GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / gpu / drm / drm_crtc.c
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  */
84 struct 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 }
94 EXPORT_SYMBOL(drm_crtc_from_index);
95
96 int 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
107 static 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
119 int 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
136 void 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
147 static 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
159 static void drm_crtc_crc_fini(struct drm_crtc *crtc)
160 {
161 #ifdef CONFIG_DEBUG_FS
162         kfree(crtc->crc.source);
163 #endif
164 }
165
166 static const struct dma_fence_ops drm_crtc_fence_ops;
167
168 static 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
174 static 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
181 static 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
188 static 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
193 struct 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  */
253 int 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 }
333 EXPORT_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  */
343 void 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 }
371 EXPORT_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  */
386 int 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
445 static 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  */
502 int 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 }
508 EXPORT_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  */
519 int 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 }
537 EXPORT_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  */
552 int 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, i, num_connectors = 0;
566
567         if (!drm_core_check_feature(dev, DRIVER_MODESET))
568                 return -EOPNOTSUPP;
569
570         /*
571          * Universal plane src offsets are only 16.16, prevent havoc for
572          * drivers using universal plane code internally.
573          */
574         if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
575                 return -ERANGE;
576
577         crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
578         if (!crtc) {
579                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
580                 return -ENOENT;
581         }
582         DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
583
584         plane = crtc->primary;
585
586         /* allow disabling with the primary plane leased */
587         if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
588                 return -EACCES;
589
590         DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
591                                    DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
592
593         if (crtc_req->mode_valid) {
594                 /* If we have a mode we need a framebuffer. */
595                 /* If we pass -1, set the mode with the currently bound fb */
596                 if (crtc_req->fb_id == -1) {
597                         struct drm_framebuffer *old_fb;
598
599                         if (plane->state)
600                                 old_fb = plane->state->fb;
601                         else
602                                 old_fb = plane->fb;
603
604                         if (!old_fb) {
605                                 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
606                                 ret = -EINVAL;
607                                 goto out;
608                         }
609
610                         fb = old_fb;
611                         /* Make refcounting symmetric with the lookup path. */
612                         drm_framebuffer_get(fb);
613                 } else {
614                         fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
615                         if (!fb) {
616                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
617                                                 crtc_req->fb_id);
618                                 ret = -ENOENT;
619                                 goto out;
620                         }
621                 }
622
623                 mode = drm_mode_create(dev);
624                 if (!mode) {
625                         ret = -ENOMEM;
626                         goto out;
627                 }
628                 if (!file_priv->aspect_ratio_allowed &&
629                     (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
630                         DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
631                         ret = -EINVAL;
632                         goto out;
633                 }
634
635
636                 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
637                 if (ret) {
638                         DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
639                                       ret, drm_get_mode_status_name(mode->status));
640                         drm_mode_debug_printmodeline(mode);
641                         goto out;
642                 }
643
644                 /*
645                  * Check whether the primary plane supports the fb pixel format.
646                  * Drivers not implementing the universal planes API use a
647                  * default formats list provided by the DRM core which doesn't
648                  * match real hardware capabilities. Skip the check in that
649                  * case.
650                  */
651                 if (!plane->format_default) {
652                         ret = drm_plane_check_pixel_format(plane,
653                                                            fb->format->format,
654                                                            fb->modifier);
655                         if (ret) {
656                                 struct drm_format_name_buf format_name;
657
658                                 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
659                                               drm_get_format_name(fb->format->format,
660                                                                   &format_name),
661                                               fb->modifier);
662                                 goto out;
663                         }
664                 }
665
666                 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
667                                               mode, fb);
668                 if (ret)
669                         goto out;
670
671         }
672
673         if (crtc_req->count_connectors == 0 && mode) {
674                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
675                 ret = -EINVAL;
676                 goto out;
677         }
678
679         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
680                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
681                           crtc_req->count_connectors);
682                 ret = -EINVAL;
683                 goto out;
684         }
685
686         if (crtc_req->count_connectors > 0) {
687                 u32 out_id;
688
689                 /* Avoid unbounded kernel memory allocation */
690                 if (crtc_req->count_connectors > config->num_connector) {
691                         ret = -EINVAL;
692                         goto out;
693                 }
694
695                 connector_set = kmalloc_array(crtc_req->count_connectors,
696                                               sizeof(struct drm_connector *),
697                                               GFP_KERNEL);
698                 if (!connector_set) {
699                         ret = -ENOMEM;
700                         goto out;
701                 }
702
703                 for (i = 0; i < crtc_req->count_connectors; i++) {
704                         connector_set[i] = NULL;
705                         set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
706                         if (get_user(out_id, &set_connectors_ptr[i])) {
707                                 ret = -EFAULT;
708                                 goto out;
709                         }
710
711                         connector = drm_connector_lookup(dev, file_priv, out_id);
712                         if (!connector) {
713                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
714                                                 out_id);
715                                 ret = -ENOENT;
716                                 goto out;
717                         }
718                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
719                                         connector->base.id,
720                                         connector->name);
721
722                         connector_set[i] = connector;
723                         num_connectors++;
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 = num_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
740 out:
741         if (fb)
742                 drm_framebuffer_put(fb);
743
744         if (connector_set) {
745                 for (i = 0; i < num_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
763 int 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 }