1 /*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
29 #include <drm/drmP.h>
30 #include <drm/drm_atomic.h>
31 #include <drm/drm_mode.h>
32 #include <drm/drm_print.h>
33 #include <drm/drm_writeback.h>
34 #include <linux/sync_file.h>
36 #include "drm_crtc_internal.h"
37 #include "drm_internal.h"
39 void __drm_crtc_commit_free(struct kref *kref)
40 {
41 struct drm_crtc_commit *commit =
42 container_of(kref, struct drm_crtc_commit, ref);
44 kfree(commit);
45 }
46 EXPORT_SYMBOL(__drm_crtc_commit_free);
48 /**
49 * drm_atomic_state_default_release -
50 * release memory initialized by drm_atomic_state_init
51 * @state: atomic state
52 *
53 * Free all the memory allocated by drm_atomic_state_init.
54 * This should only be used by drivers which are still subclassing
55 * &drm_atomic_state and haven't switched to &drm_private_state yet.
56 */
57 void drm_atomic_state_default_release(struct drm_atomic_state *state)
58 {
59 kfree(state->connectors);
60 kfree(state->crtcs);
61 kfree(state->planes);
62 kfree(state->private_objs);
63 }
64 EXPORT_SYMBOL(drm_atomic_state_default_release);
66 /**
67 * drm_atomic_state_init - init new atomic state
68 * @dev: DRM device
69 * @state: atomic state
70 *
71 * Default implementation for filling in a new atomic state.
72 * This should only be used by drivers which are still subclassing
73 * &drm_atomic_state and haven't switched to &drm_private_state yet.
74 */
75 int
76 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
77 {
78 kref_init(&state->ref);
80 /* TODO legacy paths should maybe do a better job about
81 * setting this appropriately?
82 */
83 state->allow_modeset = true;
85 state->crtcs = kcalloc(dev->mode_config.num_crtc,
86 sizeof(*state->crtcs), GFP_KERNEL);
87 if (!state->crtcs)
88 goto fail;
89 state->planes = kcalloc(dev->mode_config.num_total_plane,
90 sizeof(*state->planes), GFP_KERNEL);
91 if (!state->planes)
92 goto fail;
94 state->dev = dev;
96 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
98 return 0;
99 fail:
100 drm_atomic_state_default_release(state);
101 return -ENOMEM;
102 }
103 EXPORT_SYMBOL(drm_atomic_state_init);
105 /**
106 * drm_atomic_state_alloc - allocate atomic state
107 * @dev: DRM device
108 *
109 * This allocates an empty atomic state to track updates.
110 */
111 struct drm_atomic_state *
112 drm_atomic_state_alloc(struct drm_device *dev)
113 {
114 struct drm_mode_config *config = &dev->mode_config;
116 if (!config->funcs->atomic_state_alloc) {
117 struct drm_atomic_state *state;
119 state = kzalloc(sizeof(*state), GFP_KERNEL);
120 if (!state)
121 return NULL;
122 if (drm_atomic_state_init(dev, state) < 0) {
123 kfree(state);
124 return NULL;
125 }
126 return state;
127 }
129 return config->funcs->atomic_state_alloc(dev);
130 }
131 EXPORT_SYMBOL(drm_atomic_state_alloc);
133 /**
134 * drm_atomic_state_default_clear - clear base atomic state
135 * @state: atomic state
136 *
137 * Default implementation for clearing atomic state.
138 * This should only be used by drivers which are still subclassing
139 * &drm_atomic_state and haven't switched to &drm_private_state yet.
140 */
141 void drm_atomic_state_default_clear(struct drm_atomic_state *state)
142 {
143 struct drm_device *dev = state->dev;
144 struct drm_mode_config *config = &dev->mode_config;
145 int i;
147 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
149 for (i = 0; i < state->num_connector; i++) {
150 struct drm_connector *connector = state->connectors[i].ptr;
152 if (!connector)
153 continue;
155 connector->funcs->atomic_destroy_state(connector,
156 state->connectors[i].state);
157 state->connectors[i].ptr = NULL;
158 state->connectors[i].state = NULL;
159 state->connectors[i].old_state = NULL;
160 state->connectors[i].new_state = NULL;
161 drm_connector_put(connector);
162 }
164 for (i = 0; i < config->num_crtc; i++) {
165 struct drm_crtc *crtc = state->crtcs[i].ptr;
167 if (!crtc)
168 continue;
170 crtc->funcs->atomic_destroy_state(crtc,
171 state->crtcs[i].state);
173 state->crtcs[i].ptr = NULL;
174 state->crtcs[i].state = NULL;
175 state->crtcs[i].old_state = NULL;
176 state->crtcs[i].new_state = NULL;
177 }
179 for (i = 0; i < config->num_total_plane; i++) {
180 struct drm_plane *plane = state->planes[i].ptr;
182 if (!plane)
183 continue;
185 plane->funcs->atomic_destroy_state(plane,
186 state->planes[i].state);
187 state->planes[i].ptr = NULL;
188 state->planes[i].state = NULL;
189 state->planes[i].old_state = NULL;
190 state->planes[i].new_state = NULL;
191 }
193 for (i = 0; i < state->num_private_objs; i++) {
194 struct drm_private_obj *obj = state->private_objs[i].ptr;
196 obj->funcs->atomic_destroy_state(obj,
197 state->private_objs[i].state);
198 state->private_objs[i].ptr = NULL;
199 state->private_objs[i].state = NULL;
200 state->private_objs[i].old_state = NULL;
201 state->private_objs[i].new_state = NULL;
202 }
203 state->num_private_objs = 0;
205 if (state->fake_commit) {
206 drm_crtc_commit_put(state->fake_commit);
207 state->fake_commit = NULL;
208 }
209 }
210 EXPORT_SYMBOL(drm_atomic_state_default_clear);
212 /**
213 * drm_atomic_state_clear - clear state object
214 * @state: atomic state
215 *
216 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
217 * all locks. So someone else could sneak in and change the current modeset
218 * configuration. Which means that all the state assembled in @state is no
219 * longer an atomic update to the current state, but to some arbitrary earlier
220 * state. Which could break assumptions the driver's
221 * &drm_mode_config_funcs.atomic_check likely relies on.
222 *
223 * Hence we must clear all cached state and completely start over, using this
224 * function.
225 */
226 void drm_atomic_state_clear(struct drm_atomic_state *state)
227 {
228 struct drm_device *dev = state->dev;
229 struct drm_mode_config *config = &dev->mode_config;
231 if (config->funcs->atomic_state_clear)
232 config->funcs->atomic_state_clear(state);
233 else
234 drm_atomic_state_default_clear(state);
235 }
236 EXPORT_SYMBOL(drm_atomic_state_clear);
238 /**
239 * __drm_atomic_state_free - free all memory for an atomic state
240 * @ref: This atomic state to deallocate
241 *
242 * This frees all memory associated with an atomic state, including all the
243 * per-object state for planes, crtcs and connectors.
244 */
245 void __drm_atomic_state_free(struct kref *ref)
246 {
247 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
248 struct drm_mode_config *config = &state->dev->mode_config;
250 drm_atomic_state_clear(state);
252 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
254 if (config->funcs->atomic_state_free) {
255 config->funcs->atomic_state_free(state);
256 } else {
257 drm_atomic_state_default_release(state);
258 kfree(state);
259 }
260 }
261 EXPORT_SYMBOL(__drm_atomic_state_free);
263 /**
264 * drm_atomic_get_crtc_state - get crtc state
265 * @state: global atomic state object
266 * @crtc: crtc to get state object for
267 *
268 * This function returns the crtc state for the given crtc, allocating it if
269 * needed. It will also grab the relevant crtc lock to make sure that the state
270 * is consistent.
271 *
272 * Returns:
273 *
274 * Either the allocated state or the error code encoded into the pointer. When
275 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
276 * entire atomic sequence must be restarted. All other errors are fatal.
277 */
278 struct drm_crtc_state *
279 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
280 struct drm_crtc *crtc)
281 {
282 int ret, index = drm_crtc_index(crtc);
283 struct drm_crtc_state *crtc_state;
285 WARN_ON(!state->acquire_ctx);
287 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
288 if (crtc_state)
289 return crtc_state;
291 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
292 if (ret)
293 return ERR_PTR(ret);
295 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
296 if (!crtc_state)
297 return ERR_PTR(-ENOMEM);
299 state->crtcs[index].state = crtc_state;
300 state->crtcs[index].old_state = crtc->state;
301 state->crtcs[index].new_state = crtc_state;
302 state->crtcs[index].ptr = crtc;
303 crtc_state->state = state;
305 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
306 crtc->base.id, crtc->name, crtc_state, state);
308 return crtc_state;
309 }
310 EXPORT_SYMBOL(drm_atomic_get_crtc_state);
312 static void set_out_fence_for_crtc(struct drm_atomic_state *state,
313 struct drm_crtc *crtc, s32 __user *fence_ptr)
314 {
315 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
316 }
318 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
319 struct drm_crtc *crtc)
320 {
321 s32 __user *fence_ptr;
323 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
324 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
326 return fence_ptr;
327 }
329 static int set_out_fence_for_connector(struct drm_atomic_state *state,
330 struct drm_connector *connector,
331 s32 __user *fence_ptr)
332 {
333 unsigned int index = drm_connector_index(connector);
335 if (!fence_ptr)
336 return 0;
338 if (put_user(-1, fence_ptr))
339 return -EFAULT;
341 state->connectors[index].out_fence_ptr = fence_ptr;
343 return 0;
344 }
346 static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state,
347 struct drm_connector *connector)
348 {
349 unsigned int index = drm_connector_index(connector);
350 s32 __user *fence_ptr;
352 fence_ptr = state->connectors[index].out_fence_ptr;
353 state->connectors[index].out_fence_ptr = NULL;
355 return fence_ptr;
356 }
358 /**
359 * drm_atomic_set_mode_for_crtc - set mode for CRTC
360 * @state: the CRTC whose incoming state to update
361 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
362 *
363 * Set a mode (originating from the kernel) on the desired CRTC state and update
364 * the enable property.
365 *
366 * RETURNS:
367 * Zero on success, error code on failure. Cannot return -EDEADLK.
368 */
369 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
370 const struct drm_display_mode *mode)
371 {
372 struct drm_crtc *crtc = state->crtc;
373 struct drm_mode_modeinfo umode;
375 /* Early return for no change. */
376 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
377 return 0;
379 drm_property_blob_put(state->mode_blob);
380 state->mode_blob = NULL;
382 if (mode) {
383 drm_mode_convert_to_umode(&umode, mode);
384 state->mode_blob =
385 drm_property_create_blob(state->crtc->dev,
386 sizeof(umode),
387 &umode);
388 if (IS_ERR(state->mode_blob))
389 return PTR_ERR(state->mode_blob);
391 drm_mode_copy(&state->mode, mode);
392 state->enable = true;
393 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
394 mode->name, crtc->base.id, crtc->name, state);
395 } else {
396 memset(&state->mode, 0, sizeof(state->mode));
397 state->enable = false;
398 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
399 crtc->base.id, crtc->name, state);
400 }
402 return 0;
403 }
404 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
406 /**
407 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
408 * @state: the CRTC whose incoming state to update
409 * @blob: pointer to blob property to use for mode
410 *
411 * Set a mode (originating from a blob property) on the desired CRTC state.
412 * This function will take a reference on the blob property for the CRTC state,
413 * and release the reference held on the state's existing mode property, if any
414 * was set.
415 *
416 * RETURNS:
417 * Zero on success, error code on failure. Cannot return -EDEADLK.
418 */
419 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
420 struct drm_property_blob *blob)
421 {
422 struct drm_crtc *crtc = state->crtc;
424 if (blob == state->mode_blob)
425 return 0;
427 drm_property_blob_put(state->mode_blob);
428 state->mode_blob = NULL;
430 memset(&state->mode, 0, sizeof(state->mode));
432 if (blob) {
433 int ret;
435 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
436 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n",
437 crtc->base.id, crtc->name,
438 blob->length);
439 return -EINVAL;
440 }
442 ret = drm_mode_convert_umode(crtc->dev,
443 &state->mode, blob->data);
444 if (ret) {
445 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
446 crtc->base.id, crtc->name,
447 ret, drm_get_mode_status_name(state->mode.status));
448 drm_mode_debug_printmodeline(&state->mode);
449 return -EINVAL;
450 }
452 state->mode_blob = drm_property_blob_get(blob);
453 state->enable = true;
454 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
455 state->mode.name, crtc->base.id, crtc->name,
456 state);
457 } else {
458 state->enable = false;
459 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
460 crtc->base.id, crtc->name, state);
461 }
463 return 0;
464 }
465 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
467 /**
468 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
469 * @dev: DRM device
470 * @blob: a pointer to the member blob to be replaced
471 * @blob_id: ID of the new blob
472 * @expected_size: total expected size of the blob data (in bytes)
473 * @expected_elem_size: expected element size of the blob data (in bytes)
474 * @replaced: did the blob get replaced?
475 *
476 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
477 * @blob becomes NULL.
478 *
479 * If @expected_size is positive the new blob length is expected to be equal
480 * to @expected_size bytes. If @expected_elem_size is positive the new blob
481 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
482 * an error is returned.
483 *
484 * @replaced will indicate to the caller whether the blob was replaced or not.
485 * If the old and new blobs were in fact the same blob @replaced will be false
486 * otherwise it will be true.
487 *
488 * RETURNS:
489 * Zero on success, error code on failure.
490 */
491 static int
492 drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
493 struct drm_property_blob **blob,
494 uint64_t blob_id,
495 ssize_t expected_size,
496 ssize_t expected_elem_size,
497 bool *replaced)
498 {
499 struct drm_property_blob *new_blob = NULL;
501 if (blob_id != 0) {
502 new_blob = drm_property_lookup_blob(dev, blob_id);
503 if (new_blob == NULL)
504 return -EINVAL;
506 if (expected_size > 0 &&
507 new_blob->length != expected_size) {
508 drm_property_blob_put(new_blob);
509 return -EINVAL;
510 }
511 if (expected_elem_size > 0 &&
512 new_blob->length % expected_elem_size != 0) {
513 drm_property_blob_put(new_blob);
514 return -EINVAL;
515 }
516 }
518 *replaced |= drm_property_replace_blob(blob, new_blob);
519 drm_property_blob_put(new_blob);
521 return 0;
522 }
524 /**
525 * drm_atomic_crtc_set_property - set property on CRTC
526 * @crtc: the drm CRTC to set a property on
527 * @state: the state object to update with the new property value
528 * @property: the property to set
529 * @val: the new property value
530 *
531 * This function handles generic/core properties and calls out to driver's
532 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
533 * consistent behavior you must call this function rather than the driver hook
534 * directly.
535 *
536 * RETURNS:
537 * Zero on success, error code on failure
538 */
539 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
540 struct drm_crtc_state *state, struct drm_property *property,
541 uint64_t val)
542 {
543 struct drm_device *dev = crtc->dev;
544 struct drm_mode_config *config = &dev->mode_config;
545 bool replaced = false;
546 int ret;
548 if (property == config->prop_active)
549 state->active = val;
550 else if (property == config->prop_mode_id) {
551 struct drm_property_blob *mode =
552 drm_property_lookup_blob(dev, val);
553 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
554 drm_property_blob_put(mode);
555 return ret;
556 } else if (property == config->degamma_lut_property) {
557 ret = drm_atomic_replace_property_blob_from_id(dev,
558 &state->degamma_lut,
559 val,
560 -1, sizeof(struct drm_color_lut),
561 &replaced);
562 state->color_mgmt_changed |= replaced;
563 return ret;
564 } else if (property == config->ctm_property) {
565 ret = drm_atomic_replace_property_blob_from_id(dev,
566 &state->ctm,
567 val,
568 sizeof(struct drm_color_ctm), -1,
569 &replaced);
570 state->color_mgmt_changed |= replaced;
571 return ret;
572 } else if (property == config->gamma_lut_property) {
573 ret = drm_atomic_replace_property_blob_from_id(dev,
574 &state->gamma_lut,
575 val,
576 -1, sizeof(struct drm_color_lut),
577 &replaced);
578 state->color_mgmt_changed |= replaced;
579 return ret;
580 } else if (property == config->prop_out_fence_ptr) {
581 s32 __user *fence_ptr = u64_to_user_ptr(val);
583 if (!fence_ptr)
584 return 0;
586 if (put_user(-1, fence_ptr))
587 return -EFAULT;
589 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
590 } else if (crtc->funcs->atomic_set_property) {
591 return crtc->funcs->atomic_set_property(crtc, state, property, val);
592 } else {
593 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
594 crtc->base.id, crtc->name,
595 property->base.id, property->name);
596 return -EINVAL;
597 }
599 return 0;
600 }
601 EXPORT_SYMBOL(drm_atomic_crtc_set_property);
603 /**
604 * drm_atomic_crtc_get_property - get property value from CRTC state
605 * @crtc: the drm CRTC to set a property on
606 * @state: the state object to get the property value from
607 * @property: the property to set
608 * @val: return location for the property value
609 *
610 * This function handles generic/core properties and calls out to driver's
611 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
612 * consistent behavior you must call this function rather than the driver hook
613 * directly.
614 *
615 * RETURNS:
616 * Zero on success, error code on failure
617 */
618 static int
619 drm_atomic_crtc_get_property(struct drm_crtc *crtc,
620 const struct drm_crtc_state *state,
621 struct drm_property *property, uint64_t *val)
622 {
623 struct drm_device *dev = crtc->dev;
624 struct drm_mode_config *config = &dev->mode_config;
626 if (property == config->prop_active)
627 *val = state->active;
628 else if (property == config->prop_mode_id)
629 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
630 else if (property == config->degamma_lut_property)
631 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
632 else if (property == config->ctm_property)
633 *val = (state->ctm) ? state->ctm->base.id : 0;
634 else if (property == config->gamma_lut_property)
635 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
636 else if (property == config->prop_out_fence_ptr)
637 *val = 0;
638 else if (crtc->funcs->atomic_get_property)
639 return crtc->funcs->atomic_get_property(crtc, state, property, val);
640 else
641 return -EINVAL;
643 return 0;
644 }
646 /**
647 * drm_atomic_crtc_check - check crtc state
648 * @crtc: crtc to check
649 * @state: crtc state to check
650 *
651 * Provides core sanity checks for crtc state.
652 *
653 * RETURNS:
654 * Zero on success, error code on failure
655 */
656 static int drm_atomic_crtc_check(struct drm_crtc *crtc,
657 struct drm_crtc_state *state)
658 {
659 /* NOTE: we explicitly don't enforce constraints such as primary
660 * layer covering entire screen, since that is something we want
661 * to allow (on hw that supports it). For hw that does not, it
662 * should be checked in driver's crtc->atomic_check() vfunc.
663 *
664 * TODO: Add generic modeset state checks once we support those.
665 */
667 if (state->active && !state->enable) {
668 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
669 crtc->base.id, crtc->name);
670 return -EINVAL;
671 }
673 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
674 * as this is a kernel-internal detail that userspace should never
675 * be able to trigger. */
676 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
677 WARN_ON(state->enable && !state->mode_blob)) {
678 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
679 crtc->base.id, crtc->name);
680 return -EINVAL;
681 }
683 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
684 WARN_ON(!state->enable && state->mode_blob)) {
685 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
686 crtc->base.id, crtc->name);
687 return -EINVAL;
688 }
690 /*
691 * Reject event generation for when a CRTC is off and stays off.
692 * It wouldn't be hard to implement this, but userspace has a track
693 * record of happily burning through 100% cpu (or worse, crash) when the
694 * display pipe is suspended. To avoid all that fun just reject updates
695 * that ask for events since likely that indicates a bug in the
696 * compositor's drawing loop. This is consistent with the vblank IOCTL
697 * and legacy page_flip IOCTL which also reject service on a disabled
698 * pipe.
699 */
700 if (state->event && !state->active && !crtc->state->active) {
701 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
702 crtc->base.id, crtc->name);
703 return -EINVAL;
704 }
706 return 0;
707 }
709 static void drm_atomic_crtc_print_state(struct drm_printer *p,
710 const struct drm_crtc_state *state)
711 {
712 struct drm_crtc *crtc = state->crtc;
714 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
715 drm_printf(p, "\tenable=%d\n", state->enable);
716 drm_printf(p, "\tactive=%d\n", state->active);
717 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
718 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
719 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
720 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
721 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
722 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
723 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
724 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
725 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
727 if (crtc->funcs->atomic_print_state)
728 crtc->funcs->atomic_print_state(p, state);
729 }
731 /**
732 * drm_atomic_connector_check - check connector state
733 * @connector: connector to check
734 * @state: connector state to check
735 *
736 * Provides core sanity checks for connector state.
737 *
738 * RETURNS:
739 * Zero on success, error code on failure
740 */
741 static int drm_atomic_connector_check(struct drm_connector *connector,
742 struct drm_connector_state *state)
743 {
744 struct drm_crtc_state *crtc_state;
745 struct drm_writeback_job *writeback_job = state->writeback_job;
747 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
748 return 0;
750 if (writeback_job->fb && !state->crtc) {
751 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
752 connector->base.id, connector->name);
753 return -EINVAL;
754 }
756 if (state->crtc)
757 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
758 state->crtc);
760 if (writeback_job->fb && !crtc_state->active) {
761 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
762 connector->base.id, connector->name,
763 state->crtc->base.id);
764 return -EINVAL;
765 }
767 if (writeback_job->out_fence && !writeback_job->fb) {
768 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
769 connector->base.id, connector->name);
770 return -EINVAL;
771 }
773 return 0;
774 }
776 /**
777 * drm_atomic_get_plane_state - get plane state
778 * @state: global atomic state object
779 * @plane: plane to get state object for
780 *
781 * This function returns the plane state for the given plane, allocating it if
782 * needed. It will also grab the relevant plane lock to make sure that the state
783 * is consistent.
784 *
785 * Returns:
786 *
787 * Either the allocated state or the error code encoded into the pointer. When
788 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
789 * entire atomic sequence must be restarted. All other errors are fatal.
790 */
791 struct drm_plane_state *
792 drm_atomic_get_plane_state(struct drm_atomic_state *state,
793 struct drm_plane *plane)
794 {
795 int ret, index = drm_plane_index(plane);
796 struct drm_plane_state *plane_state;
798 WARN_ON(!state->acquire_ctx);
800 /* the legacy pointers should never be set */
801 WARN_ON(plane->fb);
802 WARN_ON(plane->old_fb);
803 WARN_ON(plane->crtc);
805 plane_state = drm_atomic_get_existing_plane_state(state, plane);
806 if (plane_state)
807 return plane_state;
809 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
810 if (ret)
811 return ERR_PTR(ret);
813 plane_state = plane->funcs->atomic_duplicate_state(plane);
814 if (!plane_state)
815 return ERR_PTR(-ENOMEM);
817 state->planes[index].state = plane_state;
818 state->planes[index].ptr = plane;
819 state->planes[index].old_state = plane->state;
820 state->planes[index].new_state = plane_state;
821 plane_state->state = state;
823 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
824 plane->base.id, plane->name, plane_state, state);
826 if (plane_state->crtc) {
827 struct drm_crtc_state *crtc_state;
829 crtc_state = drm_atomic_get_crtc_state(state,
830 plane_state->crtc);
831 if (IS_ERR(crtc_state))
832 return ERR_CAST(crtc_state);
833 }
835 return plane_state;
836 }
837 EXPORT_SYMBOL(drm_atomic_get_plane_state);
839 /**
840 * drm_atomic_plane_set_property - set property on plane
841 * @plane: the drm plane to set a property on
842 * @state: the state object to update with the new property value
843 * @property: the property to set
844 * @val: the new property value
845 *
846 * This function handles generic/core properties and calls out to driver's
847 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
848 * consistent behavior you must call this function rather than the driver hook
849 * directly.
850 *
851 * RETURNS:
852 * Zero on success, error code on failure
853 */
854 static int drm_atomic_plane_set_property(struct drm_plane *plane,
855 struct drm_plane_state *state, struct drm_property *property,
856 uint64_t val)
857 {
858 struct drm_device *dev = plane->dev;
859 struct drm_mode_config *config = &dev->mode_config;
861 if (property == config->prop_fb_id) {
862 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
863 drm_atomic_set_fb_for_plane(state, fb);
864 if (fb)
865 drm_framebuffer_put(fb);
866 } else if (property == config->prop_in_fence_fd) {
867 if (state->fence)
868 return -EINVAL;
870 if (U642I64(val) == -1)
871 return 0;
873 state->fence = sync_file_get_fence(val);
874 if (!state->fence)
875 return -EINVAL;
877 } else if (property == config->prop_crtc_id) {
878 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
879 return drm_atomic_set_crtc_for_plane(state, crtc);
880 } else if (property == config->prop_crtc_x) {
881 state->crtc_x = U642I64(val);
882 } else if (property == config->prop_crtc_y) {
883 state->crtc_y = U642I64(val);
884 } else if (property == config->prop_crtc_w) {
885 state->crtc_w = val;
886 } else if (property == config->prop_crtc_h) {
887 state->crtc_h = val;
888 } else if (property == config->prop_src_x) {
889 state->src_x = val;
890 } else if (property == config->prop_src_y) {
891 state->src_y = val;
892 } else if (property == config->prop_src_w) {
893 state->src_w = val;
894 } else if (property == config->prop_src_h) {
895 state->src_h = val;
896 } else if (property == plane->alpha_property) {
897 state->alpha = val;
898 } else if (property == plane->rotation_property) {
899 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
900 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
901 plane->base.id, plane->name, val);
902 return -EINVAL;
903 }
904 state->rotation = val;
905 } else if (property == plane->zpos_property) {
906 state->zpos = val;
907 } else if (property == plane->color_encoding_property) {
908 state->color_encoding = val;
909 } else if (property == plane->color_range_property) {
910 state->color_range = val;
911 } else if (plane->funcs->atomic_set_property) {
912 return plane->funcs->atomic_set_property(plane, state,
913 property, val);
914 } else {
915 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
916 plane->base.id, plane->name,
917 property->base.id, property->name);
918 return -EINVAL;
919 }
921 return 0;
922 }
924 /**
925 * drm_atomic_plane_get_property - get property value from plane state
926 * @plane: the drm plane to set a property on
927 * @state: the state object to get the property value from
928 * @property: the property to set
929 * @val: return location for the property value
930 *
931 * This function handles generic/core properties and calls out to driver's
932 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
933 * consistent behavior you must call this function rather than the driver hook
934 * directly.
935 *
936 * RETURNS:
937 * Zero on success, error code on failure
938 */
939 static int
940 drm_atomic_plane_get_property(struct drm_plane *plane,
941 const struct drm_plane_state *state,
942 struct drm_property *property, uint64_t *val)
943 {
944 struct drm_device *dev = plane->dev;
945 struct drm_mode_config *config = &dev->mode_config;
947 if (property == config->prop_fb_id) {
948 *val = (state->fb) ? state->fb->base.id : 0;
949 } else if (property == config->prop_in_fence_fd) {
950 *val = -1;
951 } else if (property == config->prop_crtc_id) {
952 *val = (state->crtc) ? state->crtc->base.id : 0;
953 } else if (property == config->prop_crtc_x) {
954 *val = I642U64(state->crtc_x);
955 } else if (property == config->prop_crtc_y) {
956 *val = I642U64(state->crtc_y);
957 } else if (property == config->prop_crtc_w) {
958 *val = state->crtc_w;
959 } else if (property == config->prop_crtc_h) {
960 *val = state->crtc_h;
961 } else if (property == config->prop_src_x) {
962 *val = state->src_x;
963 } else if (property == config->prop_src_y) {
964 *val = state->src_y;
965 } else if (property == config->prop_src_w) {
966 *val = state->src_w;
967 } else if (property == config->prop_src_h) {
968 *val = state->src_h;
969 } else if (property == plane->alpha_property) {
970 *val = state->alpha;
971 } else if (property == plane->rotation_property) {
972 *val = state->rotation;
973 } else if (property == plane->zpos_property) {
974 *val = state->zpos;
975 } else if (property == plane->color_encoding_property) {
976 *val = state->color_encoding;
977 } else if (property == plane->color_range_property) {
978 *val = state->color_range;
979 } else if (plane->funcs->atomic_get_property) {
980 return plane->funcs->atomic_get_property(plane, state, property, val);
981 } else {
982 return -EINVAL;
983 }
985 return 0;
986 }
988 static bool
989 plane_switching_crtc(struct drm_atomic_state *state,
990 struct drm_plane *plane,
991 struct drm_plane_state *plane_state)
992 {
993 if (!plane->state->crtc || !plane_state->crtc)
994 return false;
996 if (plane->state->crtc == plane_state->crtc)
997 return false;
999 /* This could be refined, but currently there's no helper or driver code
1000 * to implement direct switching of active planes nor userspace to take
1001 * advantage of more direct plane switching without the intermediate
1002 * full OFF state.
1003 */
1004 return true;
1005 }
1007 /**
1008 * drm_atomic_plane_check - check plane state
1009 * @plane: plane to check
1010 * @state: plane state to check
1011 *
1012 * Provides core sanity checks for plane state.
1013 *
1014 * RETURNS:
1015 * Zero on success, error code on failure
1016 */
1017 static int drm_atomic_plane_check(struct drm_plane *plane,
1018 struct drm_plane_state *state)
1019 {
1020 unsigned int fb_width, fb_height;
1021 int ret;
1023 /* either *both* CRTC and FB must be set, or neither */
1024 if (state->crtc && !state->fb) {
1025 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
1026 plane->base.id, plane->name);
1027 return -EINVAL;
1028 } else if (state->fb && !state->crtc) {
1029 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
1030 plane->base.id, plane->name);
1031 return -EINVAL;
1032 }
1034 /* if disabled, we don't care about the rest of the state: */
1035 if (!state->crtc)
1036 return 0;
1038 /* Check whether this plane is usable on this CRTC */
1039 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
1040 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
1041 state->crtc->base.id, state->crtc->name,
1042 plane->base.id, plane->name);
1043 return -EINVAL;
1044 }
1046 /* Check whether this plane supports the fb pixel format. */
1047 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
1048 state->fb->modifier);
1049 if (ret) {
1050 struct drm_format_name_buf format_name;
1051 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
1052 plane->base.id, plane->name,
1053 drm_get_format_name(state->fb->format->format,
1054 &format_name),
1055 state->fb->modifier);
1056 return ret;
1057 }
1059 /* Give drivers some help against integer overflows */
1060 if (state->crtc_w > INT_MAX ||
1061 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
1062 state->crtc_h > INT_MAX ||
1063 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
1064 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
1065 plane->base.id, plane->name,
1066 state->crtc_w, state->crtc_h,
1067 state->crtc_x, state->crtc_y);
1068 return -ERANGE;
1069 }
1071 fb_width = state->fb->width << 16;
1072 fb_height = state->fb->height << 16;
1074 /* Make sure source coordinates are inside the fb. */
1075 if (state->src_w > fb_width ||
1076 state->src_x > fb_width - state->src_w ||
1077 state->src_h > fb_height ||
1078 state->src_y > fb_height - state->src_h) {
1079 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
1080 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
1081 plane->base.id, plane->name,
1082 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
1083 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
1084 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
1085 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
1086 state->fb->width, state->fb->height);
1087 return -ENOSPC;
1088 }
1090 if (plane_switching_crtc(state->state, plane, state)) {
1091 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
1092 plane->base.id, plane->name);
1093 return -EINVAL;
1094 }
1096 return 0;
1097 }
1099 static void drm_atomic_plane_print_state(struct drm_printer *p,
1100 const struct drm_plane_state *state)
1101 {
1102 struct drm_plane *plane = state->plane;
1103 struct drm_rect src = drm_plane_state_src(state);
1104 struct drm_rect dest = drm_plane_state_dest(state);
1106 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
1107 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1108 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
1109 if (state->fb)
1110 drm_framebuffer_print_info(p, 2, state->fb);
1111 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
1112 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
1113 drm_printf(p, "\trotation=%x\n", state->rotation);
1114 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
1115 drm_printf(p, "\tcolor-encoding=%s\n",
1116 drm_get_color_encoding_name(state->color_encoding));
1117 drm_printf(p, "\tcolor-range=%s\n",
1118 drm_get_color_range_name(state->color_range));
1120 if (plane->funcs->atomic_print_state)
1121 plane->funcs->atomic_print_state(p, state);
1122 }
1124 /**
1125 * DOC: handling driver private state
1126 *
1127 * Very often the DRM objects exposed to userspace in the atomic modeset api
1128 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1129 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1130 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1131 * planes or CRTCs, and so on) it makes sense to model these as independent
1132 * objects. Drivers then need to do similar state tracking and commit ordering for
1133 * such private (since not exposed to userpace) objects as the atomic core and
1134 * helpers already provide for connectors, planes and CRTCs.
1135 *
1136 * To make this easier on drivers the atomic core provides some support to track
1137 * driver private state objects using struct &drm_private_obj, with the
1138 * associated state struct &drm_private_state.
1139 *
1140 * Similar to userspace-exposed objects, private state structures can be
1141 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1142 * does not take care of locking, drivers should wrap it for each type of
1143 * private state object they have with the required call to drm_modeset_lock()
1144 * for the corresponding &drm_modeset_lock.
1145 *
1146 * All private state structures contained in a &drm_atomic_state update can be
1147 * iterated using for_each_oldnew_private_obj_in_state(),
1148 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1149 * Drivers are recommended to wrap these for each type of driver private state
1150 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1151 * least if they want to iterate over all objects of a given type.
1152 *
1153 * An earlier way to handle driver private state was by subclassing struct
1154 * &drm_atomic_state. But since that encourages non-standard ways to implement
1155 * the check/commit split atomic requires (by using e.g. "check and rollback or
1156 * commit instead" of "duplicate state, check, then either commit or release
1157 * duplicated state) it is deprecated in favour of using &drm_private_state.
1158 */
1160 /**
1161 * drm_atomic_private_obj_init - initialize private object
1162 * @obj: private object
1163 * @state: initial private object state
1164 * @funcs: pointer to the struct of function pointers that identify the object
1165 * type
1166 *
1167 * Initialize the private object, which can be embedded into any
1168 * driver private object that needs its own atomic state.
1169 */
1170 void
1171 drm_atomic_private_obj_init(struct drm_private_obj *obj,
1172 struct drm_private_state *state,
1173 const struct drm_private_state_funcs *funcs)
1174 {
1175 memset(obj, 0, sizeof(*obj));
1177 obj->state = state;
1178 obj->funcs = funcs;
1179 }
1180 EXPORT_SYMBOL(drm_atomic_private_obj_init);
1182 /**
1183 * drm_atomic_private_obj_fini - finalize private object
1184 * @obj: private object
1185 *
1186 * Finalize the private object.
1187 */
1188 void
1189 drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1190 {
1191 obj->funcs->atomic_destroy_state(obj, obj->state);
1192 }
1193 EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1195 /**
1196 * drm_atomic_get_private_obj_state - get private object state
1197 * @state: global atomic state
1198 * @obj: private object to get the state for
1199 *
1200 * This function returns the private object state for the given private object,
1201 * allocating the state if needed. It does not grab any locks as the caller is
1202 * expected to care of any required locking.
1203 *
1204 * RETURNS:
1205 *
1206 * Either the allocated state or the error code encoded into a pointer.
1207 */
1208 struct drm_private_state *
1209 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1210 struct drm_private_obj *obj)
1211 {
1212 int index, num_objs, i;
1213 size_t size;
1214 struct __drm_private_objs_state *arr;
1215 struct drm_private_state *obj_state;
1217 for (i = 0; i < state->num_private_objs; i++)
1218 if (obj == state->private_objs[i].ptr)
1219 return state->private_objs[i].state;
1221 num_objs = state->num_private_objs + 1;
1222 size = sizeof(*state->private_objs) * num_objs;
1223 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1224 if (!arr)
1225 return ERR_PTR(-ENOMEM);
1227 state->private_objs = arr;
1228 index = state->num_private_objs;
1229 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1231 obj_state = obj->funcs->atomic_duplicate_state(obj);
1232 if (!obj_state)
1233 return ERR_PTR(-ENOMEM);
1235 state->private_objs[index].state = obj_state;
1236 state->private_objs[index].old_state = obj->state;
1237 state->private_objs[index].new_state = obj_state;
1238 state->private_objs[index].ptr = obj;
1239 obj_state->state = state;
1241 state->num_private_objs = num_objs;
1243 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1244 obj, obj_state, state);
1246 return obj_state;
1247 }
1248 EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1250 /**
1251 * drm_atomic_get_connector_state - get connector state
1252 * @state: global atomic state object
1253 * @connector: connector to get state object for
1254 *
1255 * This function returns the connector state for the given connector,
1256 * allocating it if needed. It will also grab the relevant connector lock to
1257 * make sure that the state is consistent.
1258 *
1259 * Returns:
1260 *
1261 * Either the allocated state or the error code encoded into the pointer. When
1262 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1263 * entire atomic sequence must be restarted. All other errors are fatal.
1264 */
1265 struct drm_connector_state *
1266 drm_atomic_get_connector_state(struct drm_atomic_state *state,
1267 struct drm_connector *connector)
1268 {
1269 int ret, index;
1270 struct drm_mode_config *config = &connector->dev->mode_config;
1271 struct drm_connector_state *connector_state;
1273 WARN_ON(!state->acquire_ctx);
1275 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1276 if (ret)
1277 return ERR_PTR(ret);
1279 index = drm_connector_index(connector);
1281 if (index >= state->num_connector) {
1282 struct __drm_connnectors_state *c;
1283 int alloc = max(index + 1, config->num_connector);
1285 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1286 if (!c)
1287 return ERR_PTR(-ENOMEM);
1289 state->connectors = c;
1290 memset(&state->connectors[state->num_connector], 0,
1291 sizeof(*state->connectors) * (alloc - state->num_connector));
1293 state->num_connector = alloc;
1294 }
1296 if (state->connectors[index].state)
1297 return state->connectors[index].state;
1299 connector_state = connector->funcs->atomic_duplicate_state(connector);
1300 if (!connector_state)
1301 return ERR_PTR(-ENOMEM);
1303 drm_connector_get(connector);
1304 state->connectors[index].state = connector_state;
1305 state->connectors[index].old_state = connector->state;
1306 state->connectors[index].new_state = connector_state;
1307 state->connectors[index].ptr = connector;
1308 connector_state->state = state;
1310 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1311 connector->base.id, connector->name,
1312 connector_state, state);
1314 if (connector_state->crtc) {
1315 struct drm_crtc_state *crtc_state;
1317 crtc_state = drm_atomic_get_crtc_state(state,
1318 connector_state->crtc);
1319 if (IS_ERR(crtc_state))
1320 return ERR_CAST(crtc_state);
1321 }
1323 return connector_state;
1324 }
1325 EXPORT_SYMBOL(drm_atomic_get_connector_state);
1327 /**
1328 * drm_atomic_connector_set_property - set property on connector.
1329 * @connector: the drm connector to set a property on
1330 * @state: the state object to update with the new property value
1331 * @property: the property to set
1332 * @val: the new property value
1333 *
1334 * This function handles generic/core properties and calls out to driver's
1335 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1336 * consistent behavior you must call this function rather than the driver hook
1337 * directly.
1338 *
1339 * RETURNS:
1340 * Zero on success, error code on failure
1341 */
1342 static int drm_atomic_connector_set_property(struct drm_connector *connector,
1343 struct drm_connector_state *state, struct drm_property *property,
1344 uint64_t val)
1345 {
1346 struct drm_device *dev = connector->dev;
1347 struct drm_mode_config *config = &dev->mode_config;
1349 if (property == config->prop_crtc_id) {
1350 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1351 return drm_atomic_set_crtc_for_connector(state, crtc);
1352 } else if (property == config->dpms_property) {
1353 /* setting DPMS property requires special handling, which
1354 * is done in legacy setprop path for us. Disallow (for
1355 * now?) atomic writes to DPMS property:
1356 */
1357 return -EINVAL;
1358 } else if (property == config->tv_select_subconnector_property) {
1359 state->tv.subconnector = val;
1360 } else if (property == config->tv_left_margin_property) {
1361 state->tv.margins.left = val;
1362 } else if (property == config->tv_right_margin_property) {
1363 state->tv.margins.right = val;
1364 } else if (property == config->tv_top_margin_property) {
1365 state->tv.margins.top = val;
1366 } else if (property == config->tv_bottom_margin_property) {
1367 state->tv.margins.bottom = val;
1368 } else if (property == config->tv_mode_property) {
1369 state->tv.mode = val;
1370 } else if (property == config->tv_brightness_property) {
1371 state->tv.brightness = val;
1372 } else if (property == config->tv_contrast_property) {
1373 state->tv.contrast = val;
1374 } else if (property == config->tv_flicker_reduction_property) {
1375 state->tv.flicker_reduction = val;
1376 } else if (property == config->tv_overscan_property) {
1377 state->tv.overscan = val;
1378 } else if (property == config->tv_saturation_property) {
1379 state->tv.saturation = val;
1380 } else if (property == config->tv_hue_property) {
1381 state->tv.hue = val;
1382 } else if (property == config->link_status_property) {
1383 /* Never downgrade from GOOD to BAD on userspace's request here,
1384 * only hw issues can do that.
1385 *
1386 * For an atomic property the userspace doesn't need to be able
1387 * to understand all the properties, but needs to be able to
1388 * restore the state it wants on VT switch. So if the userspace
1389 * tries to change the link_status from GOOD to BAD, driver
1390 * silently rejects it and returns a 0. This prevents userspace
1391 * from accidently breaking the display when it restores the
1392 * state.
1393 */
1394 if (state->link_status != DRM_LINK_STATUS_GOOD)
1395 state->link_status = val;
1396 } else if (property == config->aspect_ratio_property) {
1397 state->picture_aspect_ratio = val;
1398 } else if (property == config->content_type_property) {
1399 state->content_type = val;
1400 } else if (property == connector->scaling_mode_property) {
1401 state->scaling_mode = val;
1402 } else if (property == connector->content_protection_property) {
1403 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1404 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1405 return -EINVAL;
1406 }
1407 state->content_protection = val;
1408 } else if (property == config->writeback_fb_id_property) {
1409 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
1410 int ret = drm_atomic_set_writeback_fb_for_connector(state, fb);
1411 if (fb)
1412 drm_framebuffer_put(fb);
1413 return ret;
1414 } else if (property == config->writeback_out_fence_ptr_property) {
1415 s32 __user *fence_ptr = u64_to_user_ptr(val);
1417 return set_out_fence_for_connector(state->state, connector,
1418 fence_ptr);
1419 } else if (connector->funcs->atomic_set_property) {
1420 return connector->funcs->atomic_set_property(connector,
1421 state, property, val);
1422 } else {
1423 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
1424 connector->base.id, connector->name,
1425 property->base.id, property->name);
1426 return -EINVAL;
1427 }
1429 return 0;
1430 }
1432 static void drm_atomic_connector_print_state(struct drm_printer *p,
1433 const struct drm_connector_state *state)
1434 {
1435 struct drm_connector *connector = state->connector;
1437 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1438 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1440 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1441 if (state->writeback_job && state->writeback_job->fb)
1442 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1444 if (connector->funcs->atomic_print_state)
1445 connector->funcs->atomic_print_state(p, state);
1446 }
1448 /**
1449 * drm_atomic_connector_get_property - get property value from connector state
1450 * @connector: the drm connector to set a property on
1451 * @state: the state object to get the property value from
1452 * @property: the property to set
1453 * @val: return location for the property value
1454 *
1455 * This function handles generic/core properties and calls out to driver's
1456 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1457 * consistent behavior you must call this function rather than the driver hook
1458 * directly.
1459 *
1460 * RETURNS:
1461 * Zero on success, error code on failure
1462 */
1463 static int
1464 drm_atomic_connector_get_property(struct drm_connector *connector,
1465 const struct drm_connector_state *state,
1466 struct drm_property *property, uint64_t *val)
1467 {
1468 struct drm_device *dev = connector->dev;
1469 struct drm_mode_config *config = &dev->mode_config;
1471 if (property == config->prop_crtc_id) {
1472 *val = (state->crtc) ? state->crtc->base.id : 0;
1473 } else if (property == config->dpms_property) {
1474 *val = connector->dpms;
1475 } else if (property == config->tv_select_subconnector_property) {
1476 *val = state->tv.subconnector;
1477 } else if (property == config->tv_left_margin_property) {
1478 *val = state->tv.margins.left;
1479 } else if (property == config->tv_right_margin_property) {
1480 *val = state->tv.margins.right;
1481 } else if (property == config->tv_top_margin_property) {
1482 *val = state->tv.margins.top;
1483 } else if (property == config->tv_bottom_margin_property) {
1484 *val = state->tv.margins.bottom;
1485 } else if (property == config->tv_mode_property) {
1486 *val = state->tv.mode;
1487 } else if (property == config->tv_brightness_property) {
1488 *val = state->tv.brightness;
1489 } else if (property == config->tv_contrast_property) {
1490 *val = state->tv.contrast;
1491 } else if (property == config->tv_flicker_reduction_property) {
1492 *val = state->tv.flicker_reduction;
1493 } else if (property == config->tv_overscan_property) {
1494 *val = state->tv.overscan;
1495 } else if (property == config->tv_saturation_property) {
1496 *val = state->tv.saturation;
1497 } else if (property == config->tv_hue_property) {
1498 *val = state->tv.hue;
1499 } else if (property == config->link_status_property) {
1500 *val = state->link_status;
1501 } else if (property == config->aspect_ratio_property) {
1502 *val = state->picture_aspect_ratio;
1503 } else if (property == config->content_type_property) {
1504 *val = state->content_type;
1505 } else if (property == connector->scaling_mode_property) {
1506 *val = state->scaling_mode;
1507 } else if (property == connector->content_protection_property) {
1508 *val = state->content_protection;
1509 } else if (property == config->writeback_fb_id_property) {
1510 /* Writeback framebuffer is one-shot, write and forget */
1511 *val = 0;
1512 } else if (property == config->writeback_out_fence_ptr_property) {
1513 *val = 0;
1514 } else if (connector->funcs->atomic_get_property) {
1515 return connector->funcs->atomic_get_property(connector,
1516 state, property, val);
1517 } else {
1518 return -EINVAL;
1519 }
1521 return 0;
1522 }
1524 int drm_atomic_get_property(struct drm_mode_object *obj,
1525 struct drm_property *property, uint64_t *val)
1526 {
1527 struct drm_device *dev = property->dev;
1528 int ret;
1530 switch (obj->type) {
1531 case DRM_MODE_OBJECT_CONNECTOR: {
1532 struct drm_connector *connector = obj_to_connector(obj);
1533 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1534 ret = drm_atomic_connector_get_property(connector,
1535 connector->state, property, val);
1536 break;
1537 }
1538 case DRM_MODE_OBJECT_CRTC: {
1539 struct drm_crtc *crtc = obj_to_crtc(obj);
1540 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1541 ret = drm_atomic_crtc_get_property(crtc,
1542 crtc->state, property, val);
1543 break;
1544 }
1545 case DRM_MODE_OBJECT_PLANE: {
1546 struct drm_plane *plane = obj_to_plane(obj);
1547 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1548 ret = drm_atomic_plane_get_property(plane,
1549 plane->state, property, val);
1550 break;
1551 }
1552 default:
1553 ret = -EINVAL;
1554 break;
1555 }
1557 return ret;
1558 }
1560 /**
1561 * drm_atomic_set_crtc_for_plane - set crtc for plane
1562 * @plane_state: the plane whose incoming state to update
1563 * @crtc: crtc to use for the plane
1564 *
1565 * Changing the assigned crtc for a plane requires us to grab the lock and state
1566 * for the new crtc, as needed. This function takes care of all these details
1567 * besides updating the pointer in the state object itself.
1568 *
1569 * Returns:
1570 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1571 * then the w/w mutex code has detected a deadlock and the entire atomic
1572 * sequence must be restarted. All other errors are fatal.
1573 */
1574 int
1575 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1576 struct drm_crtc *crtc)
1577 {
1578 struct drm_plane *plane = plane_state->plane;
1579 struct drm_crtc_state *crtc_state;
1580 /* Nothing to do for same crtc*/
1581 if (plane_state->crtc == crtc)
1582 return 0;
1583 if (plane_state->crtc) {
1584 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1585 plane_state->crtc);
1586 if (WARN_ON(IS_ERR(crtc_state)))
1587 return PTR_ERR(crtc_state);
1589 crtc_state->plane_mask &= ~drm_plane_mask(plane);
1590 }
1592 plane_state->crtc = crtc;
1594 if (crtc) {
1595 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1596 crtc);
1597 if (IS_ERR(crtc_state))
1598 return PTR_ERR(crtc_state);
1599 crtc_state->plane_mask |= drm_plane_mask(plane);
1600 }
1602 if (crtc)
1603 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
1604 plane->base.id, plane->name, plane_state,
1605 crtc->base.id, crtc->name);
1606 else
1607 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
1608 plane->base.id, plane->name, plane_state);
1610 return 0;
1611 }
1612 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1614 /**
1615 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1616 * @plane_state: atomic state object for the plane
1617 * @fb: fb to use for the plane
1618 *
1619 * Changing the assigned framebuffer for a plane requires us to grab a reference
1620 * to the new fb and drop the reference to the old fb, if there is one. This
1621 * function takes care of all these details besides updating the pointer in the
1622 * state object itself.
1623 */
1624 void
1625 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1626 struct drm_framebuffer *fb)
1627 {
1628 struct drm_plane *plane = plane_state->plane;
1630 if (fb)
1631 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n",
1632 fb->base.id, plane->base.id, plane->name,
1633 plane_state);
1634 else
1635 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n",
1636 plane->base.id, plane->name, plane_state);
1638 drm_framebuffer_assign(&plane_state->fb, fb);
1639 }
1640 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1642 /**
1643 * drm_atomic_set_fence_for_plane - set fence for plane
1644 * @plane_state: atomic state object for the plane
1645 * @fence: dma_fence to use for the plane
1646 *
1647 * Helper to setup the plane_state fence in case it is not set yet.
1648 * By using this drivers doesn't need to worry if the user choose
1649 * implicit or explicit fencing.
1650 *
1651 * This function will not set the fence to the state if it was set
1652 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1653 * drop the reference to the fence as we are not storing it anywhere.
1654 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1655 * with the received implicit fence. In both cases this function consumes a
1656 * reference for @fence.
1657 *
1658 * This way explicit fencing can be used to overrule implicit fencing, which is
1659 * important to make explicit fencing use-cases work: One example is using one
1660 * buffer for 2 screens with different refresh rates. Implicit fencing will
1661 * clamp rendering to the refresh rate of the slower screen, whereas explicit
1662 * fence allows 2 independent render and display loops on a single buffer. If a
1663 * driver allows obeys both implicit and explicit fences for plane updates, then
1664 * it will break all the benefits of explicit fencing.
1665 */
1666 void
1667 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1668 struct dma_fence *fence)
1669 {
1670 if (plane_state->fence) {
1671 dma_fence_put(fence);
1672 return;
1673 }
1675 plane_state->fence = fence;
1676 }
1677 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1679 /**
1680 * drm_atomic_set_crtc_for_connector - set crtc for connector
1681 * @conn_state: atomic state object for the connector
1682 * @crtc: crtc to use for the connector
1683 *
1684 * Changing the assigned crtc for a connector requires us to grab the lock and
1685 * state for the new crtc, as needed. This function takes care of all these
1686 * details besides updating the pointer in the state object itself.
1687 *
1688 * Returns:
1689 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1690 * then the w/w mutex code has detected a deadlock and the entire atomic
1691 * sequence must be restarted. All other errors are fatal.
1692 */
1693 int
1694 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1695 struct drm_crtc *crtc)
1696 {
1697 struct drm_connector *connector = conn_state->connector;
1698 struct drm_crtc_state *crtc_state;
1700 if (conn_state->crtc == crtc)
1701 return 0;
1703 if (conn_state->crtc) {
1704 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1705 conn_state->crtc);
1707 crtc_state->connector_mask &=
1708 ~drm_connector_mask(conn_state->connector);
1710 drm_connector_put(conn_state->connector);
1711 conn_state->crtc = NULL;
1712 }
1714 if (crtc) {
1715 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1716 if (IS_ERR(crtc_state))
1717 return PTR_ERR(crtc_state);
1719 crtc_state->connector_mask |=
1720 drm_connector_mask(conn_state->connector);
1722 drm_connector_get(conn_state->connector);
1723 conn_state->crtc = crtc;
1725 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
1726 connector->base.id, connector->name,
1727 conn_state, crtc->base.id, crtc->name);
1728 } else {
1729 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
1730 connector->base.id, connector->name,
1731 conn_state);
1732 }
1734 return 0;
1735 }
1736 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1738 /*
1739 * drm_atomic_get_writeback_job - return or allocate a writeback job
1740 * @conn_state: Connector state to get the job for
1741 *
1742 * Writeback jobs have a different lifetime to the atomic state they are
1743 * associated with. This convenience function takes care of allocating a job
1744 * if there isn't yet one associated with the connector state, otherwise
1745 * it just returns the existing job.
1746 *
1747 * Returns: The writeback job for the given connector state
1748 */
1749 static struct drm_writeback_job *
1750 drm_atomic_get_writeback_job(struct drm_connector_state *conn_state)
1751 {
1752 WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
1754 if (!conn_state->writeback_job)
1755 conn_state->writeback_job =
1756 kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL);
1758 return conn_state->writeback_job;
1759 }
1761 /**
1762 * drm_atomic_set_writeback_fb_for_connector - set writeback framebuffer
1763 * @conn_state: atomic state object for the connector
1764 * @fb: fb to use for the connector
1765 *
1766 * This is used to set the framebuffer for a writeback connector, which outputs
1767 * to a buffer instead of an actual physical connector.
1768 * Changing the assigned framebuffer requires us to grab a reference to the new
1769 * fb and drop the reference to the old fb, if there is one. This function
1770 * takes care of all these details besides updating the pointer in the
1771 * state object itself.
1772 *
1773 * Note: The only way conn_state can already have an fb set is if the commit
1774 * sets the property more than once.
1775 *
1776 * See also: drm_writeback_connector_init()
1777 *
1778 * Returns: 0 on success
1779 */
1780 int drm_atomic_set_writeback_fb_for_connector(
1781 struct drm_connector_state *conn_state,
1782 struct drm_framebuffer *fb)
1783 {
1784 struct drm_writeback_job *job =
1785 drm_atomic_get_writeback_job(conn_state);
1786 if (!job)
1787 return -ENOMEM;
1789 drm_framebuffer_assign(&job->fb, fb);
1791 if (fb)
1792 DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n",
1793 fb->base.id, conn_state);
1794 else
1795 DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n",
1796 conn_state);
1798 return 0;
1799 }
1800 EXPORT_SYMBOL(drm_atomic_set_writeback_fb_for_connector);
1802 /**
1803 * drm_atomic_add_affected_connectors - add connectors for crtc
1804 * @state: atomic state
1805 * @crtc: DRM crtc
1806 *
1807 * This function walks the current configuration and adds all connectors
1808 * currently using @crtc to the atomic configuration @state. Note that this
1809 * function must acquire the connection mutex. This can potentially cause
1810 * unneeded seralization if the update is just for the planes on one crtc. Hence
1811 * drivers and helpers should only call this when really needed (e.g. when a
1812 * full modeset needs to happen due to some change).
1813 *
1814 * Returns:
1815 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1816 * then the w/w mutex code has detected a deadlock and the entire atomic
1817 * sequence must be restarted. All other errors are fatal.
1818 */
1819 int
1820 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1821 struct drm_crtc *crtc)
1822 {
1823 struct drm_mode_config *config = &state->dev->mode_config;
1824 struct drm_connector *connector;
1825 struct drm_connector_state *conn_state;
1826 struct drm_connector_list_iter conn_iter;
1827 struct drm_crtc_state *crtc_state;
1828 int ret;
1830 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1831 if (IS_ERR(crtc_state))
1832 return PTR_ERR(crtc_state);
1834 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1835 if (ret)
1836 return ret;
1838 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1839 crtc->base.id, crtc->name, state);
1841 /*
1842 * Changed connectors are already in @state, so only need to look
1843 * at the connector_mask in crtc_state.
1844 */
1845 drm_connector_list_iter_begin(state->dev, &conn_iter);
1846 drm_for_each_connector_iter(connector, &conn_iter) {
1847 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1848 continue;
1850 conn_state = drm_atomic_get_connector_state(state, connector);
1851 if (IS_ERR(conn_state)) {
1852 drm_connector_list_iter_end(&conn_iter);
1853 return PTR_ERR(conn_state);
1854 }
1855 }
1856 drm_connector_list_iter_end(&conn_iter);
1858 return 0;
1859 }
1860 EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1862 /**
1863 * drm_atomic_add_affected_planes - add planes for crtc
1864 * @state: atomic state
1865 * @crtc: DRM crtc
1866 *
1867 * This function walks the current configuration and adds all planes
1868 * currently used by @crtc to the atomic configuration @state. This is useful
1869 * when an atomic commit also needs to check all currently enabled plane on
1870 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1871 * to avoid special code to force-enable all planes.
1872 *
1873 * Since acquiring a plane state will always also acquire the w/w mutex of the
1874 * current CRTC for that plane (if there is any) adding all the plane states for
1875 * a CRTC will not reduce parallism of atomic updates.
1876 *
1877 * Returns:
1878 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1879 * then the w/w mutex code has detected a deadlock and the entire atomic
1880 * sequence must be restarted. All other errors are fatal.
1881 */
1882 int
1883 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1884 struct drm_crtc *crtc)
1885 {
1886 struct drm_plane *plane;
1888 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1890 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1891 crtc->base.id, crtc->name, state);
1893 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1894 struct drm_plane_state *plane_state =
1895 drm_atomic_get_plane_state(state, plane);
1897 if (IS_ERR(plane_state))
1898 return PTR_ERR(plane_state);
1899 }
1900 return 0;
1901 }
1902 EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1904 /**
1905 * drm_atomic_check_only - check whether a given config would work
1906 * @state: atomic configuration to check
1907 *
1908 * Note that this function can return -EDEADLK if the driver needed to acquire
1909 * more locks but encountered a deadlock. The caller must then do the usual w/w
1910 * backoff dance and restart. All other errors are fatal.
1911 *
1912 * Returns:
1913 * 0 on success, negative error code on failure.
1914 */
1915 int drm_atomic_check_only(struct drm_atomic_state *state)
1916 {
1917 struct drm_device *dev = state->dev;
1918 struct drm_mode_config *config = &dev->mode_config;
1919 struct drm_plane *plane;
1920 struct drm_plane_state *plane_state;
1921 struct drm_crtc *crtc;
1922 struct drm_crtc_state *crtc_state;
1923 struct drm_connector *conn;
1924 struct drm_connector_state *conn_state;
1925 int i, ret = 0;
1927 DRM_DEBUG_ATOMIC("checking %p\n", state);
1929 for_each_new_plane_in_state(state, plane, plane_state, i) {
1930 ret = drm_atomic_plane_check(plane, plane_state);
1931 if (ret) {
1932 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1933 plane->base.id, plane->name);
1934 return ret;
1935 }
1936 }
1938 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1939 ret = drm_atomic_crtc_check(crtc, crtc_state);
1940 if (ret) {
1941 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1942 crtc->base.id, crtc->name);
1943 return ret;
1944 }
1945 }
1947 for_each_new_connector_in_state(state, conn, conn_state, i) {
1948 ret = drm_atomic_connector_check(conn, conn_state);
1949 if (ret) {
1950 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1951 conn->base.id, conn->name);
1952 return ret;
1953 }
1954 }
1956 if (config->funcs->atomic_check) {
1957 ret = config->funcs->atomic_check(state->dev, state);
1959 if (ret) {
1960 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1961 state, ret);
1962 return ret;
1963 }
1964 }
1966 if (!state->allow_modeset) {
1967 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1968 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1969 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1970 crtc->base.id, crtc->name);
1971 return -EINVAL;
1972 }
1973 }
1974 }
1976 return 0;
1977 }
1978 EXPORT_SYMBOL(drm_atomic_check_only);
1980 /**
1981 * drm_atomic_commit - commit configuration atomically
1982 * @state: atomic configuration to check
1983 *
1984 * Note that this function can return -EDEADLK if the driver needed to acquire
1985 * more locks but encountered a deadlock. The caller must then do the usual w/w
1986 * backoff dance and restart. All other errors are fatal.
1987 *
1988 * This function will take its own reference on @state.
1989 * Callers should always release their reference with drm_atomic_state_put().
1990 *
1991 * Returns:
1992 * 0 on success, negative error code on failure.
1993 */
1994 int drm_atomic_commit(struct drm_atomic_state *state)
1995 {
1996 struct drm_mode_config *config = &state->dev->mode_config;
1997 int ret;
1999 ret = drm_atomic_check_only(state);
2000 if (ret)
2001 return ret;
2003 DRM_DEBUG_ATOMIC("committing %p\n", state);
2005 return config->funcs->atomic_commit(state->dev, state, false);
2006 }
2007 EXPORT_SYMBOL(drm_atomic_commit);
2009 /**
2010 * drm_atomic_nonblocking_commit - atomic nonblocking commit
2011 * @state: atomic configuration to check
2012 *
2013 * Note that this function can return -EDEADLK if the driver needed to acquire
2014 * more locks but encountered a deadlock. The caller must then do the usual w/w
2015 * backoff dance and restart. All other errors are fatal.
2016 *
2017 * This function will take its own reference on @state.
2018 * Callers should always release their reference with drm_atomic_state_put().
2019 *
2020 * Returns:
2021 * 0 on success, negative error code on failure.
2022 */
2023 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
2024 {
2025 struct drm_mode_config *config = &state->dev->mode_config;
2026 int ret;
2028 ret = drm_atomic_check_only(state);
2029 if (ret)
2030 return ret;
2032 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
2034 return config->funcs->atomic_commit(state->dev, state, true);
2035 }
2036 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
2038 static void drm_atomic_print_state(const struct drm_atomic_state *state)
2039 {
2040 struct drm_printer p = drm_info_printer(state->dev->dev);
2041 struct drm_plane *plane;
2042 struct drm_plane_state *plane_state;
2043 struct drm_crtc *crtc;
2044 struct drm_crtc_state *crtc_state;
2045 struct drm_connector *connector;
2046 struct drm_connector_state *connector_state;
2047 int i;
2049 DRM_DEBUG_ATOMIC("checking %p\n", state);
2051 for_each_new_plane_in_state(state, plane, plane_state, i)
2052 drm_atomic_plane_print_state(&p, plane_state);
2054 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
2055 drm_atomic_crtc_print_state(&p, crtc_state);
2057 for_each_new_connector_in_state(state, connector, connector_state, i)
2058 drm_atomic_connector_print_state(&p, connector_state);
2059 }
2061 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
2062 bool take_locks)
2063 {
2064 struct drm_mode_config *config = &dev->mode_config;
2065 struct drm_plane *plane;
2066 struct drm_crtc *crtc;
2067 struct drm_connector *connector;
2068 struct drm_connector_list_iter conn_iter;
2070 if (!drm_drv_uses_atomic_modeset(dev))
2071 return;
2073 list_for_each_entry(plane, &config->plane_list, head) {
2074 if (take_locks)
2075 drm_modeset_lock(&plane->mutex, NULL);
2076 drm_atomic_plane_print_state(p, plane->state);
2077 if (take_locks)
2078 drm_modeset_unlock(&plane->mutex);
2079 }
2081 list_for_each_entry(crtc, &config->crtc_list, head) {
2082 if (take_locks)
2083 drm_modeset_lock(&crtc->mutex, NULL);
2084 drm_atomic_crtc_print_state(p, crtc->state);
2085 if (take_locks)
2086 drm_modeset_unlock(&crtc->mutex);
2087 }
2089 drm_connector_list_iter_begin(dev, &conn_iter);
2090 if (take_locks)
2091 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2092 drm_for_each_connector_iter(connector, &conn_iter)
2093 drm_atomic_connector_print_state(p, connector->state);
2094 if (take_locks)
2095 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2096 drm_connector_list_iter_end(&conn_iter);
2097 }
2099 /**
2100 * drm_state_dump - dump entire device atomic state
2101 * @dev: the drm device
2102 * @p: where to print the state to
2103 *
2104 * Just for debugging. Drivers might want an option to dump state
2105 * to dmesg in case of error irq's. (Hint, you probably want to
2106 * ratelimit this!)
2107 *
2108 * The caller must drm_modeset_lock_all(), or if this is called
2109 * from error irq handler, it should not be enabled by default.
2110 * (Ie. if you are debugging errors you might not care that this
2111 * is racey. But calling this without all modeset locks held is
2112 * not inherently safe.)
2113 */
2114 void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
2115 {
2116 __drm_state_dump(dev, p, false);
2117 }
2118 EXPORT_SYMBOL(drm_state_dump);
2120 #ifdef CONFIG_DEBUG_FS
2121 static int drm_state_info(struct seq_file *m, void *data)
2122 {
2123 struct drm_info_node *node = (struct drm_info_node *) m->private;
2124 struct drm_device *dev = node->minor->dev;
2125 struct drm_printer p = drm_seq_file_printer(m);
2127 __drm_state_dump(dev, &p, true);
2129 return 0;
2130 }
2132 /* any use in debugfs files to dump individual planes/crtc/etc? */
2133 static const struct drm_info_list drm_atomic_debugfs_list[] = {
2134 {"state", drm_state_info, 0},
2135 };
2137 int drm_atomic_debugfs_init(struct drm_minor *minor)
2138 {
2139 return drm_debugfs_create_files(drm_atomic_debugfs_list,
2140 ARRAY_SIZE(drm_atomic_debugfs_list),
2141 minor->debugfs_root, minor);
2142 }
2143 #endif
2145 /*
2146 * The big monster ioctl
2147 */
2149 static struct drm_pending_vblank_event *create_vblank_event(
2150 struct drm_crtc *crtc, uint64_t user_data)
2151 {
2152 struct drm_pending_vblank_event *e = NULL;
2154 e = kzalloc(sizeof *e, GFP_KERNEL);
2155 if (!e)
2156 return NULL;
2158 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
2159 e->event.base.length = sizeof(e->event);
2160 e->event.vbl.crtc_id = crtc->base.id;
2161 e->event.vbl.user_data = user_data;
2163 return e;
2164 }
2166 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
2167 struct drm_connector *connector,
2168 int mode)
2169 {
2170 struct drm_connector *tmp_connector;
2171 struct drm_connector_state *new_conn_state;
2172 struct drm_crtc *crtc;
2173 struct drm_crtc_state *crtc_state;
2174 int i, ret, old_mode = connector->dpms;
2175 bool active = false;
2177 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
2178 state->acquire_ctx);
2179 if (ret)
2180 return ret;
2182 if (mode != DRM_MODE_DPMS_ON)
2183 mode = DRM_MODE_DPMS_OFF;
2184 connector->dpms = mode;
2186 crtc = connector->state->crtc;
2187 if (!crtc)
2188 goto out;
2189 ret = drm_atomic_add_affected_connectors(state, crtc);
2190 if (ret)
2191 goto out;
2193 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2194 if (IS_ERR(crtc_state)) {
2195 ret = PTR_ERR(crtc_state);
2196 goto out;
2197 }
2199 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
2200 if (new_conn_state->crtc != crtc)
2201 continue;
2202 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
2203 active = true;
2204 break;
2205 }
2206 }
2208 crtc_state->active = active;
2209 ret = drm_atomic_commit(state);
2210 out:
2211 if (ret != 0)
2212 connector->dpms = old_mode;
2213 return ret;
2214 }
2216 int drm_atomic_set_property(struct drm_atomic_state *state,
2217 struct drm_mode_object *obj,
2218 struct drm_property *prop,
2219 uint64_t prop_value)
2220 {
2221 struct drm_mode_object *ref;
2222 int ret;
2224 if (!drm_property_change_valid_get(prop, prop_value, &ref))
2225 return -EINVAL;
2227 switch (obj->type) {
2228 case DRM_MODE_OBJECT_CONNECTOR: {
2229 struct drm_connector *connector = obj_to_connector(obj);
2230 struct drm_connector_state *connector_state;
2232 connector_state = drm_atomic_get_connector_state(state, connector);
2233 if (IS_ERR(connector_state)) {
2234 ret = PTR_ERR(connector_state);
2235 break;
2236 }
2238 ret = drm_atomic_connector_set_property(connector,
2239 connector_state, prop, prop_value);
2240 break;
2241 }
2242 case DRM_MODE_OBJECT_CRTC: {
2243 struct drm_crtc *crtc = obj_to_crtc(obj);
2244 struct drm_crtc_state *crtc_state;
2246 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2247 if (IS_ERR(crtc_state)) {
2248 ret = PTR_ERR(crtc_state);
2249 break;
2250 }
2252 ret = drm_atomic_crtc_set_property(crtc,
2253 crtc_state, prop, prop_value);
2254 break;
2255 }
2256 case DRM_MODE_OBJECT_PLANE: {
2257 struct drm_plane *plane = obj_to_plane(obj);
2258 struct drm_plane_state *plane_state;
2260 plane_state = drm_atomic_get_plane_state(state, plane);
2261 if (IS_ERR(plane_state)) {
2262 ret = PTR_ERR(plane_state);
2263 break;
2264 }
2266 ret = drm_atomic_plane_set_property(plane,
2267 plane_state, prop, prop_value);
2268 break;
2269 }
2270 default:
2271 ret = -EINVAL;
2272 break;
2273 }
2275 drm_property_change_valid_put(prop, ref);
2276 return ret;
2277 }
2279 /**
2280 * DOC: explicit fencing properties
2281 *
2282 * Explicit fencing allows userspace to control the buffer synchronization
2283 * between devices. A Fence or a group of fences are transfered to/from
2284 * userspace using Sync File fds and there are two DRM properties for that.
2285 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2286 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2287 *
2288 * As a contrast, with implicit fencing the kernel keeps track of any
2289 * ongoing rendering, and automatically ensures that the atomic update waits
2290 * for any pending rendering to complete. For shared buffers represented with
2291 * a &struct dma_buf this is tracked in &struct reservation_object.
2292 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2293 * whereas explicit fencing is what Android wants.
2294 *
2295 * "IN_FENCE_FD”:
2296 * Use this property to pass a fence that DRM should wait on before
2297 * proceeding with the Atomic Commit request and show the framebuffer for
2298 * the plane on the screen. The fence can be either a normal fence or a
2299 * merged one, the sync_file framework will handle both cases and use a
2300 * fence_array if a merged fence is received. Passing -1 here means no
2301 * fences to wait on.
2302 *
2303 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2304 * it will only check if the Sync File is a valid one.
2305 *
2306 * On the driver side the fence is stored on the @fence parameter of
2307 * &struct drm_plane_state. Drivers which also support implicit fencing
2308 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2309 * to make sure there's consistent behaviour between drivers in precedence
2310 * of implicit vs. explicit fencing.
2311 *
2312 * "OUT_FENCE_PTR”:
2313 * Use this property to pass a file descriptor pointer to DRM. Once the
2314 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2315 * the file descriptor number of a Sync File. This Sync File contains the
2316 * CRTC fence that will be signaled when all framebuffers present on the
2317 * Atomic Commit * request for that given CRTC are scanned out on the
2318 * screen.
2319 *
2320 * The Atomic Commit request fails if a invalid pointer is passed. If the
2321 * Atomic Commit request fails for any other reason the out fence fd
2322 * returned will be -1. On a Atomic Commit with the
2323 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2324 *
2325 * Note that out-fences don't have a special interface to drivers and are
2326 * internally represented by a &struct drm_pending_vblank_event in struct
2327 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2328 * helpers and for the DRM event handling for existing userspace.
2329 */
2331 struct drm_out_fence_state {
2332 s32 __user *out_fence_ptr;
2333 struct sync_file *sync_file;
2334 int fd;
2335 };
2337 static int setup_out_fence(struct drm_out_fence_state *fence_state,
2338 struct dma_fence *fence)
2339 {
2340 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2341 if (fence_state->fd < 0)
2342 return fence_state->fd;
2344 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2345 return -EFAULT;
2347 fence_state->sync_file = sync_file_create(fence);
2348 if (!fence_state->sync_file)
2349 return -ENOMEM;
2351 return 0;
2352 }
2354 static int prepare_signaling(struct drm_device *dev,
2355 struct drm_atomic_state *state,
2356 struct drm_mode_atomic *arg,
2357 struct drm_file *file_priv,
2358 struct drm_out_fence_state **fence_state,
2359 unsigned int *num_fences)
2360 {
2361 struct drm_crtc *crtc;
2362 struct drm_crtc_state *crtc_state;
2363 struct drm_connector *conn;
2364 struct drm_connector_state *conn_state;
2365 int i, c = 0, ret;
2367 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2368 return 0;
2370 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2371 s32 __user *fence_ptr;
2373 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2375 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2376 struct drm_pending_vblank_event *e;
2378 e = create_vblank_event(crtc, arg->user_data);
2379 if (!e)
2380 return -ENOMEM;
2382 crtc_state->event = e;
2383 }
2385 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2386 struct drm_pending_vblank_event *e = crtc_state->event;
2388 if (!file_priv)
2389 continue;
2391 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2392 &e->event.base);
2393 if (ret) {
2394 kfree(e);
2395 crtc_state->event = NULL;
2396 return ret;
2397 }
2398 }
2400 if (fence_ptr) {
2401 struct dma_fence *fence;
2402 struct drm_out_fence_state *f;
2404 f = krealloc(*fence_state, sizeof(**fence_state) *
2405 (*num_fences + 1), GFP_KERNEL);
2406 if (!f)
2407 return -ENOMEM;
2409 memset(&f[*num_fences], 0, sizeof(*f));
2411 f[*num_fences].out_fence_ptr = fence_ptr;
2412 *fence_state = f;
2414 fence = drm_crtc_create_fence(crtc);
2415 if (!fence)
2416 return -ENOMEM;
2418 ret = setup_out_fence(&f[(*num_fences)++], fence);
2419 if (ret) {
2420 dma_fence_put(fence);
2421 return ret;
2422 }
2424 crtc_state->event->base.fence = fence;
2425 }
2427 c++;
2428 }
2430 for_each_new_connector_in_state(state, conn, conn_state, i) {
2431 struct drm_writeback_connector *wb_conn;
2432 struct drm_writeback_job *job;
2433 struct drm_out_fence_state *f;
2434 struct dma_fence *fence;
2435 s32 __user *fence_ptr;
2437 fence_ptr = get_out_fence_for_connector(state, conn);
2438 if (!fence_ptr)
2439 continue;
2441 job = drm_atomic_get_writeback_job(conn_state);
2442 if (!job)
2443 return -ENOMEM;
2445 f = krealloc(*fence_state, sizeof(**fence_state) *
2446 (*num_fences + 1), GFP_KERNEL);
2447 if (!f)
2448 return -ENOMEM;
2450 memset(&f[*num_fences], 0, sizeof(*f));
2452 f[*num_fences].out_fence_ptr = fence_ptr;
2453 *fence_state = f;
2455 wb_conn = drm_connector_to_writeback(conn);
2456 fence = drm_writeback_get_out_fence(wb_conn);
2457 if (!fence)
2458 return -ENOMEM;
2460 ret = setup_out_fence(&f[(*num_fences)++], fence);
2461 if (ret) {
2462 dma_fence_put(fence);
2463 return ret;
2464 }
2466 job->out_fence = fence;
2467 }
2469 /*
2470 * Having this flag means user mode pends on event which will never
2471 * reach due to lack of at least one CRTC for signaling
2472 */
2473 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2474 return -EINVAL;
2476 return 0;
2477 }
2479 static void complete_signaling(struct drm_device *dev,
2480 struct drm_atomic_state *state,
2481 struct drm_out_fence_state *fence_state,
2482 unsigned int num_fences,
2483 bool install_fds)
2484 {
2485 struct drm_crtc *crtc;
2486 struct drm_crtc_state *crtc_state;
2487 int i;
2489 if (install_fds) {
2490 for (i = 0; i < num_fences; i++)
2491 fd_install(fence_state[i].fd,
2492 fence_state[i].sync_file->file);
2494 kfree(fence_state);
2495 return;
2496 }
2498 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2499 struct drm_pending_vblank_event *event = crtc_state->event;
2500 /*
2501 * Free the allocated event. drm_atomic_helper_setup_commit
2502 * can allocate an event too, so only free it if it's ours
2503 * to prevent a double free in drm_atomic_state_clear.
2504 */
2505 if (event && (event->base.fence || event->base.file_priv)) {
2506 drm_event_cancel_free(dev, &event->base);
2507 crtc_state->event = NULL;
2508 }
2509 }
2511 if (!fence_state)
2512 return;
2514 for (i = 0; i < num_fences; i++) {
2515 if (fence_state[i].sync_file)
2516 fput(fence_state[i].sync_file->file);
2517 if (fence_state[i].fd >= 0)
2518 put_unused_fd(fence_state[i].fd);
2520 /* If this fails log error to the user */
2521 if (fence_state[i].out_fence_ptr &&
2522 put_user(-1, fence_state[i].out_fence_ptr))
2523 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2524 }
2526 kfree(fence_state);
2527 }
2529 int drm_mode_atomic_ioctl(struct drm_device *dev,
2530 void *data, struct drm_file *file_priv)
2531 {
2532 struct drm_mode_atomic *arg = data;
2533 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2534 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2535 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2536 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2537 unsigned int copied_objs, copied_props;
2538 struct drm_atomic_state *state;
2539 struct drm_modeset_acquire_ctx ctx;
2540 struct drm_out_fence_state *fence_state;
2541 int ret = 0;
2542 unsigned int i, j, num_fences;
2544 /* disallow for drivers not supporting atomic: */
2545 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2546 return -EINVAL;
2548 /* disallow for userspace that has not enabled atomic cap (even
2549 * though this may be a bit overkill, since legacy userspace
2550 * wouldn't know how to call this ioctl)
2551 */
2552 if (!file_priv->atomic)
2553 return -EINVAL;
2555 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2556 return -EINVAL;
2558 if (arg->reserved)
2559 return -EINVAL;
2561 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2562 !dev->mode_config.async_page_flip)
2563 return -EINVAL;
2565 /* can't test and expect an event at the same time. */
2566 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2567 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2568 return -EINVAL;
2570 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2572 state = drm_atomic_state_alloc(dev);
2573 if (!state)
2574 return -ENOMEM;
2576 state->acquire_ctx = &ctx;
2577 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2579 retry:
2580 copied_objs = 0;
2581 copied_props = 0;
2582 fence_state = NULL;
2583 num_fences = 0;
2585 for (i = 0; i < arg->count_objs; i++) {
2586 uint32_t obj_id, count_props;
2587 struct drm_mode_object *obj;
2589 if (get_user(obj_id, objs_ptr + copied_objs)) {
2590 ret = -EFAULT;
2591 goto out;
2592 }
2594 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2595 if (!obj) {
2596 ret = -ENOENT;
2597 goto out;
2598 }
2600 if (!obj->properties) {
2601 drm_mode_object_put(obj);
2602 ret = -ENOENT;
2603 goto out;
2604 }
2606 if (get_user(count_props, count_props_ptr + copied_objs)) {
2607 drm_mode_object_put(obj);
2608 ret = -EFAULT;
2609 goto out;
2610 }
2612 copied_objs++;
2614 for (j = 0; j < count_props; j++) {
2615 uint32_t prop_id;
2616 uint64_t prop_value;
2617 struct drm_property *prop;
2619 if (get_user(prop_id, props_ptr + copied_props)) {
2620 drm_mode_object_put(obj);
2621 ret = -EFAULT;
2622 goto out;
2623 }
2625 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2626 if (!prop) {
2627 drm_mode_object_put(obj);
2628 ret = -ENOENT;
2629 goto out;
2630 }
2632 if (copy_from_user(&prop_value,
2633 prop_values_ptr + copied_props,
2634 sizeof(prop_value))) {
2635 drm_mode_object_put(obj);
2636 ret = -EFAULT;
2637 goto out;
2638 }
2640 ret = drm_atomic_set_property(state, obj, prop,
2641 prop_value);
2642 if (ret) {
2643 drm_mode_object_put(obj);
2644 goto out;
2645 }
2647 copied_props++;
2648 }
2650 drm_mode_object_put(obj);
2651 }
2653 ret = prepare_signaling(dev, state, arg, file_priv, &fence_state,
2654 &num_fences);
2655 if (ret)
2656 goto out;
2658 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2659 ret = drm_atomic_check_only(state);
2660 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2661 ret = drm_atomic_nonblocking_commit(state);
2662 } else {
2663 if (unlikely(drm_debug & DRM_UT_STATE))
2664 drm_atomic_print_state(state);
2666 ret = drm_atomic_commit(state);
2667 }
2669 out:
2670 complete_signaling(dev, state, fence_state, num_fences, !ret);
2672 if (ret == -EDEADLK) {
2673 drm_atomic_state_clear(state);
2674 ret = drm_modeset_backoff(&ctx);
2675 if (!ret)
2676 goto retry;
2677 }
2679 drm_atomic_state_put(state);
2681 drm_modeset_drop_locks(&ctx);
2682 drm_modeset_acquire_fini(&ctx);
2684 return ret;
2685 }