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_crtc *crtc = state->crtc;
335 struct drm_mode_modeinfo umode;
337 /* Early return for no change. */
338 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
341 drm_property_blob_put(state->mode_blob);
342 state->mode_blob = NULL;
345 drm_mode_convert_to_umode(&umode, mode);
347 drm_property_create_blob(state->crtc->dev,
350 if (IS_ERR(state->mode_blob))
351 return PTR_ERR(state->mode_blob);
353 drm_mode_copy(&state->mode, mode);
354 state->enable = true;
355 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
356 mode->name, crtc->base.id, crtc->name, state);
358 memset(&state->mode, 0, sizeof(state->mode));
359 state->enable = false;
360 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
361 crtc->base.id, crtc->name, state);
366 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
369 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
370 * @state: the CRTC whose incoming state to update
371 * @blob: pointer to blob property to use for mode
373 * Set a mode (originating from a blob property) on the desired CRTC state.
374 * This function will take a reference on the blob property for the CRTC state,
375 * and release the reference held on the state's existing mode property, if any
379 * Zero on success, error code on failure. Cannot return -EDEADLK.
381 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
382 struct drm_property_blob *blob)
384 struct drm_crtc *crtc = state->crtc;
386 if (blob == state->mode_blob)
389 drm_property_blob_put(state->mode_blob);
390 state->mode_blob = NULL;
392 memset(&state->mode, 0, sizeof(state->mode));
397 if (blob->length != sizeof(struct drm_mode_modeinfo)) {
398 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] bad mode blob length: %zu\n",
399 crtc->base.id, crtc->name,
404 ret = drm_mode_convert_umode(crtc->dev,
405 &state->mode, blob->data);
407 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
408 crtc->base.id, crtc->name,
409 ret, drm_get_mode_status_name(state->mode.status));
410 drm_mode_debug_printmodeline(&state->mode);
414 state->mode_blob = drm_property_blob_get(blob);
415 state->enable = true;
416 DRM_DEBUG_ATOMIC("Set [MODE:%s] for [CRTC:%d:%s] state %p\n",
417 state->mode.name, crtc->base.id, crtc->name,
420 state->enable = false;
421 DRM_DEBUG_ATOMIC("Set [NOMODE] for [CRTC:%d:%s] state %p\n",
422 crtc->base.id, crtc->name, state);
427 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
430 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
432 * @blob: a pointer to the member blob to be replaced
433 * @blob_id: ID of the new blob
434 * @expected_size: total expected size of the blob data (in bytes)
435 * @expected_elem_size: expected element size of the blob data (in bytes)
436 * @replaced: did the blob get replaced?
438 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
439 * @blob becomes NULL.
441 * If @expected_size is positive the new blob length is expected to be equal
442 * to @expected_size bytes. If @expected_elem_size is positive the new blob
443 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
444 * an error is returned.
446 * @replaced will indicate to the caller whether the blob was replaced or not.
447 * If the old and new blobs were in fact the same blob @replaced will be false
448 * otherwise it will be true.
451 * Zero on success, error code on failure.
454 drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
455 struct drm_property_blob **blob,
457 ssize_t expected_size,
458 ssize_t expected_elem_size,
461 struct drm_property_blob *new_blob = NULL;
464 new_blob = drm_property_lookup_blob(dev, blob_id);
465 if (new_blob == NULL)
468 if (expected_size > 0 &&
469 new_blob->length != expected_size) {
470 drm_property_blob_put(new_blob);
473 if (expected_elem_size > 0 &&
474 new_blob->length % expected_elem_size != 0) {
475 drm_property_blob_put(new_blob);
480 *replaced |= drm_property_replace_blob(blob, new_blob);
481 drm_property_blob_put(new_blob);
487 * drm_atomic_crtc_set_property - set property on CRTC
488 * @crtc: the drm CRTC to set a property on
489 * @state: the state object to update with the new property value
490 * @property: the property to set
491 * @val: the new property value
493 * This function handles generic/core properties and calls out to driver's
494 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
495 * consistent behavior you must call this function rather than the driver hook
499 * Zero on success, error code on failure
501 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
502 struct drm_crtc_state *state, struct drm_property *property,
505 struct drm_device *dev = crtc->dev;
506 struct drm_mode_config *config = &dev->mode_config;
507 bool replaced = false;
510 if (property == config->prop_active)
512 else if (property == config->prop_mode_id) {
513 struct drm_property_blob *mode =
514 drm_property_lookup_blob(dev, val);
515 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
516 drm_property_blob_put(mode);
518 } else if (property == config->degamma_lut_property) {
519 ret = drm_atomic_replace_property_blob_from_id(dev,
522 -1, sizeof(struct drm_color_lut),
524 state->color_mgmt_changed |= replaced;
526 } else if (property == config->ctm_property) {
527 ret = drm_atomic_replace_property_blob_from_id(dev,
530 sizeof(struct drm_color_ctm), -1,
532 state->color_mgmt_changed |= replaced;
534 } else if (property == config->gamma_lut_property) {
535 ret = drm_atomic_replace_property_blob_from_id(dev,
538 -1, sizeof(struct drm_color_lut),
540 state->color_mgmt_changed |= replaced;
542 } else if (property == config->prop_out_fence_ptr) {
543 s32 __user *fence_ptr = u64_to_user_ptr(val);
548 if (put_user(-1, fence_ptr))
551 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
552 } else if (crtc->funcs->atomic_set_property) {
553 return crtc->funcs->atomic_set_property(crtc, state, property, val);
555 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
556 crtc->base.id, crtc->name,
557 property->base.id, property->name);
563 EXPORT_SYMBOL(drm_atomic_crtc_set_property);
566 * drm_atomic_crtc_get_property - get property value from CRTC state
567 * @crtc: the drm CRTC to set a property on
568 * @state: the state object to get the property value from
569 * @property: the property to set
570 * @val: return location for the property value
572 * This function handles generic/core properties and calls out to driver's
573 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
574 * consistent behavior you must call this function rather than the driver hook
578 * Zero on success, error code on failure
581 drm_atomic_crtc_get_property(struct drm_crtc *crtc,
582 const struct drm_crtc_state *state,
583 struct drm_property *property, uint64_t *val)
585 struct drm_device *dev = crtc->dev;
586 struct drm_mode_config *config = &dev->mode_config;
588 if (property == config->prop_active)
589 *val = state->active;
590 else if (property == config->prop_mode_id)
591 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
592 else if (property == config->degamma_lut_property)
593 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
594 else if (property == config->ctm_property)
595 *val = (state->ctm) ? state->ctm->base.id : 0;
596 else if (property == config->gamma_lut_property)
597 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
598 else if (property == config->prop_out_fence_ptr)
600 else if (crtc->funcs->atomic_get_property)
601 return crtc->funcs->atomic_get_property(crtc, state, property, val);
609 * drm_atomic_crtc_check - check crtc state
610 * @crtc: crtc to check
611 * @state: crtc state to check
613 * Provides core sanity checks for crtc state.
616 * Zero on success, error code on failure
618 static int drm_atomic_crtc_check(struct drm_crtc *crtc,
619 struct drm_crtc_state *state)
621 /* NOTE: we explicitly don't enforce constraints such as primary
622 * layer covering entire screen, since that is something we want
623 * to allow (on hw that supports it). For hw that does not, it
624 * should be checked in driver's crtc->atomic_check() vfunc.
626 * TODO: Add generic modeset state checks once we support those.
629 if (state->active && !state->enable) {
630 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
631 crtc->base.id, crtc->name);
635 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
636 * as this is a kernel-internal detail that userspace should never
637 * be able to trigger. */
638 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
639 WARN_ON(state->enable && !state->mode_blob)) {
640 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
641 crtc->base.id, crtc->name);
645 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
646 WARN_ON(!state->enable && state->mode_blob)) {
647 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
648 crtc->base.id, crtc->name);
653 * Reject event generation for when a CRTC is off and stays off.
654 * It wouldn't be hard to implement this, but userspace has a track
655 * record of happily burning through 100% cpu (or worse, crash) when the
656 * display pipe is suspended. To avoid all that fun just reject updates
657 * that ask for events since likely that indicates a bug in the
658 * compositor's drawing loop. This is consistent with the vblank IOCTL
659 * and legacy page_flip IOCTL which also reject service on a disabled
662 if (state->event && !state->active && !crtc->state->active) {
663 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
664 crtc->base.id, crtc->name);
671 static void drm_atomic_crtc_print_state(struct drm_printer *p,
672 const struct drm_crtc_state *state)
674 struct drm_crtc *crtc = state->crtc;
676 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
677 drm_printf(p, "\tenable=%d\n", state->enable);
678 drm_printf(p, "\tactive=%d\n", state->active);
679 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
680 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
681 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
682 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
683 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
684 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
685 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
686 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
687 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
689 if (crtc->funcs->atomic_print_state)
690 crtc->funcs->atomic_print_state(p, state);
694 * drm_atomic_get_plane_state - get plane state
695 * @state: global atomic state object
696 * @plane: plane to get state object for
698 * This function returns the plane state for the given plane, allocating it if
699 * needed. It will also grab the relevant plane lock to make sure that the state
704 * Either the allocated state or the error code encoded into the pointer. When
705 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
706 * entire atomic sequence must be restarted. All other errors are fatal.
708 struct drm_plane_state *
709 drm_atomic_get_plane_state(struct drm_atomic_state *state,
710 struct drm_plane *plane)
712 int ret, index = drm_plane_index(plane);
713 struct drm_plane_state *plane_state;
715 WARN_ON(!state->acquire_ctx);
717 /* the legacy pointers should never be set */
719 WARN_ON(plane->old_fb);
720 WARN_ON(plane->crtc);
722 plane_state = drm_atomic_get_existing_plane_state(state, plane);
726 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
730 plane_state = plane->funcs->atomic_duplicate_state(plane);
732 return ERR_PTR(-ENOMEM);
734 state->planes[index].state = plane_state;
735 state->planes[index].ptr = plane;
736 state->planes[index].old_state = plane->state;
737 state->planes[index].new_state = plane_state;
738 plane_state->state = state;
740 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
741 plane->base.id, plane->name, plane_state, state);
743 if (plane_state->crtc) {
744 struct drm_crtc_state *crtc_state;
746 crtc_state = drm_atomic_get_crtc_state(state,
748 if (IS_ERR(crtc_state))
749 return ERR_CAST(crtc_state);
754 EXPORT_SYMBOL(drm_atomic_get_plane_state);
757 * drm_atomic_plane_set_property - set property on plane
758 * @plane: the drm plane to set a property on
759 * @state: the state object to update with the new property value
760 * @property: the property to set
761 * @val: the new property value
763 * This function handles generic/core properties and calls out to driver's
764 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
765 * consistent behavior you must call this function rather than the driver hook
769 * Zero on success, error code on failure
771 static int drm_atomic_plane_set_property(struct drm_plane *plane,
772 struct drm_plane_state *state, struct drm_property *property,
775 struct drm_device *dev = plane->dev;
776 struct drm_mode_config *config = &dev->mode_config;
778 if (property == config->prop_fb_id) {
779 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
780 drm_atomic_set_fb_for_plane(state, fb);
782 drm_framebuffer_put(fb);
783 } else if (property == config->prop_in_fence_fd) {
787 if (U642I64(val) == -1)
790 state->fence = sync_file_get_fence(val);
794 } else if (property == config->prop_crtc_id) {
795 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
796 return drm_atomic_set_crtc_for_plane(state, crtc);
797 } else if (property == config->prop_crtc_x) {
798 state->crtc_x = U642I64(val);
799 } else if (property == config->prop_crtc_y) {
800 state->crtc_y = U642I64(val);
801 } else if (property == config->prop_crtc_w) {
803 } else if (property == config->prop_crtc_h) {
805 } else if (property == config->prop_src_x) {
807 } else if (property == config->prop_src_y) {
809 } else if (property == config->prop_src_w) {
811 } else if (property == config->prop_src_h) {
813 } else if (property == plane->alpha_property) {
815 } else if (property == plane->rotation_property) {
816 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) {
817 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] bad rotation bitmask: 0x%llx\n",
818 plane->base.id, plane->name, val);
821 state->rotation = val;
822 } else if (property == plane->zpos_property) {
824 } else if (property == plane->color_encoding_property) {
825 state->color_encoding = val;
826 } else if (property == plane->color_range_property) {
827 state->color_range = val;
828 } else if (plane->funcs->atomic_set_property) {
829 return plane->funcs->atomic_set_property(plane, state,
832 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
833 plane->base.id, plane->name,
834 property->base.id, property->name);
842 * drm_atomic_plane_get_property - get property value from plane state
843 * @plane: the drm plane to set a property on
844 * @state: the state object to get the property value from
845 * @property: the property to set
846 * @val: return location for the property value
848 * This function handles generic/core properties and calls out to driver's
849 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
850 * consistent behavior you must call this function rather than the driver hook
854 * Zero on success, error code on failure
857 drm_atomic_plane_get_property(struct drm_plane *plane,
858 const struct drm_plane_state *state,
859 struct drm_property *property, uint64_t *val)
861 struct drm_device *dev = plane->dev;
862 struct drm_mode_config *config = &dev->mode_config;
864 if (property == config->prop_fb_id) {
865 *val = (state->fb) ? state->fb->base.id : 0;
866 } else if (property == config->prop_in_fence_fd) {
868 } else if (property == config->prop_crtc_id) {
869 *val = (state->crtc) ? state->crtc->base.id : 0;
870 } else if (property == config->prop_crtc_x) {
871 *val = I642U64(state->crtc_x);
872 } else if (property == config->prop_crtc_y) {
873 *val = I642U64(state->crtc_y);
874 } else if (property == config->prop_crtc_w) {
875 *val = state->crtc_w;
876 } else if (property == config->prop_crtc_h) {
877 *val = state->crtc_h;
878 } else if (property == config->prop_src_x) {
880 } else if (property == config->prop_src_y) {
882 } else if (property == config->prop_src_w) {
884 } else if (property == config->prop_src_h) {
886 } else if (property == plane->alpha_property) {
888 } else if (property == plane->rotation_property) {
889 *val = state->rotation;
890 } else if (property == plane->zpos_property) {
892 } else if (property == plane->color_encoding_property) {
893 *val = state->color_encoding;
894 } else if (property == plane->color_range_property) {
895 *val = state->color_range;
896 } else if (plane->funcs->atomic_get_property) {
897 return plane->funcs->atomic_get_property(plane, state, property, val);
906 plane_switching_crtc(struct drm_atomic_state *state,
907 struct drm_plane *plane,
908 struct drm_plane_state *plane_state)
910 if (!plane->state->crtc || !plane_state->crtc)
913 if (plane->state->crtc == plane_state->crtc)
916 /* This could be refined, but currently there's no helper or driver code
917 * to implement direct switching of active planes nor userspace to take
918 * advantage of more direct plane switching without the intermediate
925 * drm_atomic_plane_check - check plane state
926 * @plane: plane to check
927 * @state: plane state to check
929 * Provides core sanity checks for plane state.
932 * Zero on success, error code on failure
934 static int drm_atomic_plane_check(struct drm_plane *plane,
935 struct drm_plane_state *state)
937 unsigned int fb_width, fb_height;
940 /* either *both* CRTC and FB must be set, or neither */
941 if (state->crtc && !state->fb) {
942 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
943 plane->base.id, plane->name);
945 } else if (state->fb && !state->crtc) {
946 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
947 plane->base.id, plane->name);
951 /* if disabled, we don't care about the rest of the state: */
955 /* Check whether this plane is usable on this CRTC */
956 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
957 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
958 state->crtc->base.id, state->crtc->name,
959 plane->base.id, plane->name);
963 /* Check whether this plane supports the fb pixel format. */
964 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
965 state->fb->modifier);
967 struct drm_format_name_buf format_name;
968 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
969 plane->base.id, plane->name,
970 drm_get_format_name(state->fb->format->format,
972 state->fb->modifier);
976 /* Give drivers some help against integer overflows */
977 if (state->crtc_w > INT_MAX ||
978 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
979 state->crtc_h > INT_MAX ||
980 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
981 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
982 plane->base.id, plane->name,
983 state->crtc_w, state->crtc_h,
984 state->crtc_x, state->crtc_y);
988 fb_width = state->fb->width << 16;
989 fb_height = state->fb->height << 16;
991 /* Make sure source coordinates are inside the fb. */
992 if (state->src_w > fb_width ||
993 state->src_x > fb_width - state->src_w ||
994 state->src_h > fb_height ||
995 state->src_y > fb_height - state->src_h) {
996 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
997 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
998 plane->base.id, plane->name,
999 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
1000 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
1001 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
1002 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
1003 state->fb->width, state->fb->height);
1007 if (plane_switching_crtc(state->state, plane, state)) {
1008 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
1009 plane->base.id, plane->name);
1016 static void drm_atomic_plane_print_state(struct drm_printer *p,
1017 const struct drm_plane_state *state)
1019 struct drm_plane *plane = state->plane;
1020 struct drm_rect src = drm_plane_state_src(state);
1021 struct drm_rect dest = drm_plane_state_dest(state);
1023 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
1024 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1025 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
1027 drm_framebuffer_print_info(p, 2, state->fb);
1028 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
1029 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
1030 drm_printf(p, "\trotation=%x\n", state->rotation);
1031 drm_printf(p, "\tcolor-encoding=%s\n",
1032 drm_get_color_encoding_name(state->color_encoding));
1033 drm_printf(p, "\tcolor-range=%s\n",
1034 drm_get_color_range_name(state->color_range));
1036 if (plane->funcs->atomic_print_state)
1037 plane->funcs->atomic_print_state(p, state);
1041 * DOC: handling driver private state
1043 * Very often the DRM objects exposed to userspace in the atomic modeset api
1044 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1045 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1046 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1047 * planes or CRTCs, and so on) it makes sense to model these as independent
1048 * objects. Drivers then need to do similar state tracking and commit ordering for
1049 * such private (since not exposed to userpace) objects as the atomic core and
1050 * helpers already provide for connectors, planes and CRTCs.
1052 * To make this easier on drivers the atomic core provides some support to track
1053 * driver private state objects using struct &drm_private_obj, with the
1054 * associated state struct &drm_private_state.
1056 * Similar to userspace-exposed objects, private state structures can be
1057 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1058 * does not take care of locking, drivers should wrap it for each type of
1059 * private state object they have with the required call to drm_modeset_lock()
1060 * for the corresponding &drm_modeset_lock.
1062 * All private state structures contained in a &drm_atomic_state update can be
1063 * iterated using for_each_oldnew_private_obj_in_state(),
1064 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1065 * Drivers are recommended to wrap these for each type of driver private state
1066 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1067 * least if they want to iterate over all objects of a given type.
1069 * An earlier way to handle driver private state was by subclassing struct
1070 * &drm_atomic_state. But since that encourages non-standard ways to implement
1071 * the check/commit split atomic requires (by using e.g. "check and rollback or
1072 * commit instead" of "duplicate state, check, then either commit or release
1073 * duplicated state) it is deprecated in favour of using &drm_private_state.
1077 * drm_atomic_private_obj_init - initialize private object
1078 * @obj: private object
1079 * @state: initial private object state
1080 * @funcs: pointer to the struct of function pointers that identify the object
1083 * Initialize the private object, which can be embedded into any
1084 * driver private object that needs its own atomic state.
1087 drm_atomic_private_obj_init(struct drm_private_obj *obj,
1088 struct drm_private_state *state,
1089 const struct drm_private_state_funcs *funcs)
1091 memset(obj, 0, sizeof(*obj));
1096 EXPORT_SYMBOL(drm_atomic_private_obj_init);
1099 * drm_atomic_private_obj_fini - finalize private object
1100 * @obj: private object
1102 * Finalize the private object.
1105 drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1107 obj->funcs->atomic_destroy_state(obj, obj->state);
1109 EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1112 * drm_atomic_get_private_obj_state - get private object state
1113 * @state: global atomic state
1114 * @obj: private object to get the state for
1116 * This function returns the private object state for the given private object,
1117 * allocating the state if needed. It does not grab any locks as the caller is
1118 * expected to care of any required locking.
1122 * Either the allocated state or the error code encoded into a pointer.
1124 struct drm_private_state *
1125 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1126 struct drm_private_obj *obj)
1128 int index, num_objs, i;
1130 struct __drm_private_objs_state *arr;
1131 struct drm_private_state *obj_state;
1133 for (i = 0; i < state->num_private_objs; i++)
1134 if (obj == state->private_objs[i].ptr)
1135 return state->private_objs[i].state;
1137 num_objs = state->num_private_objs + 1;
1138 size = sizeof(*state->private_objs) * num_objs;
1139 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1141 return ERR_PTR(-ENOMEM);
1143 state->private_objs = arr;
1144 index = state->num_private_objs;
1145 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1147 obj_state = obj->funcs->atomic_duplicate_state(obj);
1149 return ERR_PTR(-ENOMEM);
1151 state->private_objs[index].state = obj_state;
1152 state->private_objs[index].old_state = obj->state;
1153 state->private_objs[index].new_state = obj_state;
1154 state->private_objs[index].ptr = obj;
1156 state->num_private_objs = num_objs;
1158 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1159 obj, obj_state, state);
1163 EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1166 * drm_atomic_get_connector_state - get connector state
1167 * @state: global atomic state object
1168 * @connector: connector to get state object for
1170 * This function returns the connector state for the given connector,
1171 * allocating it if needed. It will also grab the relevant connector lock to
1172 * make sure that the state is consistent.
1176 * Either the allocated state or the error code encoded into the pointer. When
1177 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1178 * entire atomic sequence must be restarted. All other errors are fatal.
1180 struct drm_connector_state *
1181 drm_atomic_get_connector_state(struct drm_atomic_state *state,
1182 struct drm_connector *connector)
1185 struct drm_mode_config *config = &connector->dev->mode_config;
1186 struct drm_connector_state *connector_state;
1188 WARN_ON(!state->acquire_ctx);
1190 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1192 return ERR_PTR(ret);
1194 index = drm_connector_index(connector);
1196 if (index >= state->num_connector) {
1197 struct __drm_connnectors_state *c;
1198 int alloc = max(index + 1, config->num_connector);
1200 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1202 return ERR_PTR(-ENOMEM);
1204 state->connectors = c;
1205 memset(&state->connectors[state->num_connector], 0,
1206 sizeof(*state->connectors) * (alloc - state->num_connector));
1208 state->num_connector = alloc;
1211 if (state->connectors[index].state)
1212 return state->connectors[index].state;
1214 connector_state = connector->funcs->atomic_duplicate_state(connector);
1215 if (!connector_state)
1216 return ERR_PTR(-ENOMEM);
1218 drm_connector_get(connector);
1219 state->connectors[index].state = connector_state;
1220 state->connectors[index].old_state = connector->state;
1221 state->connectors[index].new_state = connector_state;
1222 state->connectors[index].ptr = connector;
1223 connector_state->state = state;
1225 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1226 connector->base.id, connector->name,
1227 connector_state, state);
1229 if (connector_state->crtc) {
1230 struct drm_crtc_state *crtc_state;
1232 crtc_state = drm_atomic_get_crtc_state(state,
1233 connector_state->crtc);
1234 if (IS_ERR(crtc_state))
1235 return ERR_CAST(crtc_state);
1238 return connector_state;
1240 EXPORT_SYMBOL(drm_atomic_get_connector_state);
1243 * drm_atomic_connector_set_property - set property on connector.
1244 * @connector: the drm connector to set a property on
1245 * @state: the state object to update with the new property value
1246 * @property: the property to set
1247 * @val: the new property value
1249 * This function handles generic/core properties and calls out to driver's
1250 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1251 * consistent behavior you must call this function rather than the driver hook
1255 * Zero on success, error code on failure
1257 static int drm_atomic_connector_set_property(struct drm_connector *connector,
1258 struct drm_connector_state *state, struct drm_property *property,
1261 struct drm_device *dev = connector->dev;
1262 struct drm_mode_config *config = &dev->mode_config;
1264 if (property == config->prop_crtc_id) {
1265 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1266 return drm_atomic_set_crtc_for_connector(state, crtc);
1267 } else if (property == config->dpms_property) {
1268 /* setting DPMS property requires special handling, which
1269 * is done in legacy setprop path for us. Disallow (for
1270 * now?) atomic writes to DPMS property:
1273 } else if (property == config->tv_select_subconnector_property) {
1274 state->tv.subconnector = val;
1275 } else if (property == config->tv_left_margin_property) {
1276 state->tv.margins.left = val;
1277 } else if (property == config->tv_right_margin_property) {
1278 state->tv.margins.right = val;
1279 } else if (property == config->tv_top_margin_property) {
1280 state->tv.margins.top = val;
1281 } else if (property == config->tv_bottom_margin_property) {
1282 state->tv.margins.bottom = val;
1283 } else if (property == config->tv_mode_property) {
1284 state->tv.mode = val;
1285 } else if (property == config->tv_brightness_property) {
1286 state->tv.brightness = val;
1287 } else if (property == config->tv_contrast_property) {
1288 state->tv.contrast = val;
1289 } else if (property == config->tv_flicker_reduction_property) {
1290 state->tv.flicker_reduction = val;
1291 } else if (property == config->tv_overscan_property) {
1292 state->tv.overscan = val;
1293 } else if (property == config->tv_saturation_property) {
1294 state->tv.saturation = val;
1295 } else if (property == config->tv_hue_property) {
1296 state->tv.hue = val;
1297 } else if (property == config->link_status_property) {
1298 /* Never downgrade from GOOD to BAD on userspace's request here,
1299 * only hw issues can do that.
1301 * For an atomic property the userspace doesn't need to be able
1302 * to understand all the properties, but needs to be able to
1303 * restore the state it wants on VT switch. So if the userspace
1304 * tries to change the link_status from GOOD to BAD, driver
1305 * silently rejects it and returns a 0. This prevents userspace
1306 * from accidently breaking the display when it restores the
1309 if (state->link_status != DRM_LINK_STATUS_GOOD)
1310 state->link_status = val;
1311 } else if (property == config->aspect_ratio_property) {
1312 state->picture_aspect_ratio = val;
1313 } else if (property == config->content_type_property) {
1314 state->content_type = val;
1315 } else if (property == connector->scaling_mode_property) {
1316 state->scaling_mode = val;
1317 } else if (property == connector->content_protection_property) {
1318 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1319 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1322 state->content_protection = val;
1323 } else if (connector->funcs->atomic_set_property) {
1324 return connector->funcs->atomic_set_property(connector,
1325 state, property, val);
1327 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] unknown property [PROP:%d:%s]]\n",
1328 connector->base.id, connector->name,
1329 property->base.id, property->name);
1336 static void drm_atomic_connector_print_state(struct drm_printer *p,
1337 const struct drm_connector_state *state)
1339 struct drm_connector *connector = state->connector;
1341 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1342 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1344 if (connector->funcs->atomic_print_state)
1345 connector->funcs->atomic_print_state(p, state);
1349 * drm_atomic_connector_get_property - get property value from connector state
1350 * @connector: the drm connector to set a property on
1351 * @state: the state object to get the property value from
1352 * @property: the property to set
1353 * @val: return location for the property value
1355 * This function handles generic/core properties and calls out to driver's
1356 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1357 * consistent behavior you must call this function rather than the driver hook
1361 * Zero on success, error code on failure
1364 drm_atomic_connector_get_property(struct drm_connector *connector,
1365 const struct drm_connector_state *state,
1366 struct drm_property *property, uint64_t *val)
1368 struct drm_device *dev = connector->dev;
1369 struct drm_mode_config *config = &dev->mode_config;
1371 if (property == config->prop_crtc_id) {
1372 *val = (state->crtc) ? state->crtc->base.id : 0;
1373 } else if (property == config->dpms_property) {
1374 *val = connector->dpms;
1375 } else if (property == config->tv_select_subconnector_property) {
1376 *val = state->tv.subconnector;
1377 } else if (property == config->tv_left_margin_property) {
1378 *val = state->tv.margins.left;
1379 } else if (property == config->tv_right_margin_property) {
1380 *val = state->tv.margins.right;
1381 } else if (property == config->tv_top_margin_property) {
1382 *val = state->tv.margins.top;
1383 } else if (property == config->tv_bottom_margin_property) {
1384 *val = state->tv.margins.bottom;
1385 } else if (property == config->tv_mode_property) {
1386 *val = state->tv.mode;
1387 } else if (property == config->tv_brightness_property) {
1388 *val = state->tv.brightness;
1389 } else if (property == config->tv_contrast_property) {
1390 *val = state->tv.contrast;
1391 } else if (property == config->tv_flicker_reduction_property) {
1392 *val = state->tv.flicker_reduction;
1393 } else if (property == config->tv_overscan_property) {
1394 *val = state->tv.overscan;
1395 } else if (property == config->tv_saturation_property) {
1396 *val = state->tv.saturation;
1397 } else if (property == config->tv_hue_property) {
1398 *val = state->tv.hue;
1399 } else if (property == config->link_status_property) {
1400 *val = state->link_status;
1401 } else if (property == config->aspect_ratio_property) {
1402 *val = state->picture_aspect_ratio;
1403 } else if (property == config->content_type_property) {
1404 *val = state->content_type;
1405 } else if (property == connector->scaling_mode_property) {
1406 *val = state->scaling_mode;
1407 } else if (property == connector->content_protection_property) {
1408 *val = state->content_protection;
1409 } else if (connector->funcs->atomic_get_property) {
1410 return connector->funcs->atomic_get_property(connector,
1411 state, property, val);
1419 int drm_atomic_get_property(struct drm_mode_object *obj,
1420 struct drm_property *property, uint64_t *val)
1422 struct drm_device *dev = property->dev;
1425 switch (obj->type) {
1426 case DRM_MODE_OBJECT_CONNECTOR: {
1427 struct drm_connector *connector = obj_to_connector(obj);
1428 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1429 ret = drm_atomic_connector_get_property(connector,
1430 connector->state, property, val);
1433 case DRM_MODE_OBJECT_CRTC: {
1434 struct drm_crtc *crtc = obj_to_crtc(obj);
1435 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1436 ret = drm_atomic_crtc_get_property(crtc,
1437 crtc->state, property, val);
1440 case DRM_MODE_OBJECT_PLANE: {
1441 struct drm_plane *plane = obj_to_plane(obj);
1442 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1443 ret = drm_atomic_plane_get_property(plane,
1444 plane->state, property, val);
1456 * drm_atomic_set_crtc_for_plane - set crtc for plane
1457 * @plane_state: the plane whose incoming state to update
1458 * @crtc: crtc to use for the plane
1460 * Changing the assigned crtc for a plane requires us to grab the lock and state
1461 * for the new crtc, as needed. This function takes care of all these details
1462 * besides updating the pointer in the state object itself.
1465 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1466 * then the w/w mutex code has detected a deadlock and the entire atomic
1467 * sequence must be restarted. All other errors are fatal.
1470 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1471 struct drm_crtc *crtc)
1473 struct drm_plane *plane = plane_state->plane;
1474 struct drm_crtc_state *crtc_state;
1475 /* Nothing to do for same crtc*/
1476 if (plane_state->crtc == crtc)
1478 if (plane_state->crtc) {
1479 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1481 if (WARN_ON(IS_ERR(crtc_state)))
1482 return PTR_ERR(crtc_state);
1484 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1487 plane_state->crtc = crtc;
1490 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1492 if (IS_ERR(crtc_state))
1493 return PTR_ERR(crtc_state);
1494 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1498 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [CRTC:%d:%s]\n",
1499 plane->base.id, plane->name, plane_state,
1500 crtc->base.id, crtc->name);
1502 DRM_DEBUG_ATOMIC("Link [PLANE:%d:%s] state %p to [NOCRTC]\n",
1503 plane->base.id, plane->name, plane_state);
1507 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1510 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1511 * @plane_state: atomic state object for the plane
1512 * @fb: fb to use for the plane
1514 * Changing the assigned framebuffer for a plane requires us to grab a reference
1515 * to the new fb and drop the reference to the old fb, if there is one. This
1516 * function takes care of all these details besides updating the pointer in the
1517 * state object itself.
1520 drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1521 struct drm_framebuffer *fb)
1523 struct drm_plane *plane = plane_state->plane;
1526 DRM_DEBUG_ATOMIC("Set [FB:%d] for [PLANE:%d:%s] state %p\n",
1527 fb->base.id, plane->base.id, plane->name,
1530 DRM_DEBUG_ATOMIC("Set [NOFB] for [PLANE:%d:%s] state %p\n",
1531 plane->base.id, plane->name, plane_state);
1533 drm_framebuffer_assign(&plane_state->fb, fb);
1535 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1538 * drm_atomic_set_fence_for_plane - set fence for plane
1539 * @plane_state: atomic state object for the plane
1540 * @fence: dma_fence to use for the plane
1542 * Helper to setup the plane_state fence in case it is not set yet.
1543 * By using this drivers doesn't need to worry if the user choose
1544 * implicit or explicit fencing.
1546 * This function will not set the fence to the state if it was set
1547 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1548 * drop the reference to the fence as we are not storing it anywhere.
1549 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1550 * with the received implicit fence. In both cases this function consumes a
1551 * reference for @fence.
1553 * This way explicit fencing can be used to overrule implicit fencing, which is
1554 * important to make explicit fencing use-cases work: One example is using one
1555 * buffer for 2 screens with different refresh rates. Implicit fencing will
1556 * clamp rendering to the refresh rate of the slower screen, whereas explicit
1557 * fence allows 2 independent render and display loops on a single buffer. If a
1558 * driver allows obeys both implicit and explicit fences for plane updates, then
1559 * it will break all the benefits of explicit fencing.
1562 drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1563 struct dma_fence *fence)
1565 if (plane_state->fence) {
1566 dma_fence_put(fence);
1570 plane_state->fence = fence;
1572 EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1575 * drm_atomic_set_crtc_for_connector - set crtc for connector
1576 * @conn_state: atomic state object for the connector
1577 * @crtc: crtc to use for the connector
1579 * Changing the assigned crtc for a connector requires us to grab the lock and
1580 * state for the new crtc, as needed. This function takes care of all these
1581 * details besides updating the pointer in the state object itself.
1584 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1585 * then the w/w mutex code has detected a deadlock and the entire atomic
1586 * sequence must be restarted. All other errors are fatal.
1589 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1590 struct drm_crtc *crtc)
1592 struct drm_connector *connector = conn_state->connector;
1593 struct drm_crtc_state *crtc_state;
1595 if (conn_state->crtc == crtc)
1598 if (conn_state->crtc) {
1599 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1602 crtc_state->connector_mask &=
1603 ~(1 << drm_connector_index(conn_state->connector));
1605 drm_connector_put(conn_state->connector);
1606 conn_state->crtc = NULL;
1610 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1611 if (IS_ERR(crtc_state))
1612 return PTR_ERR(crtc_state);
1614 crtc_state->connector_mask |=
1615 1 << drm_connector_index(conn_state->connector);
1617 drm_connector_get(conn_state->connector);
1618 conn_state->crtc = crtc;
1620 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [CRTC:%d:%s]\n",
1621 connector->base.id, connector->name,
1622 conn_state, crtc->base.id, crtc->name);
1624 DRM_DEBUG_ATOMIC("Link [CONNECTOR:%d:%s] state %p to [NOCRTC]\n",
1625 connector->base.id, connector->name,
1631 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1634 * drm_atomic_add_affected_connectors - add connectors for crtc
1635 * @state: atomic state
1638 * This function walks the current configuration and adds all connectors
1639 * currently using @crtc to the atomic configuration @state. Note that this
1640 * function must acquire the connection mutex. This can potentially cause
1641 * unneeded seralization if the update is just for the planes on one crtc. Hence
1642 * drivers and helpers should only call this when really needed (e.g. when a
1643 * full modeset needs to happen due to some change).
1646 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1647 * then the w/w mutex code has detected a deadlock and the entire atomic
1648 * sequence must be restarted. All other errors are fatal.
1651 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1652 struct drm_crtc *crtc)
1654 struct drm_mode_config *config = &state->dev->mode_config;
1655 struct drm_connector *connector;
1656 struct drm_connector_state *conn_state;
1657 struct drm_connector_list_iter conn_iter;
1658 struct drm_crtc_state *crtc_state;
1661 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1662 if (IS_ERR(crtc_state))
1663 return PTR_ERR(crtc_state);
1665 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1669 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1670 crtc->base.id, crtc->name, state);
1673 * Changed connectors are already in @state, so only need to look
1674 * at the connector_mask in crtc_state.
1676 drm_connector_list_iter_begin(state->dev, &conn_iter);
1677 drm_for_each_connector_iter(connector, &conn_iter) {
1678 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector))))
1681 conn_state = drm_atomic_get_connector_state(state, connector);
1682 if (IS_ERR(conn_state)) {
1683 drm_connector_list_iter_end(&conn_iter);
1684 return PTR_ERR(conn_state);
1687 drm_connector_list_iter_end(&conn_iter);
1691 EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1694 * drm_atomic_add_affected_planes - add planes for crtc
1695 * @state: atomic state
1698 * This function walks the current configuration and adds all planes
1699 * currently used by @crtc to the atomic configuration @state. This is useful
1700 * when an atomic commit also needs to check all currently enabled plane on
1701 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1702 * to avoid special code to force-enable all planes.
1704 * Since acquiring a plane state will always also acquire the w/w mutex of the
1705 * current CRTC for that plane (if there is any) adding all the plane states for
1706 * a CRTC will not reduce parallism of atomic updates.
1709 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1710 * then the w/w mutex code has detected a deadlock and the entire atomic
1711 * sequence must be restarted. All other errors are fatal.
1714 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1715 struct drm_crtc *crtc)
1717 struct drm_plane *plane;
1719 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1721 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1722 crtc->base.id, crtc->name, state);
1724 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1725 struct drm_plane_state *plane_state =
1726 drm_atomic_get_plane_state(state, plane);
1728 if (IS_ERR(plane_state))
1729 return PTR_ERR(plane_state);
1733 EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1736 * drm_atomic_check_only - check whether a given config would work
1737 * @state: atomic configuration to check
1739 * Note that this function can return -EDEADLK if the driver needed to acquire
1740 * more locks but encountered a deadlock. The caller must then do the usual w/w
1741 * backoff dance and restart. All other errors are fatal.
1744 * 0 on success, negative error code on failure.
1746 int drm_atomic_check_only(struct drm_atomic_state *state)
1748 struct drm_device *dev = state->dev;
1749 struct drm_mode_config *config = &dev->mode_config;
1750 struct drm_plane *plane;
1751 struct drm_plane_state *plane_state;
1752 struct drm_crtc *crtc;
1753 struct drm_crtc_state *crtc_state;
1756 DRM_DEBUG_ATOMIC("checking %p\n", state);
1758 for_each_new_plane_in_state(state, plane, plane_state, i) {
1759 ret = drm_atomic_plane_check(plane, plane_state);
1761 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1762 plane->base.id, plane->name);
1767 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1768 ret = drm_atomic_crtc_check(crtc, crtc_state);
1770 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1771 crtc->base.id, crtc->name);
1776 if (config->funcs->atomic_check)
1777 ret = config->funcs->atomic_check(state->dev, state);
1782 if (!state->allow_modeset) {
1783 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1784 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1785 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1786 crtc->base.id, crtc->name);
1794 EXPORT_SYMBOL(drm_atomic_check_only);
1797 * drm_atomic_commit - commit configuration atomically
1798 * @state: atomic configuration to check
1800 * Note that this function can return -EDEADLK if the driver needed to acquire
1801 * more locks but encountered a deadlock. The caller must then do the usual w/w
1802 * backoff dance and restart. All other errors are fatal.
1804 * This function will take its own reference on @state.
1805 * Callers should always release their reference with drm_atomic_state_put().
1808 * 0 on success, negative error code on failure.
1810 int drm_atomic_commit(struct drm_atomic_state *state)
1812 struct drm_mode_config *config = &state->dev->mode_config;
1815 ret = drm_atomic_check_only(state);
1819 DRM_DEBUG_ATOMIC("committing %p\n", state);
1821 return config->funcs->atomic_commit(state->dev, state, false);
1823 EXPORT_SYMBOL(drm_atomic_commit);
1826 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1827 * @state: atomic configuration to check
1829 * Note that this function can return -EDEADLK if the driver needed to acquire
1830 * more locks but encountered a deadlock. The caller must then do the usual w/w
1831 * backoff dance and restart. All other errors are fatal.
1833 * This function will take its own reference on @state.
1834 * Callers should always release their reference with drm_atomic_state_put().
1837 * 0 on success, negative error code on failure.
1839 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1841 struct drm_mode_config *config = &state->dev->mode_config;
1844 ret = drm_atomic_check_only(state);
1848 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1850 return config->funcs->atomic_commit(state->dev, state, true);
1852 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1854 static void drm_atomic_print_state(const struct drm_atomic_state *state)
1856 struct drm_printer p = drm_info_printer(state->dev->dev);
1857 struct drm_plane *plane;
1858 struct drm_plane_state *plane_state;
1859 struct drm_crtc *crtc;
1860 struct drm_crtc_state *crtc_state;
1861 struct drm_connector *connector;
1862 struct drm_connector_state *connector_state;
1865 DRM_DEBUG_ATOMIC("checking %p\n", state);
1867 for_each_new_plane_in_state(state, plane, plane_state, i)
1868 drm_atomic_plane_print_state(&p, plane_state);
1870 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1871 drm_atomic_crtc_print_state(&p, crtc_state);
1873 for_each_new_connector_in_state(state, connector, connector_state, i)
1874 drm_atomic_connector_print_state(&p, connector_state);
1877 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1880 struct drm_mode_config *config = &dev->mode_config;
1881 struct drm_plane *plane;
1882 struct drm_crtc *crtc;
1883 struct drm_connector *connector;
1884 struct drm_connector_list_iter conn_iter;
1886 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1889 list_for_each_entry(plane, &config->plane_list, head) {
1891 drm_modeset_lock(&plane->mutex, NULL);
1892 drm_atomic_plane_print_state(p, plane->state);
1894 drm_modeset_unlock(&plane->mutex);
1897 list_for_each_entry(crtc, &config->crtc_list, head) {
1899 drm_modeset_lock(&crtc->mutex, NULL);
1900 drm_atomic_crtc_print_state(p, crtc->state);
1902 drm_modeset_unlock(&crtc->mutex);
1905 drm_connector_list_iter_begin(dev, &conn_iter);
1907 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1908 drm_for_each_connector_iter(connector, &conn_iter)
1909 drm_atomic_connector_print_state(p, connector->state);
1911 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1912 drm_connector_list_iter_end(&conn_iter);
1916 * drm_state_dump - dump entire device atomic state
1917 * @dev: the drm device
1918 * @p: where to print the state to
1920 * Just for debugging. Drivers might want an option to dump state
1921 * to dmesg in case of error irq's. (Hint, you probably want to
1924 * The caller must drm_modeset_lock_all(), or if this is called
1925 * from error irq handler, it should not be enabled by default.
1926 * (Ie. if you are debugging errors you might not care that this
1927 * is racey. But calling this without all modeset locks held is
1928 * not inherently safe.)
1930 void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1932 __drm_state_dump(dev, p, false);
1934 EXPORT_SYMBOL(drm_state_dump);
1936 #ifdef CONFIG_DEBUG_FS
1937 static int drm_state_info(struct seq_file *m, void *data)
1939 struct drm_info_node *node = (struct drm_info_node *) m->private;
1940 struct drm_device *dev = node->minor->dev;
1941 struct drm_printer p = drm_seq_file_printer(m);
1943 __drm_state_dump(dev, &p, true);
1948 /* any use in debugfs files to dump individual planes/crtc/etc? */
1949 static const struct drm_info_list drm_atomic_debugfs_list[] = {
1950 {"state", drm_state_info, 0},
1953 int drm_atomic_debugfs_init(struct drm_minor *minor)
1955 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1956 ARRAY_SIZE(drm_atomic_debugfs_list),
1957 minor->debugfs_root, minor);
1962 * The big monster ioctl
1965 static struct drm_pending_vblank_event *create_vblank_event(
1966 struct drm_crtc *crtc, uint64_t user_data)
1968 struct drm_pending_vblank_event *e = NULL;
1970 e = kzalloc(sizeof *e, GFP_KERNEL);
1974 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1975 e->event.base.length = sizeof(e->event);
1976 e->event.vbl.crtc_id = crtc->base.id;
1977 e->event.vbl.user_data = user_data;
1982 int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
1983 struct drm_connector *connector,
1986 struct drm_connector *tmp_connector;
1987 struct drm_connector_state *new_conn_state;
1988 struct drm_crtc *crtc;
1989 struct drm_crtc_state *crtc_state;
1990 int i, ret, old_mode = connector->dpms;
1991 bool active = false;
1993 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
1994 state->acquire_ctx);
1998 if (mode != DRM_MODE_DPMS_ON)
1999 mode = DRM_MODE_DPMS_OFF;
2000 connector->dpms = mode;
2002 crtc = connector->state->crtc;
2005 ret = drm_atomic_add_affected_connectors(state, crtc);
2009 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2010 if (IS_ERR(crtc_state)) {
2011 ret = PTR_ERR(crtc_state);
2015 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
2016 if (new_conn_state->crtc != crtc)
2018 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
2024 crtc_state->active = active;
2025 ret = drm_atomic_commit(state);
2028 connector->dpms = old_mode;
2032 int drm_atomic_set_property(struct drm_atomic_state *state,
2033 struct drm_mode_object *obj,
2034 struct drm_property *prop,
2035 uint64_t prop_value)
2037 struct drm_mode_object *ref;
2040 if (!drm_property_change_valid_get(prop, prop_value, &ref))
2043 switch (obj->type) {
2044 case DRM_MODE_OBJECT_CONNECTOR: {
2045 struct drm_connector *connector = obj_to_connector(obj);
2046 struct drm_connector_state *connector_state;
2048 connector_state = drm_atomic_get_connector_state(state, connector);
2049 if (IS_ERR(connector_state)) {
2050 ret = PTR_ERR(connector_state);
2054 ret = drm_atomic_connector_set_property(connector,
2055 connector_state, prop, prop_value);
2058 case DRM_MODE_OBJECT_CRTC: {
2059 struct drm_crtc *crtc = obj_to_crtc(obj);
2060 struct drm_crtc_state *crtc_state;
2062 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2063 if (IS_ERR(crtc_state)) {
2064 ret = PTR_ERR(crtc_state);
2068 ret = drm_atomic_crtc_set_property(crtc,
2069 crtc_state, prop, prop_value);
2072 case DRM_MODE_OBJECT_PLANE: {
2073 struct drm_plane *plane = obj_to_plane(obj);
2074 struct drm_plane_state *plane_state;
2076 plane_state = drm_atomic_get_plane_state(state, plane);
2077 if (IS_ERR(plane_state)) {
2078 ret = PTR_ERR(plane_state);
2082 ret = drm_atomic_plane_set_property(plane,
2083 plane_state, prop, prop_value);
2091 drm_property_change_valid_put(prop, ref);
2096 * DOC: explicit fencing properties
2098 * Explicit fencing allows userspace to control the buffer synchronization
2099 * between devices. A Fence or a group of fences are transfered to/from
2100 * userspace using Sync File fds and there are two DRM properties for that.
2101 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2102 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2104 * As a contrast, with implicit fencing the kernel keeps track of any
2105 * ongoing rendering, and automatically ensures that the atomic update waits
2106 * for any pending rendering to complete. For shared buffers represented with
2107 * a &struct dma_buf this is tracked in &struct reservation_object.
2108 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2109 * whereas explicit fencing is what Android wants.
2112 * Use this property to pass a fence that DRM should wait on before
2113 * proceeding with the Atomic Commit request and show the framebuffer for
2114 * the plane on the screen. The fence can be either a normal fence or a
2115 * merged one, the sync_file framework will handle both cases and use a
2116 * fence_array if a merged fence is received. Passing -1 here means no
2117 * fences to wait on.
2119 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2120 * it will only check if the Sync File is a valid one.
2122 * On the driver side the fence is stored on the @fence parameter of
2123 * &struct drm_plane_state. Drivers which also support implicit fencing
2124 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2125 * to make sure there's consistent behaviour between drivers in precedence
2126 * of implicit vs. explicit fencing.
2129 * Use this property to pass a file descriptor pointer to DRM. Once the
2130 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2131 * the file descriptor number of a Sync File. This Sync File contains the
2132 * CRTC fence that will be signaled when all framebuffers present on the
2133 * Atomic Commit * request for that given CRTC are scanned out on the
2136 * The Atomic Commit request fails if a invalid pointer is passed. If the
2137 * Atomic Commit request fails for any other reason the out fence fd
2138 * returned will be -1. On a Atomic Commit with the
2139 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2141 * Note that out-fences don't have a special interface to drivers and are
2142 * internally represented by a &struct drm_pending_vblank_event in struct
2143 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2144 * helpers and for the DRM event handling for existing userspace.
2147 struct drm_out_fence_state {
2148 s32 __user *out_fence_ptr;
2149 struct sync_file *sync_file;
2153 static int setup_out_fence(struct drm_out_fence_state *fence_state,
2154 struct dma_fence *fence)
2156 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2157 if (fence_state->fd < 0)
2158 return fence_state->fd;
2160 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2163 fence_state->sync_file = sync_file_create(fence);
2164 if (!fence_state->sync_file)
2170 static int prepare_crtc_signaling(struct drm_device *dev,
2171 struct drm_atomic_state *state,
2172 struct drm_mode_atomic *arg,
2173 struct drm_file *file_priv,
2174 struct drm_out_fence_state **fence_state,
2175 unsigned int *num_fences)
2177 struct drm_crtc *crtc;
2178 struct drm_crtc_state *crtc_state;
2181 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2184 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2185 s32 __user *fence_ptr;
2187 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2189 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2190 struct drm_pending_vblank_event *e;
2192 e = create_vblank_event(crtc, arg->user_data);
2196 crtc_state->event = e;
2199 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2200 struct drm_pending_vblank_event *e = crtc_state->event;
2205 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2209 crtc_state->event = NULL;
2215 struct dma_fence *fence;
2216 struct drm_out_fence_state *f;
2218 f = krealloc(*fence_state, sizeof(**fence_state) *
2219 (*num_fences + 1), GFP_KERNEL);
2223 memset(&f[*num_fences], 0, sizeof(*f));
2225 f[*num_fences].out_fence_ptr = fence_ptr;
2228 fence = drm_crtc_create_fence(crtc);
2232 ret = setup_out_fence(&f[(*num_fences)++], fence);
2234 dma_fence_put(fence);
2238 crtc_state->event->base.fence = fence;
2245 * Having this flag means user mode pends on event which will never
2246 * reach due to lack of at least one CRTC for signaling
2248 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2254 static void complete_crtc_signaling(struct drm_device *dev,
2255 struct drm_atomic_state *state,
2256 struct drm_out_fence_state *fence_state,
2257 unsigned int num_fences,
2260 struct drm_crtc *crtc;
2261 struct drm_crtc_state *crtc_state;
2265 for (i = 0; i < num_fences; i++)
2266 fd_install(fence_state[i].fd,
2267 fence_state[i].sync_file->file);
2273 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2274 struct drm_pending_vblank_event *event = crtc_state->event;
2276 * Free the allocated event. drm_atomic_helper_setup_commit
2277 * can allocate an event too, so only free it if it's ours
2278 * to prevent a double free in drm_atomic_state_clear.
2280 if (event && (event->base.fence || event->base.file_priv)) {
2281 drm_event_cancel_free(dev, &event->base);
2282 crtc_state->event = NULL;
2289 for (i = 0; i < num_fences; i++) {
2290 if (fence_state[i].sync_file)
2291 fput(fence_state[i].sync_file->file);
2292 if (fence_state[i].fd >= 0)
2293 put_unused_fd(fence_state[i].fd);
2295 /* If this fails log error to the user */
2296 if (fence_state[i].out_fence_ptr &&
2297 put_user(-1, fence_state[i].out_fence_ptr))
2298 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2304 int drm_mode_atomic_ioctl(struct drm_device *dev,
2305 void *data, struct drm_file *file_priv)
2307 struct drm_mode_atomic *arg = data;
2308 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2309 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2310 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2311 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2312 unsigned int copied_objs, copied_props;
2313 struct drm_atomic_state *state;
2314 struct drm_modeset_acquire_ctx ctx;
2315 struct drm_out_fence_state *fence_state;
2317 unsigned int i, j, num_fences;
2319 /* disallow for drivers not supporting atomic: */
2320 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2323 /* disallow for userspace that has not enabled atomic cap (even
2324 * though this may be a bit overkill, since legacy userspace
2325 * wouldn't know how to call this ioctl)
2327 if (!file_priv->atomic)
2330 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2336 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2337 !dev->mode_config.async_page_flip)
2340 /* can't test and expect an event at the same time. */
2341 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2342 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2345 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2347 state = drm_atomic_state_alloc(dev);
2351 state->acquire_ctx = &ctx;
2352 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2360 for (i = 0; i < arg->count_objs; i++) {
2361 uint32_t obj_id, count_props;
2362 struct drm_mode_object *obj;
2364 if (get_user(obj_id, objs_ptr + copied_objs)) {
2369 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2375 if (!obj->properties) {
2376 drm_mode_object_put(obj);
2381 if (get_user(count_props, count_props_ptr + copied_objs)) {
2382 drm_mode_object_put(obj);
2389 for (j = 0; j < count_props; j++) {
2391 uint64_t prop_value;
2392 struct drm_property *prop;
2394 if (get_user(prop_id, props_ptr + copied_props)) {
2395 drm_mode_object_put(obj);
2400 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2402 drm_mode_object_put(obj);
2407 if (copy_from_user(&prop_value,
2408 prop_values_ptr + copied_props,
2409 sizeof(prop_value))) {
2410 drm_mode_object_put(obj);
2415 ret = drm_atomic_set_property(state, obj, prop,
2418 drm_mode_object_put(obj);
2425 drm_mode_object_put(obj);
2428 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
2433 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2434 ret = drm_atomic_check_only(state);
2435 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2436 ret = drm_atomic_nonblocking_commit(state);
2438 if (unlikely(drm_debug & DRM_UT_STATE))
2439 drm_atomic_print_state(state);
2441 ret = drm_atomic_commit(state);
2445 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
2447 if (ret == -EDEADLK) {
2448 drm_atomic_state_clear(state);
2449 ret = drm_modeset_backoff(&ctx);
2454 drm_atomic_state_put(state);
2456 drm_modeset_drop_locks(&ctx);
2457 drm_modeset_acquire_fini(&ctx);