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>
29 #include <drm/drm_atomic.h>
30 #include <drm/drm_plane_helper.h>
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/drm_atomic_helper.h>
33 #include <linux/fence.h>
38 * This helper library provides implementations of check and commit functions on
39 * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
40 * also provides convenience implementations for the atomic state handling
41 * callbacks for drivers which don't need to subclass the drm core structures to
42 * add their own additional internal state.
44 * This library also provides default implementations for the check callback in
45 * drm_atomic_helper_check and for the commit callback with
46 * drm_atomic_helper_commit. But the individual stages and callbacks are expose
47 * to allow drivers to mix and match and e.g. use the plane helpers only
48 * together with a driver private modeset implementation.
50 * This library also provides implementations for all the legacy driver
51 * interfaces on top of the atomic interface. See drm_atomic_helper_set_config,
52 * drm_atomic_helper_disable_plane, drm_atomic_helper_disable_plane and the
53 * various functions to implement set_property callbacks. New drivers must not
54 * implement these functions themselves but must use the provided helpers.
57 drm_atomic_helper_plane_changed(struct drm_atomic_state
*state
,
58 struct drm_plane_state
*plane_state
,
59 struct drm_plane
*plane
)
61 struct drm_crtc_state
*crtc_state
;
63 if (plane
->state
->crtc
) {
64 crtc_state
= state
->crtc_states
[drm_crtc_index(plane
->crtc
)];
66 if (WARN_ON(!crtc_state
))
69 crtc_state
->planes_changed
= true;
72 if (plane_state
->crtc
) {
74 state
->crtc_states
[drm_crtc_index(plane_state
->crtc
)];
76 if (WARN_ON(!crtc_state
))
79 crtc_state
->planes_changed
= true;
83 static struct drm_crtc
*
84 get_current_crtc_for_encoder(struct drm_device
*dev
,
85 struct drm_encoder
*encoder
)
87 struct drm_mode_config
*config
= &dev
->mode_config
;
88 struct drm_connector
*connector
;
90 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
92 list_for_each_entry(connector
, &config
->connector_list
, head
) {
93 if (connector
->state
->best_encoder
!= encoder
)
96 return connector
->state
->crtc
;
103 steal_encoder(struct drm_atomic_state
*state
,
104 struct drm_encoder
*encoder
,
105 struct drm_crtc
*encoder_crtc
)
107 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
108 struct drm_crtc_state
*crtc_state
;
109 struct drm_connector
*connector
;
110 struct drm_connector_state
*connector_state
;
114 * We can only steal an encoder coming from a connector, which means we
115 * must already hold the connection_mutex.
117 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
119 DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
120 encoder
->base
.id
, encoder
->name
,
121 encoder_crtc
->base
.id
);
123 crtc_state
= drm_atomic_get_crtc_state(state
, encoder_crtc
);
124 if (IS_ERR(crtc_state
))
125 return PTR_ERR(crtc_state
);
127 crtc_state
->mode_changed
= true;
129 list_for_each_entry(connector
, &config
->connector_list
, head
) {
130 if (connector
->state
->best_encoder
!= encoder
)
133 DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n",
137 connector_state
= drm_atomic_get_connector_state(state
,
139 if (IS_ERR(connector_state
))
140 return PTR_ERR(connector_state
);
142 ret
= drm_atomic_set_crtc_for_connector(connector_state
, NULL
);
145 connector_state
->best_encoder
= NULL
;
152 update_connector_routing(struct drm_atomic_state
*state
, int conn_idx
)
154 struct drm_connector_helper_funcs
*funcs
;
155 struct drm_encoder
*new_encoder
;
156 struct drm_crtc
*encoder_crtc
;
157 struct drm_connector
*connector
;
158 struct drm_connector_state
*connector_state
;
159 struct drm_crtc_state
*crtc_state
;
162 connector
= state
->connectors
[conn_idx
];
163 connector_state
= state
->connector_states
[conn_idx
];
168 DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n",
172 if (connector
->state
->crtc
!= connector_state
->crtc
) {
173 if (connector
->state
->crtc
) {
174 idx
= drm_crtc_index(connector
->state
->crtc
);
176 crtc_state
= state
->crtc_states
[idx
];
177 crtc_state
->mode_changed
= true;
180 if (connector_state
->crtc
) {
181 idx
= drm_crtc_index(connector_state
->crtc
);
183 crtc_state
= state
->crtc_states
[idx
];
184 crtc_state
->mode_changed
= true;
188 if (!connector_state
->crtc
) {
189 DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n",
193 connector_state
->best_encoder
= NULL
;
198 funcs
= connector
->helper_private
;
199 new_encoder
= funcs
->best_encoder(connector
);
202 DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n",
208 if (new_encoder
== connector_state
->best_encoder
) {
209 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n",
212 new_encoder
->base
.id
,
214 connector_state
->crtc
->base
.id
);
219 encoder_crtc
= get_current_crtc_for_encoder(state
->dev
,
223 ret
= steal_encoder(state
, new_encoder
, encoder_crtc
);
225 DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n",
232 connector_state
->best_encoder
= new_encoder
;
233 idx
= drm_crtc_index(connector_state
->crtc
);
235 crtc_state
= state
->crtc_states
[idx
];
236 crtc_state
->mode_changed
= true;
238 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n",
241 new_encoder
->base
.id
,
243 connector_state
->crtc
->base
.id
);
249 mode_fixup(struct drm_atomic_state
*state
)
251 int ncrtcs
= state
->dev
->mode_config
.num_crtc
;
252 struct drm_crtc_state
*crtc_state
;
253 struct drm_connector_state
*conn_state
;
257 for (i
= 0; i
< ncrtcs
; i
++) {
258 crtc_state
= state
->crtc_states
[i
];
260 if (!crtc_state
|| !crtc_state
->mode_changed
)
263 drm_mode_copy(&crtc_state
->adjusted_mode
, &crtc_state
->mode
);
266 for (i
= 0; i
< state
->num_connector
; i
++) {
267 struct drm_encoder_helper_funcs
*funcs
;
268 struct drm_encoder
*encoder
;
270 conn_state
= state
->connector_states
[i
];
275 WARN_ON(!!conn_state
->best_encoder
!= !!conn_state
->crtc
);
277 if (!conn_state
->crtc
|| !conn_state
->best_encoder
)
281 state
->crtc_states
[drm_crtc_index(conn_state
->crtc
)];
284 * Each encoder has at most one connector (since we always steal
285 * it away), so we won't call ->mode_fixup twice.
287 encoder
= conn_state
->best_encoder
;
288 funcs
= encoder
->helper_private
;
290 if (encoder
->bridge
&& encoder
->bridge
->funcs
->mode_fixup
) {
291 ret
= encoder
->bridge
->funcs
->mode_fixup(
292 encoder
->bridge
, &crtc_state
->mode
,
293 &crtc_state
->adjusted_mode
);
295 DRM_DEBUG_KMS("Bridge fixup failed\n");
301 ret
= funcs
->mode_fixup(encoder
, &crtc_state
->mode
,
302 &crtc_state
->adjusted_mode
);
304 DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n",
305 encoder
->base
.id
, encoder
->name
);
310 for (i
= 0; i
< ncrtcs
; i
++) {
311 struct drm_crtc_helper_funcs
*funcs
;
312 struct drm_crtc
*crtc
;
314 crtc_state
= state
->crtc_states
[i
];
315 crtc
= state
->crtcs
[i
];
317 if (!crtc_state
|| !crtc_state
->mode_changed
)
320 funcs
= crtc
->helper_private
;
321 ret
= funcs
->mode_fixup(crtc
, &crtc_state
->mode
,
322 &crtc_state
->adjusted_mode
);
324 DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n",
334 drm_atomic_helper_check_modeset(struct drm_device
*dev
,
335 struct drm_atomic_state
*state
)
337 int ncrtcs
= dev
->mode_config
.num_crtc
;
338 struct drm_crtc
*crtc
;
339 struct drm_crtc_state
*crtc_state
;
342 for (i
= 0; i
< ncrtcs
; i
++) {
343 crtc
= state
->crtcs
[i
];
344 crtc_state
= state
->crtc_states
[i
];
349 if (!drm_mode_equal(&crtc
->state
->mode
, &crtc_state
->mode
)) {
350 DRM_DEBUG_KMS("[CRTC:%d] mode changed\n",
352 crtc_state
->mode_changed
= true;
355 if (crtc
->state
->enable
!= crtc_state
->enable
) {
356 DRM_DEBUG_KMS("[CRTC:%d] enable changed\n",
358 crtc_state
->mode_changed
= true;
362 for (i
= 0; i
< state
->num_connector
; i
++) {
364 * This only sets crtc->mode_changed for routing changes,
365 * drivers must set crtc->mode_changed themselves when connector
366 * properties need to be updated.
368 ret
= update_connector_routing(state
, i
);
374 * After all the routing has been prepared we need to add in any
375 * connector which is itself unchanged, but who's crtc changes it's
376 * configuration. This must be done before calling mode_fixup in case a
377 * crtc only changed its mode but has the same set of connectors.
379 for (i
= 0; i
< ncrtcs
; i
++) {
382 crtc
= state
->crtcs
[i
];
383 crtc_state
= state
->crtc_states
[i
];
385 if (!crtc
|| !crtc_state
->mode_changed
)
388 DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n",
390 crtc_state
->enable
? 'y' : 'n');
392 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
396 num_connectors
= drm_atomic_connectors_for_crtc(state
,
399 if (crtc_state
->enable
!= !!num_connectors
) {
400 DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n",
407 return mode_fixup(state
);
411 * drm_atomic_helper_check - validate state object
413 * @state: the driver state object
415 * Check the state object to see if the requested state is physically possible.
416 * Only crtcs and planes have check callbacks, so for any additional (global)
417 * checking that a driver needs it can simply wrap that around this function.
418 * Drivers without such needs can directly use this as their ->atomic_check()
422 * Zero for success or -errno
424 int drm_atomic_helper_check(struct drm_device
*dev
,
425 struct drm_atomic_state
*state
)
427 int nplanes
= dev
->mode_config
.num_total_plane
;
428 int ncrtcs
= dev
->mode_config
.num_crtc
;
431 for (i
= 0; i
< nplanes
; i
++) {
432 struct drm_plane_helper_funcs
*funcs
;
433 struct drm_plane
*plane
= state
->planes
[i
];
434 struct drm_plane_state
*plane_state
= state
->plane_states
[i
];
439 funcs
= plane
->helper_private
;
441 drm_atomic_helper_plane_changed(state
, plane_state
, plane
);
443 if (!funcs
|| !funcs
->atomic_check
)
446 ret
= funcs
->atomic_check(plane
, plane_state
);
448 DRM_DEBUG_KMS("[PLANE:%d] atomic check failed\n",
454 for (i
= 0; i
< ncrtcs
; i
++) {
455 struct drm_crtc_helper_funcs
*funcs
;
456 struct drm_crtc
*crtc
= state
->crtcs
[i
];
461 funcs
= crtc
->helper_private
;
463 if (!funcs
|| !funcs
->atomic_check
)
466 ret
= funcs
->atomic_check(crtc
, state
->crtc_states
[i
]);
468 DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n",
474 ret
= drm_atomic_helper_check_modeset(dev
, state
);
480 EXPORT_SYMBOL(drm_atomic_helper_check
);
483 disable_outputs(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
485 int ncrtcs
= old_state
->dev
->mode_config
.num_crtc
;
488 for (i
= 0; i
< old_state
->num_connector
; i
++) {
489 struct drm_connector_state
*old_conn_state
;
490 struct drm_connector
*connector
;
491 struct drm_encoder_helper_funcs
*funcs
;
492 struct drm_encoder
*encoder
;
494 old_conn_state
= old_state
->connector_states
[i
];
495 connector
= old_state
->connectors
[i
];
497 /* Shut down everything that's in the changeset and currently
498 * still on. So need to check the old, saved state. */
499 if (!old_conn_state
|| !old_conn_state
->crtc
)
502 encoder
= old_conn_state
->best_encoder
;
504 /* We shouldn't get this far if we didn't previously have
505 * an encoder.. but WARN_ON() rather than explode.
507 if (WARN_ON(!encoder
))
510 funcs
= encoder
->helper_private
;
513 * Each encoder has at most one connector (since we always steal
514 * it away), so we won't call call disable hooks twice.
517 encoder
->bridge
->funcs
->disable(encoder
->bridge
);
519 /* Right function depends upon target state. */
520 if (connector
->state
->crtc
)
521 funcs
->prepare(encoder
);
522 else if (funcs
->disable
)
523 funcs
->disable(encoder
);
525 funcs
->dpms(encoder
, DRM_MODE_DPMS_OFF
);
528 encoder
->bridge
->funcs
->post_disable(encoder
->bridge
);
531 for (i
= 0; i
< ncrtcs
; i
++) {
532 struct drm_crtc_helper_funcs
*funcs
;
533 struct drm_crtc
*crtc
;
535 crtc
= old_state
->crtcs
[i
];
537 /* Shut down everything that needs a full modeset. */
538 if (!crtc
|| !crtc
->state
->mode_changed
)
541 funcs
= crtc
->helper_private
;
543 /* Right function depends upon target state. */
544 if (crtc
->state
->enable
)
545 funcs
->prepare(crtc
);
546 else if (funcs
->disable
)
547 funcs
->disable(crtc
);
549 funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
554 set_routing_links(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
556 int ncrtcs
= old_state
->dev
->mode_config
.num_crtc
;
559 /* clear out existing links */
560 for (i
= 0; i
< old_state
->num_connector
; i
++) {
561 struct drm_connector
*connector
;
563 connector
= old_state
->connectors
[i
];
565 if (!connector
|| !connector
->encoder
)
568 WARN_ON(!connector
->encoder
->crtc
);
570 connector
->encoder
->crtc
= NULL
;
571 connector
->encoder
= NULL
;
575 for (i
= 0; i
< old_state
->num_connector
; i
++) {
576 struct drm_connector
*connector
;
578 connector
= old_state
->connectors
[i
];
580 if (!connector
|| !connector
->state
->crtc
)
583 if (WARN_ON(!connector
->state
->best_encoder
))
586 connector
->encoder
= connector
->state
->best_encoder
;
587 connector
->encoder
->crtc
= connector
->state
->crtc
;
590 /* set legacy state in the crtc structure */
591 for (i
= 0; i
< ncrtcs
; i
++) {
592 struct drm_crtc
*crtc
;
594 crtc
= old_state
->crtcs
[i
];
599 crtc
->mode
= crtc
->state
->mode
;
600 crtc
->enabled
= crtc
->state
->enable
;
601 crtc
->x
= crtc
->primary
->state
->src_x
>> 16;
602 crtc
->y
= crtc
->primary
->state
->src_y
>> 16;
607 crtc_set_mode(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
609 int ncrtcs
= old_state
->dev
->mode_config
.num_crtc
;
612 for (i
= 0; i
< ncrtcs
; i
++) {
613 struct drm_crtc_helper_funcs
*funcs
;
614 struct drm_crtc
*crtc
;
616 crtc
= old_state
->crtcs
[i
];
618 if (!crtc
|| !crtc
->state
->mode_changed
)
621 funcs
= crtc
->helper_private
;
623 if (crtc
->state
->enable
)
624 funcs
->mode_set_nofb(crtc
);
627 for (i
= 0; i
< old_state
->num_connector
; i
++) {
628 struct drm_connector
*connector
;
629 struct drm_crtc_state
*new_crtc_state
;
630 struct drm_encoder_helper_funcs
*funcs
;
631 struct drm_encoder
*encoder
;
632 struct drm_display_mode
*mode
, *adjusted_mode
;
634 connector
= old_state
->connectors
[i
];
636 if (!connector
|| !connector
->state
->best_encoder
)
639 encoder
= connector
->state
->best_encoder
;
640 funcs
= encoder
->helper_private
;
641 new_crtc_state
= connector
->state
->crtc
->state
;
642 mode
= &new_crtc_state
->mode
;
643 adjusted_mode
= &new_crtc_state
->adjusted_mode
;
646 * Each encoder has at most one connector (since we always steal
647 * it away), so we won't call call mode_set hooks twice.
649 funcs
->mode_set(encoder
, mode
, adjusted_mode
);
651 if (encoder
->bridge
&& encoder
->bridge
->funcs
->mode_set
)
652 encoder
->bridge
->funcs
->mode_set(encoder
->bridge
,
653 mode
, adjusted_mode
);
658 * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates
660 * @state: atomic state
662 * This function commits the modeset changes that need to be committed before
663 * updating planes. It shuts down all the outputs that need to be shut down and
664 * prepares them (if required) with the new mode.
666 void drm_atomic_helper_commit_pre_planes(struct drm_device
*dev
,
667 struct drm_atomic_state
*state
)
669 disable_outputs(dev
, state
);
670 set_routing_links(dev
, state
);
671 crtc_set_mode(dev
, state
);
673 EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes
);
676 * drm_atomic_helper_commit_post_planes - modeset commit after plane updates
678 * @old_state: atomic state object with old state structures
680 * This function commits the modeset changes that need to be committed after
681 * updating planes: It enables all the outputs with the new configuration which
682 * had to be turned off for the update.
684 void drm_atomic_helper_commit_post_planes(struct drm_device
*dev
,
685 struct drm_atomic_state
*old_state
)
687 int ncrtcs
= old_state
->dev
->mode_config
.num_crtc
;
690 for (i
= 0; i
< ncrtcs
; i
++) {
691 struct drm_crtc_helper_funcs
*funcs
;
692 struct drm_crtc
*crtc
;
694 crtc
= old_state
->crtcs
[i
];
696 /* Need to filter out CRTCs where only planes change. */
697 if (!crtc
|| !crtc
->state
->mode_changed
)
700 funcs
= crtc
->helper_private
;
702 if (crtc
->state
->enable
)
706 for (i
= 0; i
< old_state
->num_connector
; i
++) {
707 struct drm_connector
*connector
;
708 struct drm_encoder_helper_funcs
*funcs
;
709 struct drm_encoder
*encoder
;
711 connector
= old_state
->connectors
[i
];
713 if (!connector
|| !connector
->state
->best_encoder
)
716 encoder
= connector
->state
->best_encoder
;
717 funcs
= encoder
->helper_private
;
720 * Each encoder has at most one connector (since we always steal
721 * it away), so we won't call call enable hooks twice.
724 encoder
->bridge
->funcs
->pre_enable(encoder
->bridge
);
726 funcs
->commit(encoder
);
729 encoder
->bridge
->funcs
->enable(encoder
->bridge
);
732 EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes
);
734 static void wait_for_fences(struct drm_device
*dev
,
735 struct drm_atomic_state
*state
)
737 int nplanes
= dev
->mode_config
.num_total_plane
;
740 for (i
= 0; i
< nplanes
; i
++) {
741 struct drm_plane
*plane
= state
->planes
[i
];
743 if (!plane
|| !plane
->state
->fence
)
746 WARN_ON(!plane
->state
->fb
);
748 fence_wait(plane
->state
->fence
, false);
749 fence_put(plane
->state
->fence
);
750 plane
->state
->fence
= NULL
;
755 * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs
757 * @old_state: atomic state object with old state structures
759 * Helper to, after atomic commit, wait for vblanks on all effected
760 * crtcs (ie. before cleaning up old framebuffers using
761 * drm_atomic_helper_cleanup_planes())
764 drm_atomic_helper_wait_for_vblanks(struct drm_device
*dev
,
765 struct drm_atomic_state
*old_state
)
767 struct drm_crtc
*crtc
;
768 struct drm_crtc_state
*old_crtc_state
;
769 int ncrtcs
= old_state
->dev
->mode_config
.num_crtc
;
772 for (i
= 0; i
< ncrtcs
; i
++) {
773 crtc
= old_state
->crtcs
[i
];
774 old_crtc_state
= old_state
->crtc_states
[i
];
779 /* No one cares about the old state, so abuse it for tracking
780 * and store whether we hold a vblank reference (and should do a
781 * vblank wait) in the ->enable boolean. */
782 old_crtc_state
->enable
= false;
784 if (!crtc
->state
->enable
)
787 ret
= drm_crtc_vblank_get(crtc
);
791 old_crtc_state
->enable
= true;
792 old_crtc_state
->last_vblank_count
= drm_vblank_count(dev
, i
);
795 for (i
= 0; i
< ncrtcs
; i
++) {
796 crtc
= old_state
->crtcs
[i
];
797 old_crtc_state
= old_state
->crtc_states
[i
];
799 if (!crtc
|| !old_crtc_state
->enable
)
802 ret
= wait_event_timeout(dev
->vblank
[i
].queue
,
803 old_crtc_state
->last_vblank_count
!=
804 drm_vblank_count(dev
, i
),
805 msecs_to_jiffies(50));
807 drm_crtc_vblank_put(crtc
);
810 EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks
);
813 * drm_atomic_helper_commit - commit validated state object
815 * @state: the driver state object
816 * @async: asynchronous commit
818 * This function commits a with drm_atomic_helper_check() pre-validated state
819 * object. This can still fail when e.g. the framebuffer reservation fails. For
820 * now this doesn't implement asynchronous commits.
823 * Zero for success or -errno.
825 int drm_atomic_helper_commit(struct drm_device
*dev
,
826 struct drm_atomic_state
*state
,
834 ret
= drm_atomic_helper_prepare_planes(dev
, state
);
839 * This is the point of no return - everything below never fails except
840 * when the hw goes bonghits. Which means we can commit the new state on
841 * the software side now.
844 drm_atomic_helper_swap_state(dev
, state
);
847 * Everything below can be run asynchronously without the need to grab
848 * any modeset locks at all under one conditions: It must be guaranteed
849 * that the asynchronous work has either been cancelled (if the driver
850 * supports it, which at least requires that the framebuffers get
851 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
852 * before the new state gets committed on the software side with
853 * drm_atomic_helper_swap_state().
855 * This scheme allows new atomic state updates to be prepared and
856 * checked in parallel to the asynchronous completion of the previous
857 * update. Which is important since compositors need to figure out the
858 * composition of the next frame right after having submitted the
862 wait_for_fences(dev
, state
);
864 drm_atomic_helper_commit_pre_planes(dev
, state
);
866 drm_atomic_helper_commit_planes(dev
, state
);
868 drm_atomic_helper_commit_post_planes(dev
, state
);
870 drm_atomic_helper_wait_for_vblanks(dev
, state
);
872 drm_atomic_helper_cleanup_planes(dev
, state
);
874 drm_atomic_state_free(state
);
878 EXPORT_SYMBOL(drm_atomic_helper_commit
);
881 * DOC: implementing async commit
883 * For now the atomic helpers don't support async commit directly. If there is
884 * real need it could be added though, using the dma-buf fence infrastructure
885 * for generic synchronization with outstanding rendering.
887 * For now drivers have to implement async commit themselves, with the following
888 * sequence being the recommended one:
890 * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
891 * which commit needs to call which can fail, so we want to run it first and
894 * 2. Synchronize with any outstanding asynchronous commit worker threads which
895 * might be affected the new state update. This can be done by either cancelling
896 * or flushing the work items, depending upon whether the driver can deal with
897 * cancelled updates. Note that it is important to ensure that the framebuffer
898 * cleanup is still done when cancelling.
900 * For sufficient parallelism it is recommended to have a work item per crtc
901 * (for updates which don't touch global state) and a global one. Then we only
902 * need to synchronize with the crtc work items for changed crtcs and the global
903 * work item, which allows nice concurrent updates on disjoint sets of crtcs.
905 * 3. The software state is updated synchronously with
906 * drm_atomic_helper_swap_state. Doing this under the protection of all modeset
907 * locks means concurrent callers never see inconsistent state. And doing this
908 * while it's guaranteed that no relevant async worker runs means that async
909 * workers do not need grab any locks. Actually they must not grab locks, for
910 * otherwise the work flushing will deadlock.
912 * 4. Schedule a work item to do all subsequent steps, using the split-out
913 * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
914 * then cleaning up the framebuffers after the old framebuffer is no longer
919 * drm_atomic_helper_prepare_planes - prepare plane resources after commit
921 * @state: atomic state object with old state structures
923 * This function prepares plane state, specifically framebuffers, for the new
924 * configuration. If any failure is encountered this function will call
925 * ->cleanup_fb on any already successfully prepared framebuffer.
928 * 0 on success, negative error code on failure.
930 int drm_atomic_helper_prepare_planes(struct drm_device
*dev
,
931 struct drm_atomic_state
*state
)
933 int nplanes
= dev
->mode_config
.num_total_plane
;
936 for (i
= 0; i
< nplanes
; i
++) {
937 struct drm_plane_helper_funcs
*funcs
;
938 struct drm_plane
*plane
= state
->planes
[i
];
939 struct drm_framebuffer
*fb
;
944 funcs
= plane
->helper_private
;
946 fb
= state
->plane_states
[i
]->fb
;
948 if (fb
&& funcs
->prepare_fb
) {
949 ret
= funcs
->prepare_fb(plane
, fb
);
958 for (i
--; i
>= 0; i
--) {
959 struct drm_plane_helper_funcs
*funcs
;
960 struct drm_plane
*plane
= state
->planes
[i
];
961 struct drm_framebuffer
*fb
;
966 funcs
= plane
->helper_private
;
968 fb
= state
->plane_states
[i
]->fb
;
970 if (fb
&& funcs
->cleanup_fb
)
971 funcs
->cleanup_fb(plane
, fb
);
977 EXPORT_SYMBOL(drm_atomic_helper_prepare_planes
);
980 * drm_atomic_helper_commit_planes - commit plane state
982 * @old_state: atomic state object with old state structures
984 * This function commits the new plane state using the plane and atomic helper
985 * functions for planes and crtcs. It assumes that the atomic state has already
986 * been pushed into the relevant object state pointers, since this step can no
989 * It still requires the global state object @old_state to know which planes and
990 * crtcs need to be updated though.
992 void drm_atomic_helper_commit_planes(struct drm_device
*dev
,
993 struct drm_atomic_state
*old_state
)
995 int nplanes
= dev
->mode_config
.num_total_plane
;
996 int ncrtcs
= dev
->mode_config
.num_crtc
;
999 for (i
= 0; i
< ncrtcs
; i
++) {
1000 struct drm_crtc_helper_funcs
*funcs
;
1001 struct drm_crtc
*crtc
= old_state
->crtcs
[i
];
1006 funcs
= crtc
->helper_private
;
1008 if (!funcs
|| !funcs
->atomic_begin
)
1011 funcs
->atomic_begin(crtc
);
1014 for (i
= 0; i
< nplanes
; i
++) {
1015 struct drm_plane_helper_funcs
*funcs
;
1016 struct drm_plane
*plane
= old_state
->planes
[i
];
1021 funcs
= plane
->helper_private
;
1023 if (!funcs
|| !funcs
->atomic_update
)
1026 funcs
->atomic_update(plane
);
1029 for (i
= 0; i
< ncrtcs
; i
++) {
1030 struct drm_crtc_helper_funcs
*funcs
;
1031 struct drm_crtc
*crtc
= old_state
->crtcs
[i
];
1036 funcs
= crtc
->helper_private
;
1038 if (!funcs
|| !funcs
->atomic_flush
)
1041 funcs
->atomic_flush(crtc
);
1044 EXPORT_SYMBOL(drm_atomic_helper_commit_planes
);
1047 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
1049 * @old_state: atomic state object with old state structures
1051 * This function cleans up plane state, specifically framebuffers, from the old
1052 * configuration. Hence the old configuration must be perserved in @old_state to
1053 * be able to call this function.
1055 * This function must also be called on the new state when the atomic update
1056 * fails at any point after calling drm_atomic_helper_prepare_planes().
1058 void drm_atomic_helper_cleanup_planes(struct drm_device
*dev
,
1059 struct drm_atomic_state
*old_state
)
1061 int nplanes
= dev
->mode_config
.num_total_plane
;
1064 for (i
= 0; i
< nplanes
; i
++) {
1065 struct drm_plane_helper_funcs
*funcs
;
1066 struct drm_plane
*plane
= old_state
->planes
[i
];
1067 struct drm_framebuffer
*old_fb
;
1072 funcs
= plane
->helper_private
;
1074 old_fb
= old_state
->plane_states
[i
]->fb
;
1076 if (old_fb
&& funcs
->cleanup_fb
)
1077 funcs
->cleanup_fb(plane
, old_fb
);
1080 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes
);
1083 * drm_atomic_helper_swap_state - store atomic state into current sw state
1085 * @state: atomic state
1087 * This function stores the atomic state into the current state pointers in all
1088 * driver objects. It should be called after all failing steps have been done
1089 * and succeeded, but before the actual hardware state is committed.
1091 * For cleanup and error recovery the current state for all changed objects will
1092 * be swaped into @state.
1094 * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
1096 * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
1098 * 2. Do any other steps that might fail.
1100 * 3. Put the staged state into the current state pointers with this function.
1102 * 4. Actually commit the hardware state.
1104 * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3
1105 * contains the old state. Also do any other cleanup required with that state.
1107 void drm_atomic_helper_swap_state(struct drm_device
*dev
,
1108 struct drm_atomic_state
*state
)
1112 for (i
= 0; i
< dev
->mode_config
.num_connector
; i
++) {
1113 struct drm_connector
*connector
= state
->connectors
[i
];
1118 connector
->state
->state
= state
;
1119 swap(state
->connector_states
[i
], connector
->state
);
1120 connector
->state
->state
= NULL
;
1123 for (i
= 0; i
< dev
->mode_config
.num_crtc
; i
++) {
1124 struct drm_crtc
*crtc
= state
->crtcs
[i
];
1129 crtc
->state
->state
= state
;
1130 swap(state
->crtc_states
[i
], crtc
->state
);
1131 crtc
->state
->state
= NULL
;
1134 for (i
= 0; i
< dev
->mode_config
.num_total_plane
; i
++) {
1135 struct drm_plane
*plane
= state
->planes
[i
];
1140 plane
->state
->state
= state
;
1141 swap(state
->plane_states
[i
], plane
->state
);
1142 plane
->state
->state
= NULL
;
1145 EXPORT_SYMBOL(drm_atomic_helper_swap_state
);
1148 * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
1149 * @plane: plane object to update
1150 * @crtc: owning CRTC of owning plane
1151 * @fb: framebuffer to flip onto plane
1152 * @crtc_x: x offset of primary plane on crtc
1153 * @crtc_y: y offset of primary plane on crtc
1154 * @crtc_w: width of primary plane rectangle on crtc
1155 * @crtc_h: height of primary plane rectangle on crtc
1156 * @src_x: x offset of @fb for panning
1157 * @src_y: y offset of @fb for panning
1158 * @src_w: width of source rectangle in @fb
1159 * @src_h: height of source rectangle in @fb
1161 * Provides a default plane update handler using the atomic driver interface.
1164 * Zero on success, error code on failure
1166 int drm_atomic_helper_update_plane(struct drm_plane
*plane
,
1167 struct drm_crtc
*crtc
,
1168 struct drm_framebuffer
*fb
,
1169 int crtc_x
, int crtc_y
,
1170 unsigned int crtc_w
, unsigned int crtc_h
,
1171 uint32_t src_x
, uint32_t src_y
,
1172 uint32_t src_w
, uint32_t src_h
)
1174 struct drm_atomic_state
*state
;
1175 struct drm_plane_state
*plane_state
;
1178 state
= drm_atomic_state_alloc(plane
->dev
);
1182 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
1184 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1185 if (IS_ERR(plane_state
)) {
1186 ret
= PTR_ERR(plane_state
);
1190 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
1193 drm_atomic_set_fb_for_plane(plane_state
, fb
);
1194 plane_state
->crtc_x
= crtc_x
;
1195 plane_state
->crtc_y
= crtc_y
;
1196 plane_state
->crtc_h
= crtc_h
;
1197 plane_state
->crtc_w
= crtc_w
;
1198 plane_state
->src_x
= src_x
;
1199 plane_state
->src_y
= src_y
;
1200 plane_state
->src_h
= src_h
;
1201 plane_state
->src_w
= src_w
;
1203 ret
= drm_atomic_commit(state
);
1207 /* Driver takes ownership of state on successful commit. */
1210 if (ret
== -EDEADLK
)
1213 drm_atomic_state_free(state
);
1217 drm_atomic_state_clear(state
);
1218 drm_atomic_legacy_backoff(state
);
1221 * Someone might have exchanged the framebuffer while we dropped locks
1222 * in the backoff code. We need to fix up the fb refcount tracking the
1225 plane
->old_fb
= plane
->fb
;
1229 EXPORT_SYMBOL(drm_atomic_helper_update_plane
);
1232 * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
1233 * @plane: plane to disable
1235 * Provides a default plane disable handler using the atomic driver interface.
1238 * Zero on success, error code on failure
1240 int drm_atomic_helper_disable_plane(struct drm_plane
*plane
)
1242 struct drm_atomic_state
*state
;
1243 struct drm_plane_state
*plane_state
;
1246 state
= drm_atomic_state_alloc(plane
->dev
);
1250 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(plane
->crtc
);
1252 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1253 if (IS_ERR(plane_state
)) {
1254 ret
= PTR_ERR(plane_state
);
1258 ret
= drm_atomic_set_crtc_for_plane(plane_state
, NULL
);
1261 drm_atomic_set_fb_for_plane(plane_state
, NULL
);
1262 plane_state
->crtc_x
= 0;
1263 plane_state
->crtc_y
= 0;
1264 plane_state
->crtc_h
= 0;
1265 plane_state
->crtc_w
= 0;
1266 plane_state
->src_x
= 0;
1267 plane_state
->src_y
= 0;
1268 plane_state
->src_h
= 0;
1269 plane_state
->src_w
= 0;
1271 ret
= drm_atomic_commit(state
);
1275 /* Driver takes ownership of state on successful commit. */
1278 if (ret
== -EDEADLK
)
1281 drm_atomic_state_free(state
);
1285 drm_atomic_state_clear(state
);
1286 drm_atomic_legacy_backoff(state
);
1289 * Someone might have exchanged the framebuffer while we dropped locks
1290 * in the backoff code. We need to fix up the fb refcount tracking the
1293 plane
->old_fb
= plane
->fb
;
1297 EXPORT_SYMBOL(drm_atomic_helper_disable_plane
);
1299 static int update_output_state(struct drm_atomic_state
*state
,
1300 struct drm_mode_set
*set
)
1302 struct drm_device
*dev
= set
->crtc
->dev
;
1303 struct drm_connector_state
*conn_state
;
1304 int ncrtcs
= state
->dev
->mode_config
.num_crtc
;
1307 ret
= drm_modeset_lock(&dev
->mode_config
.connection_mutex
,
1308 state
->acquire_ctx
);
1312 /* First grab all affected connector/crtc states. */
1313 for (i
= 0; i
< set
->num_connectors
; i
++) {
1314 conn_state
= drm_atomic_get_connector_state(state
,
1315 set
->connectors
[i
]);
1316 if (IS_ERR(conn_state
))
1317 return PTR_ERR(conn_state
);
1320 for (i
= 0; i
< ncrtcs
; i
++) {
1321 struct drm_crtc
*crtc
= state
->crtcs
[i
];
1326 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
1331 /* Then recompute connector->crtc links and crtc enabling state. */
1332 for (i
= 0; i
< state
->num_connector
; i
++) {
1333 struct drm_connector
*connector
;
1335 connector
= state
->connectors
[i
];
1336 conn_state
= state
->connector_states
[i
];
1341 if (conn_state
->crtc
== set
->crtc
) {
1342 ret
= drm_atomic_set_crtc_for_connector(conn_state
,
1348 for (j
= 0; j
< set
->num_connectors
; j
++) {
1349 if (set
->connectors
[j
] == connector
) {
1350 ret
= drm_atomic_set_crtc_for_connector(conn_state
,
1359 for (i
= 0; i
< ncrtcs
; i
++) {
1360 struct drm_crtc
*crtc
= state
->crtcs
[i
];
1361 struct drm_crtc_state
*crtc_state
= state
->crtc_states
[i
];
1366 /* Don't update ->enable for the CRTC in the set_config request,
1367 * since a mismatch would indicate a bug in the upper layers.
1368 * The actual modeset code later on will catch any
1369 * inconsistencies here. */
1370 if (crtc
== set
->crtc
)
1373 crtc_state
->enable
=
1374 drm_atomic_connectors_for_crtc(state
, crtc
);
1381 * drm_atomic_helper_set_config - set a new config from userspace
1382 * @set: mode set configuration
1384 * Provides a default crtc set_config handler using the atomic driver interface.
1387 * Returns 0 on success, negative errno numbers on failure.
1389 int drm_atomic_helper_set_config(struct drm_mode_set
*set
)
1391 struct drm_atomic_state
*state
;
1392 struct drm_crtc
*crtc
= set
->crtc
;
1393 struct drm_crtc_state
*crtc_state
;
1394 struct drm_plane_state
*primary_state
;
1397 state
= drm_atomic_state_alloc(crtc
->dev
);
1401 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
1403 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1404 if (IS_ERR(crtc_state
)) {
1405 ret
= PTR_ERR(crtc_state
);
1411 WARN_ON(set
->num_connectors
);
1413 crtc_state
->enable
= false;
1418 WARN_ON(!set
->num_connectors
);
1420 crtc_state
->enable
= true;
1421 drm_mode_copy(&crtc_state
->mode
, set
->mode
);
1423 primary_state
= drm_atomic_get_plane_state(state
, crtc
->primary
);
1424 if (IS_ERR(primary_state
)) {
1425 ret
= PTR_ERR(primary_state
);
1429 ret
= drm_atomic_set_crtc_for_plane(primary_state
, crtc
);
1432 drm_atomic_set_fb_for_plane(primary_state
, set
->fb
);
1433 primary_state
->crtc_x
= 0;
1434 primary_state
->crtc_y
= 0;
1435 primary_state
->crtc_h
= set
->mode
->vdisplay
;
1436 primary_state
->crtc_w
= set
->mode
->hdisplay
;
1437 primary_state
->src_x
= set
->x
<< 16;
1438 primary_state
->src_y
= set
->y
<< 16;
1439 primary_state
->src_h
= set
->mode
->vdisplay
<< 16;
1440 primary_state
->src_w
= set
->mode
->hdisplay
<< 16;
1443 ret
= update_output_state(state
, set
);
1447 ret
= drm_atomic_commit(state
);
1451 /* Driver takes ownership of state on successful commit. */
1454 if (ret
== -EDEADLK
)
1457 drm_atomic_state_free(state
);
1461 drm_atomic_state_clear(state
);
1462 drm_atomic_legacy_backoff(state
);
1465 * Someone might have exchanged the framebuffer while we dropped locks
1466 * in the backoff code. We need to fix up the fb refcount tracking the
1469 crtc
->primary
->old_fb
= crtc
->primary
->fb
;
1473 EXPORT_SYMBOL(drm_atomic_helper_set_config
);
1476 * drm_atomic_helper_crtc_set_property - helper for crtc prorties
1478 * @property: DRM property
1479 * @val: value of property
1481 * Provides a default plane disablle handler using the atomic driver interface.
1484 * Zero on success, error code on failure
1487 drm_atomic_helper_crtc_set_property(struct drm_crtc
*crtc
,
1488 struct drm_property
*property
,
1491 struct drm_atomic_state
*state
;
1492 struct drm_crtc_state
*crtc_state
;
1495 state
= drm_atomic_state_alloc(crtc
->dev
);
1499 /* ->set_property is always called with all locks held. */
1500 state
->acquire_ctx
= crtc
->dev
->mode_config
.acquire_ctx
;
1502 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1503 if (IS_ERR(crtc_state
)) {
1504 ret
= PTR_ERR(crtc_state
);
1508 ret
= crtc
->funcs
->atomic_set_property(crtc
, crtc_state
,
1513 ret
= drm_atomic_commit(state
);
1517 /* Driver takes ownership of state on successful commit. */
1520 if (ret
== -EDEADLK
)
1523 drm_atomic_state_free(state
);
1527 drm_atomic_state_clear(state
);
1528 drm_atomic_legacy_backoff(state
);
1532 EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property
);
1535 * drm_atomic_helper_plane_set_property - helper for plane prorties
1537 * @property: DRM property
1538 * @val: value of property
1540 * Provides a default plane disable handler using the atomic driver interface.
1543 * Zero on success, error code on failure
1546 drm_atomic_helper_plane_set_property(struct drm_plane
*plane
,
1547 struct drm_property
*property
,
1550 struct drm_atomic_state
*state
;
1551 struct drm_plane_state
*plane_state
;
1554 state
= drm_atomic_state_alloc(plane
->dev
);
1558 /* ->set_property is always called with all locks held. */
1559 state
->acquire_ctx
= plane
->dev
->mode_config
.acquire_ctx
;
1561 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1562 if (IS_ERR(plane_state
)) {
1563 ret
= PTR_ERR(plane_state
);
1567 ret
= plane
->funcs
->atomic_set_property(plane
, plane_state
,
1572 ret
= drm_atomic_commit(state
);
1576 /* Driver takes ownership of state on successful commit. */
1579 if (ret
== -EDEADLK
)
1582 drm_atomic_state_free(state
);
1586 drm_atomic_state_clear(state
);
1587 drm_atomic_legacy_backoff(state
);
1591 EXPORT_SYMBOL(drm_atomic_helper_plane_set_property
);
1594 * drm_atomic_helper_connector_set_property - helper for connector prorties
1595 * @connector: DRM connector
1596 * @property: DRM property
1597 * @val: value of property
1599 * Provides a default plane disablle handler using the atomic driver interface.
1602 * Zero on success, error code on failure
1605 drm_atomic_helper_connector_set_property(struct drm_connector
*connector
,
1606 struct drm_property
*property
,
1609 struct drm_atomic_state
*state
;
1610 struct drm_connector_state
*connector_state
;
1613 state
= drm_atomic_state_alloc(connector
->dev
);
1617 /* ->set_property is always called with all locks held. */
1618 state
->acquire_ctx
= connector
->dev
->mode_config
.acquire_ctx
;
1620 connector_state
= drm_atomic_get_connector_state(state
, connector
);
1621 if (IS_ERR(connector_state
)) {
1622 ret
= PTR_ERR(connector_state
);
1626 ret
= connector
->funcs
->atomic_set_property(connector
, connector_state
,
1631 ret
= drm_atomic_commit(state
);
1635 /* Driver takes ownership of state on successful commit. */
1638 if (ret
== -EDEADLK
)
1641 drm_atomic_state_free(state
);
1645 drm_atomic_state_clear(state
);
1646 drm_atomic_legacy_backoff(state
);
1650 EXPORT_SYMBOL(drm_atomic_helper_connector_set_property
);
1653 * drm_atomic_helper_page_flip - execute a legacy page flip
1655 * @fb: DRM framebuffer
1656 * @event: optional DRM event to signal upon completion
1657 * @flags: flip flags for non-vblank sync'ed updates
1659 * Provides a default page flip implementation using the atomic driver interface.
1661 * Note that for now so called async page flips (i.e. updates which are not
1662 * synchronized to vblank) are not supported, since the atomic interfaces have
1663 * no provisions for this yet.
1666 * Returns 0 on success, negative errno numbers on failure.
1668 int drm_atomic_helper_page_flip(struct drm_crtc
*crtc
,
1669 struct drm_framebuffer
*fb
,
1670 struct drm_pending_vblank_event
*event
,
1673 struct drm_plane
*plane
= crtc
->primary
;
1674 struct drm_atomic_state
*state
;
1675 struct drm_plane_state
*plane_state
;
1676 struct drm_crtc_state
*crtc_state
;
1679 if (flags
& DRM_MODE_PAGE_FLIP_ASYNC
)
1682 state
= drm_atomic_state_alloc(plane
->dev
);
1686 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
1688 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1689 if (IS_ERR(crtc_state
)) {
1690 ret
= PTR_ERR(crtc_state
);
1693 crtc_state
->event
= event
;
1695 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1696 if (IS_ERR(plane_state
)) {
1697 ret
= PTR_ERR(plane_state
);
1701 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
1704 drm_atomic_set_fb_for_plane(plane_state
, fb
);
1706 ret
= drm_atomic_async_commit(state
);
1710 /* TODO: ->page_flip is the only driver callback where the core
1711 * doesn't update plane->fb. For now patch it up here. */
1712 plane
->fb
= plane
->state
->fb
;
1714 /* Driver takes ownership of state on successful async commit. */
1717 if (ret
== -EDEADLK
)
1720 drm_atomic_state_free(state
);
1724 drm_atomic_state_clear(state
);
1725 drm_atomic_legacy_backoff(state
);
1728 * Someone might have exchanged the framebuffer while we dropped locks
1729 * in the backoff code. We need to fix up the fb refcount tracking the
1732 plane
->old_fb
= plane
->fb
;
1736 EXPORT_SYMBOL(drm_atomic_helper_page_flip
);
1739 * DOC: atomic state reset and initialization
1741 * Both the drm core and the atomic helpers assume that there is always the full
1742 * and correct atomic software state for all connectors, CRTCs and planes
1743 * available. Which is a bit a problem on driver load and also after system
1744 * suspend. One way to solve this is to have a hardware state read-out
1745 * infrastructure which reconstructs the full software state (e.g. the i915
1748 * The simpler solution is to just reset the software state to everything off,
1749 * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
1750 * the atomic helpers provide default reset implementations for all hooks.
1754 * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs
1757 * Resets the atomic state for @crtc by freeing the state pointer (which might
1758 * be NULL, e.g. at driver load time) and allocating a new empty state object.
1760 void drm_atomic_helper_crtc_reset(struct drm_crtc
*crtc
)
1763 crtc
->state
= kzalloc(sizeof(*crtc
->state
), GFP_KERNEL
);
1765 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset
);
1768 * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
1771 * Default CRTC state duplicate hook for drivers which don't have their own
1772 * subclassed CRTC state structure.
1774 struct drm_crtc_state
*
1775 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc
*crtc
)
1777 struct drm_crtc_state
*state
;
1779 if (WARN_ON(!crtc
->state
))
1782 state
= kmemdup(crtc
->state
, sizeof(*crtc
->state
), GFP_KERNEL
);
1785 state
->mode_changed
= false;
1786 state
->planes_changed
= false;
1787 state
->event
= NULL
;
1792 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state
);
1795 * drm_atomic_helper_crtc_destroy_state - default state destroy hook
1797 * @state: CRTC state object to release
1799 * Default CRTC state destroy hook for drivers which don't have their own
1800 * subclassed CRTC state structure.
1802 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc
*crtc
,
1803 struct drm_crtc_state
*state
)
1807 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state
);
1810 * drm_atomic_helper_plane_reset - default ->reset hook for planes
1813 * Resets the atomic state for @plane by freeing the state pointer (which might
1814 * be NULL, e.g. at driver load time) and allocating a new empty state object.
1816 void drm_atomic_helper_plane_reset(struct drm_plane
*plane
)
1818 if (plane
->state
&& plane
->state
->fb
)
1819 drm_framebuffer_unreference(plane
->state
->fb
);
1821 kfree(plane
->state
);
1822 plane
->state
= kzalloc(sizeof(*plane
->state
), GFP_KERNEL
);
1824 EXPORT_SYMBOL(drm_atomic_helper_plane_reset
);
1827 * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
1830 * Default plane state duplicate hook for drivers which don't have their own
1831 * subclassed plane state structure.
1833 struct drm_plane_state
*
1834 drm_atomic_helper_plane_duplicate_state(struct drm_plane
*plane
)
1836 struct drm_plane_state
*state
;
1838 if (WARN_ON(!plane
->state
))
1841 state
= kmemdup(plane
->state
, sizeof(*plane
->state
), GFP_KERNEL
);
1843 if (state
&& state
->fb
)
1844 drm_framebuffer_reference(state
->fb
);
1848 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state
);
1851 * drm_atomic_helper_plane_destroy_state - default state destroy hook
1853 * @state: plane state object to release
1855 * Default plane state destroy hook for drivers which don't have their own
1856 * subclassed plane state structure.
1858 void drm_atomic_helper_plane_destroy_state(struct drm_plane
*plane
,
1859 struct drm_plane_state
*state
)
1862 drm_framebuffer_unreference(state
->fb
);
1866 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state
);
1869 * drm_atomic_helper_connector_reset - default ->reset hook for connectors
1870 * @connector: drm connector
1872 * Resets the atomic state for @connector by freeing the state pointer (which
1873 * might be NULL, e.g. at driver load time) and allocating a new empty state
1876 void drm_atomic_helper_connector_reset(struct drm_connector
*connector
)
1878 kfree(connector
->state
);
1879 connector
->state
= kzalloc(sizeof(*connector
->state
), GFP_KERNEL
);
1881 EXPORT_SYMBOL(drm_atomic_helper_connector_reset
);
1884 * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
1885 * @connector: drm connector
1887 * Default connector state duplicate hook for drivers which don't have their own
1888 * subclassed connector state structure.
1890 struct drm_connector_state
*
1891 drm_atomic_helper_connector_duplicate_state(struct drm_connector
*connector
)
1893 if (WARN_ON(!connector
->state
))
1896 return kmemdup(connector
->state
, sizeof(*connector
->state
), GFP_KERNEL
);
1898 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state
);
1901 * drm_atomic_helper_connector_destroy_state - default state destroy hook
1902 * @connector: drm connector
1903 * @state: connector state object to release
1905 * Default connector state destroy hook for drivers which don't have their own
1906 * subclassed connector state structure.
1908 void drm_atomic_helper_connector_destroy_state(struct drm_connector
*connector
,
1909 struct drm_connector_state
*state
)
1913 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state
);