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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 <linux/dma-fence.h>
37#include <linux/uaccess.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_edid.h>
40#include <drm/drm_fourcc.h>
41#include <drm/drm_modeset_lock.h>
42#include <drm/drm_atomic.h>
43#include <drm/drm_auth.h>
44#include <drm/drm_debugfs_crc.h>
45#include <drm/drm_drv.h>
46#include <drm/drm_print.h>
47#include <drm/drm_file.h>
48
49#include "drm_crtc_internal.h"
50#include "drm_internal.h"
51
52/**
53 * DOC: overview
54 *
55 * A CRTC represents the overall display pipeline. It receives pixel data from
56 * &drm_plane and blends them together. The &drm_display_mode is also attached
57 * to the CRTC, specifying display timings. On the output side the data is fed
58 * to one or more &drm_encoder, which are then each connected to one
59 * &drm_connector.
60 *
61 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
62 * &struct drm_crtc (possibly as part of a larger structure) and registers it
63 * with a call to drm_crtc_init_with_planes().
64 *
65 * The CRTC is also the entry point for legacy modeset operations, see
66 * &drm_crtc_funcs.set_config, legacy plane operations, see
67 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
68 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
69 * features are controlled through &drm_property and
70 * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check.
71 */
72
73/**
74 * drm_crtc_from_index - find the registered CRTC at an index
75 * @dev: DRM device
76 * @idx: index of registered CRTC to find for
77 *
78 * Given a CRTC index, return the registered CRTC from DRM device's
79 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
80 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
81 * &drm_driver.disable_vblank), since that still deals with indices instead
82 * of pointers to &struct drm_crtc."
83 */
84struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
85{
86 struct drm_crtc *crtc;
87
88 drm_for_each_crtc(crtc, dev)
89 if (idx == crtc->index)
90 return crtc;
91
92 return NULL;
93}
94EXPORT_SYMBOL(drm_crtc_from_index);
95
96int drm_crtc_force_disable(struct drm_crtc *crtc)
97{
98 struct drm_mode_set set = {
99 .crtc = crtc,
100 };
101
102 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
103
104 return drm_mode_set_config_internal(&set);
105}
106
107static unsigned int drm_num_crtcs(struct drm_device *dev)
108{
109 unsigned int num = 0;
110 struct drm_crtc *tmp;
111
112 drm_for_each_crtc(tmp, dev) {
113 num++;
114 }
115
116 return num;
117}
118
119int drm_crtc_register_all(struct drm_device *dev)
120{
121 struct drm_crtc *crtc;
122 int ret = 0;
123
124 drm_for_each_crtc(crtc, dev) {
125 drm_debugfs_crtc_add(crtc);
126
127 if (crtc->funcs->late_register)
128 ret = crtc->funcs->late_register(crtc);
129 if (ret)
130 return ret;
131 }
132
133 return 0;
134}
135
136void drm_crtc_unregister_all(struct drm_device *dev)
137{
138 struct drm_crtc *crtc;
139
140 drm_for_each_crtc(crtc, dev) {
141 if (crtc->funcs->early_unregister)
142 crtc->funcs->early_unregister(crtc);
143 drm_debugfs_crtc_remove(crtc);
144 }
145}
146
147static int drm_crtc_crc_init(struct drm_crtc *crtc)
148{
149#ifdef CONFIG_DEBUG_FS
150 spin_lock_init(&crtc->crc.lock);
151 init_waitqueue_head(&crtc->crc.wq);
152 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
153 if (!crtc->crc.source)
154 return -ENOMEM;
155#endif
156 return 0;
157}
158
159static void drm_crtc_crc_fini(struct drm_crtc *crtc)
160{
161#ifdef CONFIG_DEBUG_FS
162 kfree(crtc->crc.source);
163#endif
164}
165
166static const struct dma_fence_ops drm_crtc_fence_ops;
167
168static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
169{
170 BUG_ON(fence->ops != &drm_crtc_fence_ops);
171 return container_of(fence->lock, struct drm_crtc, fence_lock);
172}
173
174static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
175{
176 struct drm_crtc *crtc = fence_to_crtc(fence);
177
178 return crtc->dev->driver->name;
179}
180
181static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
182{
183 struct drm_crtc *crtc = fence_to_crtc(fence);
184
185 return crtc->timeline_name;
186}
187
188static const struct dma_fence_ops drm_crtc_fence_ops = {
189 .get_driver_name = drm_crtc_fence_get_driver_name,
190 .get_timeline_name = drm_crtc_fence_get_timeline_name,
191};
192
193struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
194{
195 struct dma_fence *fence;
196
197 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
198 if (!fence)
199 return NULL;
200
201 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
202 crtc->fence_context, ++crtc->fence_seqno);
203
204 return fence;
205}
206
207/**
208 * DOC: standard CRTC properties
209 *
210 * DRM CRTCs have a few standardized properties:
211 *
212 * ACTIVE:
213 * Atomic property for setting the power state of the CRTC. When set to 1
214 * the CRTC will actively display content. When set to 0 the CRTC will be
215 * powered off. There is no expectation that user-space will reset CRTC
216 * resources like the mode and planes when setting ACTIVE to 0.
217 *
218 * User-space can rely on an ACTIVE change to 1 to never fail an atomic
219 * test as long as no other property has changed. If a change to ACTIVE
220 * fails an atomic test, this is a driver bug. For this reason setting
221 * ACTIVE to 0 must not release internal resources (like reserved memory
222 * bandwidth or clock generators).
223 *
224 * Note that the legacy DPMS property on connectors is internally routed
225 * to control this property for atomic drivers.
226 * MODE_ID:
227 * Atomic property for setting the CRTC display timings. The value is the
228 * ID of a blob containing the DRM mode info. To disable the CRTC,
229 * user-space must set this property to 0.
230 *
231 * Setting MODE_ID to 0 will release reserved resources for the CRTC.
232 */
233
234/**
235 * drm_crtc_init_with_planes - Initialise a new CRTC object with
236 * specified primary and cursor planes.
237 * @dev: DRM device
238 * @crtc: CRTC object to init
239 * @primary: Primary plane for CRTC
240 * @cursor: Cursor plane for CRTC
241 * @funcs: callbacks for the new CRTC
242 * @name: printf style format string for the CRTC name, or NULL for default name
243 *
244 * Inits a new object created as base part of a driver crtc object. Drivers
245 * should use this function instead of drm_crtc_init(), which is only provided
246 * for backwards compatibility with drivers which do not yet support universal
247 * planes). For really simple hardware which has only 1 plane look at
248 * drm_simple_display_pipe_init() instead.
249 *
250 * Returns:
251 * Zero on success, error code on failure.
252 */
253int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
254 struct drm_plane *primary,
255 struct drm_plane *cursor,
256 const struct drm_crtc_funcs *funcs,
257 const char *name, ...)
258{
259 struct drm_mode_config *config = &dev->mode_config;
260 int ret;
261
262 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
263 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
264
265 /* crtc index is used with 32bit bitmasks */
266 if (WARN_ON(config->num_crtc >= 32))
267 return -EINVAL;
268
269 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
270 (!funcs->atomic_destroy_state ||
271 !funcs->atomic_duplicate_state));
272
273 crtc->dev = dev;
274 crtc->funcs = funcs;
275
276 INIT_LIST_HEAD(&crtc->commit_list);
277 spin_lock_init(&crtc->commit_lock);
278
279 drm_modeset_lock_init(&crtc->mutex);
280 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
281 if (ret)
282 return ret;
283
284 if (name) {
285 va_list ap;
286
287 va_start(ap, name);
288 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
289 va_end(ap);
290 } else {
291 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
292 drm_num_crtcs(dev));
293 }
294 if (!crtc->name) {
295 drm_mode_object_unregister(dev, &crtc->base);
296 return -ENOMEM;
297 }
298
299 crtc->fence_context = dma_fence_context_alloc(1);
300 spin_lock_init(&crtc->fence_lock);
301 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
302 "CRTC:%d-%s", crtc->base.id, crtc->name);
303
304 crtc->base.properties = &crtc->properties;
305
306 list_add_tail(&crtc->head, &config->crtc_list);
307 crtc->index = config->num_crtc++;
308
309 crtc->primary = primary;
310 crtc->cursor = cursor;
311 if (primary && !primary->possible_crtcs)
312 primary->possible_crtcs = drm_crtc_mask(crtc);
313 if (cursor && !cursor->possible_crtcs)
314 cursor->possible_crtcs = drm_crtc_mask(crtc);
315
316 ret = drm_crtc_crc_init(crtc);
317 if (ret) {
318 drm_mode_object_unregister(dev, &crtc->base);
319 return ret;
320 }
321
322 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
323 drm_object_attach_property(&crtc->base, config->prop_active, 0);
324 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
325 drm_object_attach_property(&crtc->base,
326 config->prop_out_fence_ptr, 0);
327 drm_object_attach_property(&crtc->base,
328 config->prop_vrr_enabled, 0);
329 }
330
331 return 0;
332}
333EXPORT_SYMBOL(drm_crtc_init_with_planes);
334
335/**
336 * drm_crtc_cleanup - Clean up the core crtc usage
337 * @crtc: CRTC to cleanup
338 *
339 * This function cleans up @crtc and removes it from the DRM mode setting
340 * core. Note that the function does *not* free the crtc structure itself,
341 * this is the responsibility of the caller.
342 */
343void drm_crtc_cleanup(struct drm_crtc *crtc)
344{
345 struct drm_device *dev = crtc->dev;
346
347 /* Note that the crtc_list is considered to be static; should we
348 * remove the drm_crtc at runtime we would have to decrement all
349 * the indices on the drm_crtc after us in the crtc_list.
350 */
351
352 drm_crtc_crc_fini(crtc);
353
354 kfree(crtc->gamma_store);
355 crtc->gamma_store = NULL;
356
357 drm_modeset_lock_fini(&crtc->mutex);
358
359 drm_mode_object_unregister(dev, &crtc->base);
360 list_del(&crtc->head);
361 dev->mode_config.num_crtc--;
362
363 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
364 if (crtc->state && crtc->funcs->atomic_destroy_state)
365 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
366
367 kfree(crtc->name);
368
369 memset(crtc, 0, sizeof(*crtc));
370}
371EXPORT_SYMBOL(drm_crtc_cleanup);
372
373/**
374 * drm_mode_getcrtc - get CRTC configuration
375 * @dev: drm device for the ioctl
376 * @data: data pointer for the ioctl
377 * @file_priv: drm file for the ioctl call
378 *
379 * Construct a CRTC configuration structure to return to the user.
380 *
381 * Called by the user via ioctl.
382 *
383 * Returns:
384 * Zero on success, negative errno on failure.
385 */
386int drm_mode_getcrtc(struct drm_device *dev,
387 void *data, struct drm_file *file_priv)
388{
389 struct drm_mode_crtc *crtc_resp = data;
390 struct drm_crtc *crtc;
391 struct drm_plane *plane;
392
393 if (!drm_core_check_feature(dev, DRIVER_MODESET))
394 return -EOPNOTSUPP;
395
396 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
397 if (!crtc)
398 return -ENOENT;
399
400 plane = crtc->primary;
401
402 crtc_resp->gamma_size = crtc->gamma_size;
403
404 drm_modeset_lock(&plane->mutex, NULL);
405 if (plane->state && plane->state->fb)
406 crtc_resp->fb_id = plane->state->fb->base.id;
407 else if (!plane->state && plane->fb)
408 crtc_resp->fb_id = plane->fb->base.id;
409 else
410 crtc_resp->fb_id = 0;
411
412 if (plane->state) {
413 crtc_resp->x = plane->state->src_x >> 16;
414 crtc_resp->y = plane->state->src_y >> 16;
415 }
416 drm_modeset_unlock(&plane->mutex);
417
418 drm_modeset_lock(&crtc->mutex, NULL);
419 if (crtc->state) {
420 if (crtc->state->enable) {
421 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
422 crtc_resp->mode_valid = 1;
423 } else {
424 crtc_resp->mode_valid = 0;
425 }
426 } else {
427 crtc_resp->x = crtc->x;
428 crtc_resp->y = crtc->y;
429
430 if (crtc->enabled) {
431 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
432 crtc_resp->mode_valid = 1;
433
434 } else {
435 crtc_resp->mode_valid = 0;
436 }
437 }
438 if (!file_priv->aspect_ratio_allowed)
439 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
440 drm_modeset_unlock(&crtc->mutex);
441
442 return 0;
443}
444
445static int __drm_mode_set_config_internal(struct drm_mode_set *set,
446 struct drm_modeset_acquire_ctx *ctx)
447{
448 struct drm_crtc *crtc = set->crtc;
449 struct drm_framebuffer *fb;
450 struct drm_crtc *tmp;
451 int ret;
452
453 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
454
455 /*
456 * NOTE: ->set_config can also disable other crtcs (if we steal all
457 * connectors from it), hence we need to refcount the fbs across all
458 * crtcs. Atomic modeset will have saner semantics ...
459 */
460 drm_for_each_crtc(tmp, crtc->dev) {
461 struct drm_plane *plane = tmp->primary;
462
463 plane->old_fb = plane->fb;
464 }
465
466 fb = set->fb;
467
468 ret = crtc->funcs->set_config(set, ctx);
469 if (ret == 0) {
470 struct drm_plane *plane = crtc->primary;
471
472 plane->crtc = fb ? crtc : NULL;
473 plane->fb = fb;
474 }
475
476 drm_for_each_crtc(tmp, crtc->dev) {
477 struct drm_plane *plane = tmp->primary;
478
479 if (plane->fb)
480 drm_framebuffer_get(plane->fb);
481 if (plane->old_fb)
482 drm_framebuffer_put(plane->old_fb);
483 plane->old_fb = NULL;
484 }
485
486 return ret;
487}
488
489/**
490 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
491 * @set: modeset config to set
492 *
493 * This is a little helper to wrap internal calls to the
494 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
495 * correct refcounting dance.
496 *
497 * This should only be used by non-atomic legacy drivers.
498 *
499 * Returns:
500 * Zero on success, negative errno on failure.
501 */
502int drm_mode_set_config_internal(struct drm_mode_set *set)
503{
504 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
505
506 return __drm_mode_set_config_internal(set, NULL);
507}
508EXPORT_SYMBOL(drm_mode_set_config_internal);
509
510/**
511 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
512 * CRTC viewport
513 * @crtc: CRTC that framebuffer will be displayed on
514 * @x: x panning
515 * @y: y panning
516 * @mode: mode that framebuffer will be displayed under
517 * @fb: framebuffer to check size of
518 */
519int drm_crtc_check_viewport(const struct drm_crtc *crtc,
520 int x, int y,
521 const struct drm_display_mode *mode,
522 const struct drm_framebuffer *fb)
523
524{
525 int hdisplay, vdisplay;
526
527 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
528
529 if (crtc->state &&
530 drm_rotation_90_or_270(crtc->primary->state->rotation))
531 swap(hdisplay, vdisplay);
532
533 return drm_framebuffer_check_src_coords(x << 16, y << 16,
534 hdisplay << 16, vdisplay << 16,
535 fb);
536}
537EXPORT_SYMBOL(drm_crtc_check_viewport);
538
539/**
540 * drm_mode_setcrtc - set CRTC configuration
541 * @dev: drm device for the ioctl
542 * @data: data pointer for the ioctl
543 * @file_priv: drm file for the ioctl call
544 *
545 * Build a new CRTC configuration based on user request.
546 *
547 * Called by the user via ioctl.
548 *
549 * Returns:
550 * Zero on success, negative errno on failure.
551 */
552int drm_mode_setcrtc(struct drm_device *dev, void *data,
553 struct drm_file *file_priv)
554{
555 struct drm_mode_config *config = &dev->mode_config;
556 struct drm_mode_crtc *crtc_req = data;
557 struct drm_crtc *crtc;
558 struct drm_plane *plane;
559 struct drm_connector **connector_set = NULL, *connector;
560 struct drm_framebuffer *fb = NULL;
561 struct drm_display_mode *mode = NULL;
562 struct drm_mode_set set;
563 uint32_t __user *set_connectors_ptr;
564 struct drm_modeset_acquire_ctx ctx;
565 int ret;
566 int i;
567
568 if (!drm_core_check_feature(dev, DRIVER_MODESET))
569 return -EOPNOTSUPP;
570
571 /*
572 * Universal plane src offsets are only 16.16, prevent havoc for
573 * drivers using universal plane code internally.
574 */
575 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
576 return -ERANGE;
577
578 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
579 if (!crtc) {
580 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
581 return -ENOENT;
582 }
583 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
584
585 plane = crtc->primary;
586
587 /* allow disabling with the primary plane leased */
588 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
589 return -EACCES;
590
591 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
592 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
593
594 if (crtc_req->mode_valid) {
595 /* If we have a mode we need a framebuffer. */
596 /* If we pass -1, set the mode with the currently bound fb */
597 if (crtc_req->fb_id == -1) {
598 struct drm_framebuffer *old_fb;
599
600 if (plane->state)
601 old_fb = plane->state->fb;
602 else
603 old_fb = plane->fb;
604
605 if (!old_fb) {
606 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
607 ret = -EINVAL;
608 goto out;
609 }
610
611 fb = old_fb;
612 /* Make refcounting symmetric with the lookup path. */
613 drm_framebuffer_get(fb);
614 } else {
615 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
616 if (!fb) {
617 DRM_DEBUG_KMS("Unknown FB ID%d\n",
618 crtc_req->fb_id);
619 ret = -ENOENT;
620 goto out;
621 }
622 }
623
624 mode = drm_mode_create(dev);
625 if (!mode) {
626 ret = -ENOMEM;
627 goto out;
628 }
629 if (!file_priv->aspect_ratio_allowed &&
630 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
631 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
632 ret = -EINVAL;
633 goto out;
634 }
635
636
637 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
638 if (ret) {
639 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
640 ret, drm_get_mode_status_name(mode->status));
641 drm_mode_debug_printmodeline(mode);
642 goto out;
643 }
644
645 /*
646 * Check whether the primary plane supports the fb pixel format.
647 * Drivers not implementing the universal planes API use a
648 * default formats list provided by the DRM core which doesn't
649 * match real hardware capabilities. Skip the check in that
650 * case.
651 */
652 if (!plane->format_default) {
653 ret = drm_plane_check_pixel_format(plane,
654 fb->format->format,
655 fb->modifier);
656 if (ret) {
657 struct drm_format_name_buf format_name;
658
659 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
660 drm_get_format_name(fb->format->format,
661 &format_name),
662 fb->modifier);
663 goto out;
664 }
665 }
666
667 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
668 mode, fb);
669 if (ret)
670 goto out;
671
672 }
673
674 if (crtc_req->count_connectors == 0 && mode) {
675 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
676 ret = -EINVAL;
677 goto out;
678 }
679
680 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
681 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
682 crtc_req->count_connectors);
683 ret = -EINVAL;
684 goto out;
685 }
686
687 if (crtc_req->count_connectors > 0) {
688 u32 out_id;
689
690 /* Avoid unbounded kernel memory allocation */
691 if (crtc_req->count_connectors > config->num_connector) {
692 ret = -EINVAL;
693 goto out;
694 }
695
696 connector_set = kmalloc_array(crtc_req->count_connectors,
697 sizeof(struct drm_connector *),
698 GFP_KERNEL);
699 if (!connector_set) {
700 ret = -ENOMEM;
701 goto out;
702 }
703
704 for (i = 0; i < crtc_req->count_connectors; i++) {
705 connector_set[i] = NULL;
706 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
707 if (get_user(out_id, &set_connectors_ptr[i])) {
708 ret = -EFAULT;
709 goto out;
710 }
711
712 connector = drm_connector_lookup(dev, file_priv, out_id);
713 if (!connector) {
714 DRM_DEBUG_KMS("Connector id %d unknown\n",
715 out_id);
716 ret = -ENOENT;
717 goto out;
718 }
719 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
720 connector->base.id,
721 connector->name);
722
723 connector_set[i] = connector;
724 }
725 }
726
727 set.crtc = crtc;
728 set.x = crtc_req->x;
729 set.y = crtc_req->y;
730 set.mode = mode;
731 set.connectors = connector_set;
732 set.num_connectors = crtc_req->count_connectors;
733 set.fb = fb;
734
735 if (drm_drv_uses_atomic_modeset(dev))
736 ret = crtc->funcs->set_config(&set, &ctx);
737 else
738 ret = __drm_mode_set_config_internal(&set, &ctx);
739
740out:
741 if (fb)
742 drm_framebuffer_put(fb);
743
744 if (connector_set) {
745 for (i = 0; i < crtc_req->count_connectors; i++) {
746 if (connector_set[i])
747 drm_connector_put(connector_set[i]);
748 }
749 }
750 kfree(connector_set);
751 drm_mode_destroy(dev, mode);
752
753 /* In case we need to retry... */
754 connector_set = NULL;
755 fb = NULL;
756 mode = NULL;
757
758 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
759
760 return ret;
761}
762
763int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
764 struct drm_property *property,
765 uint64_t value)
766{
767 int ret = -EINVAL;
768 struct drm_crtc *crtc = obj_to_crtc(obj);
769
770 if (crtc->funcs->set_property)
771 ret = crtc->funcs->set_property(crtc, property, value);
772 if (!ret)
773 drm_object_property_set_value(obj, property, value);
774
775 return ret;
776}
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);