[mirror_ubuntu-artful-kernel.git] / include / drm / drm_atomic_helper.h

/*
 * Copyright (C) 2014 Red Hat
 * Copyright (C) 2014 Intel Corp.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 * Rob Clark <robdclark@gmail.com>
 * Daniel Vetter <daniel.vetter@ffwll.ch>
 */

#ifndef DRM_ATOMIC_HELPER_H_
#define DRM_ATOMIC_HELPER_H_

#include <drm/drm_crtc.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_modeset_helper.h>

struct drm_atomic_state;

int drm_atomic_helper_check_modeset(struct drm_device *dev,
				struct drm_atomic_state *state);
int drm_atomic_helper_check_planes(struct drm_device *dev,
			       struct drm_atomic_state *state);
int drm_atomic_helper_check(struct drm_device *dev,
			    struct drm_atomic_state *state);
void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
int drm_atomic_helper_commit(struct drm_device *dev,
			     struct drm_atomic_state *state,
			     bool nonblock);

int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
					struct drm_atomic_state *state,
					bool pre_swap);

void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
					struct drm_atomic_state *old_state);

void
drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
					      struct drm_atomic_state *old_state);

void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
					       struct drm_atomic_state *state);
void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
					  struct drm_atomic_state *old_state);

int drm_atomic_helper_prepare_planes(struct drm_device *dev,
				     struct drm_atomic_state *state);

#define DRM_PLANE_COMMIT_ACTIVE_ONLY			BIT(0)
#define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET	BIT(1)

void drm_atomic_helper_commit_planes(struct drm_device *dev,
				     struct drm_atomic_state *state,
				     uint32_t flags);
void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
				      struct drm_atomic_state *old_state);
void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
void
drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
					 bool atomic);

void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
				  bool stall);

/* nonblocking commit helpers */
int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
				   bool nonblock);
void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);

/* implementations for legacy interfaces */
int drm_atomic_helper_update_plane(struct drm_plane *plane,
				   struct drm_crtc *crtc,
				   struct drm_framebuffer *fb,
				   int crtc_x, int crtc_y,
				   unsigned int crtc_w, unsigned int crtc_h,
				   uint32_t src_x, uint32_t src_y,
				   uint32_t src_w, uint32_t src_h,
				   struct drm_modeset_acquire_ctx *ctx);
int drm_atomic_helper_disable_plane(struct drm_plane *plane);
int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
		struct drm_plane_state *plane_state);
int drm_atomic_helper_set_config(struct drm_mode_set *set);
int __drm_atomic_helper_set_config(struct drm_mode_set *set,
		struct drm_atomic_state *state);

int drm_atomic_helper_disable_all(struct drm_device *dev,
				  struct drm_modeset_acquire_ctx *ctx);
void drm_atomic_helper_shutdown(struct drm_device *dev);
struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
					      struct drm_modeset_acquire_ctx *ctx);
int drm_atomic_helper_resume(struct drm_device *dev,
			     struct drm_atomic_state *state);

int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
					struct drm_property *property,
					uint64_t val);
int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
					struct drm_property *property,
					uint64_t val);
int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
					struct drm_property *property,
					uint64_t val);
int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
				struct drm_framebuffer *fb,
				struct drm_pending_vblank_event *event,
				uint32_t flags);
int drm_atomic_helper_page_flip_target(
				struct drm_crtc *crtc,
				struct drm_framebuffer *fb,
				struct drm_pending_vblank_event *event,
				uint32_t flags,
				uint32_t target);
int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
				     int mode);
struct drm_encoder *
drm_atomic_helper_best_encoder(struct drm_connector *connector);

/* default implementations for state handling */
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
					      struct drm_crtc_state *state);
struct drm_crtc_state *
drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
					  struct drm_crtc_state *state);

void drm_atomic_helper_plane_reset(struct drm_plane *plane);
void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
					       struct drm_plane_state *state);
struct drm_plane_state *
drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
					  struct drm_plane_state *state);

void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
					 struct drm_connector_state *conn_state);
void drm_atomic_helper_connector_reset(struct drm_connector *connector);
void
__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
					   struct drm_connector_state *state);
struct drm_connector_state *
drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
struct drm_atomic_state *
drm_atomic_helper_duplicate_state(struct drm_device *dev,
				  struct drm_modeset_acquire_ctx *ctx);
void
__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
					  struct drm_connector_state *state);
int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
				       u16 *red, u16 *green, u16 *blue,
				       uint32_t size);

/**
 * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 * @plane: the loop cursor
 * @crtc:  the crtc whose planes are iterated
 *
 * This iterates over the current state, useful (for example) when applying
 * atomic state after it has been checked and swapped.  To iterate over the
 * planes which *will* be attached (more useful in code called from
 * &drm_mode_config_funcs.atomic_check) see
 * drm_atomic_crtc_state_for_each_plane().
 */
#define drm_atomic_crtc_for_each_plane(plane, crtc) \
	drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)

/**
 * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
 * @plane: the loop cursor
 * @crtc_state: the incoming crtc-state
 *
 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 * attached if the specified state is applied.  Useful during for example
 * in code called from &drm_mode_config_funcs.atomic_check operations, to
 * validate the incoming state.
 */
#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)

/**
 * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
 * @plane: the loop cursor
 * @plane_state: loop cursor for the plane's state, must be const
 * @crtc_state: the incoming crtc-state
 *
 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 * attached if the specified state is applied.  Useful during for example
 * in code called from &drm_mode_config_funcs.atomic_check operations, to
 * validate the incoming state.
 *
 * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
 * const plane_state. This is useful when a driver just wants to peek at other
 * active planes on this crtc, but does not need to change it.
 */
#define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
		for_each_if ((plane_state = \
			      __drm_atomic_get_current_plane_state((crtc_state)->state, \
								   plane)))

/**
 * drm_atomic_plane_disabling - check whether a plane is being disabled
 * @old_plane_state: old atomic plane state
 * @new_plane_state: new atomic plane state
 *
 * Checks the atomic state of a plane to determine whether it's being disabled
 * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 * need to either both be NULL or both be non-NULL).
 *
 * RETURNS:
 * True if the plane is being disabled, false otherwise.
 */
static inline bool
drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
			   struct drm_plane_state *new_plane_state)
{
	/*
	 * When disabling a plane, CRTC and FB should always be NULL together.
	 * Anything else should be considered a bug in the atomic core, so we
	 * gently warn about it.
	 */
	WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
		(new_plane_state->crtc != NULL && new_plane_state->fb == NULL));

	return old_plane_state->crtc && !new_plane_state->crtc;
}

#endif /* DRM_ATOMIC_HELPER_H_ */
Commit	Line	Data
c2fcd274 DV	1	/*
	2	* Copyright (C) 2014 Red Hat
	3	* Copyright (C) 2014 Intel Corp.
	4	*
	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:
	11	*
	12	* The above copyright notice and this permission notice shall be included in
	13	* all copies or substantial portions of the Software.
	14	*
	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.
	22	*
	23	* Authors:
	24	* Rob Clark <robdclark@gmail.com>
	25	* Daniel Vetter <daniel.vetter@ffwll.ch>
	26	*/
	27
	28	#ifndef DRM_ATOMIC_HELPER_H_
	29	#define DRM_ATOMIC_HELPER_H_
	30
0254951d	31	#include <drm/drm_crtc.h>
1de72faf DV	32	#include <drm/drm_modeset_helper_vtables.h>
1de72faf DV	33	#include <drm/drm_modeset_helper.h>
0254951d	34
bbb1e524 RC	35	struct drm_atomic_state;
bbb1e524 RC	36
d9b13620 DV	37	int drm_atomic_helper_check_modeset(struct drm_device *dev,
	38	struct drm_atomic_state *state);
	39	int drm_atomic_helper_check_planes(struct drm_device *dev,
	40	struct drm_atomic_state *state);
c2fcd274 DV	41	int drm_atomic_helper_check(struct drm_device *dev,
c2fcd274 DV	42	struct drm_atomic_state *state);
9f2a7950	43	void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
623369e5 DV	44	int drm_atomic_helper_commit(struct drm_device *dev,
623369e5 DV	45	struct drm_atomic_state *state,
286dbb8d	46	bool nonblock);
623369e5	47
f6ce410a GP	48	int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
	49	struct drm_atomic_state *state,
	50	bool pre_swap);
c240906d	51
5ee3229c RC	52	void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
	53	struct drm_atomic_state *old_state);
	54
4c18d301 DV	55	void
	56	drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
	57	struct drm_atomic_state *old_state);
	58
1af434a9 DV	59	void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
	60	struct drm_atomic_state *state);
	61	void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
623369e5	62	struct drm_atomic_state *old_state);
c2fcd274 DV	63
	64	int drm_atomic_helper_prepare_planes(struct drm_device *dev,
	65	struct drm_atomic_state *state);
2b58e98d LY	66
	67	#define DRM_PLANE_COMMIT_ACTIVE_ONLY BIT(0)
	68	#define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET BIT(1)
	69
c2fcd274	70	void drm_atomic_helper_commit_planes(struct drm_device *dev,
aef9dbb8	71	struct drm_atomic_state *state,
2b58e98d	72	uint32_t flags);
c2fcd274 DV	73	void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
c2fcd274 DV	74	struct drm_atomic_state *old_state);
de28d021	75	void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
28500291 LY	76	void
	77	drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
	78	bool atomic);
c2fcd274	79
5e84c269 DV	80	void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
5e84c269 DV	81	bool stall);
c2fcd274	82
a095caa7 DV	83	/* nonblocking commit helpers */
	84	int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
	85	bool nonblock);
	86	void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
	87	void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
	88	void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
	89
042652ed DV	90	/* implementations for legacy interfaces */
	91	int drm_atomic_helper_update_plane(struct drm_plane *plane,
	92	struct drm_crtc *crtc,
	93	struct drm_framebuffer *fb,
	94	int crtc_x, int crtc_y,
	95	unsigned int crtc_w, unsigned int crtc_h,
	96	uint32_t src_x, uint32_t src_y,
34a2ab5e DV	97	uint32_t src_w, uint32_t src_h,
34a2ab5e DV	98	struct drm_modeset_acquire_ctx *ctx);
042652ed	99	int drm_atomic_helper_disable_plane(struct drm_plane *plane);
bbb1e524 RC	100	int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
bbb1e524 RC	101	struct drm_plane_state *plane_state);
042652ed	102	int drm_atomic_helper_set_config(struct drm_mode_set *set);
bbb1e524 RC	103	int __drm_atomic_helper_set_config(struct drm_mode_set *set,
bbb1e524 RC	104	struct drm_atomic_state *state);
042652ed	105
14942760 TR	106	int drm_atomic_helper_disable_all(struct drm_device *dev,
14942760 TR	107	struct drm_modeset_acquire_ctx *ctx);
18dddadc	108	void drm_atomic_helper_shutdown(struct drm_device *dev);
14942760	109	struct drm_atomic_state drm_atomic_helper_suspend(struct drm_device dev);
581e49fe ML	110	int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
581e49fe ML	111	struct drm_modeset_acquire_ctx *ctx);
14942760 TR	112	int drm_atomic_helper_resume(struct drm_device *dev,
	113	struct drm_atomic_state *state);
	114
042652ed DV	115	int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
	116	struct drm_property *property,
	117	uint64_t val);
	118	int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
	119	struct drm_property *property,
	120	uint64_t val);
	121	int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
	122	struct drm_property *property,
	123	uint64_t val);
8bc0f312 DV	124	int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
	125	struct drm_framebuffer *fb,
	126	struct drm_pending_vblank_event *event,
	127	uint32_t flags);
f869a6ec AG	128	int drm_atomic_helper_page_flip_target(
	129	struct drm_crtc *crtc,
	130	struct drm_framebuffer *fb,
	131	struct drm_pending_vblank_event *event,
	132	uint32_t flags,
	133	uint32_t target);
9a69a9ac ML	134	int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
9a69a9ac ML	135	int mode);
9ecb5498 NT	136	struct drm_encoder *
9ecb5498 NT	137	drm_atomic_helper_best_encoder(struct drm_connector *connector);
8bc0f312	138
d461701c DV	139	/* default implementations for state handling */
d461701c DV	140	void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
f5e7840b TR	141	void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
f5e7840b TR	142	struct drm_crtc_state *state);
d461701c DV	143	struct drm_crtc_state *
d461701c DV	144	drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
ec2dc6a0	145	void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
d461701c DV	146	void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
	147	struct drm_crtc_state *state);
	148
	149	void drm_atomic_helper_plane_reset(struct drm_plane *plane);
f5e7840b TR	150	void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
f5e7840b TR	151	struct drm_plane_state *state);
d461701c DV	152	struct drm_plane_state *
d461701c DV	153	drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
2f701695	154	void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
d461701c DV	155	void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
	156	struct drm_plane_state *state);
	157
4cd39917 ML	158	void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
4cd39917 ML	159	struct drm_connector_state *conn_state);
d461701c	160	void drm_atomic_helper_connector_reset(struct drm_connector *connector);
f5e7840b TR	161	void
	162	__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
	163	struct drm_connector_state *state);
d461701c DV	164	struct drm_connector_state *
d461701c DV	165	drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
397fd77c TR	166	struct drm_atomic_state *
	167	drm_atomic_helper_duplicate_state(struct drm_device *dev,
	168	struct drm_modeset_acquire_ctx *ctx);
f5e7840b	169	void
fabd9106	170	__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
d461701c DV	171	void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
d461701c DV	172	struct drm_connector_state *state);
7ea77283 ML	173	int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
	174	u16 red, u16 green, u16 *blue,
	175	uint32_t size);
d461701c	176
dd275956 RC	177	/**
	178	* drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
	179	* @plane: the loop cursor
	180	* @crtc: the crtc whose planes are iterated
	181	*
	182	* This iterates over the current state, useful (for example) when applying
	183	* atomic state after it has been checked and swapped. To iterate over the
6806cdf9 DV	184	* planes which will be attached (more useful in code called from
6806cdf9 DV	185	* &drm_mode_config_funcs.atomic_check) see
5c0be3f1	186	* drm_atomic_crtc_state_for_each_plane().
dd275956 RC	187	*/
	188	#define drm_atomic_crtc_for_each_plane(plane, crtc) \
	189	drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
	190
	191	/**
	192	* drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
	193	* @plane: the loop cursor
	194	* @crtc_state: the incoming crtc-state
	195	*
	196	* Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
6806cdf9 DV	197	* attached if the specified state is applied. Useful during for example
	198	* in code called from &drm_mode_config_funcs.atomic_check operations, to
	199	* validate the incoming state.
dd275956 RC	200	*/
	201	#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
	202	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
042652ed	203
2f196b7c DV	204	/**
	205	* drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
	206	* @plane: the loop cursor
	207	* @plane_state: loop cursor for the plane's state, must be const
	208	* @crtc_state: the incoming crtc-state
	209	*
	210	* Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
6806cdf9 DV	211	* attached if the specified state is applied. Useful during for example
	212	* in code called from &drm_mode_config_funcs.atomic_check operations, to
	213	* validate the incoming state.
2f196b7c DV	214	*
	215	* Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
	216	* const plane_state. This is useful when a driver just wants to peek at other
	217	* active planes on this crtc, but does not need to change it.
	218	*/
	219	#define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
	220	drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
	221	for_each_if ((plane_state = \
	222	__drm_atomic_get_current_plane_state((crtc_state)->state, \
	223	plane)))
	224
51ffa12d	225	/**
407b8bd9	226	* drm_atomic_plane_disabling - check whether a plane is being disabled
51ffa12d ML	227	* @old_plane_state: old atomic plane state
51ffa12d ML	228	* @new_plane_state: new atomic plane state
407b8bd9 TR	229	*
	230	* Checks the atomic state of a plane to determine whether it's being disabled
	231	* or not. This also WARNs if it detects an invalid state (both CRTC and FB
	232	* need to either both be NULL or both be non-NULL).
	233	*
	234	* RETURNS:
	235	* True if the plane is being disabled, false otherwise.
	236	*/
	237	static inline bool
51ffa12d ML	238	drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
51ffa12d ML	239	struct drm_plane_state *new_plane_state)
407b8bd9 TR	240	{
	241	/*
	242	* When disabling a plane, CRTC and FB should always be NULL together.
	243	* Anything else should be considered a bug in the atomic core, so we
	244	* gently warn about it.
	245	*/
51ffa12d ML	246	WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) \|\|
51ffa12d ML	247	(new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
407b8bd9	248
51ffa12d	249	return old_plane_state->crtc && !new_plane_state->crtc;
407b8bd9 TR	250	}
407b8bd9 TR	251
c2fcd274	252	#endif /* DRM_ATOMIC_HELPER_H_ */