called by the user via ioctl.
1689 *
1690 * Returns:
1691 * Zero on success, errno on failure.
1692 */
1693int drm_mode_getcrtc(struct drm_device *dev,
1694 void *data, struct drm_file *file_priv)
1695{
1696 struct drm_mode_crtc *crtc_resp = data;
1697 struct drm_crtc *crtc;
1698 struct drm_mode_object *obj;
1699 int ret = 0;
1700
1701 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1702 return -EINVAL;
1703
1704 drm_modeset_lock_all(dev);
1705
1706 obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1707 DRM_MODE_OBJECT_CRTC);
1708 if (!obj) {
1709 ret = -ENOENT;
1710 goto out;
1711 }
1712 crtc = obj_to_crtc(obj);
1713
1714 crtc_resp->x = crtc->x;
1715 crtc_resp->y = crtc->y;
1716 crtc_resp->gamma_size = crtc->gamma_size;
1717 if (crtc->primary->fb)
1718 crtc_resp->fb_id = crtc->primary->fb->base.id;
1719 else
1720 crtc_resp->fb_id = 0;
1721
1722 if (crtc->enabled) {
1723
1724 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1725 crtc_resp->mode_valid = 1;
1726
1727 } else {
1728 crtc_resp->mode_valid = 0;
1729 }
1730
1731out:
1732 drm_modeset_unlock_all(dev);
1733 return ret;
1734}
1735
1736static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1737 const struct drm_file *file_priv)
1738{
1739 /*
1740 * If user-space hasn't configured the driver to expose the stereo 3D
1741 * modes, don't expose them.
1742 */
1743 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1744 return false;
1745
1746 return true;
1747}
1748
1749/**
1750 * drm_mode_getconnector - get connector configuration
1751 * @dev: drm device for the ioctl
1752 * @data: data pointer for the ioctl
1753 * @file_priv: drm file for the ioctl call
1754 *
1755 * Construct a connector configuration structure to return to the user.
1756 *
1757 * Called by the user via ioctl.
1758 *
1759 * Returns:
1760 * Zero on success, errno on failure.
1761 */
1762int drm_mode_getconnector(struct drm_device *dev, void *data,
1763 struct drm_file *file_priv)
1764{
1765 struct drm_mode_get_connector *out_resp = data;
1766 struct drm_mode_object *obj;
1767 struct drm_connector *connector;
1768 struct drm_display_mode *mode;
1769 int mode_count = 0;
1770 int props_count = 0;
1771 int encoders_count = 0;
1772 int ret = 0;
1773 int copied = 0;
1774 int i;
1775 struct drm_mode_modeinfo u_mode;
1776 struct drm_mode_modeinfo __user *mode_ptr;
1777 uint32_t __user *prop_ptr;
1778 uint64_t __user *prop_values;
1779 uint32_t __user *encoder_ptr;
1780
1781 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1782 return -EINVAL;
1783
1784 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1785
1786 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1787
1788 mutex_lock(&dev->mode_config.mutex);
1789
1790 obj = drm_mode_object_find(dev, out_resp->connector_id,
1791 DRM_MODE_OBJECT_CONNECTOR);
1792 if (!obj) {
1793 ret = -ENOENT;
1794 goto out;
1795 }
1796 connector = obj_to_connector(obj);
1797
1798 props_count = connector->properties.count;
1799
1800 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1801 if (connector->encoder_ids[i] != 0) {
1802 encoders_count++;
1803 }
1804 }
1805
1806 if (out_resp->count_modes == 0) {
1807 connector->funcs->fill_modes(connector,
1808 dev->mode_config.max_width,
1809 dev->mode_config.max_height);
1810 }
1811
1812 /* delayed so we get modes regardless of pre-fill_modes state */
1813 list_for_each_entry(mode, &connector->modes, head)
1814 if (drm_mode_expose_to_userspace(mode, file_priv))
1815 mode_count++;
1816
1817 out_resp->connector_id = connector->base.id;
1818 out_resp->connector_type = connector->connector_type;
1819 out_resp->connector_type_id = connector->connector_type_id;
1820 out_resp->mm_width = connector->display_info.width_mm;
1821 out_resp->mm_height = connector->display_info.height_mm;
1822 out_resp->subpixel = connector->display_info.subpixel_order;
1823 out_resp->connection = connector->status;
1824 if (connector->encoder)
1825 out_resp->encoder_id = connector->encoder->base.id;
1826 else
1827 out_resp->encoder_id = 0;
1828
1829 /*
1830 * This ioctl is called twice, once to determine how much space is
1831 * needed, and the 2nd time to fill it.
1832 */
1833 if ((out_resp->count_modes >= mode_count) && mode_count) {
1834 copied = 0;
1835 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1836 list_for_each_entry(mode, &connector->modes, head) {
1837 if (!drm_mode_expose_to_userspace(mode, file_priv))
1838 continue;
1839
1840 drm_crtc_convert_to_umode(&u_mode, mode);
1841 if (copy_to_user(mode_ptr + copied,
1842 &u_mode, sizeof(u_mode))) {
1843 ret = -EFAULT;
1844 goto out;
1845 }
1846 copied++;
1847 }
1848 }
1849 out_resp->count_modes = mode_count;
1850
1851 if ((out_resp->count_props >= props_count) && props_count) {
1852 copied = 0;
1853 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr);
1854 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr);
1855 for (i = 0; i < connector->properties.count; i++) {
1856 if (put_user(connector->properties.ids[i],
1857 prop_ptr + copied)) {
1858 ret = -EFAULT;
1859 goto out;
1860 }
1861
1862 if (put_user(connector->properties.values[i],
1863 prop_values + copied)) {
1864 ret = -EFAULT;
1865 goto out;
1866 }
1867 copied++;
1868 }
1869 }
1870 out_resp->count_props = props_count;
1871
1872 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1873 copied = 0;
1874 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1875 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1876 if (connector->encoder_ids[i] != 0) {
1877 if (put_user(connector->encoder_ids[i],
1878 encoder_ptr + copied)) {
1879 ret = -EFAULT;
1880 goto out;
1881 }
1882 copied++;
1883 }
1884 }
1885 }
1886 out_resp->count_encoders = encoders_count;
1887
1888out:
1889 mutex_unlock(&dev->mode_config.mutex);
1890
1891 return ret;
1892}
1893
1894/**
1895 * drm_mode_getencoder - get encoder configuration
1896 * @dev: drm device for the ioctl
1897 * @data: data pointer for the ioctl
1898 * @file_priv: drm file for the ioctl call
1899 *
1900 * Construct a encoder configuration structure to return to the user.
1901 *
1902 * Called by the user via ioctl.
1903 *
1904 * Returns:
1905 * Zero on success, errno on failure.
1906 */
1907int drm_mode_getencoder(struct drm_device *dev, void *data,
1908 struct drm_file *file_priv)
1909{
1910 struct drm_mode_get_encoder *enc_resp = data;
1911 struct drm_mode_object *obj;
1912 struct drm_encoder *encoder;
1913 int ret = 0;
1914
1915 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1916 return -EINVAL;
1917
1918 drm_modeset_lock_all(dev);
1919 obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1920 DRM_MODE_OBJECT_ENCODER);
1921 if (!obj) {
1922 ret = -ENOENT;
1923 goto out;
1924 }
1925 encoder = obj_to_encoder(obj);
1926
1927 if (encoder->crtc)
1928 enc_resp->crtc_id = encoder->crtc->base.id;
1929 else
1930 enc_resp->crtc_id = 0;
1931 enc_resp->encoder_type = encoder->encoder_type;
1932 enc_resp->encoder_id = encoder->base.id;
1933 enc_resp->possible_crtcs = encoder->possible_crtcs;
1934 enc_resp->possible_clones = encoder->possible_clones;
1935
1936out:
1937 drm_modeset_unlock_all(dev);
1938 return ret;
1939}
1940
1941/**
1942 * drm_mode_getplane_res - enumerate all plane resources
1943 * @dev: DRM device
1944 * @data: ioctl data
1945 * @file_priv: DRM file info
1946 *
1947 * Construct a list of plane ids to return to the user.
1948 *
1949 * Called by the user via ioctl.
1950 *
1951 * Returns:
1952 * Zero on success, errno on failure.
1953 */
1954int drm_mode_getplane_res(struct drm_device *dev, void *data,
1955 struct drm_file *file_priv)
1956{
1957 struct drm_mode_get_plane_res *plane_resp = data;
1958 struct drm_mode_config *config;
1959 struct drm_plane *plane;
1960 uint32_t __user *plane_ptr;
1961 int copied = 0, ret = 0;
1962 unsigned num_planes;
1963
1964 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1965 return -EINVAL;
1966
1967 drm_modeset_lock_all(dev);
1968 config = &dev->mode_config;
1969
1970 if (file_priv->universal_planes)
1971 num_planes = config->num_total_plane;
1972 else
1973 num_planes = config->num_overlay_plane;
1974
1975 /*
1976 * This ioctl is called twice, once to determine how much space is
1977 * needed, and the 2nd time to fill it.
1978 */
1979 if (num_planes &&
1980 (plane_resp->count_planes >= num_planes)) {
1981 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
1982
1983 list_for_each_entry(plane, &config->plane_list, head) {
1984 /*
1985 * Unless userspace set the 'universal planes'
1986 * capability bit, only advertise overlays.
1987 */
1988 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
1989 !file_priv->universal_planes)
1990 continue;
1991
1992 if (put_user(plane->base.id, plane_ptr + copied)) {
1993 ret = -EFAULT;
1994 goto out;
1995 }
1996 copied++;
1997 }
1998 }
1999 plane_resp->count_planes = num_planes;
2000
2001out:
2002 drm_modeset_unlock_all(dev);
2003 return ret;
2004}
2005
2006/**
2007 * drm_mode_getplane - get plane configuration
2008 * @dev: DRM device
2009 * @data: ioctl data
2010 * @file_priv: DRM file info
2011 *
2012 * Construct a plane configuration structure to return to the user.
2013 *
2014 * Called by the user via ioctl.
2015 *
2016 * Returns:
2017 * Zero on success, errno on failure.
2018 */
2019int drm_mode_getplane(struct drm_device *dev, void *data,
2020 struct drm_file *file_priv)
2021{
2022 struct drm_mode_get_plane *plane_resp = data;
2023 struct drm_mode_object *obj;
2024 struct drm_plane *plane;
2025 uint32_t __user *format_ptr;
2026 int ret = 0;
2027
2028 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2029 return -EINVAL;
2030
2031 drm_modeset_lock_all(dev);
2032 obj = drm_mode_object_find(dev, plane_resp->plane_id,
2033 DRM_MODE_OBJECT_PLANE);
2034 if (!obj) {
2035 ret = -ENOENT;
2036 goto out;
2037 }
2038 plane = obj_to_plane(obj);
2039
2040 if (plane->crtc)
2041 plane_resp->crtc_id = plane->crtc->base.id;
2042 else
2043 plane_resp->crtc_id = 0;
2044
2045 if (plane->fb)
2046 plane_resp->fb_id = plane->fb->base.id;
2047 else
2048 plane_resp->fb_id = 0;
2049
2050 plane_resp->plane_id = plane->base.id;
2051 plane_resp->possible_crtcs = plane->possible_crtcs;
2052 plane_resp->gamma_size = 0;
2053
2054 /*
2055 * This ioctl is called twice, once to determine how much space is
2056 * needed, and the 2nd time to fill it.
2057 */
2058 if (plane->format_count &&
2059 (plane_resp->count_format_types >= plane->format_count)) {
2060 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
2061 if (copy_to_user(format_ptr,
2062 plane->format_types,
2063 sizeof(uint32_t) * plane->format_count)) {
2064 ret = -EFAULT;
2065 goto out;
2066 }
2067 }
2068 plane_resp->count_format_types = plane->format_count;
2069
2070out:
2071 drm_modeset_unlock_all(dev);
2072 return ret;
2073}
2074
2075/**
2076 * drm_mode_setplane - configure a plane's configuration
2077 * @dev: DRM device
2078 * @data: ioctl data*
2079 * @file_priv: DRM file info
2080 *
2081 * Set plane configuration, including placement, fb, scaling, and other factors.
2082 * Or pass a NULL fb to disable.
2083 *
2084 * Returns:
2085 * Zero on success, errno on failure.
2086 */
2087int drm_mode_setplane(struct drm_device *dev, void *data,
2088 struct drm_file *file_priv)
2089{
2090 struct drm_mode_set_plane *plane_req = data;
2091 struct drm_mode_object *obj;
2092 struct drm_plane *plane;
2093 struct drm_crtc *crtc;
2094 struct drm_framebuffer *fb = NULL, *old_fb = NULL;
2095 int ret = 0;
2096 unsigned int fb_width, fb_height;
2097 int i;
2098
2099 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2100 return -EINVAL;
2101
2102 /*
2103 * First, find the plane, crtc, and fb objects. If not available,
2104 * we don't bother to call the driver.
2105 */
2106 obj = drm_mode_object_find(dev, plane_req->plane_id,
2107 DRM_MODE_OBJECT_PLANE);
2108 if (!obj) {
2109 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2110 plane_req->plane_id);
2111 return -ENOENT;
2112 }
2113 plane = obj_to_plane(obj);
2114
2115 /* No fb means shut it down */
2116 if (!plane_req->fb_id) {
2117 drm_modeset_lock_all(dev);
2118 old_fb = plane->fb;
2119 plane->funcs->disable_plane(plane);
2120 plane->crtc = NULL;
2121 plane->fb = NULL;
2122 drm_modeset_unlock_all(dev);
2123 goto out;
2124 }
2125
2126 obj = drm_mode_object_find(dev, plane_req->crtc_id,
2127 DRM_MODE_OBJECT_CRTC);
2128 if (!obj) {
2129 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2130 plane_req->crtc_id);
2131 ret = -ENOENT;
2132 goto out;
2133 }
2134 crtc = obj_to_crtc(obj);
2135
2136 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2137 if (!fb) {
2138 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2139 plane_req->fb_id);
2140 ret = -ENOENT;
2141 goto out;
2142 }
2143
2144 /* Check whether this plane supports the fb pixel format. */
2145 for (i = 0; i < plane->format_count; i++)
2146 if (fb->pixel_format == plane->format_types[i])
2147 break;
2148 if (i == plane->format_count) {
2149 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2150 drm_get_format_name(fb->pixel_format));
2151 ret = -EINVAL;
2152 goto out;
2153 }
2154
2155 fb_width = fb->width << 16;
2156 fb_height = fb->height << 16;
2157
2158 /* Make sure source coordinates are inside the fb. */
2159 if (plane_req->src_w > fb_width ||
2160 plane_req->src_x > fb_width - plane_req->src_w ||
2161 plane_req->src_h > fb_height ||
2162 plane_req->src_y > fb_height - plane_req->src_h) {
2163 DRM_DEBUG_KMS("Invalid source coordinates "
2164 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2165 plane_req->src_w >> 16,
2166 ((plane_req->src_w & 0xffff) * 15625) >> 10,
2167 plane_req->src_h >> 16,
2168 ((plane_req->src_h & 0xffff) * 15625) >> 10,
2169 plane_req->src_x >> 16,
2170 ((plane_req->src_x & 0xffff) * 15625) >> 10,
2171 plane_req->src_y >> 16,
2172 ((plane_req->src_y & 0xffff) * 15625) >> 10);
2173 ret = -ENOSPC;
2174 goto out;
2175 }
2176
2177 /* Give drivers some help against integer overflows */
2178 if (plane_req->crtc_w > INT_MAX ||
2179 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
2180 plane_req->crtc_h > INT_MAX ||
2181 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
2182 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2183 plane_req->crtc_w, plane_req->crtc_h,
2184 plane_req->crtc_x, plane_req->crtc_y);
2185 ret = -ERANGE;
2186 goto out;
2187 }
2188
2189 drm_modeset_lock_all(dev);
2190 ret = plane->funcs->update_plane(plane, crtc, fb,
2191 plane_req->crtc_x, plane_req->crtc_y,
2192 plane_req->crtc_w, plane_req->crtc_h,
2193 plane_req->src_x, plane_req->src_y,
2194 plane_req->src_w, plane_req->src_h);
2195 if (!ret) {
2196 old_fb = plane->fb;
2197 plane->crtc = crtc;
2198 plane->fb = fb;
2199 fb = NULL;
2200 }
2201 drm_modeset_unlock_all(dev);
2202
2203out:
2204 if (fb)
2205 drm_framebuffer_unreference(fb);
2206 if (old_fb)
2207 drm_framebuffer_unreference(old_fb);
2208
2209 return ret;
2210}
2211
2212/**
2213 * drm_mode_set_config_internal - helper to call ->set_config
2214 * @set: modeset config to set
2215 *
2216 * This is a little helper to wrap internal calls to the ->set_config driver
2217 * interface. The only thing it adds is correct refcounting dance.
2218 *
2219 * Returns:
2220 * Zero on success, errno on failure.
2221 */
2222int drm_mode_set_config_internal(struct drm_mode_set *set)
2223{
2224 struct drm_crtc *crtc = set->crtc;
2225 struct drm_framebuffer *fb;
2226 struct drm_crtc *tmp;
2227 int ret;
2228
2229 /*
2230 * NOTE: ->set_config can also disable other crtcs (if we steal all
2231 * connectors from it), hence we need to refcount the fbs across all
2232 * crtcs. Atomic modeset will have saner semantics ...
2233 */
2234 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head)
2235 tmp->old_fb = tmp->primary->fb;
2236
2237 fb = set->fb;
2238
2239 ret = crtc->funcs->set_config(set);
2240 if (ret == 0) {
2241 crtc->primary->crtc = crtc;
2242
2243 /* crtc->fb must be updated by ->set_config, enforces this. */
2244 WARN_ON(fb != crtc->primary->fb);
2245 }
2246
2247 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
2248 if (tmp->primary->fb)
2249 drm_framebuffer_reference(tmp->primary->fb);
2250 if (tmp->old_fb)
2251 drm_framebuffer_unreference(tmp->old_fb);
2252 }
2253
2254 return ret;
2255}
2256EXPORT_SYMBOL(drm_mode_set_config_internal);
2257
2258/**
2259 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2260 * CRTC viewport
2261 * @crtc: CRTC that framebuffer will be displayed on
2262 * @x: x panning
2263 * @y: y panning
2264 * @mode: mode that framebuffer will be displayed under
2265 * @fb: framebuffer to check size of
2266 */
2267int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2268 int x, int y,
2269 const struct drm_display_mode *mode,
2270 const struct drm_framebuffer *fb)
2271
2272{
2273 int hdisplay, vdisplay;
2274
2275 hdisplay = mode->hdisplay;
2276 vdisplay = mode->vdisplay;
2277
2278 if (drm_mode_is_stereo(mode)) {
2279 struct drm_display_mode adjusted = *mode;
2280
2281 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE);
2282 hdisplay = adjusted.crtc_hdisplay;
2283 vdisplay = adjusted.crtc_vdisplay;
2284 }
2285
2286 if (crtc->invert_dimensions)
2287 swap(hdisplay, vdisplay);
2288
2289 if (hdisplay > fb->width ||
2290 vdisplay > fb->height ||
2291 x > fb->width - hdisplay ||
2292 y > fb->height - vdisplay) {
2293 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
2294 fb->width, fb->height, hdisplay, vdisplay, x, y,
2295 crtc->invert_dimensions ? " (inverted)" : "");
2296 return -ENOSPC;
2297 }
2298
2299 return 0;
2300}
2301EXPORT_SYMBOL(drm_crtc_check_viewport);
2302
2303/**
2304 * drm_mode_setcrtc - set CRTC configuration
2305 * @dev: drm device for the ioctl
2306 * @data: data pointer for the ioctl
2307 * @file_priv: drm file for the ioctl call
2308 *
2309 * Build a new CRTC configuration based on user request.
2310 *
2311 * Called by the user via ioctl.
2312 *
2313 * Returns:
2314 * Zero on success, errno on failure.
2315 */
2316int drm_mode_setcrtc(struct drm_device *dev, void *data,
2317 struct drm_file *file_priv)
2318{
2319 struct drm_mode_config *config = &dev->mode_config;
2320 struct drm_mode_crtc *crtc_req = data;
2321 struct drm_mode_object *obj;
2322 struct drm_crtc *crtc;
2323 struct drm_connector **connector_set = NULL, *connector;
2324 struct drm_framebuffer *fb = NULL;
2325 struct drm_display_mode *mode = NULL;
2326 struct drm_mode_set set;
2327 uint32_t __user *set_connectors_ptr;
2328 int ret;
2329 int i;
2330
2331 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2332 return -EINVAL;
2333
2334 /* For some reason crtc x/y offsets are signed internally. */
2335 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
2336 return -ERANGE;
2337
2338 drm_modeset_lock_all(dev);
2339 obj = drm_mode_object_find(dev, crtc_req->crtc_id,
2340 DRM_MODE_OBJECT_CRTC);
2341 if (!obj) {
2342 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2343 ret = -ENOENT;
2344 goto out;
2345 }
2346 crtc = obj_to_crtc(obj);
2347 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
2348
2349 if (crtc_req->mode_valid) {
2350 /* If we have a mode we need a framebuffer. */
2351 /* If we pass -1, set the mode with the currently bound fb */
2352 if (crtc_req->fb_id == -1) {
2353 if (!crtc->primary->fb) {
2354 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2355 ret = -EINVAL;
2356 goto out;
2357 }
2358 fb = crtc->primary->fb;
2359 /* Make refcounting symmetric with the lookup path. */
2360 drm_framebuffer_reference(fb);
2361 } else {
2362 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2363 if (!fb) {
2364 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2365 crtc_req->fb_id);
2366 ret = -ENOENT;
2367 goto out;
2368 }
2369 }
2370
2371 mode = drm_mode_create(dev);
2372 if (!mode) {
2373 ret = -ENOMEM;
2374 goto out;
2375 }
2376
2377 ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
2378 if (ret) {
2379 DRM_DEBUG_KMS("Invalid mode\n");
2380 goto out;
2381 }
2382
2383 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2384
2385 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2386 mode, fb);
2387 if (ret)
2388 goto out;
2389
2390 }
2391
2392 if (crtc_req->count_connectors == 0 && mode) {
2393 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2394 ret = -EINVAL;
2395 goto out;
2396 }
2397
2398 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2399 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2400 crtc_req->count_connectors);
2401 ret = -EINVAL;
2402 goto out;
2403 }
2404
2405 if (crtc_req->count_connectors > 0) {
2406 u32 out_id;
2407
2408 /* Avoid unbounded kernel memory allocation */
2409 if (crtc_req->count_connectors > config->num_connector) {
2410 ret = -EINVAL;
2411 goto out;
2412 }
2413
2414 connector_set = kmalloc(crtc_req->count_connectors *
2415 sizeof(struct drm_connector *),
2416 GFP_KERNEL);
2417 if (!connector_set) {
2418 ret = -ENOMEM;
2419 goto out;
2420 }
2421
2422 for (i = 0; i < crtc_req->count_connectors; i++) {
2423 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2424 if (get_user(out_id, &set_connectors_ptr[i])) {
2425 ret = -EFAULT;
2426 goto out;
2427 }
2428
2429 obj = drm_mode_object_find(dev, out_id,
2430 DRM_MODE_OBJECT_CONNECTOR);
2431 if (!obj) {
2432 DRM_DEBUG_KMS("Connector id %d unknown\n",
2433 out_id);
2434 ret = -ENOENT;
2435 goto out;
2436 }
2437 connector = obj_to_connector(obj);
2438 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2439 connector->base.id,
2440 drm_get_connector_name(connector));
2441
2442 connector_set[i] = connector;
2443 }
2444 }
2445
2446 set.crtc = crtc;
2447 set.x = crtc_req->x;
2448 set.y = crtc_req->y;
2449 set.mode = mode;
2450 set.connectors = connector_set;
2451 set.num_connectors = crtc_req->count_connectors;
2452 set.fb = fb;
2453 ret = drm_mode_set_config_internal(&set);
2454
2455out:
2456 if (fb)
2457 drm_framebuffer_unreference(fb);
2458
2459 kfree(connector_set);
2460 drm_mode_destroy(dev, mode);
2461 drm_modeset_unlock_all(dev);
2462 return ret;
2463}
2464
2465static int drm_mode_cursor_common(struct drm_device *dev,
2466 struct drm_mode_cursor2 *req,
2467 struct drm_file *file_priv)
2468{
2469 struct drm_mode_object *obj;
2470 struct drm_crtc *crtc;
2471 int ret = 0;
2472
2473 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2474 return -EINVAL;
2475
2476 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2477 return -EINVAL;
2478
2479 obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
2480 if (!obj) {
2481 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2482 return -ENOENT;
2483 }
2484 crtc = obj_to_crtc(obj);
2485
2486 mutex_lock(&crtc->mutex);
2487 if (req->flags & DRM_MODE_CURSOR_BO) {
2488 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
2489 ret = -ENXIO;
2490 goto out;
2491 }
2492 /* Turns off the cursor if handle is 0 */
2493 if (crtc->funcs->cursor_set2)
2494 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2495 req->width, req->height, req->hot_x, req->hot_y);
2496 else
2497 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2498 req->width, req->height);
2499 }
2500
2501 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2502 if (crtc->funcs->cursor_move) {
2503 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2504 } else {
2505 ret = -EFAULT;
2506 goto out;
2507 }
2508 }
2509out:
2510 mutex_unlock(&crtc->mutex);
2511
2512 return ret;
2513
2514}
2515
2516
2517/**
2518 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
2519 * @dev: drm device for the ioctl
2520 * @data: data pointer for the ioctl
2521 * @file_priv: drm file for the ioctl call
2522 *
2523 * Set the cursor configuration based on user request.
2524 *
2525 * Called by the user via ioctl.
2526 *
2527 * Returns:
2528 * Zero on success, errno on failure.
2529 */
2530int drm_mode_cursor_ioctl(struct drm_device *dev,
2531 void *data, struct drm_file *file_priv)
2532{
2533 struct drm_mode_cursor *req = data;
2534 struct drm_mode_cursor2 new_req;
2535
2536 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2537 new_req.hot_x = new_req.hot_y = 0;
2538
2539 return drm_mode_cursor_common(dev, &new_req, file_priv);
2540}
2541
2542/**
2543 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
2544 * @dev: drm device for the ioctl
2545 * @data: data pointer for the ioctl
2546 * @file_priv: drm file for the ioctl call
2547 *
2548 * Set the cursor configuration based on user request. This implements the 2nd
2549 * version of the cursor ioctl, which allows userspace to additionally specify
2550 * the hotspot of the pointer.
2551 *
2552 * Called by the user via ioctl.
2553 *
2554 * Returns:
2555 * Zero on success, errno on failure.
2556 */
2557int drm_mode_cursor2_ioctl(struct drm_device *dev,
2558 void *data, struct drm_file *file_priv)
2559{
2560 struct drm_mode_cursor2 *req = data;
2561 return drm_mode_cursor_common(dev, req, file_priv);
2562}
2563
2564/**
2565 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
2566 * @bpp: bits per pixels
2567 * @depth: bit depth per pixel
2568 *
2569 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
2570 * Useful in fbdev emulation code, since that deals in those values.
2571 */
2572uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2573{
2574 uint32_t fmt;
2575
2576 switch (bpp) {
2577 case 8:
2578 fmt = DRM_FORMAT_C8;
2579 break;
2580 case 16:
2581 if (depth == 15)
2582 fmt = DRM_FORMAT_XRGB1555;
2583 else
2584 fmt = DRM_FORMAT_RGB565;
2585 break;
2586 case 24:
2587 fmt = DRM_FORMAT_RGB888;
2588 break;
2589 case 32:
2590 if (depth == 24)
2591 fmt = DRM_FORMAT_XRGB8888;
2592 else if (depth == 30)
2593 fmt = DRM_FORMAT_XRGB2101010;
2594 else
2595 fmt = DRM_FORMAT_ARGB8888;
2596 break;
2597 default:
2598 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2599 fmt = DRM_FORMAT_XRGB8888;
2600 break;
2601 }
2602
2603 return fmt;
2604}
2605EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2606
2607/**
2608 * drm_mode_addfb - add an FB to the graphics configuration
2609 * @dev: drm device for the ioctl
2610 * @data: data pointer for the ioctl
2611 * @file_priv: drm file for the ioctl call
2612 *
2613 * Add a new FB to the specified CRTC, given a user request. This is the
2614 * original addfb ioclt which only supported RGB formats.
2615 *
2616 * Called by the user via ioctl.
2617 *
2618 * Returns:
2619 * Zero on success, errno on failure.
2620 */
2621int drm_mode_addfb(struct drm_device *dev,
2622 void *data, struct drm_file *file_priv)
2623{
2624 struct drm_mode_fb_cmd *or = data;
2625 struct drm_mode_fb_cmd2 r = {};
2626 struct drm_mode_config *config = &dev->mode_config;
2627 struct drm_framebuffer *fb;
2628 int ret = 0;
2629
2630 /* Use new struct with format internally */
2631 r.fb_id = or->fb_id;
2632 r.width = or->width;
2633 r.height = or->height;
2634 r.pitches[0] = or->pitch;
2635 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
2636 r.handles[0] = or->handle;
2637
2638 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2639 return -EINVAL;
2640
2641 if ((config->min_width > r.width) || (r.width > config->max_width))
2642 return -EINVAL;
2643
2644 if ((config->min_height > r.height) || (r.height > config->max_height))
2645 return -EINVAL;
2646
2647 fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
2648 if (IS_ERR(fb)) {
2649 DRM_DEBUG_KMS("could not create framebuffer\n");
2650 return PTR_ERR(fb);
2651 }
2652
2653 mutex_lock(&file_priv->fbs_lock);
2654 or->fb_id = fb->base.id;
2655 list_add(&fb->filp_head, &file_priv->fbs);
2656 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2657 mutex_unlock(&file_priv->fbs_lock);
2658
2659 return ret;
2660}
2661
2662static int format_check(const struct drm_mode_fb_cmd2 *r)
2663{
2664 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
2665
2666 switch (format) {
2667 case DRM_FORMAT_C8:
2668 case DRM_FORMAT_RGB332:
2669 case DRM_FORMAT_BGR233:
2670 case DRM_FORMAT_XRGB4444:
2671 case DRM_FORMAT_XBGR4444:
2672 case DRM_FORMAT_RGBX4444:
2673 case DRM_FORMAT_BGRX4444:
2674 case DRM_FORMAT_ARGB4444:
2675 case DRM_FORMAT_ABGR4444:
2676 case DRM_FORMAT_RGBA4444:
2677 case DRM_FORMAT_BGRA4444:
2678 case DRM_FORMAT_XRGB1555:
2679 case DRM_FORMAT_XBGR1555:
2680 case DRM_FORMAT_RGBX5551:
2681 case DRM_FORMAT_BGRX5551:
2682 case DRM_FORMAT_ARGB1555:
2683 case DRM_FORMAT_ABGR1555:
2684 case DRM_FORMAT_RGBA5551:
2685 case DRM_FORMAT_BGRA5551:
2686 case DRM_FORMAT_RGB565:
2687 case DRM_FORMAT_BGR565:
2688 case DRM_FORMAT_RGB888:
2689 case DRM_FORMAT_BGR888:
2690 case DRM_FORMAT_XRGB8888:
2691 case DRM_FORMAT_XBGR8888:
2692 case DRM_FORMAT_RGBX8888:
2693 case DRM_FORMAT_BGRX8888:
2694 case DRM_FORMAT_ARGB8888:
2695 case DRM_FORMAT_ABGR8888:
2696 case DRM_FORMAT_RGBA8888:
2697 case DRM_FORMAT_BGRA8888:
2698 case DRM_FORMAT_XRGB2101010:
2699 case DRM_FORMAT_XBGR2101010:
2700 case DRM_FORMAT_RGBX1010102:
2701 case DRM_FORMAT_BGRX1010102:
2702 case DRM_FORMAT_ARGB2101010:
2703 case DRM_FORMAT_ABGR2101010:
2704 case DRM_FORMAT_RGBA1010102:
2705 case DRM_FORMAT_BGRA1010102:
2706 case DRM_FORMAT_YUYV:
2707 case DRM_FORMAT_YVYU:
2708 case DRM_FORMAT_UYVY:
2709 case DRM_FORMAT_VYUY:
2710 case DRM_FORMAT_AYUV:
2711 case DRM_FORMAT_NV12:
2712 case DRM_FORMAT_NV21:
2713 case DRM_FORMAT_NV16:
2714 case DRM_FORMAT_NV61:
2715 case DRM_FORMAT_NV24:
2716 case DRM_FORMAT_NV42:
2717 case DRM_FORMAT_YUV410:
2718 case DRM_FORMAT_YVU410:
2719 case DRM_FORMAT_YUV411:
2720 case DRM_FORMAT_YVU411:
2721 case DRM_FORMAT_YUV420:
2722 case DRM_FORMAT_YVU420:
2723 case DRM_FORMAT_YUV422:
2724 case DRM_FORMAT_YVU422:
2725 case DRM_FORMAT_YUV444:
2726 case DRM_FORMAT_YVU444:
2727 return 0;
2728 default:
2729 DRM_DEBUG_KMS("invalid pixel format %s\n",
2730 drm_get_format_name(r->pixel_format));
2731 return -EINVAL;
2732 }
2733}
2734
2735static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
2736{
2737 int ret, hsub, vsub, num_planes, i;
2738
2739 ret = format_check(r);
2740 if (ret) {
2741 DRM_DEBUG_KMS("bad framebuffer format %s\n",
2742 drm_get_format_name(r->pixel_format));
2743 return ret;
2744 }
2745
2746 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
2747 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
2748 num_planes = drm_format_num_planes(r->pixel_format);
2749
2750 if (r->width == 0 || r->width % hsub) {
2751 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height);
2752 return -EINVAL;
2753 }
2754
2755 if (r->height == 0 || r->height % vsub) {
2756 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
2757 return -EINVAL;
2758 }
2759
2760 for (i = 0; i < num_planes; i++) {
2761 unsigned int width = r->width / (i != 0 ? hsub : 1);
2762 unsigned int height = r->height / (i != 0 ? vsub : 1);
2763 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
2764
2765 if (!r->handles[i]) {
2766 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
2767 return -EINVAL;
2768 }
2769
2770 if ((uint64_t) width * cpp > UINT_MAX)
2771 return -ERANGE;
2772
2773 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
2774 return -ERANGE;
2775
2776 if (r->pitches[i] < width * cpp) {
2777 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
2778 return -EINVAL;
2779 }
2780 }
2781
2782 return 0;
2783}
2784
2785/**
2786 * drm_mode_addfb2 - add an FB to the graphics configuration
2787 * @dev: drm device for the ioctl
2788 * @data: data pointer for the ioctl
2789 * @file_priv: drm file for the ioctl call
2790 *
2791 * Add a new FB to the specified CRTC, given a user request with format. This is
2792 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
2793 * and uses fourcc codes as pixel format specifiers.
2794 *
2795 * Called by the user via ioctl.
2796 *
2797 * Returns:
2798 * Zero on success, errno on failure.
2799 */
2800int drm_mode_addfb2(struct drm_device *dev,
2801 void *data, struct drm_file *file_priv)
2802{
2803 struct drm_mode_fb_cmd2 *r = data;
2804 struct drm_mode_config *config = &dev->mode_config;
2805 struct drm_framebuffer *fb;
2806 int ret;
2807
2808 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2809 return -EINVAL;
2810
2811 if (r->flags & ~DRM_MODE_FB_INTERLACED) {
2812 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
2813 return -EINVAL;
2814 }
2815
2816 if ((config->min_width > r->width) || (r->width > config->max_width)) {
2817 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
2818 r->width, config->min_width, config->max_width);
2819 return -EINVAL;
2820 }
2821 if ((config->min_height > r->height) || (r->height > config->max_height)) {
2822 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
2823 r->height, config->min_height, config->max_height);
2824 return -EINVAL;
2825 }
2826
2827 ret = framebuffer_check(r);
2828 if (ret)
2829 return ret;
2830
2831 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
2832 if (IS_ERR(fb)) {
2833 DRM_DEBUG_KMS("could not create framebuffer\n");
2834 return PTR_ERR(fb);
2835 }
2836
2837 mutex_lock(&file_priv->fbs_lock);
2838 r->fb_id = fb->base.id;
2839 list_add(&fb->filp_head, &file_priv->fbs);
2840 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2841 mutex_unlock(&file_priv->fbs_lock);
2842
2843
2844 return ret;
2845}
2846
2847/**
2848 * drm_mode_rmfb - remove an FB from the configuration
2849 * @dev: drm device for the ioctl
2850 * @data: data pointer for the ioctl
2851 * @file_priv: drm file for the ioctl call
2852 *
2853 * Remove the FB specified by the user.
2854 *
2855 * Called by the user via ioctl.
2856 *
2857 * Returns:
2858 * Zero on success, errno on failure.
2859 */
2860int drm_mode_rmfb(struct drm_device *dev,
2861 void *data, struct drm_file *file_priv)
2862{
2863 struct drm_framebuffer *fb = NULL;
2864 struct drm_framebuffer *fbl = NULL;
2865 uint32_t *id = data;
2866 int found = 0;
2867
2868 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2869 return -EINVAL;
2870
2871 mutex_lock(&file_priv->fbs_lock);
2872 mutex_lock(&dev->mode_config.fb_lock);
2873 fb = __drm_framebuffer_lookup(dev, *id);
2874 if (!fb)
2875 goto fail_lookup;
2876
2877 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
2878 if (fb == fbl)
2879 found = 1;
2880 if (!found)
2881 goto fail_lookup;
2882
2883 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2884 __drm_framebuffer_unregister(dev, fb);
2885
2886 list_del_init(&fb->filp_head);
2887 mutex_unlock(&dev->mode_config.fb_lock);
2888 mutex_unlock(&file_priv->fbs_lock);
2889
2890 drm_framebuffer_remove(fb);
2891
2892 return 0;
2893
2894fail_lookup:
2895 mutex_unlock(&dev->mode_config.fb_lock);
2896 mutex_unlock(&file_priv->fbs_lock);
2897
2898 return -ENOENT;
2899}
2900
2901/**
2902 * drm_mode_getfb - get FB info
2903 * @dev: drm device for the ioctl
2904 * @data: data pointer for the ioctl
2905 * @file_priv: drm file for the ioctl call
2906 *
2907 * Lookup the FB given its ID and return info about it.
2908 *
2909 * Called by the user via ioctl.
2910 *
2911 * Returns:
2912 * Zero on success, errno on failure.
2913 */
2914int drm_mode_getfb(struct drm_device *dev,
2915 void *data, struct drm_file *file_priv)
2916{
2917 struct drm_mode_fb_cmd *r = data;
2918 struct drm_framebuffer *fb;
2919 int ret;
2920
2921 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2922 return -EINVAL;
2923
2924 fb = drm_framebuffer_lookup(dev, r->fb_id);
2925 if (!fb)
2926 return -ENOENT;
2927
2928 r->height = fb->height;
2929 r->width = fb->width;
2930 r->depth = fb->depth;
2931 r->bpp = fb->bits_per_pixel;
2932 r->pitch = fb->pitches[0];
2933 if (fb->funcs->create_handle) {
2934 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
2935 drm_is_control_client(file_priv)) {
2936 ret = fb->funcs->create_handle(fb, file_priv,
2937 &r->handle);
2938 } else {
2939 /* GET_FB() is an unprivileged ioctl so we must not
2940 * return a buffer-handle to non-master processes! For
2941 * backwards-compatibility reasons, we cannot make
2942 * GET_FB() privileged, so just return an invalid handle
2943 * for non-masters. */
2944 r->handle = 0;
2945 ret = 0;
2946 }
2947 } else {
2948 ret = -ENODEV;
2949 }
2950
2951 drm_framebuffer_unreference(fb);
2952
2953 return ret;
2954}
2955
2956/**
2957 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
2958 * @dev: drm device for the ioctl
2959 * @data: data pointer for the ioctl
2960 * @file_priv: drm file for the ioctl call
2961 *
2962 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
2963 * rectangle list. Generic userspace which does frontbuffer rendering must call
2964 * this ioctl to flush out the changes on manual-update display outputs, e.g.
2965 * usb display-link, mipi manual update panels or edp panel self refresh modes.
2966 *
2967 * Modesetting drivers which always update the frontbuffer do not need to
2968 * implement the corresponding ->dirty framebuffer callback.
2969 *
2970 * Called by the user via ioctl.
2971 *
2972 * Returns:
2973 * Zero on success, errno on failure.
2974 */
2975int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
2976 void *data, struct drm_file *file_priv)
2977{
2978 struct drm_clip_rect __user *clips_ptr;
2979 struct drm_clip_rect *clips = NULL;
2980 struct drm_mode_fb_dirty_cmd *r = data;
2981 struct drm_framebuffer *fb;
2982 unsigned flags;
2983 int num_clips;
2984 int ret;
2985
2986 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2987 return -EINVAL;
2988
2989 fb = drm_framebuffer_lookup(dev, r->fb_id);
2990 if (!fb)
2991 return -ENOENT;
2992
2993 num_clips = r->num_clips;
2994 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
2995
2996 if (!num_clips != !clips_ptr) {
2997 ret = -EINVAL;
2998 goto out_err1;
2999 }
3000
3001 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3002
3003 /* If userspace annotates copy, clips must come in pairs */
3004 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3005 ret = -EINVAL;
3006 goto out_err1;
3007 }
3008
3009 if (num_clips && clips_ptr) {
3010 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3011 ret = -EINVAL;
3012 goto out_err1;
3013 }
3014 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
3015 if (!clips) {
3016 ret = -ENOMEM;
3017 goto out_err1;
3018 }
3019
3020 ret = copy_from_user(clips, clips_ptr,
3021 num_clips * sizeof(*clips));
3022 if (ret) {
3023 ret = -EFAULT;
3024 goto out_err2;
3025 }
3026 }
3027
3028 if (fb->funcs->dirty) {
3029 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3030 clips, num_clips);
3031 } else {
3032 ret = -ENOSYS;
3033 }
3034
3035out_err2:
3036 kfree(clips);
3037out_err1:
3038 drm_framebuffer_unreference(fb);
3039
3040 return ret;
3041}
3042
3043
3044/**
3045 * drm_fb_release - remove and free the FBs on this file
3046 * @priv: drm file for the ioctl
3047 *
3048 * Destroy all the FBs associated with @filp.
3049 *
3050 * Called by the user via ioctl.
3051 *
3052 * Returns:
3053 * Zero on success, errno on failure.
3054 */
3055void drm_fb_release(struct drm_file *priv)
3056{
3057 struct drm_device *dev = priv->minor->dev;
3058 struct drm_framebuffer *fb, *tfb;
3059
3060 mutex_lock(&priv->fbs_lock);
3061 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3062
3063 mutex_lock(&dev->mode_config.fb_lock);
3064 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
3065 __drm_framebuffer_unregister(dev, fb);
3066 mutex_unlock(&dev->mode_config.fb_lock);
3067
3068 list_del_init(&fb->filp_head);
3069
3070 /* This will also drop the fpriv->fbs reference. */
3071 drm_framebuffer_remove(fb);
3072 }
3073 mutex_unlock(&priv->fbs_lock);
3074}
3075
3076/**
3077 * drm_property_create - create a new property type
3078 * @dev: drm device
3079 * @flags: flags specifying the property type
3080 * @name: name of the property
3081 * @num_values: number of pre-defined values
3082 *
3083 * This creates a new generic drm property which can then be attached to a drm
3084 * object with drm_object_attach_property. The returned property object must be
3085 * freed with drm_property_destroy.
3086 *
3087 * Returns:
3088 * A pointer to the newly created property on success, NULL on failure.
3089 */
3090struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3091 const char *name, int num_values)
3092{
3093 struct drm_property *property = NULL;
3094 int ret;
3095
3096 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3097 if (!property)
3098 return NULL;
3099
3100 if (num_values) {
3101 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
3102 if (!property->values)
3103 goto fail;
3104 }
3105
3106 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3107 if (ret)
3108 goto fail;
3109
3110 property->flags = flags;
3111 property->num_values = num_values;
3112 INIT_LIST_HEAD(&property->enum_blob_list);
3113
3114 if (name) {
3115 strncpy(property->name, name, DRM_PROP_NAME_LEN);
3116 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3117 }
3118
3119 list_add_tail(&property->head, &dev->mode_config.property_list);
3120 return property;
3121fail:
3122 kfree(property->values);
3123 kfree(property);
3124 return NULL;
3125}
3126EXPORT_SYMBOL(drm_property_create);
3127
3128/**
3129 * drm_property_create - create a new enumeration property type
3130 * @dev: drm device
3131 * @flags: flags specifying the property type
3132 * @name: name of the property
3133 * @props: enumeration lists with property values
3134 * @num_values: number of pre-defined values
3135 *
3136 * This creates a new generic drm property which can then be attached to a drm
3137 * object with drm_object_attach_property. The returned property object must be
3138 * freed with drm_property_destroy.
3139 *
3140 * Userspace is only allowed to set one of the predefined values for enumeration
3141 * properties.
3142 *
3143 * Returns:
3144 * A pointer to the newly created property on success, NULL on failure.
3145 */
3146struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3147 const char *name,
3148 const struct drm_prop_enum_list *props,
3149 int num_values)
3150{
3151 struct drm_property *property;
3152 int i, ret;
3153
3154 flags |= DRM_MODE_PROP_ENUM;
3155
3156 property = drm_property_create(dev, flags, name, num_values);
3157 if (!property)
3158 return NULL;
3159
3160 for (i = 0; i < num_values; i++) {
3161 ret = drm_property_add_enum(property, i,
3162 props[i].type,
3163 props[i].name);
3164 if (ret) {
3165 drm_property_destroy(dev, property);
3166 return NULL;
3167 }
3168 }
3169
3170 return property;
3171}
3172EXPORT_SYMBOL(drm_property_create_enum);
3173
3174/**
3175 * drm_property_create - create a new bitmask property type
3176 * @dev: drm device
3177 * @flags: flags specifying the property type
3178 * @name: name of the property
3179 * @props: enumeration lists with property bitflags
3180 * @num_values: number of pre-defined values
3181 *
3182 * This creates a new generic drm property which can then be attached to a drm
3183 * object with drm_object_attach_property. The returned property object must be
3184 * freed with drm_property_destroy.
3185 *
3186 * Compared to plain enumeration properties userspace is allowed to set any
3187 * or'ed together combination of the predefined property bitflag values
3188 *
3189 * Returns:
3190 * A pointer to the newly created property on success, NULL on failure.
3191 */
3192struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3193 int flags, const char *name,
3194 const struct drm_prop_enum_list *props,
3195 int num_values)
3196{
3197 struct drm_property *property;
3198 int i, ret;
3199
3200 flags |= DRM_MODE_PROP_BITMASK;
3201
3202 property = drm_property_create(dev, flags, name, num_values);
3203 if (!property)
3204 return NULL;
3205
3206 for (i = 0; i < num_values; i++) {
3207 ret = drm_property_add_enum(property, i,
3208 props[i].type,
3209 props[i].name);
3210 if (ret) {
3211 drm_property_destroy(dev, property);
3212 return NULL;
3213 }
3214 }
3215
3216 return property;
3217}
3218EXPORT_SYMBOL(drm_property_create_bitmask);
3219
3220/**
3221 * drm_property_create - create a new ranged property type
3222 * @dev: drm device
3223 * @flags: flags specifying the property type
3224 * @name: name of the property
3225 * @min: minimum value of the property
3226 * @max: maximum value of the property
3227 *
3228 * This creates a new generic drm property which can then be attached to a drm
3229 * object with drm_object_attach_property. The returned property object must be
3230 * freed with drm_property_destroy.
3231 *
3232 * Userspace is allowed to set any interger value in the (min, max) range
3233 * inclusive.
3234 *
3235 * Returns:
3236 * A pointer to the newly created property on success, NULL on failure.
3237 */
3238struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3239 const char *name,
3240 uint64_t min, uint64_t max)
3241{
3242 struct drm_property *property;
3243
3244 flags |= DRM_MODE_PROP_RANGE;
3245
3246 property = drm_property_create(dev, flags, name, 2);
3247 if (!property)
3248 return NULL;
3249
3250 property->values[0] = min;
3251 property->values[1] = max;
3252
3253 return property;
3254}
3255EXPORT_SYMBOL(drm_property_create_range);
3256
3257/**
3258 * drm_property_add_enum - add a possible value to an enumeration property
3259 * @property: enumeration property to change
3260 * @index: index of the new enumeration
3261 * @value: value of the new enumeration
3262 * @name: symbolic name of the new enumeration
3263 *
3264 * This functions adds enumerations to a property.
3265 *
3266 * It's use is deprecated, drivers should use one of the more specific helpers
3267 * to directly create the property with all enumerations already attached.
3268 *
3269 * Returns:
3270 * Zero on success, error code on failure.
3271 */
3272int drm_property_add_enum(struct drm_property *property, int index,
3273 uint64_t value, const char *name)
3274{
3275 struct drm_property_enum *prop_enum;
3276
3277 if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
3278 return -EINVAL;
3279
3280 /*
3281 * Bitmask enum properties have the additional constraint of values
3282 * from 0 to 63
3283 */
3284 if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
3285 return -EINVAL;
3286
3287 if (!list_empty(&property->enum_blob_list)) {
3288 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3289 if (prop_enum->value == value) {
3290 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3291 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3292 return 0;
3293 }
3294 }
3295 }
3296
3297 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3298 if (!prop_enum)
3299 return -ENOMEM;
3300
3301 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3302 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3303 prop_enum->value = value;
3304
3305 property->values[index] = value;
3306 list_add_tail(&prop_enum->head, &property->enum_blob_list);
3307 return 0;
3308}
3309EXPORT_SYMBOL(drm_property_add_enum);
3310
3311/**
3312 * drm_property_destroy - destroy a drm property
3313 * @dev: drm device
3314 * @property: property to destry
3315 *
3316 * This function frees a property including any attached resources like
3317 * enumeration values.
3318 */
3319void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
3320{
3321 struct drm_property_enum *prop_enum, *pt;
3322
3323 list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
3324 list_del(&prop_enum->head);
3325 kfree(prop_enum);
3326 }
3327
3328 if (property->num_values)
3329 kfree(property->values);
3330 drm_mode_object_put(dev, &property->base);
3331 list_del(&property->head);
3332 kfree(property);
3333}
3334EXPORT_SYMBOL(drm_property_destroy);
3335
3336/**
3337 * drm_object_attach_property - attach a property to a modeset object
3338 * @obj: drm modeset object
3339 * @property: property to attach
3340 * @init_val: initial value of the property
3341 *
3342 * This attaches the given property to the modeset object with the given initial
3343 * value. Currently this function cannot fail since the properties are stored in
3344 * a statically sized array.
3345 */
3346void drm_object_attach_property(struct drm_mode_object *obj,
3347 struct drm_property *property,
3348 uint64_t init_val)
3349{
3350 int count = obj->properties->count;
3351
3352 if (count == DRM_OBJECT_MAX_PROPERTY) {
3353 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3354 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3355 "you see this message on the same object type.\n",
3356 obj->type);
3357 return;
3358 }
3359
3360 obj->properties->ids[count] = property->base.id;
3361 obj->properties->values[count] = init_val;
3362 obj->properties->count++;
3363}
3364EXPORT_SYMBOL(drm_object_attach_property);
3365
3366/**
3367 * drm_object_property_set_value - set the value of a property
3368 * @obj: drm mode object to set property value for
3369 * @property: property to set
3370 * @val: value the property should be set to
3371 *
3372 * This functions sets a given property on a given object. This function only
3373 * changes the software state of the property, it does not call into the
3374 * driver's ->set_property callback.
3375 *
3376 * Returns:
3377 * Zero on success, error code on failure.
3378 */
3379int drm_object_property_set_value(struct drm_mode_object *obj,
3380 struct drm_property *property, uint64_t val)
3381{
3382 int i;
3383
3384 for (i = 0; i < obj->properties->count; i++) {
3385 if (obj->properties->ids[i] == property->base.id) {
3386 obj->properties->values[i] = val;
3387 return 0;
3388 }
3389 }
3390
3391 return -EINVAL;
3392}
3393EXPORT_SYMBOL(drm_object_property_set_value);
3394
3395/**
3396 * drm_object_property_get_value - retrieve the value of a property
3397 * @obj: drm mode object to get property value from
3398 * @property: property to retrieve
3399 * @val: storage for the property value
3400 *
3401 * This function retrieves the softare state of the given property for the given
3402 * property. Since there is no driver callback to retrieve the current property
3403 * value this might be out of sync with the hardware, depending upon the driver
3404 * and property.
3405 *
3406 * Returns:
3407 * Zero on success, error code on failure.
3408 */
3409int drm_object_property_get_value(struct drm_mode_object *obj,
3410 struct drm_property *property, uint64_t *val)
3411{
3412 int i;
3413
3414 for (i = 0; i < obj->properties->count; i++) {
3415 if (obj->properties->ids[i] == property->base.id) {
3416 *val = obj->properties->values[i];
3417 return 0;
3418 }
3419 }
3420
3421 return -EINVAL;
3422}
3423EXPORT_SYMBOL(drm_object_property_get_value);
3424
3425/**
3426 * drm_mode_getproperty_ioctl - get the current value of a connector's property
3427 * @dev: DRM device
3428 * @data: ioctl data
3429 * @file_priv: DRM file info
3430 *
3431 * This function retrieves the current value for an connectors's property.
3432 *
3433 * Called by the user via ioctl.
3434 *
3435 * Returns:
3436 * Zero on success, errno on failure.
3437 */
3438int drm_mode_getproperty_ioctl(struct drm_device *dev,
3439 void *data, struct drm_file *file_priv)
3440{
3441 struct drm_mode_object *obj;
3442 struct drm_mode_get_property *out_resp = data;
3443 struct drm_property *property;
3444 int enum_count = 0;
3445 int blob_count = 0;
3446 int value_count = 0;
3447 int ret = 0, i;
3448 int copied;
3449 struct drm_property_enum *prop_enum;
3450 struct drm_mode_property_enum __user *enum_ptr;
3451 struct drm_property_blob *prop_blob;
3452 uint32_t __user *blob_id_ptr;
3453 uint64_t __user *values_ptr;
3454 uint32_t __user *blob_length_ptr;
3455
3456 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3457 return -EINVAL;
3458
3459 drm_modeset_lock_all(dev);
3460 obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
3461 if (!obj) {
3462 ret = -ENOENT;
3463 goto done;
3464 }
3465 property = obj_to_property(obj);
3466
3467 if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3468 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
3469 enum_count++;
3470 } else if (property->flags & DRM_MODE_PROP_BLOB) {
3471 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
3472 blob_count++;
3473 }
3474
3475 value_count = property->num_values;
3476
3477 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
3478 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
3479 out_resp->flags = property->flags;
3480
3481 if ((out_resp->count_values >= value_count) && value_count) {
3482 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
3483 for (i = 0; i < value_count; i++) {
3484 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
3485 ret = -EFAULT;
3486 goto done;
3487 }
3488 }
3489 }
3490 out_resp->count_values = value_count;
3491
3492 if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3493 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
3494 copied = 0;
3495 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3496 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3497
3498 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
3499 ret = -EFAULT;
3500 goto done;
3501 }
3502
3503 if (copy_to_user(&enum_ptr[copied].name,
3504 &prop_enum->name, DRM_PROP_NAME_LEN)) {
3505 ret = -EFAULT;
3506 goto done;
3507 }
3508 copied++;
3509 }
3510 }
3511 out_resp->count_enum_blobs = enum_count;
3512 }
3513
3514 if (property->flags & DRM_MODE_PROP_BLOB) {
3515 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
3516 copied = 0;
3517 blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
3518 blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr;
3519
3520 list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
3521 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
3522 ret = -EFAULT;
3523 goto done;
3524 }
3525
3526 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
3527 ret = -EFAULT;
3528 goto done;
3529 }
3530
3531 copied++;
3532 }
3533 }
3534 out_resp->count_enum_blobs = blob_count;
3535 }
3536done:
3537 drm_modeset_unlock_all(dev);
3538 return ret;
3539}
3540
3541static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
3542 void *data)
3543{
3544 struct drm_property_blob *blob;
3545 int ret;
3546
3547 if (!length || !data)
3548 return NULL;
3549
3550 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
3551 if (!blob)
3552 return NULL;
3553
3554 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
3555 if (ret) {
3556 kfree(blob);
3557 return NULL;
3558 }
3559
3560 blob->length = length;
3561
3562 memcpy(blob->data, data, length);
3563
3564 list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
3565 return blob;
3566}
3567
3568static void drm_property_destroy_blob(struct drm_device *dev,
3569 struct drm_property_blob *blob)
3570{
3571 drm_mode_object_put(dev, &blob->base);
3572 list_del(&blob->head);
3573 kfree(blob);
3574}
3575
3576/**
3577 * drm_mode_getblob_ioctl - get the contents of a blob property value
3578 * @dev: DRM device
3579 * @data: ioctl data
3580 * @file_priv: DRM file info
3581 *
3582 * This function retrieves the contents of a blob property. The value stored in
3583 * an object's blob property is just a normal modeset object id.
3584 *
3585 * Called by the user via ioctl.
3586 *
3587 * Returns:
3588 * Zero on success, errno on failure.
3589 */
3590int drm_mode_getblob_ioctl(struct drm_device *dev,
3591 void *data, struct drm_file *file_priv)
3592{
3593 struct drm_mode_object *obj;
3594 struct drm_mode_get_blob *out_resp = data;
3595 struct drm_property_blob *blob;
3596 int ret = 0;
3597 void __user *blob_ptr;
3598
3599 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3600 return -EINVAL;
3601
3602 drm_modeset_lock_all(dev);
3603 obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
3604 if (!obj) {
3605 ret = -ENOENT;
3606 goto done;
3607 }
3608 blob = obj_to_blob(obj);
3609
3610 if (out_resp->length == blob->length) {
3611 blob_ptr = (void __user *)(unsigned long)out_resp->data;
3612 if (copy_to_user(blob_ptr, blob->data, blob->length)){
3613 ret = -EFAULT;
3614 goto done;
3615 }
3616 }
3617 out_resp->length = blob->length;
3618
3619done:
3620 drm_modeset_unlock_all(dev);
3621 return ret;
3622}
3623
3624/**
3625 * drm_mode_connector_update_edid_property - update the edid property of a connector
3626 * @connector: drm connector
3627 * @edid: new value of the edid property
3628 *
3629 * This function creates a new blob modeset object and assigns its id to the
3630 * connector's edid property.
3631 *
3632 * Returns:
3633 * Zero on success, errno on failure.
3634 */
3635int drm_mode_connector_update_edid_property(struct drm_connector *connector,
3636 struct edid *edid)
3637{
3638 struct drm_device *dev = connector->dev;
3639 int ret, size;
3640
3641 if (connector->edid_blob_ptr)
3642 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
3643
3644 /* Delete edid, when there is none. */
3645 if (!edid) {
3646 connector->edid_blob_ptr = NULL;
3647 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0);
3648 return ret;
3649 }
3650
3651 size = EDID_LENGTH * (1 + edid->extensions);
3652 connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
3653 size, edid);
3654 if (!connector->edid_blob_ptr)
3655 return -EINVAL;
3656
3657 ret = drm_object_property_set_value(&connector->base,
3658 dev->mode_config.edid_property,
3659 connector->edid_blob_ptr->base.id);
3660
3661 return ret;
3662}
3663EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
3664
3665static bool drm_property_change_is_valid(struct drm_property *property,
3666 uint64_t value)
3667{
3668 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
3669 return false;
3670 if (property->flags & DRM_MODE_PROP_RANGE) {
3671 if (value < property->values[0] || value > property->values[1])
3672 return false;
3673 return true;
3674 } else if (property->flags & DRM_MODE_PROP_BITMASK) {
3675 int i;
3676 uint64_t valid_mask = 0;
3677 for (i = 0; i < property->num_values; i++)
3678 valid_mask |= (1ULL << property->values[i]);
3679 return !(value & ~valid_mask);
3680 } else if (property->flags & DRM_MODE_PROP_BLOB) {
3681 /* Only the driver knows */
3682 return true;
3683 } else {
3684 int i;
3685 for (i = 0; i < property->num_values; i++)
3686 if (property->values[i] == value)
3687 return true;
3688 return false;
3689 }
3690}
3691
3692/**
3693 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
3694 * @dev: DRM device
3695 * @data: ioctl data
3696 * @file_priv: DRM file info
3697 *
3698 * This function sets the current value for a connectors's property. It also
3699 * calls into a driver's ->set_property callback to update the hardware state
3700 *
3701 * Called by the user via ioctl.
3702 *
3703 * Returns:
3704 * Zero on success, errno on failure.
3705 */
3706int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
3707 void *data, struct drm_file *file_priv)
3708{
3709 struct drm_mode_connector_set_property *conn_set_prop = data;
3710 struct drm_mode_obj_set_property obj_set_prop = {
3711 .value = conn_set_prop->value,
3712 .prop_id = conn_set_prop->prop_id,
3713 .obj_id = conn_set_prop->connector_id,
3714 .obj_type = DRM_MODE_OBJECT_CONNECTOR
3715 };
3716
3717 /* It does all the locking and checking we need */
3718 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
3719}
3720
3721static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
3722 struct drm_property *property,
3723 uint64_t value)
3724{
3725 int ret = -EINVAL;
3726 struct drm_connector *connector = obj_to_connector(obj);
3727
3728 /* Do DPMS ourselves */
3729 if (property == connector->dev->mode_config.dpms_property) {
3730 if (connector->funcs->dpms)
3731 (*connector->funcs->dpms)(connector, (int)value);
3732 ret = 0;
3733 } else if (connector->funcs->set_property)
3734 ret = connector->funcs->set_property(connector, property, value);
3735
3736 /* store the property value if successful */
3737 if (!ret)
3738 drm_object_property_set_value(&connector->base, property, value);
3739 return ret;
3740}
3741
3742static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
3743 struct drm_property *property,
3744 uint64_t value)
3745{
3746 int ret = -EINVAL;
3747 struct drm_crtc *crtc = obj_to_crtc(obj);
3748
3749 if (crtc->funcs->set_property)
3750 ret = crtc->funcs->set_property(crtc, property, value);
3751 if (!ret)
3752 drm_object_property_set_value(obj, property, value);
3753
3754 return ret;
3755}
3756
3757static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj,
3758 struct drm_property *property,
3759 uint64_t value)
3760{
3761 int ret = -EINVAL;
3762 struct drm_plane *plane = obj_to_plane(obj);
3763
3764 if (plane->funcs->set_property)
3765 ret = plane->funcs->set_property(plane, property, value);
3766 if (!ret)
3767 drm_object_property_set_value(obj, property, value);
3768
3769 return ret;
3770}
3771
3772/**
3773 * drm_mode_getproperty_ioctl - get the current value of a object's property
3774 * @dev: DRM device
3775 * @data: ioctl data
3776 * @file_priv: DRM file info
3777 *
3778 * This function retrieves the current value for an object's property. Compared
3779 * to the connector specific ioctl this one is extended to also work on crtc and
3780 * plane objects.
3781 *
3782 * Called by the user via ioctl.
3783 *
3784 * Returns:
3785 * Zero on success, errno on failure.
3786 */
3787int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
3788 struct drm_file *file_priv)
3789{
3790 struct drm_mode_obj_get_properties *arg = data;
3791 struct drm_mode_object *obj;
3792 int ret = 0;
3793 int i;
3794 int copied = 0;
3795 int props_count = 0;
3796 uint32_t __user *props_ptr;
3797 uint64_t __user *prop_values_ptr;
3798
3799 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3800 return -EINVAL;
3801
3802 drm_modeset_lock_all(dev);
3803
3804 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3805 if (!obj) {
3806 ret = -ENOENT;
3807 goto out;
3808 }
3809 if (!obj->properties) {
3810 ret = -EINVAL;
3811 goto out;
3812 }
3813
3814 props_count = obj->properties->count;
3815
3816 /* This ioctl is called twice, once to determine how much space is
3817 * needed, and the 2nd time to fill it. */
3818 if ((arg->count_props >= props_count) && props_count) {
3819 copied = 0;
3820 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
3821 prop_values_ptr = (uint64_t __user *)(unsigned long)
3822 (arg->prop_values_ptr);
3823 for (i = 0; i < props_count; i++) {
3824 if (put_user(obj->properties->ids[i],
3825 props_ptr + copied)) {
3826 ret = -EFAULT;
3827 goto out;
3828 }
3829 if (put_user(obj->properties->values[i],
3830 prop_values_ptr + copied)) {
3831 ret = -EFAULT;
3832 goto out;
3833 }
3834 copied++;
3835 }
3836 }
3837 arg->count_props = props_count;
3838out:
3839 drm_modeset_unlock_all(dev);
3840 return ret;
3841}
3842
3843/**
3844 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
3845 * @dev: DRM device
3846 * @data: ioctl data
3847 * @file_priv: DRM file info
3848 *
3849 * This function sets the current value for an object's property. It also calls
3850 * into a driver's ->set_property callback to update the hardware state.
3851 * Compared to the connector specific ioctl this one is extended to also work on
3852 * crtc and plane objects.
3853 *
3854 * Called by the user via ioctl.
3855 *
3856 * Returns:
3857 * Zero on success, errno on failure.
3858 */
3859int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
3860 struct drm_file *file_priv)
3861{
3862 struct drm_mode_obj_set_property *arg = data;
3863 struct drm_mode_object *arg_obj;
3864 struct drm_mode_object *prop_obj;
3865 struct drm_property *property;
3866 int ret = -EINVAL;
3867 int i;
3868
3869 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3870 return -EINVAL;
3871
3872 drm_modeset_lock_all(dev);
3873
3874 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3875 if (!arg_obj) {
3876 ret = -ENOENT;
3877 goto out;
3878 }
3879 if (!arg_obj->properties)
3880 goto out;
3881
3882 for (i = 0; i < arg_obj->properties->count; i++)
3883 if (arg_obj->properties->ids[i] == arg->prop_id)
3884 break;
3885
3886 if (i == arg_obj->properties->count)
3887 goto out;
3888
3889 prop_obj = drm_mode_object_find(dev, arg->prop_id,
3890 DRM_MODE_OBJECT_PROPERTY);
3891 if (!prop_obj) {
3892 ret = -ENOENT;
3893 goto out;
3894 }
3895 property = obj_to_property(prop_obj);
3896
3897 if (!drm_property_change_is_valid(property, arg->value))
3898 goto out;
3899
3900 switch (arg_obj->type) {
3901 case DRM_MODE_OBJECT_CONNECTOR:
3902 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
3903 arg->value);
3904 break;
3905 case DRM_MODE_OBJECT_CRTC:
3906 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
3907 break;
3908 case DRM_MODE_OBJECT_PLANE:
3909 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value);
3910 break;
3911 }
3912
3913out:
3914 drm_modeset_unlock_all(dev);
3915 return ret;
3916}
3917
3918/**
3919 * drm_mode_connector_attach_encoder - attach a connector to an encoder
3920 * @connector: connector to attach
3921 * @encoder: encoder to attach @connector to
3922 *
3923 * This function links up a connector to an encoder. Note that the routing
3924 * restrictions between encoders and crtcs are exposed to userspace through the
3925 * possible_clones and possible_crtcs bitmasks.
3926 *
3927 * Returns:
3928 * Zero on success, errno on failure.
3929 */
3930int drm_mode_connector_attach_encoder(struct drm_connector *connector,
3931 struct drm_encoder *encoder)
3932{
3933 int i;
3934
3935 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3936 if (connector->encoder_ids[i] == 0) {
3937 connector->encoder_ids[i] = encoder->base.id;
3938 return 0;
3939 }
3940 }
3941 return -ENOMEM;
3942}
3943EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
3944
3945/**
3946 * drm_mode_crtc_set_gamma_size - set the gamma table size
3947 * @crtc: CRTC to set the gamma table size for
3948 * @gamma_size: size of the gamma table
3949 *
3950 * Drivers which support gamma tables should set this to the supported gamma
3951 * table size when initializing the CRTC. Currently the drm core only supports a
3952 * fixed gamma table size.
3953 *
3954 * Returns:
3955 * Zero on success, errno on failure.
3956 */
3957int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
3958 int gamma_size)
3959{
3960 crtc->gamma_size = gamma_size;
3961
3962 crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
3963 if (!crtc->gamma_store) {
3964 crtc->gamma_size = 0;
3965 return -ENOMEM;
3966 }
3967
3968 return 0;
3969}
3970EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
3971
3972/**
3973 * drm_mode_gamma_set_ioctl - set the gamma table
3974 * @dev: DRM device
3975 * @data: ioctl data
3976 * @file_priv: DRM file info
3977 *
3978 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
3979 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
3980 *
3981 * Called by the user via ioctl.
3982 *
3983 * Returns:
3984 * Zero on success, errno on failure.
3985 */
3986int drm_mode_gamma_set_ioctl(struct drm_device *dev,
3987 void *data, struct drm_file *file_priv)
3988{
3989 struct drm_mode_crtc_lut *crtc_lut = data;
3990 struct drm_mode_object *obj;
3991 struct drm_crtc *crtc;
3992 void *r_base, *g_base, *b_base;
3993 int size;
3994 int ret = 0;
3995
3996 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3997 return -EINVAL;
3998
3999 drm_modeset_lock_all(dev);
4000 obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
4001 if (!obj) {
4002 ret = -ENOENT;
4003 goto out;
4004 }
4005 crtc = obj_to_crtc(obj);
4006
4007 if (crtc->funcs->gamma_set == NULL) {
4008 ret = -ENOSYS;
4009 goto out;
4010 }
4011
4012 /* memcpy into gamma store */
4013 if (crtc_lut->gamma_size != crtc->gamma_size) {
4014 ret = -EINVAL;
4015 goto out;
4016 }
4017
4018 size = crtc_lut->gamma_size * (sizeof(uint16_t));
4019 r_base = crtc->gamma_store;
4020 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
4021 ret = -EFAULT;
4022 goto out;
4023 }
4024
4025 g_base = r_base + size;
4026 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
4027 ret = -EFAULT;
4028 goto out;
4029 }
4030
4031 b_base = g_base + size;
4032 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
4033 ret = -EFAULT;
4034 goto out;
4035 }
4036
4037 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
4038
4039out:
4040 drm_modeset_unlock_all(dev);
4041 return ret;
4042
4043}
4044
4045/**
4046 * drm_mode_gamma_get_ioctl - get the gamma table
4047 * @dev: DRM device
4048 * @data: ioctl data
4049 * @file_priv: DRM file info
4050 *
4051 * Copy the current gamma table into the storage provided. This also provides
4052 * the gamma table size the driver expects, which can be used to size the
4053 * allocated storage.
4054 *
4055 * Called by the user via ioctl.
4056 *
4057 * Returns:
4058 * Zero on success, errno on failure.
4059 */
4060int drm_mode_gamma_get_ioctl(struct drm_device *dev,
4061 void *data, struct drm_file *file_priv)
4062{
4063 struct drm_mode_crtc_lut *crtc_lut = data;
4064 struct drm_mode_object *obj;
4065 struct drm_crtc *crtc;
4066 void *r_base, *g_base, *b_base;
4067 int size;
4068 int ret = 0;
4069
4070 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4071 return -EINVAL;
4072
4073 drm_modeset_lock_all(dev);
4074 obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
4075 if (!obj) {
4076 ret = -ENOENT;
4077 goto out;
4078 }
4079 crtc = obj_to_crtc(obj);
4080
4081 /* memcpy into gamma store */
4082 if (crtc_lut->gamma_size != crtc->gamma_size) {
4083 ret = -EINVAL;
4084 goto out;
4085 }
4086
4087 size = crtc_lut->gamma_size * (sizeof(uint16_t));
4088 r_base = crtc->gamma_store;
4089 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
4090 ret = -EFAULT;
4091 goto out;
4092 }
4093
4094 g_base = r_base + size;
4095 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
4096 ret = -EFAULT;
4097 goto out;
4098 }
4099
4100 b_base = g_base + size;
4101 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
4102 ret = -EFAULT;
4103 goto out;
4104 }
4105out:
4106 drm_modeset_unlock_all(dev);
4107 return ret;
4108}
4109
4110/**
4111 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
4112 * @dev: DRM device
4113 * @data: ioctl data
4114 * @file_priv: DRM file info
4115 *
4116 * This schedules an asynchronous update on a given CRTC, called page flip.
4117 * Optionally a drm event is generated to signal the completion of the event.
4118 * Generic drivers cannot assume that a pageflip with changed framebuffer
4119 * properties (including driver specific metadata like tiling layout) will work,
4120 * but some drivers support e.g. pixel format changes through the pageflip
4121 * ioctl.
4122 *
4123 * Called by the user via ioctl.
4124 *
4125 * Returns:
4126 * Zero on success, errno on failure.
4127 */
4128int drm_mode_page_flip_ioctl(struct drm_device *dev,
4129 void *data, struct drm_file *file_priv)
4130{
4131 struct drm_mode_crtc_page_flip *page_flip = data;
4132 struct drm_mode_object *obj;
4133 struct drm_crtc *crtc;
4134 struct drm_framebuffer *fb = NULL, *old_fb = NULL;
4135 struct drm_pending_vblank_event *e = NULL;
4136 unsigned long flags;
4137 int ret = -EINVAL;
4138
4139 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
4140 page_flip->reserved != 0)
4141 return -EINVAL;
4142
4143 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
4144 return -EINVAL;
4145
4146 obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
4147 if (!obj)
4148 return -ENOENT;
4149 crtc = obj_to_crtc(obj);
4150
4151 mutex_lock(&crtc->mutex);
4152 if (crtc->primary->fb == NULL) {
4153 /* The framebuffer is currently unbound, presumably
4154 * due to a hotplug event, that userspace has not
4155 * yet discovered.
4156 */
4157 ret = -EBUSY;
4158 goto out;
4159 }
4160
4161 if (crtc->funcs->page_flip == NULL)
4162 goto out;
4163
4164 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
4165 if (!fb) {
4166 ret = -ENOENT;
4167 goto out;
4168 }
4169
4170 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
4171 if (ret)
4172 goto out;
4173
4174 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
4175 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
4176 ret = -EINVAL;
4177 goto out;
4178 }
4179
4180 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
4181 ret = -ENOMEM;
4182 spin_lock_irqsave(&dev->event_lock, flags);
4183 if (file_priv->event_space < sizeof e->event) {
4184 spin_unlock_irqrestore(&dev->event_lock, flags);
4185 goto out;
4186 }
4187 file_priv->event_space -= sizeof e->event;
4188 spin_unlock_irqrestore(&dev->event_lock, flags);
4189
4190 e = kzalloc(sizeof *e, GFP_KERNEL);
4191 if (e == NULL) {
4192 spin_lock_irqsave(&dev->event_lock, flags);
4193 file_priv->event_space += sizeof e->event;
4194 spin_unlock_irqrestore(&dev->event_lock, flags);
4195 goto out;
4196 }
4197
4198 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
4199 e->event.base.length = sizeof e->event;
4200 e->event.user_data = page_flip->user_data;
4201 e->base.event = &e->event.base;
4202 e->base.file_priv = file_priv;
4203 e->base.destroy =
4204 (void (*) (struct drm_pending_event *)) kfree;
4205 }
4206
4207 old_fb = crtc->primary->fb;
4208 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
4209 if (ret) {
4210 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
4211 spin_lock_irqsave(&dev->event_lock, flags);
4212 file_priv->event_space += sizeof e->event;
4213 spin_unlock_irqrestore(&dev->event_lock, flags);
4214 kfree(e);
4215 }
4216 /* Keep the old fb, don't unref it. */
4217 old_fb = NULL;
4218 } else {
4219 /*
4220 * Warn if the driver hasn't properly updated the crtc->fb
4221 * field to reflect that the new framebuffer is now used.
4222 * Failing to do so will screw with the reference counting
4223 * on framebuffers.
4224 */
4225 WARN_ON(crtc->primary->fb != fb);
4226 /* Unref only the old framebuffer. */
4227 fb = NULL;
4228 }
4229
4230out:
4231 if (fb)
4232 drm_framebuffer_unreference(fb);
4233 if (old_fb)
4234 drm_framebuffer_unreference(old_fb);
4235 mutex_unlock(&crtc->mutex);
4236
4237 return ret;
4238}
4239
4240/**
4241 * drm_mode_config_reset - call ->reset callbacks
4242 * @dev: drm device
4243 *
4244 * This functions calls all the crtc's, encoder's and connector's ->reset
4245 * callback. Drivers can use this in e.g. their driver load or resume code to
4246 * reset hardware and software state.
4247 */
4248void drm_mode_config_reset(struct drm_device *dev)
4249{
4250 struct drm_crtc *crtc;
4251 struct drm_encoder *encoder;
4252 struct drm_connector *connector;
4253
4254 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
4255 if (crtc->funcs->reset)
4256 crtc->funcs->reset(crtc);
4257
4258 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
4259 if (encoder->funcs->reset)
4260 encoder->funcs->reset(encoder);
4261
4262 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
4263 connector->status = connector_status_unknown;
4264
4265 if (connector->funcs->reset)
4266 connector->funcs->reset(connector);
4267 }
4268}
4269EXPORT_SYMBOL(drm_mode_config_reset);
4270
4271/**
4272 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
4273 * @dev: DRM device
4274 * @data: ioctl data
4275 * @file_priv: DRM file info
4276 *
4277 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
4278 * TTM or something else entirely) and returns the resulting buffer handle. This
4279 * handle can then be wrapped up into a framebuffer modeset object.
4280 *
4281 * Note that userspace is not allowed to use such objects for render
4282 * acceleration - drivers must create their own private ioctls for such a use
4283 * case.
4284 *
4285 * Called by the user via ioctl.
4286 *
4287 * Returns:
4288 * Zero on success, errno on failure.
4289 */
4290int drm_mode_create_dumb_ioctl(struct drm_device *dev,
4291 void *data, struct drm_file *file_priv)
4292{
4293 struct drm_mode_create_dumb *args = data;
4294 u32 cpp, stride, size;
4295
4296 if (!dev->driver->dumb_create)
4297 return -ENOSYS;
4298 if (!args->width || !args->height || !args->bpp)
4299 return -EINVAL;
4300
4301 /* overflow checks for 32bit size calculations */
4302 cpp = DIV_ROUND_UP(args->bpp, 8);
4303 if (cpp > 0xffffffffU / args->width)
4304 return -EINVAL;
4305 stride = cpp * args->width;
4306 if (args->height > 0xffffffffU / stride)
4307 return -EINVAL;
4308
4309 /* test for wrap-around */
4310 size = args->height * stride;
4311 if (PAGE_ALIGN(size) == 0)
4312 return -EINVAL;
4313
4314 return dev->driver->dumb_create(file_priv, dev, args);
4315}
4316
4317/**
4318 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
4319 * @dev: DRM device
4320 * @data: ioctl data
4321 * @file_priv: DRM file info
4322 *
4323 * Allocate an offset in the drm device node's address space to be able to
4324 * memory map a dumb buffer.
4325 *
4326 * Called by the user via ioctl.
4327 *
4328 * Returns:
4329 * Zero on success, errno on failure.
4330 */
4331int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
4332 void *data, struct drm_file *file_priv)
4333{
4334 struct drm_mode_map_dumb *args = data;
4335
4336 /* call driver ioctl to get mmap offset */
4337 if (!dev->driver->dumb_map_offset)
4338 return -ENOSYS;
4339
4340 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
4341}
4342
4343/**
4344 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
4345 * @dev: DRM device
4346 * @data: ioctl data
4347 * @file_priv: DRM file info
4348 *
4349 * This destroys the userspace handle for the given dumb backing storage buffer.
4350 * Since buffer objects must be reference counted in the kernel a buffer object
4351 * won't be immediately freed if a framebuffer modeset object still uses it.
4352 *
4353 * Called by the user via ioctl.
4354 *
4355 * Returns:
4356 * Zero on success, errno on failure.
4357 */
4358int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
4359 void *data, struct drm_file *file_priv)
4360{
4361 struct drm_mode_destroy_dumb *args = data;
4362
4363 if (!dev->driver->dumb_destroy)
4364 return -ENOSYS;
4365
4366 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
4367}
4368
4369/**
4370 * drm_fb_get_bpp_depth - get the bpp/depth values for format
4371 * @format: pixel format (DRM_FORMAT_*)
4372 * @depth: storage for the depth value
4373 * @bpp: storage for the bpp value
4374 *
4375 * This only supports RGB formats here for compat with code that doesn't use
4376 * pixel formats directly yet.
4377 */
4378void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
4379 int *bpp)
4380{
4381 switch (format) {
4382 case DRM_FORMAT_C8:
4383 case DRM_FORMAT_RGB332:
4384 case DRM_FORMAT_BGR233:
4385 *depth = 8;
4386 *bpp = 8;
4387 break;
4388 case DRM_FORMAT_XRGB1555:
4389 case DRM_FORMAT_XBGR1555:
4390 case DRM_FORMAT_RGBX5551:
4391 case DRM_FORMAT_BGRX5551:
4392 case DRM_FORMAT_ARGB1555:
4393 case DRM_FORMAT_ABGR1555:
4394 case DRM_FORMAT_RGBA5551:
4395 case DRM_FORMAT_BGRA5551:
4396 *depth = 15;
4397 *bpp = 16;
4398 break;
4399 case DRM_FORMAT_RGB565:
4400 case DRM_FORMAT_BGR565:
4401 *depth = 16;
4402 *bpp = 16;
4403 break;
4404 case DRM_FORMAT_RGB888:
4405 case DRM_FORMAT_BGR888:
4406 *depth = 24;
4407 *bpp = 24;
4408 break;
4409 case DRM_FORMAT_XRGB8888:
4410 case DRM_FORMAT_XBGR8888:
4411 case DRM_FORMAT_RGBX8888:
4412 case DRM_FORMAT_BGRX8888:
4413 *depth = 24;
4414 *bpp = 32;
4415 break;
4416 case DRM_FORMAT_XRGB2101010:
4417 case DRM_FORMAT_XBGR2101010:
4418 case DRM_FORMAT_RGBX1010102:
4419 case DRM_FORMAT_BGRX1010102:
4420 case DRM_FORMAT_ARGB2101010:
4421 case DRM_FORMAT_ABGR2101010:
4422 case DRM_FORMAT_RGBA1010102:
4423 case DRM_FORMAT_BGRA1010102:
4424 *depth = 30;
4425 *bpp = 32;
4426 break;
4427 case DRM_FORMAT_ARGB8888:
4428 case DRM_FORMAT_ABGR8888:
4429 case DRM_FORMAT_RGBA8888:
4430 case DRM_FORMAT_BGRA8888:
4431 *depth = 32;
4432 *bpp = 32;
4433 break;
4434 default:
4435 DRM_DEBUG_KMS("unsupported pixel format %s\n",
4436 drm_get_format_name(format));
4437 *depth = 0;
4438 *bpp = 0;
4439 break;
4440 }
4441}
4442EXPORT_SYMBOL(drm_fb_get_bpp_depth);
4443
4444/**
4445 * drm_format_num_planes - get the number of planes for format
4446 * @format: pixel format (DRM_FORMAT_*)
4447 *
4448 * Returns:
4449 * The number of planes used by the specified pixel format.
4450 */
4451int drm_format_num_planes(uint32_t format)
4452{
4453 switch (format) {
4454 case DRM_FORMAT_YUV410:
4455 case DRM_FORMAT_YVU410:
4456 case DRM_FORMAT_YUV411:
4457 case DRM_FORMAT_YVU411:
4458 case DRM_FORMAT_YUV420:
4459 case DRM_FORMAT_YVU420:
4460 case DRM_FORMAT_YUV422:
4461 case DRM_FORMAT_YVU422:
4462 case DRM_FORMAT_YUV444:
4463 case DRM_FORMAT_YVU444:
4464 return 3;
4465 case DRM_FORMAT_NV12:
4466 case DRM_FORMAT_NV21:
4467 case DRM_FORMAT_NV16:
4468 case DRM_FORMAT_NV61:
4469 case DRM_FORMAT_NV24:
4470 case DRM_FORMAT_NV42:
4471 return 2;
4472 default:
4473 return 1;
4474 }
4475}
4476EXPORT_SYMBOL(drm_format_num_planes);
4477
4478/**
4479 * drm_format_plane_cpp - determine the bytes per pixel value
4480 * @format: pixel format (DRM_FORMAT_*)
4481 * @plane: plane index
4482 *
4483 * Returns:
4484 * The bytes per pixel value for the specified plane.
4485 */
4486int drm_format_plane_cpp(uint32_t format, int plane)
4487{
4488 unsigned int depth;
4489 int bpp;
4490
4491 if (plane >= drm_format_num_planes(format))
4492 return 0;
4493
4494 switch (format) {
4495 case DRM_FORMAT_YUYV:
4496 case DRM_FORMAT_YVYU:
4497 case DRM_FORMAT_UYVY:
4498 case DRM_FORMAT_VYUY:
4499 return 2;
4500 case DRM_FORMAT_NV12:
4501 case DRM_FORMAT_NV21:
4502 case DRM_FORMAT_NV16:
4503 case DRM_FORMAT_NV61:
4504 case DRM_FORMAT_NV24:
4505 case DRM_FORMAT_NV42:
4506 return plane ? 2 : 1;
4507 case DRM_FORMAT_YUV410:
4508 case DRM_FORMAT_YVU410:
4509 case DRM_FORMAT_YUV411:
4510 case DRM_FORMAT_YVU411:
4511 case DRM_FORMAT_YUV420:
4512 case DRM_FORMAT_YVU420:
4513 case DRM_FORMAT_YUV422:
4514 case DRM_FORMAT_YVU422:
4515 case DRM_FORMAT_YUV444:
4516 case DRM_FORMAT_YVU444:
4517 return 1;
4518 default:
4519 drm_fb_get_bpp_depth(format, &depth, &bpp);
4520 return bpp >> 3;
4521 }
4522}
4523EXPORT_SYMBOL(drm_format_plane_cpp);
4524
4525/**
4526 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
4527 * @format: pixel format (DRM_FORMAT_*)
4528 *
4529 * Returns:
4530 * The horizontal chroma subsampling factor for the
4531 * specified pixel format.
4532 */
4533int drm_format_horz_chroma_subsampling(uint32_t format)
4534{
4535 switch (format) {
4536 case DRM_FORMAT_YUV411:
4537 case DRM_FORMAT_YVU411:
4538 case DRM_FORMAT_YUV410:
4539 case DRM_FORMAT_YVU410:
4540 return 4;
4541 case DRM_FORMAT_YUYV:
4542 case DRM_FORMAT_YVYU:
4543 case DRM_FORMAT_UYVY:
4544 case DRM_FORMAT_VYUY:
4545 case DRM_FORMAT_NV12:
4546 case DRM_FORMAT_NV21:
4547 case DRM_FORMAT_NV16:
4548 case DRM_FORMAT_NV61:
4549 case DRM_FORMAT_YUV422:
4550 case DRM_FORMAT_YVU422:
4551 case DRM_FORMAT_YUV420:
4552 case DRM_FORMAT_YVU420:
4553 return 2;
4554 default:
4555 return 1;
4556 }
4557}
4558EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
4559
4560/**
4561 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
4562 * @format: pixel format (DRM_FORMAT_*)
4563 *
4564 * Returns:
4565 * The vertical chroma subsampling factor for the
4566 * specified pixel format.
4567 */
4568int drm_format_vert_chroma_subsampling(uint32_t format)
4569{
4570 switch (format) {
4571 case DRM_FORMAT_YUV410:
4572 case DRM_FORMAT_YVU410:
4573 return 4;
4574 case DRM_FORMAT_YUV420:
4575 case DRM_FORMAT_YVU420:
4576 case DRM_FORMAT_NV12:
4577 case DRM_FORMAT_NV21:
4578 return 2;
4579 default:
4580 return 1;
4581 }
4582}
4583EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
4584
4585/**
4586 * drm_mode_config_init - initialize DRM mode_configuration structure
4587 * @dev: DRM device
4588 *
4589 * Initialize @dev's mode_config structure, used for tracking the graphics
4590 * configuration of @dev.
4591 *
4592 * Since this initializes the modeset locks, no locking is possible. Which is no
4593 * problem, since this should happen single threaded at init time. It is the
4594 * driver's problem to ensure this guarantee.
4595 *
4596 */
4597void drm_mode_config_init(struct drm_device *dev)
4598{
4599 mutex_init(&dev->mode_config.mutex);
4600 mutex_init(&dev->mode_config.idr_mutex);
4601 mutex_init(&dev->mode_config.fb_lock);
4602 INIT_LIST_HEAD(&dev->mode_config.fb_list);
4603 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
4604 INIT_LIST_HEAD(&dev->mode_config.connector_list);
4605 INIT_LIST_HEAD(&dev->mode_config.bridge_list);
4606 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
4607 INIT_LIST_HEAD(&dev->mode_config.property_list);
4608 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
4609 INIT_LIST_HEAD(&dev->mode_config.plane_list);
4610 idr_init(&dev->mode_config.crtc_idr);
4611
4612 drm_modeset_lock_all(dev);
4613 drm_mode_create_standard_connector_properties(dev);
4614 drm_mode_create_standard_plane_properties(dev);
4615 drm_modeset_unlock_all(dev);
4616
4617 /* Just to be sure */
4618 dev->mode_config.num_fb = 0;
4619 dev->mode_config.num_connector = 0;
4620 dev->mode_config.num_crtc = 0;
4621 dev->mode_config.num_encoder = 0;
4622 dev->mode_config.num_overlay_plane = 0;
4623 dev->mode_config.num_total_plane = 0;
4624}
4625EXPORT_SYMBOL(drm_mode_config_init);
4626
4627/**
4628 * drm_mode_config_cleanup - free up DRM mode_config info
4629 * @dev: DRM device
4630 *
4631 * Free up all the connectors and CRTCs associated with this DRM device, then
4632 * free up the framebuffers and associated buffer objects.
4633 *
4634 * Note that since this /should/ happen single-threaded at driver/device
4635 * teardown time, no locking is required. It's the driver's job to ensure that
4636 * this guarantee actually holds true.
4637 *
4638 * FIXME: cleanup any dangling user buffer objects too
4639 */
4640void drm_mode_config_cleanup(struct drm_device *dev)
4641{
4642 struct drm_connector *connector, *ot;
4643 struct drm_crtc *crtc, *ct;
4644 struct drm_encoder *encoder, *enct;
4645 struct drm_bridge *bridge, *brt;
4646 struct drm_framebuffer *fb, *fbt;
4647 struct drm_property *property, *pt;
4648 struct drm_property_blob *blob, *bt;
4649 struct drm_plane *plane, *plt;
4650
4651 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
4652 head) {
4653 encoder->funcs->destroy(encoder);
4654 }
4655
4656 list_for_each_entry_safe(bridge, brt,
4657 &dev->mode_config.bridge_list, head) {
4658 bridge->funcs->destroy(bridge);
4659 }
4660
4661 list_for_each_entry_safe(connector, ot,
4662 &dev->mode_config.connector_list, head) {
4663 connector->funcs->destroy(connector);
4664 }
4665
4666 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
4667 head) {
4668 drm_property_destroy(dev, property);
4669 }
4670
4671 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
4672 head) {
4673 drm_property_destroy_blob(dev, blob);
4674 }
4675
4676 /*
4677 * Single-threaded teardown context, so it's not required to grab the
4678 * fb_lock to protect against concurrent fb_list access. Contrary, it
4679 * would actually deadlock with the drm_framebuffer_cleanup function.
4680 *
4681 * Also, if there are any framebuffers left, that's a driver leak now,
4682 * so politely WARN about this.
4683 */
4684 WARN_ON(!list_empty(&dev->mode_config.fb_list));
4685 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
4686 drm_framebuffer_remove(fb);
4687 }
4688
4689 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
4690 head) {
4691 plane->funcs->destroy(plane);
4692 }
4693
4694 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
4695 crtc->funcs->destroy(crtc);
4696 }
4697
4698 idr_destroy(&dev->mode_config.crtc_idr);
4699}
4700EXPORT_SYMBOL(drm_mode_config_cleanup);