2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
30 #include <drm/drm_atomic.h>
31 #include <drm/drm_plane_helper.h>
33 static void kfree_state(struct drm_atomic_state
*state
)
35 kfree(state
->connectors
);
36 kfree(state
->connector_states
);
38 kfree(state
->crtc_states
);
40 kfree(state
->plane_states
);
45 * drm_atomic_state_alloc - allocate atomic state
48 * This allocates an empty atomic state to track updates.
50 struct drm_atomic_state
*
51 drm_atomic_state_alloc(struct drm_device
*dev
)
53 struct drm_atomic_state
*state
;
55 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
59 state
->num_connector
= ACCESS_ONCE(dev
->mode_config
.num_connector
);
61 state
->crtcs
= kcalloc(dev
->mode_config
.num_crtc
,
62 sizeof(*state
->crtcs
), GFP_KERNEL
);
65 state
->crtc_states
= kcalloc(dev
->mode_config
.num_crtc
,
66 sizeof(*state
->crtc_states
), GFP_KERNEL
);
67 if (!state
->crtc_states
)
69 state
->planes
= kcalloc(dev
->mode_config
.num_total_plane
,
70 sizeof(*state
->planes
), GFP_KERNEL
);
73 state
->plane_states
= kcalloc(dev
->mode_config
.num_total_plane
,
74 sizeof(*state
->plane_states
), GFP_KERNEL
);
75 if (!state
->plane_states
)
77 state
->connectors
= kcalloc(state
->num_connector
,
78 sizeof(*state
->connectors
),
80 if (!state
->connectors
)
82 state
->connector_states
= kcalloc(state
->num_connector
,
83 sizeof(*state
->connector_states
),
85 if (!state
->connector_states
)
90 DRM_DEBUG_KMS("Allocate atomic state %p\n", state
);
98 EXPORT_SYMBOL(drm_atomic_state_alloc
);
101 * drm_atomic_state_clear - clear state object
102 * @state: atomic state
104 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
105 * all locks. So someone else could sneak in and change the current modeset
106 * configuration. Which means that all the state assembled in @state is no
107 * longer an atomic update to the current state, but to some arbitrary earlier
108 * state. Which could break assumptions the driver's ->atomic_check likely
111 * Hence we must clear all cached state and completely start over, using this
114 void drm_atomic_state_clear(struct drm_atomic_state
*state
)
116 struct drm_device
*dev
= state
->dev
;
117 struct drm_mode_config
*config
= &dev
->mode_config
;
120 DRM_DEBUG_KMS("Clearing atomic state %p\n", state
);
122 for (i
= 0; i
< state
->num_connector
; i
++) {
123 struct drm_connector
*connector
= state
->connectors
[i
];
128 WARN_ON(!drm_modeset_is_locked(&config
->connection_mutex
));
130 connector
->funcs
->atomic_destroy_state(connector
,
131 state
->connector_states
[i
]);
134 for (i
= 0; i
< config
->num_crtc
; i
++) {
135 struct drm_crtc
*crtc
= state
->crtcs
[i
];
140 crtc
->funcs
->atomic_destroy_state(crtc
,
141 state
->crtc_states
[i
]);
144 for (i
= 0; i
< config
->num_total_plane
; i
++) {
145 struct drm_plane
*plane
= state
->planes
[i
];
150 plane
->funcs
->atomic_destroy_state(plane
,
151 state
->plane_states
[i
]);
154 EXPORT_SYMBOL(drm_atomic_state_clear
);
157 * drm_atomic_state_free - free all memory for an atomic state
158 * @state: atomic state to deallocate
160 * This frees all memory associated with an atomic state, including all the
161 * per-object state for planes, crtcs and connectors.
163 void drm_atomic_state_free(struct drm_atomic_state
*state
)
165 drm_atomic_state_clear(state
);
167 DRM_DEBUG_KMS("Freeing atomic state %p\n", state
);
171 EXPORT_SYMBOL(drm_atomic_state_free
);
174 * drm_atomic_get_crtc_state - get crtc state
175 * @state: global atomic state object
176 * @crtc: crtc to get state object for
178 * This function returns the crtc state for the given crtc, allocating it if
179 * needed. It will also grab the relevant crtc lock to make sure that the state
184 * Either the allocated state or the error code encoded into the pointer. When
185 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
186 * entire atomic sequence must be restarted. All other errors are fatal.
188 struct drm_crtc_state
*
189 drm_atomic_get_crtc_state(struct drm_atomic_state
*state
,
190 struct drm_crtc
*crtc
)
193 struct drm_crtc_state
*crtc_state
;
195 index
= drm_crtc_index(crtc
);
197 if (state
->crtc_states
[index
])
198 return state
->crtc_states
[index
];
200 ret
= drm_modeset_lock(&crtc
->mutex
, state
->acquire_ctx
);
204 crtc_state
= crtc
->funcs
->atomic_duplicate_state(crtc
);
206 return ERR_PTR(-ENOMEM
);
208 state
->crtc_states
[index
] = crtc_state
;
209 state
->crtcs
[index
] = crtc
;
210 crtc_state
->state
= state
;
212 DRM_DEBUG_KMS("Added [CRTC:%d] %p state to %p\n",
213 crtc
->base
.id
, crtc_state
, state
);
217 EXPORT_SYMBOL(drm_atomic_get_crtc_state
);
220 * drm_atomic_crtc_set_property - set property on CRTC
221 * @crtc: the drm CRTC to set a property on
222 * @state: the state object to update with the new property value
223 * @property: the property to set
224 * @val: the new property value
226 * Use this instead of calling crtc->atomic_set_property directly.
227 * This function handles generic/core properties and calls out to
228 * driver's ->atomic_set_property() for driver properties. To ensure
229 * consistent behavior you must call this function rather than the
230 * driver hook directly.
233 * Zero on success, error code on failure
235 int drm_atomic_crtc_set_property(struct drm_crtc
*crtc
,
236 struct drm_crtc_state
*state
, struct drm_property
*property
,
239 if (crtc
->funcs
->atomic_set_property
)
240 return crtc
->funcs
->atomic_set_property(crtc
, state
, property
, val
);
243 EXPORT_SYMBOL(drm_atomic_crtc_set_property
);
246 * drm_atomic_crtc_get_property - get property on CRTC
247 * @crtc: the drm CRTC to get a property on
248 * @state: the state object with the property value to read
249 * @property: the property to get
250 * @val: the property value (returned by reference)
252 * Use this instead of calling crtc->atomic_get_property directly.
253 * This function handles generic/core properties and calls out to
254 * driver's ->atomic_get_property() for driver properties. To ensure
255 * consistent behavior you must call this function rather than the
256 * driver hook directly.
259 * Zero on success, error code on failure
261 int drm_atomic_crtc_get_property(struct drm_crtc
*crtc
,
262 const struct drm_crtc_state
*state
,
263 struct drm_property
*property
, uint64_t *val
)
265 if (crtc
->funcs
->atomic_get_property
)
266 return crtc
->funcs
->atomic_get_property(crtc
, state
, property
, val
);
269 EXPORT_SYMBOL(drm_atomic_crtc_get_property
);
272 * drm_atomic_crtc_check - check crtc state
273 * @crtc: crtc to check
274 * @state: crtc state to check
276 * Provides core sanity checks for crtc state.
279 * Zero on success, error code on failure
281 static int drm_atomic_crtc_check(struct drm_crtc
*crtc
,
282 struct drm_crtc_state
*state
)
284 /* NOTE: we explicitly don't enforce constraints such as primary
285 * layer covering entire screen, since that is something we want
286 * to allow (on hw that supports it). For hw that does not, it
287 * should be checked in driver's crtc->atomic_check() vfunc.
289 * TODO: Add generic modeset state checks once we support those.
295 * drm_atomic_get_plane_state - get plane state
296 * @state: global atomic state object
297 * @plane: plane to get state object for
299 * This function returns the plane state for the given plane, allocating it if
300 * needed. It will also grab the relevant plane lock to make sure that the state
305 * Either the allocated state or the error code encoded into the pointer. When
306 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
307 * entire atomic sequence must be restarted. All other errors are fatal.
309 struct drm_plane_state
*
310 drm_atomic_get_plane_state(struct drm_atomic_state
*state
,
311 struct drm_plane
*plane
)
314 struct drm_plane_state
*plane_state
;
316 index
= drm_plane_index(plane
);
318 if (state
->plane_states
[index
])
319 return state
->plane_states
[index
];
321 ret
= drm_modeset_lock(&plane
->mutex
, state
->acquire_ctx
);
325 plane_state
= plane
->funcs
->atomic_duplicate_state(plane
);
327 return ERR_PTR(-ENOMEM
);
329 state
->plane_states
[index
] = plane_state
;
330 state
->planes
[index
] = plane
;
331 plane_state
->state
= state
;
333 DRM_DEBUG_KMS("Added [PLANE:%d] %p state to %p\n",
334 plane
->base
.id
, plane_state
, state
);
336 if (plane_state
->crtc
) {
337 struct drm_crtc_state
*crtc_state
;
339 crtc_state
= drm_atomic_get_crtc_state(state
,
341 if (IS_ERR(crtc_state
))
342 return ERR_CAST(crtc_state
);
347 EXPORT_SYMBOL(drm_atomic_get_plane_state
);
350 * drm_atomic_plane_set_property - set property on plane
351 * @plane: the drm plane to set a property on
352 * @state: the state object to update with the new property value
353 * @property: the property to set
354 * @val: the new property value
356 * Use this instead of calling plane->atomic_set_property directly.
357 * This function handles generic/core properties and calls out to
358 * driver's ->atomic_set_property() for driver properties. To ensure
359 * consistent behavior you must call this function rather than the
360 * driver hook directly.
363 * Zero on success, error code on failure
365 int drm_atomic_plane_set_property(struct drm_plane
*plane
,
366 struct drm_plane_state
*state
, struct drm_property
*property
,
369 struct drm_device
*dev
= plane
->dev
;
370 struct drm_mode_config
*config
= &dev
->mode_config
;
372 if (property
== config
->prop_fb_id
) {
373 struct drm_framebuffer
*fb
= drm_framebuffer_lookup(dev
, val
);
374 drm_atomic_set_fb_for_plane(state
, fb
);
376 drm_framebuffer_unreference(fb
);
377 } else if (property
== config
->prop_crtc_id
) {
378 struct drm_crtc
*crtc
= drm_crtc_find(dev
, val
);
379 return drm_atomic_set_crtc_for_plane(state
, crtc
);
380 } else if (property
== config
->prop_crtc_x
) {
381 state
->crtc_x
= U642I64(val
);
382 } else if (property
== config
->prop_crtc_y
) {
383 state
->crtc_y
= U642I64(val
);
384 } else if (property
== config
->prop_crtc_w
) {
386 } else if (property
== config
->prop_crtc_h
) {
388 } else if (property
== config
->prop_src_x
) {
390 } else if (property
== config
->prop_src_y
) {
392 } else if (property
== config
->prop_src_w
) {
394 } else if (property
== config
->prop_src_h
) {
396 } else if (plane
->funcs
->atomic_set_property
) {
397 return plane
->funcs
->atomic_set_property(plane
, state
,
405 EXPORT_SYMBOL(drm_atomic_plane_set_property
);
408 * drm_atomic_plane_get_property - get property on plane
409 * @plane: the drm plane to get a property on
410 * @state: the state object with the property value to read
411 * @property: the property to get
412 * @val: the property value (returned by reference)
414 * Use this instead of calling plane->atomic_get_property directly.
415 * This function handles generic/core properties and calls out to
416 * driver's ->atomic_get_property() for driver properties. To ensure
417 * consistent behavior you must call this function rather than the
418 * driver hook directly.
421 * Zero on success, error code on failure
423 int drm_atomic_plane_get_property(struct drm_plane
*plane
,
424 const struct drm_plane_state
*state
,
425 struct drm_property
*property
, uint64_t *val
)
427 struct drm_device
*dev
= plane
->dev
;
428 struct drm_mode_config
*config
= &dev
->mode_config
;
430 if (property
== config
->prop_fb_id
) {
431 *val
= (state
->fb
) ? state
->fb
->base
.id
: 0;
432 } else if (property
== config
->prop_crtc_id
) {
433 *val
= (state
->crtc
) ? state
->crtc
->base
.id
: 0;
434 } else if (property
== config
->prop_crtc_x
) {
435 *val
= I642U64(state
->crtc_x
);
436 } else if (property
== config
->prop_crtc_y
) {
437 *val
= I642U64(state
->crtc_y
);
438 } else if (property
== config
->prop_crtc_w
) {
439 *val
= state
->crtc_w
;
440 } else if (property
== config
->prop_crtc_h
) {
441 *val
= state
->crtc_h
;
442 } else if (property
== config
->prop_src_x
) {
444 } else if (property
== config
->prop_src_y
) {
446 } else if (property
== config
->prop_src_w
) {
448 } else if (property
== config
->prop_src_h
) {
450 } else if (plane
->funcs
->atomic_get_property
) {
451 return plane
->funcs
->atomic_get_property(plane
, state
, property
, val
);
458 EXPORT_SYMBOL(drm_atomic_plane_get_property
);
461 * drm_atomic_plane_check - check plane state
462 * @plane: plane to check
463 * @state: plane state to check
465 * Provides core sanity checks for plane state.
468 * Zero on success, error code on failure
470 static int drm_atomic_plane_check(struct drm_plane
*plane
,
471 struct drm_plane_state
*state
)
473 unsigned int fb_width
, fb_height
;
476 /* either *both* CRTC and FB must be set, or neither */
477 if (WARN_ON(state
->crtc
&& !state
->fb
)) {
478 DRM_DEBUG_KMS("CRTC set but no FB\n");
480 } else if (WARN_ON(state
->fb
&& !state
->crtc
)) {
481 DRM_DEBUG_KMS("FB set but no CRTC\n");
485 /* if disabled, we don't care about the rest of the state: */
489 /* Check whether this plane is usable on this CRTC */
490 if (!(plane
->possible_crtcs
& drm_crtc_mask(state
->crtc
))) {
491 DRM_DEBUG_KMS("Invalid crtc for plane\n");
495 /* Check whether this plane supports the fb pixel format. */
496 for (i
= 0; i
< plane
->format_count
; i
++)
497 if (state
->fb
->pixel_format
== plane
->format_types
[i
])
499 if (i
== plane
->format_count
) {
500 DRM_DEBUG_KMS("Invalid pixel format %s\n",
501 drm_get_format_name(state
->fb
->pixel_format
));
505 /* Give drivers some help against integer overflows */
506 if (state
->crtc_w
> INT_MAX
||
507 state
->crtc_x
> INT_MAX
- (int32_t) state
->crtc_w
||
508 state
->crtc_h
> INT_MAX
||
509 state
->crtc_y
> INT_MAX
- (int32_t) state
->crtc_h
) {
510 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
511 state
->crtc_w
, state
->crtc_h
,
512 state
->crtc_x
, state
->crtc_y
);
516 fb_width
= state
->fb
->width
<< 16;
517 fb_height
= state
->fb
->height
<< 16;
519 /* Make sure source coordinates are inside the fb. */
520 if (state
->src_w
> fb_width
||
521 state
->src_x
> fb_width
- state
->src_w
||
522 state
->src_h
> fb_height
||
523 state
->src_y
> fb_height
- state
->src_h
) {
524 DRM_DEBUG_KMS("Invalid source coordinates "
525 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
526 state
->src_w
>> 16, ((state
->src_w
& 0xffff) * 15625) >> 10,
527 state
->src_h
>> 16, ((state
->src_h
& 0xffff) * 15625) >> 10,
528 state
->src_x
>> 16, ((state
->src_x
& 0xffff) * 15625) >> 10,
529 state
->src_y
>> 16, ((state
->src_y
& 0xffff) * 15625) >> 10);
537 * drm_atomic_get_connector_state - get connector state
538 * @state: global atomic state object
539 * @connector: connector to get state object for
541 * This function returns the connector state for the given connector,
542 * allocating it if needed. It will also grab the relevant connector lock to
543 * make sure that the state is consistent.
547 * Either the allocated state or the error code encoded into the pointer. When
548 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
549 * entire atomic sequence must be restarted. All other errors are fatal.
551 struct drm_connector_state
*
552 drm_atomic_get_connector_state(struct drm_atomic_state
*state
,
553 struct drm_connector
*connector
)
556 struct drm_mode_config
*config
= &connector
->dev
->mode_config
;
557 struct drm_connector_state
*connector_state
;
559 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
563 index
= drm_connector_index(connector
);
566 * Construction of atomic state updates can race with a connector
567 * hot-add which might overflow. In this case flip the table and just
568 * restart the entire ioctl - no one is fast enough to livelock a cpu
569 * with physical hotplug events anyway.
571 * Note that we only grab the indexes once we have the right lock to
572 * prevent hotplug/unplugging of connectors. So removal is no problem,
573 * at most the array is a bit too large.
575 if (index
>= state
->num_connector
) {
576 DRM_DEBUG_KMS("Hot-added connector would overflow state array, restarting\n");
577 return ERR_PTR(-EAGAIN
);
580 if (state
->connector_states
[index
])
581 return state
->connector_states
[index
];
583 connector_state
= connector
->funcs
->atomic_duplicate_state(connector
);
584 if (!connector_state
)
585 return ERR_PTR(-ENOMEM
);
587 state
->connector_states
[index
] = connector_state
;
588 state
->connectors
[index
] = connector
;
589 connector_state
->state
= state
;
591 DRM_DEBUG_KMS("Added [CONNECTOR:%d] %p state to %p\n",
592 connector
->base
.id
, connector_state
, state
);
594 if (connector_state
->crtc
) {
595 struct drm_crtc_state
*crtc_state
;
597 crtc_state
= drm_atomic_get_crtc_state(state
,
598 connector_state
->crtc
);
599 if (IS_ERR(crtc_state
))
600 return ERR_CAST(crtc_state
);
603 return connector_state
;
605 EXPORT_SYMBOL(drm_atomic_get_connector_state
);
608 * drm_atomic_connector_set_property - set property on connector.
609 * @connector: the drm connector to set a property on
610 * @state: the state object to update with the new property value
611 * @property: the property to set
612 * @val: the new property value
614 * Use this instead of calling connector->atomic_set_property directly.
615 * This function handles generic/core properties and calls out to
616 * driver's ->atomic_set_property() for driver properties. To ensure
617 * consistent behavior you must call this function rather than the
618 * driver hook directly.
621 * Zero on success, error code on failure
623 int drm_atomic_connector_set_property(struct drm_connector
*connector
,
624 struct drm_connector_state
*state
, struct drm_property
*property
,
627 struct drm_device
*dev
= connector
->dev
;
628 struct drm_mode_config
*config
= &dev
->mode_config
;
630 if (property
== config
->dpms_property
) {
631 /* setting DPMS property requires special handling, which
632 * is done in legacy setprop path for us. Disallow (for
633 * now?) atomic writes to DPMS property:
636 } else if (connector
->funcs
->atomic_set_property
) {
637 return connector
->funcs
->atomic_set_property(connector
,
638 state
, property
, val
);
643 EXPORT_SYMBOL(drm_atomic_connector_set_property
);
646 * drm_atomic_connector_get_property - get property on connector
647 * @connector: the drm connector to get a property on
648 * @state: the state object with the property value to read
649 * @property: the property to get
650 * @val: the property value (returned by reference)
652 * Use this instead of calling connector->atomic_get_property directly.
653 * This function handles generic/core properties and calls out to
654 * driver's ->atomic_get_property() for driver properties. To ensure
655 * consistent behavior you must call this function rather than the
656 * driver hook directly.
659 * Zero on success, error code on failure
661 int drm_atomic_connector_get_property(struct drm_connector
*connector
,
662 const struct drm_connector_state
*state
,
663 struct drm_property
*property
, uint64_t *val
)
665 struct drm_device
*dev
= connector
->dev
;
666 struct drm_mode_config
*config
= &dev
->mode_config
;
668 if (property
== config
->dpms_property
) {
669 *val
= connector
->dpms
;
670 } else if (connector
->funcs
->atomic_get_property
) {
671 return connector
->funcs
->atomic_get_property(connector
,
672 state
, property
, val
);
679 EXPORT_SYMBOL(drm_atomic_connector_get_property
);
682 * drm_atomic_get_property - helper to read atomic property
683 * @obj: drm mode object whose property to read
684 * @property: the property to read
685 * @val: the read value, returned by reference
688 * Zero on success, error code on failure
690 int drm_atomic_get_property(struct drm_mode_object
*obj
,
691 struct drm_property
*property
, uint64_t *val
)
693 struct drm_device
*dev
= property
->dev
;
697 case DRM_MODE_OBJECT_CONNECTOR
: {
698 struct drm_connector
*connector
= obj_to_connector(obj
);
699 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
700 ret
= drm_atomic_connector_get_property(connector
,
701 connector
->state
, property
, val
);
704 case DRM_MODE_OBJECT_CRTC
: {
705 struct drm_crtc
*crtc
= obj_to_crtc(obj
);
706 WARN_ON(!drm_modeset_is_locked(&crtc
->mutex
));
707 ret
= drm_atomic_crtc_get_property(crtc
,
708 crtc
->state
, property
, val
);
711 case DRM_MODE_OBJECT_PLANE
: {
712 struct drm_plane
*plane
= obj_to_plane(obj
);
713 WARN_ON(!drm_modeset_is_locked(&plane
->mutex
));
714 ret
= drm_atomic_plane_get_property(plane
,
715 plane
->state
, property
, val
);
727 * drm_atomic_set_crtc_for_plane - set crtc for plane
728 * @plane_state: the plane whose incoming state to update
729 * @crtc: crtc to use for the plane
731 * Changing the assigned crtc for a plane requires us to grab the lock and state
732 * for the new crtc, as needed. This function takes care of all these details
733 * besides updating the pointer in the state object itself.
736 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
737 * then the w/w mutex code has detected a deadlock and the entire atomic
738 * sequence must be restarted. All other errors are fatal.
741 drm_atomic_set_crtc_for_plane(struct drm_plane_state
*plane_state
,
742 struct drm_crtc
*crtc
)
744 struct drm_plane
*plane
= plane_state
->plane
;
745 struct drm_crtc_state
*crtc_state
;
747 if (plane_state
->crtc
) {
748 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
750 if (WARN_ON(IS_ERR(crtc_state
)))
751 return PTR_ERR(crtc_state
);
753 crtc_state
->plane_mask
&= ~(1 << drm_plane_index(plane
));
756 plane_state
->crtc
= crtc
;
759 crtc_state
= drm_atomic_get_crtc_state(plane_state
->state
,
761 if (IS_ERR(crtc_state
))
762 return PTR_ERR(crtc_state
);
763 crtc_state
->plane_mask
|= (1 << drm_plane_index(plane
));
767 DRM_DEBUG_KMS("Link plane state %p to [CRTC:%d]\n",
768 plane_state
, crtc
->base
.id
);
770 DRM_DEBUG_KMS("Link plane state %p to [NOCRTC]\n", plane_state
);
774 EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane
);
777 * drm_atomic_set_fb_for_plane - set crtc for plane
778 * @plane_state: atomic state object for the plane
779 * @fb: fb to use for the plane
781 * Changing the assigned framebuffer for a plane requires us to grab a reference
782 * to the new fb and drop the reference to the old fb, if there is one. This
783 * function takes care of all these details besides updating the pointer in the
784 * state object itself.
787 drm_atomic_set_fb_for_plane(struct drm_plane_state
*plane_state
,
788 struct drm_framebuffer
*fb
)
791 drm_framebuffer_unreference(plane_state
->fb
);
793 drm_framebuffer_reference(fb
);
794 plane_state
->fb
= fb
;
797 DRM_DEBUG_KMS("Set [FB:%d] for plane state %p\n",
798 fb
->base
.id
, plane_state
);
800 DRM_DEBUG_KMS("Set [NOFB] for plane state %p\n", plane_state
);
802 EXPORT_SYMBOL(drm_atomic_set_fb_for_plane
);
805 * drm_atomic_set_crtc_for_connector - set crtc for connector
806 * @conn_state: atomic state object for the connector
807 * @crtc: crtc to use for the connector
809 * Changing the assigned crtc for a connector requires us to grab the lock and
810 * state for the new crtc, as needed. This function takes care of all these
811 * details besides updating the pointer in the state object itself.
814 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
815 * then the w/w mutex code has detected a deadlock and the entire atomic
816 * sequence must be restarted. All other errors are fatal.
819 drm_atomic_set_crtc_for_connector(struct drm_connector_state
*conn_state
,
820 struct drm_crtc
*crtc
)
822 struct drm_crtc_state
*crtc_state
;
825 crtc_state
= drm_atomic_get_crtc_state(conn_state
->state
, crtc
);
826 if (IS_ERR(crtc_state
))
827 return PTR_ERR(crtc_state
);
830 conn_state
->crtc
= crtc
;
833 DRM_DEBUG_KMS("Link connector state %p to [CRTC:%d]\n",
834 conn_state
, crtc
->base
.id
);
836 DRM_DEBUG_KMS("Link connector state %p to [NOCRTC]\n",
841 EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector
);
844 * drm_atomic_add_affected_connectors - add connectors for crtc
845 * @state: atomic state
848 * This function walks the current configuration and adds all connectors
849 * currently using @crtc to the atomic configuration @state. Note that this
850 * function must acquire the connection mutex. This can potentially cause
851 * unneeded seralization if the update is just for the planes on one crtc. Hence
852 * drivers and helpers should only call this when really needed (e.g. when a
853 * full modeset needs to happen due to some change).
856 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
857 * then the w/w mutex code has detected a deadlock and the entire atomic
858 * sequence must be restarted. All other errors are fatal.
861 drm_atomic_add_affected_connectors(struct drm_atomic_state
*state
,
862 struct drm_crtc
*crtc
)
864 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
865 struct drm_connector
*connector
;
866 struct drm_connector_state
*conn_state
;
869 ret
= drm_modeset_lock(&config
->connection_mutex
, state
->acquire_ctx
);
873 DRM_DEBUG_KMS("Adding all current connectors for [CRTC:%d] to %p\n",
874 crtc
->base
.id
, state
);
877 * Changed connectors are already in @state, so only need to look at the
878 * current configuration.
880 list_for_each_entry(connector
, &config
->connector_list
, head
) {
881 if (connector
->state
->crtc
!= crtc
)
884 conn_state
= drm_atomic_get_connector_state(state
, connector
);
885 if (IS_ERR(conn_state
))
886 return PTR_ERR(conn_state
);
891 EXPORT_SYMBOL(drm_atomic_add_affected_connectors
);
894 * drm_atomic_connectors_for_crtc - count number of connected outputs
895 * @state: atomic state
898 * This function counts all connectors which will be connected to @crtc
899 * according to @state. Useful to recompute the enable state for @crtc.
902 drm_atomic_connectors_for_crtc(struct drm_atomic_state
*state
,
903 struct drm_crtc
*crtc
)
905 int i
, num_connected_connectors
= 0;
907 for (i
= 0; i
< state
->num_connector
; i
++) {
908 struct drm_connector_state
*conn_state
;
910 conn_state
= state
->connector_states
[i
];
912 if (conn_state
&& conn_state
->crtc
== crtc
)
913 num_connected_connectors
++;
916 DRM_DEBUG_KMS("State %p has %i connectors for [CRTC:%d]\n",
917 state
, num_connected_connectors
, crtc
->base
.id
);
919 return num_connected_connectors
;
921 EXPORT_SYMBOL(drm_atomic_connectors_for_crtc
);
924 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
925 * @state: atomic state
927 * This function should be used by legacy entry points which don't understand
928 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
929 * the slowpath completed.
931 void drm_atomic_legacy_backoff(struct drm_atomic_state
*state
)
936 drm_modeset_backoff(state
->acquire_ctx
);
938 ret
= drm_modeset_lock(&state
->dev
->mode_config
.connection_mutex
,
942 ret
= drm_modeset_lock_all_crtcs(state
->dev
,
947 EXPORT_SYMBOL(drm_atomic_legacy_backoff
);
950 * drm_atomic_check_only - check whether a given config would work
951 * @state: atomic configuration to check
953 * Note that this function can return -EDEADLK if the driver needed to acquire
954 * more locks but encountered a deadlock. The caller must then do the usual w/w
955 * backoff dance and restart. All other errors are fatal.
958 * 0 on success, negative error code on failure.
960 int drm_atomic_check_only(struct drm_atomic_state
*state
)
962 struct drm_device
*dev
= state
->dev
;
963 struct drm_mode_config
*config
= &dev
->mode_config
;
964 int nplanes
= config
->num_total_plane
;
965 int ncrtcs
= config
->num_crtc
;
968 DRM_DEBUG_KMS("checking %p\n", state
);
970 for (i
= 0; i
< nplanes
; i
++) {
971 struct drm_plane
*plane
= state
->planes
[i
];
976 ret
= drm_atomic_plane_check(plane
, state
->plane_states
[i
]);
978 DRM_DEBUG_KMS("[PLANE:%d] atomic core check failed\n",
984 for (i
= 0; i
< ncrtcs
; i
++) {
985 struct drm_crtc
*crtc
= state
->crtcs
[i
];
990 ret
= drm_atomic_crtc_check(crtc
, state
->crtc_states
[i
]);
992 DRM_DEBUG_KMS("[CRTC:%d] atomic core check failed\n",
998 if (config
->funcs
->atomic_check
)
999 ret
= config
->funcs
->atomic_check(state
->dev
, state
);
1003 EXPORT_SYMBOL(drm_atomic_check_only
);
1006 * drm_atomic_commit - commit configuration atomically
1007 * @state: atomic configuration to check
1009 * Note that this function can return -EDEADLK if the driver needed to acquire
1010 * more locks but encountered a deadlock. The caller must then do the usual w/w
1011 * backoff dance and restart. All other errors are fatal.
1013 * Also note that on successful execution ownership of @state is transferred
1014 * from the caller of this function to the function itself. The caller must not
1015 * free or in any other way access @state. If the function fails then the caller
1016 * must clean up @state itself.
1019 * 0 on success, negative error code on failure.
1021 int drm_atomic_commit(struct drm_atomic_state
*state
)
1023 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1026 ret
= drm_atomic_check_only(state
);
1030 DRM_DEBUG_KMS("commiting %p\n", state
);
1032 return config
->funcs
->atomic_commit(state
->dev
, state
, false);
1034 EXPORT_SYMBOL(drm_atomic_commit
);
1037 * drm_atomic_async_commit - atomic&async configuration commit
1038 * @state: atomic configuration to check
1040 * Note that this function can return -EDEADLK if the driver needed to acquire
1041 * more locks but encountered a deadlock. The caller must then do the usual w/w
1042 * backoff dance and restart. All other errors are fatal.
1044 * Also note that on successful execution ownership of @state is transferred
1045 * from the caller of this function to the function itself. The caller must not
1046 * free or in any other way access @state. If the function fails then the caller
1047 * must clean up @state itself.
1050 * 0 on success, negative error code on failure.
1052 int drm_atomic_async_commit(struct drm_atomic_state
*state
)
1054 struct drm_mode_config
*config
= &state
->dev
->mode_config
;
1057 ret
= drm_atomic_check_only(state
);
1061 DRM_DEBUG_KMS("commiting %p asynchronously\n", state
);
1063 return config
->funcs
->atomic_commit(state
->dev
, state
, true);
1065 EXPORT_SYMBOL(drm_atomic_async_commit
);