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_internal.h"
40 * This helper library provides implementations of check and commit functions on
41 * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
42 * also provides convenience implementations for the atomic state handling
43 * callbacks for drivers which don't need to subclass the drm core structures to
44 * add their own additional internal state.
46 * This library also provides default implementations for the check callback in
47 * drm_atomic_helper_check() and for the commit callback with
48 * drm_atomic_helper_commit(). But the individual stages and callbacks are
49 * exposed to allow drivers to mix and match and e.g. use the plane helpers only
50 * together with a driver private modeset implementation.
52 * This library also provides implementations for all the legacy driver
53 * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
54 * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the
55 * various functions to implement set_property callbacks. New drivers must not
56 * implement these functions themselves but must use the provided helpers.
58 * The atomic helper uses the same function table structures as all other
59 * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs,
60 * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It
61 * also shares the struct &drm_plane_helper_funcs function table with the plane
65 drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
66 struct drm_plane_state *plane_state,
67 struct drm_plane *plane)
69 struct drm_crtc_state *crtc_state;
71 if (plane->state->crtc) {
72 crtc_state = drm_atomic_get_existing_crtc_state(state,
75 if (WARN_ON(!crtc_state))
78 crtc_state->planes_changed = true;
81 if (plane_state->crtc) {
82 crtc_state = drm_atomic_get_existing_crtc_state(state,
85 if (WARN_ON(!crtc_state))
88 crtc_state->planes_changed = true;
92 static int handle_conflicting_encoders(struct drm_atomic_state *state,
93 bool disable_conflicting_encoders)
95 struct drm_connector_state *conn_state;
96 struct drm_connector *connector;
97 struct drm_connector_list_iter conn_iter;
98 struct drm_encoder *encoder;
99 unsigned encoder_mask = 0;
103 * First loop, find all newly assigned encoders from the connectors
104 * part of the state. If the same encoder is assigned to multiple
105 * connectors bail out.
107 for_each_connector_in_state(state, connector, conn_state, i) {
108 const struct drm_connector_helper_funcs *funcs = connector->helper_private;
109 struct drm_encoder *new_encoder;
111 if (!conn_state->crtc)
114 if (funcs->atomic_best_encoder)
115 new_encoder = funcs->atomic_best_encoder(connector, conn_state);
116 else if (funcs->best_encoder)
117 new_encoder = funcs->best_encoder(connector);
119 new_encoder = drm_atomic_helper_best_encoder(connector);
122 if (encoder_mask & (1 << drm_encoder_index(new_encoder))) {
123 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n",
124 new_encoder->base.id, new_encoder->name,
125 connector->base.id, connector->name);
130 encoder_mask |= 1 << drm_encoder_index(new_encoder);
138 * Second loop, iterate over all connectors not part of the state.
140 * If a conflicting encoder is found and disable_conflicting_encoders
141 * is not set, an error is returned. Userspace can provide a solution
142 * through the atomic ioctl.
144 * If the flag is set conflicting connectors are removed from the crtc
145 * and the crtc is disabled if no encoder is left. This preserves
146 * compatibility with the legacy set_config behavior.
148 drm_connector_list_iter_get(state->dev, &conn_iter);
149 drm_for_each_connector_iter(connector, &conn_iter) {
150 struct drm_crtc_state *crtc_state;
152 if (drm_atomic_get_existing_connector_state(state, connector))
155 encoder = connector->state->best_encoder;
156 if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder))))
159 if (!disable_conflicting_encoders) {
160 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n",
161 encoder->base.id, encoder->name,
162 connector->state->crtc->base.id,
163 connector->state->crtc->name,
164 connector->base.id, connector->name);
169 conn_state = drm_atomic_get_connector_state(state, connector);
170 if (IS_ERR(conn_state)) {
171 ret = PTR_ERR(conn_state);
175 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n",
176 encoder->base.id, encoder->name,
177 conn_state->crtc->base.id, conn_state->crtc->name,
178 connector->base.id, connector->name);
180 crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc);
182 ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
186 if (!crtc_state->connector_mask) {
187 ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
192 crtc_state->active = false;
196 drm_connector_list_iter_put(&conn_iter);
202 set_best_encoder(struct drm_atomic_state *state,
203 struct drm_connector_state *conn_state,
204 struct drm_encoder *encoder)
206 struct drm_crtc_state *crtc_state;
207 struct drm_crtc *crtc;
209 if (conn_state->best_encoder) {
210 /* Unset the encoder_mask in the old crtc state. */
211 crtc = conn_state->connector->state->crtc;
213 /* A NULL crtc is an error here because we should have
214 * duplicated a NULL best_encoder when crtc was NULL.
215 * As an exception restoring duplicated atomic state
216 * during resume is allowed, so don't warn when
217 * best_encoder is equal to encoder we intend to set.
219 WARN_ON(!crtc && encoder != conn_state->best_encoder);
221 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
223 crtc_state->encoder_mask &=
224 ~(1 << drm_encoder_index(conn_state->best_encoder));
229 crtc = conn_state->crtc;
232 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
234 crtc_state->encoder_mask |=
235 1 << drm_encoder_index(encoder);
239 conn_state->best_encoder = encoder;
243 steal_encoder(struct drm_atomic_state *state,
244 struct drm_encoder *encoder)
246 struct drm_crtc_state *crtc_state;
247 struct drm_connector *connector;
248 struct drm_connector_state *connector_state;
251 for_each_connector_in_state(state, connector, connector_state, i) {
252 struct drm_crtc *encoder_crtc;
254 if (connector_state->best_encoder != encoder)
257 encoder_crtc = connector->state->crtc;
259 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
260 encoder->base.id, encoder->name,
261 encoder_crtc->base.id, encoder_crtc->name);
263 set_best_encoder(state, connector_state, NULL);
265 crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc);
266 crtc_state->connectors_changed = true;
273 update_connector_routing(struct drm_atomic_state *state,
274 struct drm_connector *connector,
275 struct drm_connector_state *connector_state)
277 const struct drm_connector_helper_funcs *funcs;
278 struct drm_encoder *new_encoder;
279 struct drm_crtc_state *crtc_state;
281 DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n",
285 if (connector->state->crtc != connector_state->crtc) {
286 if (connector->state->crtc) {
287 crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc);
288 crtc_state->connectors_changed = true;
291 if (connector_state->crtc) {
292 crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc);
293 crtc_state->connectors_changed = true;
297 if (!connector_state->crtc) {
298 DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
302 set_best_encoder(state, connector_state, NULL);
307 funcs = connector->helper_private;
309 if (funcs->atomic_best_encoder)
310 new_encoder = funcs->atomic_best_encoder(connector,
312 else if (funcs->best_encoder)
313 new_encoder = funcs->best_encoder(connector);
315 new_encoder = drm_atomic_helper_best_encoder(connector);
318 DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
324 if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) {
325 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n",
326 new_encoder->base.id,
328 connector_state->crtc->base.id);
332 if (new_encoder == connector_state->best_encoder) {
333 set_best_encoder(state, connector_state, new_encoder);
335 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
338 new_encoder->base.id,
340 connector_state->crtc->base.id,
341 connector_state->crtc->name);
346 steal_encoder(state, new_encoder);
348 set_best_encoder(state, connector_state, new_encoder);
350 crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc);
351 crtc_state->connectors_changed = true;
353 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
356 new_encoder->base.id,
358 connector_state->crtc->base.id,
359 connector_state->crtc->name);
365 mode_fixup(struct drm_atomic_state *state)
367 struct drm_crtc *crtc;
368 struct drm_crtc_state *crtc_state;
369 struct drm_connector *connector;
370 struct drm_connector_state *conn_state;
374 for_each_crtc_in_state(state, crtc, crtc_state, i) {
375 if (!crtc_state->mode_changed &&
376 !crtc_state->connectors_changed)
379 drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
382 for_each_connector_in_state(state, connector, conn_state, i) {
383 const struct drm_encoder_helper_funcs *funcs;
384 struct drm_encoder *encoder;
386 WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc);
388 if (!conn_state->crtc || !conn_state->best_encoder)
391 crtc_state = drm_atomic_get_existing_crtc_state(state,
395 * Each encoder has at most one connector (since we always steal
396 * it away), so we won't call ->mode_fixup twice.
398 encoder = conn_state->best_encoder;
399 funcs = encoder->helper_private;
401 ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode,
402 &crtc_state->adjusted_mode);
404 DRM_DEBUG_ATOMIC("Bridge fixup failed\n");
408 if (funcs && funcs->atomic_check) {
409 ret = funcs->atomic_check(encoder, crtc_state,
412 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n",
413 encoder->base.id, encoder->name);
416 } else if (funcs && funcs->mode_fixup) {
417 ret = funcs->mode_fixup(encoder, &crtc_state->mode,
418 &crtc_state->adjusted_mode);
420 DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n",
421 encoder->base.id, encoder->name);
427 for_each_crtc_in_state(state, crtc, crtc_state, i) {
428 const struct drm_crtc_helper_funcs *funcs;
430 if (!crtc_state->enable)
433 if (!crtc_state->mode_changed &&
434 !crtc_state->connectors_changed)
437 funcs = crtc->helper_private;
438 if (!funcs->mode_fixup)
441 ret = funcs->mode_fixup(crtc, &crtc_state->mode,
442 &crtc_state->adjusted_mode);
444 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n",
445 crtc->base.id, crtc->name);
454 * drm_atomic_helper_check_modeset - validate state object for modeset changes
456 * @state: the driver state object
458 * Check the state object to see if the requested state is physically possible.
459 * This does all the crtc and connector related computations for an atomic
460 * update and adds any additional connectors needed for full modesets and calls
461 * down into ->mode_fixup functions of the driver backend.
463 * crtc_state->mode_changed is set when the input mode is changed.
464 * crtc_state->connectors_changed is set when a connector is added or
465 * removed from the crtc.
466 * crtc_state->active_changed is set when crtc_state->active changes,
467 * which is used for dpms.
468 * See also: drm_atomic_crtc_needs_modeset()
472 * Drivers which set ->mode_changed (e.g. in their ->atomic_check hooks if a
473 * plane update can't be done without a full modeset) _must_ call this function
474 * afterwards after that change. It is permitted to call this function multiple
475 * times for the same update, e.g. when the ->atomic_check functions depend upon
476 * the adjusted dotclock for fifo space allocation and watermark computation.
479 * Zero for success or -errno
482 drm_atomic_helper_check_modeset(struct drm_device *dev,
483 struct drm_atomic_state *state)
485 struct drm_crtc *crtc;
486 struct drm_crtc_state *crtc_state;
487 struct drm_connector *connector;
488 struct drm_connector_state *connector_state;
491 for_each_crtc_in_state(state, crtc, crtc_state, i) {
492 if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
493 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
494 crtc->base.id, crtc->name);
495 crtc_state->mode_changed = true;
498 if (crtc->state->enable != crtc_state->enable) {
499 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n",
500 crtc->base.id, crtc->name);
503 * For clarity this assignment is done here, but
504 * enable == 0 is only true when there are no
505 * connectors and a NULL mode.
507 * The other way around is true as well. enable != 0
508 * iff connectors are attached and a mode is set.
510 crtc_state->mode_changed = true;
511 crtc_state->connectors_changed = true;
515 ret = handle_conflicting_encoders(state, state->legacy_set_config);
519 for_each_connector_in_state(state, connector, connector_state, i) {
521 * This only sets crtc->connectors_changed for routing changes,
522 * drivers must set crtc->connectors_changed themselves when
523 * connector properties need to be updated.
525 ret = update_connector_routing(state, connector,
532 * After all the routing has been prepared we need to add in any
533 * connector which is itself unchanged, but who's crtc changes it's
534 * configuration. This must be done before calling mode_fixup in case a
535 * crtc only changed its mode but has the same set of connectors.
537 for_each_crtc_in_state(state, crtc, crtc_state, i) {
538 bool has_connectors =
539 !!crtc_state->connector_mask;
542 * We must set ->active_changed after walking connectors for
543 * otherwise an update that only changes active would result in
544 * a full modeset because update_connector_routing force that.
546 if (crtc->state->active != crtc_state->active) {
547 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
548 crtc->base.id, crtc->name);
549 crtc_state->active_changed = true;
552 if (!drm_atomic_crtc_needs_modeset(crtc_state))
555 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
556 crtc->base.id, crtc->name,
557 crtc_state->enable ? 'y' : 'n',
558 crtc_state->active ? 'y' : 'n');
560 ret = drm_atomic_add_affected_connectors(state, crtc);
564 ret = drm_atomic_add_affected_planes(state, crtc);
568 if (crtc_state->enable != has_connectors) {
569 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
570 crtc->base.id, crtc->name);
576 return mode_fixup(state);
578 EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
581 * drm_atomic_helper_check_planes - validate state object for planes changes
583 * @state: the driver state object
585 * Check the state object to see if the requested state is physically possible.
586 * This does all the plane update related checks using by calling into the
587 * ->atomic_check hooks provided by the driver.
589 * It also sets crtc_state->planes_changed to indicate that a crtc has
593 * Zero for success or -errno
596 drm_atomic_helper_check_planes(struct drm_device *dev,
597 struct drm_atomic_state *state)
599 struct drm_crtc *crtc;
600 struct drm_crtc_state *crtc_state;
601 struct drm_plane *plane;
602 struct drm_plane_state *plane_state;
605 for_each_plane_in_state(state, plane, plane_state, i) {
606 const struct drm_plane_helper_funcs *funcs;
608 funcs = plane->helper_private;
610 drm_atomic_helper_plane_changed(state, plane_state, plane);
612 if (!funcs || !funcs->atomic_check)
615 ret = funcs->atomic_check(plane, plane_state);
617 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n",
618 plane->base.id, plane->name);
623 for_each_crtc_in_state(state, crtc, crtc_state, i) {
624 const struct drm_crtc_helper_funcs *funcs;
626 funcs = crtc->helper_private;
628 if (!funcs || !funcs->atomic_check)
631 ret = funcs->atomic_check(crtc, crtc_state);
633 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n",
634 crtc->base.id, crtc->name);
641 EXPORT_SYMBOL(drm_atomic_helper_check_planes);
644 * drm_atomic_helper_check - validate state object
646 * @state: the driver state object
648 * Check the state object to see if the requested state is physically possible.
649 * Only crtcs and planes have check callbacks, so for any additional (global)
650 * checking that a driver needs it can simply wrap that around this function.
651 * Drivers without such needs can directly use this as their ->atomic_check()
654 * This just wraps the two parts of the state checking for planes and modeset
655 * state in the default order: First it calls drm_atomic_helper_check_modeset()
656 * and then drm_atomic_helper_check_planes(). The assumption is that the
657 * ->atomic_check functions depend upon an updated adjusted_mode.clock to
658 * e.g. properly compute watermarks.
661 * Zero for success or -errno
663 int drm_atomic_helper_check(struct drm_device *dev,
664 struct drm_atomic_state *state)
668 ret = drm_atomic_helper_check_modeset(dev, state);
672 ret = drm_atomic_helper_check_planes(dev, state);
678 EXPORT_SYMBOL(drm_atomic_helper_check);
681 disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
683 struct drm_connector *connector;
684 struct drm_connector_state *old_conn_state;
685 struct drm_crtc *crtc;
686 struct drm_crtc_state *old_crtc_state;
689 for_each_connector_in_state(old_state, connector, old_conn_state, i) {
690 const struct drm_encoder_helper_funcs *funcs;
691 struct drm_encoder *encoder;
693 /* Shut down everything that's in the changeset and currently
694 * still on. So need to check the old, saved state. */
695 if (!old_conn_state->crtc)
698 old_crtc_state = drm_atomic_get_existing_crtc_state(old_state,
699 old_conn_state->crtc);
701 if (!old_crtc_state->active ||
702 !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
705 encoder = old_conn_state->best_encoder;
707 /* We shouldn't get this far if we didn't previously have
708 * an encoder.. but WARN_ON() rather than explode.
710 if (WARN_ON(!encoder))
713 funcs = encoder->helper_private;
715 DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
716 encoder->base.id, encoder->name);
719 * Each encoder has at most one connector (since we always steal
720 * it away), so we won't call disable hooks twice.
722 drm_bridge_disable(encoder->bridge);
724 /* Right function depends upon target state. */
726 if (connector->state->crtc && funcs->prepare)
727 funcs->prepare(encoder);
728 else if (funcs->disable)
729 funcs->disable(encoder);
730 else if (funcs->dpms)
731 funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
734 drm_bridge_post_disable(encoder->bridge);
737 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
738 const struct drm_crtc_helper_funcs *funcs;
740 /* Shut down everything that needs a full modeset. */
741 if (!drm_atomic_crtc_needs_modeset(crtc->state))
744 if (!old_crtc_state->active)
747 funcs = crtc->helper_private;
749 DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n",
750 crtc->base.id, crtc->name);
753 /* Right function depends upon target state. */
754 if (crtc->state->enable && funcs->prepare)
755 funcs->prepare(crtc);
756 else if (funcs->atomic_disable)
757 funcs->atomic_disable(crtc, old_crtc_state);
758 else if (funcs->disable)
759 funcs->disable(crtc);
761 funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
766 * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
768 * @old_state: atomic state object with old state structures
770 * This function updates all the various legacy modeset state pointers in
771 * connectors, encoders and crtcs. It also updates the timestamping constants
772 * used for precise vblank timestamps by calling
773 * drm_calc_timestamping_constants().
775 * Drivers can use this for building their own atomic commit if they don't have
776 * a pure helper-based modeset implementation.
779 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
780 struct drm_atomic_state *old_state)
782 struct drm_connector *connector;
783 struct drm_connector_state *old_conn_state;
784 struct drm_crtc *crtc;
785 struct drm_crtc_state *old_crtc_state;
788 /* clear out existing links and update dpms */
789 for_each_connector_in_state(old_state, connector, old_conn_state, i) {
790 if (connector->encoder) {
791 WARN_ON(!connector->encoder->crtc);
793 connector->encoder->crtc = NULL;
794 connector->encoder = NULL;
797 crtc = connector->state->crtc;
798 if ((!crtc && old_conn_state->crtc) ||
799 (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
800 struct drm_property *dpms_prop =
801 dev->mode_config.dpms_property;
802 int mode = DRM_MODE_DPMS_OFF;
804 if (crtc && crtc->state->active)
805 mode = DRM_MODE_DPMS_ON;
807 connector->dpms = mode;
808 drm_object_property_set_value(&connector->base,
814 for_each_connector_in_state(old_state, connector, old_conn_state, i) {
815 if (!connector->state->crtc)
818 if (WARN_ON(!connector->state->best_encoder))
821 connector->encoder = connector->state->best_encoder;
822 connector->encoder->crtc = connector->state->crtc;
825 /* set legacy state in the crtc structure */
826 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
827 struct drm_plane *primary = crtc->primary;
829 crtc->mode = crtc->state->mode;
830 crtc->enabled = crtc->state->enable;
832 if (drm_atomic_get_existing_plane_state(old_state, primary) &&
833 primary->state->crtc == crtc) {
834 crtc->x = primary->state->src_x >> 16;
835 crtc->y = primary->state->src_y >> 16;
838 if (crtc->state->enable)
839 drm_calc_timestamping_constants(crtc,
840 &crtc->state->adjusted_mode);
843 EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
846 crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
848 struct drm_crtc *crtc;
849 struct drm_crtc_state *old_crtc_state;
850 struct drm_connector *connector;
851 struct drm_connector_state *old_conn_state;
854 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
855 const struct drm_crtc_helper_funcs *funcs;
857 if (!crtc->state->mode_changed)
860 funcs = crtc->helper_private;
862 if (crtc->state->enable && funcs->mode_set_nofb) {
863 DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n",
864 crtc->base.id, crtc->name);
866 funcs->mode_set_nofb(crtc);
870 for_each_connector_in_state(old_state, connector, old_conn_state, i) {
871 const struct drm_encoder_helper_funcs *funcs;
872 struct drm_crtc_state *new_crtc_state;
873 struct drm_encoder *encoder;
874 struct drm_display_mode *mode, *adjusted_mode;
876 if (!connector->state->best_encoder)
879 encoder = connector->state->best_encoder;
880 funcs = encoder->helper_private;
881 new_crtc_state = connector->state->crtc->state;
882 mode = &new_crtc_state->mode;
883 adjusted_mode = &new_crtc_state->adjusted_mode;
885 if (!new_crtc_state->mode_changed)
888 DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n",
889 encoder->base.id, encoder->name);
892 * Each encoder has at most one connector (since we always steal
893 * it away), so we won't call mode_set hooks twice.
895 if (funcs && funcs->atomic_mode_set) {
896 funcs->atomic_mode_set(encoder, new_crtc_state,
898 } else if (funcs && funcs->mode_set) {
899 funcs->mode_set(encoder, mode, adjusted_mode);
902 drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
907 * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
909 * @old_state: atomic state object with old state structures
911 * This function shuts down all the outputs that need to be shut down and
912 * prepares them (if required) with the new mode.
914 * For compatibility with legacy crtc helpers this should be called before
915 * drm_atomic_helper_commit_planes(), which is what the default commit function
916 * does. But drivers with different needs can group the modeset commits together
917 * and do the plane commits at the end. This is useful for drivers doing runtime
918 * PM since planes updates then only happen when the CRTC is actually enabled.
920 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
921 struct drm_atomic_state *old_state)
923 disable_outputs(dev, old_state);
925 drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
927 crtc_set_mode(dev, old_state);
929 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables);
932 * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
934 * @old_state: atomic state object with old state structures
936 * This function enables all the outputs with the new configuration which had to
937 * be turned off for the update.
939 * For compatibility with legacy crtc helpers this should be called after
940 * drm_atomic_helper_commit_planes(), which is what the default commit function
941 * does. But drivers with different needs can group the modeset commits together
942 * and do the plane commits at the end. This is useful for drivers doing runtime
943 * PM since planes updates then only happen when the CRTC is actually enabled.
945 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
946 struct drm_atomic_state *old_state)
948 struct drm_crtc *crtc;
949 struct drm_crtc_state *old_crtc_state;
950 struct drm_connector *connector;
951 struct drm_connector_state *old_conn_state;
954 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
955 const struct drm_crtc_helper_funcs *funcs;
957 /* Need to filter out CRTCs where only planes change. */
958 if (!drm_atomic_crtc_needs_modeset(crtc->state))
961 if (!crtc->state->active)
964 funcs = crtc->helper_private;
966 if (crtc->state->enable) {
967 DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
968 crtc->base.id, crtc->name);
977 for_each_connector_in_state(old_state, connector, old_conn_state, i) {
978 const struct drm_encoder_helper_funcs *funcs;
979 struct drm_encoder *encoder;
981 if (!connector->state->best_encoder)
984 if (!connector->state->crtc->state->active ||
985 !drm_atomic_crtc_needs_modeset(connector->state->crtc->state))
988 encoder = connector->state->best_encoder;
989 funcs = encoder->helper_private;
991 DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
992 encoder->base.id, encoder->name);
995 * Each encoder has at most one connector (since we always steal
996 * it away), so we won't call enable hooks twice.
998 drm_bridge_pre_enable(encoder->bridge);
1002 funcs->enable(encoder);
1003 else if (funcs->commit)
1004 funcs->commit(encoder);
1007 drm_bridge_enable(encoder->bridge);
1010 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);
1013 * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
1015 * @state: atomic state object with old state structures
1016 * @pre_swap: If true, do an interruptible wait, and @state is the new state.
1017 * Otherwise @state is the old state.
1019 * For implicit sync, driver should fish the exclusive fence out from the
1020 * incoming fb's and stash it in the drm_plane_state. This is called after
1021 * drm_atomic_helper_swap_state() so it uses the current plane state (and
1022 * just uses the atomic state to find the changed planes)
1024 * Note that @pre_swap is needed since the point where we block for fences moves
1025 * around depending upon whether an atomic commit is blocking or
1026 * non-blocking. For async commit all waiting needs to happen after
1027 * drm_atomic_helper_swap_state() is called, but for synchronous commits we want
1028 * to wait **before** we do anything that can't be easily rolled back. That is
1029 * before we call drm_atomic_helper_swap_state().
1031 * Returns zero if success or < 0 if dma_fence_wait() fails.
1033 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
1034 struct drm_atomic_state *state,
1037 struct drm_plane *plane;
1038 struct drm_plane_state *plane_state;
1041 for_each_plane_in_state(state, plane, plane_state, i) {
1043 plane_state = plane->state;
1045 if (!plane_state->fence)
1048 WARN_ON(!plane_state->fb);
1051 * If waiting for fences pre-swap (ie: nonblock), userspace can
1052 * still interrupt the operation. Instead of blocking until the
1053 * timer expires, make the wait interruptible.
1055 ret = dma_fence_wait(plane_state->fence, pre_swap);
1059 dma_fence_put(plane_state->fence);
1060 plane_state->fence = NULL;
1065 EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);
1068 * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed
1070 * @old_state: atomic state object with old state structures
1073 * Checks whether the framebuffer used for this CRTC changes as a result of
1074 * the atomic update. This is useful for drivers which cannot use
1075 * drm_atomic_helper_wait_for_vblanks() and need to reimplement its
1079 * true if the framebuffer changed.
1081 bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
1082 struct drm_atomic_state *old_state,
1083 struct drm_crtc *crtc)
1085 struct drm_plane *plane;
1086 struct drm_plane_state *old_plane_state;
1089 for_each_plane_in_state(old_state, plane, old_plane_state, i) {
1090 if (plane->state->crtc != crtc &&
1091 old_plane_state->crtc != crtc)
1094 if (plane->state->fb != old_plane_state->fb)
1100 EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed);
1103 * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs
1105 * @old_state: atomic state object with old state structures
1107 * Helper to, after atomic commit, wait for vblanks on all effected
1108 * crtcs (ie. before cleaning up old framebuffers using
1109 * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the
1110 * framebuffers have actually changed to optimize for the legacy cursor and
1111 * plane update use-case.
1114 drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
1115 struct drm_atomic_state *old_state)
1117 struct drm_crtc *crtc;
1118 struct drm_crtc_state *old_crtc_state;
1120 unsigned crtc_mask = 0;
1123 * Legacy cursor ioctls are completely unsynced, and userspace
1124 * relies on that (by doing tons of cursor updates).
1126 if (old_state->legacy_cursor_update)
1129 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
1130 struct drm_crtc_state *new_crtc_state = crtc->state;
1132 if (!new_crtc_state->active)
1135 if (!drm_atomic_helper_framebuffer_changed(dev,
1139 ret = drm_crtc_vblank_get(crtc);
1143 crtc_mask |= drm_crtc_mask(crtc);
1144 old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc);
1147 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
1148 if (!(crtc_mask & drm_crtc_mask(crtc)))
1151 ret = wait_event_timeout(dev->vblank[i].queue,
1152 old_state->crtcs[i].last_vblank_count !=
1153 drm_crtc_vblank_count(crtc),
1154 msecs_to_jiffies(50));
1156 WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id);
1158 drm_crtc_vblank_put(crtc);
1161 EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
1164 * drm_atomic_helper_commit_tail - commit atomic update to hardware
1165 * @old_state: atomic state object with old state structures
1167 * This is the default implemenation for the ->atomic_commit_tail() hook of the
1168 * &drm_mode_config_helper_funcs vtable.
1170 * Note that the default ordering of how the various stages are called is to
1171 * match the legacy modeset helper library closest. One peculiarity of that is
1172 * that it doesn't mesh well with runtime PM at all.
1174 * For drivers supporting runtime PM the recommended sequence is instead ::
1176 * drm_atomic_helper_commit_modeset_disables(dev, old_state);
1178 * drm_atomic_helper_commit_modeset_enables(dev, old_state);
1180 * drm_atomic_helper_commit_planes(dev, old_state,
1181 * DRM_PLANE_COMMIT_ACTIVE_ONLY);
1183 * for committing the atomic update to hardware. See the kerneldoc entries for
1184 * these three functions for more details.
1186 void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state)
1188 struct drm_device *dev = old_state->dev;
1190 drm_atomic_helper_commit_modeset_disables(dev, old_state);
1192 drm_atomic_helper_commit_planes(dev, old_state, 0);
1194 drm_atomic_helper_commit_modeset_enables(dev, old_state);
1196 drm_atomic_helper_commit_hw_done(old_state);
1198 drm_atomic_helper_wait_for_vblanks(dev, old_state);
1200 drm_atomic_helper_cleanup_planes(dev, old_state);
1202 EXPORT_SYMBOL(drm_atomic_helper_commit_tail);
1204 static void commit_tail(struct drm_atomic_state *old_state)
1206 struct drm_device *dev = old_state->dev;
1207 struct drm_mode_config_helper_funcs *funcs;
1209 funcs = dev->mode_config.helper_private;
1211 drm_atomic_helper_wait_for_fences(dev, old_state, false);
1213 drm_atomic_helper_wait_for_dependencies(old_state);
1215 if (funcs && funcs->atomic_commit_tail)
1216 funcs->atomic_commit_tail(old_state);
1218 drm_atomic_helper_commit_tail(old_state);
1220 drm_atomic_helper_commit_cleanup_done(old_state);
1222 drm_atomic_state_put(old_state);
1225 static void commit_work(struct work_struct *work)
1227 struct drm_atomic_state *state = container_of(work,
1228 struct drm_atomic_state,
1234 * drm_atomic_helper_commit - commit validated state object
1236 * @state: the driver state object
1237 * @nonblock: whether nonblocking behavior is requested.
1239 * This function commits a with drm_atomic_helper_check() pre-validated state
1240 * object. This can still fail when e.g. the framebuffer reservation fails. This
1241 * function implements nonblocking commits, using
1242 * drm_atomic_helper_setup_commit() and related functions.
1244 * Committing the actual hardware state is done through the
1245 * ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable,
1246 * or it's default implementation drm_atomic_helper_commit_tail().
1249 * Zero for success or -errno.
1251 int drm_atomic_helper_commit(struct drm_device *dev,
1252 struct drm_atomic_state *state,
1257 ret = drm_atomic_helper_setup_commit(state, nonblock);
1261 INIT_WORK(&state->commit_work, commit_work);
1263 ret = drm_atomic_helper_prepare_planes(dev, state);
1268 ret = drm_atomic_helper_wait_for_fences(dev, state, true);
1274 * This is the point of no return - everything below never fails except
1275 * when the hw goes bonghits. Which means we can commit the new state on
1276 * the software side now.
1279 drm_atomic_helper_swap_state(state, true);
1282 * Everything below can be run asynchronously without the need to grab
1283 * any modeset locks at all under one condition: It must be guaranteed
1284 * that the asynchronous work has either been cancelled (if the driver
1285 * supports it, which at least requires that the framebuffers get
1286 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
1287 * before the new state gets committed on the software side with
1288 * drm_atomic_helper_swap_state().
1290 * This scheme allows new atomic state updates to be prepared and
1291 * checked in parallel to the asynchronous completion of the previous
1292 * update. Which is important since compositors need to figure out the
1293 * composition of the next frame right after having submitted the
1296 * NOTE: Commit work has multiple phases, first hardware commit, then
1297 * cleanup. We want them to overlap, hence need system_unbound_wq to
1298 * make sure work items don't artifically stall on each another.
1301 drm_atomic_state_get(state);
1303 queue_work(system_unbound_wq, &state->commit_work);
1309 EXPORT_SYMBOL(drm_atomic_helper_commit);
1312 * DOC: implementing nonblocking commit
1314 * Nonblocking atomic commits have to be implemented in the following sequence:
1316 * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
1317 * which commit needs to call which can fail, so we want to run it first and
1320 * 2. Synchronize with any outstanding nonblocking commit worker threads which
1321 * might be affected the new state update. This can be done by either cancelling
1322 * or flushing the work items, depending upon whether the driver can deal with
1323 * cancelled updates. Note that it is important to ensure that the framebuffer
1324 * cleanup is still done when cancelling.
1326 * Asynchronous workers need to have sufficient parallelism to be able to run
1327 * different atomic commits on different CRTCs in parallel. The simplest way to
1328 * achive this is by running them on the &system_unbound_wq work queue. Note
1329 * that drivers are not required to split up atomic commits and run an
1330 * individual commit in parallel - userspace is supposed to do that if it cares.
1331 * But it might be beneficial to do that for modesets, since those necessarily
1332 * must be done as one global operation, and enabling or disabling a CRTC can
1333 * take a long time. But even that is not required.
1335 * 3. The software state is updated synchronously with
1336 * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
1337 * locks means concurrent callers never see inconsistent state. And doing this
1338 * while it's guaranteed that no relevant nonblocking worker runs means that
1339 * nonblocking workers do not need grab any locks. Actually they must not grab
1340 * locks, for otherwise the work flushing will deadlock.
1342 * 4. Schedule a work item to do all subsequent steps, using the split-out
1343 * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
1344 * then cleaning up the framebuffers after the old framebuffer is no longer
1347 * The above scheme is implemented in the atomic helper libraries in
1348 * drm_atomic_helper_commit() using a bunch of helper functions. See
1349 * drm_atomic_helper_setup_commit() for a starting point.
1352 static int stall_checks(struct drm_crtc *crtc, bool nonblock)
1354 struct drm_crtc_commit *commit, *stall_commit = NULL;
1355 bool completed = true;
1359 spin_lock(&crtc->commit_lock);
1361 list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
1363 completed = try_wait_for_completion(&commit->flip_done);
1364 /* Userspace is not allowed to get ahead of the previous
1365 * commit with nonblocking ones. */
1366 if (!completed && nonblock) {
1367 spin_unlock(&crtc->commit_lock);
1370 } else if (i == 1) {
1371 stall_commit = commit;
1372 drm_crtc_commit_get(stall_commit);
1378 spin_unlock(&crtc->commit_lock);
1383 /* We don't want to let commits get ahead of cleanup work too much,
1384 * stalling on 2nd previous commit means triple-buffer won't ever stall.
1386 ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done,
1389 DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n",
1390 crtc->base.id, crtc->name);
1392 drm_crtc_commit_put(stall_commit);
1394 return ret < 0 ? ret : 0;
1398 * drm_atomic_helper_setup_commit - setup possibly nonblocking commit
1399 * @state: new modeset state to be committed
1400 * @nonblock: whether nonblocking behavior is requested.
1402 * This function prepares @state to be used by the atomic helper's support for
1403 * nonblocking commits. Drivers using the nonblocking commit infrastructure
1404 * should always call this function from their ->atomic_commit hook.
1406 * To be able to use this support drivers need to use a few more helper
1407 * functions. drm_atomic_helper_wait_for_dependencies() must be called before
1408 * actually committing the hardware state, and for nonblocking commits this call
1409 * must be placed in the async worker. See also drm_atomic_helper_swap_state()
1410 * and it's stall parameter, for when a driver's commit hooks look at the
1411 * ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector directly.
1413 * Completion of the hardware commit step must be signalled using
1414 * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed
1415 * to read or change any permanent software or hardware modeset state. The only
1416 * exception is state protected by other means than &drm_modeset_lock locks.
1417 * Only the free standing @state with pointers to the old state structures can
1418 * be inspected, e.g. to clean up old buffers using
1419 * drm_atomic_helper_cleanup_planes().
1421 * At the very end, before cleaning up @state drivers must call
1422 * drm_atomic_helper_commit_cleanup_done().
1424 * This is all implemented by in drm_atomic_helper_commit(), giving drivers a
1425 * complete and esay-to-use default implementation of the atomic_commit() hook.
1427 * The tracking of asynchronously executed and still pending commits is done
1428 * using the core structure &drm_crtc_commit.
1430 * By default there's no need to clean up resources allocated by this function
1431 * explicitly: drm_atomic_state_default_clear() will take care of that
1436 * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast,
1437 * -ENOMEM on allocation failures and -EINTR when a signal is pending.
1439 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
1442 struct drm_crtc *crtc;
1443 struct drm_crtc_state *crtc_state;
1444 struct drm_crtc_commit *commit;
1447 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1448 commit = kzalloc(sizeof(*commit), GFP_KERNEL);
1452 init_completion(&commit->flip_done);
1453 init_completion(&commit->hw_done);
1454 init_completion(&commit->cleanup_done);
1455 INIT_LIST_HEAD(&commit->commit_entry);
1456 kref_init(&commit->ref);
1457 commit->crtc = crtc;
1459 state->crtcs[i].commit = commit;
1461 ret = stall_checks(crtc, nonblock);
1465 /* Drivers only send out events when at least either current or
1466 * new CRTC state is active. Complete right away if everything
1468 if (!crtc->state->active && !crtc_state->active) {
1469 complete_all(&commit->flip_done);
1473 /* Legacy cursor updates are fully unsynced. */
1474 if (state->legacy_cursor_update) {
1475 complete_all(&commit->flip_done);
1479 if (!crtc_state->event) {
1480 commit->event = kzalloc(sizeof(*commit->event),
1485 crtc_state->event = commit->event;
1488 crtc_state->event->base.completion = &commit->flip_done;
1493 EXPORT_SYMBOL(drm_atomic_helper_setup_commit);
1496 static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc)
1498 struct drm_crtc_commit *commit;
1501 list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
1502 /* skip the first entry, that's the current commit */
1512 * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits
1513 * @old_state: atomic state object with old state structures
1515 * This function waits for all preceeding commits that touch the same CRTC as
1516 * @old_state to both be committed to the hardware (as signalled by
1517 * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled
1518 * by calling drm_crtc_vblank_send_event on the event member of
1521 * This is part of the atomic helper support for nonblocking commits, see
1522 * drm_atomic_helper_setup_commit() for an overview.
1524 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state)
1526 struct drm_crtc *crtc;
1527 struct drm_crtc_state *crtc_state;
1528 struct drm_crtc_commit *commit;
1532 for_each_crtc_in_state(old_state, crtc, crtc_state, i) {
1533 spin_lock(&crtc->commit_lock);
1534 commit = preceeding_commit(crtc);
1536 drm_crtc_commit_get(commit);
1537 spin_unlock(&crtc->commit_lock);
1542 ret = wait_for_completion_timeout(&commit->hw_done,
1545 DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
1546 crtc->base.id, crtc->name);
1548 /* Currently no support for overwriting flips, hence
1549 * stall for previous one to execute completely. */
1550 ret = wait_for_completion_timeout(&commit->flip_done,
1553 DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1554 crtc->base.id, crtc->name);
1556 drm_crtc_commit_put(commit);
1559 EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
1562 * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit
1563 * @old_state: atomic state object with old state structures
1565 * This function is used to signal completion of the hardware commit step. After
1566 * this step the driver is not allowed to read or change any permanent software
1567 * or hardware modeset state. The only exception is state protected by other
1568 * means than &drm_modeset_lock locks.
1570 * Drivers should try to postpone any expensive or delayed cleanup work after
1571 * this function is called.
1573 * This is part of the atomic helper support for nonblocking commits, see
1574 * drm_atomic_helper_setup_commit() for an overview.
1576 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state)
1578 struct drm_crtc *crtc;
1579 struct drm_crtc_state *crtc_state;
1580 struct drm_crtc_commit *commit;
1583 for_each_crtc_in_state(old_state, crtc, crtc_state, i) {
1584 commit = old_state->crtcs[i].commit;
1588 /* backend must have consumed any event by now */
1589 WARN_ON(crtc->state->event);
1590 spin_lock(&crtc->commit_lock);
1591 complete_all(&commit->hw_done);
1592 spin_unlock(&crtc->commit_lock);
1595 EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
1598 * drm_atomic_helper_commit_cleanup_done - signal completion of commit
1599 * @old_state: atomic state object with old state structures
1601 * This signals completion of the atomic update @old_state, including any
1602 * cleanup work. If used, it must be called right before calling
1603 * drm_atomic_state_put().
1605 * This is part of the atomic helper support for nonblocking commits, see
1606 * drm_atomic_helper_setup_commit() for an overview.
1608 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
1610 struct drm_crtc *crtc;
1611 struct drm_crtc_state *crtc_state;
1612 struct drm_crtc_commit *commit;
1616 for_each_crtc_in_state(old_state, crtc, crtc_state, i) {
1617 commit = old_state->crtcs[i].commit;
1618 if (WARN_ON(!commit))
1621 spin_lock(&crtc->commit_lock);
1622 complete_all(&commit->cleanup_done);
1623 WARN_ON(!try_wait_for_completion(&commit->hw_done));
1625 /* commit_list borrows our reference, need to remove before we
1626 * clean up our drm_atomic_state. But only after it actually
1627 * completed, otherwise subsequent commits won't stall properly. */
1628 if (try_wait_for_completion(&commit->flip_done))
1631 spin_unlock(&crtc->commit_lock);
1633 /* We must wait for the vblank event to signal our completion
1634 * before releasing our reference, since the vblank work does
1635 * not hold a reference of its own. */
1636 ret = wait_for_completion_timeout(&commit->flip_done,
1639 DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1640 crtc->base.id, crtc->name);
1642 spin_lock(&crtc->commit_lock);
1644 list_del(&commit->commit_entry);
1645 spin_unlock(&crtc->commit_lock);
1648 EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done);
1651 * drm_atomic_helper_prepare_planes - prepare plane resources before commit
1653 * @state: atomic state object with new state structures
1655 * This function prepares plane state, specifically framebuffers, for the new
1656 * configuration. If any failure is encountered this function will call
1657 * ->cleanup_fb on any already successfully prepared framebuffer.
1660 * 0 on success, negative error code on failure.
1662 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
1663 struct drm_atomic_state *state)
1665 struct drm_plane *plane;
1666 struct drm_plane_state *plane_state;
1669 for_each_plane_in_state(state, plane, plane_state, i) {
1670 const struct drm_plane_helper_funcs *funcs;
1672 funcs = plane->helper_private;
1674 if (funcs->prepare_fb) {
1675 ret = funcs->prepare_fb(plane, plane_state);
1684 for_each_plane_in_state(state, plane, plane_state, j) {
1685 const struct drm_plane_helper_funcs *funcs;
1690 funcs = plane->helper_private;
1692 if (funcs->cleanup_fb)
1693 funcs->cleanup_fb(plane, plane_state);
1698 EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
1700 static bool plane_crtc_active(const struct drm_plane_state *state)
1702 return state->crtc && state->crtc->state->active;
1706 * drm_atomic_helper_commit_planes - commit plane state
1708 * @old_state: atomic state object with old state structures
1709 * @flags: flags for committing plane state
1711 * This function commits the new plane state using the plane and atomic helper
1712 * functions for planes and crtcs. It assumes that the atomic state has already
1713 * been pushed into the relevant object state pointers, since this step can no
1716 * It still requires the global state object @old_state to know which planes and
1717 * crtcs need to be updated though.
1719 * Note that this function does all plane updates across all CRTCs in one step.
1720 * If the hardware can't support this approach look at
1721 * drm_atomic_helper_commit_planes_on_crtc() instead.
1723 * Plane parameters can be updated by applications while the associated CRTC is
1724 * disabled. The DRM/KMS core will store the parameters in the plane state,
1725 * which will be available to the driver when the CRTC is turned on. As a result
1726 * most drivers don't need to be immediately notified of plane updates for a
1729 * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in
1730 * @flags in order not to receive plane update notifications related to a
1731 * disabled CRTC. This avoids the need to manually ignore plane updates in
1732 * driver code when the driver and/or hardware can't or just don't need to deal
1733 * with updates on disabled CRTCs, for example when supporting runtime PM.
1735 * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant
1736 * display controllers require to disable a CRTC's planes when the CRTC is
1737 * disabled. This function would skip the ->atomic_disable call for a plane if
1738 * the CRTC of the old plane state needs a modesetting operation. Of course,
1739 * the drivers need to disable the planes in their CRTC disable callbacks
1740 * since no one else would do that.
1742 * The drm_atomic_helper_commit() default implementation doesn't set the
1743 * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers.
1744 * This should not be copied blindly by drivers.
1746 void drm_atomic_helper_commit_planes(struct drm_device *dev,
1747 struct drm_atomic_state *old_state,
1750 struct drm_crtc *crtc;
1751 struct drm_crtc_state *old_crtc_state;
1752 struct drm_plane *plane;
1753 struct drm_plane_state *old_plane_state;
1755 bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
1756 bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
1758 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
1759 const struct drm_crtc_helper_funcs *funcs;
1761 funcs = crtc->helper_private;
1763 if (!funcs || !funcs->atomic_begin)
1766 if (active_only && !crtc->state->active)
1769 funcs->atomic_begin(crtc, old_crtc_state);
1772 for_each_plane_in_state(old_state, plane, old_plane_state, i) {
1773 const struct drm_plane_helper_funcs *funcs;
1776 funcs = plane->helper_private;
1781 disabling = drm_atomic_plane_disabling(plane, old_plane_state);
1785 * Skip planes related to inactive CRTCs. If the plane
1786 * is enabled use the state of the current CRTC. If the
1787 * plane is being disabled use the state of the old
1788 * CRTC to avoid skipping planes being disabled on an
1791 if (!disabling && !plane_crtc_active(plane->state))
1793 if (disabling && !plane_crtc_active(old_plane_state))
1798 * Special-case disabling the plane if drivers support it.
1800 if (disabling && funcs->atomic_disable) {
1801 struct drm_crtc_state *crtc_state;
1803 crtc_state = old_plane_state->crtc->state;
1805 if (drm_atomic_crtc_needs_modeset(crtc_state) &&
1809 funcs->atomic_disable(plane, old_plane_state);
1810 } else if (plane->state->crtc || disabling) {
1811 funcs->atomic_update(plane, old_plane_state);
1815 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
1816 const struct drm_crtc_helper_funcs *funcs;
1818 funcs = crtc->helper_private;
1820 if (!funcs || !funcs->atomic_flush)
1823 if (active_only && !crtc->state->active)
1826 funcs->atomic_flush(crtc, old_crtc_state);
1829 EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
1832 * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc
1833 * @old_crtc_state: atomic state object with the old crtc state
1835 * This function commits the new plane state using the plane and atomic helper
1836 * functions for planes on the specific crtc. It assumes that the atomic state
1837 * has already been pushed into the relevant object state pointers, since this
1838 * step can no longer fail.
1840 * This function is useful when plane updates should be done crtc-by-crtc
1841 * instead of one global step like drm_atomic_helper_commit_planes() does.
1843 * This function can only be savely used when planes are not allowed to move
1844 * between different CRTCs because this function doesn't handle inter-CRTC
1845 * depencies. Callers need to ensure that either no such depencies exist,
1846 * resolve them through ordering of commit calls or through some other means.
1849 drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
1851 const struct drm_crtc_helper_funcs *crtc_funcs;
1852 struct drm_crtc *crtc = old_crtc_state->crtc;
1853 struct drm_atomic_state *old_state = old_crtc_state->state;
1854 struct drm_plane *plane;
1855 unsigned plane_mask;
1857 plane_mask = old_crtc_state->plane_mask;
1858 plane_mask |= crtc->state->plane_mask;
1860 crtc_funcs = crtc->helper_private;
1861 if (crtc_funcs && crtc_funcs->atomic_begin)
1862 crtc_funcs->atomic_begin(crtc, old_crtc_state);
1864 drm_for_each_plane_mask(plane, crtc->dev, plane_mask) {
1865 struct drm_plane_state *old_plane_state =
1866 drm_atomic_get_existing_plane_state(old_state, plane);
1867 const struct drm_plane_helper_funcs *plane_funcs;
1869 plane_funcs = plane->helper_private;
1871 if (!old_plane_state || !plane_funcs)
1874 WARN_ON(plane->state->crtc && plane->state->crtc != crtc);
1876 if (drm_atomic_plane_disabling(plane, old_plane_state) &&
1877 plane_funcs->atomic_disable)
1878 plane_funcs->atomic_disable(plane, old_plane_state);
1879 else if (plane->state->crtc ||
1880 drm_atomic_plane_disabling(plane, old_plane_state))
1881 plane_funcs->atomic_update(plane, old_plane_state);
1884 if (crtc_funcs && crtc_funcs->atomic_flush)
1885 crtc_funcs->atomic_flush(crtc, old_crtc_state);
1887 EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);
1890 * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
1891 * @old_crtc_state: atomic state object with the old CRTC state
1892 * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks
1894 * Disables all planes associated with the given CRTC. This can be
1895 * used for instance in the CRTC helper atomic_disable callback to disable
1898 * If the atomic-parameter is set the function calls the CRTC's
1899 * atomic_begin hook before and atomic_flush hook after disabling the
1902 * It is a bug to call this function without having implemented the
1903 * ->atomic_disable() plane hook.
1906 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
1909 struct drm_crtc *crtc = old_crtc_state->crtc;
1910 const struct drm_crtc_helper_funcs *crtc_funcs =
1911 crtc->helper_private;
1912 struct drm_plane *plane;
1914 if (atomic && crtc_funcs && crtc_funcs->atomic_begin)
1915 crtc_funcs->atomic_begin(crtc, NULL);
1917 drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) {
1918 const struct drm_plane_helper_funcs *plane_funcs =
1919 plane->helper_private;
1924 WARN_ON(!plane_funcs->atomic_disable);
1925 if (plane_funcs->atomic_disable)
1926 plane_funcs->atomic_disable(plane, NULL);
1929 if (atomic && crtc_funcs && crtc_funcs->atomic_flush)
1930 crtc_funcs->atomic_flush(crtc, NULL);
1932 EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc);
1935 * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
1937 * @old_state: atomic state object with old state structures
1939 * This function cleans up plane state, specifically framebuffers, from the old
1940 * configuration. Hence the old configuration must be perserved in @old_state to
1941 * be able to call this function.
1943 * This function must also be called on the new state when the atomic update
1944 * fails at any point after calling drm_atomic_helper_prepare_planes().
1946 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
1947 struct drm_atomic_state *old_state)
1949 struct drm_plane *plane;
1950 struct drm_plane_state *plane_state;
1953 for_each_plane_in_state(old_state, plane, plane_state, i) {
1954 const struct drm_plane_helper_funcs *funcs;
1956 funcs = plane->helper_private;
1958 if (funcs->cleanup_fb)
1959 funcs->cleanup_fb(plane, plane_state);
1962 EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
1965 * drm_atomic_helper_swap_state - store atomic state into current sw state
1966 * @state: atomic state
1967 * @stall: stall for proceeding commits
1969 * This function stores the atomic state into the current state pointers in all
1970 * driver objects. It should be called after all failing steps have been done
1971 * and succeeded, but before the actual hardware state is committed.
1973 * For cleanup and error recovery the current state for all changed objects will
1974 * be swaped into @state.
1976 * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
1978 * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
1980 * 2. Do any other steps that might fail.
1982 * 3. Put the staged state into the current state pointers with this function.
1984 * 4. Actually commit the hardware state.
1986 * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3
1987 * contains the old state. Also do any other cleanup required with that state.
1989 * @stall must be set when nonblocking commits for this driver directly access
1990 * the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the
1991 * current atomic helpers this is almost always the case, since the helpers
1992 * don't pass the right state structures to the callbacks.
1994 void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
1999 struct drm_connector *connector;
2000 struct drm_connector_state *conn_state;
2001 struct drm_crtc *crtc;
2002 struct drm_crtc_state *crtc_state;
2003 struct drm_plane *plane;
2004 struct drm_plane_state *plane_state;
2005 struct drm_crtc_commit *commit;
2008 for_each_crtc_in_state(state, crtc, crtc_state, i) {
2009 spin_lock(&crtc->commit_lock);
2010 commit = list_first_entry_or_null(&crtc->commit_list,
2011 struct drm_crtc_commit, commit_entry);
2013 drm_crtc_commit_get(commit);
2014 spin_unlock(&crtc->commit_lock);
2019 ret = wait_for_completion_timeout(&commit->hw_done,
2022 DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
2023 crtc->base.id, crtc->name);
2024 drm_crtc_commit_put(commit);
2028 for_each_connector_in_state(state, connector, conn_state, i) {
2029 connector->state->state = state;
2030 swap(state->connectors[i].state, connector->state);
2031 connector->state->state = NULL;
2034 for_each_crtc_in_state(state, crtc, crtc_state, i) {
2035 crtc->state->state = state;
2036 swap(state->crtcs[i].state, crtc->state);
2037 crtc->state->state = NULL;
2039 if (state->crtcs[i].commit) {
2040 spin_lock(&crtc->commit_lock);
2041 list_add(&state->crtcs[i].commit->commit_entry,
2042 &crtc->commit_list);
2043 spin_unlock(&crtc->commit_lock);
2045 state->crtcs[i].commit->event = NULL;
2049 for_each_plane_in_state(state, plane, plane_state, i) {
2050 plane->state->state = state;
2051 swap(state->planes[i].state, plane->state);
2052 plane->state->state = NULL;
2055 EXPORT_SYMBOL(drm_atomic_helper_swap_state);
2058 * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
2059 * @plane: plane object to update
2060 * @crtc: owning CRTC of owning plane
2061 * @fb: framebuffer to flip onto plane
2062 * @crtc_x: x offset of primary plane on crtc
2063 * @crtc_y: y offset of primary plane on crtc
2064 * @crtc_w: width of primary plane rectangle on crtc
2065 * @crtc_h: height of primary plane rectangle on crtc
2066 * @src_x: x offset of @fb for panning
2067 * @src_y: y offset of @fb for panning
2068 * @src_w: width of source rectangle in @fb
2069 * @src_h: height of source rectangle in @fb
2071 * Provides a default plane update handler using the atomic driver interface.
2074 * Zero on success, error code on failure
2076 int drm_atomic_helper_update_plane(struct drm_plane *plane,
2077 struct drm_crtc *crtc,
2078 struct drm_framebuffer *fb,
2079 int crtc_x, int crtc_y,
2080 unsigned int crtc_w, unsigned int crtc_h,
2081 uint32_t src_x, uint32_t src_y,
2082 uint32_t src_w, uint32_t src_h)
2084 struct drm_atomic_state *state;
2085 struct drm_plane_state *plane_state;
2088 state = drm_atomic_state_alloc(plane->dev);
2092 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
2094 plane_state = drm_atomic_get_plane_state(state, plane);
2095 if (IS_ERR(plane_state)) {
2096 ret = PTR_ERR(plane_state);
2100 ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
2103 drm_atomic_set_fb_for_plane(plane_state, fb);
2104 plane_state->crtc_x = crtc_x;
2105 plane_state->crtc_y = crtc_y;
2106 plane_state->crtc_w = crtc_w;
2107 plane_state->crtc_h = crtc_h;
2108 plane_state->src_x = src_x;
2109 plane_state->src_y = src_y;
2110 plane_state->src_w = src_w;
2111 plane_state->src_h = src_h;
2113 if (plane == crtc->cursor)
2114 state->legacy_cursor_update = true;
2116 ret = drm_atomic_commit(state);
2118 if (ret == -EDEADLK)
2121 drm_atomic_state_put(state);
2125 drm_atomic_state_clear(state);
2126 drm_atomic_legacy_backoff(state);
2129 * Someone might have exchanged the framebuffer while we dropped locks
2130 * in the backoff code. We need to fix up the fb refcount tracking the
2133 plane->old_fb = plane->fb;
2137 EXPORT_SYMBOL(drm_atomic_helper_update_plane);
2140 * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
2141 * @plane: plane to disable
2143 * Provides a default plane disable handler using the atomic driver interface.
2146 * Zero on success, error code on failure
2148 int drm_atomic_helper_disable_plane(struct drm_plane *plane)
2150 struct drm_atomic_state *state;
2151 struct drm_plane_state *plane_state;
2155 * FIXME: Without plane->crtc set we can't get at the implicit legacy
2156 * acquire context. The real fix will be to wire the acquire ctx through
2157 * everywhere we need it, but meanwhile prevent chaos by just skipping
2158 * this noop. The critical case is the cursor ioctls which a) only grab
2159 * crtc/cursor-plane locks (so we need the crtc to get at the right
2160 * acquire context) and b) can try to disable the plane multiple times.
2165 state = drm_atomic_state_alloc(plane->dev);
2169 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
2171 plane_state = drm_atomic_get_plane_state(state, plane);
2172 if (IS_ERR(plane_state)) {
2173 ret = PTR_ERR(plane_state);
2177 if (plane_state->crtc && (plane == plane->crtc->cursor))
2178 plane_state->state->legacy_cursor_update = true;
2180 ret = __drm_atomic_helper_disable_plane(plane, plane_state);
2184 ret = drm_atomic_commit(state);
2186 if (ret == -EDEADLK)
2189 drm_atomic_state_put(state);
2193 drm_atomic_state_clear(state);
2194 drm_atomic_legacy_backoff(state);
2197 * Someone might have exchanged the framebuffer while we dropped locks
2198 * in the backoff code. We need to fix up the fb refcount tracking the
2201 plane->old_fb = plane->fb;
2205 EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
2207 /* just used from fb-helper and atomic-helper: */
2208 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
2209 struct drm_plane_state *plane_state)
2213 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
2217 drm_atomic_set_fb_for_plane(plane_state, NULL);
2218 plane_state->crtc_x = 0;
2219 plane_state->crtc_y = 0;
2220 plane_state->crtc_w = 0;
2221 plane_state->crtc_h = 0;
2222 plane_state->src_x = 0;
2223 plane_state->src_y = 0;
2224 plane_state->src_w = 0;
2225 plane_state->src_h = 0;
2230 static int update_output_state(struct drm_atomic_state *state,
2231 struct drm_mode_set *set)
2233 struct drm_device *dev = set->crtc->dev;
2234 struct drm_crtc *crtc;
2235 struct drm_crtc_state *crtc_state;
2236 struct drm_connector *connector;
2237 struct drm_connector_state *conn_state;
2240 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
2241 state->acquire_ctx);
2245 /* First disable all connectors on the target crtc. */
2246 ret = drm_atomic_add_affected_connectors(state, set->crtc);
2250 for_each_connector_in_state(state, connector, conn_state, i) {
2251 if (conn_state->crtc == set->crtc) {
2252 ret = drm_atomic_set_crtc_for_connector(conn_state,
2259 /* Then set all connectors from set->connectors on the target crtc */
2260 for (i = 0; i < set->num_connectors; i++) {
2261 conn_state = drm_atomic_get_connector_state(state,
2262 set->connectors[i]);
2263 if (IS_ERR(conn_state))
2264 return PTR_ERR(conn_state);
2266 ret = drm_atomic_set_crtc_for_connector(conn_state,
2272 for_each_crtc_in_state(state, crtc, crtc_state, i) {
2273 /* Don't update ->enable for the CRTC in the set_config request,
2274 * since a mismatch would indicate a bug in the upper layers.
2275 * The actual modeset code later on will catch any
2276 * inconsistencies here. */
2277 if (crtc == set->crtc)
2280 if (!crtc_state->connector_mask) {
2281 ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
2286 crtc_state->active = false;
2294 * drm_atomic_helper_set_config - set a new config from userspace
2295 * @set: mode set configuration
2297 * Provides a default crtc set_config handler using the atomic driver interface.
2300 * Returns 0 on success, negative errno numbers on failure.
2302 int drm_atomic_helper_set_config(struct drm_mode_set *set)
2304 struct drm_atomic_state *state;
2305 struct drm_crtc *crtc = set->crtc;
2308 state = drm_atomic_state_alloc(crtc->dev);
2312 state->legacy_set_config = true;
2313 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
2315 ret = __drm_atomic_helper_set_config(set, state);
2319 ret = drm_atomic_commit(state);
2321 if (ret == -EDEADLK)
2324 drm_atomic_state_put(state);
2328 drm_atomic_state_clear(state);
2329 drm_atomic_legacy_backoff(state);
2332 * Someone might have exchanged the framebuffer while we dropped locks
2333 * in the backoff code. We need to fix up the fb refcount tracking the
2336 crtc->primary->old_fb = crtc->primary->fb;
2340 EXPORT_SYMBOL(drm_atomic_helper_set_config);
2342 /* just used from fb-helper and atomic-helper: */
2343 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
2344 struct drm_atomic_state *state)
2346 struct drm_crtc_state *crtc_state;
2347 struct drm_plane_state *primary_state;
2348 struct drm_crtc *crtc = set->crtc;
2349 int hdisplay, vdisplay;
2352 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2353 if (IS_ERR(crtc_state))
2354 return PTR_ERR(crtc_state);
2356 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
2357 if (IS_ERR(primary_state))
2358 return PTR_ERR(primary_state);
2362 WARN_ON(set->num_connectors);
2364 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
2368 crtc_state->active = false;
2370 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
2374 drm_atomic_set_fb_for_plane(primary_state, NULL);
2380 WARN_ON(!set->num_connectors);
2382 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
2386 crtc_state->active = true;
2388 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
2392 drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay);
2394 drm_atomic_set_fb_for_plane(primary_state, set->fb);
2395 primary_state->crtc_x = 0;
2396 primary_state->crtc_y = 0;
2397 primary_state->crtc_w = hdisplay;
2398 primary_state->crtc_h = vdisplay;
2399 primary_state->src_x = set->x << 16;
2400 primary_state->src_y = set->y << 16;
2401 if (drm_rotation_90_or_270(primary_state->rotation)) {
2402 primary_state->src_w = vdisplay << 16;
2403 primary_state->src_h = hdisplay << 16;
2405 primary_state->src_w = hdisplay << 16;
2406 primary_state->src_h = vdisplay << 16;
2410 ret = update_output_state(state, set);
2418 * drm_atomic_helper_disable_all - disable all currently active outputs
2420 * @ctx: lock acquisition context
2422 * Loops through all connectors, finding those that aren't turned off and then
2423 * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
2424 * that they are connected to.
2426 * This is used for example in suspend/resume to disable all currently active
2427 * functions when suspending.
2429 * Note that if callers haven't already acquired all modeset locks this might
2430 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
2433 * 0 on success or a negative error code on failure.
2436 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
2438 int drm_atomic_helper_disable_all(struct drm_device *dev,
2439 struct drm_modeset_acquire_ctx *ctx)
2441 struct drm_atomic_state *state;
2442 struct drm_connector *conn;
2443 struct drm_connector_list_iter conn_iter;
2446 state = drm_atomic_state_alloc(dev);
2450 state->acquire_ctx = ctx;
2452 drm_connector_list_iter_get(dev, &conn_iter);
2453 drm_for_each_connector_iter(conn, &conn_iter) {
2454 struct drm_crtc *crtc = conn->state->crtc;
2455 struct drm_crtc_state *crtc_state;
2457 if (!crtc || conn->dpms != DRM_MODE_DPMS_ON)
2460 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2461 if (IS_ERR(crtc_state)) {
2462 err = PTR_ERR(crtc_state);
2466 crtc_state->active = false;
2469 err = drm_atomic_commit(state);
2471 drm_connector_list_iter_put(&conn_iter);
2472 drm_atomic_state_put(state);
2475 EXPORT_SYMBOL(drm_atomic_helper_disable_all);
2478 * drm_atomic_helper_suspend - subsystem-level suspend helper
2481 * Duplicates the current atomic state, disables all active outputs and then
2482 * returns a pointer to the original atomic state to the caller. Drivers can
2483 * pass this pointer to the drm_atomic_helper_resume() helper upon resume to
2484 * restore the output configuration that was active at the time the system
2487 * Note that it is potentially unsafe to use this. The atomic state object
2488 * returned by this function is assumed to be persistent. Drivers must ensure
2489 * that this holds true. Before calling this function, drivers must make sure
2490 * to suspend fbdev emulation so that nothing can be using the device.
2493 * A pointer to a copy of the state before suspend on success or an ERR_PTR()-
2494 * encoded error code on failure. Drivers should store the returned atomic
2495 * state object and pass it to the drm_atomic_helper_resume() helper upon
2499 * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(),
2500 * drm_atomic_helper_resume()
2502 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev)
2504 struct drm_modeset_acquire_ctx ctx;
2505 struct drm_atomic_state *state;
2508 drm_modeset_acquire_init(&ctx, 0);
2511 err = drm_modeset_lock_all_ctx(dev, &ctx);
2513 state = ERR_PTR(err);
2517 state = drm_atomic_helper_duplicate_state(dev, &ctx);
2521 err = drm_atomic_helper_disable_all(dev, &ctx);
2523 drm_atomic_state_put(state);
2524 state = ERR_PTR(err);
2529 if (PTR_ERR(state) == -EDEADLK) {
2530 drm_modeset_backoff(&ctx);
2534 drm_modeset_drop_locks(&ctx);
2535 drm_modeset_acquire_fini(&ctx);
2538 EXPORT_SYMBOL(drm_atomic_helper_suspend);
2541 * drm_atomic_helper_resume - subsystem-level resume helper
2543 * @state: atomic state to resume to
2545 * Calls drm_mode_config_reset() to synchronize hardware and software states,
2546 * grabs all modeset locks and commits the atomic state object. This can be
2547 * used in conjunction with the drm_atomic_helper_suspend() helper to
2548 * implement suspend/resume for drivers that support atomic mode-setting.
2551 * 0 on success or a negative error code on failure.
2554 * drm_atomic_helper_suspend()
2556 int drm_atomic_helper_resume(struct drm_device *dev,
2557 struct drm_atomic_state *state)
2559 struct drm_mode_config *config = &dev->mode_config;
2562 drm_mode_config_reset(dev);
2563 drm_modeset_lock_all(dev);
2564 state->acquire_ctx = config->acquire_ctx;
2565 err = drm_atomic_commit(state);
2566 drm_modeset_unlock_all(dev);
2570 EXPORT_SYMBOL(drm_atomic_helper_resume);
2573 * drm_atomic_helper_crtc_set_property - helper for crtc properties
2575 * @property: DRM property
2576 * @val: value of property
2578 * Provides a default crtc set_property handler using the atomic driver
2582 * Zero on success, error code on failure
2585 drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
2586 struct drm_property *property,
2589 struct drm_atomic_state *state;
2590 struct drm_crtc_state *crtc_state;
2593 state = drm_atomic_state_alloc(crtc->dev);
2597 /* ->set_property is always called with all locks held. */
2598 state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
2600 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2601 if (IS_ERR(crtc_state)) {
2602 ret = PTR_ERR(crtc_state);
2606 ret = drm_atomic_crtc_set_property(crtc, crtc_state,
2611 ret = drm_atomic_commit(state);
2613 if (ret == -EDEADLK)
2616 drm_atomic_state_put(state);
2620 drm_atomic_state_clear(state);
2621 drm_atomic_legacy_backoff(state);
2625 EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property);
2628 * drm_atomic_helper_plane_set_property - helper for plane properties
2630 * @property: DRM property
2631 * @val: value of property
2633 * Provides a default plane set_property handler using the atomic driver
2637 * Zero on success, error code on failure
2640 drm_atomic_helper_plane_set_property(struct drm_plane *plane,
2641 struct drm_property *property,
2644 struct drm_atomic_state *state;
2645 struct drm_plane_state *plane_state;
2648 state = drm_atomic_state_alloc(plane->dev);
2652 /* ->set_property is always called with all locks held. */
2653 state->acquire_ctx = plane->dev->mode_config.acquire_ctx;
2655 plane_state = drm_atomic_get_plane_state(state, plane);
2656 if (IS_ERR(plane_state)) {
2657 ret = PTR_ERR(plane_state);
2661 ret = drm_atomic_plane_set_property(plane, plane_state,
2666 ret = drm_atomic_commit(state);
2668 if (ret == -EDEADLK)
2671 drm_atomic_state_put(state);
2675 drm_atomic_state_clear(state);
2676 drm_atomic_legacy_backoff(state);
2680 EXPORT_SYMBOL(drm_atomic_helper_plane_set_property);
2683 * drm_atomic_helper_connector_set_property - helper for connector properties
2684 * @connector: DRM connector
2685 * @property: DRM property
2686 * @val: value of property
2688 * Provides a default connector set_property handler using the atomic driver
2692 * Zero on success, error code on failure
2695 drm_atomic_helper_connector_set_property(struct drm_connector *connector,
2696 struct drm_property *property,
2699 struct drm_atomic_state *state;
2700 struct drm_connector_state *connector_state;
2703 state = drm_atomic_state_alloc(connector->dev);
2707 /* ->set_property is always called with all locks held. */
2708 state->acquire_ctx = connector->dev->mode_config.acquire_ctx;
2710 connector_state = drm_atomic_get_connector_state(state, connector);
2711 if (IS_ERR(connector_state)) {
2712 ret = PTR_ERR(connector_state);
2716 ret = drm_atomic_connector_set_property(connector, connector_state,
2721 ret = drm_atomic_commit(state);
2723 if (ret == -EDEADLK)
2726 drm_atomic_state_put(state);
2730 drm_atomic_state_clear(state);
2731 drm_atomic_legacy_backoff(state);
2735 EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
2738 * drm_atomic_helper_page_flip - execute a legacy page flip
2740 * @fb: DRM framebuffer
2741 * @event: optional DRM event to signal upon completion
2742 * @flags: flip flags for non-vblank sync'ed updates
2744 * Provides a default page flip implementation using the atomic driver interface.
2746 * Note that for now so called async page flips (i.e. updates which are not
2747 * synchronized to vblank) are not supported, since the atomic interfaces have
2748 * no provisions for this yet.
2751 * Returns 0 on success, negative errno numbers on failure.
2753 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
2754 struct drm_framebuffer *fb,
2755 struct drm_pending_vblank_event *event,
2758 struct drm_plane *plane = crtc->primary;
2759 struct drm_atomic_state *state;
2760 struct drm_plane_state *plane_state;
2761 struct drm_crtc_state *crtc_state;
2764 if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
2767 state = drm_atomic_state_alloc(plane->dev);
2771 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
2773 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2774 if (IS_ERR(crtc_state)) {
2775 ret = PTR_ERR(crtc_state);
2778 crtc_state->event = event;
2780 plane_state = drm_atomic_get_plane_state(state, plane);
2781 if (IS_ERR(plane_state)) {
2782 ret = PTR_ERR(plane_state);
2786 ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
2789 drm_atomic_set_fb_for_plane(plane_state, fb);
2791 /* Make sure we don't accidentally do a full modeset. */
2792 state->allow_modeset = false;
2793 if (!crtc_state->active) {
2794 DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
2800 ret = drm_atomic_nonblocking_commit(state);
2802 if (ret == -EDEADLK)
2805 drm_atomic_state_put(state);
2809 drm_atomic_state_clear(state);
2810 drm_atomic_legacy_backoff(state);
2813 * Someone might have exchanged the framebuffer while we dropped locks
2814 * in the backoff code. We need to fix up the fb refcount tracking the
2817 plane->old_fb = plane->fb;
2821 EXPORT_SYMBOL(drm_atomic_helper_page_flip);
2824 * drm_atomic_helper_connector_dpms() - connector dpms helper implementation
2825 * @connector: affected connector
2828 * This is the main helper function provided by the atomic helper framework for
2829 * implementing the legacy DPMS connector interface. It computes the new desired
2830 * ->active state for the corresponding CRTC (if the connector is enabled) and
2834 * Returns 0 on success, negative errno numbers on failure.
2836 int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
2839 struct drm_mode_config *config = &connector->dev->mode_config;
2840 struct drm_atomic_state *state;
2841 struct drm_crtc_state *crtc_state;
2842 struct drm_crtc *crtc;
2843 struct drm_connector *tmp_connector;
2844 struct drm_connector_list_iter conn_iter;
2846 bool active = false;
2847 int old_mode = connector->dpms;
2849 if (mode != DRM_MODE_DPMS_ON)
2850 mode = DRM_MODE_DPMS_OFF;
2852 connector->dpms = mode;
2853 crtc = connector->state->crtc;
2858 state = drm_atomic_state_alloc(connector->dev);
2862 state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
2864 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2865 if (IS_ERR(crtc_state)) {
2866 ret = PTR_ERR(crtc_state);
2870 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
2872 drm_connector_list_iter_get(connector->dev, &conn_iter);
2873 drm_for_each_connector_iter(tmp_connector, &conn_iter) {
2874 if (tmp_connector->state->crtc != crtc)
2877 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
2882 drm_connector_list_iter_put(&conn_iter);
2883 crtc_state->active = active;
2885 ret = drm_atomic_commit(state);
2887 if (ret == -EDEADLK)
2890 connector->dpms = old_mode;
2891 drm_atomic_state_put(state);
2895 drm_atomic_state_clear(state);
2896 drm_atomic_legacy_backoff(state);
2900 EXPORT_SYMBOL(drm_atomic_helper_connector_dpms);
2903 * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs
2904 * ->best_encoder callback
2905 * @connector: Connector control structure
2907 * This is a &drm_connector_helper_funcs ->best_encoder callback helper for
2908 * connectors that support exactly 1 encoder, statically determined at driver
2911 struct drm_encoder *
2912 drm_atomic_helper_best_encoder(struct drm_connector *connector)
2914 WARN_ON(connector->encoder_ids[1]);
2915 return drm_encoder_find(connector->dev, connector->encoder_ids[0]);
2917 EXPORT_SYMBOL(drm_atomic_helper_best_encoder);
2920 * DOC: atomic state reset and initialization
2922 * Both the drm core and the atomic helpers assume that there is always the full
2923 * and correct atomic software state for all connectors, CRTCs and planes
2924 * available. Which is a bit a problem on driver load and also after system
2925 * suspend. One way to solve this is to have a hardware state read-out
2926 * infrastructure which reconstructs the full software state (e.g. the i915
2929 * The simpler solution is to just reset the software state to everything off,
2930 * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
2931 * the atomic helpers provide default reset implementations for all hooks.
2933 * On the upside the precise state tracking of atomic simplifies system suspend
2934 * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
2935 * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
2936 * For other drivers the building blocks are split out, see the documentation
2937 * for these functions.
2941 * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs
2944 * Resets the atomic state for @crtc by freeing the state pointer (which might
2945 * be NULL, e.g. at driver load time) and allocating a new empty state object.
2947 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
2950 __drm_atomic_helper_crtc_destroy_state(crtc->state);
2953 crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
2956 crtc->state->crtc = crtc;
2958 EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
2961 * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state
2962 * @crtc: CRTC object
2963 * @state: atomic CRTC state
2965 * Copies atomic state from a CRTC's current state and resets inferred values.
2966 * This is useful for drivers that subclass the CRTC state.
2968 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
2969 struct drm_crtc_state *state)
2971 memcpy(state, crtc->state, sizeof(*state));
2973 if (state->mode_blob)
2974 drm_property_reference_blob(state->mode_blob);
2975 if (state->degamma_lut)
2976 drm_property_reference_blob(state->degamma_lut);
2978 drm_property_reference_blob(state->ctm);
2979 if (state->gamma_lut)
2980 drm_property_reference_blob(state->gamma_lut);
2981 state->mode_changed = false;
2982 state->active_changed = false;
2983 state->planes_changed = false;
2984 state->connectors_changed = false;
2985 state->color_mgmt_changed = false;
2986 state->zpos_changed = false;
2987 state->event = NULL;
2989 EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
2992 * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
2995 * Default CRTC state duplicate hook for drivers which don't have their own
2996 * subclassed CRTC state structure.
2998 struct drm_crtc_state *
2999 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
3001 struct drm_crtc_state *state;
3003 if (WARN_ON(!crtc->state))
3006 state = kmalloc(sizeof(*state), GFP_KERNEL);
3008 __drm_atomic_helper_crtc_duplicate_state(crtc, state);
3012 EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
3015 * __drm_atomic_helper_crtc_destroy_state - release CRTC state
3016 * @state: CRTC state object to release
3018 * Releases all resources stored in the CRTC state without actually freeing
3019 * the memory of the CRTC state. This is useful for drivers that subclass the
3022 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
3024 drm_property_unreference_blob(state->mode_blob);
3025 drm_property_unreference_blob(state->degamma_lut);
3026 drm_property_unreference_blob(state->ctm);
3027 drm_property_unreference_blob(state->gamma_lut);
3029 EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
3032 * drm_atomic_helper_crtc_destroy_state - default state destroy hook
3034 * @state: CRTC state object to release
3036 * Default CRTC state destroy hook for drivers which don't have their own
3037 * subclassed CRTC state structure.
3039 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
3040 struct drm_crtc_state *state)
3042 __drm_atomic_helper_crtc_destroy_state(state);
3045 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
3048 * drm_atomic_helper_plane_reset - default ->reset hook for planes
3051 * Resets the atomic state for @plane by freeing the state pointer (which might
3052 * be NULL, e.g. at driver load time) and allocating a new empty state object.
3054 void drm_atomic_helper_plane_reset(struct drm_plane *plane)
3057 __drm_atomic_helper_plane_destroy_state(plane->state);
3059 kfree(plane->state);
3060 plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
3063 plane->state->plane = plane;
3064 plane->state->rotation = DRM_ROTATE_0;
3067 EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
3070 * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
3071 * @plane: plane object
3072 * @state: atomic plane state
3074 * Copies atomic state from a plane's current state. This is useful for
3075 * drivers that subclass the plane state.
3077 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
3078 struct drm_plane_state *state)
3080 memcpy(state, plane->state, sizeof(*state));
3083 drm_framebuffer_reference(state->fb);
3085 state->fence = NULL;
3087 EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
3090 * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
3093 * Default plane state duplicate hook for drivers which don't have their own
3094 * subclassed plane state structure.
3096 struct drm_plane_state *
3097 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
3099 struct drm_plane_state *state;
3101 if (WARN_ON(!plane->state))
3104 state = kmalloc(sizeof(*state), GFP_KERNEL);
3106 __drm_atomic_helper_plane_duplicate_state(plane, state);
3110 EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
3113 * __drm_atomic_helper_plane_destroy_state - release plane state
3114 * @state: plane state object to release
3116 * Releases all resources stored in the plane state without actually freeing
3117 * the memory of the plane state. This is useful for drivers that subclass the
3120 void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
3123 drm_framebuffer_unreference(state->fb);
3126 dma_fence_put(state->fence);
3128 EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
3131 * drm_atomic_helper_plane_destroy_state - default state destroy hook
3133 * @state: plane state object to release
3135 * Default plane state destroy hook for drivers which don't have their own
3136 * subclassed plane state structure.
3138 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
3139 struct drm_plane_state *state)
3141 __drm_atomic_helper_plane_destroy_state(state);
3144 EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
3147 * __drm_atomic_helper_connector_reset - reset state on connector
3148 * @connector: drm connector
3149 * @conn_state: connector state to assign
3151 * Initializes the newly allocated @conn_state and assigns it to
3152 * #connector ->state, usually required when initializing the drivers
3153 * or when called from the ->reset hook.
3155 * This is useful for drivers that subclass the connector state.
3158 __drm_atomic_helper_connector_reset(struct drm_connector *connector,
3159 struct drm_connector_state *conn_state)
3162 conn_state->connector = connector;
3164 connector->state = conn_state;
3166 EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
3169 * drm_atomic_helper_connector_reset - default ->reset hook for connectors
3170 * @connector: drm connector
3172 * Resets the atomic state for @connector by freeing the state pointer (which
3173 * might be NULL, e.g. at driver load time) and allocating a new empty state
3176 void drm_atomic_helper_connector_reset(struct drm_connector *connector)
3178 struct drm_connector_state *conn_state =
3179 kzalloc(sizeof(*conn_state), GFP_KERNEL);
3181 if (connector->state)
3182 __drm_atomic_helper_connector_destroy_state(connector->state);
3184 kfree(connector->state);
3185 __drm_atomic_helper_connector_reset(connector, conn_state);
3187 EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
3190 * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
3191 * @connector: connector object
3192 * @state: atomic connector state
3194 * Copies atomic state from a connector's current state. This is useful for
3195 * drivers that subclass the connector state.
3198 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
3199 struct drm_connector_state *state)
3201 memcpy(state, connector->state, sizeof(*state));
3203 drm_connector_reference(connector);
3205 EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
3208 * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
3209 * @connector: drm connector
3211 * Default connector state duplicate hook for drivers which don't have their own
3212 * subclassed connector state structure.
3214 struct drm_connector_state *
3215 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
3217 struct drm_connector_state *state;
3219 if (WARN_ON(!connector->state))
3222 state = kmalloc(sizeof(*state), GFP_KERNEL);
3224 __drm_atomic_helper_connector_duplicate_state(connector, state);
3228 EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
3231 * drm_atomic_helper_duplicate_state - duplicate an atomic state object
3233 * @ctx: lock acquisition context
3235 * Makes a copy of the current atomic state by looping over all objects and
3236 * duplicating their respective states. This is used for example by suspend/
3237 * resume support code to save the state prior to suspend such that it can
3238 * be restored upon resume.
3240 * Note that this treats atomic state as persistent between save and restore.
3241 * Drivers must make sure that this is possible and won't result in confusion
3242 * or erroneous behaviour.
3244 * Note that if callers haven't already acquired all modeset locks this might
3245 * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
3248 * A pointer to the copy of the atomic state object on success or an
3249 * ERR_PTR()-encoded error code on failure.
3252 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
3254 struct drm_atomic_state *
3255 drm_atomic_helper_duplicate_state(struct drm_device *dev,
3256 struct drm_modeset_acquire_ctx *ctx)
3258 struct drm_atomic_state *state;
3259 struct drm_connector *conn;
3260 struct drm_connector_list_iter conn_iter;
3261 struct drm_plane *plane;
3262 struct drm_crtc *crtc;
3265 state = drm_atomic_state_alloc(dev);
3267 return ERR_PTR(-ENOMEM);
3269 state->acquire_ctx = ctx;
3271 drm_for_each_crtc(crtc, dev) {
3272 struct drm_crtc_state *crtc_state;
3274 crtc_state = drm_atomic_get_crtc_state(state, crtc);
3275 if (IS_ERR(crtc_state)) {
3276 err = PTR_ERR(crtc_state);
3281 drm_for_each_plane(plane, dev) {
3282 struct drm_plane_state *plane_state;
3284 plane_state = drm_atomic_get_plane_state(state, plane);
3285 if (IS_ERR(plane_state)) {
3286 err = PTR_ERR(plane_state);
3291 drm_connector_list_iter_get(dev, &conn_iter);
3292 drm_for_each_connector_iter(conn, &conn_iter) {
3293 struct drm_connector_state *conn_state;
3295 conn_state = drm_atomic_get_connector_state(state, conn);
3296 if (IS_ERR(conn_state)) {
3297 err = PTR_ERR(conn_state);
3298 drm_connector_list_iter_put(&conn_iter);
3302 drm_connector_list_iter_put(&conn_iter);
3304 /* clear the acquire context so that it isn't accidentally reused */
3305 state->acquire_ctx = NULL;
3309 drm_atomic_state_put(state);
3310 state = ERR_PTR(err);
3315 EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
3318 * __drm_atomic_helper_connector_destroy_state - release connector state
3319 * @state: connector state object to release
3321 * Releases all resources stored in the connector state without actually
3322 * freeing the memory of the connector state. This is useful for drivers that
3323 * subclass the connector state.
3326 __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state)
3329 * This is currently a placeholder so that drivers that subclass the
3330 * state will automatically do the right thing if code is ever added
3334 drm_connector_unreference(state->connector);
3336 EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
3339 * drm_atomic_helper_connector_destroy_state - default state destroy hook
3340 * @connector: drm connector
3341 * @state: connector state object to release
3343 * Default connector state destroy hook for drivers which don't have their own
3344 * subclassed connector state structure.
3346 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
3347 struct drm_connector_state *state)
3349 __drm_atomic_helper_connector_destroy_state(state);
3352 EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
3355 * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
3356 * @crtc: CRTC object
3357 * @red: red correction table
3358 * @green: green correction table
3359 * @blue: green correction table
3360 * @size: size of the tables
3362 * Implements support for legacy gamma correction table for drivers
3363 * that support color management through the DEGAMMA_LUT/GAMMA_LUT
3366 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
3367 u16 *red, u16 *green, u16 *blue,
3370 struct drm_device *dev = crtc->dev;
3371 struct drm_mode_config *config = &dev->mode_config;
3372 struct drm_atomic_state *state;
3373 struct drm_crtc_state *crtc_state;
3374 struct drm_property_blob *blob = NULL;
3375 struct drm_color_lut *blob_data;
3378 state = drm_atomic_state_alloc(crtc->dev);
3382 blob = drm_property_create_blob(dev,
3383 sizeof(struct drm_color_lut) * size,
3386 ret = PTR_ERR(blob);
3391 /* Prepare GAMMA_LUT with the legacy values. */
3392 blob_data = (struct drm_color_lut *) blob->data;
3393 for (i = 0; i < size; i++) {
3394 blob_data[i].red = red[i];
3395 blob_data[i].green = green[i];
3396 blob_data[i].blue = blue[i];
3399 state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
3401 crtc_state = drm_atomic_get_crtc_state(state, crtc);
3402 if (IS_ERR(crtc_state)) {
3403 ret = PTR_ERR(crtc_state);
3407 /* Reset DEGAMMA_LUT and CTM properties. */
3408 ret = drm_atomic_crtc_set_property(crtc, crtc_state,
3409 config->degamma_lut_property, 0);
3413 ret = drm_atomic_crtc_set_property(crtc, crtc_state,
3414 config->ctm_property, 0);
3418 ret = drm_atomic_crtc_set_property(crtc, crtc_state,
3419 config->gamma_lut_property, blob->base.id);
3423 ret = drm_atomic_commit(state);
3425 if (ret == -EDEADLK)
3428 drm_atomic_state_put(state);
3429 drm_property_unreference_blob(blob);
3433 drm_atomic_state_clear(state);
3434 drm_atomic_legacy_backoff(state);
3438 EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);