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_plane_helper.h>
34 #include "drm_crtc_internal.h"
37 * drm_atomic_state_default_release -
38 * release memory initialized by drm_atomic_state_init
39 * @state: atomic state
41 * Free all the memory allocated by drm_atomic_state_init.
42 * This is useful for drivers that subclass the atomic state.
44 void drm_atomic_state_default_release(struct drm_atomic_state
*state
)
46 kfree(state
->connectors
);
47 kfree(state
->connector_states
);
49 kfree(state
->crtc_states
);
51 kfree(state
->plane_states
);
53 EXPORT_SYMBOL(drm_atomic_state_default_release
);
56 * drm_atomic_state_init - init new atomic state
58 * @state: atomic state
60 * Default implementation for filling in a new atomic state.
61 * This is useful for drivers that subclass the atomic state.
64 drm_atomic_state_init(struct drm_device
*dev
, struct drm_atomic_state
*state
)
66 /* TODO legacy paths should maybe do a better job about
67 * setting this appropriately?
69 state
->allow_modeset
= true;
71 state
->crtcs
= kcalloc(dev
->mode_config
.num_crtc
,
72 sizeof(*state
->crtcs
), GFP_KERNEL
);
75 state
->crtc_states
= kcalloc(dev
->mode_config
.num_crtc
,
76 sizeof(*state
->crtc_states
), GFP_KERNEL
);
77 if (!state
->crtc_states
)
79 state
->planes
= kcalloc(dev
->mode_config
.num_total_plane
,
80 sizeof(*state
->planes
), GFP_KERNEL
);
83 state
->plane_states
= kcalloc(dev
->mode_config
.num_total_plane
,
84 sizeof(*state
->plane_states
), GFP_KERNEL
);
85 if (!state
->plane_states
)
90 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state
);
94 drm_atomic_state_default_release(state
);
97 EXPORT_SYMBOL(drm_atomic_state_init
);
100 * drm_atomic_state_alloc - allocate atomic state
103 * This allocates an empty atomic state to track updates.
105 struct drm_atomic_state
*
106 drm_atomic_state_alloc(struct drm_device
*dev
)
108 struct drm_mode_config
*config
= &dev
->mode_config
;
109 struct drm_atomic_state
*state
;
111 if (!config
->funcs
->atomic_state_alloc
) {
112 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
115 if (drm_atomic_state_init(dev
, state
) < 0) {
122 return config
->funcs
->atomic_state_alloc(dev
);
124 EXPORT_SYMBOL(drm_atomic_state_alloc
);
127 * drm_atomic_state_default_clear - clear base atomic state
128 * @state: atomic state
130 * Default implementation for clearing atomic state.
131 * This is useful for drivers that subclass the atomic state.
133 void drm_atomic_state_default_clear(struct drm_atomic_state
*state
)
135 struct drm_device
*dev
= state
->dev
;
136 struct drm_mode_config
*config
= &dev
->mode_config
;
139 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state
);
141 for (i
= 0; i
< state
->num_connector
; i
++) {
142 struct drm_connector
*connector
= state
->connectors
[i
];
147 connector
->funcs
->atomic_destroy_state(connector
,
148 state
->connector_states
[i
]);
149 state
->connectors
[i
] = NULL
;
150 state
->connector_states
[i
] = NULL
;
151 drm_connector_unreference(connector
);
154 for (i
= 0; i
< config
->num_crtc
; i
++) {
155 struct drm_crtc
*crtc
= state
->crtcs
[i
];
160 crtc
->funcs
->atomic_destroy_state(crtc
,
161 state
->crtc_states
[i
]);
162 state
->crtcs
[i
] = NULL
;
163 state
->crtc_states
[i
] = NULL
;
166 for (i
= 0; i
< config
->num_total_plane
; i
++) {
167 struct drm_plane
*plane
= state
->planes
[i
];
172 plane
->funcs
->atomic_destroy_state(plane
,
173 state
->plane_states
[i
]);
174 state
->planes
[i
] = NULL
;
175 state
->plane_states
[i
] = NULL
;
178 EXPORT_SYMBOL(drm_atomic_state_default_clear
);
181 * drm_atomic_state_clear - clear state object
182 * @state: atomic state
184 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
185 * all locks. So someone else could sneak in and change the current modeset
186 * configuration. Which means that all the state assembled in @state is no
187 * longer an atomic update to the current state, but to some arbitrary earlier
188 * state. Which could break assumptions the driver's ->atomic_check likely
191 * Hence we must clear all cached state and completely start over, using this
194 void drm_atomic_state_clear(struct drm_atomic_state
*state
)
196 struct drm_device
*dev
= state
->dev
;
197 struct drm_mode_config
*config
= &dev
->mode_config
;
199 if (config
->funcs
->atomic_state_clear
)
200 config
->funcs
->atomic_state_clear(state
);
202 drm_atomic_state_default_clear(state
);
204 EXPORT_SYMBOL(drm_atomic_state_clear
);
207 * drm_atomic_state_free - free all memory for an atomic state
208 * @state: atomic state to deallocate
210 * This frees all memory associated with an atomic state, including all the
211 * per-object state for planes, crtcs and connectors.
213 void drm_atomic_state_free(struct drm_atomic_state
*state
)
215 struct drm_device
*dev
;
216 struct drm_mode_config
*config
;
222 config
= &dev
->mode_config
;
224 drm_atomic_state_clear(state
);
226 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state
);
228 if (config
->funcs
->atomic_state_free
) {
229 config
->funcs
->atomic_state_free(state
);
231 drm_atomic_state_default_release(state
);
235 EXPORT_SYMBOL(drm_atomic_state_free
);
238 * drm_atomic_get_crtc_state - get crtc state
239 * @state: global atomic state object
240 * @crtc: crtc to get state object for
242 * This function returns the crtc state for the given crtc, allocating it if
243 * needed. It will also grab the relevant crtc lock to make sure that the state
248 * Either the allocated state or the error code encoded into the pointer. When
249 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
250 * entire atomic sequence must be restarted. All other errors are fatal.
252 struct drm_crtc_state
*
253 drm_atomic_get_crtc_state(struct drm_atomic_state
*state
,
254 struct drm_crtc
*crtc
)
256 int ret
, index
= drm_crtc_index(crtc
);
257 struct drm_crtc_state
*crtc_state
;
259 WARN_ON(!state
->acquire_ctx
);
261 crtc_state
= drm_atomic_get_existing_crtc_state(state
, crtc
);
265 ret
= drm_modeset_lock(&crtc
->mutex
, state
->acquire_ctx
);
269 crtc_state
= crtc
->funcs
->atomic_duplicate_state(crtc
);
271 return ERR_PTR(-ENOMEM
);
273 state
->crtc_states
[index
] = crtc_state
;
274 state
->crtcs
[index
] = crtc
;
275 crtc_state
->state
= state
;
277 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
278 crtc
->base
.id
, crtc
->name
, crtc_state
, state
);
282 EXPORT_SYMBOL(drm_atomic_get_crtc_state
);
285 * drm_atomic_set_mode_for_crtc - set mode for CRTC
286 * @state: the CRTC whose incoming state to update
287 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
289 * Set a mode (originating from the kernel) on the desired CRTC state. Does
290 * not change any other state properties, including enable, active, or
294 * Zero on success, error code on failure. Cannot return -EDEADLK.
296 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state
*state
,
297 struct drm_display_mode
*mode
)
299 struct drm_mode_modeinfo umode
;
301 /* Early return for no change. */
302 if (mode
&& memcmp(&state
->mode
, mode
, sizeof(*mode
)) == 0)
305 drm_property_unreference_blob(state
->mode_blob
);
306 state
->mode_blob
= NULL
;
309 drm_mode_convert_to_umode(&umode
, mode
);
311 drm_property_create_blob(state
->crtc
->dev
,
314 if (IS_ERR(state
->mode_blob
))
315 return PTR_ERR(state
->mode_blob
);
317 drm_mode_copy(&state
->mode
, mode
);
318 state
->enable
= true;
319 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
322 memset(&state
->mode
, 0, sizeof(state
->mode
));
323 state
->enable
= false;
324 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
330 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc
);
333 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
334 * @state: the CRTC whose incoming state to update
335 * @blob: pointer to blob property to use for mode
337 * Set a mode (originating from a blob property) on the desired CRTC state.
338 * This function will take a reference on the blob property for the CRTC state,
339 * and release the reference held on the state's existing mode property, if any
343 * Zero on success, error code on failure. Cannot return -EDEADLK.
345 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state
*state
,
346 struct drm_property_blob
*blob
)
348 if (blob
== state
->mode_blob
)
351 drm_property_unreference_blob(state
->mode_blob
);
352 state
->mode_blob
= NULL
;
354 memset(&state
->mode
, 0, sizeof(state
->mode
));
357 if (blob
->length
!= sizeof(struct drm_mode_modeinfo
) ||
358 drm_mode_convert_umode(&state
->mode
,
359 (const struct drm_mode_modeinfo
*)
363 state
->mode_blob
= drm_property_reference_blob(blob
);
364 state
->enable
= true;
365 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
366 state
->mode
.name
, state
);
368 state
->enable
= false;
369 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
375 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc
);
378 * drm_atomic_replace_property_blob - replace a blob property
379 * @blob: a pointer to the member blob to be replaced
380 * @new_blob: the new blob to replace with
381 * @replaced: whether the blob has been replaced
384 * Zero on success, error code on failure
387 drm_atomic_replace_property_blob(struct drm_property_blob
**blob
,
388 struct drm_property_blob
*new_blob
,
391 struct drm_property_blob
*old_blob
= *blob
;
393 if (old_blob
== new_blob
)
397 drm_property_unreference_blob(old_blob
);
399 drm_property_reference_blob(new_blob
);
407 drm_atomic_replace_property_blob_from_id(struct drm_crtc
*crtc
,
408 struct drm_property_blob
**blob
,
410 ssize_t expected_size
,
413 struct drm_device
*dev
= crtc
->dev
;
414 struct drm_property_blob
*new_blob
= NULL
;
417 new_blob
= drm_property_lookup_blob(dev
, blob_id
);
418 if (new_blob
== NULL
)
420 if (expected_size
> 0 && expected_size
!= new_blob
->length
)
424 drm_atomic_replace_property_blob(blob
, new_blob
, replaced
);
430 * drm_atomic_crtc_set_property - set property on CRTC
431 * @crtc: the drm CRTC to set a property on
432 * @state: the state object to update with the new property value
433 * @property: the property to set
434 * @val: the new property value
436 * Use this instead of calling crtc->atomic_set_property directly.
437 * This function handles generic/core properties and calls out to
438 * driver's ->atomic_set_property() for driver properties. To ensure
439 * consistent behavior you must call this function rather than the
440 * driver hook directly.
443 * Zero on success, error code on failure
445 int drm_atomic_crtc_set_property(struct drm_crtc
*crtc
,
446 struct drm_crtc_state
*state
, struct drm_property
*property
,
449 struct drm_device
*dev
= crtc
->dev
;
450 struct drm_mode_config
*config
= &dev
->mode_config
;
451 bool replaced
= false;
454 if (property
== config
->prop_active
)
456 else if (property
== config
->prop_mode_id
) {
457 struct drm_property_blob
*mode
=
458 drm_property_lookup_blob(dev
, val
);
459 ret
= drm_atomic_set_mode_prop_for_crtc(state
, mode
);
460 drm_property_unreference_blob(mode
);
462 } else if (property
== config
->degamma_lut_property
) {
463 ret
= drm_atomic_replace_property_blob_from_id(crtc
,
468 state
->color_mgmt_changed
= replaced
;
470 } else if (property
== config
->ctm_property
) {
471 ret
= drm_atomic_replace_property_blob_from_id(crtc
,
474 sizeof(struct drm_color_ctm
),
476 state
->color_mgmt_changed
= replaced
;
478 } else if (property
== config
->gamma_lut_property
) {
479 ret
= drm_atomic_replace_property_blob_from_id(crtc
,
484 state
->color_mgmt_changed
= replaced
;
486 } else if (crtc
->funcs
->atomic_set_property
)
487 return crtc
->funcs
->atomic_set_property(crtc
, state
, property
, val
);
493 EXPORT_SYMBOL(drm_atomic_crtc_set_property
);
496 * drm_atomic_crtc_get_property - get property value from CRTC state
497 * @crtc: the drm CRTC to set a property on
498 * @state: the state object to get the property value from
499 * @property: the property to set
500 * @val: return location for the property value
502 * This function handles generic/core properties and calls out to
503 * driver's ->atomic_get_property() for driver properties. To ensure
504 * consistent behavior you must call this function rather than the
505 * driver hook directly.
508 * Zero on success, error code on failure
511 drm_atomic_crtc_get_property(struct drm_crtc
*crtc
,
512 const struct drm_crtc_state
*state
,
513 struct drm_property
*property
, uint64_t *val
)
515 struct drm_device
*dev
= crtc
->dev
;
516 struct drm_mode_config
*config
= &dev
->mode_config
;
518 if (property
== config
->prop_active
)
519 *val
= state
->active
;
520 else if (property
== config
->prop_mode_id
)
521 *val
= (state
->mode_blob
) ? state
->mode_blob
->base
.id
: 0;
522 else if (property
== config
->degamma_lut_property
)
523 *val
= (state
->degamma_lut
) ? state
->degamma_lut
->base
.id
: 0;
524 else if (property
== config
->ctm_property
)
525 *val
= (state
->ctm
) ? state
->ctm
->base
.id
: 0;
526 else if (property
== config
->gamma_lut_property
)
527 *val
= (state
->gamma_lut
) ? state
->gamma_lut
->base
.id
: 0;
528 else if (crtc
->funcs
->atomic_get_property
)
529 return crtc
->funcs
->atomic_get_property(crtc
, state
, property
, val
);
537 * drm_atomic_crtc_check - check crtc state
538 * @crtc: crtc to check
539 * @state: crtc state to check
541 * Provides core sanity checks for crtc state.
544 * Zero on success, error code on failure
546 static int drm_atomic_crtc_check(struct drm_crtc
*crtc
,
547 struct drm_crtc_state
*state
)
549 /* NOTE: we explicitly don't enforce constraints such as primary
550 * layer covering entire screen, since that is something we want
551 * to allow (on hw that supports it). For hw that does not, it
552 * should be checked in driver's crtc->atomic_check() vfunc.
554 * TODO: Add generic modeset state checks once we support those.
557 if (state
->active
&& !state
->enable
) {
558 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
559 crtc
->base
.id
, crtc
->name
);
563 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
564 * as this is a kernel-internal detail that userspace should never
565 * be able to trigger. */
566 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
567 WARN_ON(state
->enable
&& !state
->mode_blob
)) {
568 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
569 crtc
->base
.id
, crtc
->name
);
573 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
574 WARN_ON(!state
->enable
&& state
->mode_blob
)) {
575 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
576 crtc
->base
.id
, crtc
->name
);
581 * Reject event generation for when a CRTC is off and stays off.
582 * It wouldn't be hard to implement this, but userspace has a track
583 * record of happily burning through 100% cpu (or worse, crash) when the
584 * display pipe is suspended. To avoid all that fun just reject updates
585 * that ask for events since likely that indicates a bug in the
586 * compositor's drawing loop. This is consistent with the vblank IOCTL
587 * and legacy page_flip IOCTL which also reject service on a disabled
590 if (state
->event
&& !state
->active
&& !crtc
->state
->active
) {
591 DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event but off\n",
600 * drm_atomic_get_plane_state - get plane state
601 * @state: global atomic state object
602 * @plane: plane to get state object for
604 * This function returns the plane state for the given plane, allocating it if
605 * needed. It will also grab the relevant plane lock to make sure that the state
610 * Either the allocated state or the error code encoded into the pointer. When
611 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
612 * entire atomic sequence must be restarted. All other errors are fatal.
614 struct drm_plane_state
*
615 drm_atomic_get_plane_state(struct drm_atomic_state
*state
,
616 struct drm_plane
*plane
)
618 int ret
, index
= drm_plane_index(plane
);
619 struct drm_plane_state
*plane_state
;
621 WARN_ON(!state
->acquire_ctx
);
623 plane_state
= drm_atomic_get_existing_plane_state(state
, plane
);
627 ret
= drm_modeset_lock(&plane
->mutex
, state
->acquire_ctx
);
631 plane_state
= plane
->funcs
->atomic_duplicate_state(plane
);
633 return ERR_PTR(-ENOMEM
);
635 state
->plane_states
[index
] = plane_state
;
636 state
->planes
[index
] = plane
;
637 plane_state
->state
= state
;
639 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
640 plane
->base
.id
, plane
->name
, plane_state
, state
);
642 if (plane_state
->crtc
) {
643 struct drm_crtc_state
*crtc_state
;
645 crtc_state
= drm_atomic_get_crtc_state(state
,
647 if (IS_ERR(crtc_state
))
648 return ERR_CAST(crtc_state
);
653 EXPORT_SYMBOL(drm_atomic_get_plane_state
);
656 * drm_atomic_plane_set_property - set property on plane
657 * @plane: the drm plane to set a property on
658 * @state: the state object to update with the new property value
659 * @property: the property to set
660 * @val: the new property value
662 * Use this instead of calling plane->atomic_set_property directly.
663 * This function handles generic/core properties and calls out to
664 * driver's ->atomic_set_property() for driver properties. To ensure
665 * consistent behavior you must call this function rather than the
666 * driver hook directly.
669 * Zero on success, error code on failure
671 int drm_atomic_plane_set_property(struct drm_plane
*plane
,
672 struct drm_plane_state
*state
, struct drm_property
*property
,
675 struct drm_device
*dev
= plane
->dev
;
676 struct drm_mode_config
*config
= &dev
->mode_config
;
678 if (property
== config
->prop_fb_id
) {
679 struct drm_framebuffer
*fb
= drm_framebuffer_lookup(dev
, val
);
680 drm_atomic_set_fb_for_plane(state
, fb
);
682 drm_framebuffer_unreference(fb
);
683 } else if (property
== config
->prop_crtc_id
) {
684 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
685 return drm_atomic_set_crtc_for_plane(state
, crtc
);
686 } else if (property
== config
->prop_crtc_x
) {
687 state
->crtc_x
= U642I64(val
);
688 } else if (property
== config
->prop_crtc_y
) {
689 state
->crtc_y
= U642I64(val
);
690 } else if (property
== config
->prop_crtc_w
) {
692 } else if (property
== config
->prop_crtc_h
) {
694 } else if (property
== config
->prop_src_x
) {
696 } else if (property
== config
->prop_src_y
) {
698 } else if (property
== config
->prop_src_w
) {
700 } else if (property
== config
->prop_src_h
) {
702 } else if (property
== config
->rotation_property
) {
703 state
->rotation
= val
;
704 } else if (plane
->funcs
->atomic_set_property
) {
705 return plane
->funcs
->atomic_set_property(plane
, state
,
713 EXPORT_SYMBOL(drm_atomic_plane_set_property
);
716 * drm_atomic_plane_get_property - get property value from plane state
717 * @plane: the drm plane to set a property on
718 * @state: the state object to get the property value from
719 * @property: the property to set
720 * @val: return location for the property value
722 * This function handles generic/core properties and calls out to
723 * driver's ->atomic_get_property() for driver properties. To ensure
724 * consistent behavior you must call this function rather than the
725 * driver hook directly.
728 * Zero on success, error code on failure
731 drm_atomic_plane_get_property(struct drm_plane
*plane
,
732 const struct drm_plane_state
*state
,
733 struct drm_property
*property
, uint64_t *val
)
735 struct drm_device
*dev
= plane
->dev
;
736 struct drm_mode_config
*config
= &dev
->mode_config
;
738 if (property
== config
->prop_fb_id
) {
739 *val
= (state
->fb
) ? state
->fb
->base
.id
: 0;
740 } else if (property
== config
->prop_crtc_id
) {
741 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
742 } else if (property
== config
->prop_crtc_x
) {
743 *val
= I642U64(state
->crtc_x
);
744 } else if (property
== config
->prop_crtc_y
) {
745 *val
= I642U64(state
->crtc_y
);
746 } else if (property
== config
->prop_crtc_w
) {
747 *val
= state
->crtc_w
;
748 } else if (property
== config
->prop_crtc_h
) {
749 *val
= state
->crtc_h
;
750 } else if (property
== config
->prop_src_x
) {
752 } else if (property
== config
->prop_src_y
) {
754 } else if (property
== config
->prop_src_w
) {
756 } else if (property
== config
->prop_src_h
) {
758 } else if (property
== config
->rotation_property
) {
759 *val
= state
->rotation
;
760 } else if (plane
->funcs
->atomic_get_property
) {
761 return plane
->funcs
->atomic_get_property(plane
, state
, property
, val
);
770 plane_switching_crtc(struct drm_atomic_state
*state
,
771 struct drm_plane
*plane
,
772 struct drm_plane_state
*plane_state
)
774 if (!plane
->state
->crtc
|| !plane_state
->crtc
)
777 if (plane
->state
->crtc
== plane_state
->crtc
)
780 /* This could be refined, but currently there's no helper or driver code
781 * to implement direct switching of active planes nor userspace to take
782 * advantage of more direct plane switching without the intermediate
789 * drm_atomic_plane_check - check plane state
790 * @plane: plane to check
791 * @state: plane state to check
793 * Provides core sanity checks for plane state.
796 * Zero on success, error code on failure
798 static int drm_atomic_plane_check(struct drm_plane
*plane
,
799 struct drm_plane_state
*state
)
801 unsigned int fb_width
, fb_height
;
804 /* either *both* CRTC and FB must be set, or neither */
805 if (WARN_ON(state
->crtc
&& !state
->fb
)) {
806 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
808 } else if (WARN_ON(state
->fb
&& !state
->crtc
)) {
809 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
813 /* if disabled, we don't care about the rest of the state: */
817 /* Check whether this plane is usable on this CRTC */
818 if (!(plane
->possible_crtcs
& drm_crtc_mask(state
->crtc
))) {
819 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
823 /* Check whether this plane supports the fb pixel format. */
824 ret
= drm_plane_check_pixel_format(plane
, state
->fb
->pixel_format
);
826 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
827 drm_get_format_name(state
->fb
->pixel_format
));
831 /* Give drivers some help against integer overflows */
832 if (state
->crtc_w
> INT_MAX
||
833 state
->crtc_x
> INT_MAX
- (int32_t) state
->crtc_w
||
834 state
->crtc_h
> INT_MAX
||
835 state
->crtc_y
> INT_MAX
- (int32_t) state
->crtc_h
) {
836 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
837 state
->crtc_w
, state
->crtc_h
,
838 state
->crtc_x
, state
->crtc_y
);
842 fb_width
= state
->fb
->width
<< 16;
843 fb_height
= state
->fb
->height
<< 16;
845 /* Make sure source coordinates are inside the fb. */
846 if (state
->src_w
> fb_width
||
847 state
->src_x
> fb_width
- state
->src_w
||
848 state
->src_h
> fb_height
||
849 state
->src_y
> fb_height
- state
->src_h
) {
850 DRM_DEBUG_ATOMIC("Invalid source coordinates "
851 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
852 state
->src_w
>> 16, ((state
->src_w
& 0xffff) * 15625) >> 10,
853 state
->src_h
>> 16, ((state
->src_h
& 0xffff) * 15625) >> 10,
854 state
->src_x
>> 16, ((state
->src_x
& 0xffff) * 15625) >> 10,
855 state
->src_y
>> 16, ((state
->src_y
& 0xffff) * 15625) >> 10);
859 if (plane_switching_crtc(state
->state
, plane
, state
)) {
860 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
861 plane
->base
.id
, plane
->name
);
869 * drm_atomic_get_connector_state - get connector state
870 * @state: global atomic state object
871 * @connector: connector to get state object for
873 * This function returns the connector state for the given connector,
874 * allocating it if needed. It will also grab the relevant connector lock to
875 * make sure that the state is consistent.
879 * Either the allocated state or the error code encoded into the pointer. When
880 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
881 * entire atomic sequence must be restarted. All other errors are fatal.
883 struct drm_connector_state
*
884 drm_atomic_get_connector_state(struct drm_atomic_state
*state
,
885 struct drm_connector
*connector
)
888 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
889 struct drm_connector_state
*connector_state
;
891 WARN_ON(!state
->acquire_ctx
);
893 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
897 index
= drm_connector_index(connector
);
899 if (index
>= state
->num_connector
) {
900 struct drm_connector
**c
;
901 struct drm_connector_state
**cs
;
902 int alloc
= max(index
+ 1, config
->num_connector
);
904 c
= krealloc(state
->connectors
, alloc
* sizeof(*state
->connectors
), GFP_KERNEL
);
906 return ERR_PTR(-ENOMEM
);
908 state
->connectors
= c
;
909 memset(&state
->connectors
[state
->num_connector
], 0,
910 sizeof(*state
->connectors
) * (alloc
- state
->num_connector
));
912 cs
= krealloc(state
->connector_states
, alloc
* sizeof(*state
->connector_states
), GFP_KERNEL
);
914 return ERR_PTR(-ENOMEM
);
916 state
->connector_states
= cs
;
917 memset(&state
->connector_states
[state
->num_connector
], 0,
918 sizeof(*state
->connector_states
) * (alloc
- state
->num_connector
));
919 state
->num_connector
= alloc
;
922 if (state
->connector_states
[index
])
923 return state
->connector_states
[index
];
925 connector_state
= connector
->funcs
->atomic_duplicate_state(connector
);
926 if (!connector_state
)
927 return ERR_PTR(-ENOMEM
);
929 drm_connector_reference(connector
);
930 state
->connector_states
[index
] = connector_state
;
931 state
->connectors
[index
] = connector
;
932 connector_state
->state
= state
;
934 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n",
935 connector
->base
.id
, connector_state
, state
);
937 if (connector_state
->crtc
) {
938 struct drm_crtc_state
*crtc_state
;
940 crtc_state
= drm_atomic_get_crtc_state(state
,
941 connector_state
->crtc
);
942 if (IS_ERR(crtc_state
))
943 return ERR_CAST(crtc_state
);
946 return connector_state
;
948 EXPORT_SYMBOL(drm_atomic_get_connector_state
);
951 * drm_atomic_connector_set_property - set property on connector.
952 * @connector: the drm connector to set a property on
953 * @state: the state object to update with the new property value
954 * @property: the property to set
955 * @val: the new property value
957 * Use this instead of calling connector->atomic_set_property directly.
958 * This function handles generic/core properties and calls out to
959 * driver's ->atomic_set_property() for driver properties. To ensure
960 * consistent behavior you must call this function rather than the
961 * driver hook directly.
964 * Zero on success, error code on failure
966 int drm_atomic_connector_set_property(struct drm_connector
*connector
,
967 struct drm_connector_state
*state
, struct drm_property
*property
,
970 struct drm_device
*dev
= connector
->dev
;
971 struct drm_mode_config
*config
= &dev
->mode_config
;
973 if (property
== config
->prop_crtc_id
) {
974 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
975 return drm_atomic_set_crtc_for_connector(state
, crtc
);
976 } else if (property
== config
->dpms_property
) {
977 /* setting DPMS property requires special handling, which
978 * is done in legacy setprop path for us. Disallow (for
979 * now?) atomic writes to DPMS property:
982 } else if (connector
->funcs
->atomic_set_property
) {
983 return connector
->funcs
->atomic_set_property(connector
,
984 state
, property
, val
);
989 EXPORT_SYMBOL(drm_atomic_connector_set_property
);
992 * drm_atomic_connector_get_property - get property value from connector state
993 * @connector: the drm connector to set a property on
994 * @state: the state object to get the property value from
995 * @property: the property to set
996 * @val: return location for the property value
998 * This function handles generic/core properties and calls out to
999 * driver's ->atomic_get_property() for driver properties. To ensure
1000 * consistent behavior you must call this function rather than the
1001 * driver hook directly.
1004 * Zero on success, error code on failure
1007 drm_atomic_connector_get_property(struct drm_connector
*connector
,
1008 const struct drm_connector_state
*state
,
1009 struct drm_property
*property
, uint64_t *val
)
1011 struct drm_device
*dev
= connector
->dev
;
1012 struct drm_mode_config
*config
= &dev
->mode_config
;
1014 if (property
== config
->prop_crtc_id
) {
1015 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
1016 } else if (property
== config
->dpms_property
) {
1017 *val
= connector
->dpms
;
1018 } else if (connector
->funcs
->atomic_get_property
) {
1019 return connector
->funcs
->atomic_get_property(connector
,
1020 state
, property
, val
);
1028 int drm_atomic_get_property(struct drm_mode_object
*obj
,
1029 struct drm_property
*property
, uint64_t *val
)
1031 struct drm_device
*dev
= property
->dev
;
1034 switch (obj
->type
) {
1035 case DRM_MODE_OBJECT_CONNECTOR
: {
1036 struct drm_connector
*connector
= obj_to_connector(obj
);
1037 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
1038 ret
= drm_atomic_connector_get_property(connector
,
1039 connector
->state
, property
, val
);
1042 case DRM_MODE_OBJECT_CRTC
: {
1043 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
1044 WARN_ON(!drm_modeset_is_locked(&crtc
->mutex
));
1045 ret
= drm_atomic_crtc_get_property(crtc
,
1046 crtc
->state
, property
, val
);
1049 case DRM_MODE_OBJECT_PLANE
: {
1050 struct drm_plane
*plane
= obj_to_plane(obj
);
1051 WARN_ON(!drm_modeset_is_locked(&plane
->mutex
));
1052 ret
= drm_atomic_plane_get_property(plane
,
1053 plane
->state
, property
, val
);
1065 * drm_atomic_set_crtc_for_plane - set crtc for plane
1066 * @plane_state: the plane whose incoming state to update
1067 * @crtc: crtc to use for the plane
1069 * Changing the assigned crtc for a plane requires us to grab the lock and state
1070 * for the new crtc, as needed. This function takes care of all these details
1071 * besides updating the pointer in the state object itself.
1074 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1075 * then the w/w mutex code has detected a deadlock and the entire atomic
1076 * sequence must be restarted. All other errors are fatal.
1079 drm_atomic_set_crtc_for_plane(struct drm_plane_state
*plane_state
,
1080 struct drm_crtc
*crtc
)
1082 struct drm_plane
*plane
= plane_state
->plane
;
1083 struct drm_crtc_state
*crtc_state
;
1085 if (plane_state
->crtc
) {
1086 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
1088 if (WARN_ON(IS_ERR(crtc_state
)))
1089 return PTR_ERR(crtc_state
);
1091 crtc_state
->plane_mask
&= ~(1 << drm_plane_index(plane
));
1094 plane_state
->crtc
= crtc
;
1097 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
1099 if (IS_ERR(crtc_state
))
1100 return PTR_ERR(crtc_state
);
1101 crtc_state
->plane_mask
|= (1 << drm_plane_index(plane
));
1105 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1106 plane_state
, crtc
->base
.id
, crtc
->name
);
1108 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1113 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane
);
1116 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1117 * @plane_state: atomic state object for the plane
1118 * @fb: fb to use for the plane
1120 * Changing the assigned framebuffer for a plane requires us to grab a reference
1121 * to the new fb and drop the reference to the old fb, if there is one. This
1122 * function takes care of all these details besides updating the pointer in the
1123 * state object itself.
1126 drm_atomic_set_fb_for_plane(struct drm_plane_state
*plane_state
,
1127 struct drm_framebuffer
*fb
)
1129 if (plane_state
->fb
)
1130 drm_framebuffer_unreference(plane_state
->fb
);
1132 drm_framebuffer_reference(fb
);
1133 plane_state
->fb
= fb
;
1136 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1137 fb
->base
.id
, plane_state
);
1139 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1142 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane
);
1145 * drm_atomic_set_crtc_for_connector - set crtc for connector
1146 * @conn_state: atomic state object for the connector
1147 * @crtc: crtc to use for the connector
1149 * Changing the assigned crtc for a connector requires us to grab the lock and
1150 * state for the new crtc, as needed. This function takes care of all these
1151 * details besides updating the pointer in the state object itself.
1154 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1155 * then the w/w mutex code has detected a deadlock and the entire atomic
1156 * sequence must be restarted. All other errors are fatal.
1159 drm_atomic_set_crtc_for_connector(struct drm_connector_state
*conn_state
,
1160 struct drm_crtc
*crtc
)
1162 struct drm_crtc_state
*crtc_state
;
1164 if (conn_state
->crtc
== crtc
)
1167 if (conn_state
->crtc
) {
1168 crtc_state
= drm_atomic_get_existing_crtc_state(conn_state
->state
,
1171 crtc_state
->connector_mask
&=
1172 ~(1 << drm_connector_index(conn_state
->connector
));
1174 drm_connector_unreference(conn_state
->connector
);
1175 conn_state
->crtc
= NULL
;
1179 crtc_state
= drm_atomic_get_crtc_state(conn_state
->state
, crtc
);
1180 if (IS_ERR(crtc_state
))
1181 return PTR_ERR(crtc_state
);
1183 crtc_state
->connector_mask
|=
1184 1 << drm_connector_index(conn_state
->connector
);
1186 drm_connector_reference(conn_state
->connector
);
1187 conn_state
->crtc
= crtc
;
1189 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1190 conn_state
, crtc
->base
.id
, crtc
->name
);
1192 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1198 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector
);
1201 * drm_atomic_add_affected_connectors - add connectors for crtc
1202 * @state: atomic state
1205 * This function walks the current configuration and adds all connectors
1206 * currently using @crtc to the atomic configuration @state. Note that this
1207 * function must acquire the connection mutex. This can potentially cause
1208 * unneeded seralization if the update is just for the planes on one crtc. Hence
1209 * drivers and helpers should only call this when really needed (e.g. when a
1210 * full modeset needs to happen due to some change).
1213 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1214 * then the w/w mutex code has detected a deadlock and the entire atomic
1215 * sequence must be restarted. All other errors are fatal.
1218 drm_atomic_add_affected_connectors(struct drm_atomic_state
*state
,
1219 struct drm_crtc
*crtc
)
1221 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1222 struct drm_connector
*connector
;
1223 struct drm_connector_state
*conn_state
;
1226 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
1230 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1231 crtc
->base
.id
, crtc
->name
, state
);
1234 * Changed connectors are already in @state, so only need to look at the
1235 * current configuration.
1237 drm_for_each_connector(connector
, state
->dev
) {
1238 if (connector
->state
->crtc
!= crtc
)
1241 conn_state
= drm_atomic_get_connector_state(state
, connector
);
1242 if (IS_ERR(conn_state
))
1243 return PTR_ERR(conn_state
);
1248 EXPORT_SYMBOL(drm_atomic_add_affected_connectors
);
1251 * drm_atomic_add_affected_planes - add planes for crtc
1252 * @state: atomic state
1255 * This function walks the current configuration and adds all planes
1256 * currently used by @crtc to the atomic configuration @state. This is useful
1257 * when an atomic commit also needs to check all currently enabled plane on
1258 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1259 * to avoid special code to force-enable all planes.
1261 * Since acquiring a plane state will always also acquire the w/w mutex of the
1262 * current CRTC for that plane (if there is any) adding all the plane states for
1263 * a CRTC will not reduce parallism of atomic updates.
1266 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1267 * then the w/w mutex code has detected a deadlock and the entire atomic
1268 * sequence must be restarted. All other errors are fatal.
1271 drm_atomic_add_affected_planes(struct drm_atomic_state
*state
,
1272 struct drm_crtc
*crtc
)
1274 struct drm_plane
*plane
;
1276 WARN_ON(!drm_atomic_get_existing_crtc_state(state
, crtc
));
1278 drm_for_each_plane_mask(plane
, state
->dev
, crtc
->state
->plane_mask
) {
1279 struct drm_plane_state
*plane_state
=
1280 drm_atomic_get_plane_state(state
, plane
);
1282 if (IS_ERR(plane_state
))
1283 return PTR_ERR(plane_state
);
1287 EXPORT_SYMBOL(drm_atomic_add_affected_planes
);
1290 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
1291 * @state: atomic state
1293 * This function should be used by legacy entry points which don't understand
1294 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
1295 * the slowpath completed.
1297 void drm_atomic_legacy_backoff(struct drm_atomic_state
*state
)
1299 struct drm_device
*dev
= state
->dev
;
1300 unsigned crtc_mask
= 0;
1301 struct drm_crtc
*crtc
;
1303 bool global
= false;
1305 drm_for_each_crtc(crtc
, dev
) {
1306 if (crtc
->acquire_ctx
!= state
->acquire_ctx
)
1309 crtc_mask
|= drm_crtc_mask(crtc
);
1310 crtc
->acquire_ctx
= NULL
;
1313 if (WARN_ON(dev
->mode_config
.acquire_ctx
== state
->acquire_ctx
)) {
1316 dev
->mode_config
.acquire_ctx
= NULL
;
1320 drm_modeset_backoff(state
->acquire_ctx
);
1322 ret
= drm_modeset_lock_all_ctx(dev
, state
->acquire_ctx
);
1326 drm_for_each_crtc(crtc
, dev
)
1327 if (drm_crtc_mask(crtc
) & crtc_mask
)
1328 crtc
->acquire_ctx
= state
->acquire_ctx
;
1331 dev
->mode_config
.acquire_ctx
= state
->acquire_ctx
;
1333 EXPORT_SYMBOL(drm_atomic_legacy_backoff
);
1336 * drm_atomic_check_only - check whether a given config would work
1337 * @state: atomic configuration to check
1339 * Note that this function can return -EDEADLK if the driver needed to acquire
1340 * more locks but encountered a deadlock. The caller must then do the usual w/w
1341 * backoff dance and restart. All other errors are fatal.
1344 * 0 on success, negative error code on failure.
1346 int drm_atomic_check_only(struct drm_atomic_state
*state
)
1348 struct drm_device
*dev
= state
->dev
;
1349 struct drm_mode_config
*config
= &dev
->mode_config
;
1350 struct drm_plane
*plane
;
1351 struct drm_plane_state
*plane_state
;
1352 struct drm_crtc
*crtc
;
1353 struct drm_crtc_state
*crtc_state
;
1356 DRM_DEBUG_ATOMIC("checking %p\n", state
);
1358 for_each_plane_in_state(state
, plane
, plane_state
, i
) {
1359 ret
= drm_atomic_plane_check(plane
, plane_state
);
1361 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1362 plane
->base
.id
, plane
->name
);
1367 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1368 ret
= drm_atomic_crtc_check(crtc
, crtc_state
);
1370 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1371 crtc
->base
.id
, crtc
->name
);
1376 if (config
->funcs
->atomic_check
)
1377 ret
= config
->funcs
->atomic_check(state
->dev
, state
);
1379 if (!state
->allow_modeset
) {
1380 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1381 if (drm_atomic_crtc_needs_modeset(crtc_state
)) {
1382 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1383 crtc
->base
.id
, crtc
->name
);
1391 EXPORT_SYMBOL(drm_atomic_check_only
);
1394 * drm_atomic_commit - commit configuration atomically
1395 * @state: atomic configuration to check
1397 * Note that this function can return -EDEADLK if the driver needed to acquire
1398 * more locks but encountered a deadlock. The caller must then do the usual w/w
1399 * backoff dance and restart. All other errors are fatal.
1401 * Also note that on successful execution ownership of @state is transferred
1402 * from the caller of this function to the function itself. The caller must not
1403 * free or in any other way access @state. If the function fails then the caller
1404 * must clean up @state itself.
1407 * 0 on success, negative error code on failure.
1409 int drm_atomic_commit(struct drm_atomic_state
*state
)
1411 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1414 ret
= drm_atomic_check_only(state
);
1418 DRM_DEBUG_ATOMIC("commiting %p\n", state
);
1420 return config
->funcs
->atomic_commit(state
->dev
, state
, false);
1422 EXPORT_SYMBOL(drm_atomic_commit
);
1425 * drm_atomic_nonblocking_commit - atomic&nonblocking configuration commit
1426 * @state: atomic configuration to check
1428 * Note that this function can return -EDEADLK if the driver needed to acquire
1429 * more locks but encountered a deadlock. The caller must then do the usual w/w
1430 * backoff dance and restart. All other errors are fatal.
1432 * Also note that on successful execution ownership of @state is transferred
1433 * from the caller of this function to the function itself. The caller must not
1434 * free or in any other way access @state. If the function fails then the caller
1435 * must clean up @state itself.
1438 * 0 on success, negative error code on failure.
1440 int drm_atomic_nonblocking_commit(struct drm_atomic_state
*state
)
1442 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1445 ret
= drm_atomic_check_only(state
);
1449 DRM_DEBUG_ATOMIC("commiting %p nonblocking\n", state
);
1451 return config
->funcs
->atomic_commit(state
->dev
, state
, true);
1453 EXPORT_SYMBOL(drm_atomic_nonblocking_commit
);
1456 * The big monstor ioctl
1459 static struct drm_pending_vblank_event
*create_vblank_event(
1460 struct drm_device
*dev
, struct drm_file
*file_priv
, uint64_t user_data
)
1462 struct drm_pending_vblank_event
*e
= NULL
;
1465 e
= kzalloc(sizeof *e
, GFP_KERNEL
);
1469 e
->event
.base
.type
= DRM_EVENT_FLIP_COMPLETE
;
1470 e
->event
.base
.length
= sizeof(e
->event
);
1471 e
->event
.user_data
= user_data
;
1473 ret
= drm_event_reserve_init(dev
, file_priv
, &e
->base
, &e
->event
.base
);
1482 static int atomic_set_prop(struct drm_atomic_state
*state
,
1483 struct drm_mode_object
*obj
, struct drm_property
*prop
,
1484 uint64_t prop_value
)
1486 struct drm_mode_object
*ref
;
1489 if (!drm_property_change_valid_get(prop
, prop_value
, &ref
))
1492 switch (obj
->type
) {
1493 case DRM_MODE_OBJECT_CONNECTOR
: {
1494 struct drm_connector
*connector
= obj_to_connector(obj
);
1495 struct drm_connector_state
*connector_state
;
1497 connector_state
= drm_atomic_get_connector_state(state
, connector
);
1498 if (IS_ERR(connector_state
)) {
1499 ret
= PTR_ERR(connector_state
);
1503 ret
= drm_atomic_connector_set_property(connector
,
1504 connector_state
, prop
, prop_value
);
1507 case DRM_MODE_OBJECT_CRTC
: {
1508 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
1509 struct drm_crtc_state
*crtc_state
;
1511 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1512 if (IS_ERR(crtc_state
)) {
1513 ret
= PTR_ERR(crtc_state
);
1517 ret
= drm_atomic_crtc_set_property(crtc
,
1518 crtc_state
, prop
, prop_value
);
1521 case DRM_MODE_OBJECT_PLANE
: {
1522 struct drm_plane
*plane
= obj_to_plane(obj
);
1523 struct drm_plane_state
*plane_state
;
1525 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1526 if (IS_ERR(plane_state
)) {
1527 ret
= PTR_ERR(plane_state
);
1531 ret
= drm_atomic_plane_set_property(plane
,
1532 plane_state
, prop
, prop_value
);
1540 drm_property_change_valid_put(prop
, ref
);
1545 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
1547 * @dev: drm device to check.
1548 * @plane_mask: plane mask for planes that were updated.
1549 * @ret: return value, can be -EDEADLK for a retry.
1551 * Before doing an update plane->old_fb is set to plane->fb,
1552 * but before dropping the locks old_fb needs to be set to NULL
1553 * and plane->fb updated. This is a common operation for each
1554 * atomic update, so this call is split off as a helper.
1556 void drm_atomic_clean_old_fb(struct drm_device
*dev
,
1557 unsigned plane_mask
,
1560 struct drm_plane
*plane
;
1562 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1563 * locks (ie. while it is still safe to deref plane->state). We
1564 * need to do this here because the driver entry points cannot
1565 * distinguish between legacy and atomic ioctls.
1567 drm_for_each_plane_mask(plane
, dev
, plane_mask
) {
1569 struct drm_framebuffer
*new_fb
= plane
->state
->fb
;
1571 drm_framebuffer_reference(new_fb
);
1573 plane
->crtc
= plane
->state
->crtc
;
1576 drm_framebuffer_unreference(plane
->old_fb
);
1578 plane
->old_fb
= NULL
;
1581 EXPORT_SYMBOL(drm_atomic_clean_old_fb
);
1583 int drm_mode_atomic_ioctl(struct drm_device
*dev
,
1584 void *data
, struct drm_file
*file_priv
)
1586 struct drm_mode_atomic
*arg
= data
;
1587 uint32_t __user
*objs_ptr
= (uint32_t __user
*)(unsigned long)(arg
->objs_ptr
);
1588 uint32_t __user
*count_props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->count_props_ptr
);
1589 uint32_t __user
*props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->props_ptr
);
1590 uint64_t __user
*prop_values_ptr
= (uint64_t __user
*)(unsigned long)(arg
->prop_values_ptr
);
1591 unsigned int copied_objs
, copied_props
;
1592 struct drm_atomic_state
*state
;
1593 struct drm_modeset_acquire_ctx ctx
;
1594 struct drm_plane
*plane
;
1595 struct drm_crtc
*crtc
;
1596 struct drm_crtc_state
*crtc_state
;
1597 unsigned plane_mask
;
1601 /* disallow for drivers not supporting atomic: */
1602 if (!drm_core_check_feature(dev
, DRIVER_ATOMIC
))
1605 /* disallow for userspace that has not enabled atomic cap (even
1606 * though this may be a bit overkill, since legacy userspace
1607 * wouldn't know how to call this ioctl)
1609 if (!file_priv
->atomic
)
1612 if (arg
->flags
& ~DRM_MODE_ATOMIC_FLAGS
)
1618 if ((arg
->flags
& DRM_MODE_PAGE_FLIP_ASYNC
) &&
1619 !dev
->mode_config
.async_page_flip
)
1622 /* can't test and expect an event at the same time. */
1623 if ((arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) &&
1624 (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
))
1627 drm_modeset_acquire_init(&ctx
, 0);
1629 state
= drm_atomic_state_alloc(dev
);
1633 state
->acquire_ctx
= &ctx
;
1634 state
->allow_modeset
= !!(arg
->flags
& DRM_MODE_ATOMIC_ALLOW_MODESET
);
1641 for (i
= 0; i
< arg
->count_objs
; i
++) {
1642 uint32_t obj_id
, count_props
;
1643 struct drm_mode_object
*obj
;
1645 if (get_user(obj_id
, objs_ptr
+ copied_objs
)) {
1650 obj
= drm_mode_object_find(dev
, obj_id
, DRM_MODE_OBJECT_ANY
);
1656 if (!obj
->properties
) {
1657 drm_mode_object_unreference(obj
);
1662 if (get_user(count_props
, count_props_ptr
+ copied_objs
)) {
1663 drm_mode_object_unreference(obj
);
1670 for (j
= 0; j
< count_props
; j
++) {
1672 uint64_t prop_value
;
1673 struct drm_property
*prop
;
1675 if (get_user(prop_id
, props_ptr
+ copied_props
)) {
1676 drm_mode_object_unreference(obj
);
1681 prop
= drm_property_find(dev
, prop_id
);
1683 drm_mode_object_unreference(obj
);
1688 if (copy_from_user(&prop_value
,
1689 prop_values_ptr
+ copied_props
,
1690 sizeof(prop_value
))) {
1691 drm_mode_object_unreference(obj
);
1696 ret
= atomic_set_prop(state
, obj
, prop
, prop_value
);
1698 drm_mode_object_unreference(obj
);
1705 if (obj
->type
== DRM_MODE_OBJECT_PLANE
&& count_props
&&
1706 !(arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)) {
1707 plane
= obj_to_plane(obj
);
1708 plane_mask
|= (1 << drm_plane_index(plane
));
1709 plane
->old_fb
= plane
->fb
;
1711 drm_mode_object_unreference(obj
);
1714 if (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1715 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1716 struct drm_pending_vblank_event
*e
;
1718 e
= create_vblank_event(dev
, file_priv
, arg
->user_data
);
1724 crtc_state
->event
= e
;
1728 if (arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) {
1730 * Unlike commit, check_only does not clean up state.
1731 * Below we call drm_atomic_state_free for it.
1733 ret
= drm_atomic_check_only(state
);
1734 } else if (arg
->flags
& DRM_MODE_ATOMIC_NONBLOCK
) {
1735 ret
= drm_atomic_nonblocking_commit(state
);
1737 ret
= drm_atomic_commit(state
);
1741 drm_atomic_clean_old_fb(dev
, plane_mask
, ret
);
1743 if (ret
&& arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1745 * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
1746 * if they weren't, this code should be called on success
1747 * for TEST_ONLY too.
1750 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1751 if (!crtc_state
->event
)
1754 drm_event_cancel_free(dev
, &crtc_state
->event
->base
);
1758 if (ret
== -EDEADLK
) {
1759 drm_atomic_state_clear(state
);
1760 drm_modeset_backoff(&ctx
);
1764 if (ret
|| arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)
1765 drm_atomic_state_free(state
);
1767 drm_modeset_drop_locks(&ctx
);
1768 drm_modeset_acquire_fini(&ctx
);