2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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.
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
30 #include <drm/drm_atomic.h>
31 #include <drm/drm_mode.h>
32 #include <drm/drm_print.h>
33 #include <linux/sync_file.h>
35 #include "drm_crtc_internal.h"
36 #include "drm_internal.h"
38 void __drm_crtc_commit_free(struct kref *kref)
40 struct drm_crtc_commit *commit =
41 container_of(kref, struct drm_crtc_commit, ref);
45 EXPORT_SYMBOL(__drm_crtc_commit_free);
48 * drm_atomic_state_default_release -
49 * release memory initialized by drm_atomic_state_init
50 * @state: atomic state
52 * Free all the memory allocated by drm_atomic_state_init.
53 * This should only be used by drivers which are still subclassing
54 * &drm_atomic_state and haven't switched to &drm_private_state yet.
56 void drm_atomic_state_default_release(struct drm_atomic_state *state)
58 kfree(state->connectors);
61 kfree(state->private_objs);
63 EXPORT_SYMBOL(drm_atomic_state_default_release);
66 * drm_atomic_state_init - init new atomic state
68 * @state: atomic state
70 * Default implementation for filling in a new atomic state.
71 * This should only be used by drivers which are still subclassing
72 * &drm_atomic_state and haven't switched to &drm_private_state yet.
75 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
77 kref_init(&state->ref);
79 /* TODO legacy paths should maybe do a better job about
80 * setting this appropriately?
82 state->allow_modeset = true;
84 state->crtcs = kcalloc(dev->mode_config.num_crtc,
85 sizeof(*state->crtcs), GFP_KERNEL);
88 state->planes = kcalloc(dev->mode_config.num_total_plane,
89 sizeof(*state->planes), GFP_KERNEL);
95 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
99 drm_atomic_state_default_release(state);
102 EXPORT_SYMBOL(drm_atomic_state_init);
105 * drm_atomic_state_alloc - allocate atomic state
108 * This allocates an empty atomic state to track updates.
110 struct drm_atomic_state *
111 drm_atomic_state_alloc(struct drm_device *dev)
113 struct drm_mode_config *config = &dev->mode_config;
115 if (!config->funcs->atomic_state_alloc) {
116 struct drm_atomic_state *state;
118 state = kzalloc(sizeof(*state), GFP_KERNEL);
121 if (drm_atomic_state_init(dev, state) < 0) {
128 return config->funcs->atomic_state_alloc(dev);
130 EXPORT_SYMBOL(drm_atomic_state_alloc);
133 * drm_atomic_state_default_clear - clear base atomic state
134 * @state: atomic state
136 * Default implementation for clearing atomic state.
137 * This should only be used by drivers which are still subclassing
138 * &drm_atomic_state and haven't switched to &drm_private_state yet.
140 void drm_atomic_state_default_clear(struct drm_atomic_state *state)
142 struct drm_device *dev = state->dev;
143 struct drm_mode_config *config = &dev->mode_config;
146 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
148 for (i = 0; i < state->num_connector; i++) {
149 struct drm_connector *connector = state->connectors[i].ptr;
154 connector->funcs->atomic_destroy_state(connector,
155 state->connectors[i].state);
156 state->connectors[i].ptr = NULL;
157 state->connectors[i].state = NULL;
158 state->connectors[i].old_state = NULL;
159 state->connectors[i].new_state = NULL;
160 drm_connector_put(connector);
163 for (i = 0; i < config->num_crtc; i++) {
164 struct drm_crtc *crtc = state->crtcs[i].ptr;
169 crtc->funcs->atomic_destroy_state(crtc,
170 state->crtcs[i].state);
172 state->crtcs[i].ptr = NULL;
173 state->crtcs[i].state = NULL;
174 state->crtcs[i].old_state = NULL;
175 state->crtcs[i].new_state = NULL;
178 for (i = 0; i < config->num_total_plane; i++) {
179 struct drm_plane *plane = state->planes[i].ptr;
184 plane->funcs->atomic_destroy_state(plane,
185 state->planes[i].state);
186 state->planes[i].ptr = NULL;
187 state->planes[i].state = NULL;
188 state->planes[i].old_state = NULL;
189 state->planes[i].new_state = NULL;
192 for (i = 0; i < state->num_private_objs; i++) {
193 struct drm_private_obj *obj = state->private_objs[i].ptr;
195 obj->funcs->atomic_destroy_state(obj,
196 state->private_objs[i].state);
197 state->private_objs[i].ptr = NULL;
198 state->private_objs[i].state = NULL;
199 state->private_objs[i].old_state = NULL;
200 state->private_objs[i].new_state = NULL;
202 state->num_private_objs = 0;
204 if (state->fake_commit) {
205 drm_crtc_commit_put(state->fake_commit);
206 state->fake_commit = NULL;
209 EXPORT_SYMBOL(drm_atomic_state_default_clear);
212 * drm_atomic_state_clear - clear state object
213 * @state: atomic state
215 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
216 * all locks. So someone else could sneak in and change the current modeset
217 * configuration. Which means that all the state assembled in @state is no
218 * longer an atomic update to the current state, but to some arbitrary earlier
219 * state. Which could break assumptions the driver's
220 * &drm_mode_config_funcs.atomic_check likely relies on.
222 * Hence we must clear all cached state and completely start over, using this
225 void drm_atomic_state_clear(struct drm_atomic_state *state)
227 struct drm_device *dev = state->dev;
228 struct drm_mode_config *config = &dev->mode_config;
230 if (config->funcs->atomic_state_clear)
231 config->funcs->atomic_state_clear(state);
233 drm_atomic_state_default_clear(state);
235 EXPORT_SYMBOL(drm_atomic_state_clear);
238 * __drm_atomic_state_free - free all memory for an atomic state
239 * @ref: This atomic state to deallocate
241 * This frees all memory associated with an atomic state, including all the
242 * per-object state for planes, crtcs and connectors.
244 void __drm_atomic_state_free(struct kref *ref)
246 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
247 struct drm_mode_config *config = &state->dev->mode_config;
249 drm_atomic_state_clear(state);
251 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
253 if (config->funcs->atomic_state_free) {
254 config->funcs->atomic_state_free(state);
256 drm_atomic_state_default_release(state);
260 EXPORT_SYMBOL(__drm_atomic_state_free);
263 * drm_atomic_get_crtc_state - get crtc state
264 * @state: global atomic state object
265 * @crtc: crtc to get state object for
267 * This function returns the crtc state for the given crtc, allocating it if
268 * needed. It will also grab the relevant crtc lock to make sure that the state
273 * Either the allocated state or the error code encoded into the pointer. When
274 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
275 * entire atomic sequence must be restarted. All other errors are fatal.
277 struct drm_crtc_state *
278 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
279 struct drm_crtc *crtc)
281 int ret, index = drm_crtc_index(crtc);
282 struct drm_crtc_state *crtc_state;
284 WARN_ON(!state->acquire_ctx);
286 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
290 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
294 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
296 return ERR_PTR(-ENOMEM);
298 state->crtcs[index].state = crtc_state;
299 state->crtcs[index].old_state = crtc->state;
300 state->crtcs[index].new_state = crtc_state;
301 state->crtcs[index].ptr = crtc;
302 crtc_state->state = state;
304 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
305 crtc->base.id, crtc->name, crtc_state, state);
309 EXPORT_SYMBOL(drm_atomic_get_crtc_state);
311 static void set_out_fence_for_crtc(struct drm_atomic_state *state,
312 struct drm_crtc *crtc, s32 __user *fence_ptr)
314 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
317 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
318 struct drm_crtc *crtc)
320 s32 __user *fence_ptr;
322 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
323 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
329 * drm_atomic_set_mode_for_crtc - set mode for CRTC
330 * @state: the CRTC whose incoming state to update
331 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
333 * Set a mode (originating from the kernel) on the desired CRTC state and update
334 * the enable property.
337 * Zero on success, error code on failure. Cannot return -EDEADLK.
339 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
340 const struct drm_display_mode *mode)
342 struct drm_mode_modeinfo umode;
344 /* Early return for no change. */
345 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
348 drm_property_blob_put(state->mode_blob);
349 state->mode_blob = NULL;
352 drm_mode_convert_to_umode(&umode, mode);
354 drm_property_create_blob(state->crtc->dev,
357 if (IS_ERR(state->mode_blob))
358 return PTR_ERR(state->mode_blob);
360 drm_mode_copy(&state->mode, mode);
361 state->enable = true;
362 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
365 memset(&state->mode, 0, sizeof(state->mode));
366 state->enable = false;
367 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
373 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
376 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
377 * @state: the CRTC whose incoming state to update
378 * @blob: pointer to blob property to use for mode
380 * Set a mode (originating from a blob property) on the desired CRTC state.
381 * This function will take a reference on the blob property for the CRTC state,
382 * and release the reference held on the state's existing mode property, if any
386 * Zero on success, error code on failure. Cannot return -EDEADLK.
388 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
389 struct drm_property_blob *blob)
391 if (blob == state->mode_blob)
394 drm_property_blob_put(state->mode_blob);
395 state->mode_blob = NULL;
397 memset(&state->mode, 0, sizeof(state->mode));
400 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
401 drm_mode_convert_umode(state->crtc->dev, &state->mode,
405 state->mode_blob = drm_property_blob_get(blob);
406 state->enable = true;
407 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
408 state->mode.name, state);
410 state->enable = false;
411 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
417 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
420 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
422 * @blob: a pointer to the member blob to be replaced
423 * @blob_id: ID of the new blob
424 * @expected_size: total expected size of the blob data (in bytes)
425 * @expected_elem_size: expected element size of the blob data (in bytes)
426 * @replaced: did the blob get replaced?
428 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
429 * @blob becomes NULL.
431 * If @expected_size is positive the new blob length is expected to be equal
432 * to @expected_size bytes. If @expected_elem_size is positive the new blob
433 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
434 * an error is returned.
436 * @replaced will indicate to the caller whether the blob was replaced or not.
437 * If the old and new blobs were in fact the same blob @replaced will be false
438 * otherwise it will be true.
441 * Zero on success, error code on failure.
444 drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
445 struct drm_property_blob **blob,
447 ssize_t expected_size,
448 ssize_t expected_elem_size,
451 struct drm_property_blob *new_blob = NULL;
454 new_blob = drm_property_lookup_blob(dev, blob_id);
455 if (new_blob == NULL)
458 if (expected_size > 0 &&
459 new_blob->length != expected_size) {
460 drm_property_blob_put(new_blob);
463 if (expected_elem_size > 0 &&
464 new_blob->length % expected_elem_size != 0) {
465 drm_property_blob_put(new_blob);
470 *replaced |= drm_property_replace_blob(blob, new_blob);
471 drm_property_blob_put(new_blob);
477 * drm_atomic_crtc_set_property - set property on CRTC
478 * @crtc: the drm CRTC to set a property on
479 * @state: the state object to update with the new property value
480 * @property: the property to set
481 * @val: the new property value
483 * This function handles generic/core properties and calls out to driver's
484 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
485 * consistent behavior you must call this function rather than the driver hook
489 * Zero on success, error code on failure
491 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
492 struct drm_crtc_state *state, struct drm_property *property,
495 struct drm_device *dev = crtc->dev;
496 struct drm_mode_config *config = &dev->mode_config;
497 bool replaced = false;
500 if (property == config->prop_active)
502 else if (property == config->prop_mode_id) {
503 struct drm_property_blob *mode =
504 drm_property_lookup_blob(dev, val);
505 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
506 drm_property_blob_put(mode);
508 } else if (property == config->degamma_lut_property) {
509 ret = drm_atomic_replace_property_blob_from_id(dev,
512 -1, sizeof(struct drm_color_lut),
514 state->color_mgmt_changed |= replaced;
516 } else if (property == config->ctm_property) {
517 ret = drm_atomic_replace_property_blob_from_id(dev,
520 sizeof(struct drm_color_ctm), -1,
522 state->color_mgmt_changed |= replaced;
524 } else if (property == config->gamma_lut_property) {
525 ret = drm_atomic_replace_property_blob_from_id(dev,
528 -1, sizeof(struct drm_color_lut),
530 state->color_mgmt_changed |= replaced;
532 } else if (property == config->prop_out_fence_ptr) {
533 s32 __user *fence_ptr = u64_to_user_ptr(val);
538 if (put_user(-1, fence_ptr))
541 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
542 } else if (crtc->funcs->atomic_set_property)
543 return crtc->funcs->atomic_set_property(crtc, state, property, val);
549 EXPORT_SYMBOL(drm_atomic_crtc_set_property);
552 * drm_atomic_crtc_get_property - get property value from CRTC state
553 * @crtc: the drm CRTC to set a property on
554 * @state: the state object to get the property value from
555 * @property: the property to set
556 * @val: return location for the property value
558 * This function handles generic/core properties and calls out to driver's
559 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
560 * consistent behavior you must call this function rather than the driver hook
564 * Zero on success, error code on failure
567 drm_atomic_crtc_get_property(struct drm_crtc *crtc,
568 const struct drm_crtc_state *state,
569 struct drm_property *property, uint64_t *val)
571 struct drm_device *dev = crtc->dev;
572 struct drm_mode_config *config = &dev->mode_config;
574 if (property == config->prop_active)
575 *val = state->active;
576 else if (property == config->prop_mode_id)
577 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
578 else if (property == config->degamma_lut_property)
579 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
580 else if (property == config->ctm_property)
581 *val = (state->ctm) ? state->ctm->base.id : 0;
582 else if (property == config->gamma_lut_property)
583 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
584 else if (property == config->prop_out_fence_ptr)
586 else if (crtc->funcs->atomic_get_property)
587 return crtc->funcs->atomic_get_property(crtc, state, property, val);
595 * drm_atomic_crtc_check - check crtc state
596 * @crtc: crtc to check
597 * @state: crtc state to check
599 * Provides core sanity checks for crtc state.
602 * Zero on success, error code on failure
604 static int drm_atomic_crtc_check(struct drm_crtc *crtc,
605 struct drm_crtc_state *state)
607 /* NOTE: we explicitly don't enforce constraints such as primary
608 * layer covering entire screen, since that is something we want
609 * to allow (on hw that supports it). For hw that does not, it
610 * should be checked in driver's crtc->atomic_check() vfunc.
612 * TODO: Add generic modeset state checks once we support those.
615 if (state->active && !state->enable) {
616 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
617 crtc->base.id, crtc->name);
621 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
622 * as this is a kernel-internal detail that userspace should never
623 * be able to trigger. */
624 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
625 WARN_ON(state->enable && !state->mode_blob)) {
626 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
627 crtc->base.id, crtc->name);
631 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
632 WARN_ON(!state->enable && state->mode_blob)) {
633 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
634 crtc->base.id, crtc->name);
639 * Reject event generation for when a CRTC is off and stays off.
640 * It wouldn't be hard to implement this, but userspace has a track
641 * record of happily burning through 100% cpu (or worse, crash) when the
642 * display pipe is suspended. To avoid all that fun just reject updates
643 * that ask for events since likely that indicates a bug in the
644 * compositor's drawing loop. This is consistent with the vblank IOCTL
645 * and legacy page_flip IOCTL which also reject service on a disabled
648 if (state->event && !state->active && !crtc->state->active) {
649 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
650 crtc->base.id, crtc->name);
657 static void drm_atomic_crtc_print_state(struct drm_printer *p,
658 const struct drm_crtc_state *state)
660 struct drm_crtc *crtc = state->crtc;
662 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
663 drm_printf(p, "\tenable=%d\n", state->enable);
664 drm_printf(p, "\tactive=%d\n", state->active);
665 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
666 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
667 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
668 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
669 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
670 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
671 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
672 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
673 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
675 if (crtc->funcs->atomic_print_state)
676 crtc->funcs->atomic_print_state(p, state);
680 * drm_atomic_get_plane_state - get plane state
681 * @state: global atomic state object
682 * @plane: plane to get state object for
684 * This function returns the plane state for the given plane, allocating it if
685 * needed. It will also grab the relevant plane lock to make sure that the state
690 * Either the allocated state or the error code encoded into the pointer. When
691 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
692 * entire atomic sequence must be restarted. All other errors are fatal.
694 struct drm_plane_state *
695 drm_atomic_get_plane_state(struct drm_atomic_state *state,
696 struct drm_plane *plane)
698 int ret, index = drm_plane_index(plane);
699 struct drm_plane_state *plane_state;
701 WARN_ON(!state->acquire_ctx);
703 plane_state = drm_atomic_get_existing_plane_state(state, plane);
707 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
711 plane_state = plane->funcs->atomic_duplicate_state(plane);
713 return ERR_PTR(-ENOMEM);
715 state->planes[index].state = plane_state;
716 state->planes[index].ptr = plane;
717 state->planes[index].old_state = plane->state;
718 state->planes[index].new_state = plane_state;
719 plane_state->state = state;
721 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
722 plane->base.id, plane->name, plane_state, state);
724 if (plane_state->crtc) {
725 struct drm_crtc_state *crtc_state;
727 crtc_state = drm_atomic_get_crtc_state(state,
729 if (IS_ERR(crtc_state))
730 return ERR_CAST(crtc_state);
735 EXPORT_SYMBOL(drm_atomic_get_plane_state);
738 * drm_atomic_plane_set_property - set property on plane
739 * @plane: the drm plane to set a property on
740 * @state: the state object to update with the new property value
741 * @property: the property to set
742 * @val: the new property value
744 * This function handles generic/core properties and calls out to driver's
745 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
746 * consistent behavior you must call this function rather than the driver hook
750 * Zero on success, error code on failure
752 static int drm_atomic_plane_set_property(struct drm_plane *plane,
753 struct drm_plane_state *state, struct drm_property *property,
756 struct drm_device *dev = plane->dev;
757 struct drm_mode_config *config = &dev->mode_config;
759 if (property == config->prop_fb_id) {
760 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
761 drm_atomic_set_fb_for_plane(state, fb);
763 drm_framebuffer_put(fb);
764 } else if (property == config->prop_in_fence_fd) {
768 if (U642I64(val) == -1)
771 state->fence = sync_file_get_fence(val);
775 } else if (property == config->prop_crtc_id) {
776 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
777 return drm_atomic_set_crtc_for_plane(state, crtc);
778 } else if (property == config->prop_crtc_x) {
779 state->crtc_x = U642I64(val);
780 } else if (property == config->prop_crtc_y) {
781 state->crtc_y = U642I64(val);
782 } else if (property == config->prop_crtc_w) {
784 } else if (property == config->prop_crtc_h) {
786 } else if (property == config->prop_src_x) {
788 } else if (property == config->prop_src_y) {
790 } else if (property == config->prop_src_w) {
792 } else if (property == config->prop_src_h) {
794 } else if (property == plane->rotation_property) {
795 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK))
797 state->rotation = val;
798 } else if (property == plane->zpos_property) {
800 } else if (property == plane->color_encoding_property) {
801 state->color_encoding = val;
802 } else if (property == plane->color_range_property) {
803 state->color_range = val;
804 } else if (plane->funcs->atomic_set_property) {
805 return plane->funcs->atomic_set_property(plane, state,
815 * drm_atomic_plane_get_property - get property value from plane state
816 * @plane: the drm plane to set a property on
817 * @state: the state object to get the property value from
818 * @property: the property to set
819 * @val: return location for the property value
821 * This function handles generic/core properties and calls out to driver's
822 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
823 * consistent behavior you must call this function rather than the driver hook
827 * Zero on success, error code on failure
830 drm_atomic_plane_get_property(struct drm_plane *plane,
831 const struct drm_plane_state *state,
832 struct drm_property *property, uint64_t *val)
834 struct drm_device *dev = plane->dev;
835 struct drm_mode_config *config = &dev->mode_config;
837 if (property == config->prop_fb_id) {
838 *val = (state->fb) ? state->fb->base.id : 0;
839 } else if (property == config->prop_in_fence_fd) {
841 } else if (property == config->prop_crtc_id) {
842 *val = (state->crtc) ? state->crtc->base.id : 0;
843 } else if (property == config->prop_crtc_x) {
844 *val = I642U64(state->crtc_x);
845 } else if (property == config->prop_crtc_y) {
846 *val = I642U64(state->crtc_y);
847 } else if (property == config->prop_crtc_w) {
848 *val = state->crtc_w;
849 } else if (property == config->prop_crtc_h) {
850 *val = state->crtc_h;
851 } else if (property == config->prop_src_x) {
853 } else if (property == config->prop_src_y) {
855 } else if (property == config->prop_src_w) {
857 } else if (property == config->prop_src_h) {
859 } else if (property == plane->rotation_property) {
860 *val = state->rotation;
861 } else if (property == plane->zpos_property) {
863 } else if (property == plane->color_encoding_property) {
864 *val = state->color_encoding;
865 } else if (property == plane->color_range_property) {
866 *val = state->color_range;
867 } else if (plane->funcs->atomic_get_property) {
868 return plane->funcs->atomic_get_property(plane, state, property, val);
877 plane_switching_crtc(struct drm_atomic_state *state,
878 struct drm_plane *plane,
879 struct drm_plane_state *plane_state)
881 if (!plane->state->crtc || !plane_state->crtc)
884 if (plane->state->crtc == plane_state->crtc)
887 /* This could be refined, but currently there's no helper or driver code
888 * to implement direct switching of active planes nor userspace to take
889 * advantage of more direct plane switching without the intermediate
896 * drm_atomic_plane_check - check plane state
897 * @plane: plane to check
898 * @state: plane state to check
900 * Provides core sanity checks for plane state.
903 * Zero on success, error code on failure
905 static int drm_atomic_plane_check(struct drm_plane *plane,
906 struct drm_plane_state *state)
908 unsigned int fb_width, fb_height;
911 /* either *both* CRTC and FB must be set, or neither */
912 if (state->crtc && !state->fb) {
913 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
915 } else if (state->fb && !state->crtc) {
916 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
920 /* if disabled, we don't care about the rest of the state: */
924 /* Check whether this plane is usable on this CRTC */
925 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
926 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
930 /* Check whether this plane supports the fb pixel format. */
931 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
932 state->fb->modifier);
934 struct drm_format_name_buf format_name;
935 DRM_DEBUG_ATOMIC("Invalid pixel format %s, modifier 0x%llx\n",
936 drm_get_format_name(state->fb->format->format,
938 state->fb->modifier);
942 /* Give drivers some help against integer overflows */
943 if (state->crtc_w > INT_MAX ||
944 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
945 state->crtc_h > INT_MAX ||
946 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
947 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
948 state->crtc_w, state->crtc_h,
949 state->crtc_x, state->crtc_y);
953 fb_width = state->fb->width << 16;
954 fb_height = state->fb->height << 16;
956 /* Make sure source coordinates are inside the fb. */
957 if (state->src_w > fb_width ||
958 state->src_x > fb_width - state->src_w ||
959 state->src_h > fb_height ||
960 state->src_y > fb_height - state->src_h) {
961 DRM_DEBUG_ATOMIC("Invalid source coordinates "
962 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
963 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
964 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
965 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
966 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
967 state->fb->width, state->fb->height);
971 if (plane_switching_crtc(state->state, plane, state)) {
972 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
973 plane->base.id, plane->name);
980 static void drm_atomic_plane_print_state(struct drm_printer *p,
981 const struct drm_plane_state *state)
983 struct drm_plane *plane = state->plane;
984 struct drm_rect src = drm_plane_state_src(state);
985 struct drm_rect dest = drm_plane_state_dest(state);
987 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
988 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
989 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
991 drm_framebuffer_print_info(p, 2, state->fb);
992 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
993 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
994 drm_printf(p, "\trotation=%x\n", state->rotation);
995 drm_printf(p, "\tcolor-encoding=%s\n",
996 drm_get_color_encoding_name(state->color_encoding));
997 drm_printf(p, "\tcolor-range=%s\n",
998 drm_get_color_range_name(state->color_range));
1000 if (plane->funcs->atomic_print_state)
1001 plane->funcs->atomic_print_state(p, state);
1005 * DOC: handling driver private state
1007 * Very often the DRM objects exposed to userspace in the atomic modeset api
1008 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1009 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1010 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1011 * planes or CRTCs, and so on) it makes sense to model these as independent
1012 * objects. Drivers then need to do similar state tracking and commit ordering for
1013 * such private (since not exposed to userpace) objects as the atomic core and
1014 * helpers already provide for connectors, planes and CRTCs.
1016 * To make this easier on drivers the atomic core provides some support to track
1017 * driver private state objects using struct &drm_private_obj, with the
1018 * associated state struct &drm_private_state.
1020 * Similar to userspace-exposed objects, private state structures can be
1021 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1022 * does not take care of locking, drivers should wrap it for each type of
1023 * private state object they have with the required call to drm_modeset_lock()
1024 * for the corresponding &drm_modeset_lock.
1026 * All private state structures contained in a &drm_atomic_state update can be
1027 * iterated using for_each_oldnew_private_obj_in_state(),
1028 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1029 * Drivers are recommended to wrap these for each type of driver private state
1030 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1031 * least if they want to iterate over all objects of a given type.
1033 * An earlier way to handle driver private state was by subclassing struct
1034 * &drm_atomic_state. But since that encourages non-standard ways to implement
1035 * the check/commit split atomic requires (by using e.g. "check and rollback or
1036 * commit instead" of "duplicate state, check, then either commit or release
1037 * duplicated state) it is deprecated in favour of using &drm_private_state.
1041 * drm_atomic_private_obj_init - initialize private object
1042 * @obj: private object
1043 * @state: initial private object state
1044 * @funcs: pointer to the struct of function pointers that identify the object
1047 * Initialize the private object, which can be embedded into any
1048 * driver private object that needs its own atomic state.
1051 drm_atomic_private_obj_init(struct drm_private_obj *obj,
1052 struct drm_private_state *state,
1053 const struct drm_private_state_funcs *funcs)
1055 memset(obj, 0, sizeof(*obj));
1060 EXPORT_SYMBOL(drm_atomic_private_obj_init);
1063 * drm_atomic_private_obj_fini - finalize private object
1064 * @obj: private object
1066 * Finalize the private object.
1069 drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1071 obj->funcs->atomic_destroy_state(obj, obj->state);
1073 EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1076 * drm_atomic_get_private_obj_state - get private object state
1077 * @state: global atomic state
1078 * @obj: private object to get the state for
1080 * This function returns the private object state for the given private object,
1081 * allocating the state if needed. It does not grab any locks as the caller is
1082 * expected to care of any required locking.
1086 * Either the allocated state or the error code encoded into a pointer.
1088 struct drm_private_state *
1089 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1090 struct drm_private_obj *obj)
1092 int index, num_objs, i;
1094 struct __drm_private_objs_state *arr;
1095 struct drm_private_state *obj_state;
1097 for (i = 0; i < state->num_private_objs; i++)
1098 if (obj == state->private_objs[i].ptr)
1099 return state->private_objs[i].state;
1101 num_objs = state->num_private_objs + 1;
1102 size = sizeof(*state->private_objs) * num_objs;
1103 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1105 return ERR_PTR(-ENOMEM);
1107 state->private_objs = arr;
1108 index = state->num_private_objs;
1109 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1111 obj_state = obj->funcs->atomic_duplicate_state(obj);
1113 return ERR_PTR(-ENOMEM);
1115 state->private_objs[index].state = obj_state;
1116 state->private_objs[index].old_state = obj->state;
1117 state->private_objs[index].new_state = obj_state;
1118 state->private_objs[index].ptr = obj;
1120 state->num_private_objs = num_objs;
1122 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1123 obj, obj_state, state);
1127 EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1130 * drm_atomic_get_connector_state - get connector state
1131 * @state: global atomic state object
1132 * @connector: connector to get state object for
1134 * This function returns the connector state for the given connector,
1135 * allocating it if needed. It will also grab the relevant connector lock to
1136 * make sure that the state is consistent.
1140 * Either the allocated state or the error code encoded into the pointer. When
1141 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1142 * entire atomic sequence must be restarted. All other errors are fatal.
1144 struct drm_connector_state *
1145 drm_atomic_get_connector_state(struct drm_atomic_state *state,
1146 struct drm_connector *connector)
1149 struct drm_mode_config *config = &connector->dev->mode_config;
1150 struct drm_connector_state *connector_state;
1152 WARN_ON(!state->acquire_ctx);
1154 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1156 return ERR_PTR(ret);
1158 index = drm_connector_index(connector);
1160 if (index >= state->num_connector) {
1161 struct __drm_connnectors_state *c;
1162 int alloc = max(index + 1, config->num_connector);
1164 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1166 return ERR_PTR(-ENOMEM);
1168 state->connectors = c;
1169 memset(&state->connectors[state->num_connector], 0,
1170 sizeof(*state->connectors) * (alloc - state->num_connector));
1172 state->num_connector = alloc;
1175 if (state->connectors[index].state)
1176 return state->connectors[index].state;
1178 connector_state = connector->funcs->atomic_duplicate_state(connector);
1179 if (!connector_state)
1180 return ERR_PTR(-ENOMEM);
1182 drm_connector_get(connector);
1183 state->connectors[index].state = connector_state;
1184 state->connectors[index].old_state = connector->state;
1185 state->connectors[index].new_state = connector_state;
1186 state->connectors[index].ptr = connector;
1187 connector_state->state = state;
1189 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1190 connector->base.id, connector->name,
1191 connector_state, state);
1193 if (connector_state->crtc) {
1194 struct drm_crtc_state *crtc_state;
1196 crtc_state = drm_atomic_get_crtc_state(state,
1197 connector_state->crtc);
1198 if (IS_ERR(crtc_state))
1199 return ERR_CAST(crtc_state);
1202 return connector_state;
1204 EXPORT_SYMBOL(drm_atomic_get_connector_state);
1207 * drm_atomic_connector_set_property - set property on connector.
1208 * @connector: the drm connector to set a property on
1209 * @state: the state object to update with the new property value
1210 * @property: the property to set
1211 * @val: the new property value
1213 * This function handles generic/core properties and calls out to driver's
1214 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1215 * consistent behavior you must call this function rather than the driver hook
1219 * Zero on success, error code on failure
1221 static int drm_atomic_connector_set_property(struct drm_connector *connector,
1222 struct drm_connector_state *state, struct drm_property *property,
1225 struct drm_device *dev = connector->dev;
1226 struct drm_mode_config *config = &dev->mode_config;
1228 if (property == config->prop_crtc_id) {
1229 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1230 return drm_atomic_set_crtc_for_connector(state, crtc);
1231 } else if (property == config->dpms_property) {
1232 /* setting DPMS property requires special handling, which
1233 * is done in legacy setprop path for us. Disallow (for
1234 * now?) atomic writes to DPMS property:
1237 } else if (property == config->tv_select_subconnector_property) {
1238 state->tv.subconnector = val;
1239 } else if (property == config->tv_left_margin_property) {
1240 state->tv.margins.left = val;
1241 } else if (property == config->tv_right_margin_property) {
1242 state->tv.margins.right = val;
1243 } else if (property == config->tv_top_margin_property) {
1244 state->tv.margins.top = val;
1245 } else if (property == config->tv_bottom_margin_property) {
1246 state->tv.margins.bottom = val;
1247 } else if (property == config->tv_mode_property) {
1248 state->tv.mode = val;
1249 } else if (property == config->tv_brightness_property) {
1250 state->tv.brightness = val;
1251 } else if (property == config->tv_contrast_property) {
1252 state->tv.contrast = val;
1253 } else if (property == config->tv_flicker_reduction_property) {
1254 state->tv.flicker_reduction = val;
1255 } else if (property == config->tv_overscan_property) {
1256 state->tv.overscan = val;
1257 } else if (property == config->tv_saturation_property) {
1258 state->tv.saturation = val;
1259 } else if (property == config->tv_hue_property) {
1260 state->tv.hue = val;
1261 } else if (property == config->link_status_property) {
1262 /* Never downgrade from GOOD to BAD on userspace's request here,
1263 * only hw issues can do that.
1265 * For an atomic property the userspace doesn't need to be able
1266 * to understand all the properties, but needs to be able to
1267 * restore the state it wants on VT switch. So if the userspace
1268 * tries to change the link_status from GOOD to BAD, driver
1269 * silently rejects it and returns a 0. This prevents userspace
1270 * from accidently breaking the display when it restores the
1273 if (state->link_status != DRM_LINK_STATUS_GOOD)
1274 state->link_status = val;
1275 } else if (property == config->aspect_ratio_property) {
1276 state->picture_aspect_ratio = val;
1277 } else if (property == connector->scaling_mode_property) {
1278 state->scaling_mode = val;
1279 } else if (property == connector->content_protection_property) {
1280 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1281 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1284 state->content_protection = val;
1285 } else if (connector->funcs->atomic_set_property) {
1286 return connector->funcs->atomic_set_property(connector,
1287 state, property, val);
1295 static void drm_atomic_connector_print_state(struct drm_printer *p,
1296 const struct drm_connector_state *state)
1298 struct drm_connector *connector = state->connector;
1300 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1301 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1303 if (connector->funcs->atomic_print_state)
1304 connector->funcs->atomic_print_state(p, state);
1308 * drm_atomic_connector_get_property - get property value from connector state
1309 * @connector: the drm connector to set a property on
1310 * @state: the state object to get the property value from
1311 * @property: the property to set
1312 * @val: return location for the property value
1314 * This function handles generic/core properties and calls out to driver's
1315 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1316 * consistent behavior you must call this function rather than the driver hook
1320 * Zero on success, error code on failure
1323 drm_atomic_connector_get_property(struct drm_connector *connector,
1324 const struct drm_connector_state *state,
1325 struct drm_property *property, uint64_t *val)
1327 struct drm_device *dev = connector->dev;
1328 struct drm_mode_config *config = &dev->mode_config;
1330 if (property == config->prop_crtc_id) {
1331 *val = (state->crtc) ? state->crtc->base.id : 0;
1332 } else if (property == config->dpms_property) {
1333 *val = connector->dpms;
1334 } else if (property == config->tv_select_subconnector_property) {
1335 *val = state->tv.subconnector;
1336 } else if (property == config->tv_left_margin_property) {
1337 *val = state->tv.margins.left;
1338 } else if (property == config->tv_right_margin_property) {
1339 *val = state->tv.margins.right;
1340 } else if (property == config->tv_top_margin_property) {
1341 *val = state->tv.margins.top;
1342 } else if (property == config->tv_bottom_margin_property) {
1343 *val = state->tv.margins.bottom;
1344 } else if (property == config->tv_mode_property) {
1345 *val = state->tv.mode;
1346 } else if (property == config->tv_brightness_property) {
1347 *val = state->tv.brightness;
1348 } else if (property == config->tv_contrast_property) {
1349 *val = state->tv.contrast;
1350 } else if (property == config->tv_flicker_reduction_property) {
1351 *val = state->tv.flicker_reduction;
1352 } else if (property == config->tv_overscan_property) {
1353 *val = state->tv.overscan;
1354 } else if (property == config->tv_saturation_property) {
1355 *val = state->tv.saturation;
1356 } else if (property == config->tv_hue_property) {
1357 *val = state->tv.hue;
1358 } else if (property == config->link_status_property) {
1359 *val = state->link_status;
1360 } else if (property == config->aspect_ratio_property) {
1361 *val = state->picture_aspect_ratio;
1362 } else if (property == connector->scaling_mode_property) {
1363 *val = state->scaling_mode;
1364 } else if (property == connector->content_protection_property) {
1365 *val = state->content_protection;
1366 } else if (connector->funcs->atomic_get_property) {
1367 return connector->funcs->atomic_get_property(connector,
1368 state, property, val);
1376 int drm_atomic_get_property(struct drm_mode_object *obj,
1377 struct drm_property *property, uint64_t *val)
1379 struct drm_device *dev = property->dev;
1382 switch (obj->type) {
1383 case DRM_MODE_OBJECT_CONNECTOR: {
1384 struct drm_connector *connector = obj_to_connector(obj);
1385 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1386 ret = drm_atomic_connector_get_property(connector,
1387 connector->state, property, val);
1390 case DRM_MODE_OBJECT_CRTC: {
1391 struct drm_crtc *crtc = obj_to_crtc(obj);
1392 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1393 ret = drm_atomic_crtc_get_property(crtc,
1394 crtc->state, property, val);
1397 case DRM_MODE_OBJECT_PLANE: {
1398 struct drm_plane *plane = obj_to_plane(obj);
1399 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1400 ret = drm_atomic_plane_get_property(plane,
1401 plane->state, property, val);
1413 * drm_atomic_set_crtc_for_plane - set crtc for plane
1414 * @plane_state: the plane whose incoming state to update
1415 * @crtc: crtc to use for the plane
1417 * Changing the assigned crtc for a plane requires us to grab the lock and state
1418 * for the new crtc, as needed. This function takes care of all these details
1419 * besides updating the pointer in the state object itself.
1422 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1423 * then the w/w mutex code has detected a deadlock and the entire atomic
1424 * sequence must be restarted. All other errors are fatal.
1427 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1428 struct drm_crtc *crtc)
1430 struct drm_plane *plane = plane_state->plane;
1431 struct drm_crtc_state *crtc_state;
1433 if (plane_state->crtc) {
1434 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1436 if (WARN_ON(IS_ERR(crtc_state)))
1437 return PTR_ERR(crtc_state);
1439 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1442 plane_state->crtc = crtc;
1445 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1447 if (IS_ERR(crtc_state))
1448 return PTR_ERR(crtc_state);
1449 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1453 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1454 plane_state, crtc->base.id, crtc->name);
1456 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1461 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1464 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1465 * @plane_state: atomic state object for the plane
1466 * @fb: fb to use for the plane
1468 * Changing the assigned framebuffer for a plane requires us to grab a reference
1469 * to the new fb and drop the reference to the old fb, if there is one. This
1470 * function takes care of all these details besides updating the pointer in the
1471 * state object itself.
1474 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1475 struct drm_framebuffer *fb)
1478 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1479 fb->base.id, plane_state);
1481 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1484 drm_framebuffer_assign(&plane_state->fb, fb);
1486 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1489 * drm_atomic_set_fence_for_plane - set fence for plane
1490 * @plane_state: atomic state object for the plane
1491 * @fence: dma_fence to use for the plane
1493 * Helper to setup the plane_state fence in case it is not set yet.
1494 * By using this drivers doesn't need to worry if the user choose
1495 * implicit or explicit fencing.
1497 * This function will not set the fence to the state if it was set
1498 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1499 * drop the reference to the fence as we are not storing it anywhere.
1500 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1501 * with the received implicit fence. In both cases this function consumes a
1502 * reference for @fence.
1505 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1506 struct dma_fence *fence)
1508 if (plane_state->fence) {
1509 dma_fence_put(fence);
1513 plane_state->fence = fence;
1515 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1518 * drm_atomic_set_crtc_for_connector - set crtc for connector
1519 * @conn_state: atomic state object for the connector
1520 * @crtc: crtc to use for the connector
1522 * Changing the assigned crtc for a connector requires us to grab the lock and
1523 * state for the new crtc, as needed. This function takes care of all these
1524 * details besides updating the pointer in the state object itself.
1527 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1528 * then the w/w mutex code has detected a deadlock and the entire atomic
1529 * sequence must be restarted. All other errors are fatal.
1532 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1533 struct drm_crtc *crtc)
1535 struct drm_crtc_state *crtc_state;
1537 if (conn_state->crtc == crtc)
1540 if (conn_state->crtc) {
1541 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1544 crtc_state->connector_mask &=
1545 ~(1 << drm_connector_index(conn_state->connector));
1547 drm_connector_put(conn_state->connector);
1548 conn_state->crtc = NULL;
1552 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1553 if (IS_ERR(crtc_state))
1554 return PTR_ERR(crtc_state);
1556 crtc_state->connector_mask |=
1557 1 << drm_connector_index(conn_state->connector);
1559 drm_connector_get(conn_state->connector);
1560 conn_state->crtc = crtc;
1562 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1563 conn_state, crtc->base.id, crtc->name);
1565 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1571 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1574 * drm_atomic_add_affected_connectors - add connectors for crtc
1575 * @state: atomic state
1578 * This function walks the current configuration and adds all connectors
1579 * currently using @crtc to the atomic configuration @state. Note that this
1580 * function must acquire the connection mutex. This can potentially cause
1581 * unneeded seralization if the update is just for the planes on one crtc. Hence
1582 * drivers and helpers should only call this when really needed (e.g. when a
1583 * full modeset needs to happen due to some change).
1586 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1587 * then the w/w mutex code has detected a deadlock and the entire atomic
1588 * sequence must be restarted. All other errors are fatal.
1591 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1592 struct drm_crtc *crtc)
1594 struct drm_mode_config *config = &state->dev->mode_config;
1595 struct drm_connector *connector;
1596 struct drm_connector_state *conn_state;
1597 struct drm_connector_list_iter conn_iter;
1598 struct drm_crtc_state *crtc_state;
1601 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1602 if (IS_ERR(crtc_state))
1603 return PTR_ERR(crtc_state);
1605 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1609 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1610 crtc->base.id, crtc->name, state);
1613 * Changed connectors are already in @state, so only need to look
1614 * at the connector_mask in crtc_state.
1616 drm_connector_list_iter_begin(state->dev, &conn_iter);
1617 drm_for_each_connector_iter(connector, &conn_iter) {
1618 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector))))
1621 conn_state = drm_atomic_get_connector_state(state, connector);
1622 if (IS_ERR(conn_state)) {
1623 drm_connector_list_iter_end(&conn_iter);
1624 return PTR_ERR(conn_state);
1627 drm_connector_list_iter_end(&conn_iter);
1631 EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1634 * drm_atomic_add_affected_planes - add planes for crtc
1635 * @state: atomic state
1638 * This function walks the current configuration and adds all planes
1639 * currently used by @crtc to the atomic configuration @state. This is useful
1640 * when an atomic commit also needs to check all currently enabled plane on
1641 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1642 * to avoid special code to force-enable all planes.
1644 * Since acquiring a plane state will always also acquire the w/w mutex of the
1645 * current CRTC for that plane (if there is any) adding all the plane states for
1646 * a CRTC will not reduce parallism of atomic updates.
1649 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1650 * then the w/w mutex code has detected a deadlock and the entire atomic
1651 * sequence must be restarted. All other errors are fatal.
1654 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1655 struct drm_crtc *crtc)
1657 struct drm_plane *plane;
1659 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1661 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1662 struct drm_plane_state *plane_state =
1663 drm_atomic_get_plane_state(state, plane);
1665 if (IS_ERR(plane_state))
1666 return PTR_ERR(plane_state);
1670 EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1673 * drm_atomic_check_only - check whether a given config would work
1674 * @state: atomic configuration to check
1676 * Note that this function can return -EDEADLK if the driver needed to acquire
1677 * more locks but encountered a deadlock. The caller must then do the usual w/w
1678 * backoff dance and restart. All other errors are fatal.
1681 * 0 on success, negative error code on failure.
1683 int drm_atomic_check_only(struct drm_atomic_state *state)
1685 struct drm_device *dev = state->dev;
1686 struct drm_mode_config *config = &dev->mode_config;
1687 struct drm_plane *plane;
1688 struct drm_plane_state *plane_state;
1689 struct drm_crtc *crtc;
1690 struct drm_crtc_state *crtc_state;
1693 DRM_DEBUG_ATOMIC("checking %p\n", state);
1695 for_each_new_plane_in_state(state, plane, plane_state, i) {
1696 ret = drm_atomic_plane_check(plane, plane_state);
1698 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1699 plane->base.id, plane->name);
1704 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1705 ret = drm_atomic_crtc_check(crtc, crtc_state);
1707 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1708 crtc->base.id, crtc->name);
1713 if (config->funcs->atomic_check)
1714 ret = config->funcs->atomic_check(state->dev, state);
1719 if (!state->allow_modeset) {
1720 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1721 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1722 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1723 crtc->base.id, crtc->name);
1731 EXPORT_SYMBOL(drm_atomic_check_only);
1734 * drm_atomic_commit - commit configuration atomically
1735 * @state: atomic configuration to check
1737 * Note that this function can return -EDEADLK if the driver needed to acquire
1738 * more locks but encountered a deadlock. The caller must then do the usual w/w
1739 * backoff dance and restart. All other errors are fatal.
1741 * This function will take its own reference on @state.
1742 * Callers should always release their reference with drm_atomic_state_put().
1745 * 0 on success, negative error code on failure.
1747 int drm_atomic_commit(struct drm_atomic_state *state)
1749 struct drm_mode_config *config = &state->dev->mode_config;
1752 ret = drm_atomic_check_only(state);
1756 DRM_DEBUG_ATOMIC("committing %p\n", state);
1758 return config->funcs->atomic_commit(state->dev, state, false);
1760 EXPORT_SYMBOL(drm_atomic_commit);
1763 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1764 * @state: atomic configuration to check
1766 * Note that this function can return -EDEADLK if the driver needed to acquire
1767 * more locks but encountered a deadlock. The caller must then do the usual w/w
1768 * backoff dance and restart. All other errors are fatal.
1770 * This function will take its own reference on @state.
1771 * Callers should always release their reference with drm_atomic_state_put().
1774 * 0 on success, negative error code on failure.
1776 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1778 struct drm_mode_config *config = &state->dev->mode_config;
1781 ret = drm_atomic_check_only(state);
1785 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1787 return config->funcs->atomic_commit(state->dev, state, true);
1789 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1791 static void drm_atomic_print_state(const struct drm_atomic_state *state)
1793 struct drm_printer p = drm_info_printer(state->dev->dev);
1794 struct drm_plane *plane;
1795 struct drm_plane_state *plane_state;
1796 struct drm_crtc *crtc;
1797 struct drm_crtc_state *crtc_state;
1798 struct drm_connector *connector;
1799 struct drm_connector_state *connector_state;
1802 DRM_DEBUG_ATOMIC("checking %p\n", state);
1804 for_each_new_plane_in_state(state, plane, plane_state, i)
1805 drm_atomic_plane_print_state(&p, plane_state);
1807 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1808 drm_atomic_crtc_print_state(&p, crtc_state);
1810 for_each_new_connector_in_state(state, connector, connector_state, i)
1811 drm_atomic_connector_print_state(&p, connector_state);
1814 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1817 struct drm_mode_config *config = &dev->mode_config;
1818 struct drm_plane *plane;
1819 struct drm_crtc *crtc;
1820 struct drm_connector *connector;
1821 struct drm_connector_list_iter conn_iter;
1823 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1826 list_for_each_entry(plane, &config->plane_list, head) {
1828 drm_modeset_lock(&plane->mutex, NULL);
1829 drm_atomic_plane_print_state(p, plane->state);
1831 drm_modeset_unlock(&plane->mutex);
1834 list_for_each_entry(crtc, &config->crtc_list, head) {
1836 drm_modeset_lock(&crtc->mutex, NULL);
1837 drm_atomic_crtc_print_state(p, crtc->state);
1839 drm_modeset_unlock(&crtc->mutex);
1842 drm_connector_list_iter_begin(dev, &conn_iter);
1844 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1845 drm_for_each_connector_iter(connector, &conn_iter)
1846 drm_atomic_connector_print_state(p, connector->state);
1848 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1849 drm_connector_list_iter_end(&conn_iter);
1853 * drm_state_dump - dump entire device atomic state
1854 * @dev: the drm device
1855 * @p: where to print the state to
1857 * Just for debugging. Drivers might want an option to dump state
1858 * to dmesg in case of error irq's. (Hint, you probably want to
1861 * The caller must drm_modeset_lock_all(), or if this is called
1862 * from error irq handler, it should not be enabled by default.
1863 * (Ie. if you are debugging errors you might not care that this
1864 * is racey. But calling this without all modeset locks held is
1865 * not inherently safe.)
1867 void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1869 __drm_state_dump(dev, p, false);
1871 EXPORT_SYMBOL(drm_state_dump);
1873 #ifdef CONFIG_DEBUG_FS
1874 static int drm_state_info(struct seq_file *m, void *data)
1876 struct drm_info_node *node = (struct drm_info_node *) m->private;
1877 struct drm_device *dev = node->minor->dev;
1878 struct drm_printer p = drm_seq_file_printer(m);
1880 __drm_state_dump(dev, &p, true);
1885 /* any use in debugfs files to dump individual planes/crtc/etc? */
1886 static const struct drm_info_list drm_atomic_debugfs_list[] = {
1887 {"state", drm_state_info, 0},
1890 int drm_atomic_debugfs_init(struct drm_minor *minor)
1892 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1893 ARRAY_SIZE(drm_atomic_debugfs_list),
1894 minor->debugfs_root, minor);
1899 * The big monster ioctl
1902 static struct drm_pending_vblank_event *create_vblank_event(
1903 struct drm_crtc *crtc, uint64_t user_data)
1905 struct drm_pending_vblank_event *e = NULL;
1907 e = kzalloc(sizeof *e, GFP_KERNEL);
1911 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1912 e->event.base.length = sizeof(e->event);
1913 e->event.vbl.crtc_id = crtc->base.id;
1914 e->event.vbl.user_data = user_data;
1919 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
1920 struct drm_connector *connector,
1923 struct drm_connector *tmp_connector;
1924 struct drm_connector_state *new_conn_state;
1925 struct drm_crtc *crtc;
1926 struct drm_crtc_state *crtc_state;
1927 int i, ret, old_mode = connector->dpms;
1928 bool active = false;
1930 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
1931 state->acquire_ctx);
1935 if (mode != DRM_MODE_DPMS_ON)
1936 mode = DRM_MODE_DPMS_OFF;
1937 connector->dpms = mode;
1939 crtc = connector->state->crtc;
1942 ret = drm_atomic_add_affected_connectors(state, crtc);
1946 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1947 if (IS_ERR(crtc_state)) {
1948 ret = PTR_ERR(crtc_state);
1952 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
1953 if (new_conn_state->crtc != crtc)
1955 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
1961 crtc_state->active = active;
1962 ret = drm_atomic_commit(state);
1965 connector->dpms = old_mode;
1969 int drm_atomic_set_property(struct drm_atomic_state *state,
1970 struct drm_mode_object *obj,
1971 struct drm_property *prop,
1972 uint64_t prop_value)
1974 struct drm_mode_object *ref;
1977 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1980 switch (obj->type) {
1981 case DRM_MODE_OBJECT_CONNECTOR: {
1982 struct drm_connector *connector = obj_to_connector(obj);
1983 struct drm_connector_state *connector_state;
1985 connector_state = drm_atomic_get_connector_state(state, connector);
1986 if (IS_ERR(connector_state)) {
1987 ret = PTR_ERR(connector_state);
1991 ret = drm_atomic_connector_set_property(connector,
1992 connector_state, prop, prop_value);
1995 case DRM_MODE_OBJECT_CRTC: {
1996 struct drm_crtc *crtc = obj_to_crtc(obj);
1997 struct drm_crtc_state *crtc_state;
1999 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2000 if (IS_ERR(crtc_state)) {
2001 ret = PTR_ERR(crtc_state);
2005 ret = drm_atomic_crtc_set_property(crtc,
2006 crtc_state, prop, prop_value);
2009 case DRM_MODE_OBJECT_PLANE: {
2010 struct drm_plane *plane = obj_to_plane(obj);
2011 struct drm_plane_state *plane_state;
2013 plane_state = drm_atomic_get_plane_state(state, plane);
2014 if (IS_ERR(plane_state)) {
2015 ret = PTR_ERR(plane_state);
2019 ret = drm_atomic_plane_set_property(plane,
2020 plane_state, prop, prop_value);
2028 drm_property_change_valid_put(prop, ref);
2033 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
2035 * @dev: drm device to check.
2036 * @plane_mask: plane mask for planes that were updated.
2037 * @ret: return value, can be -EDEADLK for a retry.
2039 * Before doing an update &drm_plane.old_fb is set to &drm_plane.fb, but before
2040 * dropping the locks old_fb needs to be set to NULL and plane->fb updated. This
2041 * is a common operation for each atomic update, so this call is split off as a
2044 void drm_atomic_clean_old_fb(struct drm_device *dev,
2045 unsigned plane_mask,
2048 struct drm_plane *plane;
2050 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
2051 * locks (ie. while it is still safe to deref plane->state). We
2052 * need to do this here because the driver entry points cannot
2053 * distinguish between legacy and atomic ioctls.
2055 drm_for_each_plane_mask(plane, dev, plane_mask) {
2057 struct drm_framebuffer *new_fb = plane->state->fb;
2059 drm_framebuffer_get(new_fb);
2061 plane->crtc = plane->state->crtc;
2064 drm_framebuffer_put(plane->old_fb);
2066 plane->old_fb = NULL;
2069 EXPORT_SYMBOL(drm_atomic_clean_old_fb);
2072 * DOC: explicit fencing properties
2074 * Explicit fencing allows userspace to control the buffer synchronization
2075 * between devices. A Fence or a group of fences are transfered to/from
2076 * userspace using Sync File fds and there are two DRM properties for that.
2077 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2078 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2080 * As a contrast, with implicit fencing the kernel keeps track of any
2081 * ongoing rendering, and automatically ensures that the atomic update waits
2082 * for any pending rendering to complete. For shared buffers represented with
2083 * a &struct dma_buf this is tracked in &struct reservation_object.
2084 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2085 * whereas explicit fencing is what Android wants.
2088 * Use this property to pass a fence that DRM should wait on before
2089 * proceeding with the Atomic Commit request and show the framebuffer for
2090 * the plane on the screen. The fence can be either a normal fence or a
2091 * merged one, the sync_file framework will handle both cases and use a
2092 * fence_array if a merged fence is received. Passing -1 here means no
2093 * fences to wait on.
2095 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2096 * it will only check if the Sync File is a valid one.
2098 * On the driver side the fence is stored on the @fence parameter of
2099 * &struct drm_plane_state. Drivers which also support implicit fencing
2100 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2101 * to make sure there's consistent behaviour between drivers in precedence
2102 * of implicit vs. explicit fencing.
2105 * Use this property to pass a file descriptor pointer to DRM. Once the
2106 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2107 * the file descriptor number of a Sync File. This Sync File contains the
2108 * CRTC fence that will be signaled when all framebuffers present on the
2109 * Atomic Commit * request for that given CRTC are scanned out on the
2112 * The Atomic Commit request fails if a invalid pointer is passed. If the
2113 * Atomic Commit request fails for any other reason the out fence fd
2114 * returned will be -1. On a Atomic Commit with the
2115 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2117 * Note that out-fences don't have a special interface to drivers and are
2118 * internally represented by a &struct drm_pending_vblank_event in struct
2119 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2120 * helpers and for the DRM event handling for existing userspace.
2123 struct drm_out_fence_state {
2124 s32 __user *out_fence_ptr;
2125 struct sync_file *sync_file;
2129 static int setup_out_fence(struct drm_out_fence_state *fence_state,
2130 struct dma_fence *fence)
2132 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2133 if (fence_state->fd < 0)
2134 return fence_state->fd;
2136 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2139 fence_state->sync_file = sync_file_create(fence);
2140 if (!fence_state->sync_file)
2146 static int prepare_crtc_signaling(struct drm_device *dev,
2147 struct drm_atomic_state *state,
2148 struct drm_mode_atomic *arg,
2149 struct drm_file *file_priv,
2150 struct drm_out_fence_state **fence_state,
2151 unsigned int *num_fences)
2153 struct drm_crtc *crtc;
2154 struct drm_crtc_state *crtc_state;
2157 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2160 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2161 s32 __user *fence_ptr;
2163 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2165 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2166 struct drm_pending_vblank_event *e;
2168 e = create_vblank_event(crtc, arg->user_data);
2172 crtc_state->event = e;
2175 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2176 struct drm_pending_vblank_event *e = crtc_state->event;
2181 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2185 crtc_state->event = NULL;
2191 struct dma_fence *fence;
2192 struct drm_out_fence_state *f;
2194 f = krealloc(*fence_state, sizeof(**fence_state) *
2195 (*num_fences + 1), GFP_KERNEL);
2199 memset(&f[*num_fences], 0, sizeof(*f));
2201 f[*num_fences].out_fence_ptr = fence_ptr;
2204 fence = drm_crtc_create_fence(crtc);
2208 ret = setup_out_fence(&f[(*num_fences)++], fence);
2210 dma_fence_put(fence);
2214 crtc_state->event->base.fence = fence;
2221 * Having this flag means user mode pends on event which will never
2222 * reach due to lack of at least one CRTC for signaling
2224 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2230 static void complete_crtc_signaling(struct drm_device *dev,
2231 struct drm_atomic_state *state,
2232 struct drm_out_fence_state *fence_state,
2233 unsigned int num_fences,
2236 struct drm_crtc *crtc;
2237 struct drm_crtc_state *crtc_state;
2241 for (i = 0; i < num_fences; i++)
2242 fd_install(fence_state[i].fd,
2243 fence_state[i].sync_file->file);
2249 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2250 struct drm_pending_vblank_event *event = crtc_state->event;
2252 * Free the allocated event. drm_atomic_helper_setup_commit
2253 * can allocate an event too, so only free it if it's ours
2254 * to prevent a double free in drm_atomic_state_clear.
2256 if (event && (event->base.fence || event->base.file_priv)) {
2257 drm_event_cancel_free(dev, &event->base);
2258 crtc_state->event = NULL;
2265 for (i = 0; i < num_fences; i++) {
2266 if (fence_state[i].sync_file)
2267 fput(fence_state[i].sync_file->file);
2268 if (fence_state[i].fd >= 0)
2269 put_unused_fd(fence_state[i].fd);
2271 /* If this fails log error to the user */
2272 if (fence_state[i].out_fence_ptr &&
2273 put_user(-1, fence_state[i].out_fence_ptr))
2274 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2280 int drm_mode_atomic_ioctl(struct drm_device *dev,
2281 void *data, struct drm_file *file_priv)
2283 struct drm_mode_atomic *arg = data;
2284 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2285 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2286 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2287 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2288 unsigned int copied_objs, copied_props;
2289 struct drm_atomic_state *state;
2290 struct drm_modeset_acquire_ctx ctx;
2291 struct drm_plane *plane;
2292 struct drm_out_fence_state *fence_state;
2293 unsigned plane_mask;
2295 unsigned int i, j, num_fences;
2297 /* disallow for drivers not supporting atomic: */
2298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2301 /* disallow for userspace that has not enabled atomic cap (even
2302 * though this may be a bit overkill, since legacy userspace
2303 * wouldn't know how to call this ioctl)
2305 if (!file_priv->atomic)
2308 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2314 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2315 !dev->mode_config.async_page_flip)
2318 /* can't test and expect an event at the same time. */
2319 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2320 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2323 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2325 state = drm_atomic_state_alloc(dev);
2329 state->acquire_ctx = &ctx;
2330 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2339 for (i = 0; i < arg->count_objs; i++) {
2340 uint32_t obj_id, count_props;
2341 struct drm_mode_object *obj;
2343 if (get_user(obj_id, objs_ptr + copied_objs)) {
2348 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2354 if (!obj->properties) {
2355 drm_mode_object_put(obj);
2360 if (get_user(count_props, count_props_ptr + copied_objs)) {
2361 drm_mode_object_put(obj);
2368 for (j = 0; j < count_props; j++) {
2370 uint64_t prop_value;
2371 struct drm_property *prop;
2373 if (get_user(prop_id, props_ptr + copied_props)) {
2374 drm_mode_object_put(obj);
2379 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2381 drm_mode_object_put(obj);
2386 if (copy_from_user(&prop_value,
2387 prop_values_ptr + copied_props,
2388 sizeof(prop_value))) {
2389 drm_mode_object_put(obj);
2394 ret = drm_atomic_set_property(state, obj, prop,
2397 drm_mode_object_put(obj);
2404 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
2405 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
2406 plane = obj_to_plane(obj);
2407 plane_mask |= (1 << drm_plane_index(plane));
2408 plane->old_fb = plane->fb;
2410 drm_mode_object_put(obj);
2413 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
2418 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2419 ret = drm_atomic_check_only(state);
2420 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2421 ret = drm_atomic_nonblocking_commit(state);
2423 if (unlikely(drm_debug & DRM_UT_STATE))
2424 drm_atomic_print_state(state);
2426 ret = drm_atomic_commit(state);
2430 drm_atomic_clean_old_fb(dev, plane_mask, ret);
2432 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
2434 if (ret == -EDEADLK) {
2435 drm_atomic_state_clear(state);
2436 ret = drm_modeset_backoff(&ctx);
2441 drm_atomic_state_put(state);
2443 drm_modeset_drop_locks(&ctx);
2444 drm_modeset_acquire_fini(&ctx);