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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 <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_managed.h>
42#include <drm/drm_modeset_lock.h>
43#include <drm/drm_atomic.h>
44#include <drm/drm_auth.h>
45#include <drm/drm_debugfs_crc.h>
46#include <drm/drm_drv.h>
47#include <drm/drm_print.h>
48#include <drm/drm_file.h>
49
50#include "drm_crtc_internal.h"
51#include "drm_internal.h"
52
53/**
54 * DOC: overview
55 *
56 * A CRTC represents the overall display pipeline. It receives pixel data from
57 * &drm_plane and blends them together. The &drm_display_mode is also attached
58 * to the CRTC, specifying display timings. On the output side the data is fed
59 * to one or more &drm_encoder, which are then each connected to one
60 * &drm_connector.
61 *
62 * To create a CRTC, a KMS drivers allocates and zeroes an instances of
63 * &struct drm_crtc (possibly as part of a larger structure) and registers it
64 * with a call to drm_crtc_init_with_planes().
65 *
66 * The CRTC is also the entry point for legacy modeset operations, see
67 * &drm_crtc_funcs.set_config, legacy plane operations, see
68 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy
69 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these
70 * features are controlled through &drm_property and
71 * &drm_mode_config_funcs.atomic_check.
72 */
73
74/**
75 * drm_crtc_from_index - find the registered CRTC at an index
76 * @dev: DRM device
77 * @idx: index of registered CRTC to find for
78 *
79 * Given a CRTC index, return the registered CRTC from DRM device's
80 * list of CRTCs with matching index. This is the inverse of drm_crtc_index().
81 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or
82 * &drm_driver.disable_vblank), since that still deals with indices instead
83 * of pointers to &struct drm_crtc."
84 */
85struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx)
86{
87 struct drm_crtc *crtc;
88
89 drm_for_each_crtc(crtc, dev)
90 if (idx == crtc->index)
91 return crtc;
92
93 return NULL;
94}
95EXPORT_SYMBOL(drm_crtc_from_index);
96
97int drm_crtc_force_disable(struct drm_crtc *crtc)
98{
99 struct drm_mode_set set = {
100 .crtc = crtc,
101 };
102
103 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
104
105 return drm_mode_set_config_internal(&set);
106}
107
108static unsigned int drm_num_crtcs(struct drm_device *dev)
109{
110 unsigned int num = 0;
111 struct drm_crtc *tmp;
112
113 drm_for_each_crtc(tmp, dev) {
114 num++;
115 }
116
117 return num;
118}
119
120int drm_crtc_register_all(struct drm_device *dev)
121{
122 struct drm_crtc *crtc;
123 int ret = 0;
124
125 drm_for_each_crtc(crtc, dev) {
126 drm_debugfs_crtc_add(crtc);
127
128 if (crtc->funcs->late_register)
129 ret = crtc->funcs->late_register(crtc);
130 if (ret)
131 return ret;
132 }
133
134 return 0;
135}
136
137void drm_crtc_unregister_all(struct drm_device *dev)
138{
139 struct drm_crtc *crtc;
140
141 drm_for_each_crtc(crtc, dev) {
142 if (crtc->funcs->early_unregister)
143 crtc->funcs->early_unregister(crtc);
144 drm_debugfs_crtc_remove(crtc);
145 }
146}
147
148static int drm_crtc_crc_init(struct drm_crtc *crtc)
149{
150#ifdef CONFIG_DEBUG_FS
151 spin_lock_init(&crtc->crc.lock);
152 init_waitqueue_head(&crtc->crc.wq);
153 crtc->crc.source = kstrdup("auto", GFP_KERNEL);
154 if (!crtc->crc.source)
155 return -ENOMEM;
156#endif
157 return 0;
158}
159
160static void drm_crtc_crc_fini(struct drm_crtc *crtc)
161{
162#ifdef CONFIG_DEBUG_FS
163 kfree(crtc->crc.source);
164#endif
165}
166
167static const struct dma_fence_ops drm_crtc_fence_ops;
168
169static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
170{
171 BUG_ON(fence->ops != &drm_crtc_fence_ops);
172 return container_of(fence->lock, struct drm_crtc, fence_lock);
173}
174
175static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
176{
177 struct drm_crtc *crtc = fence_to_crtc(fence);
178
179 return crtc->dev->driver->name;
180}
181
182static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
183{
184 struct drm_crtc *crtc = fence_to_crtc(fence);
185
186 return crtc->timeline_name;
187}
188
189static const struct dma_fence_ops drm_crtc_fence_ops = {
190 .get_driver_name = drm_crtc_fence_get_driver_name,
191 .get_timeline_name = drm_crtc_fence_get_timeline_name,
192};
193
194struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
195{
196 struct dma_fence *fence;
197
198 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
199 if (!fence)
200 return NULL;
201
202 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
203 crtc->fence_context, ++crtc->fence_seqno);
204
205 return fence;
206}
207
208/**
209 * DOC: standard CRTC properties
210 *
211 * DRM CRTCs have a few standardized properties:
212 *
213 * ACTIVE:
214 * Atomic property for setting the power state of the CRTC. When set to 1
215 * the CRTC will actively display content. When set to 0 the CRTC will be
216 * powered off. There is no expectation that user-space will reset CRTC
217 * resources like the mode and planes when setting ACTIVE to 0.
218 *
219 * User-space can rely on an ACTIVE change to 1 to never fail an atomic
220 * test as long as no other property has changed. If a change to ACTIVE
221 * fails an atomic test, this is a driver bug. For this reason setting
222 * ACTIVE to 0 must not release internal resources (like reserved memory
223 * bandwidth or clock generators).
224 *
225 * Note that the legacy DPMS property on connectors is internally routed
226 * to control this property for atomic drivers.
227 * MODE_ID:
228 * Atomic property for setting the CRTC display timings. The value is the
229 * ID of a blob containing the DRM mode info. To disable the CRTC,
230 * user-space must set this property to 0.
231 *
232 * Setting MODE_ID to 0 will release reserved resources for the CRTC.
233 * SCALING_FILTER:
234 * Atomic property for setting the scaling filter for CRTC scaler
235 *
236 * The value of this property can be one of the following:
237 *
238 * Default:
239 * Driver's default scaling filter
240 * Nearest Neighbor:
241 * Nearest Neighbor scaling filter
242 */
243
244__printf(6, 0)
245static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
246 struct drm_plane *primary,
247 struct drm_plane *cursor,
248 const struct drm_crtc_funcs *funcs,
249 const char *name, va_list ap)
250{
251 struct drm_mode_config *config = &dev->mode_config;
252 int ret;
253
254 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
255 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
256
257 /* crtc index is used with 32bit bitmasks */
258 if (WARN_ON(config->num_crtc >= 32))
259 return -EINVAL;
260
261 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
262 (!funcs->atomic_destroy_state ||
263 !funcs->atomic_duplicate_state));
264
265 crtc->dev = dev;
266 crtc->funcs = funcs;
267
268 INIT_LIST_HEAD(&crtc->commit_list);
269 spin_lock_init(&crtc->commit_lock);
270
271 drm_modeset_lock_init(&crtc->mutex);
272 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
273 if (ret)
274 return ret;
275
276 if (name) {
277 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
278 } else {
279 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
280 drm_num_crtcs(dev));
281 }
282 if (!crtc->name) {
283 drm_mode_object_unregister(dev, &crtc->base);
284 return -ENOMEM;
285 }
286
287 crtc->fence_context = dma_fence_context_alloc(1);
288 spin_lock_init(&crtc->fence_lock);
289 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
290 "CRTC:%d-%s", crtc->base.id, crtc->name);
291
292 crtc->base.properties = &crtc->properties;
293
294 list_add_tail(&crtc->head, &config->crtc_list);
295 crtc->index = config->num_crtc++;
296
297 crtc->primary = primary;
298 crtc->cursor = cursor;
299 if (primary && !primary->possible_crtcs)
300 primary->possible_crtcs = drm_crtc_mask(crtc);
301 if (cursor && !cursor->possible_crtcs)
302 cursor->possible_crtcs = drm_crtc_mask(crtc);
303
304 ret = drm_crtc_crc_init(crtc);
305 if (ret) {
306 drm_mode_object_unregister(dev, &crtc->base);
307 return ret;
308 }
309
310 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
311 drm_object_attach_property(&crtc->base, config->prop_active, 0);
312 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
313 drm_object_attach_property(&crtc->base,
314 config->prop_out_fence_ptr, 0);
315 drm_object_attach_property(&crtc->base,
316 config->prop_vrr_enabled, 0);
317 }
318
319 return 0;
320}
321
322/**
323 * drm_crtc_init_with_planes - Initialise a new CRTC object with
324 * specified primary and cursor planes.
325 * @dev: DRM device
326 * @crtc: CRTC object to init
327 * @primary: Primary plane for CRTC
328 * @cursor: Cursor plane for CRTC
329 * @funcs: callbacks for the new CRTC
330 * @name: printf style format string for the CRTC name, or NULL for default name
331 *
332 * Inits a new object created as base part of a driver crtc object. Drivers
333 * should use this function instead of drm_crtc_init(), which is only provided
334 * for backwards compatibility with drivers which do not yet support universal
335 * planes). For really simple hardware which has only 1 plane look at
336 * drm_simple_display_pipe_init() instead.
337 * The &drm_crtc_funcs.destroy hook should call drm_crtc_cleanup() and kfree()
338 * the crtc structure. The crtc structure should not be allocated with
339 * devm_kzalloc().
340 *
341 * The @primary and @cursor planes are only relevant for legacy uAPI, see
342 * &drm_crtc.primary and &drm_crtc.cursor.
343 *
344 * Note: consider using drmm_crtc_alloc_with_planes() instead of
345 * drm_crtc_init_with_planes() to let the DRM managed resource infrastructure
346 * take care of cleanup and deallocation.
347 *
348 * Returns:
349 * Zero on success, error code on failure.
350 */
351int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
352 struct drm_plane *primary,
353 struct drm_plane *cursor,
354 const struct drm_crtc_funcs *funcs,
355 const char *name, ...)
356{
357 va_list ap;
358 int ret;
359
360 WARN_ON(!funcs->destroy);
361
362 va_start(ap, name);
363 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
364 name, ap);
365 va_end(ap);
366
367 return ret;
368}
369EXPORT_SYMBOL(drm_crtc_init_with_planes);
370
371static void drmm_crtc_alloc_with_planes_cleanup(struct drm_device *dev,
372 void *ptr)
373{
374 struct drm_crtc *crtc = ptr;
375
376 drm_crtc_cleanup(crtc);
377}
378
379void *__drmm_crtc_alloc_with_planes(struct drm_device *dev,
380 size_t size, size_t offset,
381 struct drm_plane *primary,
382 struct drm_plane *cursor,
383 const struct drm_crtc_funcs *funcs,
384 const char *name, ...)
385{
386 void *container;
387 struct drm_crtc *crtc;
388 va_list ap;
389 int ret;
390
391 if (WARN_ON(!funcs || funcs->destroy))
392 return ERR_PTR(-EINVAL);
393
394 container = drmm_kzalloc(dev, size, GFP_KERNEL);
395 if (!container)
396 return ERR_PTR(-ENOMEM);
397
398 crtc = container + offset;
399
400 va_start(ap, name);
401 ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
402 name, ap);
403 va_end(ap);
404 if (ret)
405 return ERR_PTR(ret);
406
407 ret = drmm_add_action_or_reset(dev, drmm_crtc_alloc_with_planes_cleanup,
408 crtc);
409 if (ret)
410 return ERR_PTR(ret);
411
412 return container;
413}
414EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes);
415
416/**
417 * drm_crtc_cleanup - Clean up the core crtc usage
418 * @crtc: CRTC to cleanup
419 *
420 * This function cleans up @crtc and removes it from the DRM mode setting
421 * core. Note that the function does *not* free the crtc structure itself,
422 * this is the responsibility of the caller.
423 */
424void drm_crtc_cleanup(struct drm_crtc *crtc)
425{
426 struct drm_device *dev = crtc->dev;
427
428 /* Note that the crtc_list is considered to be static; should we
429 * remove the drm_crtc at runtime we would have to decrement all
430 * the indices on the drm_crtc after us in the crtc_list.
431 */
432
433 drm_crtc_crc_fini(crtc);
434
435 kfree(crtc->gamma_store);
436 crtc->gamma_store = NULL;
437
438 drm_modeset_lock_fini(&crtc->mutex);
439
440 drm_mode_object_unregister(dev, &crtc->base);
441 list_del(&crtc->head);
442 dev->mode_config.num_crtc--;
443
444 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
445 if (crtc->state && crtc->funcs->atomic_destroy_state)
446 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
447
448 kfree(crtc->name);
449
450 memset(crtc, 0, sizeof(*crtc));
451}
452EXPORT_SYMBOL(drm_crtc_cleanup);
453
454/**
455 * drm_mode_getcrtc - get CRTC configuration
456 * @dev: drm device for the ioctl
457 * @data: data pointer for the ioctl
458 * @file_priv: drm file for the ioctl call
459 *
460 * Construct a CRTC configuration structure to return to the user.
461 *
462 * Called by the user via ioctl.
463 *
464 * Returns:
465 * Zero on success, negative errno on failure.
466 */
467int drm_mode_getcrtc(struct drm_device *dev,
468 void *data, struct drm_file *file_priv)
469{
470 struct drm_mode_crtc *crtc_resp = data;
471 struct drm_crtc *crtc;
472 struct drm_plane *plane;
473
474 if (!drm_core_check_feature(dev, DRIVER_MODESET))
475 return -EOPNOTSUPP;
476
477 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
478 if (!crtc)
479 return -ENOENT;
480
481 plane = crtc->primary;
482
483 crtc_resp->gamma_size = crtc->gamma_size;
484
485 drm_modeset_lock(&plane->mutex, NULL);
486 if (plane->state && plane->state->fb)
487 crtc_resp->fb_id = plane->state->fb->base.id;
488 else if (!plane->state && plane->fb)
489 crtc_resp->fb_id = plane->fb->base.id;
490 else
491 crtc_resp->fb_id = 0;
492
493 if (plane->state) {
494 crtc_resp->x = plane->state->src_x >> 16;
495 crtc_resp->y = plane->state->src_y >> 16;
496 }
497 drm_modeset_unlock(&plane->mutex);
498
499 drm_modeset_lock(&crtc->mutex, NULL);
500 if (crtc->state) {
501 if (crtc->state->enable) {
502 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
503 crtc_resp->mode_valid = 1;
504 } else {
505 crtc_resp->mode_valid = 0;
506 }
507 } else {
508 crtc_resp->x = crtc->x;
509 crtc_resp->y = crtc->y;
510
511 if (crtc->enabled) {
512 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
513 crtc_resp->mode_valid = 1;
514
515 } else {
516 crtc_resp->mode_valid = 0;
517 }
518 }
519 if (!file_priv->aspect_ratio_allowed)
520 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
521 drm_modeset_unlock(&crtc->mutex);
522
523 return 0;
524}
525
526static int __drm_mode_set_config_internal(struct drm_mode_set *set,
527 struct drm_modeset_acquire_ctx *ctx)
528{
529 struct drm_crtc *crtc = set->crtc;
530 struct drm_framebuffer *fb;
531 struct drm_crtc *tmp;
532 int ret;
533
534 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
535
536 /*
537 * NOTE: ->set_config can also disable other crtcs (if we steal all
538 * connectors from it), hence we need to refcount the fbs across all
539 * crtcs. Atomic modeset will have saner semantics ...
540 */
541 drm_for_each_crtc(tmp, crtc->dev) {
542 struct drm_plane *plane = tmp->primary;
543
544 plane->old_fb = plane->fb;
545 }
546
547 fb = set->fb;
548
549 ret = crtc->funcs->set_config(set, ctx);
550 if (ret == 0) {
551 struct drm_plane *plane = crtc->primary;
552
553 plane->crtc = fb ? crtc : NULL;
554 plane->fb = fb;
555 }
556
557 drm_for_each_crtc(tmp, crtc->dev) {
558 struct drm_plane *plane = tmp->primary;
559
560 if (plane->fb)
561 drm_framebuffer_get(plane->fb);
562 if (plane->old_fb)
563 drm_framebuffer_put(plane->old_fb);
564 plane->old_fb = NULL;
565 }
566
567 return ret;
568}
569
570/**
571 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
572 * @set: modeset config to set
573 *
574 * This is a little helper to wrap internal calls to the
575 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
576 * correct refcounting dance.
577 *
578 * This should only be used by non-atomic legacy drivers.
579 *
580 * Returns:
581 * Zero on success, negative errno on failure.
582 */
583int drm_mode_set_config_internal(struct drm_mode_set *set)
584{
585 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
586
587 return __drm_mode_set_config_internal(set, NULL);
588}
589EXPORT_SYMBOL(drm_mode_set_config_internal);
590
591/**
592 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
593 * CRTC viewport
594 * @crtc: CRTC that framebuffer will be displayed on
595 * @x: x panning
596 * @y: y panning
597 * @mode: mode that framebuffer will be displayed under
598 * @fb: framebuffer to check size of
599 */
600int drm_crtc_check_viewport(const struct drm_crtc *crtc,
601 int x, int y,
602 const struct drm_display_mode *mode,
603 const struct drm_framebuffer *fb)
604
605{
606 int hdisplay, vdisplay;
607
608 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
609
610 if (crtc->state &&
611 drm_rotation_90_or_270(crtc->primary->state->rotation))
612 swap(hdisplay, vdisplay);
613
614 return drm_framebuffer_check_src_coords(x << 16, y << 16,
615 hdisplay << 16, vdisplay << 16,
616 fb);
617}
618EXPORT_SYMBOL(drm_crtc_check_viewport);
619
620/**
621 * drm_mode_setcrtc - set CRTC configuration
622 * @dev: drm device for the ioctl
623 * @data: data pointer for the ioctl
624 * @file_priv: drm file for the ioctl call
625 *
626 * Build a new CRTC configuration based on user request.
627 *
628 * Called by the user via ioctl.
629 *
630 * Returns:
631 * Zero on success, negative errno on failure.
632 */
633int drm_mode_setcrtc(struct drm_device *dev, void *data,
634 struct drm_file *file_priv)
635{
636 struct drm_mode_config *config = &dev->mode_config;
637 struct drm_mode_crtc *crtc_req = data;
638 struct drm_crtc *crtc;
639 struct drm_plane *plane;
640 struct drm_connector **connector_set = NULL, *connector;
641 struct drm_framebuffer *fb = NULL;
642 struct drm_display_mode *mode = NULL;
643 struct drm_mode_set set;
644 uint32_t __user *set_connectors_ptr;
645 struct drm_modeset_acquire_ctx ctx;
646 int ret;
647 int i;
648
649 if (!drm_core_check_feature(dev, DRIVER_MODESET))
650 return -EOPNOTSUPP;
651
652 /*
653 * Universal plane src offsets are only 16.16, prevent havoc for
654 * drivers using universal plane code internally.
655 */
656 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
657 return -ERANGE;
658
659 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
660 if (!crtc) {
661 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
662 return -ENOENT;
663 }
664 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
665
666 plane = crtc->primary;
667
668 /* allow disabling with the primary plane leased */
669 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
670 return -EACCES;
671
672 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
673 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
674
675 if (crtc_req->mode_valid) {
676 /* If we have a mode we need a framebuffer. */
677 /* If we pass -1, set the mode with the currently bound fb */
678 if (crtc_req->fb_id == -1) {
679 struct drm_framebuffer *old_fb;
680
681 if (plane->state)
682 old_fb = plane->state->fb;
683 else
684 old_fb = plane->fb;
685
686 if (!old_fb) {
687 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
688 ret = -EINVAL;
689 goto out;
690 }
691
692 fb = old_fb;
693 /* Make refcounting symmetric with the lookup path. */
694 drm_framebuffer_get(fb);
695 } else {
696 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
697 if (!fb) {
698 DRM_DEBUG_KMS("Unknown FB ID%d\n",
699 crtc_req->fb_id);
700 ret = -ENOENT;
701 goto out;
702 }
703 }
704
705 mode = drm_mode_create(dev);
706 if (!mode) {
707 ret = -ENOMEM;
708 goto out;
709 }
710 if (!file_priv->aspect_ratio_allowed &&
711 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
712 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
713 ret = -EINVAL;
714 goto out;
715 }
716
717
718 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
719 if (ret) {
720 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
721 ret, drm_get_mode_status_name(mode->status));
722 drm_mode_debug_printmodeline(mode);
723 goto out;
724 }
725
726 /*
727 * Check whether the primary plane supports the fb pixel format.
728 * Drivers not implementing the universal planes API use a
729 * default formats list provided by the DRM core which doesn't
730 * match real hardware capabilities. Skip the check in that
731 * case.
732 */
733 if (!plane->format_default) {
734 ret = drm_plane_check_pixel_format(plane,
735 fb->format->format,
736 fb->modifier);
737 if (ret) {
738 DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
739 &fb->format->format,
740 fb->modifier);
741 goto out;
742 }
743 }
744
745 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
746 mode, fb);
747 if (ret)
748 goto out;
749
750 }
751
752 if (crtc_req->count_connectors == 0 && mode) {
753 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
754 ret = -EINVAL;
755 goto out;
756 }
757
758 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
759 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
760 crtc_req->count_connectors);
761 ret = -EINVAL;
762 goto out;
763 }
764
765 if (crtc_req->count_connectors > 0) {
766 u32 out_id;
767
768 /* Avoid unbounded kernel memory allocation */
769 if (crtc_req->count_connectors > config->num_connector) {
770 ret = -EINVAL;
771 goto out;
772 }
773
774 connector_set = kmalloc_array(crtc_req->count_connectors,
775 sizeof(struct drm_connector *),
776 GFP_KERNEL);
777 if (!connector_set) {
778 ret = -ENOMEM;
779 goto out;
780 }
781
782 for (i = 0; i < crtc_req->count_connectors; i++) {
783 connector_set[i] = NULL;
784 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
785 if (get_user(out_id, &set_connectors_ptr[i])) {
786 ret = -EFAULT;
787 goto out;
788 }
789
790 connector = drm_connector_lookup(dev, file_priv, out_id);
791 if (!connector) {
792 DRM_DEBUG_KMS("Connector id %d unknown\n",
793 out_id);
794 ret = -ENOENT;
795 goto out;
796 }
797 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
798 connector->base.id,
799 connector->name);
800
801 connector_set[i] = connector;
802 }
803 }
804
805 set.crtc = crtc;
806 set.x = crtc_req->x;
807 set.y = crtc_req->y;
808 set.mode = mode;
809 set.connectors = connector_set;
810 set.num_connectors = crtc_req->count_connectors;
811 set.fb = fb;
812
813 if (drm_drv_uses_atomic_modeset(dev))
814 ret = crtc->funcs->set_config(&set, &ctx);
815 else
816 ret = __drm_mode_set_config_internal(&set, &ctx);
817
818out:
819 if (fb)
820 drm_framebuffer_put(fb);
821
822 if (connector_set) {
823 for (i = 0; i < crtc_req->count_connectors; i++) {
824 if (connector_set[i])
825 drm_connector_put(connector_set[i]);
826 }
827 }
828 kfree(connector_set);
829 drm_mode_destroy(dev, mode);
830
831 /* In case we need to retry... */
832 connector_set = NULL;
833 fb = NULL;
834 mode = NULL;
835
836 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
837
838 return ret;
839}
840
841int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
842 struct drm_property *property,
843 uint64_t value)
844{
845 int ret = -EINVAL;
846 struct drm_crtc *crtc = obj_to_crtc(obj);
847
848 if (crtc->funcs->set_property)
849 ret = crtc->funcs->set_property(crtc, property, value);
850 if (!ret)
851 drm_object_property_set_value(obj, property, value);
852
853 return ret;
854}
855
856/**
857 * drm_crtc_create_scaling_filter_property - create a new scaling filter
858 * property
859 *
860 * @crtc: drm CRTC
861 * @supported_filters: bitmask of supported scaling filters, must include
862 * BIT(DRM_SCALING_FILTER_DEFAULT).
863 *
864 * This function lets driver to enable the scaling filter property on a given
865 * CRTC.
866 *
867 * RETURNS:
868 * Zero for success or -errno
869 */
870int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
871 unsigned int supported_filters)
872{
873 struct drm_property *prop =
874 drm_create_scaling_filter_prop(crtc->dev, supported_filters);
875
876 if (IS_ERR(prop))
877 return PTR_ERR(prop);
878
879 drm_object_attach_property(&crtc->base, prop,
880 DRM_SCALING_FILTER_DEFAULT);
881 crtc->scaling_filter_property = prop;
882
883 return 0;
884}
885EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property);