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 drm_connector_put(connector);
161 for (i = 0; i < config->num_crtc; i++) {
162 struct drm_crtc *crtc = state->crtcs[i].ptr;
167 crtc->funcs->atomic_destroy_state(crtc,
168 state->crtcs[i].state);
170 state->crtcs[i].ptr = NULL;
171 state->crtcs[i].state = NULL;
174 for (i = 0; i < config->num_total_plane; i++) {
175 struct drm_plane *plane = state->planes[i].ptr;
180 plane->funcs->atomic_destroy_state(plane,
181 state->planes[i].state);
182 state->planes[i].ptr = NULL;
183 state->planes[i].state = NULL;
186 for (i = 0; i < state->num_private_objs; i++) {
187 struct drm_private_obj *obj = state->private_objs[i].ptr;
189 obj->funcs->atomic_destroy_state(obj,
190 state->private_objs[i].state);
191 state->private_objs[i].ptr = NULL;
192 state->private_objs[i].state = NULL;
194 state->num_private_objs = 0;
196 if (state->fake_commit) {
197 drm_crtc_commit_put(state->fake_commit);
198 state->fake_commit = NULL;
201 EXPORT_SYMBOL(drm_atomic_state_default_clear);
204 * drm_atomic_state_clear - clear state object
205 * @state: atomic state
207 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
208 * all locks. So someone else could sneak in and change the current modeset
209 * configuration. Which means that all the state assembled in @state is no
210 * longer an atomic update to the current state, but to some arbitrary earlier
211 * state. Which could break assumptions the driver's
212 * &drm_mode_config_funcs.atomic_check likely relies on.
214 * Hence we must clear all cached state and completely start over, using this
217 void drm_atomic_state_clear(struct drm_atomic_state *state)
219 struct drm_device *dev = state->dev;
220 struct drm_mode_config *config = &dev->mode_config;
222 if (config->funcs->atomic_state_clear)
223 config->funcs->atomic_state_clear(state);
225 drm_atomic_state_default_clear(state);
227 EXPORT_SYMBOL(drm_atomic_state_clear);
230 * __drm_atomic_state_free - free all memory for an atomic state
231 * @ref: This atomic state to deallocate
233 * This frees all memory associated with an atomic state, including all the
234 * per-object state for planes, crtcs and connectors.
236 void __drm_atomic_state_free(struct kref *ref)
238 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
239 struct drm_mode_config *config = &state->dev->mode_config;
241 drm_atomic_state_clear(state);
243 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
245 if (config->funcs->atomic_state_free) {
246 config->funcs->atomic_state_free(state);
248 drm_atomic_state_default_release(state);
252 EXPORT_SYMBOL(__drm_atomic_state_free);
255 * drm_atomic_get_crtc_state - get crtc state
256 * @state: global atomic state object
257 * @crtc: crtc to get state object for
259 * This function returns the crtc state for the given crtc, allocating it if
260 * needed. It will also grab the relevant crtc lock to make sure that the state
265 * Either the allocated state or the error code encoded into the pointer. When
266 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
267 * entire atomic sequence must be restarted. All other errors are fatal.
269 struct drm_crtc_state *
270 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
271 struct drm_crtc *crtc)
273 int ret, index = drm_crtc_index(crtc);
274 struct drm_crtc_state *crtc_state;
276 WARN_ON(!state->acquire_ctx);
278 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
282 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
286 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
288 return ERR_PTR(-ENOMEM);
290 state->crtcs[index].state = crtc_state;
291 state->crtcs[index].old_state = crtc->state;
292 state->crtcs[index].new_state = crtc_state;
293 state->crtcs[index].ptr = crtc;
294 crtc_state->state = state;
296 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
297 crtc->base.id, crtc->name, crtc_state, state);
301 EXPORT_SYMBOL(drm_atomic_get_crtc_state);
303 static void set_out_fence_for_crtc(struct drm_atomic_state *state,
304 struct drm_crtc *crtc, s32 __user *fence_ptr)
306 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
309 static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
310 struct drm_crtc *crtc)
312 s32 __user *fence_ptr;
314 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
315 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
321 * drm_atomic_set_mode_for_crtc - set mode for CRTC
322 * @state: the CRTC whose incoming state to update
323 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
325 * Set a mode (originating from the kernel) on the desired CRTC state and update
326 * the enable property.
329 * Zero on success, error code on failure. Cannot return -EDEADLK.
331 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
332 const struct drm_display_mode *mode)
334 struct drm_mode_modeinfo umode;
336 /* Early return for no change. */
337 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
340 drm_property_blob_put(state->mode_blob);
341 state->mode_blob = NULL;
344 drm_mode_convert_to_umode(&umode, mode);
346 drm_property_create_blob(state->crtc->dev,
349 if (IS_ERR(state->mode_blob))
350 return PTR_ERR(state->mode_blob);
352 drm_mode_copy(&state->mode, mode);
353 state->enable = true;
354 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
357 memset(&state->mode, 0, sizeof(state->mode));
358 state->enable = false;
359 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
365 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
368 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
369 * @state: the CRTC whose incoming state to update
370 * @blob: pointer to blob property to use for mode
372 * Set a mode (originating from a blob property) on the desired CRTC state.
373 * This function will take a reference on the blob property for the CRTC state,
374 * and release the reference held on the state's existing mode property, if any
378 * Zero on success, error code on failure. Cannot return -EDEADLK.
380 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
381 struct drm_property_blob *blob)
383 if (blob == state->mode_blob)
386 drm_property_blob_put(state->mode_blob);
387 state->mode_blob = NULL;
389 memset(&state->mode, 0, sizeof(state->mode));
392 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
393 drm_mode_convert_umode(state->crtc->dev, &state->mode,
397 state->mode_blob = drm_property_blob_get(blob);
398 state->enable = true;
399 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
400 state->mode.name, state);
402 state->enable = false;
403 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
409 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
412 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
414 * @blob: a pointer to the member blob to be replaced
415 * @blob_id: ID of the new blob
416 * @expected_size: total expected size of the blob data (in bytes)
417 * @expected_elem_size: expected element size of the blob data (in bytes)
418 * @replaced: did the blob get replaced?
420 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
421 * @blob becomes NULL.
423 * If @expected_size is positive the new blob length is expected to be equal
424 * to @expected_size bytes. If @expected_elem_size is positive the new blob
425 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
426 * an error is returned.
428 * @replaced will indicate to the caller whether the blob was replaced or not.
429 * If the old and new blobs were in fact the same blob @replaced will be false
430 * otherwise it will be true.
433 * Zero on success, error code on failure.
436 drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
437 struct drm_property_blob **blob,
439 ssize_t expected_size,
440 ssize_t expected_elem_size,
443 struct drm_property_blob *new_blob = NULL;
446 new_blob = drm_property_lookup_blob(dev, blob_id);
447 if (new_blob == NULL)
450 if (expected_size > 0 &&
451 new_blob->length != expected_size) {
452 drm_property_blob_put(new_blob);
455 if (expected_elem_size > 0 &&
456 new_blob->length % expected_elem_size != 0) {
457 drm_property_blob_put(new_blob);
462 *replaced |= drm_property_replace_blob(blob, new_blob);
463 drm_property_blob_put(new_blob);
469 * drm_atomic_crtc_set_property - set property on CRTC
470 * @crtc: the drm CRTC to set a property on
471 * @state: the state object to update with the new property value
472 * @property: the property to set
473 * @val: the new property value
475 * This function handles generic/core properties and calls out to driver's
476 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
477 * consistent behavior you must call this function rather than the driver hook
481 * Zero on success, error code on failure
483 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
484 struct drm_crtc_state *state, struct drm_property *property,
487 struct drm_device *dev = crtc->dev;
488 struct drm_mode_config *config = &dev->mode_config;
489 bool replaced = false;
492 if (property == config->prop_active)
494 else if (property == config->prop_mode_id) {
495 struct drm_property_blob *mode =
496 drm_property_lookup_blob(dev, val);
497 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
498 drm_property_blob_put(mode);
500 } else if (property == config->degamma_lut_property) {
501 ret = drm_atomic_replace_property_blob_from_id(dev,
504 -1, sizeof(struct drm_color_lut),
506 state->color_mgmt_changed |= replaced;
508 } else if (property == config->ctm_property) {
509 ret = drm_atomic_replace_property_blob_from_id(dev,
512 sizeof(struct drm_color_ctm), -1,
514 state->color_mgmt_changed |= replaced;
516 } else if (property == config->gamma_lut_property) {
517 ret = drm_atomic_replace_property_blob_from_id(dev,
520 -1, sizeof(struct drm_color_lut),
522 state->color_mgmt_changed |= replaced;
524 } else if (property == config->prop_out_fence_ptr) {
525 s32 __user *fence_ptr = u64_to_user_ptr(val);
530 if (put_user(-1, fence_ptr))
533 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
534 } else if (crtc->funcs->atomic_set_property)
535 return crtc->funcs->atomic_set_property(crtc, state, property, val);
541 EXPORT_SYMBOL(drm_atomic_crtc_set_property);
544 * drm_atomic_crtc_get_property - get property value from CRTC state
545 * @crtc: the drm CRTC to set a property on
546 * @state: the state object to get the property value from
547 * @property: the property to set
548 * @val: return location for the property value
550 * This function handles generic/core properties and calls out to driver's
551 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
552 * consistent behavior you must call this function rather than the driver hook
556 * Zero on success, error code on failure
559 drm_atomic_crtc_get_property(struct drm_crtc *crtc,
560 const struct drm_crtc_state *state,
561 struct drm_property *property, uint64_t *val)
563 struct drm_device *dev = crtc->dev;
564 struct drm_mode_config *config = &dev->mode_config;
566 if (property == config->prop_active)
567 *val = state->active;
568 else if (property == config->prop_mode_id)
569 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
570 else if (property == config->degamma_lut_property)
571 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
572 else if (property == config->ctm_property)
573 *val = (state->ctm) ? state->ctm->base.id : 0;
574 else if (property == config->gamma_lut_property)
575 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
576 else if (property == config->prop_out_fence_ptr)
578 else if (crtc->funcs->atomic_get_property)
579 return crtc->funcs->atomic_get_property(crtc, state, property, val);
587 * drm_atomic_crtc_check - check crtc state
588 * @crtc: crtc to check
589 * @state: crtc state to check
591 * Provides core sanity checks for crtc state.
594 * Zero on success, error code on failure
596 static int drm_atomic_crtc_check(struct drm_crtc *crtc,
597 struct drm_crtc_state *state)
599 /* NOTE: we explicitly don't enforce constraints such as primary
600 * layer covering entire screen, since that is something we want
601 * to allow (on hw that supports it). For hw that does not, it
602 * should be checked in driver's crtc->atomic_check() vfunc.
604 * TODO: Add generic modeset state checks once we support those.
607 if (state->active && !state->enable) {
608 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
609 crtc->base.id, crtc->name);
613 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
614 * as this is a kernel-internal detail that userspace should never
615 * be able to trigger. */
616 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
617 WARN_ON(state->enable && !state->mode_blob)) {
618 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
619 crtc->base.id, crtc->name);
623 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
624 WARN_ON(!state->enable && state->mode_blob)) {
625 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
626 crtc->base.id, crtc->name);
631 * Reject event generation for when a CRTC is off and stays off.
632 * It wouldn't be hard to implement this, but userspace has a track
633 * record of happily burning through 100% cpu (or worse, crash) when the
634 * display pipe is suspended. To avoid all that fun just reject updates
635 * that ask for events since likely that indicates a bug in the
636 * compositor's drawing loop. This is consistent with the vblank IOCTL
637 * and legacy page_flip IOCTL which also reject service on a disabled
640 if (state->event && !state->active && !crtc->state->active) {
641 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
642 crtc->base.id, crtc->name);
649 static void drm_atomic_crtc_print_state(struct drm_printer *p,
650 const struct drm_crtc_state *state)
652 struct drm_crtc *crtc = state->crtc;
654 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
655 drm_printf(p, "\tenable=%d\n", state->enable);
656 drm_printf(p, "\tactive=%d\n", state->active);
657 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
658 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
659 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
660 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
661 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
662 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
663 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
664 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
665 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
667 if (crtc->funcs->atomic_print_state)
668 crtc->funcs->atomic_print_state(p, state);
672 * drm_atomic_get_plane_state - get plane state
673 * @state: global atomic state object
674 * @plane: plane to get state object for
676 * This function returns the plane state for the given plane, allocating it if
677 * needed. It will also grab the relevant plane lock to make sure that the state
682 * Either the allocated state or the error code encoded into the pointer. When
683 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
684 * entire atomic sequence must be restarted. All other errors are fatal.
686 struct drm_plane_state *
687 drm_atomic_get_plane_state(struct drm_atomic_state *state,
688 struct drm_plane *plane)
690 int ret, index = drm_plane_index(plane);
691 struct drm_plane_state *plane_state;
693 WARN_ON(!state->acquire_ctx);
695 /* the legacy pointers should never be set */
697 WARN_ON(plane->old_fb);
698 WARN_ON(plane->crtc);
700 plane_state = drm_atomic_get_existing_plane_state(state, plane);
704 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
708 plane_state = plane->funcs->atomic_duplicate_state(plane);
710 return ERR_PTR(-ENOMEM);
712 state->planes[index].state = plane_state;
713 state->planes[index].ptr = plane;
714 state->planes[index].old_state = plane->state;
715 state->planes[index].new_state = plane_state;
716 plane_state->state = state;
718 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
719 plane->base.id, plane->name, plane_state, state);
721 if (plane_state->crtc) {
722 struct drm_crtc_state *crtc_state;
724 crtc_state = drm_atomic_get_crtc_state(state,
726 if (IS_ERR(crtc_state))
727 return ERR_CAST(crtc_state);
732 EXPORT_SYMBOL(drm_atomic_get_plane_state);
735 * drm_atomic_plane_set_property - set property on plane
736 * @plane: the drm plane to set a property on
737 * @state: the state object to update with the new property value
738 * @property: the property to set
739 * @val: the new property value
741 * This function handles generic/core properties and calls out to driver's
742 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
743 * consistent behavior you must call this function rather than the driver hook
747 * Zero on success, error code on failure
749 static int drm_atomic_plane_set_property(struct drm_plane *plane,
750 struct drm_plane_state *state, struct drm_property *property,
753 struct drm_device *dev = plane->dev;
754 struct drm_mode_config *config = &dev->mode_config;
756 if (property == config->prop_fb_id) {
757 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
758 drm_atomic_set_fb_for_plane(state, fb);
760 drm_framebuffer_put(fb);
761 } else if (property == config->prop_in_fence_fd) {
765 if (U642I64(val) == -1)
768 state->fence = sync_file_get_fence(val);
772 } else if (property == config->prop_crtc_id) {
773 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
774 return drm_atomic_set_crtc_for_plane(state, crtc);
775 } else if (property == config->prop_crtc_x) {
776 state->crtc_x = U642I64(val);
777 } else if (property == config->prop_crtc_y) {
778 state->crtc_y = U642I64(val);
779 } else if (property == config->prop_crtc_w) {
781 } else if (property == config->prop_crtc_h) {
783 } else if (property == config->prop_src_x) {
785 } else if (property == config->prop_src_y) {
787 } else if (property == config->prop_src_w) {
789 } else if (property == config->prop_src_h) {
791 } else if (property == plane->alpha_property) {
793 } else if (property == plane->rotation_property) {
794 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK))
796 state->rotation = val;
797 } else if (property == plane->zpos_property) {
799 } else if (property == plane->color_encoding_property) {
800 state->color_encoding = val;
801 } else if (property == plane->color_range_property) {
802 state->color_range = val;
803 } else if (plane->funcs->atomic_set_property) {
804 return plane->funcs->atomic_set_property(plane, state,
814 * drm_atomic_plane_get_property - get property value from plane state
815 * @plane: the drm plane to set a property on
816 * @state: the state object to get the property value from
817 * @property: the property to set
818 * @val: return location for the property value
820 * This function handles generic/core properties and calls out to driver's
821 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
822 * consistent behavior you must call this function rather than the driver hook
826 * Zero on success, error code on failure
829 drm_atomic_plane_get_property(struct drm_plane *plane,
830 const struct drm_plane_state *state,
831 struct drm_property *property, uint64_t *val)
833 struct drm_device *dev = plane->dev;
834 struct drm_mode_config *config = &dev->mode_config;
836 if (property == config->prop_fb_id) {
837 *val = (state->fb) ? state->fb->base.id : 0;
838 } else if (property == config->prop_in_fence_fd) {
840 } else if (property == config->prop_crtc_id) {
841 *val = (state->crtc) ? state->crtc->base.id : 0;
842 } else if (property == config->prop_crtc_x) {
843 *val = I642U64(state->crtc_x);
844 } else if (property == config->prop_crtc_y) {
845 *val = I642U64(state->crtc_y);
846 } else if (property == config->prop_crtc_w) {
847 *val = state->crtc_w;
848 } else if (property == config->prop_crtc_h) {
849 *val = state->crtc_h;
850 } else if (property == config->prop_src_x) {
852 } else if (property == config->prop_src_y) {
854 } else if (property == config->prop_src_w) {
856 } else if (property == config->prop_src_h) {
858 } else if (property == plane->alpha_property) {
860 } else if (property == plane->rotation_property) {
861 *val = state->rotation;
862 } else if (property == plane->zpos_property) {
864 } else if (property == plane->color_encoding_property) {
865 *val = state->color_encoding;
866 } else if (property == plane->color_range_property) {
867 *val = state->color_range;
868 } else if (plane->funcs->atomic_get_property) {
869 return plane->funcs->atomic_get_property(plane, state, property, val);
878 plane_switching_crtc(struct drm_atomic_state *state,
879 struct drm_plane *plane,
880 struct drm_plane_state *plane_state)
882 if (!plane->state->crtc || !plane_state->crtc)
885 if (plane->state->crtc == plane_state->crtc)
888 /* This could be refined, but currently there's no helper or driver code
889 * to implement direct switching of active planes nor userspace to take
890 * advantage of more direct plane switching without the intermediate
897 * drm_atomic_plane_check - check plane state
898 * @plane: plane to check
899 * @state: plane state to check
901 * Provides core sanity checks for plane state.
904 * Zero on success, error code on failure
906 static int drm_atomic_plane_check(struct drm_plane *plane,
907 struct drm_plane_state *state)
909 unsigned int fb_width, fb_height;
912 /* either *both* CRTC and FB must be set, or neither */
913 if (state->crtc && !state->fb) {
914 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
916 } else if (state->fb && !state->crtc) {
917 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
921 /* if disabled, we don't care about the rest of the state: */
925 /* Check whether this plane is usable on this CRTC */
926 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
927 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
931 /* Check whether this plane supports the fb pixel format. */
932 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
933 state->fb->modifier);
935 struct drm_format_name_buf format_name;
936 DRM_DEBUG_ATOMIC("Invalid pixel format %s, modifier 0x%llx\n",
937 drm_get_format_name(state->fb->format->format,
939 state->fb->modifier);
943 /* Give drivers some help against integer overflows */
944 if (state->crtc_w > INT_MAX ||
945 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
946 state->crtc_h > INT_MAX ||
947 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
948 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
949 state->crtc_w, state->crtc_h,
950 state->crtc_x, state->crtc_y);
954 fb_width = state->fb->width << 16;
955 fb_height = state->fb->height << 16;
957 /* Make sure source coordinates are inside the fb. */
958 if (state->src_w > fb_width ||
959 state->src_x > fb_width - state->src_w ||
960 state->src_h > fb_height ||
961 state->src_y > fb_height - state->src_h) {
962 DRM_DEBUG_ATOMIC("Invalid source coordinates "
963 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
964 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
965 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
966 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
967 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
968 state->fb->width, state->fb->height);
972 if (plane_switching_crtc(state->state, plane, state)) {
973 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
974 plane->base.id, plane->name);
981 static void drm_atomic_plane_print_state(struct drm_printer *p,
982 const struct drm_plane_state *state)
984 struct drm_plane *plane = state->plane;
985 struct drm_rect src = drm_plane_state_src(state);
986 struct drm_rect dest = drm_plane_state_dest(state);
988 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
989 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
990 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
992 drm_framebuffer_print_info(p, 2, state->fb);
993 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
994 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
995 drm_printf(p, "\trotation=%x\n", state->rotation);
996 drm_printf(p, "\tcolor-encoding=%s\n",
997 drm_get_color_encoding_name(state->color_encoding));
998 drm_printf(p, "\tcolor-range=%s\n",
999 drm_get_color_range_name(state->color_range));
1001 if (plane->funcs->atomic_print_state)
1002 plane->funcs->atomic_print_state(p, state);
1006 * DOC: handling driver private state
1008 * Very often the DRM objects exposed to userspace in the atomic modeset api
1009 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1010 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1011 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1012 * planes or CRTCs, and so on) it makes sense to model these as independent
1013 * objects. Drivers then need to do similar state tracking and commit ordering for
1014 * such private (since not exposed to userpace) objects as the atomic core and
1015 * helpers already provide for connectors, planes and CRTCs.
1017 * To make this easier on drivers the atomic core provides some support to track
1018 * driver private state objects using struct &drm_private_obj, with the
1019 * associated state struct &drm_private_state.
1021 * Similar to userspace-exposed objects, private state structures can be
1022 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1023 * does not take care of locking, drivers should wrap it for each type of
1024 * private state object they have with the required call to drm_modeset_lock()
1025 * for the corresponding &drm_modeset_lock.
1027 * All private state structures contained in a &drm_atomic_state update can be
1028 * iterated using for_each_oldnew_private_obj_in_state(),
1029 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1030 * Drivers are recommended to wrap these for each type of driver private state
1031 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1032 * least if they want to iterate over all objects of a given type.
1034 * An earlier way to handle driver private state was by subclassing struct
1035 * &drm_atomic_state. But since that encourages non-standard ways to implement
1036 * the check/commit split atomic requires (by using e.g. "check and rollback or
1037 * commit instead" of "duplicate state, check, then either commit or release
1038 * duplicated state) it is deprecated in favour of using &drm_private_state.
1042 * drm_atomic_private_obj_init - initialize private object
1043 * @obj: private object
1044 * @state: initial private object state
1045 * @funcs: pointer to the struct of function pointers that identify the object
1048 * Initialize the private object, which can be embedded into any
1049 * driver private object that needs its own atomic state.
1052 drm_atomic_private_obj_init(struct drm_private_obj *obj,
1053 struct drm_private_state *state,
1054 const struct drm_private_state_funcs *funcs)
1056 memset(obj, 0, sizeof(*obj));
1061 EXPORT_SYMBOL(drm_atomic_private_obj_init);
1064 * drm_atomic_private_obj_fini - finalize private object
1065 * @obj: private object
1067 * Finalize the private object.
1070 drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1072 obj->funcs->atomic_destroy_state(obj, obj->state);
1074 EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1077 * drm_atomic_get_private_obj_state - get private object state
1078 * @state: global atomic state
1079 * @obj: private object to get the state for
1081 * This function returns the private object state for the given private object,
1082 * allocating the state if needed. It does not grab any locks as the caller is
1083 * expected to care of any required locking.
1087 * Either the allocated state or the error code encoded into a pointer.
1089 struct drm_private_state *
1090 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1091 struct drm_private_obj *obj)
1093 int index, num_objs, i;
1095 struct __drm_private_objs_state *arr;
1096 struct drm_private_state *obj_state;
1098 for (i = 0; i < state->num_private_objs; i++)
1099 if (obj == state->private_objs[i].ptr)
1100 return state->private_objs[i].state;
1102 num_objs = state->num_private_objs + 1;
1103 size = sizeof(*state->private_objs) * num_objs;
1104 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1106 return ERR_PTR(-ENOMEM);
1108 state->private_objs = arr;
1109 index = state->num_private_objs;
1110 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1112 obj_state = obj->funcs->atomic_duplicate_state(obj);
1114 return ERR_PTR(-ENOMEM);
1116 state->private_objs[index].state = obj_state;
1117 state->private_objs[index].old_state = obj->state;
1118 state->private_objs[index].new_state = obj_state;
1119 state->private_objs[index].ptr = obj;
1121 state->num_private_objs = num_objs;
1123 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1124 obj, obj_state, state);
1128 EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1131 * drm_atomic_get_connector_state - get connector state
1132 * @state: global atomic state object
1133 * @connector: connector to get state object for
1135 * This function returns the connector state for the given connector,
1136 * allocating it if needed. It will also grab the relevant connector lock to
1137 * make sure that the state is consistent.
1141 * Either the allocated state or the error code encoded into the pointer. When
1142 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1143 * entire atomic sequence must be restarted. All other errors are fatal.
1145 struct drm_connector_state *
1146 drm_atomic_get_connector_state(struct drm_atomic_state *state,
1147 struct drm_connector *connector)
1150 struct drm_mode_config *config = &connector->dev->mode_config;
1151 struct drm_connector_state *connector_state;
1153 WARN_ON(!state->acquire_ctx);
1155 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1157 return ERR_PTR(ret);
1159 index = drm_connector_index(connector);
1161 if (index >= state->num_connector) {
1162 struct __drm_connnectors_state *c;
1163 int alloc = max(index + 1, config->num_connector);
1165 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1167 return ERR_PTR(-ENOMEM);
1169 state->connectors = c;
1170 memset(&state->connectors[state->num_connector], 0,
1171 sizeof(*state->connectors) * (alloc - state->num_connector));
1173 state->num_connector = alloc;
1176 if (state->connectors[index].state)
1177 return state->connectors[index].state;
1179 connector_state = connector->funcs->atomic_duplicate_state(connector);
1180 if (!connector_state)
1181 return ERR_PTR(-ENOMEM);
1183 drm_connector_get(connector);
1184 state->connectors[index].state = connector_state;
1185 state->connectors[index].old_state = connector->state;
1186 state->connectors[index].new_state = connector_state;
1187 state->connectors[index].ptr = connector;
1188 connector_state->state = state;
1190 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1191 connector->base.id, connector->name,
1192 connector_state, state);
1194 if (connector_state->crtc) {
1195 struct drm_crtc_state *crtc_state;
1197 crtc_state = drm_atomic_get_crtc_state(state,
1198 connector_state->crtc);
1199 if (IS_ERR(crtc_state))
1200 return ERR_CAST(crtc_state);
1203 return connector_state;
1205 EXPORT_SYMBOL(drm_atomic_get_connector_state);
1208 * drm_atomic_connector_set_property - set property on connector.
1209 * @connector: the drm connector to set a property on
1210 * @state: the state object to update with the new property value
1211 * @property: the property to set
1212 * @val: the new property value
1214 * This function handles generic/core properties and calls out to driver's
1215 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1216 * consistent behavior you must call this function rather than the driver hook
1220 * Zero on success, error code on failure
1222 static int drm_atomic_connector_set_property(struct drm_connector *connector,
1223 struct drm_connector_state *state, struct drm_property *property,
1226 struct drm_device *dev = connector->dev;
1227 struct drm_mode_config *config = &dev->mode_config;
1229 if (property == config->prop_crtc_id) {
1230 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1231 return drm_atomic_set_crtc_for_connector(state, crtc);
1232 } else if (property == config->dpms_property) {
1233 /* setting DPMS property requires special handling, which
1234 * is done in legacy setprop path for us. Disallow (for
1235 * now?) atomic writes to DPMS property:
1238 } else if (property == config->tv_select_subconnector_property) {
1239 state->tv.subconnector = val;
1240 } else if (property == config->tv_left_margin_property) {
1241 state->tv.margins.left = val;
1242 } else if (property == config->tv_right_margin_property) {
1243 state->tv.margins.right = val;
1244 } else if (property == config->tv_top_margin_property) {
1245 state->tv.margins.top = val;
1246 } else if (property == config->tv_bottom_margin_property) {
1247 state->tv.margins.bottom = val;
1248 } else if (property == config->tv_mode_property) {
1249 state->tv.mode = val;
1250 } else if (property == config->tv_brightness_property) {
1251 state->tv.brightness = val;
1252 } else if (property == config->tv_contrast_property) {
1253 state->tv.contrast = val;
1254 } else if (property == config->tv_flicker_reduction_property) {
1255 state->tv.flicker_reduction = val;
1256 } else if (property == config->tv_overscan_property) {
1257 state->tv.overscan = val;
1258 } else if (property == config->tv_saturation_property) {
1259 state->tv.saturation = val;
1260 } else if (property == config->tv_hue_property) {
1261 state->tv.hue = val;
1262 } else if (property == config->link_status_property) {
1263 /* Never downgrade from GOOD to BAD on userspace's request here,
1264 * only hw issues can do that.
1266 * For an atomic property the userspace doesn't need to be able
1267 * to understand all the properties, but needs to be able to
1268 * restore the state it wants on VT switch. So if the userspace
1269 * tries to change the link_status from GOOD to BAD, driver
1270 * silently rejects it and returns a 0. This prevents userspace
1271 * from accidently breaking the display when it restores the
1274 if (state->link_status != DRM_LINK_STATUS_GOOD)
1275 state->link_status = val;
1276 } else if (property == config->aspect_ratio_property) {
1277 state->picture_aspect_ratio = val;
1278 } else if (property == config->content_type_property) {
1279 state->content_type = val;
1280 } else if (property == connector->scaling_mode_property) {
1281 state->scaling_mode = val;
1282 } else if (property == connector->content_protection_property) {
1283 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1284 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1287 state->content_protection = val;
1288 } else if (connector->funcs->atomic_set_property) {
1289 return connector->funcs->atomic_set_property(connector,
1290 state, property, val);
1298 static void drm_atomic_connector_print_state(struct drm_printer *p,
1299 const struct drm_connector_state *state)
1301 struct drm_connector *connector = state->connector;
1303 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1304 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1306 if (connector->funcs->atomic_print_state)
1307 connector->funcs->atomic_print_state(p, state);
1311 * drm_atomic_connector_get_property - get property value from connector state
1312 * @connector: the drm connector to set a property on
1313 * @state: the state object to get the property value from
1314 * @property: the property to set
1315 * @val: return location for the property value
1317 * This function handles generic/core properties and calls out to driver's
1318 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1319 * consistent behavior you must call this function rather than the driver hook
1323 * Zero on success, error code on failure
1326 drm_atomic_connector_get_property(struct drm_connector *connector,
1327 const struct drm_connector_state *state,
1328 struct drm_property *property, uint64_t *val)
1330 struct drm_device *dev = connector->dev;
1331 struct drm_mode_config *config = &dev->mode_config;
1333 if (property == config->prop_crtc_id) {
1334 *val = (state->crtc) ? state->crtc->base.id : 0;
1335 } else if (property == config->dpms_property) {
1336 *val = connector->dpms;
1337 } else if (property == config->tv_select_subconnector_property) {
1338 *val = state->tv.subconnector;
1339 } else if (property == config->tv_left_margin_property) {
1340 *val = state->tv.margins.left;
1341 } else if (property == config->tv_right_margin_property) {
1342 *val = state->tv.margins.right;
1343 } else if (property == config->tv_top_margin_property) {
1344 *val = state->tv.margins.top;
1345 } else if (property == config->tv_bottom_margin_property) {
1346 *val = state->tv.margins.bottom;
1347 } else if (property == config->tv_mode_property) {
1348 *val = state->tv.mode;
1349 } else if (property == config->tv_brightness_property) {
1350 *val = state->tv.brightness;
1351 } else if (property == config->tv_contrast_property) {
1352 *val = state->tv.contrast;
1353 } else if (property == config->tv_flicker_reduction_property) {
1354 *val = state->tv.flicker_reduction;
1355 } else if (property == config->tv_overscan_property) {
1356 *val = state->tv.overscan;
1357 } else if (property == config->tv_saturation_property) {
1358 *val = state->tv.saturation;
1359 } else if (property == config->tv_hue_property) {
1360 *val = state->tv.hue;
1361 } else if (property == config->link_status_property) {
1362 *val = state->link_status;
1363 } else if (property == config->aspect_ratio_property) {
1364 *val = state->picture_aspect_ratio;
1365 } else if (property == config->content_type_property) {
1366 *val = state->content_type;
1367 } else if (property == connector->scaling_mode_property) {
1368 *val = state->scaling_mode;
1369 } else if (property == connector->content_protection_property) {
1370 *val = state->content_protection;
1371 } else if (connector->funcs->atomic_get_property) {
1372 return connector->funcs->atomic_get_property(connector,
1373 state, property, val);
1381 int drm_atomic_get_property(struct drm_mode_object *obj,
1382 struct drm_property *property, uint64_t *val)
1384 struct drm_device *dev = property->dev;
1387 switch (obj->type) {
1388 case DRM_MODE_OBJECT_CONNECTOR: {
1389 struct drm_connector *connector = obj_to_connector(obj);
1390 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1391 ret = drm_atomic_connector_get_property(connector,
1392 connector->state, property, val);
1395 case DRM_MODE_OBJECT_CRTC: {
1396 struct drm_crtc *crtc = obj_to_crtc(obj);
1397 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1398 ret = drm_atomic_crtc_get_property(crtc,
1399 crtc->state, property, val);
1402 case DRM_MODE_OBJECT_PLANE: {
1403 struct drm_plane *plane = obj_to_plane(obj);
1404 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1405 ret = drm_atomic_plane_get_property(plane,
1406 plane->state, property, val);
1418 * drm_atomic_set_crtc_for_plane - set crtc for plane
1419 * @plane_state: the plane whose incoming state to update
1420 * @crtc: crtc to use for the plane
1422 * Changing the assigned crtc for a plane requires us to grab the lock and state
1423 * for the new crtc, as needed. This function takes care of all these details
1424 * besides updating the pointer in the state object itself.
1427 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1428 * then the w/w mutex code has detected a deadlock and the entire atomic
1429 * sequence must be restarted. All other errors are fatal.
1432 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1433 struct drm_crtc *crtc)
1435 struct drm_plane *plane = plane_state->plane;
1436 struct drm_crtc_state *crtc_state;
1437 /* Nothing to do for same crtc*/
1438 if (plane_state->crtc == crtc)
1440 if (plane_state->crtc) {
1441 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1443 if (WARN_ON(IS_ERR(crtc_state)))
1444 return PTR_ERR(crtc_state);
1446 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1449 plane_state->crtc = crtc;
1452 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1454 if (IS_ERR(crtc_state))
1455 return PTR_ERR(crtc_state);
1456 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1460 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1461 plane_state, crtc->base.id, crtc->name);
1463 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1468 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1471 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1472 * @plane_state: atomic state object for the plane
1473 * @fb: fb to use for the plane
1475 * Changing the assigned framebuffer for a plane requires us to grab a reference
1476 * to the new fb and drop the reference to the old fb, if there is one. This
1477 * function takes care of all these details besides updating the pointer in the
1478 * state object itself.
1481 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1482 struct drm_framebuffer *fb)
1485 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1486 fb->base.id, plane_state);
1488 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1491 drm_framebuffer_assign(&plane_state->fb, fb);
1493 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1496 * drm_atomic_set_fence_for_plane - set fence for plane
1497 * @plane_state: atomic state object for the plane
1498 * @fence: dma_fence to use for the plane
1500 * Helper to setup the plane_state fence in case it is not set yet.
1501 * By using this drivers doesn't need to worry if the user choose
1502 * implicit or explicit fencing.
1504 * This function will not set the fence to the state if it was set
1505 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1506 * drop the reference to the fence as we are not storing it anywhere.
1507 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1508 * with the received implicit fence. In both cases this function consumes a
1509 * reference for @fence.
1511 * This way explicit fencing can be used to overrule implicit fencing, which is
1512 * important to make explicit fencing use-cases work: One example is using one
1513 * buffer for 2 screens with different refresh rates. Implicit fencing will
1514 * clamp rendering to the refresh rate of the slower screen, whereas explicit
1515 * fence allows 2 independent render and display loops on a single buffer. If a
1516 * driver allows obeys both implicit and explicit fences for plane updates, then
1517 * it will break all the benefits of explicit fencing.
1520 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1521 struct dma_fence *fence)
1523 if (plane_state->fence) {
1524 dma_fence_put(fence);
1528 plane_state->fence = fence;
1530 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1533 * drm_atomic_set_crtc_for_connector - set crtc for connector
1534 * @conn_state: atomic state object for the connector
1535 * @crtc: crtc to use for the connector
1537 * Changing the assigned crtc for a connector requires us to grab the lock and
1538 * state for the new crtc, as needed. This function takes care of all these
1539 * details besides updating the pointer in the state object itself.
1542 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1543 * then the w/w mutex code has detected a deadlock and the entire atomic
1544 * sequence must be restarted. All other errors are fatal.
1547 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1548 struct drm_crtc *crtc)
1550 struct drm_crtc_state *crtc_state;
1552 if (conn_state->crtc == crtc)
1555 if (conn_state->crtc) {
1556 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1559 crtc_state->connector_mask &=
1560 ~(1 << drm_connector_index(conn_state->connector));
1562 drm_connector_put(conn_state->connector);
1563 conn_state->crtc = NULL;
1567 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1568 if (IS_ERR(crtc_state))
1569 return PTR_ERR(crtc_state);
1571 crtc_state->connector_mask |=
1572 1 << drm_connector_index(conn_state->connector);
1574 drm_connector_get(conn_state->connector);
1575 conn_state->crtc = crtc;
1577 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1578 conn_state, crtc->base.id, crtc->name);
1580 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1586 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1589 * drm_atomic_add_affected_connectors - add connectors for crtc
1590 * @state: atomic state
1593 * This function walks the current configuration and adds all connectors
1594 * currently using @crtc to the atomic configuration @state. Note that this
1595 * function must acquire the connection mutex. This can potentially cause
1596 * unneeded seralization if the update is just for the planes on one crtc. Hence
1597 * drivers and helpers should only call this when really needed (e.g. when a
1598 * full modeset needs to happen due to some change).
1601 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1602 * then the w/w mutex code has detected a deadlock and the entire atomic
1603 * sequence must be restarted. All other errors are fatal.
1606 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1607 struct drm_crtc *crtc)
1609 struct drm_mode_config *config = &state->dev->mode_config;
1610 struct drm_connector *connector;
1611 struct drm_connector_state *conn_state;
1612 struct drm_connector_list_iter conn_iter;
1613 struct drm_crtc_state *crtc_state;
1616 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1617 if (IS_ERR(crtc_state))
1618 return PTR_ERR(crtc_state);
1620 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1624 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1625 crtc->base.id, crtc->name, state);
1628 * Changed connectors are already in @state, so only need to look
1629 * at the connector_mask in crtc_state.
1631 drm_connector_list_iter_begin(state->dev, &conn_iter);
1632 drm_for_each_connector_iter(connector, &conn_iter) {
1633 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector))))
1636 conn_state = drm_atomic_get_connector_state(state, connector);
1637 if (IS_ERR(conn_state)) {
1638 drm_connector_list_iter_end(&conn_iter);
1639 return PTR_ERR(conn_state);
1642 drm_connector_list_iter_end(&conn_iter);
1646 EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1649 * drm_atomic_add_affected_planes - add planes for crtc
1650 * @state: atomic state
1653 * This function walks the current configuration and adds all planes
1654 * currently used by @crtc to the atomic configuration @state. This is useful
1655 * when an atomic commit also needs to check all currently enabled plane on
1656 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1657 * to avoid special code to force-enable all planes.
1659 * Since acquiring a plane state will always also acquire the w/w mutex of the
1660 * current CRTC for that plane (if there is any) adding all the plane states for
1661 * a CRTC will not reduce parallism of atomic updates.
1664 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1665 * then the w/w mutex code has detected a deadlock and the entire atomic
1666 * sequence must be restarted. All other errors are fatal.
1669 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1670 struct drm_crtc *crtc)
1672 struct drm_plane *plane;
1674 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1676 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1677 struct drm_plane_state *plane_state =
1678 drm_atomic_get_plane_state(state, plane);
1680 if (IS_ERR(plane_state))
1681 return PTR_ERR(plane_state);
1685 EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1688 * drm_atomic_check_only - check whether a given config would work
1689 * @state: atomic configuration to check
1691 * Note that this function can return -EDEADLK if the driver needed to acquire
1692 * more locks but encountered a deadlock. The caller must then do the usual w/w
1693 * backoff dance and restart. All other errors are fatal.
1696 * 0 on success, negative error code on failure.
1698 int drm_atomic_check_only(struct drm_atomic_state *state)
1700 struct drm_device *dev = state->dev;
1701 struct drm_mode_config *config = &dev->mode_config;
1702 struct drm_plane *plane;
1703 struct drm_plane_state *plane_state;
1704 struct drm_crtc *crtc;
1705 struct drm_crtc_state *crtc_state;
1708 DRM_DEBUG_ATOMIC("checking %p\n", state);
1710 for_each_new_plane_in_state(state, plane, plane_state, i) {
1711 ret = drm_atomic_plane_check(plane, plane_state);
1713 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1714 plane->base.id, plane->name);
1719 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1720 ret = drm_atomic_crtc_check(crtc, crtc_state);
1722 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1723 crtc->base.id, crtc->name);
1728 if (config->funcs->atomic_check)
1729 ret = config->funcs->atomic_check(state->dev, state);
1734 if (!state->allow_modeset) {
1735 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1736 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1737 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1738 crtc->base.id, crtc->name);
1746 EXPORT_SYMBOL(drm_atomic_check_only);
1749 * drm_atomic_commit - commit configuration atomically
1750 * @state: atomic configuration to check
1752 * Note that this function can return -EDEADLK if the driver needed to acquire
1753 * more locks but encountered a deadlock. The caller must then do the usual w/w
1754 * backoff dance and restart. All other errors are fatal.
1756 * This function will take its own reference on @state.
1757 * Callers should always release their reference with drm_atomic_state_put().
1760 * 0 on success, negative error code on failure.
1762 int drm_atomic_commit(struct drm_atomic_state *state)
1764 struct drm_mode_config *config = &state->dev->mode_config;
1767 ret = drm_atomic_check_only(state);
1771 DRM_DEBUG_ATOMIC("committing %p\n", state);
1773 return config->funcs->atomic_commit(state->dev, state, false);
1775 EXPORT_SYMBOL(drm_atomic_commit);
1778 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1779 * @state: atomic configuration to check
1781 * Note that this function can return -EDEADLK if the driver needed to acquire
1782 * more locks but encountered a deadlock. The caller must then do the usual w/w
1783 * backoff dance and restart. All other errors are fatal.
1785 * This function will take its own reference on @state.
1786 * Callers should always release their reference with drm_atomic_state_put().
1789 * 0 on success, negative error code on failure.
1791 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1793 struct drm_mode_config *config = &state->dev->mode_config;
1796 ret = drm_atomic_check_only(state);
1800 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1802 return config->funcs->atomic_commit(state->dev, state, true);
1804 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1806 static void drm_atomic_print_state(const struct drm_atomic_state *state)
1808 struct drm_printer p = drm_info_printer(state->dev->dev);
1809 struct drm_plane *plane;
1810 struct drm_plane_state *plane_state;
1811 struct drm_crtc *crtc;
1812 struct drm_crtc_state *crtc_state;
1813 struct drm_connector *connector;
1814 struct drm_connector_state *connector_state;
1817 DRM_DEBUG_ATOMIC("checking %p\n", state);
1819 for_each_new_plane_in_state(state, plane, plane_state, i)
1820 drm_atomic_plane_print_state(&p, plane_state);
1822 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1823 drm_atomic_crtc_print_state(&p, crtc_state);
1825 for_each_new_connector_in_state(state, connector, connector_state, i)
1826 drm_atomic_connector_print_state(&p, connector_state);
1829 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1832 struct drm_mode_config *config = &dev->mode_config;
1833 struct drm_plane *plane;
1834 struct drm_crtc *crtc;
1835 struct drm_connector *connector;
1836 struct drm_connector_list_iter conn_iter;
1838 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1841 list_for_each_entry(plane, &config->plane_list, head) {
1843 drm_modeset_lock(&plane->mutex, NULL);
1844 drm_atomic_plane_print_state(p, plane->state);
1846 drm_modeset_unlock(&plane->mutex);
1849 list_for_each_entry(crtc, &config->crtc_list, head) {
1851 drm_modeset_lock(&crtc->mutex, NULL);
1852 drm_atomic_crtc_print_state(p, crtc->state);
1854 drm_modeset_unlock(&crtc->mutex);
1857 drm_connector_list_iter_begin(dev, &conn_iter);
1859 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1860 drm_for_each_connector_iter(connector, &conn_iter)
1861 drm_atomic_connector_print_state(p, connector->state);
1863 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1864 drm_connector_list_iter_end(&conn_iter);
1868 * drm_state_dump - dump entire device atomic state
1869 * @dev: the drm device
1870 * @p: where to print the state to
1872 * Just for debugging. Drivers might want an option to dump state
1873 * to dmesg in case of error irq's. (Hint, you probably want to
1876 * The caller must drm_modeset_lock_all(), or if this is called
1877 * from error irq handler, it should not be enabled by default.
1878 * (Ie. if you are debugging errors you might not care that this
1879 * is racey. But calling this without all modeset locks held is
1880 * not inherently safe.)
1882 void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1884 __drm_state_dump(dev, p, false);
1886 EXPORT_SYMBOL(drm_state_dump);
1888 #ifdef CONFIG_DEBUG_FS
1889 static int drm_state_info(struct seq_file *m, void *data)
1891 struct drm_info_node *node = (struct drm_info_node *) m->private;
1892 struct drm_device *dev = node->minor->dev;
1893 struct drm_printer p = drm_seq_file_printer(m);
1895 __drm_state_dump(dev, &p, true);
1900 /* any use in debugfs files to dump individual planes/crtc/etc? */
1901 static const struct drm_info_list drm_atomic_debugfs_list[] = {
1902 {"state", drm_state_info, 0},
1905 int drm_atomic_debugfs_init(struct drm_minor *minor)
1907 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1908 ARRAY_SIZE(drm_atomic_debugfs_list),
1909 minor->debugfs_root, minor);
1914 * The big monster ioctl
1917 static struct drm_pending_vblank_event *create_vblank_event(
1918 struct drm_crtc *crtc, uint64_t user_data)
1920 struct drm_pending_vblank_event *e = NULL;
1922 e = kzalloc(sizeof *e, GFP_KERNEL);
1926 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1927 e->event.base.length = sizeof(e->event);
1928 e->event.vbl.crtc_id = crtc->base.id;
1929 e->event.vbl.user_data = user_data;
1934 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
1935 struct drm_connector *connector,
1938 struct drm_connector *tmp_connector;
1939 struct drm_connector_state *new_conn_state;
1940 struct drm_crtc *crtc;
1941 struct drm_crtc_state *crtc_state;
1942 int i, ret, old_mode = connector->dpms;
1943 bool active = false;
1945 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
1946 state->acquire_ctx);
1950 if (mode != DRM_MODE_DPMS_ON)
1951 mode = DRM_MODE_DPMS_OFF;
1952 connector->dpms = mode;
1954 crtc = connector->state->crtc;
1957 ret = drm_atomic_add_affected_connectors(state, crtc);
1961 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1962 if (IS_ERR(crtc_state)) {
1963 ret = PTR_ERR(crtc_state);
1967 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
1968 if (new_conn_state->crtc != crtc)
1970 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
1976 crtc_state->active = active;
1977 ret = drm_atomic_commit(state);
1980 connector->dpms = old_mode;
1984 int drm_atomic_set_property(struct drm_atomic_state *state,
1985 struct drm_mode_object *obj,
1986 struct drm_property *prop,
1987 uint64_t prop_value)
1989 struct drm_mode_object *ref;
1992 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1995 switch (obj->type) {
1996 case DRM_MODE_OBJECT_CONNECTOR: {
1997 struct drm_connector *connector = obj_to_connector(obj);
1998 struct drm_connector_state *connector_state;
2000 connector_state = drm_atomic_get_connector_state(state, connector);
2001 if (IS_ERR(connector_state)) {
2002 ret = PTR_ERR(connector_state);
2006 ret = drm_atomic_connector_set_property(connector,
2007 connector_state, prop, prop_value);
2010 case DRM_MODE_OBJECT_CRTC: {
2011 struct drm_crtc *crtc = obj_to_crtc(obj);
2012 struct drm_crtc_state *crtc_state;
2014 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2015 if (IS_ERR(crtc_state)) {
2016 ret = PTR_ERR(crtc_state);
2020 ret = drm_atomic_crtc_set_property(crtc,
2021 crtc_state, prop, prop_value);
2024 case DRM_MODE_OBJECT_PLANE: {
2025 struct drm_plane *plane = obj_to_plane(obj);
2026 struct drm_plane_state *plane_state;
2028 plane_state = drm_atomic_get_plane_state(state, plane);
2029 if (IS_ERR(plane_state)) {
2030 ret = PTR_ERR(plane_state);
2034 ret = drm_atomic_plane_set_property(plane,
2035 plane_state, prop, prop_value);
2043 drm_property_change_valid_put(prop, ref);
2048 * DOC: explicit fencing properties
2050 * Explicit fencing allows userspace to control the buffer synchronization
2051 * between devices. A Fence or a group of fences are transfered to/from
2052 * userspace using Sync File fds and there are two DRM properties for that.
2053 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2054 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2056 * As a contrast, with implicit fencing the kernel keeps track of any
2057 * ongoing rendering, and automatically ensures that the atomic update waits
2058 * for any pending rendering to complete. For shared buffers represented with
2059 * a &struct dma_buf this is tracked in &struct reservation_object.
2060 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2061 * whereas explicit fencing is what Android wants.
2064 * Use this property to pass a fence that DRM should wait on before
2065 * proceeding with the Atomic Commit request and show the framebuffer for
2066 * the plane on the screen. The fence can be either a normal fence or a
2067 * merged one, the sync_file framework will handle both cases and use a
2068 * fence_array if a merged fence is received. Passing -1 here means no
2069 * fences to wait on.
2071 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2072 * it will only check if the Sync File is a valid one.
2074 * On the driver side the fence is stored on the @fence parameter of
2075 * &struct drm_plane_state. Drivers which also support implicit fencing
2076 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2077 * to make sure there's consistent behaviour between drivers in precedence
2078 * of implicit vs. explicit fencing.
2081 * Use this property to pass a file descriptor pointer to DRM. Once the
2082 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2083 * the file descriptor number of a Sync File. This Sync File contains the
2084 * CRTC fence that will be signaled when all framebuffers present on the
2085 * Atomic Commit * request for that given CRTC are scanned out on the
2088 * The Atomic Commit request fails if a invalid pointer is passed. If the
2089 * Atomic Commit request fails for any other reason the out fence fd
2090 * returned will be -1. On a Atomic Commit with the
2091 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2093 * Note that out-fences don't have a special interface to drivers and are
2094 * internally represented by a &struct drm_pending_vblank_event in struct
2095 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2096 * helpers and for the DRM event handling for existing userspace.
2099 struct drm_out_fence_state {
2100 s32 __user *out_fence_ptr;
2101 struct sync_file *sync_file;
2105 static int setup_out_fence(struct drm_out_fence_state *fence_state,
2106 struct dma_fence *fence)
2108 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2109 if (fence_state->fd < 0)
2110 return fence_state->fd;
2112 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2115 fence_state->sync_file = sync_file_create(fence);
2116 if (!fence_state->sync_file)
2122 static int prepare_crtc_signaling(struct drm_device *dev,
2123 struct drm_atomic_state *state,
2124 struct drm_mode_atomic *arg,
2125 struct drm_file *file_priv,
2126 struct drm_out_fence_state **fence_state,
2127 unsigned int *num_fences)
2129 struct drm_crtc *crtc;
2130 struct drm_crtc_state *crtc_state;
2133 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2136 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2137 s32 __user *fence_ptr;
2139 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2141 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2142 struct drm_pending_vblank_event *e;
2144 e = create_vblank_event(crtc, arg->user_data);
2148 crtc_state->event = e;
2151 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2152 struct drm_pending_vblank_event *e = crtc_state->event;
2157 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2161 crtc_state->event = NULL;
2167 struct dma_fence *fence;
2168 struct drm_out_fence_state *f;
2170 f = krealloc(*fence_state, sizeof(**fence_state) *
2171 (*num_fences + 1), GFP_KERNEL);
2175 memset(&f[*num_fences], 0, sizeof(*f));
2177 f[*num_fences].out_fence_ptr = fence_ptr;
2180 fence = drm_crtc_create_fence(crtc);
2184 ret = setup_out_fence(&f[(*num_fences)++], fence);
2186 dma_fence_put(fence);
2190 crtc_state->event->base.fence = fence;
2197 * Having this flag means user mode pends on event which will never
2198 * reach due to lack of at least one CRTC for signaling
2200 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2206 static void complete_crtc_signaling(struct drm_device *dev,
2207 struct drm_atomic_state *state,
2208 struct drm_out_fence_state *fence_state,
2209 unsigned int num_fences,
2212 struct drm_crtc *crtc;
2213 struct drm_crtc_state *crtc_state;
2217 for (i = 0; i < num_fences; i++)
2218 fd_install(fence_state[i].fd,
2219 fence_state[i].sync_file->file);
2225 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2226 struct drm_pending_vblank_event *event = crtc_state->event;
2228 * Free the allocated event. drm_atomic_helper_setup_commit
2229 * can allocate an event too, so only free it if it's ours
2230 * to prevent a double free in drm_atomic_state_clear.
2232 if (event && (event->base.fence || event->base.file_priv)) {
2233 drm_event_cancel_free(dev, &event->base);
2234 crtc_state->event = NULL;
2241 for (i = 0; i < num_fences; i++) {
2242 if (fence_state[i].sync_file)
2243 fput(fence_state[i].sync_file->file);
2244 if (fence_state[i].fd >= 0)
2245 put_unused_fd(fence_state[i].fd);
2247 /* If this fails log error to the user */
2248 if (fence_state[i].out_fence_ptr &&
2249 put_user(-1, fence_state[i].out_fence_ptr))
2250 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2256 int drm_mode_atomic_ioctl(struct drm_device *dev,
2257 void *data, struct drm_file *file_priv)
2259 struct drm_mode_atomic *arg = data;
2260 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2261 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2262 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2263 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2264 unsigned int copied_objs, copied_props;
2265 struct drm_atomic_state *state;
2266 struct drm_modeset_acquire_ctx ctx;
2267 struct drm_out_fence_state *fence_state;
2269 unsigned int i, j, num_fences;
2271 /* disallow for drivers not supporting atomic: */
2272 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2275 /* disallow for userspace that has not enabled atomic cap (even
2276 * though this may be a bit overkill, since legacy userspace
2277 * wouldn't know how to call this ioctl)
2279 if (!file_priv->atomic)
2282 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2288 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2289 !dev->mode_config.async_page_flip)
2292 /* can't test and expect an event at the same time. */
2293 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2294 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2297 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2299 state = drm_atomic_state_alloc(dev);
2303 state->acquire_ctx = &ctx;
2304 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2312 for (i = 0; i < arg->count_objs; i++) {
2313 uint32_t obj_id, count_props;
2314 struct drm_mode_object *obj;
2316 if (get_user(obj_id, objs_ptr + copied_objs)) {
2321 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2327 if (!obj->properties) {
2328 drm_mode_object_put(obj);
2333 if (get_user(count_props, count_props_ptr + copied_objs)) {
2334 drm_mode_object_put(obj);
2341 for (j = 0; j < count_props; j++) {
2343 uint64_t prop_value;
2344 struct drm_property *prop;
2346 if (get_user(prop_id, props_ptr + copied_props)) {
2347 drm_mode_object_put(obj);
2352 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2354 drm_mode_object_put(obj);
2359 if (copy_from_user(&prop_value,
2360 prop_values_ptr + copied_props,
2361 sizeof(prop_value))) {
2362 drm_mode_object_put(obj);
2367 ret = drm_atomic_set_property(state, obj, prop,
2370 drm_mode_object_put(obj);
2377 drm_mode_object_put(obj);
2380 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
2385 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2386 ret = drm_atomic_check_only(state);
2387 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2388 ret = drm_atomic_nonblocking_commit(state);
2390 if (unlikely(drm_debug & DRM_UT_STATE))
2391 drm_atomic_print_state(state);
2393 ret = drm_atomic_commit(state);
2397 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
2399 if (ret == -EDEADLK) {
2400 drm_atomic_state_clear(state);
2401 ret = drm_modeset_backoff(&ctx);
2406 drm_atomic_state_put(state);
2408 drm_modeset_drop_locks(&ctx);
2409 drm_modeset_acquire_fini(&ctx);