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_plane_helper.h>
34 * drm_atomic_state_default_release -
35 * release memory initialized by drm_atomic_state_init
36 * @state: atomic state
38 * Free all the memory allocated by drm_atomic_state_init.
39 * This is useful for drivers that subclass the atomic state.
41 void drm_atomic_state_default_release(struct drm_atomic_state
*state
)
43 kfree(state
->connectors
);
44 kfree(state
->connector_states
);
46 kfree(state
->crtc_states
);
48 kfree(state
->plane_states
);
50 EXPORT_SYMBOL(drm_atomic_state_default_release
);
53 * drm_atomic_state_init - init new atomic state
55 * @state: atomic state
57 * Default implementation for filling in a new atomic state.
58 * This is useful for drivers that subclass the atomic state.
61 drm_atomic_state_init(struct drm_device
*dev
, struct drm_atomic_state
*state
)
63 /* TODO legacy paths should maybe do a better job about
64 * setting this appropriately?
66 state
->allow_modeset
= true;
68 state
->crtcs
= kcalloc(dev
->mode_config
.num_crtc
,
69 sizeof(*state
->crtcs
), GFP_KERNEL
);
72 state
->crtc_states
= kcalloc(dev
->mode_config
.num_crtc
,
73 sizeof(*state
->crtc_states
), GFP_KERNEL
);
74 if (!state
->crtc_states
)
76 state
->planes
= kcalloc(dev
->mode_config
.num_total_plane
,
77 sizeof(*state
->planes
), GFP_KERNEL
);
80 state
->plane_states
= kcalloc(dev
->mode_config
.num_total_plane
,
81 sizeof(*state
->plane_states
), GFP_KERNEL
);
82 if (!state
->plane_states
)
87 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state
);
91 drm_atomic_state_default_release(state
);
94 EXPORT_SYMBOL(drm_atomic_state_init
);
97 * drm_atomic_state_alloc - allocate atomic state
100 * This allocates an empty atomic state to track updates.
102 struct drm_atomic_state
*
103 drm_atomic_state_alloc(struct drm_device
*dev
)
105 struct drm_mode_config
*config
= &dev
->mode_config
;
106 struct drm_atomic_state
*state
;
108 if (!config
->funcs
->atomic_state_alloc
) {
109 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
112 if (drm_atomic_state_init(dev
, state
) < 0) {
119 return config
->funcs
->atomic_state_alloc(dev
);
121 EXPORT_SYMBOL(drm_atomic_state_alloc
);
124 * drm_atomic_state_default_clear - clear base atomic state
125 * @state: atomic state
127 * Default implementation for clearing atomic state.
128 * This is useful for drivers that subclass the atomic state.
130 void drm_atomic_state_default_clear(struct drm_atomic_state
*state
)
132 struct drm_device
*dev
= state
->dev
;
133 struct drm_mode_config
*config
= &dev
->mode_config
;
136 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state
);
138 for (i
= 0; i
< state
->num_connector
; i
++) {
139 struct drm_connector
*connector
= state
->connectors
[i
];
145 * FIXME: Async commits can race with connector unplugging and
146 * there's currently nothing that prevents cleanup up state for
147 * deleted connectors. As long as the callback doesn't look at
148 * the connector we'll be fine though, so make sure that's the
149 * case by setting all connector pointers to NULL.
151 state
->connector_states
[i
]->connector
= NULL
;
152 connector
->funcs
->atomic_destroy_state(NULL
,
153 state
->connector_states
[i
]);
154 state
->connectors
[i
] = NULL
;
155 state
->connector_states
[i
] = NULL
;
158 for (i
= 0; i
< config
->num_crtc
; i
++) {
159 struct drm_crtc
*crtc
= state
->crtcs
[i
];
164 crtc
->funcs
->atomic_destroy_state(crtc
,
165 state
->crtc_states
[i
]);
166 state
->crtcs
[i
] = NULL
;
167 state
->crtc_states
[i
] = NULL
;
170 for (i
= 0; i
< config
->num_total_plane
; i
++) {
171 struct drm_plane
*plane
= state
->planes
[i
];
176 plane
->funcs
->atomic_destroy_state(plane
,
177 state
->plane_states
[i
]);
178 state
->planes
[i
] = NULL
;
179 state
->plane_states
[i
] = NULL
;
182 EXPORT_SYMBOL(drm_atomic_state_default_clear
);
185 * drm_atomic_state_clear - clear state object
186 * @state: atomic state
188 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
189 * all locks. So someone else could sneak in and change the current modeset
190 * configuration. Which means that all the state assembled in @state is no
191 * longer an atomic update to the current state, but to some arbitrary earlier
192 * state. Which could break assumptions the driver's ->atomic_check likely
195 * Hence we must clear all cached state and completely start over, using this
198 void drm_atomic_state_clear(struct drm_atomic_state
*state
)
200 struct drm_device
*dev
= state
->dev
;
201 struct drm_mode_config
*config
= &dev
->mode_config
;
203 if (config
->funcs
->atomic_state_clear
)
204 config
->funcs
->atomic_state_clear(state
);
206 drm_atomic_state_default_clear(state
);
208 EXPORT_SYMBOL(drm_atomic_state_clear
);
211 * drm_atomic_state_free - free all memory for an atomic state
212 * @state: atomic state to deallocate
214 * This frees all memory associated with an atomic state, including all the
215 * per-object state for planes, crtcs and connectors.
217 void drm_atomic_state_free(struct drm_atomic_state
*state
)
219 struct drm_device
*dev
;
220 struct drm_mode_config
*config
;
226 config
= &dev
->mode_config
;
228 drm_atomic_state_clear(state
);
230 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state
);
232 if (config
->funcs
->atomic_state_free
) {
233 config
->funcs
->atomic_state_free(state
);
235 drm_atomic_state_default_release(state
);
239 EXPORT_SYMBOL(drm_atomic_state_free
);
242 * drm_atomic_get_crtc_state - get crtc state
243 * @state: global atomic state object
244 * @crtc: crtc to get state object for
246 * This function returns the crtc state for the given crtc, allocating it if
247 * needed. It will also grab the relevant crtc lock to make sure that the state
252 * Either the allocated state or the error code encoded into the pointer. When
253 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
254 * entire atomic sequence must be restarted. All other errors are fatal.
256 struct drm_crtc_state
*
257 drm_atomic_get_crtc_state(struct drm_atomic_state
*state
,
258 struct drm_crtc
*crtc
)
260 int ret
, index
= drm_crtc_index(crtc
);
261 struct drm_crtc_state
*crtc_state
;
263 crtc_state
= drm_atomic_get_existing_crtc_state(state
, crtc
);
267 ret
= drm_modeset_lock(&crtc
->mutex
, state
->acquire_ctx
);
271 crtc_state
= crtc
->funcs
->atomic_duplicate_state(crtc
);
273 return ERR_PTR(-ENOMEM
);
275 state
->crtc_states
[index
] = crtc_state
;
276 state
->crtcs
[index
] = crtc
;
277 crtc_state
->state
= state
;
279 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
280 crtc
->base
.id
, crtc
->name
, crtc_state
, state
);
284 EXPORT_SYMBOL(drm_atomic_get_crtc_state
);
287 * drm_atomic_set_mode_for_crtc - set mode for CRTC
288 * @state: the CRTC whose incoming state to update
289 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
291 * Set a mode (originating from the kernel) on the desired CRTC state. Does
292 * not change any other state properties, including enable, active, or
296 * Zero on success, error code on failure. Cannot return -EDEADLK.
298 int drm_atomic_set_mode_for_crtc(struct drm_crtc_state
*state
,
299 struct drm_display_mode
*mode
)
301 struct drm_mode_modeinfo umode
;
303 /* Early return for no change. */
304 if (mode
&& memcmp(&state
->mode
, mode
, sizeof(*mode
)) == 0)
307 drm_property_unreference_blob(state
->mode_blob
);
308 state
->mode_blob
= NULL
;
311 drm_mode_convert_to_umode(&umode
, mode
);
313 drm_property_create_blob(state
->crtc
->dev
,
316 if (IS_ERR(state
->mode_blob
))
317 return PTR_ERR(state
->mode_blob
);
319 drm_mode_copy(&state
->mode
, mode
);
320 state
->enable
= true;
321 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
324 memset(&state
->mode
, 0, sizeof(state
->mode
));
325 state
->enable
= false;
326 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
332 EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc
);
335 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
336 * @state: the CRTC whose incoming state to update
337 * @blob: pointer to blob property to use for mode
339 * Set a mode (originating from a blob property) on the desired CRTC state.
340 * This function will take a reference on the blob property for the CRTC state,
341 * and release the reference held on the state's existing mode property, if any
345 * Zero on success, error code on failure. Cannot return -EDEADLK.
347 int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state
*state
,
348 struct drm_property_blob
*blob
)
350 if (blob
== state
->mode_blob
)
353 drm_property_unreference_blob(state
->mode_blob
);
354 state
->mode_blob
= NULL
;
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 memset(&state
->mode
, 0, sizeof(state
->mode
));
369 state
->enable
= false;
370 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
376 EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc
);
379 * drm_atomic_crtc_set_property - set property on CRTC
380 * @crtc: the drm CRTC to set a property on
381 * @state: the state object to update with the new property value
382 * @property: the property to set
383 * @val: the new property value
385 * Use this instead of calling crtc->atomic_set_property directly.
386 * This function handles generic/core properties and calls out to
387 * driver's ->atomic_set_property() for driver properties. To ensure
388 * consistent behavior you must call this function rather than the
389 * driver hook directly.
392 * Zero on success, error code on failure
394 int drm_atomic_crtc_set_property(struct drm_crtc
*crtc
,
395 struct drm_crtc_state
*state
, struct drm_property
*property
,
398 struct drm_device
*dev
= crtc
->dev
;
399 struct drm_mode_config
*config
= &dev
->mode_config
;
402 if (property
== config
->prop_active
)
404 else if (property
== config
->prop_mode_id
) {
405 struct drm_property_blob
*mode
=
406 drm_property_lookup_blob(dev
, val
);
407 ret
= drm_atomic_set_mode_prop_for_crtc(state
, mode
);
408 drm_property_unreference_blob(mode
);
411 else if (crtc
->funcs
->atomic_set_property
)
412 return crtc
->funcs
->atomic_set_property(crtc
, state
, property
, val
);
418 EXPORT_SYMBOL(drm_atomic_crtc_set_property
);
421 * drm_atomic_crtc_get_property - get property value from CRTC state
422 * @crtc: the drm CRTC to set a property on
423 * @state: the state object to get the property value from
424 * @property: the property to set
425 * @val: return location for the property value
427 * This function handles generic/core properties and calls out to
428 * driver's ->atomic_get_property() for driver properties. To ensure
429 * consistent behavior you must call this function rather than the
430 * driver hook directly.
433 * Zero on success, error code on failure
436 drm_atomic_crtc_get_property(struct drm_crtc
*crtc
,
437 const struct drm_crtc_state
*state
,
438 struct drm_property
*property
, uint64_t *val
)
440 struct drm_device
*dev
= crtc
->dev
;
441 struct drm_mode_config
*config
= &dev
->mode_config
;
443 if (property
== config
->prop_active
)
444 *val
= state
->active
;
445 else if (property
== config
->prop_mode_id
)
446 *val
= (state
->mode_blob
) ? state
->mode_blob
->base
.id
: 0;
447 else if (crtc
->funcs
->atomic_get_property
)
448 return crtc
->funcs
->atomic_get_property(crtc
, state
, property
, val
);
456 * drm_atomic_crtc_check - check crtc state
457 * @crtc: crtc to check
458 * @state: crtc state to check
460 * Provides core sanity checks for crtc state.
463 * Zero on success, error code on failure
465 static int drm_atomic_crtc_check(struct drm_crtc
*crtc
,
466 struct drm_crtc_state
*state
)
468 /* NOTE: we explicitly don't enforce constraints such as primary
469 * layer covering entire screen, since that is something we want
470 * to allow (on hw that supports it). For hw that does not, it
471 * should be checked in driver's crtc->atomic_check() vfunc.
473 * TODO: Add generic modeset state checks once we support those.
476 if (state
->active
&& !state
->enable
) {
477 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
478 crtc
->base
.id
, crtc
->name
);
482 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
483 * as this is a kernel-internal detail that userspace should never
484 * be able to trigger. */
485 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
486 WARN_ON(state
->enable
&& !state
->mode_blob
)) {
487 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
488 crtc
->base
.id
, crtc
->name
);
492 if (drm_core_check_feature(crtc
->dev
, DRIVER_ATOMIC
) &&
493 WARN_ON(!state
->enable
&& state
->mode_blob
)) {
494 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
495 crtc
->base
.id
, crtc
->name
);
500 * Reject event generation for when a CRTC is off and stays off.
501 * It wouldn't be hard to implement this, but userspace has a track
502 * record of happily burning through 100% cpu (or worse, crash) when the
503 * display pipe is suspended. To avoid all that fun just reject updates
504 * that ask for events since likely that indicates a bug in the
505 * compositor's drawing loop. This is consistent with the vblank IOCTL
506 * and legacy page_flip IOCTL which also reject service on a disabled
509 if (state
->event
&& !state
->active
&& !crtc
->state
->active
) {
510 DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event but off\n",
519 * drm_atomic_get_plane_state - get plane state
520 * @state: global atomic state object
521 * @plane: plane to get state object for
523 * This function returns the plane state for the given plane, allocating it if
524 * needed. It will also grab the relevant plane lock to make sure that the state
529 * Either the allocated state or the error code encoded into the pointer. When
530 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
531 * entire atomic sequence must be restarted. All other errors are fatal.
533 struct drm_plane_state
*
534 drm_atomic_get_plane_state(struct drm_atomic_state
*state
,
535 struct drm_plane
*plane
)
537 int ret
, index
= drm_plane_index(plane
);
538 struct drm_plane_state
*plane_state
;
540 plane_state
= drm_atomic_get_existing_plane_state(state
, plane
);
544 ret
= drm_modeset_lock(&plane
->mutex
, state
->acquire_ctx
);
548 plane_state
= plane
->funcs
->atomic_duplicate_state(plane
);
550 return ERR_PTR(-ENOMEM
);
552 state
->plane_states
[index
] = plane_state
;
553 state
->planes
[index
] = plane
;
554 plane_state
->state
= state
;
556 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
557 plane
->base
.id
, plane
->name
, plane_state
, state
);
559 if (plane_state
->crtc
) {
560 struct drm_crtc_state
*crtc_state
;
562 crtc_state
= drm_atomic_get_crtc_state(state
,
564 if (IS_ERR(crtc_state
))
565 return ERR_CAST(crtc_state
);
570 EXPORT_SYMBOL(drm_atomic_get_plane_state
);
573 * drm_atomic_plane_set_property - set property on plane
574 * @plane: the drm plane to set a property on
575 * @state: the state object to update with the new property value
576 * @property: the property to set
577 * @val: the new property value
579 * Use this instead of calling plane->atomic_set_property directly.
580 * This function handles generic/core properties and calls out to
581 * driver's ->atomic_set_property() for driver properties. To ensure
582 * consistent behavior you must call this function rather than the
583 * driver hook directly.
586 * Zero on success, error code on failure
588 int drm_atomic_plane_set_property(struct drm_plane
*plane
,
589 struct drm_plane_state
*state
, struct drm_property
*property
,
592 struct drm_device
*dev
= plane
->dev
;
593 struct drm_mode_config
*config
= &dev
->mode_config
;
595 if (property
== config
->prop_fb_id
) {
596 struct drm_framebuffer
*fb
= drm_framebuffer_lookup(dev
, val
);
597 drm_atomic_set_fb_for_plane(state
, fb
);
599 drm_framebuffer_unreference(fb
);
600 } else if (property
== config
->prop_crtc_id
) {
601 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
602 return drm_atomic_set_crtc_for_plane(state
, crtc
);
603 } else if (property
== config
->prop_crtc_x
) {
604 state
->crtc_x
= U642I64(val
);
605 } else if (property
== config
->prop_crtc_y
) {
606 state
->crtc_y
= U642I64(val
);
607 } else if (property
== config
->prop_crtc_w
) {
609 } else if (property
== config
->prop_crtc_h
) {
611 } else if (property
== config
->prop_src_x
) {
613 } else if (property
== config
->prop_src_y
) {
615 } else if (property
== config
->prop_src_w
) {
617 } else if (property
== config
->prop_src_h
) {
619 } else if (property
== config
->rotation_property
) {
620 state
->rotation
= val
;
621 } else if (plane
->funcs
->atomic_set_property
) {
622 return plane
->funcs
->atomic_set_property(plane
, state
,
630 EXPORT_SYMBOL(drm_atomic_plane_set_property
);
633 * drm_atomic_plane_get_property - get property value from plane state
634 * @plane: the drm plane to set a property on
635 * @state: the state object to get the property value from
636 * @property: the property to set
637 * @val: return location for the property value
639 * This function handles generic/core properties and calls out to
640 * driver's ->atomic_get_property() for driver properties. To ensure
641 * consistent behavior you must call this function rather than the
642 * driver hook directly.
645 * Zero on success, error code on failure
648 drm_atomic_plane_get_property(struct drm_plane
*plane
,
649 const struct drm_plane_state
*state
,
650 struct drm_property
*property
, uint64_t *val
)
652 struct drm_device
*dev
= plane
->dev
;
653 struct drm_mode_config
*config
= &dev
->mode_config
;
655 if (property
== config
->prop_fb_id
) {
656 *val
= (state
->fb
) ? state
->fb
->base
.id
: 0;
657 } else if (property
== config
->prop_crtc_id
) {
658 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
659 } else if (property
== config
->prop_crtc_x
) {
660 *val
= I642U64(state
->crtc_x
);
661 } else if (property
== config
->prop_crtc_y
) {
662 *val
= I642U64(state
->crtc_y
);
663 } else if (property
== config
->prop_crtc_w
) {
664 *val
= state
->crtc_w
;
665 } else if (property
== config
->prop_crtc_h
) {
666 *val
= state
->crtc_h
;
667 } else if (property
== config
->prop_src_x
) {
669 } else if (property
== config
->prop_src_y
) {
671 } else if (property
== config
->prop_src_w
) {
673 } else if (property
== config
->prop_src_h
) {
675 } else if (property
== config
->rotation_property
) {
676 *val
= state
->rotation
;
677 } else if (plane
->funcs
->atomic_get_property
) {
678 return plane
->funcs
->atomic_get_property(plane
, state
, property
, val
);
687 plane_switching_crtc(struct drm_atomic_state
*state
,
688 struct drm_plane
*plane
,
689 struct drm_plane_state
*plane_state
)
691 if (!plane
->state
->crtc
|| !plane_state
->crtc
)
694 if (plane
->state
->crtc
== plane_state
->crtc
)
697 /* This could be refined, but currently there's no helper or driver code
698 * to implement direct switching of active planes nor userspace to take
699 * advantage of more direct plane switching without the intermediate
706 * drm_atomic_plane_check - check plane state
707 * @plane: plane to check
708 * @state: plane state to check
710 * Provides core sanity checks for plane state.
713 * Zero on success, error code on failure
715 static int drm_atomic_plane_check(struct drm_plane
*plane
,
716 struct drm_plane_state
*state
)
718 unsigned int fb_width
, fb_height
;
721 /* either *both* CRTC and FB must be set, or neither */
722 if (WARN_ON(state
->crtc
&& !state
->fb
)) {
723 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
725 } else if (WARN_ON(state
->fb
&& !state
->crtc
)) {
726 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
730 /* if disabled, we don't care about the rest of the state: */
734 /* Check whether this plane is usable on this CRTC */
735 if (!(plane
->possible_crtcs
& drm_crtc_mask(state
->crtc
))) {
736 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
740 /* Check whether this plane supports the fb pixel format. */
741 ret
= drm_plane_check_pixel_format(plane
, state
->fb
->pixel_format
);
743 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
744 drm_get_format_name(state
->fb
->pixel_format
));
748 /* Give drivers some help against integer overflows */
749 if (state
->crtc_w
> INT_MAX
||
750 state
->crtc_x
> INT_MAX
- (int32_t) state
->crtc_w
||
751 state
->crtc_h
> INT_MAX
||
752 state
->crtc_y
> INT_MAX
- (int32_t) state
->crtc_h
) {
753 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
754 state
->crtc_w
, state
->crtc_h
,
755 state
->crtc_x
, state
->crtc_y
);
759 fb_width
= state
->fb
->width
<< 16;
760 fb_height
= state
->fb
->height
<< 16;
762 /* Make sure source coordinates are inside the fb. */
763 if (state
->src_w
> fb_width
||
764 state
->src_x
> fb_width
- state
->src_w
||
765 state
->src_h
> fb_height
||
766 state
->src_y
> fb_height
- state
->src_h
) {
767 DRM_DEBUG_ATOMIC("Invalid source coordinates "
768 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
769 state
->src_w
>> 16, ((state
->src_w
& 0xffff) * 15625) >> 10,
770 state
->src_h
>> 16, ((state
->src_h
& 0xffff) * 15625) >> 10,
771 state
->src_x
>> 16, ((state
->src_x
& 0xffff) * 15625) >> 10,
772 state
->src_y
>> 16, ((state
->src_y
& 0xffff) * 15625) >> 10);
776 if (plane_switching_crtc(state
->state
, plane
, state
)) {
777 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
778 plane
->base
.id
, plane
->name
);
786 * drm_atomic_get_connector_state - get connector state
787 * @state: global atomic state object
788 * @connector: connector to get state object for
790 * This function returns the connector state for the given connector,
791 * allocating it if needed. It will also grab the relevant connector lock to
792 * make sure that the state is consistent.
796 * Either the allocated state or the error code encoded into the pointer. When
797 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
798 * entire atomic sequence must be restarted. All other errors are fatal.
800 struct drm_connector_state
*
801 drm_atomic_get_connector_state(struct drm_atomic_state
*state
,
802 struct drm_connector
*connector
)
805 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
806 struct drm_connector_state
*connector_state
;
808 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
812 index
= drm_connector_index(connector
);
814 if (index
>= state
->num_connector
) {
815 struct drm_connector
**c
;
816 struct drm_connector_state
**cs
;
817 int alloc
= max(index
+ 1, config
->num_connector
);
819 c
= krealloc(state
->connectors
, alloc
* sizeof(*state
->connectors
), GFP_KERNEL
);
821 return ERR_PTR(-ENOMEM
);
823 state
->connectors
= c
;
824 memset(&state
->connectors
[state
->num_connector
], 0,
825 sizeof(*state
->connectors
) * (alloc
- state
->num_connector
));
827 cs
= krealloc(state
->connector_states
, alloc
* sizeof(*state
->connector_states
), GFP_KERNEL
);
829 return ERR_PTR(-ENOMEM
);
831 state
->connector_states
= cs
;
832 memset(&state
->connector_states
[state
->num_connector
], 0,
833 sizeof(*state
->connector_states
) * (alloc
- state
->num_connector
));
834 state
->num_connector
= alloc
;
837 if (state
->connector_states
[index
])
838 return state
->connector_states
[index
];
840 connector_state
= connector
->funcs
->atomic_duplicate_state(connector
);
841 if (!connector_state
)
842 return ERR_PTR(-ENOMEM
);
844 state
->connector_states
[index
] = connector_state
;
845 state
->connectors
[index
] = connector
;
846 connector_state
->state
= state
;
848 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n",
849 connector
->base
.id
, connector_state
, state
);
851 if (connector_state
->crtc
) {
852 struct drm_crtc_state
*crtc_state
;
854 crtc_state
= drm_atomic_get_crtc_state(state
,
855 connector_state
->crtc
);
856 if (IS_ERR(crtc_state
))
857 return ERR_CAST(crtc_state
);
860 return connector_state
;
862 EXPORT_SYMBOL(drm_atomic_get_connector_state
);
865 * drm_atomic_connector_set_property - set property on connector.
866 * @connector: the drm connector to set a property on
867 * @state: the state object to update with the new property value
868 * @property: the property to set
869 * @val: the new property value
871 * Use this instead of calling connector->atomic_set_property directly.
872 * This function handles generic/core properties and calls out to
873 * driver's ->atomic_set_property() for driver properties. To ensure
874 * consistent behavior you must call this function rather than the
875 * driver hook directly.
878 * Zero on success, error code on failure
880 int drm_atomic_connector_set_property(struct drm_connector
*connector
,
881 struct drm_connector_state
*state
, struct drm_property
*property
,
884 struct drm_device
*dev
= connector
->dev
;
885 struct drm_mode_config
*config
= &dev
->mode_config
;
887 if (property
== config
->prop_crtc_id
) {
888 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
889 return drm_atomic_set_crtc_for_connector(state
, crtc
);
890 } else if (property
== config
->dpms_property
) {
891 /* setting DPMS property requires special handling, which
892 * is done in legacy setprop path for us. Disallow (for
893 * now?) atomic writes to DPMS property:
896 } else if (connector
->funcs
->atomic_set_property
) {
897 return connector
->funcs
->atomic_set_property(connector
,
898 state
, property
, val
);
903 EXPORT_SYMBOL(drm_atomic_connector_set_property
);
906 * drm_atomic_connector_get_property - get property value from connector state
907 * @connector: the drm connector to set a property on
908 * @state: the state object to get the property value from
909 * @property: the property to set
910 * @val: return location for the property value
912 * This function handles generic/core properties and calls out to
913 * driver's ->atomic_get_property() for driver properties. To ensure
914 * consistent behavior you must call this function rather than the
915 * driver hook directly.
918 * Zero on success, error code on failure
921 drm_atomic_connector_get_property(struct drm_connector
*connector
,
922 const struct drm_connector_state
*state
,
923 struct drm_property
*property
, uint64_t *val
)
925 struct drm_device
*dev
= connector
->dev
;
926 struct drm_mode_config
*config
= &dev
->mode_config
;
928 if (property
== config
->prop_crtc_id
) {
929 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
930 } else if (property
== config
->dpms_property
) {
931 *val
= connector
->dpms
;
932 } else if (connector
->funcs
->atomic_get_property
) {
933 return connector
->funcs
->atomic_get_property(connector
,
934 state
, property
, val
);
942 int drm_atomic_get_property(struct drm_mode_object
*obj
,
943 struct drm_property
*property
, uint64_t *val
)
945 struct drm_device
*dev
= property
->dev
;
949 case DRM_MODE_OBJECT_CONNECTOR
: {
950 struct drm_connector
*connector
= obj_to_connector(obj
);
951 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
952 ret
= drm_atomic_connector_get_property(connector
,
953 connector
->state
, property
, val
);
956 case DRM_MODE_OBJECT_CRTC
: {
957 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
958 WARN_ON(!drm_modeset_is_locked(&crtc
->mutex
));
959 ret
= drm_atomic_crtc_get_property(crtc
,
960 crtc
->state
, property
, val
);
963 case DRM_MODE_OBJECT_PLANE
: {
964 struct drm_plane
*plane
= obj_to_plane(obj
);
965 WARN_ON(!drm_modeset_is_locked(&plane
->mutex
));
966 ret
= drm_atomic_plane_get_property(plane
,
967 plane
->state
, property
, val
);
979 * drm_atomic_set_crtc_for_plane - set crtc for plane
980 * @plane_state: the plane whose incoming state to update
981 * @crtc: crtc to use for the plane
983 * Changing the assigned crtc for a plane requires us to grab the lock and state
984 * for the new crtc, as needed. This function takes care of all these details
985 * besides updating the pointer in the state object itself.
988 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
989 * then the w/w mutex code has detected a deadlock and the entire atomic
990 * sequence must be restarted. All other errors are fatal.
993 drm_atomic_set_crtc_for_plane(struct drm_plane_state
*plane_state
,
994 struct drm_crtc
*crtc
)
996 struct drm_plane
*plane
= plane_state
->plane
;
997 struct drm_crtc_state
*crtc_state
;
999 if (plane_state
->crtc
) {
1000 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
1002 if (WARN_ON(IS_ERR(crtc_state
)))
1003 return PTR_ERR(crtc_state
);
1005 crtc_state
->plane_mask
&= ~(1 << drm_plane_index(plane
));
1008 plane_state
->crtc
= crtc
;
1011 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
1013 if (IS_ERR(crtc_state
))
1014 return PTR_ERR(crtc_state
);
1015 crtc_state
->plane_mask
|= (1 << drm_plane_index(plane
));
1019 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1020 plane_state
, crtc
->base
.id
, crtc
->name
);
1022 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1027 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane
);
1030 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1031 * @plane_state: atomic state object for the plane
1032 * @fb: fb to use for the plane
1034 * Changing the assigned framebuffer for a plane requires us to grab a reference
1035 * to the new fb and drop the reference to the old fb, if there is one. This
1036 * function takes care of all these details besides updating the pointer in the
1037 * state object itself.
1040 drm_atomic_set_fb_for_plane(struct drm_plane_state
*plane_state
,
1041 struct drm_framebuffer
*fb
)
1043 if (plane_state
->fb
)
1044 drm_framebuffer_unreference(plane_state
->fb
);
1046 drm_framebuffer_reference(fb
);
1047 plane_state
->fb
= fb
;
1050 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1051 fb
->base
.id
, plane_state
);
1053 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1056 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane
);
1059 * drm_atomic_set_crtc_for_connector - set crtc for connector
1060 * @conn_state: atomic state object for the connector
1061 * @crtc: crtc to use for the connector
1063 * Changing the assigned crtc for a connector requires us to grab the lock and
1064 * state for the new crtc, as needed. This function takes care of all these
1065 * details besides updating the pointer in the state object itself.
1068 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1069 * then the w/w mutex code has detected a deadlock and the entire atomic
1070 * sequence must be restarted. All other errors are fatal.
1073 drm_atomic_set_crtc_for_connector(struct drm_connector_state
*conn_state
,
1074 struct drm_crtc
*crtc
)
1076 struct drm_crtc_state
*crtc_state
;
1078 if (conn_state
->crtc
&& conn_state
->crtc
!= crtc
) {
1079 crtc_state
= drm_atomic_get_existing_crtc_state(conn_state
->state
,
1082 crtc_state
->connector_mask
&=
1083 ~(1 << drm_connector_index(conn_state
->connector
));
1087 crtc_state
= drm_atomic_get_crtc_state(conn_state
->state
, crtc
);
1088 if (IS_ERR(crtc_state
))
1089 return PTR_ERR(crtc_state
);
1091 crtc_state
->connector_mask
|=
1092 1 << drm_connector_index(conn_state
->connector
);
1095 conn_state
->crtc
= crtc
;
1098 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1099 conn_state
, crtc
->base
.id
, crtc
->name
);
1101 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1106 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector
);
1109 * drm_atomic_add_affected_connectors - add connectors for crtc
1110 * @state: atomic state
1113 * This function walks the current configuration and adds all connectors
1114 * currently using @crtc to the atomic configuration @state. Note that this
1115 * function must acquire the connection mutex. This can potentially cause
1116 * unneeded seralization if the update is just for the planes on one crtc. Hence
1117 * drivers and helpers should only call this when really needed (e.g. when a
1118 * full modeset needs to happen due to some change).
1121 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1122 * then the w/w mutex code has detected a deadlock and the entire atomic
1123 * sequence must be restarted. All other errors are fatal.
1126 drm_atomic_add_affected_connectors(struct drm_atomic_state
*state
,
1127 struct drm_crtc
*crtc
)
1129 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1130 struct drm_connector
*connector
;
1131 struct drm_connector_state
*conn_state
;
1134 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
1138 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1139 crtc
->base
.id
, crtc
->name
, state
);
1142 * Changed connectors are already in @state, so only need to look at the
1143 * current configuration.
1145 drm_for_each_connector(connector
, state
->dev
) {
1146 if (connector
->state
->crtc
!= crtc
)
1149 conn_state
= drm_atomic_get_connector_state(state
, connector
);
1150 if (IS_ERR(conn_state
))
1151 return PTR_ERR(conn_state
);
1156 EXPORT_SYMBOL(drm_atomic_add_affected_connectors
);
1159 * drm_atomic_add_affected_planes - add planes for crtc
1160 * @state: atomic state
1163 * This function walks the current configuration and adds all planes
1164 * currently used by @crtc to the atomic configuration @state. This is useful
1165 * when an atomic commit also needs to check all currently enabled plane on
1166 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1167 * to avoid special code to force-enable all planes.
1169 * Since acquiring a plane state will always also acquire the w/w mutex of the
1170 * current CRTC for that plane (if there is any) adding all the plane states for
1171 * a CRTC will not reduce parallism of atomic updates.
1174 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1175 * then the w/w mutex code has detected a deadlock and the entire atomic
1176 * sequence must be restarted. All other errors are fatal.
1179 drm_atomic_add_affected_planes(struct drm_atomic_state
*state
,
1180 struct drm_crtc
*crtc
)
1182 struct drm_plane
*plane
;
1184 WARN_ON(!drm_atomic_get_existing_crtc_state(state
, crtc
));
1186 drm_for_each_plane_mask(plane
, state
->dev
, crtc
->state
->plane_mask
) {
1187 struct drm_plane_state
*plane_state
=
1188 drm_atomic_get_plane_state(state
, plane
);
1190 if (IS_ERR(plane_state
))
1191 return PTR_ERR(plane_state
);
1195 EXPORT_SYMBOL(drm_atomic_add_affected_planes
);
1198 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
1199 * @state: atomic state
1201 * This function should be used by legacy entry points which don't understand
1202 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
1203 * the slowpath completed.
1205 void drm_atomic_legacy_backoff(struct drm_atomic_state
*state
)
1210 drm_modeset_backoff(state
->acquire_ctx
);
1212 ret
= drm_modeset_lock_all_ctx(state
->dev
, state
->acquire_ctx
);
1216 EXPORT_SYMBOL(drm_atomic_legacy_backoff
);
1219 * drm_atomic_check_only - check whether a given config would work
1220 * @state: atomic configuration to check
1222 * Note that this function can return -EDEADLK if the driver needed to acquire
1223 * more locks but encountered a deadlock. The caller must then do the usual w/w
1224 * backoff dance and restart. All other errors are fatal.
1227 * 0 on success, negative error code on failure.
1229 int drm_atomic_check_only(struct drm_atomic_state
*state
)
1231 struct drm_device
*dev
= state
->dev
;
1232 struct drm_mode_config
*config
= &dev
->mode_config
;
1233 struct drm_plane
*plane
;
1234 struct drm_plane_state
*plane_state
;
1235 struct drm_crtc
*crtc
;
1236 struct drm_crtc_state
*crtc_state
;
1239 DRM_DEBUG_ATOMIC("checking %p\n", state
);
1241 for_each_plane_in_state(state
, plane
, plane_state
, i
) {
1242 ret
= drm_atomic_plane_check(plane
, plane_state
);
1244 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1245 plane
->base
.id
, plane
->name
);
1250 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1251 ret
= drm_atomic_crtc_check(crtc
, crtc_state
);
1253 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1254 crtc
->base
.id
, crtc
->name
);
1259 if (config
->funcs
->atomic_check
)
1260 ret
= config
->funcs
->atomic_check(state
->dev
, state
);
1262 if (!state
->allow_modeset
) {
1263 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1264 if (drm_atomic_crtc_needs_modeset(crtc_state
)) {
1265 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1266 crtc
->base
.id
, crtc
->name
);
1274 EXPORT_SYMBOL(drm_atomic_check_only
);
1277 * drm_atomic_commit - commit configuration atomically
1278 * @state: atomic configuration to check
1280 * Note that this function can return -EDEADLK if the driver needed to acquire
1281 * more locks but encountered a deadlock. The caller must then do the usual w/w
1282 * backoff dance and restart. All other errors are fatal.
1284 * Also note that on successful execution ownership of @state is transferred
1285 * from the caller of this function to the function itself. The caller must not
1286 * free or in any other way access @state. If the function fails then the caller
1287 * must clean up @state itself.
1290 * 0 on success, negative error code on failure.
1292 int drm_atomic_commit(struct drm_atomic_state
*state
)
1294 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1297 ret
= drm_atomic_check_only(state
);
1301 DRM_DEBUG_ATOMIC("commiting %p\n", state
);
1303 return config
->funcs
->atomic_commit(state
->dev
, state
, false);
1305 EXPORT_SYMBOL(drm_atomic_commit
);
1308 * drm_atomic_async_commit - atomic&async configuration commit
1309 * @state: atomic configuration to check
1311 * Note that this function can return -EDEADLK if the driver needed to acquire
1312 * more locks but encountered a deadlock. The caller must then do the usual w/w
1313 * backoff dance and restart. All other errors are fatal.
1315 * Also note that on successful execution ownership of @state is transferred
1316 * from the caller of this function to the function itself. The caller must not
1317 * free or in any other way access @state. If the function fails then the caller
1318 * must clean up @state itself.
1321 * 0 on success, negative error code on failure.
1323 int drm_atomic_async_commit(struct drm_atomic_state
*state
)
1325 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1328 ret
= drm_atomic_check_only(state
);
1332 DRM_DEBUG_ATOMIC("commiting %p asynchronously\n", state
);
1334 return config
->funcs
->atomic_commit(state
->dev
, state
, true);
1336 EXPORT_SYMBOL(drm_atomic_async_commit
);
1339 * The big monstor ioctl
1342 static struct drm_pending_vblank_event
*create_vblank_event(
1343 struct drm_device
*dev
, struct drm_file
*file_priv
, uint64_t user_data
)
1345 struct drm_pending_vblank_event
*e
= NULL
;
1348 e
= kzalloc(sizeof *e
, GFP_KERNEL
);
1352 e
->event
.base
.type
= DRM_EVENT_FLIP_COMPLETE
;
1353 e
->event
.base
.length
= sizeof(e
->event
);
1354 e
->event
.user_data
= user_data
;
1356 ret
= drm_event_reserve_init(dev
, file_priv
, &e
->base
, &e
->event
.base
);
1365 static int atomic_set_prop(struct drm_atomic_state
*state
,
1366 struct drm_mode_object
*obj
, struct drm_property
*prop
,
1367 uint64_t prop_value
)
1369 struct drm_mode_object
*ref
;
1372 if (!drm_property_change_valid_get(prop
, prop_value
, &ref
))
1375 switch (obj
->type
) {
1376 case DRM_MODE_OBJECT_CONNECTOR
: {
1377 struct drm_connector
*connector
= obj_to_connector(obj
);
1378 struct drm_connector_state
*connector_state
;
1380 connector_state
= drm_atomic_get_connector_state(state
, connector
);
1381 if (IS_ERR(connector_state
)) {
1382 ret
= PTR_ERR(connector_state
);
1386 ret
= drm_atomic_connector_set_property(connector
,
1387 connector_state
, prop
, prop_value
);
1390 case DRM_MODE_OBJECT_CRTC
: {
1391 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
1392 struct drm_crtc_state
*crtc_state
;
1394 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1395 if (IS_ERR(crtc_state
)) {
1396 ret
= PTR_ERR(crtc_state
);
1400 ret
= drm_atomic_crtc_set_property(crtc
,
1401 crtc_state
, prop
, prop_value
);
1404 case DRM_MODE_OBJECT_PLANE
: {
1405 struct drm_plane
*plane
= obj_to_plane(obj
);
1406 struct drm_plane_state
*plane_state
;
1408 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1409 if (IS_ERR(plane_state
)) {
1410 ret
= PTR_ERR(plane_state
);
1414 ret
= drm_atomic_plane_set_property(plane
,
1415 plane_state
, prop
, prop_value
);
1423 drm_property_change_valid_put(prop
, ref
);
1428 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
1430 * @dev: drm device to check.
1431 * @plane_mask: plane mask for planes that were updated.
1432 * @ret: return value, can be -EDEADLK for a retry.
1434 * Before doing an update plane->old_fb is set to plane->fb,
1435 * but before dropping the locks old_fb needs to be set to NULL
1436 * and plane->fb updated. This is a common operation for each
1437 * atomic update, so this call is split off as a helper.
1439 void drm_atomic_clean_old_fb(struct drm_device
*dev
,
1440 unsigned plane_mask
,
1443 struct drm_plane
*plane
;
1445 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1446 * locks (ie. while it is still safe to deref plane->state). We
1447 * need to do this here because the driver entry points cannot
1448 * distinguish between legacy and atomic ioctls.
1450 drm_for_each_plane_mask(plane
, dev
, plane_mask
) {
1452 struct drm_framebuffer
*new_fb
= plane
->state
->fb
;
1454 drm_framebuffer_reference(new_fb
);
1456 plane
->crtc
= plane
->state
->crtc
;
1459 drm_framebuffer_unreference(plane
->old_fb
);
1461 plane
->old_fb
= NULL
;
1464 EXPORT_SYMBOL(drm_atomic_clean_old_fb
);
1466 int drm_mode_atomic_ioctl(struct drm_device
*dev
,
1467 void *data
, struct drm_file
*file_priv
)
1469 struct drm_mode_atomic
*arg
= data
;
1470 uint32_t __user
*objs_ptr
= (uint32_t __user
*)(unsigned long)(arg
->objs_ptr
);
1471 uint32_t __user
*count_props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->count_props_ptr
);
1472 uint32_t __user
*props_ptr
= (uint32_t __user
*)(unsigned long)(arg
->props_ptr
);
1473 uint64_t __user
*prop_values_ptr
= (uint64_t __user
*)(unsigned long)(arg
->prop_values_ptr
);
1474 unsigned int copied_objs
, copied_props
;
1475 struct drm_atomic_state
*state
;
1476 struct drm_modeset_acquire_ctx ctx
;
1477 struct drm_plane
*plane
;
1478 struct drm_crtc
*crtc
;
1479 struct drm_crtc_state
*crtc_state
;
1480 unsigned plane_mask
;
1484 /* disallow for drivers not supporting atomic: */
1485 if (!drm_core_check_feature(dev
, DRIVER_ATOMIC
))
1488 /* disallow for userspace that has not enabled atomic cap (even
1489 * though this may be a bit overkill, since legacy userspace
1490 * wouldn't know how to call this ioctl)
1492 if (!file_priv
->atomic
)
1495 if (arg
->flags
& ~DRM_MODE_ATOMIC_FLAGS
)
1501 if ((arg
->flags
& DRM_MODE_PAGE_FLIP_ASYNC
) &&
1502 !dev
->mode_config
.async_page_flip
)
1505 /* can't test and expect an event at the same time. */
1506 if ((arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) &&
1507 (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
))
1510 drm_modeset_acquire_init(&ctx
, 0);
1512 state
= drm_atomic_state_alloc(dev
);
1516 state
->acquire_ctx
= &ctx
;
1517 state
->allow_modeset
= !!(arg
->flags
& DRM_MODE_ATOMIC_ALLOW_MODESET
);
1524 for (i
= 0; i
< arg
->count_objs
; i
++) {
1525 uint32_t obj_id
, count_props
;
1526 struct drm_mode_object
*obj
;
1528 if (get_user(obj_id
, objs_ptr
+ copied_objs
)) {
1533 obj
= drm_mode_object_find(dev
, obj_id
, DRM_MODE_OBJECT_ANY
);
1534 if (!obj
|| !obj
->properties
) {
1539 if (get_user(count_props
, count_props_ptr
+ copied_objs
)) {
1546 for (j
= 0; j
< count_props
; j
++) {
1548 uint64_t prop_value
;
1549 struct drm_property
*prop
;
1551 if (get_user(prop_id
, props_ptr
+ copied_props
)) {
1556 prop
= drm_property_find(dev
, prop_id
);
1562 if (copy_from_user(&prop_value
,
1563 prop_values_ptr
+ copied_props
,
1564 sizeof(prop_value
))) {
1569 ret
= atomic_set_prop(state
, obj
, prop
, prop_value
);
1576 if (obj
->type
== DRM_MODE_OBJECT_PLANE
&& count_props
&&
1577 !(arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)) {
1578 plane
= obj_to_plane(obj
);
1579 plane_mask
|= (1 << drm_plane_index(plane
));
1580 plane
->old_fb
= plane
->fb
;
1584 if (arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1585 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1586 struct drm_pending_vblank_event
*e
;
1588 e
= create_vblank_event(dev
, file_priv
, arg
->user_data
);
1594 crtc_state
->event
= e
;
1598 if (arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
) {
1600 * Unlike commit, check_only does not clean up state.
1601 * Below we call drm_atomic_state_free for it.
1603 ret
= drm_atomic_check_only(state
);
1604 } else if (arg
->flags
& DRM_MODE_ATOMIC_NONBLOCK
) {
1605 ret
= drm_atomic_async_commit(state
);
1607 ret
= drm_atomic_commit(state
);
1611 drm_atomic_clean_old_fb(dev
, plane_mask
, ret
);
1613 if (ret
&& arg
->flags
& DRM_MODE_PAGE_FLIP_EVENT
) {
1615 * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
1616 * if they weren't, this code should be called on success
1617 * for TEST_ONLY too.
1620 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1621 if (!crtc_state
->event
)
1624 drm_event_cancel_free(dev
, &crtc_state
->event
->base
);
1628 if (ret
== -EDEADLK
) {
1629 drm_atomic_state_clear(state
);
1630 drm_modeset_backoff(&ctx
);
1634 if (ret
|| arg
->flags
& DRM_MODE_ATOMIC_TEST_ONLY
)
1635 drm_atomic_state_free(state
);
1637 drm_modeset_drop_locks(&ctx
);
1638 drm_modeset_acquire_fini(&ctx
);