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/dma-fence.h>
35 #include "drm_crtc_helper_internal.h"
36 #include "drm_crtc_internal.h"
41 * This helper library provides implementations of check and commit functions on
42 * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
43 * also provides convenience implementations for the atomic state handling
44 * callbacks for drivers which don't need to subclass the drm core structures to
45 * add their own additional internal state.
47 * This library also provides default implementations for the check callback in
48 * drm_atomic_helper_check() and for the commit callback with
49 * drm_atomic_helper_commit(). But the individual stages and callbacks are
50 * exposed to allow drivers to mix and match and e.g. use the plane helpers only
51 * together with a driver private modeset implementation.
53 * This library also provides implementations for all the legacy driver
54 * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
55 * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the
56 * various functions to implement set_property callbacks. New drivers must not
57 * implement these functions themselves but must use the provided helpers.
59 * The atomic helper uses the same function table structures as all other
60 * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs,
61 * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It
62 * also shares the &struct drm_plane_helper_funcs function table with the plane
66 drm_atomic_helper_plane_changed(struct drm_atomic_state
*state
,
67 struct drm_plane_state
*old_plane_state
,
68 struct drm_plane_state
*plane_state
,
69 struct drm_plane
*plane
)
71 struct drm_crtc_state
*crtc_state
;
73 if (old_plane_state
->crtc
) {
74 crtc_state
= drm_atomic_get_new_crtc_state(state
,
75 old_plane_state
->crtc
);
77 if (WARN_ON(!crtc_state
))
80 crtc_state
->planes_changed
= true;
83 if (plane_state
->crtc
) {
84 crtc_state
= drm_atomic_get_new_crtc_state(state
, plane_state
->crtc
);
86 if (WARN_ON(!crtc_state
))
89 crtc_state
->planes_changed
= true;
93 static int handle_conflicting_encoders(struct drm_atomic_state
*state
,
94 bool disable_conflicting_encoders
)
96 struct drm_connector_state
*new_conn_state
;
97 struct drm_connector
*connector
;
98 struct drm_connector_list_iter conn_iter
;
99 struct drm_encoder
*encoder
;
100 unsigned encoder_mask
= 0;
104 * First loop, find all newly assigned encoders from the connectors
105 * part of the state. If the same encoder is assigned to multiple
106 * connectors bail out.
108 for_each_new_connector_in_state(state
, connector
, new_conn_state
, i
) {
109 const struct drm_connector_helper_funcs
*funcs
= connector
->helper_private
;
110 struct drm_encoder
*new_encoder
;
112 if (!new_conn_state
->crtc
)
115 if (funcs
->atomic_best_encoder
)
116 new_encoder
= funcs
->atomic_best_encoder(connector
, new_conn_state
);
117 else if (funcs
->best_encoder
)
118 new_encoder
= funcs
->best_encoder(connector
);
120 new_encoder
= drm_atomic_helper_best_encoder(connector
);
123 if (encoder_mask
& (1 << drm_encoder_index(new_encoder
))) {
124 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n",
125 new_encoder
->base
.id
, new_encoder
->name
,
126 connector
->base
.id
, connector
->name
);
131 encoder_mask
|= 1 << drm_encoder_index(new_encoder
);
139 * Second loop, iterate over all connectors not part of the state.
141 * If a conflicting encoder is found and disable_conflicting_encoders
142 * is not set, an error is returned. Userspace can provide a solution
143 * through the atomic ioctl.
145 * If the flag is set conflicting connectors are removed from the crtc
146 * and the crtc is disabled if no encoder is left. This preserves
147 * compatibility with the legacy set_config behavior.
149 drm_connector_list_iter_begin(state
->dev
, &conn_iter
);
150 drm_for_each_connector_iter(connector
, &conn_iter
) {
151 struct drm_crtc_state
*crtc_state
;
153 if (drm_atomic_get_new_connector_state(state
, connector
))
156 encoder
= connector
->state
->best_encoder
;
157 if (!encoder
|| !(encoder_mask
& (1 << drm_encoder_index(encoder
))))
160 if (!disable_conflicting_encoders
) {
161 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n",
162 encoder
->base
.id
, encoder
->name
,
163 connector
->state
->crtc
->base
.id
,
164 connector
->state
->crtc
->name
,
165 connector
->base
.id
, connector
->name
);
170 new_conn_state
= drm_atomic_get_connector_state(state
, connector
);
171 if (IS_ERR(new_conn_state
)) {
172 ret
= PTR_ERR(new_conn_state
);
176 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n",
177 encoder
->base
.id
, encoder
->name
,
178 new_conn_state
->crtc
->base
.id
, new_conn_state
->crtc
->name
,
179 connector
->base
.id
, connector
->name
);
181 crtc_state
= drm_atomic_get_new_crtc_state(state
, new_conn_state
->crtc
);
183 ret
= drm_atomic_set_crtc_for_connector(new_conn_state
, NULL
);
187 if (!crtc_state
->connector_mask
) {
188 ret
= drm_atomic_set_mode_prop_for_crtc(crtc_state
,
193 crtc_state
->active
= false;
197 drm_connector_list_iter_end(&conn_iter
);
203 set_best_encoder(struct drm_atomic_state
*state
,
204 struct drm_connector_state
*conn_state
,
205 struct drm_encoder
*encoder
)
207 struct drm_crtc_state
*crtc_state
;
208 struct drm_crtc
*crtc
;
210 if (conn_state
->best_encoder
) {
211 /* Unset the encoder_mask in the old crtc state. */
212 crtc
= conn_state
->connector
->state
->crtc
;
214 /* A NULL crtc is an error here because we should have
215 * duplicated a NULL best_encoder when crtc was NULL.
216 * As an exception restoring duplicated atomic state
217 * during resume is allowed, so don't warn when
218 * best_encoder is equal to encoder we intend to set.
220 WARN_ON(!crtc
&& encoder
!= conn_state
->best_encoder
);
222 crtc_state
= drm_atomic_get_new_crtc_state(state
, crtc
);
224 crtc_state
->encoder_mask
&=
225 ~(1 << drm_encoder_index(conn_state
->best_encoder
));
230 crtc
= conn_state
->crtc
;
233 crtc_state
= drm_atomic_get_new_crtc_state(state
, crtc
);
235 crtc_state
->encoder_mask
|=
236 1 << drm_encoder_index(encoder
);
240 conn_state
->best_encoder
= encoder
;
244 steal_encoder(struct drm_atomic_state
*state
,
245 struct drm_encoder
*encoder
)
247 struct drm_crtc_state
*crtc_state
;
248 struct drm_connector
*connector
;
249 struct drm_connector_state
*old_connector_state
, *new_connector_state
;
252 for_each_oldnew_connector_in_state(state
, connector
, old_connector_state
, new_connector_state
, i
) {
253 struct drm_crtc
*encoder_crtc
;
255 if (new_connector_state
->best_encoder
!= encoder
)
258 encoder_crtc
= old_connector_state
->crtc
;
260 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
261 encoder
->base
.id
, encoder
->name
,
262 encoder_crtc
->base
.id
, encoder_crtc
->name
);
264 set_best_encoder(state
, new_connector_state
, NULL
);
266 crtc_state
= drm_atomic_get_new_crtc_state(state
, encoder_crtc
);
267 crtc_state
->connectors_changed
= true;
274 update_connector_routing(struct drm_atomic_state
*state
,
275 struct drm_connector
*connector
,
276 struct drm_connector_state
*old_connector_state
,
277 struct drm_connector_state
*new_connector_state
)
279 const struct drm_connector_helper_funcs
*funcs
;
280 struct drm_encoder
*new_encoder
;
281 struct drm_crtc_state
*crtc_state
;
283 DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n",
287 if (old_connector_state
->crtc
!= new_connector_state
->crtc
) {
288 if (old_connector_state
->crtc
) {
289 crtc_state
= drm_atomic_get_new_crtc_state(state
, old_connector_state
->crtc
);
290 crtc_state
->connectors_changed
= true;
293 if (new_connector_state
->crtc
) {
294 crtc_state
= drm_atomic_get_new_crtc_state(state
, new_connector_state
->crtc
);
295 crtc_state
->connectors_changed
= true;
299 if (!new_connector_state
->crtc
) {
300 DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
304 set_best_encoder(state
, new_connector_state
, NULL
);
309 funcs
= connector
->helper_private
;
311 if (funcs
->atomic_best_encoder
)
312 new_encoder
= funcs
->atomic_best_encoder(connector
,
313 new_connector_state
);
314 else if (funcs
->best_encoder
)
315 new_encoder
= funcs
->best_encoder(connector
);
317 new_encoder
= drm_atomic_helper_best_encoder(connector
);
320 DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
326 if (!drm_encoder_crtc_ok(new_encoder
, new_connector_state
->crtc
)) {
327 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n",
328 new_encoder
->base
.id
,
330 new_connector_state
->crtc
->base
.id
,
331 new_connector_state
->crtc
->name
);
335 if (new_encoder
== new_connector_state
->best_encoder
) {
336 set_best_encoder(state
, new_connector_state
, new_encoder
);
338 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
341 new_encoder
->base
.id
,
343 new_connector_state
->crtc
->base
.id
,
344 new_connector_state
->crtc
->name
);
349 steal_encoder(state
, new_encoder
);
351 set_best_encoder(state
, new_connector_state
, new_encoder
);
353 crtc_state
= drm_atomic_get_new_crtc_state(state
, new_connector_state
->crtc
);
354 crtc_state
->connectors_changed
= true;
356 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
359 new_encoder
->base
.id
,
361 new_connector_state
->crtc
->base
.id
,
362 new_connector_state
->crtc
->name
);
368 mode_fixup(struct drm_atomic_state
*state
)
370 struct drm_crtc
*crtc
;
371 struct drm_crtc_state
*new_crtc_state
;
372 struct drm_connector
*connector
;
373 struct drm_connector_state
*new_conn_state
;
377 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
) {
378 if (!new_crtc_state
->mode_changed
&&
379 !new_crtc_state
->connectors_changed
)
382 drm_mode_copy(&new_crtc_state
->adjusted_mode
, &new_crtc_state
->mode
);
385 for_each_new_connector_in_state(state
, connector
, new_conn_state
, i
) {
386 const struct drm_encoder_helper_funcs
*funcs
;
387 struct drm_encoder
*encoder
;
389 WARN_ON(!!new_conn_state
->best_encoder
!= !!new_conn_state
->crtc
);
391 if (!new_conn_state
->crtc
|| !new_conn_state
->best_encoder
)
395 drm_atomic_get_new_crtc_state(state
, new_conn_state
->crtc
);
398 * Each encoder has at most one connector (since we always steal
399 * it away), so we won't call ->mode_fixup twice.
401 encoder
= new_conn_state
->best_encoder
;
402 funcs
= encoder
->helper_private
;
404 ret
= drm_bridge_mode_fixup(encoder
->bridge
, &new_crtc_state
->mode
,
405 &new_crtc_state
->adjusted_mode
);
407 DRM_DEBUG_ATOMIC("Bridge fixup failed\n");
411 if (funcs
&& funcs
->atomic_check
) {
412 ret
= funcs
->atomic_check(encoder
, new_crtc_state
,
415 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n",
416 encoder
->base
.id
, encoder
->name
);
419 } else if (funcs
&& funcs
->mode_fixup
) {
420 ret
= funcs
->mode_fixup(encoder
, &new_crtc_state
->mode
,
421 &new_crtc_state
->adjusted_mode
);
423 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n",
424 encoder
->base
.id
, encoder
->name
);
430 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
) {
431 const struct drm_crtc_helper_funcs
*funcs
;
433 if (!new_crtc_state
->enable
)
436 if (!new_crtc_state
->mode_changed
&&
437 !new_crtc_state
->connectors_changed
)
440 funcs
= crtc
->helper_private
;
441 if (!funcs
->mode_fixup
)
444 ret
= funcs
->mode_fixup(crtc
, &new_crtc_state
->mode
,
445 &new_crtc_state
->adjusted_mode
);
447 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n",
448 crtc
->base
.id
, crtc
->name
);
456 static enum drm_mode_status
mode_valid_path(struct drm_connector
*connector
,
457 struct drm_encoder
*encoder
,
458 struct drm_crtc
*crtc
,
459 struct drm_display_mode
*mode
)
461 enum drm_mode_status ret
;
463 ret
= drm_encoder_mode_valid(encoder
, mode
);
464 if (ret
!= MODE_OK
) {
465 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n",
466 encoder
->base
.id
, encoder
->name
);
470 ret
= drm_bridge_mode_valid(encoder
->bridge
, mode
);
471 if (ret
!= MODE_OK
) {
472 DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n");
476 ret
= drm_crtc_mode_valid(crtc
, mode
);
477 if (ret
!= MODE_OK
) {
478 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n",
479 crtc
->base
.id
, crtc
->name
);
487 mode_valid(struct drm_atomic_state
*state
)
489 struct drm_connector_state
*conn_state
;
490 struct drm_connector
*connector
;
493 for_each_new_connector_in_state(state
, connector
, conn_state
, i
) {
494 struct drm_encoder
*encoder
= conn_state
->best_encoder
;
495 struct drm_crtc
*crtc
= conn_state
->crtc
;
496 struct drm_crtc_state
*crtc_state
;
497 enum drm_mode_status mode_status
;
498 struct drm_display_mode
*mode
;
500 if (!crtc
|| !encoder
)
503 crtc_state
= drm_atomic_get_new_crtc_state(state
, crtc
);
506 if (!crtc_state
->mode_changed
&& !crtc_state
->connectors_changed
)
509 mode
= &crtc_state
->mode
;
511 mode_status
= mode_valid_path(connector
, encoder
, crtc
, mode
);
512 if (mode_status
!= MODE_OK
)
520 * drm_atomic_helper_check_modeset - validate state object for modeset changes
522 * @state: the driver state object
524 * Check the state object to see if the requested state is physically possible.
525 * This does all the crtc and connector related computations for an atomic
526 * update and adds any additional connectors needed for full modesets. It calls
527 * the various per-object callbacks in the follow order:
529 * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder.
530 * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state.
531 * 3. If it's determined a modeset is needed then all connectors on the affected crtc
532 * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them.
533 * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and
534 * &drm_crtc_helper_funcs.mode_valid are called on the affected components.
535 * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges.
536 * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state.
537 * This function is only called when the encoder will be part of a configured crtc,
538 * it must not be used for implementing connector property validation.
539 * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called
541 * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints.
543 * &drm_crtc_state.mode_changed is set when the input mode is changed.
544 * &drm_crtc_state.connectors_changed is set when a connector is added or
545 * removed from the crtc. &drm_crtc_state.active_changed is set when
546 * &drm_crtc_state.active changes, which is used for DPMS.
547 * See also: drm_atomic_crtc_needs_modeset()
551 * Drivers which set &drm_crtc_state.mode_changed (e.g. in their
552 * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done
553 * without a full modeset) _must_ call this function afterwards after that
554 * change. It is permitted to call this function multiple times for the same
555 * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend
556 * upon the adjusted dotclock for fifo space allocation and watermark
560 * Zero for success or -errno
563 drm_atomic_helper_check_modeset(struct drm_device
*dev
,
564 struct drm_atomic_state
*state
)
566 struct drm_crtc
*crtc
;
567 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
568 struct drm_connector
*connector
;
569 struct drm_connector_state
*old_connector_state
, *new_connector_state
;
571 unsigned connectors_mask
= 0;
573 for_each_oldnew_crtc_in_state(state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
574 bool has_connectors
=
575 !!new_crtc_state
->connector_mask
;
577 WARN_ON(!drm_modeset_is_locked(&crtc
->mutex
));
579 if (!drm_mode_equal(&old_crtc_state
->mode
, &new_crtc_state
->mode
)) {
580 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
581 crtc
->base
.id
, crtc
->name
);
582 new_crtc_state
->mode_changed
= true;
585 if (old_crtc_state
->enable
!= new_crtc_state
->enable
) {
586 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n",
587 crtc
->base
.id
, crtc
->name
);
590 * For clarity this assignment is done here, but
591 * enable == 0 is only true when there are no
592 * connectors and a NULL mode.
594 * The other way around is true as well. enable != 0
595 * iff connectors are attached and a mode is set.
597 new_crtc_state
->mode_changed
= true;
598 new_crtc_state
->connectors_changed
= true;
601 if (old_crtc_state
->active
!= new_crtc_state
->active
) {
602 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
603 crtc
->base
.id
, crtc
->name
);
604 new_crtc_state
->active_changed
= true;
607 if (new_crtc_state
->enable
!= has_connectors
) {
608 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
609 crtc
->base
.id
, crtc
->name
);
615 ret
= handle_conflicting_encoders(state
, false);
619 for_each_oldnew_connector_in_state(state
, connector
, old_connector_state
, new_connector_state
, i
) {
620 const struct drm_connector_helper_funcs
*funcs
= connector
->helper_private
;
622 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
625 * This only sets crtc->connectors_changed for routing changes,
626 * drivers must set crtc->connectors_changed themselves when
627 * connector properties need to be updated.
629 ret
= update_connector_routing(state
, connector
,
631 new_connector_state
);
634 if (old_connector_state
->crtc
) {
635 new_crtc_state
= drm_atomic_get_new_crtc_state(state
,
636 old_connector_state
->crtc
);
637 if (old_connector_state
->link_status
!=
638 new_connector_state
->link_status
)
639 new_crtc_state
->connectors_changed
= true;
642 if (funcs
->atomic_check
)
643 ret
= funcs
->atomic_check(connector
, new_connector_state
);
647 connectors_mask
+= BIT(i
);
651 * After all the routing has been prepared we need to add in any
652 * connector which is itself unchanged, but who's crtc changes it's
653 * configuration. This must be done before calling mode_fixup in case a
654 * crtc only changed its mode but has the same set of connectors.
656 for_each_oldnew_crtc_in_state(state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
657 if (!drm_atomic_crtc_needs_modeset(new_crtc_state
))
660 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
661 crtc
->base
.id
, crtc
->name
,
662 new_crtc_state
->enable
? 'y' : 'n',
663 new_crtc_state
->active
? 'y' : 'n');
665 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
669 ret
= drm_atomic_add_affected_planes(state
, crtc
);
675 * Iterate over all connectors again, to make sure atomic_check()
676 * has been called on them when a modeset is forced.
678 for_each_oldnew_connector_in_state(state
, connector
, old_connector_state
, new_connector_state
, i
) {
679 const struct drm_connector_helper_funcs
*funcs
= connector
->helper_private
;
681 if (connectors_mask
& BIT(i
))
684 if (funcs
->atomic_check
)
685 ret
= funcs
->atomic_check(connector
, new_connector_state
);
690 ret
= mode_valid(state
);
694 return mode_fixup(state
);
696 EXPORT_SYMBOL(drm_atomic_helper_check_modeset
);
699 * drm_atomic_helper_check_planes - validate state object for planes changes
701 * @state: the driver state object
703 * Check the state object to see if the requested state is physically possible.
704 * This does all the plane update related checks using by calling into the
705 * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check
706 * hooks provided by the driver.
708 * It also sets &drm_crtc_state.planes_changed to indicate that a crtc has
712 * Zero for success or -errno
715 drm_atomic_helper_check_planes(struct drm_device
*dev
,
716 struct drm_atomic_state
*state
)
718 struct drm_crtc
*crtc
;
719 struct drm_crtc_state
*new_crtc_state
;
720 struct drm_plane
*plane
;
721 struct drm_plane_state
*new_plane_state
, *old_plane_state
;
724 for_each_oldnew_plane_in_state(state
, plane
, old_plane_state
, new_plane_state
, i
) {
725 const struct drm_plane_helper_funcs
*funcs
;
727 WARN_ON(!drm_modeset_is_locked(&plane
->mutex
));
729 funcs
= plane
->helper_private
;
731 drm_atomic_helper_plane_changed(state
, old_plane_state
, new_plane_state
, plane
);
733 if (!funcs
|| !funcs
->atomic_check
)
736 ret
= funcs
->atomic_check(plane
, new_plane_state
);
738 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n",
739 plane
->base
.id
, plane
->name
);
744 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
) {
745 const struct drm_crtc_helper_funcs
*funcs
;
747 funcs
= crtc
->helper_private
;
749 if (!funcs
|| !funcs
->atomic_check
)
752 ret
= funcs
->atomic_check(crtc
, new_crtc_state
);
754 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n",
755 crtc
->base
.id
, crtc
->name
);
762 EXPORT_SYMBOL(drm_atomic_helper_check_planes
);
765 * drm_atomic_helper_check - validate state object
767 * @state: the driver state object
769 * Check the state object to see if the requested state is physically possible.
770 * Only crtcs and planes have check callbacks, so for any additional (global)
771 * checking that a driver needs it can simply wrap that around this function.
772 * Drivers without such needs can directly use this as their
773 * &drm_mode_config_funcs.atomic_check callback.
775 * This just wraps the two parts of the state checking for planes and modeset
776 * state in the default order: First it calls drm_atomic_helper_check_modeset()
777 * and then drm_atomic_helper_check_planes(). The assumption is that the
778 * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check
779 * functions depend upon an updated adjusted_mode.clock to e.g. properly compute
783 * Zero for success or -errno
785 int drm_atomic_helper_check(struct drm_device
*dev
,
786 struct drm_atomic_state
*state
)
790 ret
= drm_atomic_helper_check_modeset(dev
, state
);
794 ret
= drm_atomic_helper_check_planes(dev
, state
);
798 if (state
->legacy_cursor_update
)
799 state
->async_update
= !drm_atomic_helper_async_check(dev
, state
);
803 EXPORT_SYMBOL(drm_atomic_helper_check
);
806 disable_outputs(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
808 struct drm_connector
*connector
;
809 struct drm_connector_state
*old_conn_state
, *new_conn_state
;
810 struct drm_crtc
*crtc
;
811 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
814 for_each_oldnew_connector_in_state(old_state
, connector
, old_conn_state
, new_conn_state
, i
) {
815 const struct drm_encoder_helper_funcs
*funcs
;
816 struct drm_encoder
*encoder
;
818 /* Shut down everything that's in the changeset and currently
819 * still on. So need to check the old, saved state. */
820 if (!old_conn_state
->crtc
)
823 old_crtc_state
= drm_atomic_get_old_crtc_state(old_state
, old_conn_state
->crtc
);
825 if (!old_crtc_state
->active
||
826 !drm_atomic_crtc_needs_modeset(old_conn_state
->crtc
->state
))
829 encoder
= old_conn_state
->best_encoder
;
831 /* We shouldn't get this far if we didn't previously have
832 * an encoder.. but WARN_ON() rather than explode.
834 if (WARN_ON(!encoder
))
837 funcs
= encoder
->helper_private
;
839 DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
840 encoder
->base
.id
, encoder
->name
);
843 * Each encoder has at most one connector (since we always steal
844 * it away), so we won't call disable hooks twice.
846 drm_bridge_disable(encoder
->bridge
);
848 /* Right function depends upon target state. */
850 if (new_conn_state
->crtc
&& funcs
->prepare
)
851 funcs
->prepare(encoder
);
852 else if (funcs
->disable
)
853 funcs
->disable(encoder
);
854 else if (funcs
->dpms
)
855 funcs
->dpms(encoder
, DRM_MODE_DPMS_OFF
);
858 drm_bridge_post_disable(encoder
->bridge
);
861 for_each_oldnew_crtc_in_state(old_state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
862 const struct drm_crtc_helper_funcs
*funcs
;
864 /* Shut down everything that needs a full modeset. */
865 if (!drm_atomic_crtc_needs_modeset(new_crtc_state
))
868 if (!old_crtc_state
->active
)
871 funcs
= crtc
->helper_private
;
873 DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n",
874 crtc
->base
.id
, crtc
->name
);
877 /* Right function depends upon target state. */
878 if (new_crtc_state
->enable
&& funcs
->prepare
)
879 funcs
->prepare(crtc
);
880 else if (funcs
->atomic_disable
)
881 funcs
->atomic_disable(crtc
, old_crtc_state
);
882 else if (funcs
->disable
)
883 funcs
->disable(crtc
);
885 funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
890 * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
892 * @old_state: atomic state object with old state structures
894 * This function updates all the various legacy modeset state pointers in
895 * connectors, encoders and crtcs. It also updates the timestamping constants
896 * used for precise vblank timestamps by calling
897 * drm_calc_timestamping_constants().
899 * Drivers can use this for building their own atomic commit if they don't have
900 * a pure helper-based modeset implementation.
903 drm_atomic_helper_update_legacy_modeset_state(struct drm_device
*dev
,
904 struct drm_atomic_state
*old_state
)
906 struct drm_connector
*connector
;
907 struct drm_connector_state
*old_conn_state
, *new_conn_state
;
908 struct drm_crtc
*crtc
;
909 struct drm_crtc_state
*new_crtc_state
;
912 /* clear out existing links and update dpms */
913 for_each_oldnew_connector_in_state(old_state
, connector
, old_conn_state
, new_conn_state
, i
) {
914 if (connector
->encoder
) {
915 WARN_ON(!connector
->encoder
->crtc
);
917 connector
->encoder
->crtc
= NULL
;
918 connector
->encoder
= NULL
;
921 crtc
= new_conn_state
->crtc
;
922 if ((!crtc
&& old_conn_state
->crtc
) ||
923 (crtc
&& drm_atomic_crtc_needs_modeset(crtc
->state
))) {
924 int mode
= DRM_MODE_DPMS_OFF
;
926 if (crtc
&& crtc
->state
->active
)
927 mode
= DRM_MODE_DPMS_ON
;
929 connector
->dpms
= mode
;
934 for_each_new_connector_in_state(old_state
, connector
, new_conn_state
, i
) {
935 if (!new_conn_state
->crtc
)
938 if (WARN_ON(!new_conn_state
->best_encoder
))
941 connector
->encoder
= new_conn_state
->best_encoder
;
942 connector
->encoder
->crtc
= new_conn_state
->crtc
;
945 /* set legacy state in the crtc structure */
946 for_each_new_crtc_in_state(old_state
, crtc
, new_crtc_state
, i
) {
947 struct drm_plane
*primary
= crtc
->primary
;
948 struct drm_plane_state
*new_plane_state
;
950 crtc
->mode
= new_crtc_state
->mode
;
951 crtc
->enabled
= new_crtc_state
->enable
;
954 drm_atomic_get_new_plane_state(old_state
, primary
);
956 if (new_plane_state
&& new_plane_state
->crtc
== crtc
) {
957 crtc
->x
= new_plane_state
->src_x
>> 16;
958 crtc
->y
= new_plane_state
->src_y
>> 16;
961 if (new_crtc_state
->enable
)
962 drm_calc_timestamping_constants(crtc
,
963 &new_crtc_state
->adjusted_mode
);
966 EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state
);
969 crtc_set_mode(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
971 struct drm_crtc
*crtc
;
972 struct drm_crtc_state
*new_crtc_state
;
973 struct drm_connector
*connector
;
974 struct drm_connector_state
*new_conn_state
;
977 for_each_new_crtc_in_state(old_state
, crtc
, new_crtc_state
, i
) {
978 const struct drm_crtc_helper_funcs
*funcs
;
980 if (!new_crtc_state
->mode_changed
)
983 funcs
= crtc
->helper_private
;
985 if (new_crtc_state
->enable
&& funcs
->mode_set_nofb
) {
986 DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n",
987 crtc
->base
.id
, crtc
->name
);
989 funcs
->mode_set_nofb(crtc
);
993 for_each_new_connector_in_state(old_state
, connector
, new_conn_state
, i
) {
994 const struct drm_encoder_helper_funcs
*funcs
;
995 struct drm_encoder
*encoder
;
996 struct drm_display_mode
*mode
, *adjusted_mode
;
998 if (!new_conn_state
->best_encoder
)
1001 encoder
= new_conn_state
->best_encoder
;
1002 funcs
= encoder
->helper_private
;
1003 new_crtc_state
= new_conn_state
->crtc
->state
;
1004 mode
= &new_crtc_state
->mode
;
1005 adjusted_mode
= &new_crtc_state
->adjusted_mode
;
1007 if (!new_crtc_state
->mode_changed
)
1010 DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n",
1011 encoder
->base
.id
, encoder
->name
);
1014 * Each encoder has at most one connector (since we always steal
1015 * it away), so we won't call mode_set hooks twice.
1017 if (funcs
&& funcs
->atomic_mode_set
) {
1018 funcs
->atomic_mode_set(encoder
, new_crtc_state
,
1020 } else if (funcs
&& funcs
->mode_set
) {
1021 funcs
->mode_set(encoder
, mode
, adjusted_mode
);
1024 drm_bridge_mode_set(encoder
->bridge
, mode
, adjusted_mode
);
1029 * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
1031 * @old_state: atomic state object with old state structures
1033 * This function shuts down all the outputs that need to be shut down and
1034 * prepares them (if required) with the new mode.
1036 * For compatibility with legacy crtc helpers this should be called before
1037 * drm_atomic_helper_commit_planes(), which is what the default commit function
1038 * does. But drivers with different needs can group the modeset commits together
1039 * and do the plane commits at the end. This is useful for drivers doing runtime
1040 * PM since planes updates then only happen when the CRTC is actually enabled.
1042 void drm_atomic_helper_commit_modeset_disables(struct drm_device
*dev
,
1043 struct drm_atomic_state
*old_state
)
1045 disable_outputs(dev
, old_state
);
1047 drm_atomic_helper_update_legacy_modeset_state(dev
, old_state
);
1049 crtc_set_mode(dev
, old_state
);
1051 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables
);
1054 * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
1056 * @old_state: atomic state object with old state structures
1058 * This function enables all the outputs with the new configuration which had to
1059 * be turned off for the update.
1061 * For compatibility with legacy crtc helpers this should be called after
1062 * drm_atomic_helper_commit_planes(), which is what the default commit function
1063 * does. But drivers with different needs can group the modeset commits together
1064 * and do the plane commits at the end. This is useful for drivers doing runtime
1065 * PM since planes updates then only happen when the CRTC is actually enabled.
1067 void drm_atomic_helper_commit_modeset_enables(struct drm_device
*dev
,
1068 struct drm_atomic_state
*old_state
)
1070 struct drm_crtc
*crtc
;
1071 struct drm_crtc_state
*old_crtc_state
;
1072 struct drm_crtc_state
*new_crtc_state
;
1073 struct drm_connector
*connector
;
1074 struct drm_connector_state
*new_conn_state
;
1077 for_each_oldnew_crtc_in_state(old_state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
1078 const struct drm_crtc_helper_funcs
*funcs
;
1080 /* Need to filter out CRTCs where only planes change. */
1081 if (!drm_atomic_crtc_needs_modeset(new_crtc_state
))
1084 if (!new_crtc_state
->active
)
1087 funcs
= crtc
->helper_private
;
1089 if (new_crtc_state
->enable
) {
1090 DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
1091 crtc
->base
.id
, crtc
->name
);
1093 if (funcs
->atomic_enable
)
1094 funcs
->atomic_enable(crtc
, old_crtc_state
);
1096 funcs
->commit(crtc
);
1100 for_each_new_connector_in_state(old_state
, connector
, new_conn_state
, i
) {
1101 const struct drm_encoder_helper_funcs
*funcs
;
1102 struct drm_encoder
*encoder
;
1104 if (!new_conn_state
->best_encoder
)
1107 if (!new_conn_state
->crtc
->state
->active
||
1108 !drm_atomic_crtc_needs_modeset(new_conn_state
->crtc
->state
))
1111 encoder
= new_conn_state
->best_encoder
;
1112 funcs
= encoder
->helper_private
;
1114 DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
1115 encoder
->base
.id
, encoder
->name
);
1118 * Each encoder has at most one connector (since we always steal
1119 * it away), so we won't call enable hooks twice.
1121 drm_bridge_pre_enable(encoder
->bridge
);
1125 funcs
->enable(encoder
);
1126 else if (funcs
->commit
)
1127 funcs
->commit(encoder
);
1130 drm_bridge_enable(encoder
->bridge
);
1133 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables
);
1136 * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
1138 * @state: atomic state object with old state structures
1139 * @pre_swap: If true, do an interruptible wait, and @state is the new state.
1140 * Otherwise @state is the old state.
1142 * For implicit sync, driver should fish the exclusive fence out from the
1143 * incoming fb's and stash it in the drm_plane_state. This is called after
1144 * drm_atomic_helper_swap_state() so it uses the current plane state (and
1145 * just uses the atomic state to find the changed planes)
1147 * Note that @pre_swap is needed since the point where we block for fences moves
1148 * around depending upon whether an atomic commit is blocking or
1149 * non-blocking. For non-blocking commit all waiting needs to happen after
1150 * drm_atomic_helper_swap_state() is called, but for blocking commits we want
1151 * to wait **before** we do anything that can't be easily rolled back. That is
1152 * before we call drm_atomic_helper_swap_state().
1154 * Returns zero if success or < 0 if dma_fence_wait() fails.
1156 int drm_atomic_helper_wait_for_fences(struct drm_device
*dev
,
1157 struct drm_atomic_state
*state
,
1160 struct drm_plane
*plane
;
1161 struct drm_plane_state
*new_plane_state
;
1164 for_each_new_plane_in_state(state
, plane
, new_plane_state
, i
) {
1165 if (!new_plane_state
->fence
)
1168 WARN_ON(!new_plane_state
->fb
);
1171 * If waiting for fences pre-swap (ie: nonblock), userspace can
1172 * still interrupt the operation. Instead of blocking until the
1173 * timer expires, make the wait interruptible.
1175 ret
= dma_fence_wait(new_plane_state
->fence
, pre_swap
);
1179 dma_fence_put(new_plane_state
->fence
);
1180 new_plane_state
->fence
= NULL
;
1185 EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences
);
1188 * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs
1190 * @old_state: atomic state object with old state structures
1192 * Helper to, after atomic commit, wait for vblanks on all effected
1193 * crtcs (ie. before cleaning up old framebuffers using
1194 * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the
1195 * framebuffers have actually changed to optimize for the legacy cursor and
1196 * plane update use-case.
1198 * Drivers using the nonblocking commit tracking support initialized by calling
1199 * drm_atomic_helper_setup_commit() should look at
1200 * drm_atomic_helper_wait_for_flip_done() as an alternative.
1203 drm_atomic_helper_wait_for_vblanks(struct drm_device
*dev
,
1204 struct drm_atomic_state
*old_state
)
1206 struct drm_crtc
*crtc
;
1207 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
1209 unsigned crtc_mask
= 0;
1212 * Legacy cursor ioctls are completely unsynced, and userspace
1213 * relies on that (by doing tons of cursor updates).
1215 if (old_state
->legacy_cursor_update
)
1218 for_each_oldnew_crtc_in_state(old_state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
1219 if (!new_crtc_state
->active
|| !new_crtc_state
->planes_changed
)
1222 ret
= drm_crtc_vblank_get(crtc
);
1226 crtc_mask
|= drm_crtc_mask(crtc
);
1227 old_state
->crtcs
[i
].last_vblank_count
= drm_crtc_vblank_count(crtc
);
1230 for_each_old_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
1231 if (!(crtc_mask
& drm_crtc_mask(crtc
)))
1234 ret
= wait_event_timeout(dev
->vblank
[i
].queue
,
1235 old_state
->crtcs
[i
].last_vblank_count
!=
1236 drm_crtc_vblank_count(crtc
),
1237 msecs_to_jiffies(50));
1239 WARN(!ret
, "[CRTC:%d:%s] vblank wait timed out\n",
1240 crtc
->base
.id
, crtc
->name
);
1242 drm_crtc_vblank_put(crtc
);
1245 EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks
);
1248 * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done
1250 * @old_state: atomic state object with old state structures
1252 * Helper to, after atomic commit, wait for page flips on all effected
1253 * crtcs (ie. before cleaning up old framebuffers using
1254 * drm_atomic_helper_cleanup_planes()). Compared to
1255 * drm_atomic_helper_wait_for_vblanks() this waits for the completion of on all
1256 * CRTCs, assuming that cursors-only updates are signalling their completion
1257 * immediately (or using a different path).
1259 * This requires that drivers use the nonblocking commit tracking support
1260 * initialized using drm_atomic_helper_setup_commit().
1262 void drm_atomic_helper_wait_for_flip_done(struct drm_device
*dev
,
1263 struct drm_atomic_state
*old_state
)
1265 struct drm_crtc_state
*unused
;
1266 struct drm_crtc
*crtc
;
1269 for_each_new_crtc_in_state(old_state
, crtc
, unused
, i
) {
1270 struct drm_crtc_commit
*commit
= old_state
->crtcs
[i
].commit
;
1276 ret
= wait_for_completion_timeout(&commit
->flip_done
, 10 * HZ
);
1278 DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1279 crtc
->base
.id
, crtc
->name
);
1282 EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done
);
1285 * drm_atomic_helper_commit_tail - commit atomic update to hardware
1286 * @old_state: atomic state object with old state structures
1288 * This is the default implementation for the
1289 * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
1290 * that do not support runtime_pm or do not need the CRTC to be
1291 * enabled to perform a commit. Otherwise, see
1292 * drm_atomic_helper_commit_tail_rpm().
1294 * Note that the default ordering of how the various stages are called is to
1295 * match the legacy modeset helper library closest.
1297 void drm_atomic_helper_commit_tail(struct drm_atomic_state
*old_state
)
1299 struct drm_device
*dev
= old_state
->dev
;
1301 drm_atomic_helper_commit_modeset_disables(dev
, old_state
);
1303 drm_atomic_helper_commit_planes(dev
, old_state
, 0);
1305 drm_atomic_helper_commit_modeset_enables(dev
, old_state
);
1307 drm_atomic_helper_commit_hw_done(old_state
);
1309 drm_atomic_helper_wait_for_vblanks(dev
, old_state
);
1311 drm_atomic_helper_cleanup_planes(dev
, old_state
);
1313 EXPORT_SYMBOL(drm_atomic_helper_commit_tail
);
1316 * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware
1317 * @old_state: new modeset state to be committed
1319 * This is an alternative implementation for the
1320 * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
1321 * that support runtime_pm or need the CRTC to be enabled to perform a
1322 * commit. Otherwise, one should use the default implementation
1323 * drm_atomic_helper_commit_tail().
1325 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state
*old_state
)
1327 struct drm_device
*dev
= old_state
->dev
;
1329 drm_atomic_helper_commit_modeset_disables(dev
, old_state
);
1331 drm_atomic_helper_commit_modeset_enables(dev
, old_state
);
1333 drm_atomic_helper_commit_planes(dev
, old_state
,
1334 DRM_PLANE_COMMIT_ACTIVE_ONLY
);
1336 drm_atomic_helper_commit_hw_done(old_state
);
1338 drm_atomic_helper_wait_for_vblanks(dev
, old_state
);
1340 drm_atomic_helper_cleanup_planes(dev
, old_state
);
1342 EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm
);
1344 static void commit_tail(struct drm_atomic_state
*old_state
)
1346 struct drm_device
*dev
= old_state
->dev
;
1347 const struct drm_mode_config_helper_funcs
*funcs
;
1349 funcs
= dev
->mode_config
.helper_private
;
1351 drm_atomic_helper_wait_for_fences(dev
, old_state
, false);
1353 drm_atomic_helper_wait_for_dependencies(old_state
);
1355 if (funcs
&& funcs
->atomic_commit_tail
)
1356 funcs
->atomic_commit_tail(old_state
);
1358 drm_atomic_helper_commit_tail(old_state
);
1360 drm_atomic_helper_commit_cleanup_done(old_state
);
1362 drm_atomic_state_put(old_state
);
1365 static void commit_work(struct work_struct
*work
)
1367 struct drm_atomic_state
*state
= container_of(work
,
1368 struct drm_atomic_state
,
1374 * drm_atomic_helper_async_check - check if state can be commited asynchronously
1376 * @state: the driver state object
1378 * This helper will check if it is possible to commit the state asynchronously.
1379 * Async commits are not supposed to swap the states like normal sync commits
1380 * but just do in-place changes on the current state.
1382 * It will return 0 if the commit can happen in an asynchronous fashion or error
1383 * if not. Note that error just mean it can't be commited asynchronously, if it
1384 * fails the commit should be treated like a normal synchronous commit.
1386 int drm_atomic_helper_async_check(struct drm_device
*dev
,
1387 struct drm_atomic_state
*state
)
1389 struct drm_crtc
*crtc
;
1390 struct drm_crtc_state
*crtc_state
;
1391 struct drm_crtc_commit
*commit
;
1392 struct drm_plane
*__plane
, *plane
= NULL
;
1393 struct drm_plane_state
*__plane_state
, *plane_state
= NULL
;
1394 const struct drm_plane_helper_funcs
*funcs
;
1395 int i
, j
, n_planes
= 0;
1397 for_each_new_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1398 if (drm_atomic_crtc_needs_modeset(crtc_state
))
1402 for_each_new_plane_in_state(state
, __plane
, __plane_state
, i
) {
1405 plane_state
= __plane_state
;
1408 /* FIXME: we support only single plane updates for now */
1409 if (!plane
|| n_planes
!= 1)
1412 if (!plane_state
->crtc
)
1415 funcs
= plane
->helper_private
;
1416 if (!funcs
->atomic_async_update
)
1419 if (plane_state
->fence
)
1423 * Don't do an async update if there is an outstanding commit modifying
1424 * the plane. This prevents our async update's changes from getting
1425 * overridden by a previous synchronous update's state.
1427 for_each_new_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1428 if (plane
->crtc
!= crtc
)
1431 spin_lock(&crtc
->commit_lock
);
1432 commit
= list_first_entry_or_null(&crtc
->commit_list
,
1433 struct drm_crtc_commit
,
1436 spin_unlock(&crtc
->commit_lock
);
1439 spin_unlock(&crtc
->commit_lock
);
1441 if (!crtc
->state
->state
)
1444 for_each_plane_in_state(crtc
->state
->state
, __plane
,
1446 if (__plane
== plane
)
1451 return funcs
->atomic_async_check(plane
, plane_state
);
1453 EXPORT_SYMBOL(drm_atomic_helper_async_check
);
1456 * drm_atomic_helper_async_commit - commit state asynchronously
1458 * @state: the driver state object
1460 * This function commits a state asynchronously, i.e., not vblank
1461 * synchronized. It should be used on a state only when
1462 * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
1463 * the states like normal sync commits, but just do in-place changes on the
1466 void drm_atomic_helper_async_commit(struct drm_device
*dev
,
1467 struct drm_atomic_state
*state
)
1469 struct drm_plane
*plane
;
1470 struct drm_plane_state
*plane_state
;
1471 const struct drm_plane_helper_funcs
*funcs
;
1474 for_each_new_plane_in_state(state
, plane
, plane_state
, i
) {
1475 funcs
= plane
->helper_private
;
1476 funcs
->atomic_async_update(plane
, plane_state
);
1479 EXPORT_SYMBOL(drm_atomic_helper_async_commit
);
1482 * drm_atomic_helper_commit - commit validated state object
1484 * @state: the driver state object
1485 * @nonblock: whether nonblocking behavior is requested.
1487 * This function commits a with drm_atomic_helper_check() pre-validated state
1488 * object. This can still fail when e.g. the framebuffer reservation fails. This
1489 * function implements nonblocking commits, using
1490 * drm_atomic_helper_setup_commit() and related functions.
1492 * Committing the actual hardware state is done through the
1493 * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or it's default
1494 * implementation drm_atomic_helper_commit_tail().
1497 * Zero for success or -errno.
1499 int drm_atomic_helper_commit(struct drm_device
*dev
,
1500 struct drm_atomic_state
*state
,
1505 if (state
->async_update
) {
1506 ret
= drm_atomic_helper_prepare_planes(dev
, state
);
1510 drm_atomic_helper_async_commit(dev
, state
);
1511 drm_atomic_helper_cleanup_planes(dev
, state
);
1516 ret
= drm_atomic_helper_setup_commit(state
, nonblock
);
1520 INIT_WORK(&state
->commit_work
, commit_work
);
1522 ret
= drm_atomic_helper_prepare_planes(dev
, state
);
1527 ret
= drm_atomic_helper_wait_for_fences(dev
, state
, true);
1533 * This is the point of no return - everything below never fails except
1534 * when the hw goes bonghits. Which means we can commit the new state on
1535 * the software side now.
1538 ret
= drm_atomic_helper_swap_state(state
, true);
1543 * Everything below can be run asynchronously without the need to grab
1544 * any modeset locks at all under one condition: It must be guaranteed
1545 * that the asynchronous work has either been cancelled (if the driver
1546 * supports it, which at least requires that the framebuffers get
1547 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
1548 * before the new state gets committed on the software side with
1549 * drm_atomic_helper_swap_state().
1551 * This scheme allows new atomic state updates to be prepared and
1552 * checked in parallel to the asynchronous completion of the previous
1553 * update. Which is important since compositors need to figure out the
1554 * composition of the next frame right after having submitted the
1557 * NOTE: Commit work has multiple phases, first hardware commit, then
1558 * cleanup. We want them to overlap, hence need system_unbound_wq to
1559 * make sure work items don't artifically stall on each another.
1562 drm_atomic_state_get(state
);
1564 queue_work(system_unbound_wq
, &state
->commit_work
);
1571 drm_atomic_helper_cleanup_planes(dev
, state
);
1574 EXPORT_SYMBOL(drm_atomic_helper_commit
);
1577 * DOC: implementing nonblocking commit
1579 * Nonblocking atomic commits have to be implemented in the following sequence:
1581 * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
1582 * which commit needs to call which can fail, so we want to run it first and
1585 * 2. Synchronize with any outstanding nonblocking commit worker threads which
1586 * might be affected the new state update. This can be done by either cancelling
1587 * or flushing the work items, depending upon whether the driver can deal with
1588 * cancelled updates. Note that it is important to ensure that the framebuffer
1589 * cleanup is still done when cancelling.
1591 * Asynchronous workers need to have sufficient parallelism to be able to run
1592 * different atomic commits on different CRTCs in parallel. The simplest way to
1593 * achive this is by running them on the &system_unbound_wq work queue. Note
1594 * that drivers are not required to split up atomic commits and run an
1595 * individual commit in parallel - userspace is supposed to do that if it cares.
1596 * But it might be beneficial to do that for modesets, since those necessarily
1597 * must be done as one global operation, and enabling or disabling a CRTC can
1598 * take a long time. But even that is not required.
1600 * 3. The software state is updated synchronously with
1601 * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
1602 * locks means concurrent callers never see inconsistent state. And doing this
1603 * while it's guaranteed that no relevant nonblocking worker runs means that
1604 * nonblocking workers do not need grab any locks. Actually they must not grab
1605 * locks, for otherwise the work flushing will deadlock.
1607 * 4. Schedule a work item to do all subsequent steps, using the split-out
1608 * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
1609 * then cleaning up the framebuffers after the old framebuffer is no longer
1612 * The above scheme is implemented in the atomic helper libraries in
1613 * drm_atomic_helper_commit() using a bunch of helper functions. See
1614 * drm_atomic_helper_setup_commit() for a starting point.
1617 static int stall_checks(struct drm_crtc
*crtc
, bool nonblock
)
1619 struct drm_crtc_commit
*commit
, *stall_commit
= NULL
;
1620 bool completed
= true;
1624 spin_lock(&crtc
->commit_lock
);
1626 list_for_each_entry(commit
, &crtc
->commit_list
, commit_entry
) {
1628 completed
= try_wait_for_completion(&commit
->flip_done
);
1629 /* Userspace is not allowed to get ahead of the previous
1630 * commit with nonblocking ones. */
1631 if (!completed
&& nonblock
) {
1632 spin_unlock(&crtc
->commit_lock
);
1635 } else if (i
== 1) {
1636 stall_commit
= commit
;
1637 drm_crtc_commit_get(stall_commit
);
1643 spin_unlock(&crtc
->commit_lock
);
1648 /* We don't want to let commits get ahead of cleanup work too much,
1649 * stalling on 2nd previous commit means triple-buffer won't ever stall.
1651 ret
= wait_for_completion_interruptible_timeout(&stall_commit
->cleanup_done
,
1654 DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n",
1655 crtc
->base
.id
, crtc
->name
);
1657 drm_crtc_commit_put(stall_commit
);
1659 return ret
< 0 ? ret
: 0;
1662 static void release_crtc_commit(struct completion
*completion
)
1664 struct drm_crtc_commit
*commit
= container_of(completion
,
1668 drm_crtc_commit_put(commit
);
1672 * drm_atomic_helper_setup_commit - setup possibly nonblocking commit
1673 * @state: new modeset state to be committed
1674 * @nonblock: whether nonblocking behavior is requested.
1676 * This function prepares @state to be used by the atomic helper's support for
1677 * nonblocking commits. Drivers using the nonblocking commit infrastructure
1678 * should always call this function from their
1679 * &drm_mode_config_funcs.atomic_commit hook.
1681 * To be able to use this support drivers need to use a few more helper
1682 * functions. drm_atomic_helper_wait_for_dependencies() must be called before
1683 * actually committing the hardware state, and for nonblocking commits this call
1684 * must be placed in the async worker. See also drm_atomic_helper_swap_state()
1685 * and it's stall parameter, for when a driver's commit hooks look at the
1686 * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly.
1688 * Completion of the hardware commit step must be signalled using
1689 * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed
1690 * to read or change any permanent software or hardware modeset state. The only
1691 * exception is state protected by other means than &drm_modeset_lock locks.
1692 * Only the free standing @state with pointers to the old state structures can
1693 * be inspected, e.g. to clean up old buffers using
1694 * drm_atomic_helper_cleanup_planes().
1696 * At the very end, before cleaning up @state drivers must call
1697 * drm_atomic_helper_commit_cleanup_done().
1699 * This is all implemented by in drm_atomic_helper_commit(), giving drivers a
1700 * complete and esay-to-use default implementation of the atomic_commit() hook.
1702 * The tracking of asynchronously executed and still pending commits is done
1703 * using the core structure &drm_crtc_commit.
1705 * By default there's no need to clean up resources allocated by this function
1706 * explicitly: drm_atomic_state_default_clear() will take care of that
1711 * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast,
1712 * -ENOMEM on allocation failures and -EINTR when a signal is pending.
1714 int drm_atomic_helper_setup_commit(struct drm_atomic_state
*state
,
1717 struct drm_crtc
*crtc
;
1718 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
1719 struct drm_crtc_commit
*commit
;
1722 for_each_oldnew_crtc_in_state(state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
1723 commit
= kzalloc(sizeof(*commit
), GFP_KERNEL
);
1727 init_completion(&commit
->flip_done
);
1728 init_completion(&commit
->hw_done
);
1729 init_completion(&commit
->cleanup_done
);
1730 INIT_LIST_HEAD(&commit
->commit_entry
);
1731 kref_init(&commit
->ref
);
1732 commit
->crtc
= crtc
;
1734 state
->crtcs
[i
].commit
= commit
;
1736 ret
= stall_checks(crtc
, nonblock
);
1740 /* Drivers only send out events when at least either current or
1741 * new CRTC state is active. Complete right away if everything
1743 if (!old_crtc_state
->active
&& !new_crtc_state
->active
) {
1744 complete_all(&commit
->flip_done
);
1748 /* Legacy cursor updates are fully unsynced. */
1749 if (state
->legacy_cursor_update
) {
1750 complete_all(&commit
->flip_done
);
1754 if (!new_crtc_state
->event
) {
1755 commit
->event
= kzalloc(sizeof(*commit
->event
),
1760 new_crtc_state
->event
= commit
->event
;
1763 new_crtc_state
->event
->base
.completion
= &commit
->flip_done
;
1764 new_crtc_state
->event
->base
.completion_release
= release_crtc_commit
;
1765 drm_crtc_commit_get(commit
);
1770 EXPORT_SYMBOL(drm_atomic_helper_setup_commit
);
1773 static struct drm_crtc_commit
*preceeding_commit(struct drm_crtc
*crtc
)
1775 struct drm_crtc_commit
*commit
;
1778 list_for_each_entry(commit
, &crtc
->commit_list
, commit_entry
) {
1779 /* skip the first entry, that's the current commit */
1789 * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits
1790 * @old_state: atomic state object with old state structures
1792 * This function waits for all preceeding commits that touch the same CRTC as
1793 * @old_state to both be committed to the hardware (as signalled by
1794 * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled
1795 * by calling drm_crtc_vblank_send_event() on the &drm_crtc_state.event).
1797 * This is part of the atomic helper support for nonblocking commits, see
1798 * drm_atomic_helper_setup_commit() for an overview.
1800 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state
*old_state
)
1802 struct drm_crtc
*crtc
;
1803 struct drm_crtc_state
*new_crtc_state
;
1804 struct drm_crtc_commit
*commit
;
1808 for_each_new_crtc_in_state(old_state
, crtc
, new_crtc_state
, i
) {
1809 spin_lock(&crtc
->commit_lock
);
1810 commit
= preceeding_commit(crtc
);
1812 drm_crtc_commit_get(commit
);
1813 spin_unlock(&crtc
->commit_lock
);
1818 ret
= wait_for_completion_timeout(&commit
->hw_done
,
1821 DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
1822 crtc
->base
.id
, crtc
->name
);
1824 /* Currently no support for overwriting flips, hence
1825 * stall for previous one to execute completely. */
1826 ret
= wait_for_completion_timeout(&commit
->flip_done
,
1829 DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1830 crtc
->base
.id
, crtc
->name
);
1832 drm_crtc_commit_put(commit
);
1835 EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies
);
1838 * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit
1839 * @old_state: atomic state object with old state structures
1841 * This function is used to signal completion of the hardware commit step. After
1842 * this step the driver is not allowed to read or change any permanent software
1843 * or hardware modeset state. The only exception is state protected by other
1844 * means than &drm_modeset_lock locks.
1846 * Drivers should try to postpone any expensive or delayed cleanup work after
1847 * this function is called.
1849 * This is part of the atomic helper support for nonblocking commits, see
1850 * drm_atomic_helper_setup_commit() for an overview.
1852 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state
*old_state
)
1854 struct drm_crtc
*crtc
;
1855 struct drm_crtc_state
*new_crtc_state
;
1856 struct drm_crtc_commit
*commit
;
1859 for_each_new_crtc_in_state(old_state
, crtc
, new_crtc_state
, i
) {
1860 commit
= old_state
->crtcs
[i
].commit
;
1864 /* backend must have consumed any event by now */
1865 WARN_ON(new_crtc_state
->event
);
1866 complete_all(&commit
->hw_done
);
1869 EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done
);
1872 * drm_atomic_helper_commit_cleanup_done - signal completion of commit
1873 * @old_state: atomic state object with old state structures
1875 * This signals completion of the atomic update @old_state, including any
1876 * cleanup work. If used, it must be called right before calling
1877 * drm_atomic_state_put().
1879 * This is part of the atomic helper support for nonblocking commits, see
1880 * drm_atomic_helper_setup_commit() for an overview.
1882 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state
*old_state
)
1884 struct drm_crtc
*crtc
;
1885 struct drm_crtc_state
*new_crtc_state
;
1886 struct drm_crtc_commit
*commit
;
1890 for_each_new_crtc_in_state(old_state
, crtc
, new_crtc_state
, i
) {
1891 commit
= old_state
->crtcs
[i
].commit
;
1892 if (WARN_ON(!commit
))
1895 complete_all(&commit
->cleanup_done
);
1896 WARN_ON(!try_wait_for_completion(&commit
->hw_done
));
1898 /* commit_list borrows our reference, need to remove before we
1899 * clean up our drm_atomic_state. But only after it actually
1900 * completed, otherwise subsequent commits won't stall properly. */
1901 if (try_wait_for_completion(&commit
->flip_done
))
1904 /* We must wait for the vblank event to signal our completion
1905 * before releasing our reference, since the vblank work does
1906 * not hold a reference of its own. */
1907 ret
= wait_for_completion_timeout(&commit
->flip_done
,
1910 DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1911 crtc
->base
.id
, crtc
->name
);
1914 spin_lock(&crtc
->commit_lock
);
1915 list_del(&commit
->commit_entry
);
1916 spin_unlock(&crtc
->commit_lock
);
1919 EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done
);
1922 * drm_atomic_helper_prepare_planes - prepare plane resources before commit
1924 * @state: atomic state object with new state structures
1926 * This function prepares plane state, specifically framebuffers, for the new
1927 * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure
1928 * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on
1929 * any already successfully prepared framebuffer.
1932 * 0 on success, negative error code on failure.
1934 int drm_atomic_helper_prepare_planes(struct drm_device
*dev
,
1935 struct drm_atomic_state
*state
)
1937 struct drm_plane
*plane
;
1938 struct drm_plane_state
*new_plane_state
;
1941 for_each_new_plane_in_state(state
, plane
, new_plane_state
, i
) {
1942 const struct drm_plane_helper_funcs
*funcs
;
1944 funcs
= plane
->helper_private
;
1946 if (funcs
->prepare_fb
) {
1947 ret
= funcs
->prepare_fb(plane
, new_plane_state
);
1956 for_each_new_plane_in_state(state
, plane
, new_plane_state
, j
) {
1957 const struct drm_plane_helper_funcs
*funcs
;
1962 funcs
= plane
->helper_private
;
1964 if (funcs
->cleanup_fb
)
1965 funcs
->cleanup_fb(plane
, new_plane_state
);
1970 EXPORT_SYMBOL(drm_atomic_helper_prepare_planes
);
1972 static bool plane_crtc_active(const struct drm_plane_state
*state
)
1974 return state
->crtc
&& state
->crtc
->state
->active
;
1978 * drm_atomic_helper_commit_planes - commit plane state
1980 * @old_state: atomic state object with old state structures
1981 * @flags: flags for committing plane state
1983 * This function commits the new plane state using the plane and atomic helper
1984 * functions for planes and crtcs. It assumes that the atomic state has already
1985 * been pushed into the relevant object state pointers, since this step can no
1988 * It still requires the global state object @old_state to know which planes and
1989 * crtcs need to be updated though.
1991 * Note that this function does all plane updates across all CRTCs in one step.
1992 * If the hardware can't support this approach look at
1993 * drm_atomic_helper_commit_planes_on_crtc() instead.
1995 * Plane parameters can be updated by applications while the associated CRTC is
1996 * disabled. The DRM/KMS core will store the parameters in the plane state,
1997 * which will be available to the driver when the CRTC is turned on. As a result
1998 * most drivers don't need to be immediately notified of plane updates for a
2001 * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in
2002 * @flags in order not to receive plane update notifications related to a
2003 * disabled CRTC. This avoids the need to manually ignore plane updates in
2004 * driver code when the driver and/or hardware can't or just don't need to deal
2005 * with updates on disabled CRTCs, for example when supporting runtime PM.
2007 * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant
2008 * display controllers require to disable a CRTC's planes when the CRTC is
2009 * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable
2010 * call for a plane if the CRTC of the old plane state needs a modesetting
2011 * operation. Of course, the drivers need to disable the planes in their CRTC
2012 * disable callbacks since no one else would do that.
2014 * The drm_atomic_helper_commit() default implementation doesn't set the
2015 * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers.
2016 * This should not be copied blindly by drivers.
2018 void drm_atomic_helper_commit_planes(struct drm_device
*dev
,
2019 struct drm_atomic_state
*old_state
,
2022 struct drm_crtc
*crtc
;
2023 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
2024 struct drm_plane
*plane
;
2025 struct drm_plane_state
*old_plane_state
, *new_plane_state
;
2027 bool active_only
= flags
& DRM_PLANE_COMMIT_ACTIVE_ONLY
;
2028 bool no_disable
= flags
& DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET
;
2030 for_each_oldnew_crtc_in_state(old_state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
2031 const struct drm_crtc_helper_funcs
*funcs
;
2033 funcs
= crtc
->helper_private
;
2035 if (!funcs
|| !funcs
->atomic_begin
)
2038 if (active_only
&& !new_crtc_state
->active
)
2041 funcs
->atomic_begin(crtc
, old_crtc_state
);
2044 for_each_oldnew_plane_in_state(old_state
, plane
, old_plane_state
, new_plane_state
, i
) {
2045 const struct drm_plane_helper_funcs
*funcs
;
2048 funcs
= plane
->helper_private
;
2053 disabling
= drm_atomic_plane_disabling(old_plane_state
,
2058 * Skip planes related to inactive CRTCs. If the plane
2059 * is enabled use the state of the current CRTC. If the
2060 * plane is being disabled use the state of the old
2061 * CRTC to avoid skipping planes being disabled on an
2064 if (!disabling
&& !plane_crtc_active(new_plane_state
))
2066 if (disabling
&& !plane_crtc_active(old_plane_state
))
2071 * Special-case disabling the plane if drivers support it.
2073 if (disabling
&& funcs
->atomic_disable
) {
2074 struct drm_crtc_state
*crtc_state
;
2076 crtc_state
= old_plane_state
->crtc
->state
;
2078 if (drm_atomic_crtc_needs_modeset(crtc_state
) &&
2082 funcs
->atomic_disable(plane
, old_plane_state
);
2083 } else if (new_plane_state
->crtc
|| disabling
) {
2084 funcs
->atomic_update(plane
, old_plane_state
);
2088 for_each_oldnew_crtc_in_state(old_state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
2089 const struct drm_crtc_helper_funcs
*funcs
;
2091 funcs
= crtc
->helper_private
;
2093 if (!funcs
|| !funcs
->atomic_flush
)
2096 if (active_only
&& !new_crtc_state
->active
)
2099 funcs
->atomic_flush(crtc
, old_crtc_state
);
2102 EXPORT_SYMBOL(drm_atomic_helper_commit_planes
);
2105 * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc
2106 * @old_crtc_state: atomic state object with the old crtc state
2108 * This function commits the new plane state using the plane and atomic helper
2109 * functions for planes on the specific crtc. It assumes that the atomic state
2110 * has already been pushed into the relevant object state pointers, since this
2111 * step can no longer fail.
2113 * This function is useful when plane updates should be done crtc-by-crtc
2114 * instead of one global step like drm_atomic_helper_commit_planes() does.
2116 * This function can only be savely used when planes are not allowed to move
2117 * between different CRTCs because this function doesn't handle inter-CRTC
2118 * depencies. Callers need to ensure that either no such depencies exist,
2119 * resolve them through ordering of commit calls or through some other means.
2122 drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state
*old_crtc_state
)
2124 const struct drm_crtc_helper_funcs
*crtc_funcs
;
2125 struct drm_crtc
*crtc
= old_crtc_state
->crtc
;
2126 struct drm_atomic_state
*old_state
= old_crtc_state
->state
;
2127 struct drm_plane
*plane
;
2128 unsigned plane_mask
;
2130 plane_mask
= old_crtc_state
->plane_mask
;
2131 plane_mask
|= crtc
->state
->plane_mask
;
2133 crtc_funcs
= crtc
->helper_private
;
2134 if (crtc_funcs
&& crtc_funcs
->atomic_begin
)
2135 crtc_funcs
->atomic_begin(crtc
, old_crtc_state
);
2137 drm_for_each_plane_mask(plane
, crtc
->dev
, plane_mask
) {
2138 struct drm_plane_state
*old_plane_state
=
2139 drm_atomic_get_old_plane_state(old_state
, plane
);
2140 const struct drm_plane_helper_funcs
*plane_funcs
;
2142 plane_funcs
= plane
->helper_private
;
2144 if (!old_plane_state
|| !plane_funcs
)
2147 WARN_ON(plane
->state
->crtc
&& plane
->state
->crtc
!= crtc
);
2149 if (drm_atomic_plane_disabling(old_plane_state
, plane
->state
) &&
2150 plane_funcs
->atomic_disable
)
2151 plane_funcs
->atomic_disable(plane
, old_plane_state
);
2152 else if (plane
->state
->crtc
||
2153 drm_atomic_plane_disabling(old_plane_state
, plane
->state
))
2154 plane_funcs
->atomic_update(plane
, old_plane_state
);
2157 if (crtc_funcs
&& crtc_funcs
->atomic_flush
)
2158 crtc_funcs
->atomic_flush(crtc
, old_crtc_state
);
2160 EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc
);
2163 * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
2164 * @old_crtc_state: atomic state object with the old CRTC state
2165 * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks
2167 * Disables all planes associated with the given CRTC. This can be
2168 * used for instance in the CRTC helper atomic_disable callback to disable
2171 * If the atomic-parameter is set the function calls the CRTC's
2172 * atomic_begin hook before and atomic_flush hook after disabling the
2175 * It is a bug to call this function without having implemented the
2176 * &drm_plane_helper_funcs.atomic_disable plane hook.
2179 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state
*old_crtc_state
,
2182 struct drm_crtc
*crtc
= old_crtc_state
->crtc
;
2183 const struct drm_crtc_helper_funcs
*crtc_funcs
=
2184 crtc
->helper_private
;
2185 struct drm_plane
*plane
;
2187 if (atomic
&& crtc_funcs
&& crtc_funcs
->atomic_begin
)
2188 crtc_funcs
->atomic_begin(crtc
, NULL
);
2190 drm_atomic_crtc_state_for_each_plane(plane
, old_crtc_state
) {
2191 const struct drm_plane_helper_funcs
*plane_funcs
=
2192 plane
->helper_private
;
2197 WARN_ON(!plane_funcs
->atomic_disable
);
2198 if (plane_funcs
->atomic_disable
)
2199 plane_funcs
->atomic_disable(plane
, NULL
);
2202 if (atomic
&& crtc_funcs
&& crtc_funcs
->atomic_flush
)
2203 crtc_funcs
->atomic_flush(crtc
, NULL
);
2205 EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc
);
2208 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
2210 * @old_state: atomic state object with old state structures
2212 * This function cleans up plane state, specifically framebuffers, from the old
2213 * configuration. Hence the old configuration must be perserved in @old_state to
2214 * be able to call this function.
2216 * This function must also be called on the new state when the atomic update
2217 * fails at any point after calling drm_atomic_helper_prepare_planes().
2219 void drm_atomic_helper_cleanup_planes(struct drm_device
*dev
,
2220 struct drm_atomic_state
*old_state
)
2222 struct drm_plane
*plane
;
2223 struct drm_plane_state
*old_plane_state
, *new_plane_state
;
2226 for_each_oldnew_plane_in_state(old_state
, plane
, old_plane_state
, new_plane_state
, i
) {
2227 const struct drm_plane_helper_funcs
*funcs
;
2228 struct drm_plane_state
*plane_state
;
2231 * This might be called before swapping when commit is aborted,
2232 * in which case we have to cleanup the new state.
2234 if (old_plane_state
== plane
->state
)
2235 plane_state
= new_plane_state
;
2237 plane_state
= old_plane_state
;
2239 funcs
= plane
->helper_private
;
2241 if (funcs
->cleanup_fb
)
2242 funcs
->cleanup_fb(plane
, plane_state
);
2245 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes
);
2248 * drm_atomic_helper_swap_state - store atomic state into current sw state
2249 * @state: atomic state
2250 * @stall: stall for preceeding commits
2252 * This function stores the atomic state into the current state pointers in all
2253 * driver objects. It should be called after all failing steps have been done
2254 * and succeeded, but before the actual hardware state is committed.
2256 * For cleanup and error recovery the current state for all changed objects will
2257 * be swapped into @state.
2259 * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
2261 * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
2263 * 2. Do any other steps that might fail.
2265 * 3. Put the staged state into the current state pointers with this function.
2267 * 4. Actually commit the hardware state.
2269 * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3
2270 * contains the old state. Also do any other cleanup required with that state.
2272 * @stall must be set when nonblocking commits for this driver directly access
2273 * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With
2274 * the current atomic helpers this is almost always the case, since the helpers
2275 * don't pass the right state structures to the callbacks.
2279 * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the
2280 * waiting for the previous commits has been interrupted.
2282 int drm_atomic_helper_swap_state(struct drm_atomic_state
*state
,
2286 struct drm_connector
*connector
;
2287 struct drm_connector_state
*old_conn_state
, *new_conn_state
;
2288 struct drm_crtc
*crtc
;
2289 struct drm_crtc_state
*old_crtc_state
, *new_crtc_state
;
2290 struct drm_plane
*plane
;
2291 struct drm_plane_state
*old_plane_state
, *new_plane_state
;
2292 struct drm_crtc_commit
*commit
;
2293 struct drm_private_obj
*obj
;
2294 struct drm_private_state
*old_obj_state
, *new_obj_state
;
2297 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
) {
2298 spin_lock(&crtc
->commit_lock
);
2299 commit
= list_first_entry_or_null(&crtc
->commit_list
,
2300 struct drm_crtc_commit
, commit_entry
);
2302 drm_crtc_commit_get(commit
);
2303 spin_unlock(&crtc
->commit_lock
);
2308 ret
= wait_for_completion_interruptible(&commit
->hw_done
);
2309 drm_crtc_commit_put(commit
);
2316 for_each_oldnew_connector_in_state(state
, connector
, old_conn_state
, new_conn_state
, i
) {
2317 WARN_ON(connector
->state
!= old_conn_state
);
2319 old_conn_state
->state
= state
;
2320 new_conn_state
->state
= NULL
;
2322 state
->connectors
[i
].state
= old_conn_state
;
2323 connector
->state
= new_conn_state
;
2326 for_each_oldnew_crtc_in_state(state
, crtc
, old_crtc_state
, new_crtc_state
, i
) {
2327 WARN_ON(crtc
->state
!= old_crtc_state
);
2329 old_crtc_state
->state
= state
;
2330 new_crtc_state
->state
= NULL
;
2332 state
->crtcs
[i
].state
= old_crtc_state
;
2333 crtc
->state
= new_crtc_state
;
2335 if (state
->crtcs
[i
].commit
) {
2336 spin_lock(&crtc
->commit_lock
);
2337 list_add(&state
->crtcs
[i
].commit
->commit_entry
,
2338 &crtc
->commit_list
);
2339 spin_unlock(&crtc
->commit_lock
);
2341 state
->crtcs
[i
].commit
->event
= NULL
;
2345 for_each_oldnew_plane_in_state(state
, plane
, old_plane_state
, new_plane_state
, i
) {
2346 WARN_ON(plane
->state
!= old_plane_state
);
2348 old_plane_state
->state
= state
;
2349 new_plane_state
->state
= NULL
;
2351 state
->planes
[i
].state
= old_plane_state
;
2352 plane
->state
= new_plane_state
;
2355 for_each_oldnew_private_obj_in_state(state
, obj
, old_obj_state
, new_obj_state
, i
) {
2356 WARN_ON(obj
->state
!= old_obj_state
);
2358 old_obj_state
->state
= state
;
2359 new_obj_state
->state
= NULL
;
2361 state
->private_objs
[i
].state
= old_obj_state
;
2362 obj
->state
= new_obj_state
;
2367 EXPORT_SYMBOL(drm_atomic_helper_swap_state
);
2370 * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
2371 * @plane: plane object to update
2372 * @crtc: owning CRTC of owning plane
2373 * @fb: framebuffer to flip onto plane
2374 * @crtc_x: x offset of primary plane on crtc
2375 * @crtc_y: y offset of primary plane on crtc
2376 * @crtc_w: width of primary plane rectangle on crtc
2377 * @crtc_h: height of primary plane rectangle on crtc
2378 * @src_x: x offset of @fb for panning
2379 * @src_y: y offset of @fb for panning
2380 * @src_w: width of source rectangle in @fb
2381 * @src_h: height of source rectangle in @fb
2382 * @ctx: lock acquire context
2384 * Provides a default plane update handler using the atomic driver interface.
2387 * Zero on success, error code on failure
2389 int drm_atomic_helper_update_plane(struct drm_plane
*plane
,
2390 struct drm_crtc
*crtc
,
2391 struct drm_framebuffer
*fb
,
2392 int crtc_x
, int crtc_y
,
2393 unsigned int crtc_w
, unsigned int crtc_h
,
2394 uint32_t src_x
, uint32_t src_y
,
2395 uint32_t src_w
, uint32_t src_h
,
2396 struct drm_modeset_acquire_ctx
*ctx
)
2398 struct drm_atomic_state
*state
;
2399 struct drm_plane_state
*plane_state
;
2402 state
= drm_atomic_state_alloc(plane
->dev
);
2406 state
->acquire_ctx
= ctx
;
2407 plane_state
= drm_atomic_get_plane_state(state
, plane
);
2408 if (IS_ERR(plane_state
)) {
2409 ret
= PTR_ERR(plane_state
);
2413 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
2416 drm_atomic_set_fb_for_plane(plane_state
, fb
);
2417 plane_state
->crtc_x
= crtc_x
;
2418 plane_state
->crtc_y
= crtc_y
;
2419 plane_state
->crtc_w
= crtc_w
;
2420 plane_state
->crtc_h
= crtc_h
;
2421 plane_state
->src_x
= src_x
;
2422 plane_state
->src_y
= src_y
;
2423 plane_state
->src_w
= src_w
;
2424 plane_state
->src_h
= src_h
;
2426 if (plane
== crtc
->cursor
)
2427 state
->legacy_cursor_update
= true;
2429 ret
= drm_atomic_commit(state
);
2431 drm_atomic_state_put(state
);
2434 EXPORT_SYMBOL(drm_atomic_helper_update_plane
);
2437 * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
2438 * @plane: plane to disable
2439 * @ctx: lock acquire context
2441 * Provides a default plane disable handler using the atomic driver interface.
2444 * Zero on success, error code on failure
2446 int drm_atomic_helper_disable_plane(struct drm_plane
*plane
,
2447 struct drm_modeset_acquire_ctx
*ctx
)
2449 struct drm_atomic_state
*state
;
2450 struct drm_plane_state
*plane_state
;
2453 state
= drm_atomic_state_alloc(plane
->dev
);
2457 state
->acquire_ctx
= ctx
;
2458 plane_state
= drm_atomic_get_plane_state(state
, plane
);
2459 if (IS_ERR(plane_state
)) {
2460 ret
= PTR_ERR(plane_state
);
2464 if (plane_state
->crtc
&& (plane
== plane
->crtc
->cursor
))
2465 plane_state
->state
->legacy_cursor_update
= true;
2467 ret
= __drm_atomic_helper_disable_plane(plane
, plane_state
);
2471 ret
= drm_atomic_commit(state
);
2473 drm_atomic_state_put(state
);
2476 EXPORT_SYMBOL(drm_atomic_helper_disable_plane
);
2478 /* just used from fb-helper and atomic-helper: */
2479 int __drm_atomic_helper_disable_plane(struct drm_plane
*plane
,
2480 struct drm_plane_state
*plane_state
)
2484 ret
= drm_atomic_set_crtc_for_plane(plane_state
, NULL
);
2488 drm_atomic_set_fb_for_plane(plane_state
, NULL
);
2489 plane_state
->crtc_x
= 0;
2490 plane_state
->crtc_y
= 0;
2491 plane_state
->crtc_w
= 0;
2492 plane_state
->crtc_h
= 0;
2493 plane_state
->src_x
= 0;
2494 plane_state
->src_y
= 0;
2495 plane_state
->src_w
= 0;
2496 plane_state
->src_h
= 0;
2501 static int update_output_state(struct drm_atomic_state
*state
,
2502 struct drm_mode_set
*set
)
2504 struct drm_device
*dev
= set
->crtc
->dev
;
2505 struct drm_crtc
*crtc
;
2506 struct drm_crtc_state
*new_crtc_state
;
2507 struct drm_connector
*connector
;
2508 struct drm_connector_state
*new_conn_state
;
2511 ret
= drm_modeset_lock(&dev
->mode_config
.connection_mutex
,
2512 state
->acquire_ctx
);
2516 /* First disable all connectors on the target crtc. */
2517 ret
= drm_atomic_add_affected_connectors(state
, set
->crtc
);
2521 for_each_new_connector_in_state(state
, connector
, new_conn_state
, i
) {
2522 if (new_conn_state
->crtc
== set
->crtc
) {
2523 ret
= drm_atomic_set_crtc_for_connector(new_conn_state
,
2528 /* Make sure legacy setCrtc always re-trains */
2529 new_conn_state
->link_status
= DRM_LINK_STATUS_GOOD
;
2533 /* Then set all connectors from set->connectors on the target crtc */
2534 for (i
= 0; i
< set
->num_connectors
; i
++) {
2535 new_conn_state
= drm_atomic_get_connector_state(state
,
2536 set
->connectors
[i
]);
2537 if (IS_ERR(new_conn_state
))
2538 return PTR_ERR(new_conn_state
);
2540 ret
= drm_atomic_set_crtc_for_connector(new_conn_state
,
2546 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
) {
2547 /* Don't update ->enable for the CRTC in the set_config request,
2548 * since a mismatch would indicate a bug in the upper layers.
2549 * The actual modeset code later on will catch any
2550 * inconsistencies here. */
2551 if (crtc
== set
->crtc
)
2554 if (!new_crtc_state
->connector_mask
) {
2555 ret
= drm_atomic_set_mode_prop_for_crtc(new_crtc_state
,
2560 new_crtc_state
->active
= false;
2568 * drm_atomic_helper_set_config - set a new config from userspace
2569 * @set: mode set configuration
2570 * @ctx: lock acquisition context
2572 * Provides a default crtc set_config handler using the atomic driver interface.
2574 * NOTE: For backwards compatibility with old userspace this automatically
2575 * resets the "link-status" property to GOOD, to force any link
2576 * re-training. The SETCRTC ioctl does not define whether an update does
2577 * need a full modeset or just a plane update, hence we're allowed to do
2578 * that. See also drm_mode_connector_set_link_status_property().
2581 * Returns 0 on success, negative errno numbers on failure.
2583 int drm_atomic_helper_set_config(struct drm_mode_set
*set
,
2584 struct drm_modeset_acquire_ctx
*ctx
)
2586 struct drm_atomic_state
*state
;
2587 struct drm_crtc
*crtc
= set
->crtc
;
2590 state
= drm_atomic_state_alloc(crtc
->dev
);
2594 state
->acquire_ctx
= ctx
;
2595 ret
= __drm_atomic_helper_set_config(set
, state
);
2599 ret
= handle_conflicting_encoders(state
, true);
2603 ret
= drm_atomic_commit(state
);
2606 drm_atomic_state_put(state
);
2609 EXPORT_SYMBOL(drm_atomic_helper_set_config
);
2611 /* just used from fb-helper and atomic-helper: */
2612 int __drm_atomic_helper_set_config(struct drm_mode_set
*set
,
2613 struct drm_atomic_state
*state
)
2615 struct drm_crtc_state
*crtc_state
;
2616 struct drm_plane_state
*primary_state
;
2617 struct drm_crtc
*crtc
= set
->crtc
;
2618 int hdisplay
, vdisplay
;
2621 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2622 if (IS_ERR(crtc_state
))
2623 return PTR_ERR(crtc_state
);
2625 primary_state
= drm_atomic_get_plane_state(state
, crtc
->primary
);
2626 if (IS_ERR(primary_state
))
2627 return PTR_ERR(primary_state
);
2631 WARN_ON(set
->num_connectors
);
2633 ret
= drm_atomic_set_mode_for_crtc(crtc_state
, NULL
);
2637 crtc_state
->active
= false;
2639 ret
= drm_atomic_set_crtc_for_plane(primary_state
, NULL
);
2643 drm_atomic_set_fb_for_plane(primary_state
, NULL
);
2649 WARN_ON(!set
->num_connectors
);
2651 ret
= drm_atomic_set_mode_for_crtc(crtc_state
, set
->mode
);
2655 crtc_state
->active
= true;
2657 ret
= drm_atomic_set_crtc_for_plane(primary_state
, crtc
);
2661 drm_mode_get_hv_timing(set
->mode
, &hdisplay
, &vdisplay
);
2663 drm_atomic_set_fb_for_plane(primary_state
, set
->fb
);
2664 primary_state
->crtc_x
= 0;
2665 primary_state
->crtc_y
= 0;
2666 primary_state
->crtc_w
= hdisplay
;
2667 primary_state
->crtc_h
= vdisplay
;
2668 primary_state
->src_x
= set
->x
<< 16;
2669 primary_state
->src_y
= set
->y
<< 16;
2670 if (drm_rotation_90_or_270(primary_state
->rotation
)) {
2671 primary_state
->src_w
= vdisplay
<< 16;
2672 primary_state
->src_h
= hdisplay
<< 16;
2674 primary_state
->src_w
= hdisplay
<< 16;
2675 primary_state
->src_h
= vdisplay
<< 16;
2679 ret
= update_output_state(state
, set
);
2687 * drm_atomic_helper_disable_all - disable all currently active outputs
2689 * @ctx: lock acquisition context
2691 * Loops through all connectors, finding those that aren't turned off and then
2692 * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
2693 * that they are connected to.
2695 * This is used for example in suspend/resume to disable all currently active
2696 * functions when suspending. If you just want to shut down everything at e.g.
2697 * driver unload, look at drm_atomic_helper_shutdown().
2699 * Note that if callers haven't already acquired all modeset locks this might
2700 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
2703 * 0 on success or a negative error code on failure.
2706 * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and
2707 * drm_atomic_helper_shutdown().
2709 int drm_atomic_helper_disable_all(struct drm_device
*dev
,
2710 struct drm_modeset_acquire_ctx
*ctx
)
2712 struct drm_atomic_state
*state
;
2713 struct drm_connector_state
*conn_state
;
2714 struct drm_connector
*conn
;
2715 struct drm_plane_state
*plane_state
;
2716 struct drm_plane
*plane
;
2717 struct drm_crtc_state
*crtc_state
;
2718 struct drm_crtc
*crtc
;
2721 state
= drm_atomic_state_alloc(dev
);
2725 state
->acquire_ctx
= ctx
;
2727 drm_for_each_crtc(crtc
, dev
) {
2728 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2729 if (IS_ERR(crtc_state
)) {
2730 ret
= PTR_ERR(crtc_state
);
2734 crtc_state
->active
= false;
2736 ret
= drm_atomic_set_mode_prop_for_crtc(crtc_state
, NULL
);
2740 ret
= drm_atomic_add_affected_planes(state
, crtc
);
2744 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
2749 for_each_new_connector_in_state(state
, conn
, conn_state
, i
) {
2750 ret
= drm_atomic_set_crtc_for_connector(conn_state
, NULL
);
2755 for_each_new_plane_in_state(state
, plane
, plane_state
, i
) {
2756 ret
= drm_atomic_set_crtc_for_plane(plane_state
, NULL
);
2760 drm_atomic_set_fb_for_plane(plane_state
, NULL
);
2763 ret
= drm_atomic_commit(state
);
2765 drm_atomic_state_put(state
);
2769 EXPORT_SYMBOL(drm_atomic_helper_disable_all
);
2772 * drm_atomic_helper_shutdown - shutdown all CRTC
2775 * This shuts down all CRTC, which is useful for driver unloading. Shutdown on
2776 * suspend should instead be handled with drm_atomic_helper_suspend(), since
2777 * that also takes a snapshot of the modeset state to be restored on resume.
2779 * This is just a convenience wrapper around drm_atomic_helper_disable_all(),
2780 * and it is the atomic version of drm_crtc_force_disable_all().
2782 void drm_atomic_helper_shutdown(struct drm_device
*dev
)
2784 struct drm_modeset_acquire_ctx ctx
;
2787 drm_modeset_acquire_init(&ctx
, 0);
2789 ret
= drm_modeset_lock_all_ctx(dev
, &ctx
);
2791 ret
= drm_atomic_helper_disable_all(dev
, &ctx
);
2793 if (ret
!= -EDEADLK
)
2796 drm_modeset_backoff(&ctx
);
2800 DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret
);
2802 drm_modeset_drop_locks(&ctx
);
2803 drm_modeset_acquire_fini(&ctx
);
2805 EXPORT_SYMBOL(drm_atomic_helper_shutdown
);
2808 * drm_atomic_helper_suspend - subsystem-level suspend helper
2811 * Duplicates the current atomic state, disables all active outputs and then
2812 * returns a pointer to the original atomic state to the caller. Drivers can
2813 * pass this pointer to the drm_atomic_helper_resume() helper upon resume to
2814 * restore the output configuration that was active at the time the system
2817 * Note that it is potentially unsafe to use this. The atomic state object
2818 * returned by this function is assumed to be persistent. Drivers must ensure
2819 * that this holds true. Before calling this function, drivers must make sure
2820 * to suspend fbdev emulation so that nothing can be using the device.
2823 * A pointer to a copy of the state before suspend on success or an ERR_PTR()-
2824 * encoded error code on failure. Drivers should store the returned atomic
2825 * state object and pass it to the drm_atomic_helper_resume() helper upon
2829 * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(),
2830 * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state()
2832 struct drm_atomic_state
*drm_atomic_helper_suspend(struct drm_device
*dev
)
2834 struct drm_modeset_acquire_ctx ctx
;
2835 struct drm_atomic_state
*state
;
2838 drm_modeset_acquire_init(&ctx
, 0);
2841 err
= drm_modeset_lock_all_ctx(dev
, &ctx
);
2843 state
= ERR_PTR(err
);
2847 state
= drm_atomic_helper_duplicate_state(dev
, &ctx
);
2851 err
= drm_atomic_helper_disable_all(dev
, &ctx
);
2853 drm_atomic_state_put(state
);
2854 state
= ERR_PTR(err
);
2859 if (PTR_ERR(state
) == -EDEADLK
) {
2860 drm_modeset_backoff(&ctx
);
2864 drm_modeset_drop_locks(&ctx
);
2865 drm_modeset_acquire_fini(&ctx
);
2868 EXPORT_SYMBOL(drm_atomic_helper_suspend
);
2871 * drm_atomic_helper_commit_duplicated_state - commit duplicated state
2872 * @state: duplicated atomic state to commit
2873 * @ctx: pointer to acquire_ctx to use for commit.
2875 * The state returned by drm_atomic_helper_duplicate_state() and
2876 * drm_atomic_helper_suspend() is partially invalid, and needs to
2877 * be fixed up before commit.
2880 * 0 on success or a negative error code on failure.
2883 * drm_atomic_helper_suspend()
2885 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state
*state
,
2886 struct drm_modeset_acquire_ctx
*ctx
)
2889 struct drm_plane
*plane
;
2890 struct drm_plane_state
*new_plane_state
;
2891 struct drm_connector
*connector
;
2892 struct drm_connector_state
*new_conn_state
;
2893 struct drm_crtc
*crtc
;
2894 struct drm_crtc_state
*new_crtc_state
;
2896 state
->acquire_ctx
= ctx
;
2898 for_each_new_plane_in_state(state
, plane
, new_plane_state
, i
)
2899 state
->planes
[i
].old_state
= plane
->state
;
2901 for_each_new_crtc_in_state(state
, crtc
, new_crtc_state
, i
)
2902 state
->crtcs
[i
].old_state
= crtc
->state
;
2904 for_each_new_connector_in_state(state
, connector
, new_conn_state
, i
)
2905 state
->connectors
[i
].old_state
= connector
->state
;
2907 return drm_atomic_commit(state
);
2909 EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state
);
2912 * drm_atomic_helper_resume - subsystem-level resume helper
2914 * @state: atomic state to resume to
2916 * Calls drm_mode_config_reset() to synchronize hardware and software states,
2917 * grabs all modeset locks and commits the atomic state object. This can be
2918 * used in conjunction with the drm_atomic_helper_suspend() helper to
2919 * implement suspend/resume for drivers that support atomic mode-setting.
2922 * 0 on success or a negative error code on failure.
2925 * drm_atomic_helper_suspend()
2927 int drm_atomic_helper_resume(struct drm_device
*dev
,
2928 struct drm_atomic_state
*state
)
2930 struct drm_modeset_acquire_ctx ctx
;
2933 drm_mode_config_reset(dev
);
2935 drm_modeset_acquire_init(&ctx
, 0);
2937 err
= drm_modeset_lock_all_ctx(dev
, &ctx
);
2941 err
= drm_atomic_helper_commit_duplicated_state(state
, &ctx
);
2943 if (err
!= -EDEADLK
)
2946 drm_modeset_backoff(&ctx
);
2949 drm_modeset_drop_locks(&ctx
);
2950 drm_modeset_acquire_fini(&ctx
);
2954 EXPORT_SYMBOL(drm_atomic_helper_resume
);
2957 * drm_atomic_helper_crtc_set_property - helper for crtc properties
2959 * @property: DRM property
2960 * @val: value of property
2962 * Provides a default crtc set_property handler using the atomic driver
2966 * Zero on success, error code on failure
2969 drm_atomic_helper_crtc_set_property(struct drm_crtc
*crtc
,
2970 struct drm_property
*property
,
2973 struct drm_atomic_state
*state
;
2974 struct drm_crtc_state
*crtc_state
;
2977 state
= drm_atomic_state_alloc(crtc
->dev
);
2981 /* ->set_property is always called with all locks held. */
2982 state
->acquire_ctx
= crtc
->dev
->mode_config
.acquire_ctx
;
2984 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2985 if (IS_ERR(crtc_state
)) {
2986 ret
= PTR_ERR(crtc_state
);
2990 ret
= drm_atomic_crtc_set_property(crtc
, crtc_state
,
2995 ret
= drm_atomic_commit(state
);
2997 if (ret
== -EDEADLK
)
3000 drm_atomic_state_put(state
);
3004 drm_atomic_state_clear(state
);
3005 drm_atomic_legacy_backoff(state
);
3009 EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property
);
3012 * drm_atomic_helper_plane_set_property - helper for plane properties
3014 * @property: DRM property
3015 * @val: value of property
3017 * Provides a default plane set_property handler using the atomic driver
3021 * Zero on success, error code on failure
3024 drm_atomic_helper_plane_set_property(struct drm_plane
*plane
,
3025 struct drm_property
*property
,
3028 struct drm_atomic_state
*state
;
3029 struct drm_plane_state
*plane_state
;
3032 state
= drm_atomic_state_alloc(plane
->dev
);
3036 /* ->set_property is always called with all locks held. */
3037 state
->acquire_ctx
= plane
->dev
->mode_config
.acquire_ctx
;
3039 plane_state
= drm_atomic_get_plane_state(state
, plane
);
3040 if (IS_ERR(plane_state
)) {
3041 ret
= PTR_ERR(plane_state
);
3045 ret
= drm_atomic_plane_set_property(plane
, plane_state
,
3050 ret
= drm_atomic_commit(state
);
3052 if (ret
== -EDEADLK
)
3055 drm_atomic_state_put(state
);
3059 drm_atomic_state_clear(state
);
3060 drm_atomic_legacy_backoff(state
);
3064 EXPORT_SYMBOL(drm_atomic_helper_plane_set_property
);
3067 * drm_atomic_helper_connector_set_property - helper for connector properties
3068 * @connector: DRM connector
3069 * @property: DRM property
3070 * @val: value of property
3072 * Provides a default connector set_property handler using the atomic driver
3076 * Zero on success, error code on failure
3079 drm_atomic_helper_connector_set_property(struct drm_connector
*connector
,
3080 struct drm_property
*property
,
3083 struct drm_atomic_state
*state
;
3084 struct drm_connector_state
*connector_state
;
3087 state
= drm_atomic_state_alloc(connector
->dev
);
3091 /* ->set_property is always called with all locks held. */
3092 state
->acquire_ctx
= connector
->dev
->mode_config
.acquire_ctx
;
3094 connector_state
= drm_atomic_get_connector_state(state
, connector
);
3095 if (IS_ERR(connector_state
)) {
3096 ret
= PTR_ERR(connector_state
);
3100 ret
= drm_atomic_connector_set_property(connector
, connector_state
,
3105 ret
= drm_atomic_commit(state
);
3107 if (ret
== -EDEADLK
)
3110 drm_atomic_state_put(state
);
3114 drm_atomic_state_clear(state
);
3115 drm_atomic_legacy_backoff(state
);
3119 EXPORT_SYMBOL(drm_atomic_helper_connector_set_property
);
3121 static int page_flip_common(struct drm_atomic_state
*state
,
3122 struct drm_crtc
*crtc
,
3123 struct drm_framebuffer
*fb
,
3124 struct drm_pending_vblank_event
*event
,
3127 struct drm_plane
*plane
= crtc
->primary
;
3128 struct drm_plane_state
*plane_state
;
3129 struct drm_crtc_state
*crtc_state
;
3132 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
3133 if (IS_ERR(crtc_state
))
3134 return PTR_ERR(crtc_state
);
3136 crtc_state
->event
= event
;
3137 crtc_state
->pageflip_flags
= flags
;
3139 plane_state
= drm_atomic_get_plane_state(state
, plane
);
3140 if (IS_ERR(plane_state
))
3141 return PTR_ERR(plane_state
);
3143 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
3146 drm_atomic_set_fb_for_plane(plane_state
, fb
);
3148 /* Make sure we don't accidentally do a full modeset. */
3149 state
->allow_modeset
= false;
3150 if (!crtc_state
->active
) {
3151 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n",
3152 crtc
->base
.id
, crtc
->name
);
3160 * drm_atomic_helper_page_flip - execute a legacy page flip
3162 * @fb: DRM framebuffer
3163 * @event: optional DRM event to signal upon completion
3164 * @flags: flip flags for non-vblank sync'ed updates
3165 * @ctx: lock acquisition context
3167 * Provides a default &drm_crtc_funcs.page_flip implementation
3168 * using the atomic driver interface.
3171 * Returns 0 on success, negative errno numbers on failure.
3174 * drm_atomic_helper_page_flip_target()
3176 int drm_atomic_helper_page_flip(struct drm_crtc
*crtc
,
3177 struct drm_framebuffer
*fb
,
3178 struct drm_pending_vblank_event
*event
,
3180 struct drm_modeset_acquire_ctx
*ctx
)
3182 struct drm_plane
*plane
= crtc
->primary
;
3183 struct drm_atomic_state
*state
;
3186 state
= drm_atomic_state_alloc(plane
->dev
);
3190 state
->acquire_ctx
= ctx
;
3192 ret
= page_flip_common(state
, crtc
, fb
, event
, flags
);
3196 ret
= drm_atomic_nonblocking_commit(state
);
3198 drm_atomic_state_put(state
);
3201 EXPORT_SYMBOL(drm_atomic_helper_page_flip
);
3204 * drm_atomic_helper_page_flip_target - do page flip on target vblank period.
3206 * @fb: DRM framebuffer
3207 * @event: optional DRM event to signal upon completion
3208 * @flags: flip flags for non-vblank sync'ed updates
3209 * @target: specifying the target vblank period when the flip to take effect
3210 * @ctx: lock acquisition context
3212 * Provides a default &drm_crtc_funcs.page_flip_target implementation.
3213 * Similar to drm_atomic_helper_page_flip() with extra parameter to specify
3214 * target vblank period to flip.
3217 * Returns 0 on success, negative errno numbers on failure.
3219 int drm_atomic_helper_page_flip_target(struct drm_crtc
*crtc
,
3220 struct drm_framebuffer
*fb
,
3221 struct drm_pending_vblank_event
*event
,
3224 struct drm_modeset_acquire_ctx
*ctx
)
3226 struct drm_plane
*plane
= crtc
->primary
;
3227 struct drm_atomic_state
*state
;
3228 struct drm_crtc_state
*crtc_state
;
3231 state
= drm_atomic_state_alloc(plane
->dev
);
3235 state
->acquire_ctx
= ctx
;
3237 ret
= page_flip_common(state
, crtc
, fb
, event
, flags
);
3241 crtc_state
= drm_atomic_get_new_crtc_state(state
, crtc
);
3242 if (WARN_ON(!crtc_state
)) {
3246 crtc_state
->target_vblank
= target
;
3248 ret
= drm_atomic_nonblocking_commit(state
);
3250 drm_atomic_state_put(state
);
3253 EXPORT_SYMBOL(drm_atomic_helper_page_flip_target
);
3256 * drm_atomic_helper_connector_dpms() - connector dpms helper implementation
3257 * @connector: affected connector
3260 * This is the main helper function provided by the atomic helper framework for
3261 * implementing the legacy DPMS connector interface. It computes the new desired
3262 * &drm_crtc_state.active state for the corresponding CRTC (if the connector is
3263 * enabled) and updates it.
3266 * Returns 0 on success, negative errno numbers on failure.
3268 int drm_atomic_helper_connector_dpms(struct drm_connector
*connector
,
3271 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
3272 struct drm_atomic_state
*state
;
3273 struct drm_crtc_state
*crtc_state
;
3274 struct drm_crtc
*crtc
;
3275 struct drm_connector
*tmp_connector
;
3276 struct drm_connector_list_iter conn_iter
;
3278 bool active
= false;
3279 int old_mode
= connector
->dpms
;
3281 if (mode
!= DRM_MODE_DPMS_ON
)
3282 mode
= DRM_MODE_DPMS_OFF
;
3284 connector
->dpms
= mode
;
3285 crtc
= connector
->state
->crtc
;
3290 state
= drm_atomic_state_alloc(connector
->dev
);
3294 state
->acquire_ctx
= crtc
->dev
->mode_config
.acquire_ctx
;
3296 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
3297 if (IS_ERR(crtc_state
)) {
3298 ret
= PTR_ERR(crtc_state
);
3302 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
3304 drm_connector_list_iter_begin(connector
->dev
, &conn_iter
);
3305 drm_for_each_connector_iter(tmp_connector
, &conn_iter
) {
3306 if (tmp_connector
->state
->crtc
!= crtc
)
3309 if (tmp_connector
->dpms
== DRM_MODE_DPMS_ON
) {
3314 drm_connector_list_iter_end(&conn_iter
);
3315 crtc_state
->active
= active
;
3317 ret
= drm_atomic_commit(state
);
3319 if (ret
== -EDEADLK
)
3322 connector
->dpms
= old_mode
;
3323 drm_atomic_state_put(state
);
3327 drm_atomic_state_clear(state
);
3328 drm_atomic_legacy_backoff(state
);
3332 EXPORT_SYMBOL(drm_atomic_helper_connector_dpms
);
3335 * drm_atomic_helper_best_encoder - Helper for
3336 * &drm_connector_helper_funcs.best_encoder callback
3337 * @connector: Connector control structure
3339 * This is a &drm_connector_helper_funcs.best_encoder callback helper for
3340 * connectors that support exactly 1 encoder, statically determined at driver
3343 struct drm_encoder
*
3344 drm_atomic_helper_best_encoder(struct drm_connector
*connector
)
3346 WARN_ON(connector
->encoder_ids
[1]);
3347 return drm_encoder_find(connector
->dev
, connector
->encoder_ids
[0]);
3349 EXPORT_SYMBOL(drm_atomic_helper_best_encoder
);
3352 * DOC: atomic state reset and initialization
3354 * Both the drm core and the atomic helpers assume that there is always the full
3355 * and correct atomic software state for all connectors, CRTCs and planes
3356 * available. Which is a bit a problem on driver load and also after system
3357 * suspend. One way to solve this is to have a hardware state read-out
3358 * infrastructure which reconstructs the full software state (e.g. the i915
3361 * The simpler solution is to just reset the software state to everything off,
3362 * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
3363 * the atomic helpers provide default reset implementations for all hooks.
3365 * On the upside the precise state tracking of atomic simplifies system suspend
3366 * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
3367 * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
3368 * For other drivers the building blocks are split out, see the documentation
3369 * for these functions.
3373 * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs
3376 * Resets the atomic state for @crtc by freeing the state pointer (which might
3377 * be NULL, e.g. at driver load time) and allocating a new empty state object.
3379 void drm_atomic_helper_crtc_reset(struct drm_crtc
*crtc
)
3382 __drm_atomic_helper_crtc_destroy_state(crtc
->state
);
3385 crtc
->state
= kzalloc(sizeof(*crtc
->state
), GFP_KERNEL
);
3388 crtc
->state
->crtc
= crtc
;
3390 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset
);
3393 * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
3394 * @crtc: CRTC object
3395 * @state: atomic CRTC state
3397 * Copies atomic state from a CRTC's current state and resets inferred values.
3398 * This is useful for drivers that subclass the CRTC state.
3400 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc
*crtc
,
3401 struct drm_crtc_state
*state
)
3403 memcpy(state
, crtc
->state
, sizeof(*state
));
3405 if (state
->mode_blob
)
3406 drm_property_blob_get(state
->mode_blob
);
3407 if (state
->degamma_lut
)
3408 drm_property_blob_get(state
->degamma_lut
);
3410 drm_property_blob_get(state
->ctm
);
3411 if (state
->gamma_lut
)
3412 drm_property_blob_get(state
->gamma_lut
);
3413 state
->mode_changed
= false;
3414 state
->active_changed
= false;
3415 state
->planes_changed
= false;
3416 state
->connectors_changed
= false;
3417 state
->color_mgmt_changed
= false;
3418 state
->zpos_changed
= false;
3419 state
->event
= NULL
;
3420 state
->pageflip_flags
= 0;
3422 EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state
);
3425 * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
3428 * Default CRTC state duplicate hook for drivers which don't have their own
3429 * subclassed CRTC state structure.
3431 struct drm_crtc_state
*
3432 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc
*crtc
)
3434 struct drm_crtc_state
*state
;
3436 if (WARN_ON(!crtc
->state
))
3439 state
= kmalloc(sizeof(*state
), GFP_KERNEL
);
3441 __drm_atomic_helper_crtc_duplicate_state(crtc
, state
);
3445 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state
);
3448 * __drm_atomic_helper_crtc_destroy_state - release CRTC state
3449 * @state: CRTC state object to release
3451 * Releases all resources stored in the CRTC state without actually freeing
3452 * the memory of the CRTC state. This is useful for drivers that subclass the
3455 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state
*state
)
3457 drm_property_blob_put(state
->mode_blob
);
3458 drm_property_blob_put(state
->degamma_lut
);
3459 drm_property_blob_put(state
->ctm
);
3460 drm_property_blob_put(state
->gamma_lut
);
3462 EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state
);
3465 * drm_atomic_helper_crtc_destroy_state - default state destroy hook
3467 * @state: CRTC state object to release
3469 * Default CRTC state destroy hook for drivers which don't have their own
3470 * subclassed CRTC state structure.
3472 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc
*crtc
,
3473 struct drm_crtc_state
*state
)
3475 __drm_atomic_helper_crtc_destroy_state(state
);
3478 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state
);
3481 * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes
3484 * Resets the atomic state for @plane by freeing the state pointer (which might
3485 * be NULL, e.g. at driver load time) and allocating a new empty state object.
3487 void drm_atomic_helper_plane_reset(struct drm_plane
*plane
)
3490 __drm_atomic_helper_plane_destroy_state(plane
->state
);
3492 kfree(plane
->state
);
3493 plane
->state
= kzalloc(sizeof(*plane
->state
), GFP_KERNEL
);
3496 plane
->state
->plane
= plane
;
3497 plane
->state
->rotation
= DRM_MODE_ROTATE_0
;
3500 EXPORT_SYMBOL(drm_atomic_helper_plane_reset
);
3503 * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
3504 * @plane: plane object
3505 * @state: atomic plane state
3507 * Copies atomic state from a plane's current state. This is useful for
3508 * drivers that subclass the plane state.
3510 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane
*plane
,
3511 struct drm_plane_state
*state
)
3513 memcpy(state
, plane
->state
, sizeof(*state
));
3516 drm_framebuffer_get(state
->fb
);
3518 state
->fence
= NULL
;
3520 EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state
);
3523 * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
3526 * Default plane state duplicate hook for drivers which don't have their own
3527 * subclassed plane state structure.
3529 struct drm_plane_state
*
3530 drm_atomic_helper_plane_duplicate_state(struct drm_plane
*plane
)
3532 struct drm_plane_state
*state
;
3534 if (WARN_ON(!plane
->state
))
3537 state
= kmalloc(sizeof(*state
), GFP_KERNEL
);
3539 __drm_atomic_helper_plane_duplicate_state(plane
, state
);
3543 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state
);
3546 * __drm_atomic_helper_plane_destroy_state - release plane state
3547 * @state: plane state object to release
3549 * Releases all resources stored in the plane state without actually freeing
3550 * the memory of the plane state. This is useful for drivers that subclass the
3553 void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state
*state
)
3556 drm_framebuffer_put(state
->fb
);
3559 dma_fence_put(state
->fence
);
3561 EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state
);
3564 * drm_atomic_helper_plane_destroy_state - default state destroy hook
3566 * @state: plane state object to release
3568 * Default plane state destroy hook for drivers which don't have their own
3569 * subclassed plane state structure.
3571 void drm_atomic_helper_plane_destroy_state(struct drm_plane
*plane
,
3572 struct drm_plane_state
*state
)
3574 __drm_atomic_helper_plane_destroy_state(state
);
3577 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state
);
3580 * __drm_atomic_helper_connector_reset - reset state on connector
3581 * @connector: drm connector
3582 * @conn_state: connector state to assign
3584 * Initializes the newly allocated @conn_state and assigns it to
3585 * the &drm_conector->state pointer of @connector, usually required when
3586 * initializing the drivers or when called from the &drm_connector_funcs.reset
3589 * This is useful for drivers that subclass the connector state.
3592 __drm_atomic_helper_connector_reset(struct drm_connector
*connector
,
3593 struct drm_connector_state
*conn_state
)
3596 conn_state
->connector
= connector
;
3598 connector
->state
= conn_state
;
3600 EXPORT_SYMBOL(__drm_atomic_helper_connector_reset
);
3603 * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors
3604 * @connector: drm connector
3606 * Resets the atomic state for @connector by freeing the state pointer (which
3607 * might be NULL, e.g. at driver load time) and allocating a new empty state
3610 void drm_atomic_helper_connector_reset(struct drm_connector
*connector
)
3612 struct drm_connector_state
*conn_state
=
3613 kzalloc(sizeof(*conn_state
), GFP_KERNEL
);
3615 if (connector
->state
)
3616 __drm_atomic_helper_connector_destroy_state(connector
->state
);
3618 kfree(connector
->state
);
3619 __drm_atomic_helper_connector_reset(connector
, conn_state
);
3621 EXPORT_SYMBOL(drm_atomic_helper_connector_reset
);
3624 * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
3625 * @connector: connector object
3626 * @state: atomic connector state
3628 * Copies atomic state from a connector's current state. This is useful for
3629 * drivers that subclass the connector state.
3632 __drm_atomic_helper_connector_duplicate_state(struct drm_connector
*connector
,
3633 struct drm_connector_state
*state
)
3635 memcpy(state
, connector
->state
, sizeof(*state
));
3637 drm_connector_get(connector
);
3639 EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state
);
3642 * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
3643 * @connector: drm connector
3645 * Default connector state duplicate hook for drivers which don't have their own
3646 * subclassed connector state structure.
3648 struct drm_connector_state
*
3649 drm_atomic_helper_connector_duplicate_state(struct drm_connector
*connector
)
3651 struct drm_connector_state
*state
;
3653 if (WARN_ON(!connector
->state
))
3656 state
= kmalloc(sizeof(*state
), GFP_KERNEL
);
3658 __drm_atomic_helper_connector_duplicate_state(connector
, state
);
3662 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state
);
3665 * drm_atomic_helper_duplicate_state - duplicate an atomic state object
3667 * @ctx: lock acquisition context
3669 * Makes a copy of the current atomic state by looping over all objects and
3670 * duplicating their respective states. This is used for example by suspend/
3671 * resume support code to save the state prior to suspend such that it can
3672 * be restored upon resume.
3674 * Note that this treats atomic state as persistent between save and restore.
3675 * Drivers must make sure that this is possible and won't result in confusion
3676 * or erroneous behaviour.
3678 * Note that if callers haven't already acquired all modeset locks this might
3679 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
3682 * A pointer to the copy of the atomic state object on success or an
3683 * ERR_PTR()-encoded error code on failure.
3686 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
3688 struct drm_atomic_state
*
3689 drm_atomic_helper_duplicate_state(struct drm_device
*dev
,
3690 struct drm_modeset_acquire_ctx
*ctx
)
3692 struct drm_atomic_state
*state
;
3693 struct drm_connector
*conn
;
3694 struct drm_connector_list_iter conn_iter
;
3695 struct drm_plane
*plane
;
3696 struct drm_crtc
*crtc
;
3699 state
= drm_atomic_state_alloc(dev
);
3701 return ERR_PTR(-ENOMEM
);
3703 state
->acquire_ctx
= ctx
;
3705 drm_for_each_crtc(crtc
, dev
) {
3706 struct drm_crtc_state
*crtc_state
;
3708 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
3709 if (IS_ERR(crtc_state
)) {
3710 err
= PTR_ERR(crtc_state
);
3715 drm_for_each_plane(plane
, dev
) {
3716 struct drm_plane_state
*plane_state
;
3718 plane_state
= drm_atomic_get_plane_state(state
, plane
);
3719 if (IS_ERR(plane_state
)) {
3720 err
= PTR_ERR(plane_state
);
3725 drm_connector_list_iter_begin(dev
, &conn_iter
);
3726 drm_for_each_connector_iter(conn
, &conn_iter
) {
3727 struct drm_connector_state
*conn_state
;
3729 conn_state
= drm_atomic_get_connector_state(state
, conn
);
3730 if (IS_ERR(conn_state
)) {
3731 err
= PTR_ERR(conn_state
);
3732 drm_connector_list_iter_end(&conn_iter
);
3736 drm_connector_list_iter_end(&conn_iter
);
3738 /* clear the acquire context so that it isn't accidentally reused */
3739 state
->acquire_ctx
= NULL
;
3743 drm_atomic_state_put(state
);
3744 state
= ERR_PTR(err
);
3749 EXPORT_SYMBOL(drm_atomic_helper_duplicate_state
);
3752 * __drm_atomic_helper_connector_destroy_state - release connector state
3753 * @state: connector state object to release
3755 * Releases all resources stored in the connector state without actually
3756 * freeing the memory of the connector state. This is useful for drivers that
3757 * subclass the connector state.
3760 __drm_atomic_helper_connector_destroy_state(struct drm_connector_state
*state
)
3763 drm_connector_put(state
->connector
);
3765 EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state
);
3768 * drm_atomic_helper_connector_destroy_state - default state destroy hook
3769 * @connector: drm connector
3770 * @state: connector state object to release
3772 * Default connector state destroy hook for drivers which don't have their own
3773 * subclassed connector state structure.
3775 void drm_atomic_helper_connector_destroy_state(struct drm_connector
*connector
,
3776 struct drm_connector_state
*state
)
3778 __drm_atomic_helper_connector_destroy_state(state
);
3781 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state
);
3784 * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
3785 * @crtc: CRTC object
3786 * @red: red correction table
3787 * @green: green correction table
3788 * @blue: green correction table
3789 * @size: size of the tables
3790 * @ctx: lock acquire context
3792 * Implements support for legacy gamma correction table for drivers
3793 * that support color management through the DEGAMMA_LUT/GAMMA_LUT
3794 * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for
3795 * how the atomic color management and gamma tables work.
3797 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc
*crtc
,
3798 u16
*red
, u16
*green
, u16
*blue
,
3800 struct drm_modeset_acquire_ctx
*ctx
)
3802 struct drm_device
*dev
= crtc
->dev
;
3803 struct drm_atomic_state
*state
;
3804 struct drm_crtc_state
*crtc_state
;
3805 struct drm_property_blob
*blob
= NULL
;
3806 struct drm_color_lut
*blob_data
;
3810 state
= drm_atomic_state_alloc(crtc
->dev
);
3814 blob
= drm_property_create_blob(dev
,
3815 sizeof(struct drm_color_lut
) * size
,
3818 ret
= PTR_ERR(blob
);
3823 /* Prepare GAMMA_LUT with the legacy values. */
3824 blob_data
= (struct drm_color_lut
*) blob
->data
;
3825 for (i
= 0; i
< size
; i
++) {
3826 blob_data
[i
].red
= red
[i
];
3827 blob_data
[i
].green
= green
[i
];
3828 blob_data
[i
].blue
= blue
[i
];
3831 state
->acquire_ctx
= ctx
;
3832 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
3833 if (IS_ERR(crtc_state
)) {
3834 ret
= PTR_ERR(crtc_state
);
3838 /* Reset DEGAMMA_LUT and CTM properties. */
3839 replaced
= drm_property_replace_blob(&crtc_state
->degamma_lut
, NULL
);
3840 replaced
|= drm_property_replace_blob(&crtc_state
->ctm
, NULL
);
3841 replaced
|= drm_property_replace_blob(&crtc_state
->gamma_lut
, blob
);
3842 crtc_state
->color_mgmt_changed
|= replaced
;
3844 ret
= drm_atomic_commit(state
);
3847 drm_atomic_state_put(state
);
3848 drm_property_blob_put(blob
);
3851 EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set
);
3854 * __drm_atomic_helper_private_duplicate_state - copy atomic private state
3856 * @state: new private object state
3858 * Copies atomic state from a private objects's current state and resets inferred values.
3859 * This is useful for drivers that subclass the private state.
3861 void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj
*obj
,
3862 struct drm_private_state
*state
)
3864 memcpy(state
, obj
->state
, sizeof(*state
));
3866 EXPORT_SYMBOL(__drm_atomic_helper_private_obj_duplicate_state
);