2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
29 #include <drm/drm_atomic.h>
30 #include <drm/drm_plane_helper.h>
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/drm_atomic_helper.h>
33 #include <linux/fence.h>
38 * This helper library provides implementations of check and commit functions on
39 * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
40 * also provides convenience implementations for the atomic state handling
41 * callbacks for drivers which don't need to subclass the drm core structures to
42 * add their own additional internal state.
44 * This library also provides default implementations for the check callback in
45 * drm_atomic_helper_check() and for the commit callback with
46 * drm_atomic_helper_commit(). But the individual stages and callbacks are
47 * exposed to allow drivers to mix and match and e.g. use the plane helpers only
48 * together with a driver private modeset implementation.
50 * This library also provides implementations for all the legacy driver
51 * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
52 * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the
53 * various functions to implement set_property callbacks. New drivers must not
54 * implement these functions themselves but must use the provided helpers.
57 drm_atomic_helper_plane_changed(struct drm_atomic_state
*state
,
58 struct drm_plane_state
*plane_state
,
59 struct drm_plane
*plane
)
61 struct drm_crtc_state
*crtc_state
;
63 if (plane
->state
->crtc
) {
64 crtc_state
= state
->crtc_states
[drm_crtc_index(plane
->state
->crtc
)];
66 if (WARN_ON(!crtc_state
))
69 crtc_state
->planes_changed
= true;
72 if (plane_state
->crtc
) {
74 state
->crtc_states
[drm_crtc_index(plane_state
->crtc
)];
76 if (WARN_ON(!crtc_state
))
79 crtc_state
->planes_changed
= true;
83 static struct drm_crtc
*
84 get_current_crtc_for_encoder(struct drm_device
*dev
,
85 struct drm_encoder
*encoder
)
87 struct drm_mode_config
*config
= &dev
->mode_config
;
88 struct drm_connector
*connector
;
90 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
92 drm_for_each_connector(connector
, dev
) {
93 if (connector
->state
->best_encoder
!= encoder
)
96 return connector
->state
->crtc
;
103 steal_encoder(struct drm_atomic_state
*state
,
104 struct drm_encoder
*encoder
,
105 struct drm_crtc
*encoder_crtc
)
107 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
108 struct drm_crtc_state
*crtc_state
;
109 struct drm_connector
*connector
;
110 struct drm_connector_state
*connector_state
;
114 * We can only steal an encoder coming from a connector, which means we
115 * must already hold the connection_mutex.
117 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
119 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
120 encoder
->base
.id
, encoder
->name
,
121 encoder_crtc
->base
.id
);
123 crtc_state
= drm_atomic_get_crtc_state(state
, encoder_crtc
);
124 if (IS_ERR(crtc_state
))
125 return PTR_ERR(crtc_state
);
127 crtc_state
->connectors_changed
= true;
129 list_for_each_entry(connector
, &config
->connector_list
, head
) {
130 if (connector
->state
->best_encoder
!= encoder
)
133 DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n",
137 connector_state
= drm_atomic_get_connector_state(state
,
139 if (IS_ERR(connector_state
))
140 return PTR_ERR(connector_state
);
142 ret
= drm_atomic_set_crtc_for_connector(connector_state
, NULL
);
145 connector_state
->best_encoder
= NULL
;
152 update_connector_routing(struct drm_atomic_state
*state
, int conn_idx
)
154 const struct drm_connector_helper_funcs
*funcs
;
155 struct drm_encoder
*new_encoder
;
156 struct drm_crtc
*encoder_crtc
;
157 struct drm_connector
*connector
;
158 struct drm_connector_state
*connector_state
;
159 struct drm_crtc_state
*crtc_state
;
162 connector
= state
->connectors
[conn_idx
];
163 connector_state
= state
->connector_states
[conn_idx
];
168 DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n",
172 if (connector
->state
->crtc
!= connector_state
->crtc
) {
173 if (connector
->state
->crtc
) {
174 idx
= drm_crtc_index(connector
->state
->crtc
);
176 crtc_state
= state
->crtc_states
[idx
];
177 crtc_state
->connectors_changed
= true;
180 if (connector_state
->crtc
) {
181 idx
= drm_crtc_index(connector_state
->crtc
);
183 crtc_state
= state
->crtc_states
[idx
];
184 crtc_state
->connectors_changed
= true;
188 if (!connector_state
->crtc
) {
189 DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
193 connector_state
->best_encoder
= NULL
;
198 funcs
= connector
->helper_private
;
200 if (funcs
->atomic_best_encoder
)
201 new_encoder
= funcs
->atomic_best_encoder(connector
,
204 new_encoder
= funcs
->best_encoder(connector
);
207 DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
213 if (!drm_encoder_crtc_ok(new_encoder
, connector_state
->crtc
)) {
214 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n",
215 new_encoder
->base
.id
,
217 connector_state
->crtc
->base
.id
);
221 if (new_encoder
== connector_state
->best_encoder
) {
222 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n",
225 new_encoder
->base
.id
,
227 connector_state
->crtc
->base
.id
);
232 encoder_crtc
= get_current_crtc_for_encoder(state
->dev
,
236 ret
= steal_encoder(state
, new_encoder
, encoder_crtc
);
238 DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n",
245 if (WARN_ON(!connector_state
->crtc
))
248 connector_state
->best_encoder
= new_encoder
;
249 idx
= drm_crtc_index(connector_state
->crtc
);
251 crtc_state
= state
->crtc_states
[idx
];
252 crtc_state
->connectors_changed
= true;
254 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n",
257 new_encoder
->base
.id
,
259 connector_state
->crtc
->base
.id
);
265 mode_fixup(struct drm_atomic_state
*state
)
267 struct drm_crtc
*crtc
;
268 struct drm_crtc_state
*crtc_state
;
269 struct drm_connector
*connector
;
270 struct drm_connector_state
*conn_state
;
274 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
275 if (!crtc_state
->mode_changed
&&
276 !crtc_state
->connectors_changed
)
279 drm_mode_copy(&crtc_state
->adjusted_mode
, &crtc_state
->mode
);
282 for_each_connector_in_state(state
, connector
, conn_state
, i
) {
283 const struct drm_encoder_helper_funcs
*funcs
;
284 struct drm_encoder
*encoder
;
286 WARN_ON(!!conn_state
->best_encoder
!= !!conn_state
->crtc
);
288 if (!conn_state
->crtc
|| !conn_state
->best_encoder
)
292 state
->crtc_states
[drm_crtc_index(conn_state
->crtc
)];
295 * Each encoder has at most one connector (since we always steal
296 * it away), so we won't call ->mode_fixup twice.
298 encoder
= conn_state
->best_encoder
;
299 funcs
= encoder
->helper_private
;
303 ret
= drm_bridge_mode_fixup(encoder
->bridge
, &crtc_state
->mode
,
304 &crtc_state
->adjusted_mode
);
306 DRM_DEBUG_ATOMIC("Bridge fixup failed\n");
310 if (funcs
->atomic_check
) {
311 ret
= funcs
->atomic_check(encoder
, crtc_state
,
314 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n",
315 encoder
->base
.id
, encoder
->name
);
318 } else if (funcs
->mode_fixup
) {
319 ret
= funcs
->mode_fixup(encoder
, &crtc_state
->mode
,
320 &crtc_state
->adjusted_mode
);
322 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n",
323 encoder
->base
.id
, encoder
->name
);
329 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
330 const struct drm_crtc_helper_funcs
*funcs
;
332 if (!crtc_state
->mode_changed
&&
333 !crtc_state
->connectors_changed
)
336 funcs
= crtc
->helper_private
;
337 if (!funcs
->mode_fixup
)
340 ret
= funcs
->mode_fixup(crtc
, &crtc_state
->mode
,
341 &crtc_state
->adjusted_mode
);
343 DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n",
353 * drm_atomic_helper_check_modeset - validate state object for modeset changes
355 * @state: the driver state object
357 * Check the state object to see if the requested state is physically possible.
358 * This does all the crtc and connector related computations for an atomic
359 * update and adds any additional connectors needed for full modesets and calls
360 * down into ->mode_fixup functions of the driver backend.
362 * crtc_state->mode_changed is set when the input mode is changed.
363 * crtc_state->connectors_changed is set when a connector is added or
364 * removed from the crtc.
365 * crtc_state->active_changed is set when crtc_state->active changes,
366 * which is used for dpms.
370 * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a
371 * plane update can't be done without a full modeset) _must_ call this function
372 * afterwards after that change. It is permitted to call this function multiple
373 * times for the same update, e.g. when the ->atomic_check functions depend upon
374 * the adjusted dotclock for fifo space allocation and watermark computation.
377 * Zero for success or -errno
380 drm_atomic_helper_check_modeset(struct drm_device
*dev
,
381 struct drm_atomic_state
*state
)
383 struct drm_crtc
*crtc
;
384 struct drm_crtc_state
*crtc_state
;
385 struct drm_connector
*connector
;
386 struct drm_connector_state
*connector_state
;
389 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
390 if (!drm_mode_equal(&crtc
->state
->mode
, &crtc_state
->mode
)) {
391 DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n",
393 crtc_state
->mode_changed
= true;
396 if (crtc
->state
->enable
!= crtc_state
->enable
) {
397 DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n",
401 * For clarity this assignment is done here, but
402 * enable == 0 is only true when there are no
403 * connectors and a NULL mode.
405 * The other way around is true as well. enable != 0
406 * iff connectors are attached and a mode is set.
408 crtc_state
->mode_changed
= true;
409 crtc_state
->connectors_changed
= true;
413 for_each_connector_in_state(state
, connector
, connector_state
, i
) {
415 * This only sets crtc->mode_changed for routing changes,
416 * drivers must set crtc->mode_changed themselves when connector
417 * properties need to be updated.
419 ret
= update_connector_routing(state
, i
);
425 * After all the routing has been prepared we need to add in any
426 * connector which is itself unchanged, but who's crtc changes it's
427 * configuration. This must be done before calling mode_fixup in case a
428 * crtc only changed its mode but has the same set of connectors.
430 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
434 * We must set ->active_changed after walking connectors for
435 * otherwise an update that only changes active would result in
436 * a full modeset because update_connector_routing force that.
438 if (crtc
->state
->active
!= crtc_state
->active
) {
439 DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n",
441 crtc_state
->active_changed
= true;
444 if (!drm_atomic_crtc_needs_modeset(crtc_state
))
447 DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n",
449 crtc_state
->enable
? 'y' : 'n',
450 crtc_state
->active
? 'y' : 'n');
452 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
456 ret
= drm_atomic_add_affected_planes(state
, crtc
);
460 num_connectors
= drm_atomic_connectors_for_crtc(state
,
463 if (crtc_state
->enable
!= !!num_connectors
) {
464 DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n",
471 return mode_fixup(state
);
473 EXPORT_SYMBOL(drm_atomic_helper_check_modeset
);
476 * drm_atomic_helper_check_planes - validate state object for planes changes
478 * @state: the driver state object
480 * Check the state object to see if the requested state is physically possible.
481 * This does all the plane update related checks using by calling into the
482 * ->atomic_check hooks provided by the driver.
484 * It also sets crtc_state->planes_changed to indicate that a crtc has
488 * Zero for success or -errno
491 drm_atomic_helper_check_planes(struct drm_device
*dev
,
492 struct drm_atomic_state
*state
)
494 struct drm_crtc
*crtc
;
495 struct drm_crtc_state
*crtc_state
;
496 struct drm_plane
*plane
;
497 struct drm_plane_state
*plane_state
;
500 for_each_plane_in_state(state
, plane
, plane_state
, i
) {
501 const struct drm_plane_helper_funcs
*funcs
;
503 funcs
= plane
->helper_private
;
505 drm_atomic_helper_plane_changed(state
, plane_state
, plane
);
507 if (!funcs
|| !funcs
->atomic_check
)
510 ret
= funcs
->atomic_check(plane
, plane_state
);
512 DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n",
518 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
519 const struct drm_crtc_helper_funcs
*funcs
;
521 funcs
= crtc
->helper_private
;
523 if (!funcs
|| !funcs
->atomic_check
)
526 ret
= funcs
->atomic_check(crtc
, state
->crtc_states
[i
]);
528 DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n",
536 EXPORT_SYMBOL(drm_atomic_helper_check_planes
);
539 * drm_atomic_helper_check - validate state object
541 * @state: the driver state object
543 * Check the state object to see if the requested state is physically possible.
544 * Only crtcs and planes have check callbacks, so for any additional (global)
545 * checking that a driver needs it can simply wrap that around this function.
546 * Drivers without such needs can directly use this as their ->atomic_check()
549 * This just wraps the two parts of the state checking for planes and modeset
550 * state in the default order: First it calls drm_atomic_helper_check_modeset()
551 * and then drm_atomic_helper_check_planes(). The assumption is that the
552 * ->atomic_check functions depend upon an updated adjusted_mode.clock to
553 * e.g. properly compute watermarks.
556 * Zero for success or -errno
558 int drm_atomic_helper_check(struct drm_device
*dev
,
559 struct drm_atomic_state
*state
)
563 ret
= drm_atomic_helper_check_modeset(dev
, state
);
567 ret
= drm_atomic_helper_check_planes(dev
, state
);
573 EXPORT_SYMBOL(drm_atomic_helper_check
);
576 disable_outputs(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
578 struct drm_connector
*connector
;
579 struct drm_connector_state
*old_conn_state
;
580 struct drm_crtc
*crtc
;
581 struct drm_crtc_state
*old_crtc_state
;
584 for_each_connector_in_state(old_state
, connector
, old_conn_state
, i
) {
585 const struct drm_encoder_helper_funcs
*funcs
;
586 struct drm_encoder
*encoder
;
587 struct drm_crtc_state
*old_crtc_state
;
589 /* Shut down everything that's in the changeset and currently
590 * still on. So need to check the old, saved state. */
591 if (!old_conn_state
->crtc
)
594 old_crtc_state
= old_state
->crtc_states
[drm_crtc_index(old_conn_state
->crtc
)];
596 if (!old_crtc_state
->active
||
597 !drm_atomic_crtc_needs_modeset(old_conn_state
->crtc
->state
))
600 encoder
= old_conn_state
->best_encoder
;
602 /* We shouldn't get this far if we didn't previously have
603 * an encoder.. but WARN_ON() rather than explode.
605 if (WARN_ON(!encoder
))
608 funcs
= encoder
->helper_private
;
610 DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
611 encoder
->base
.id
, encoder
->name
);
614 * Each encoder has at most one connector (since we always steal
615 * it away), so we won't call disable hooks twice.
617 drm_bridge_disable(encoder
->bridge
);
619 /* Right function depends upon target state. */
620 if (connector
->state
->crtc
&& funcs
->prepare
)
621 funcs
->prepare(encoder
);
622 else if (funcs
->disable
)
623 funcs
->disable(encoder
);
625 funcs
->dpms(encoder
, DRM_MODE_DPMS_OFF
);
627 drm_bridge_post_disable(encoder
->bridge
);
630 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
631 const struct drm_crtc_helper_funcs
*funcs
;
633 /* Shut down everything that needs a full modeset. */
634 if (!drm_atomic_crtc_needs_modeset(crtc
->state
))
637 if (!old_crtc_state
->active
)
640 funcs
= crtc
->helper_private
;
642 DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n",
646 /* Right function depends upon target state. */
647 if (crtc
->state
->enable
&& funcs
->prepare
)
648 funcs
->prepare(crtc
);
649 else if (funcs
->disable
)
650 funcs
->disable(crtc
);
652 funcs
->dpms(crtc
, DRM_MODE_DPMS_OFF
);
657 * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
659 * @old_state: atomic state object with old state structures
661 * This function updates all the various legacy modeset state pointers in
662 * connectors, encoders and crtcs. It also updates the timestamping constants
663 * used for precise vblank timestamps by calling
664 * drm_calc_timestamping_constants().
666 * Drivers can use this for building their own atomic commit if they don't have
667 * a pure helper-based modeset implementation.
670 drm_atomic_helper_update_legacy_modeset_state(struct drm_device
*dev
,
671 struct drm_atomic_state
*old_state
)
673 struct drm_connector
*connector
;
674 struct drm_connector_state
*old_conn_state
;
675 struct drm_crtc
*crtc
;
676 struct drm_crtc_state
*old_crtc_state
;
679 /* clear out existing links and update dpms */
680 for_each_connector_in_state(old_state
, connector
, old_conn_state
, i
) {
681 if (connector
->encoder
) {
682 WARN_ON(!connector
->encoder
->crtc
);
684 connector
->encoder
->crtc
= NULL
;
685 connector
->encoder
= NULL
;
688 crtc
= connector
->state
->crtc
;
689 if ((!crtc
&& old_conn_state
->crtc
) ||
690 (crtc
&& drm_atomic_crtc_needs_modeset(crtc
->state
))) {
691 struct drm_property
*dpms_prop
=
692 dev
->mode_config
.dpms_property
;
693 int mode
= DRM_MODE_DPMS_OFF
;
695 if (crtc
&& crtc
->state
->active
)
696 mode
= DRM_MODE_DPMS_ON
;
698 connector
->dpms
= mode
;
699 drm_object_property_set_value(&connector
->base
,
705 for_each_connector_in_state(old_state
, connector
, old_conn_state
, i
) {
706 if (!connector
->state
->crtc
)
709 if (WARN_ON(!connector
->state
->best_encoder
))
712 connector
->encoder
= connector
->state
->best_encoder
;
713 connector
->encoder
->crtc
= connector
->state
->crtc
;
716 /* set legacy state in the crtc structure */
717 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
718 struct drm_plane
*primary
= crtc
->primary
;
720 crtc
->mode
= crtc
->state
->mode
;
721 crtc
->enabled
= crtc
->state
->enable
;
723 if (drm_atomic_get_existing_plane_state(old_state
, primary
) &&
724 primary
->state
->crtc
== crtc
) {
725 crtc
->x
= primary
->state
->src_x
>> 16;
726 crtc
->y
= primary
->state
->src_y
>> 16;
729 if (crtc
->state
->enable
)
730 drm_calc_timestamping_constants(crtc
,
731 &crtc
->state
->adjusted_mode
);
734 EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state
);
737 crtc_set_mode(struct drm_device
*dev
, struct drm_atomic_state
*old_state
)
739 struct drm_crtc
*crtc
;
740 struct drm_crtc_state
*old_crtc_state
;
741 struct drm_connector
*connector
;
742 struct drm_connector_state
*old_conn_state
;
745 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
746 const struct drm_crtc_helper_funcs
*funcs
;
748 if (!crtc
->state
->mode_changed
)
751 funcs
= crtc
->helper_private
;
753 if (crtc
->state
->enable
&& funcs
->mode_set_nofb
) {
754 DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n",
757 funcs
->mode_set_nofb(crtc
);
761 for_each_connector_in_state(old_state
, connector
, old_conn_state
, i
) {
762 const struct drm_encoder_helper_funcs
*funcs
;
763 struct drm_crtc_state
*new_crtc_state
;
764 struct drm_encoder
*encoder
;
765 struct drm_display_mode
*mode
, *adjusted_mode
;
767 if (!connector
->state
->best_encoder
)
770 encoder
= connector
->state
->best_encoder
;
771 funcs
= encoder
->helper_private
;
772 new_crtc_state
= connector
->state
->crtc
->state
;
773 mode
= &new_crtc_state
->mode
;
774 adjusted_mode
= &new_crtc_state
->adjusted_mode
;
776 if (!new_crtc_state
->mode_changed
)
779 DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n",
780 encoder
->base
.id
, encoder
->name
);
783 * Each encoder has at most one connector (since we always steal
784 * it away), so we won't call mode_set hooks twice.
787 funcs
->mode_set(encoder
, mode
, adjusted_mode
);
789 drm_bridge_mode_set(encoder
->bridge
, mode
, adjusted_mode
);
794 * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
796 * @old_state: atomic state object with old state structures
798 * This function shuts down all the outputs that need to be shut down and
799 * prepares them (if required) with the new mode.
801 * For compatibility with legacy crtc helpers this should be called before
802 * drm_atomic_helper_commit_planes(), which is what the default commit function
803 * does. But drivers with different needs can group the modeset commits together
804 * and do the plane commits at the end. This is useful for drivers doing runtime
805 * PM since planes updates then only happen when the CRTC is actually enabled.
807 void drm_atomic_helper_commit_modeset_disables(struct drm_device
*dev
,
808 struct drm_atomic_state
*old_state
)
810 disable_outputs(dev
, old_state
);
812 drm_atomic_helper_update_legacy_modeset_state(dev
, old_state
);
814 crtc_set_mode(dev
, old_state
);
816 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables
);
819 * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
821 * @old_state: atomic state object with old state structures
823 * This function enables all the outputs with the new configuration which had to
824 * be turned off for the update.
826 * For compatibility with legacy crtc helpers this should be called after
827 * drm_atomic_helper_commit_planes(), which is what the default commit function
828 * does. But drivers with different needs can group the modeset commits together
829 * and do the plane commits at the end. This is useful for drivers doing runtime
830 * PM since planes updates then only happen when the CRTC is actually enabled.
832 void drm_atomic_helper_commit_modeset_enables(struct drm_device
*dev
,
833 struct drm_atomic_state
*old_state
)
835 struct drm_crtc
*crtc
;
836 struct drm_crtc_state
*old_crtc_state
;
837 struct drm_connector
*connector
;
838 struct drm_connector_state
*old_conn_state
;
841 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
842 const struct drm_crtc_helper_funcs
*funcs
;
844 /* Need to filter out CRTCs where only planes change. */
845 if (!drm_atomic_crtc_needs_modeset(crtc
->state
))
848 if (!crtc
->state
->active
)
851 funcs
= crtc
->helper_private
;
853 if (crtc
->state
->enable
) {
854 DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n",
864 for_each_connector_in_state(old_state
, connector
, old_conn_state
, i
) {
865 const struct drm_encoder_helper_funcs
*funcs
;
866 struct drm_encoder
*encoder
;
868 if (!connector
->state
->best_encoder
)
871 if (!connector
->state
->crtc
->state
->active
||
872 !drm_atomic_crtc_needs_modeset(connector
->state
->crtc
->state
))
875 encoder
= connector
->state
->best_encoder
;
876 funcs
= encoder
->helper_private
;
878 DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
879 encoder
->base
.id
, encoder
->name
);
882 * Each encoder has at most one connector (since we always steal
883 * it away), so we won't call enable hooks twice.
885 drm_bridge_pre_enable(encoder
->bridge
);
888 funcs
->enable(encoder
);
890 funcs
->commit(encoder
);
892 drm_bridge_enable(encoder
->bridge
);
895 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables
);
897 static void wait_for_fences(struct drm_device
*dev
,
898 struct drm_atomic_state
*state
)
900 /* XXX: implement linux/fence.h first */
902 struct drm_plane
*plane
;
903 struct drm_plane_state
*plane_state
;
906 for_each_plane_in_state(state
, plane
, plane_state
, i
) {
907 if (!plane
->state
->fence
)
910 WARN_ON(!plane
->state
->fb
);
912 fence_wait(plane
->state
->fence
, false);
913 fence_put(plane
->state
->fence
);
914 plane
->state
->fence
= NULL
;
919 static bool framebuffer_changed(struct drm_device
*dev
,
920 struct drm_atomic_state
*old_state
,
921 struct drm_crtc
*crtc
)
923 struct drm_plane
*plane
;
924 struct drm_plane_state
*old_plane_state
;
927 for_each_plane_in_state(old_state
, plane
, old_plane_state
, i
) {
928 if (plane
->state
->crtc
!= crtc
&&
929 old_plane_state
->crtc
!= crtc
)
932 if (plane
->state
->fb
!= old_plane_state
->fb
)
940 * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs
942 * @old_state: atomic state object with old state structures
944 * Helper to, after atomic commit, wait for vblanks on all effected
945 * crtcs (ie. before cleaning up old framebuffers using
946 * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the
947 * framebuffers have actually changed to optimize for the legacy cursor and
948 * plane update use-case.
951 drm_atomic_helper_wait_for_vblanks(struct drm_device
*dev
,
952 struct drm_atomic_state
*old_state
)
954 struct drm_crtc
*crtc
;
955 struct drm_crtc_state
*old_crtc_state
;
958 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
959 /* No one cares about the old state, so abuse it for tracking
960 * and store whether we hold a vblank reference (and should do a
961 * vblank wait) in the ->enable boolean. */
962 old_crtc_state
->enable
= false;
964 if (!crtc
->state
->enable
)
967 /* Legacy cursor ioctls are completely unsynced, and userspace
968 * relies on that (by doing tons of cursor updates). */
969 if (old_state
->legacy_cursor_update
)
972 if (!framebuffer_changed(dev
, old_state
, crtc
))
975 ret
= drm_crtc_vblank_get(crtc
);
979 old_crtc_state
->enable
= true;
980 old_crtc_state
->last_vblank_count
= drm_crtc_vblank_count(crtc
);
983 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
984 if (!old_crtc_state
->enable
)
987 ret
= wait_event_timeout(dev
->vblank
[i
].queue
,
988 old_crtc_state
->last_vblank_count
!=
989 drm_crtc_vblank_count(crtc
),
990 msecs_to_jiffies(50));
992 drm_crtc_vblank_put(crtc
);
995 EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks
);
998 * drm_atomic_helper_commit - commit validated state object
1000 * @state: the driver state object
1001 * @async: asynchronous commit
1003 * This function commits a with drm_atomic_helper_check() pre-validated state
1004 * object. This can still fail when e.g. the framebuffer reservation fails. For
1005 * now this doesn't implement asynchronous commits.
1007 * Note that right now this function does not support async commits, and hence
1008 * driver writers must implement their own version for now. Also note that the
1009 * default ordering of how the various stages are called is to match the legacy
1010 * modeset helper library closest. One peculiarity of that is that it doesn't
1011 * mesh well with runtime PM at all.
1013 * For drivers supporting runtime PM the recommended sequence is
1015 * drm_atomic_helper_commit_modeset_disables(dev, state);
1017 * drm_atomic_helper_commit_modeset_enables(dev, state);
1019 * drm_atomic_helper_commit_planes(dev, state, true);
1021 * See the kerneldoc entries for these three functions for more details.
1024 * Zero for success or -errno.
1026 int drm_atomic_helper_commit(struct drm_device
*dev
,
1027 struct drm_atomic_state
*state
,
1035 ret
= drm_atomic_helper_prepare_planes(dev
, state
);
1040 * This is the point of no return - everything below never fails except
1041 * when the hw goes bonghits. Which means we can commit the new state on
1042 * the software side now.
1045 drm_atomic_helper_swap_state(dev
, state
);
1048 * Everything below can be run asynchronously without the need to grab
1049 * any modeset locks at all under one condition: It must be guaranteed
1050 * that the asynchronous work has either been cancelled (if the driver
1051 * supports it, which at least requires that the framebuffers get
1052 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
1053 * before the new state gets committed on the software side with
1054 * drm_atomic_helper_swap_state().
1056 * This scheme allows new atomic state updates to be prepared and
1057 * checked in parallel to the asynchronous completion of the previous
1058 * update. Which is important since compositors need to figure out the
1059 * composition of the next frame right after having submitted the
1063 wait_for_fences(dev
, state
);
1065 drm_atomic_helper_commit_modeset_disables(dev
, state
);
1067 drm_atomic_helper_commit_planes(dev
, state
, false);
1069 drm_atomic_helper_commit_modeset_enables(dev
, state
);
1071 drm_atomic_helper_wait_for_vblanks(dev
, state
);
1073 drm_atomic_helper_cleanup_planes(dev
, state
);
1075 drm_atomic_state_free(state
);
1079 EXPORT_SYMBOL(drm_atomic_helper_commit
);
1082 * DOC: implementing async commit
1084 * For now the atomic helpers don't support async commit directly. If there is
1085 * real need it could be added though, using the dma-buf fence infrastructure
1086 * for generic synchronization with outstanding rendering.
1088 * For now drivers have to implement async commit themselves, with the following
1089 * sequence being the recommended one:
1091 * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
1092 * which commit needs to call which can fail, so we want to run it first and
1095 * 2. Synchronize with any outstanding asynchronous commit worker threads which
1096 * might be affected the new state update. This can be done by either cancelling
1097 * or flushing the work items, depending upon whether the driver can deal with
1098 * cancelled updates. Note that it is important to ensure that the framebuffer
1099 * cleanup is still done when cancelling.
1101 * For sufficient parallelism it is recommended to have a work item per crtc
1102 * (for updates which don't touch global state) and a global one. Then we only
1103 * need to synchronize with the crtc work items for changed crtcs and the global
1104 * work item, which allows nice concurrent updates on disjoint sets of crtcs.
1106 * 3. The software state is updated synchronously with
1107 * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
1108 * locks means concurrent callers never see inconsistent state. And doing this
1109 * while it's guaranteed that no relevant async worker runs means that async
1110 * workers do not need grab any locks. Actually they must not grab locks, for
1111 * otherwise the work flushing will deadlock.
1113 * 4. Schedule a work item to do all subsequent steps, using the split-out
1114 * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
1115 * then cleaning up the framebuffers after the old framebuffer is no longer
1120 * drm_atomic_helper_prepare_planes - prepare plane resources before commit
1122 * @state: atomic state object with new state structures
1124 * This function prepares plane state, specifically framebuffers, for the new
1125 * configuration. If any failure is encountered this function will call
1126 * ->cleanup_fb on any already successfully prepared framebuffer.
1129 * 0 on success, negative error code on failure.
1131 int drm_atomic_helper_prepare_planes(struct drm_device
*dev
,
1132 struct drm_atomic_state
*state
)
1134 int nplanes
= dev
->mode_config
.num_total_plane
;
1137 for (i
= 0; i
< nplanes
; i
++) {
1138 const struct drm_plane_helper_funcs
*funcs
;
1139 struct drm_plane
*plane
= state
->planes
[i
];
1140 struct drm_plane_state
*plane_state
= state
->plane_states
[i
];
1145 funcs
= plane
->helper_private
;
1147 if (funcs
->prepare_fb
) {
1148 ret
= funcs
->prepare_fb(plane
, plane_state
);
1157 for (i
--; i
>= 0; i
--) {
1158 const struct drm_plane_helper_funcs
*funcs
;
1159 struct drm_plane
*plane
= state
->planes
[i
];
1160 struct drm_plane_state
*plane_state
= state
->plane_states
[i
];
1165 funcs
= plane
->helper_private
;
1167 if (funcs
->cleanup_fb
)
1168 funcs
->cleanup_fb(plane
, plane_state
);
1174 EXPORT_SYMBOL(drm_atomic_helper_prepare_planes
);
1176 static bool plane_crtc_active(struct drm_plane_state
*state
)
1178 return state
->crtc
&& state
->crtc
->state
->active
;
1182 * drm_atomic_helper_commit_planes - commit plane state
1184 * @old_state: atomic state object with old state structures
1185 * @active_only: Only commit on active CRTC if set
1187 * This function commits the new plane state using the plane and atomic helper
1188 * functions for planes and crtcs. It assumes that the atomic state has already
1189 * been pushed into the relevant object state pointers, since this step can no
1192 * It still requires the global state object @old_state to know which planes and
1193 * crtcs need to be updated though.
1195 * Note that this function does all plane updates across all CRTCs in one step.
1196 * If the hardware can't support this approach look at
1197 * drm_atomic_helper_commit_planes_on_crtc() instead.
1199 * Plane parameters can be updated by applications while the associated CRTC is
1200 * disabled. The DRM/KMS core will store the parameters in the plane state,
1201 * which will be available to the driver when the CRTC is turned on. As a result
1202 * most drivers don't need to be immediately notified of plane updates for a
1205 * Unless otherwise needed, drivers are advised to set the @active_only
1206 * parameters to true in order not to receive plane update notifications related
1207 * to a disabled CRTC. This avoids the need to manually ignore plane updates in
1208 * driver code when the driver and/or hardware can't or just don't need to deal
1209 * with updates on disabled CRTCs, for example when supporting runtime PM.
1211 * The drm_atomic_helper_commit() default implementation only sets @active_only
1212 * to false to most closely match the behaviour of the legacy helpers. This should
1213 * not be copied blindly by drivers.
1215 void drm_atomic_helper_commit_planes(struct drm_device
*dev
,
1216 struct drm_atomic_state
*old_state
,
1219 struct drm_crtc
*crtc
;
1220 struct drm_crtc_state
*old_crtc_state
;
1221 struct drm_plane
*plane
;
1222 struct drm_plane_state
*old_plane_state
;
1225 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
1226 const struct drm_crtc_helper_funcs
*funcs
;
1228 funcs
= crtc
->helper_private
;
1230 if (!funcs
|| !funcs
->atomic_begin
)
1233 if (active_only
&& !crtc
->state
->active
)
1236 funcs
->atomic_begin(crtc
, old_crtc_state
);
1239 for_each_plane_in_state(old_state
, plane
, old_plane_state
, i
) {
1240 const struct drm_plane_helper_funcs
*funcs
;
1243 funcs
= plane
->helper_private
;
1248 disabling
= drm_atomic_plane_disabling(plane
, old_plane_state
);
1252 * Skip planes related to inactive CRTCs. If the plane
1253 * is enabled use the state of the current CRTC. If the
1254 * plane is being disabled use the state of the old
1255 * CRTC to avoid skipping planes being disabled on an
1258 if (!disabling
&& !plane_crtc_active(plane
->state
))
1260 if (disabling
&& !plane_crtc_active(old_plane_state
))
1265 * Special-case disabling the plane if drivers support it.
1267 if (disabling
&& funcs
->atomic_disable
)
1268 funcs
->atomic_disable(plane
, old_plane_state
);
1269 else if (plane
->state
->crtc
|| disabling
)
1270 funcs
->atomic_update(plane
, old_plane_state
);
1273 for_each_crtc_in_state(old_state
, crtc
, old_crtc_state
, i
) {
1274 const struct drm_crtc_helper_funcs
*funcs
;
1276 funcs
= crtc
->helper_private
;
1278 if (!funcs
|| !funcs
->atomic_flush
)
1281 if (active_only
&& !crtc
->state
->active
)
1284 funcs
->atomic_flush(crtc
, old_crtc_state
);
1287 EXPORT_SYMBOL(drm_atomic_helper_commit_planes
);
1290 * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc
1291 * @old_crtc_state: atomic state object with the old crtc state
1293 * This function commits the new plane state using the plane and atomic helper
1294 * functions for planes on the specific crtc. It assumes that the atomic state
1295 * has already been pushed into the relevant object state pointers, since this
1296 * step can no longer fail.
1298 * This function is useful when plane updates should be done crtc-by-crtc
1299 * instead of one global step like drm_atomic_helper_commit_planes() does.
1301 * This function can only be savely used when planes are not allowed to move
1302 * between different CRTCs because this function doesn't handle inter-CRTC
1303 * depencies. Callers need to ensure that either no such depencies exist,
1304 * resolve them through ordering of commit calls or through some other means.
1307 drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state
*old_crtc_state
)
1309 const struct drm_crtc_helper_funcs
*crtc_funcs
;
1310 struct drm_crtc
*crtc
= old_crtc_state
->crtc
;
1311 struct drm_atomic_state
*old_state
= old_crtc_state
->state
;
1312 struct drm_plane
*plane
;
1313 unsigned plane_mask
;
1315 plane_mask
= old_crtc_state
->plane_mask
;
1316 plane_mask
|= crtc
->state
->plane_mask
;
1318 crtc_funcs
= crtc
->helper_private
;
1319 if (crtc_funcs
&& crtc_funcs
->atomic_begin
)
1320 crtc_funcs
->atomic_begin(crtc
, old_crtc_state
);
1322 drm_for_each_plane_mask(plane
, crtc
->dev
, plane_mask
) {
1323 struct drm_plane_state
*old_plane_state
=
1324 drm_atomic_get_existing_plane_state(old_state
, plane
);
1325 const struct drm_plane_helper_funcs
*plane_funcs
;
1327 plane_funcs
= plane
->helper_private
;
1329 if (!old_plane_state
|| !plane_funcs
)
1332 WARN_ON(plane
->state
->crtc
&& plane
->state
->crtc
!= crtc
);
1334 if (drm_atomic_plane_disabling(plane
, old_plane_state
) &&
1335 plane_funcs
->atomic_disable
)
1336 plane_funcs
->atomic_disable(plane
, old_plane_state
);
1337 else if (plane
->state
->crtc
||
1338 drm_atomic_plane_disabling(plane
, old_plane_state
))
1339 plane_funcs
->atomic_update(plane
, old_plane_state
);
1342 if (crtc_funcs
&& crtc_funcs
->atomic_flush
)
1343 crtc_funcs
->atomic_flush(crtc
, old_crtc_state
);
1345 EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc
);
1348 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
1350 * @old_state: atomic state object with old state structures
1352 * This function cleans up plane state, specifically framebuffers, from the old
1353 * configuration. Hence the old configuration must be perserved in @old_state to
1354 * be able to call this function.
1356 * This function must also be called on the new state when the atomic update
1357 * fails at any point after calling drm_atomic_helper_prepare_planes().
1359 void drm_atomic_helper_cleanup_planes(struct drm_device
*dev
,
1360 struct drm_atomic_state
*old_state
)
1362 struct drm_plane
*plane
;
1363 struct drm_plane_state
*plane_state
;
1366 for_each_plane_in_state(old_state
, plane
, plane_state
, i
) {
1367 const struct drm_plane_helper_funcs
*funcs
;
1369 funcs
= plane
->helper_private
;
1371 if (funcs
->cleanup_fb
)
1372 funcs
->cleanup_fb(plane
, plane_state
);
1375 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes
);
1378 * drm_atomic_helper_swap_state - store atomic state into current sw state
1380 * @state: atomic state
1382 * This function stores the atomic state into the current state pointers in all
1383 * driver objects. It should be called after all failing steps have been done
1384 * and succeeded, but before the actual hardware state is committed.
1386 * For cleanup and error recovery the current state for all changed objects will
1387 * be swaped into @state.
1389 * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
1391 * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
1393 * 2. Do any other steps that might fail.
1395 * 3. Put the staged state into the current state pointers with this function.
1397 * 4. Actually commit the hardware state.
1399 * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3
1400 * contains the old state. Also do any other cleanup required with that state.
1402 void drm_atomic_helper_swap_state(struct drm_device
*dev
,
1403 struct drm_atomic_state
*state
)
1407 for (i
= 0; i
< dev
->mode_config
.num_connector
; i
++) {
1408 struct drm_connector
*connector
= state
->connectors
[i
];
1413 connector
->state
->state
= state
;
1414 swap(state
->connector_states
[i
], connector
->state
);
1415 connector
->state
->state
= NULL
;
1418 for (i
= 0; i
< dev
->mode_config
.num_crtc
; i
++) {
1419 struct drm_crtc
*crtc
= state
->crtcs
[i
];
1424 crtc
->state
->state
= state
;
1425 swap(state
->crtc_states
[i
], crtc
->state
);
1426 crtc
->state
->state
= NULL
;
1429 for (i
= 0; i
< dev
->mode_config
.num_total_plane
; i
++) {
1430 struct drm_plane
*plane
= state
->planes
[i
];
1435 plane
->state
->state
= state
;
1436 swap(state
->plane_states
[i
], plane
->state
);
1437 plane
->state
->state
= NULL
;
1440 EXPORT_SYMBOL(drm_atomic_helper_swap_state
);
1443 * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
1444 * @plane: plane object to update
1445 * @crtc: owning CRTC of owning plane
1446 * @fb: framebuffer to flip onto plane
1447 * @crtc_x: x offset of primary plane on crtc
1448 * @crtc_y: y offset of primary plane on crtc
1449 * @crtc_w: width of primary plane rectangle on crtc
1450 * @crtc_h: height of primary plane rectangle on crtc
1451 * @src_x: x offset of @fb for panning
1452 * @src_y: y offset of @fb for panning
1453 * @src_w: width of source rectangle in @fb
1454 * @src_h: height of source rectangle in @fb
1456 * Provides a default plane update handler using the atomic driver interface.
1459 * Zero on success, error code on failure
1461 int drm_atomic_helper_update_plane(struct drm_plane
*plane
,
1462 struct drm_crtc
*crtc
,
1463 struct drm_framebuffer
*fb
,
1464 int crtc_x
, int crtc_y
,
1465 unsigned int crtc_w
, unsigned int crtc_h
,
1466 uint32_t src_x
, uint32_t src_y
,
1467 uint32_t src_w
, uint32_t src_h
)
1469 struct drm_atomic_state
*state
;
1470 struct drm_plane_state
*plane_state
;
1473 state
= drm_atomic_state_alloc(plane
->dev
);
1477 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
1479 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1480 if (IS_ERR(plane_state
)) {
1481 ret
= PTR_ERR(plane_state
);
1485 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
1488 drm_atomic_set_fb_for_plane(plane_state
, fb
);
1489 plane_state
->crtc_x
= crtc_x
;
1490 plane_state
->crtc_y
= crtc_y
;
1491 plane_state
->crtc_h
= crtc_h
;
1492 plane_state
->crtc_w
= crtc_w
;
1493 plane_state
->src_x
= src_x
;
1494 plane_state
->src_y
= src_y
;
1495 plane_state
->src_h
= src_h
;
1496 plane_state
->src_w
= src_w
;
1498 if (plane
== crtc
->cursor
)
1499 state
->legacy_cursor_update
= true;
1501 ret
= drm_atomic_commit(state
);
1505 /* Driver takes ownership of state on successful commit. */
1508 if (ret
== -EDEADLK
)
1511 drm_atomic_state_free(state
);
1515 drm_atomic_state_clear(state
);
1516 drm_atomic_legacy_backoff(state
);
1519 * Someone might have exchanged the framebuffer while we dropped locks
1520 * in the backoff code. We need to fix up the fb refcount tracking the
1523 plane
->old_fb
= plane
->fb
;
1527 EXPORT_SYMBOL(drm_atomic_helper_update_plane
);
1530 * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
1531 * @plane: plane to disable
1533 * Provides a default plane disable handler using the atomic driver interface.
1536 * Zero on success, error code on failure
1538 int drm_atomic_helper_disable_plane(struct drm_plane
*plane
)
1540 struct drm_atomic_state
*state
;
1541 struct drm_plane_state
*plane_state
;
1545 * FIXME: Without plane->crtc set we can't get at the implicit legacy
1546 * acquire context. The real fix will be to wire the acquire ctx through
1547 * everywhere we need it, but meanwhile prevent chaos by just skipping
1548 * this noop. The critical case is the cursor ioctls which a) only grab
1549 * crtc/cursor-plane locks (so we need the crtc to get at the right
1550 * acquire context) and b) can try to disable the plane multiple times.
1555 state
= drm_atomic_state_alloc(plane
->dev
);
1559 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(plane
->crtc
);
1561 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1562 if (IS_ERR(plane_state
)) {
1563 ret
= PTR_ERR(plane_state
);
1567 if (plane_state
->crtc
&& (plane
== plane
->crtc
->cursor
))
1568 plane_state
->state
->legacy_cursor_update
= true;
1570 ret
= __drm_atomic_helper_disable_plane(plane
, plane_state
);
1574 ret
= drm_atomic_commit(state
);
1578 /* Driver takes ownership of state on successful commit. */
1581 if (ret
== -EDEADLK
)
1584 drm_atomic_state_free(state
);
1588 drm_atomic_state_clear(state
);
1589 drm_atomic_legacy_backoff(state
);
1592 * Someone might have exchanged the framebuffer while we dropped locks
1593 * in the backoff code. We need to fix up the fb refcount tracking the
1596 plane
->old_fb
= plane
->fb
;
1600 EXPORT_SYMBOL(drm_atomic_helper_disable_plane
);
1602 /* just used from fb-helper and atomic-helper: */
1603 int __drm_atomic_helper_disable_plane(struct drm_plane
*plane
,
1604 struct drm_plane_state
*plane_state
)
1608 ret
= drm_atomic_set_crtc_for_plane(plane_state
, NULL
);
1612 drm_atomic_set_fb_for_plane(plane_state
, NULL
);
1613 plane_state
->crtc_x
= 0;
1614 plane_state
->crtc_y
= 0;
1615 plane_state
->crtc_h
= 0;
1616 plane_state
->crtc_w
= 0;
1617 plane_state
->src_x
= 0;
1618 plane_state
->src_y
= 0;
1619 plane_state
->src_h
= 0;
1620 plane_state
->src_w
= 0;
1625 static int update_output_state(struct drm_atomic_state
*state
,
1626 struct drm_mode_set
*set
)
1628 struct drm_device
*dev
= set
->crtc
->dev
;
1629 struct drm_crtc
*crtc
;
1630 struct drm_crtc_state
*crtc_state
;
1631 struct drm_connector
*connector
;
1632 struct drm_connector_state
*conn_state
;
1635 ret
= drm_modeset_lock(&dev
->mode_config
.connection_mutex
,
1636 state
->acquire_ctx
);
1640 /* First grab all affected connector/crtc states. */
1641 for (i
= 0; i
< set
->num_connectors
; i
++) {
1642 conn_state
= drm_atomic_get_connector_state(state
,
1643 set
->connectors
[i
]);
1644 if (IS_ERR(conn_state
))
1645 return PTR_ERR(conn_state
);
1648 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1649 ret
= drm_atomic_add_affected_connectors(state
, crtc
);
1654 /* Then recompute connector->crtc links and crtc enabling state. */
1655 for_each_connector_in_state(state
, connector
, conn_state
, i
) {
1656 if (conn_state
->crtc
== set
->crtc
) {
1657 ret
= drm_atomic_set_crtc_for_connector(conn_state
,
1663 for (j
= 0; j
< set
->num_connectors
; j
++) {
1664 if (set
->connectors
[j
] == connector
) {
1665 ret
= drm_atomic_set_crtc_for_connector(conn_state
,
1674 for_each_crtc_in_state(state
, crtc
, crtc_state
, i
) {
1675 /* Don't update ->enable for the CRTC in the set_config request,
1676 * since a mismatch would indicate a bug in the upper layers.
1677 * The actual modeset code later on will catch any
1678 * inconsistencies here. */
1679 if (crtc
== set
->crtc
)
1682 if (!drm_atomic_connectors_for_crtc(state
, crtc
)) {
1683 ret
= drm_atomic_set_mode_prop_for_crtc(crtc_state
,
1688 crtc_state
->active
= false;
1696 * drm_atomic_helper_set_config - set a new config from userspace
1697 * @set: mode set configuration
1699 * Provides a default crtc set_config handler using the atomic driver interface.
1702 * Returns 0 on success, negative errno numbers on failure.
1704 int drm_atomic_helper_set_config(struct drm_mode_set
*set
)
1706 struct drm_atomic_state
*state
;
1707 struct drm_crtc
*crtc
= set
->crtc
;
1710 state
= drm_atomic_state_alloc(crtc
->dev
);
1714 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
1716 ret
= __drm_atomic_helper_set_config(set
, state
);
1720 ret
= drm_atomic_commit(state
);
1724 /* Driver takes ownership of state on successful commit. */
1727 if (ret
== -EDEADLK
)
1730 drm_atomic_state_free(state
);
1734 drm_atomic_state_clear(state
);
1735 drm_atomic_legacy_backoff(state
);
1738 * Someone might have exchanged the framebuffer while we dropped locks
1739 * in the backoff code. We need to fix up the fb refcount tracking the
1742 crtc
->primary
->old_fb
= crtc
->primary
->fb
;
1746 EXPORT_SYMBOL(drm_atomic_helper_set_config
);
1748 /* just used from fb-helper and atomic-helper: */
1749 int __drm_atomic_helper_set_config(struct drm_mode_set
*set
,
1750 struct drm_atomic_state
*state
)
1752 struct drm_crtc_state
*crtc_state
;
1753 struct drm_plane_state
*primary_state
;
1754 struct drm_crtc
*crtc
= set
->crtc
;
1755 int hdisplay
, vdisplay
;
1758 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1759 if (IS_ERR(crtc_state
))
1760 return PTR_ERR(crtc_state
);
1762 primary_state
= drm_atomic_get_plane_state(state
, crtc
->primary
);
1763 if (IS_ERR(primary_state
))
1764 return PTR_ERR(primary_state
);
1768 WARN_ON(set
->num_connectors
);
1770 ret
= drm_atomic_set_mode_for_crtc(crtc_state
, NULL
);
1774 crtc_state
->active
= false;
1776 ret
= drm_atomic_set_crtc_for_plane(primary_state
, NULL
);
1780 drm_atomic_set_fb_for_plane(primary_state
, NULL
);
1786 WARN_ON(!set
->num_connectors
);
1788 ret
= drm_atomic_set_mode_for_crtc(crtc_state
, set
->mode
);
1792 crtc_state
->active
= true;
1794 ret
= drm_atomic_set_crtc_for_plane(primary_state
, crtc
);
1798 drm_crtc_get_hv_timing(set
->mode
, &hdisplay
, &vdisplay
);
1800 drm_atomic_set_fb_for_plane(primary_state
, set
->fb
);
1801 primary_state
->crtc_x
= 0;
1802 primary_state
->crtc_y
= 0;
1803 primary_state
->crtc_h
= vdisplay
;
1804 primary_state
->crtc_w
= hdisplay
;
1805 primary_state
->src_x
= set
->x
<< 16;
1806 primary_state
->src_y
= set
->y
<< 16;
1807 if (primary_state
->rotation
& (BIT(DRM_ROTATE_90
) | BIT(DRM_ROTATE_270
))) {
1808 primary_state
->src_h
= hdisplay
<< 16;
1809 primary_state
->src_w
= vdisplay
<< 16;
1811 primary_state
->src_h
= vdisplay
<< 16;
1812 primary_state
->src_w
= hdisplay
<< 16;
1816 ret
= update_output_state(state
, set
);
1824 * drm_atomic_helper_crtc_set_property - helper for crtc properties
1826 * @property: DRM property
1827 * @val: value of property
1829 * Provides a default crtc set_property handler using the atomic driver
1833 * Zero on success, error code on failure
1836 drm_atomic_helper_crtc_set_property(struct drm_crtc
*crtc
,
1837 struct drm_property
*property
,
1840 struct drm_atomic_state
*state
;
1841 struct drm_crtc_state
*crtc_state
;
1844 state
= drm_atomic_state_alloc(crtc
->dev
);
1848 /* ->set_property is always called with all locks held. */
1849 state
->acquire_ctx
= crtc
->dev
->mode_config
.acquire_ctx
;
1851 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
1852 if (IS_ERR(crtc_state
)) {
1853 ret
= PTR_ERR(crtc_state
);
1857 ret
= drm_atomic_crtc_set_property(crtc
, crtc_state
,
1862 ret
= drm_atomic_commit(state
);
1866 /* Driver takes ownership of state on successful commit. */
1869 if (ret
== -EDEADLK
)
1872 drm_atomic_state_free(state
);
1876 drm_atomic_state_clear(state
);
1877 drm_atomic_legacy_backoff(state
);
1881 EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property
);
1884 * drm_atomic_helper_plane_set_property - helper for plane properties
1886 * @property: DRM property
1887 * @val: value of property
1889 * Provides a default plane set_property handler using the atomic driver
1893 * Zero on success, error code on failure
1896 drm_atomic_helper_plane_set_property(struct drm_plane
*plane
,
1897 struct drm_property
*property
,
1900 struct drm_atomic_state
*state
;
1901 struct drm_plane_state
*plane_state
;
1904 state
= drm_atomic_state_alloc(plane
->dev
);
1908 /* ->set_property is always called with all locks held. */
1909 state
->acquire_ctx
= plane
->dev
->mode_config
.acquire_ctx
;
1911 plane_state
= drm_atomic_get_plane_state(state
, plane
);
1912 if (IS_ERR(plane_state
)) {
1913 ret
= PTR_ERR(plane_state
);
1917 ret
= drm_atomic_plane_set_property(plane
, plane_state
,
1922 ret
= drm_atomic_commit(state
);
1926 /* Driver takes ownership of state on successful commit. */
1929 if (ret
== -EDEADLK
)
1932 drm_atomic_state_free(state
);
1936 drm_atomic_state_clear(state
);
1937 drm_atomic_legacy_backoff(state
);
1941 EXPORT_SYMBOL(drm_atomic_helper_plane_set_property
);
1944 * drm_atomic_helper_connector_set_property - helper for connector properties
1945 * @connector: DRM connector
1946 * @property: DRM property
1947 * @val: value of property
1949 * Provides a default connector set_property handler using the atomic driver
1953 * Zero on success, error code on failure
1956 drm_atomic_helper_connector_set_property(struct drm_connector
*connector
,
1957 struct drm_property
*property
,
1960 struct drm_atomic_state
*state
;
1961 struct drm_connector_state
*connector_state
;
1964 state
= drm_atomic_state_alloc(connector
->dev
);
1968 /* ->set_property is always called with all locks held. */
1969 state
->acquire_ctx
= connector
->dev
->mode_config
.acquire_ctx
;
1971 connector_state
= drm_atomic_get_connector_state(state
, connector
);
1972 if (IS_ERR(connector_state
)) {
1973 ret
= PTR_ERR(connector_state
);
1977 ret
= drm_atomic_connector_set_property(connector
, connector_state
,
1982 ret
= drm_atomic_commit(state
);
1986 /* Driver takes ownership of state on successful commit. */
1989 if (ret
== -EDEADLK
)
1992 drm_atomic_state_free(state
);
1996 drm_atomic_state_clear(state
);
1997 drm_atomic_legacy_backoff(state
);
2001 EXPORT_SYMBOL(drm_atomic_helper_connector_set_property
);
2004 * drm_atomic_helper_page_flip - execute a legacy page flip
2006 * @fb: DRM framebuffer
2007 * @event: optional DRM event to signal upon completion
2008 * @flags: flip flags for non-vblank sync'ed updates
2010 * Provides a default page flip implementation using the atomic driver interface.
2012 * Note that for now so called async page flips (i.e. updates which are not
2013 * synchronized to vblank) are not supported, since the atomic interfaces have
2014 * no provisions for this yet.
2017 * Returns 0 on success, negative errno numbers on failure.
2019 int drm_atomic_helper_page_flip(struct drm_crtc
*crtc
,
2020 struct drm_framebuffer
*fb
,
2021 struct drm_pending_vblank_event
*event
,
2024 struct drm_plane
*plane
= crtc
->primary
;
2025 struct drm_atomic_state
*state
;
2026 struct drm_plane_state
*plane_state
;
2027 struct drm_crtc_state
*crtc_state
;
2030 if (flags
& DRM_MODE_PAGE_FLIP_ASYNC
)
2033 state
= drm_atomic_state_alloc(plane
->dev
);
2037 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
2039 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2040 if (IS_ERR(crtc_state
)) {
2041 ret
= PTR_ERR(crtc_state
);
2044 crtc_state
->event
= event
;
2046 plane_state
= drm_atomic_get_plane_state(state
, plane
);
2047 if (IS_ERR(plane_state
)) {
2048 ret
= PTR_ERR(plane_state
);
2052 ret
= drm_atomic_set_crtc_for_plane(plane_state
, crtc
);
2055 drm_atomic_set_fb_for_plane(plane_state
, fb
);
2057 ret
= drm_atomic_async_commit(state
);
2061 /* Driver takes ownership of state on successful async commit. */
2064 if (ret
== -EDEADLK
)
2067 drm_atomic_state_free(state
);
2071 drm_atomic_state_clear(state
);
2072 drm_atomic_legacy_backoff(state
);
2075 * Someone might have exchanged the framebuffer while we dropped locks
2076 * in the backoff code. We need to fix up the fb refcount tracking the
2079 plane
->old_fb
= plane
->fb
;
2083 EXPORT_SYMBOL(drm_atomic_helper_page_flip
);
2086 * drm_atomic_helper_connector_dpms() - connector dpms helper implementation
2087 * @connector: affected connector
2090 * This is the main helper function provided by the atomic helper framework for
2091 * implementing the legacy DPMS connector interface. It computes the new desired
2092 * ->active state for the corresponding CRTC (if the connector is enabled) and
2096 * Returns 0 on success, negative errno numbers on failure.
2098 int drm_atomic_helper_connector_dpms(struct drm_connector
*connector
,
2101 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
2102 struct drm_atomic_state
*state
;
2103 struct drm_crtc_state
*crtc_state
;
2104 struct drm_crtc
*crtc
;
2105 struct drm_connector
*tmp_connector
;
2107 bool active
= false;
2108 int old_mode
= connector
->dpms
;
2110 if (mode
!= DRM_MODE_DPMS_ON
)
2111 mode
= DRM_MODE_DPMS_OFF
;
2113 connector
->dpms
= mode
;
2114 crtc
= connector
->state
->crtc
;
2119 state
= drm_atomic_state_alloc(connector
->dev
);
2123 state
->acquire_ctx
= drm_modeset_legacy_acquire_ctx(crtc
);
2125 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2126 if (IS_ERR(crtc_state
)) {
2127 ret
= PTR_ERR(crtc_state
);
2131 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
2133 drm_for_each_connector(tmp_connector
, connector
->dev
) {
2134 if (tmp_connector
->state
->crtc
!= crtc
)
2137 if (tmp_connector
->dpms
== DRM_MODE_DPMS_ON
) {
2142 crtc_state
->active
= active
;
2144 ret
= drm_atomic_commit(state
);
2148 /* Driver takes ownership of state on successful commit. */
2151 if (ret
== -EDEADLK
)
2154 connector
->dpms
= old_mode
;
2155 drm_atomic_state_free(state
);
2159 drm_atomic_state_clear(state
);
2160 drm_atomic_legacy_backoff(state
);
2164 EXPORT_SYMBOL(drm_atomic_helper_connector_dpms
);
2167 * DOC: atomic state reset and initialization
2169 * Both the drm core and the atomic helpers assume that there is always the full
2170 * and correct atomic software state for all connectors, CRTCs and planes
2171 * available. Which is a bit a problem on driver load and also after system
2172 * suspend. One way to solve this is to have a hardware state read-out
2173 * infrastructure which reconstructs the full software state (e.g. the i915
2176 * The simpler solution is to just reset the software state to everything off,
2177 * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
2178 * the atomic helpers provide default reset implementations for all hooks.
2182 * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs
2185 * Resets the atomic state for @crtc by freeing the state pointer (which might
2186 * be NULL, e.g. at driver load time) and allocating a new empty state object.
2188 void drm_atomic_helper_crtc_reset(struct drm_crtc
*crtc
)
2190 if (crtc
->state
&& crtc
->state
->mode_blob
)
2191 drm_property_unreference_blob(crtc
->state
->mode_blob
);
2193 crtc
->state
= kzalloc(sizeof(*crtc
->state
), GFP_KERNEL
);
2196 crtc
->state
->crtc
= crtc
;
2198 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset
);
2201 * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
2202 * @crtc: CRTC object
2203 * @state: atomic CRTC state
2205 * Copies atomic state from a CRTC's current state and resets inferred values.
2206 * This is useful for drivers that subclass the CRTC state.
2208 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc
*crtc
,
2209 struct drm_crtc_state
*state
)
2211 memcpy(state
, crtc
->state
, sizeof(*state
));
2213 if (state
->mode_blob
)
2214 drm_property_reference_blob(state
->mode_blob
);
2215 state
->mode_changed
= false;
2216 state
->active_changed
= false;
2217 state
->planes_changed
= false;
2218 state
->connectors_changed
= false;
2219 state
->event
= NULL
;
2221 EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state
);
2224 * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
2227 * Default CRTC state duplicate hook for drivers which don't have their own
2228 * subclassed CRTC state structure.
2230 struct drm_crtc_state
*
2231 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc
*crtc
)
2233 struct drm_crtc_state
*state
;
2235 if (WARN_ON(!crtc
->state
))
2238 state
= kmalloc(sizeof(*state
), M_DRM
, M_WAITOK
);
2240 __drm_atomic_helper_crtc_duplicate_state(crtc
, state
);
2244 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state
);
2247 * __drm_atomic_helper_crtc_destroy_state - release CRTC state
2248 * @crtc: CRTC object
2249 * @state: CRTC state object to release
2251 * Releases all resources stored in the CRTC state without actually freeing
2252 * the memory of the CRTC state. This is useful for drivers that subclass the
2255 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc
*crtc
,
2256 struct drm_crtc_state
*state
)
2258 if (state
->mode_blob
)
2259 drm_property_unreference_blob(state
->mode_blob
);
2261 EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state
);
2264 * drm_atomic_helper_crtc_destroy_state - default state destroy hook
2266 * @state: CRTC state object to release
2268 * Default CRTC state destroy hook for drivers which don't have their own
2269 * subclassed CRTC state structure.
2271 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc
*crtc
,
2272 struct drm_crtc_state
*state
)
2274 __drm_atomic_helper_crtc_destroy_state(crtc
, state
);
2277 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state
);
2280 * drm_atomic_helper_plane_reset - default ->reset hook for planes
2283 * Resets the atomic state for @plane by freeing the state pointer (which might
2284 * be NULL, e.g. at driver load time) and allocating a new empty state object.
2286 void drm_atomic_helper_plane_reset(struct drm_plane
*plane
)
2288 if (plane
->state
&& plane
->state
->fb
)
2289 drm_framebuffer_unreference(plane
->state
->fb
);
2291 kfree(plane
->state
);
2292 plane
->state
= kzalloc(sizeof(*plane
->state
), GFP_KERNEL
);
2295 plane
->state
->plane
= plane
;
2297 EXPORT_SYMBOL(drm_atomic_helper_plane_reset
);
2300 * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
2301 * @plane: plane object
2302 * @state: atomic plane state
2304 * Copies atomic state from a plane's current state. This is useful for
2305 * drivers that subclass the plane state.
2307 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane
*plane
,
2308 struct drm_plane_state
*state
)
2310 memcpy(state
, plane
->state
, sizeof(*state
));
2313 drm_framebuffer_reference(state
->fb
);
2315 EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state
);
2318 * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
2321 * Default plane state duplicate hook for drivers which don't have their own
2322 * subclassed plane state structure.
2324 struct drm_plane_state
*
2325 drm_atomic_helper_plane_duplicate_state(struct drm_plane
*plane
)
2327 struct drm_plane_state
*state
;
2329 if (WARN_ON(!plane
->state
))
2332 state
= kmalloc(sizeof(*state
), M_DRM
, M_WAITOK
);
2334 __drm_atomic_helper_plane_duplicate_state(plane
, state
);
2338 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state
);
2341 * __drm_atomic_helper_plane_destroy_state - release plane state
2342 * @plane: plane object
2343 * @state: plane state object to release
2345 * Releases all resources stored in the plane state without actually freeing
2346 * the memory of the plane state. This is useful for drivers that subclass the
2349 void __drm_atomic_helper_plane_destroy_state(struct drm_plane
*plane
,
2350 struct drm_plane_state
*state
)
2353 drm_framebuffer_unreference(state
->fb
);
2355 EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state
);
2358 * drm_atomic_helper_plane_destroy_state - default state destroy hook
2360 * @state: plane state object to release
2362 * Default plane state destroy hook for drivers which don't have their own
2363 * subclassed plane state structure.
2365 void drm_atomic_helper_plane_destroy_state(struct drm_plane
*plane
,
2366 struct drm_plane_state
*state
)
2368 __drm_atomic_helper_plane_destroy_state(plane
, state
);
2371 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state
);
2374 * drm_atomic_helper_connector_reset - default ->reset hook for connectors
2375 * @connector: drm connector
2377 * Resets the atomic state for @connector by freeing the state pointer (which
2378 * might be NULL, e.g. at driver load time) and allocating a new empty state
2381 void drm_atomic_helper_connector_reset(struct drm_connector
*connector
)
2383 kfree(connector
->state
);
2384 connector
->state
= kzalloc(sizeof(*connector
->state
), GFP_KERNEL
);
2386 if (connector
->state
)
2387 connector
->state
->connector
= connector
;
2389 EXPORT_SYMBOL(drm_atomic_helper_connector_reset
);
2392 * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
2393 * @connector: connector object
2394 * @state: atomic connector state
2396 * Copies atomic state from a connector's current state. This is useful for
2397 * drivers that subclass the connector state.
2400 __drm_atomic_helper_connector_duplicate_state(struct drm_connector
*connector
,
2401 struct drm_connector_state
*state
)
2403 memcpy(state
, connector
->state
, sizeof(*state
));
2405 EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state
);
2408 * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
2409 * @connector: drm connector
2411 * Default connector state duplicate hook for drivers which don't have their own
2412 * subclassed connector state structure.
2414 struct drm_connector_state
*
2415 drm_atomic_helper_connector_duplicate_state(struct drm_connector
*connector
)
2417 struct drm_connector_state
*state
;
2419 if (WARN_ON(!connector
->state
))
2422 state
= kmalloc(sizeof(*state
), M_DRM
, M_WAITOK
);
2424 __drm_atomic_helper_connector_duplicate_state(connector
, state
);
2428 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state
);
2431 * drm_atomic_helper_duplicate_state - duplicate an atomic state object
2433 * @ctx: lock acquisition context
2435 * Makes a copy of the current atomic state by looping over all objects and
2436 * duplicating their respective states.
2438 * Note that this treats atomic state as persistent between save and restore.
2439 * Drivers must make sure that this is possible and won't result in confusion
2440 * or erroneous behaviour.
2442 * Note that if callers haven't already acquired all modeset locks this might
2443 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
2446 * A pointer to the copy of the atomic state object on success or an
2447 * ERR_PTR()-encoded error code on failure.
2449 struct drm_atomic_state
*
2450 drm_atomic_helper_duplicate_state(struct drm_device
*dev
,
2451 struct drm_modeset_acquire_ctx
*ctx
)
2453 struct drm_atomic_state
*state
;
2454 struct drm_connector
*conn
;
2455 struct drm_plane
*plane
;
2456 struct drm_crtc
*crtc
;
2459 state
= drm_atomic_state_alloc(dev
);
2461 return ERR_PTR(-ENOMEM
);
2463 state
->acquire_ctx
= ctx
;
2465 drm_for_each_crtc(crtc
, dev
) {
2466 struct drm_crtc_state
*crtc_state
;
2468 crtc_state
= drm_atomic_get_crtc_state(state
, crtc
);
2469 if (IS_ERR(crtc_state
)) {
2470 err
= PTR_ERR(crtc_state
);
2475 drm_for_each_plane(plane
, dev
) {
2476 struct drm_plane_state
*plane_state
;
2478 plane_state
= drm_atomic_get_plane_state(state
, plane
);
2479 if (IS_ERR(plane_state
)) {
2480 err
= PTR_ERR(plane_state
);
2485 drm_for_each_connector(conn
, dev
) {
2486 struct drm_connector_state
*conn_state
;
2488 conn_state
= drm_atomic_get_connector_state(state
, conn
);
2489 if (IS_ERR(conn_state
)) {
2490 err
= PTR_ERR(conn_state
);
2495 /* clear the acquire context so that it isn't accidentally reused */
2496 state
->acquire_ctx
= NULL
;
2500 drm_atomic_state_free(state
);
2501 state
= ERR_PTR(err
);
2506 EXPORT_SYMBOL(drm_atomic_helper_duplicate_state
);
2509 * __drm_atomic_helper_connector_destroy_state - release connector state
2510 * @connector: connector object
2511 * @state: connector state object to release
2513 * Releases all resources stored in the connector state without actually
2514 * freeing the memory of the connector state. This is useful for drivers that
2515 * subclass the connector state.
2518 __drm_atomic_helper_connector_destroy_state(struct drm_connector
*connector
,
2519 struct drm_connector_state
*state
)
2522 * This is currently a placeholder so that drivers that subclass the
2523 * state will automatically do the right thing if code is ever added
2527 EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state
);
2530 * drm_atomic_helper_connector_destroy_state - default state destroy hook
2531 * @connector: drm connector
2532 * @state: connector state object to release
2534 * Default connector state destroy hook for drivers which don't have their own
2535 * subclassed connector state structure.
2537 void drm_atomic_helper_connector_destroy_state(struct drm_connector
*connector
,
2538 struct drm_connector_state
*state
)
2540 __drm_atomic_helper_connector_destroy_state(connector
, state
);
2543 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state
);