include/drm/drm_atomic_helper.h - kernel/bruno - Git at Google

 /*
  * 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>

 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);
 int drm_atomic_helper_commit(struct drm_device *dev,
 			     struct drm_atomic_state *state,
 			     bool async);

 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);
 void drm_atomic_helper_commit_planes(struct drm_device *dev,
 				     struct drm_atomic_state *state,
 				     bool active_only);
 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_swap_state(struct drm_device *dev,
 				  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);
 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_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_connector_dpms(struct drm_connector *connector,
 				     int mode);

 /* 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 *crtc,
 					    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 *plane,
 					     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);
 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 *connector,
 					    struct drm_connector_state *state);
 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 					  struct drm_connector_state *state);

 /**
  * 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 (for ->atomic_check()) see
  * drm_crtc_for_each_pending_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)
  * ->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_atomic_plane_disabling - check whether a plane is being disabled
  * @plane: plane object
  * @old_state: previous atomic 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 *plane,
 			   struct drm_plane_state *old_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((plane->state->crtc == NULL && plane->state->fb != NULL) ||
 		(plane->state->crtc != NULL && plane->state->fb == NULL));

 	/*
 	 * When using the transitional helpers, old_state may be NULL. If so,
 	 * we know nothing about the current state and have to assume that it
 	 * might be enabled.
 	 *
 	 * When using the atomic helpers, old_state won't be NULL. Therefore
 	 * this check assumes that either the driver will have reconstructed
 	 * the correct state in ->reset() or that the driver will have taken
 	 * appropriate measures to disable all planes.
 	 */
 	return (!old_state || old_state->crtc) && !plane->state->crtc;
 }

 #endif /* 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>

	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);
	int drm_atomic_helper_commit(struct drm_device *dev,
	struct drm_atomic_state *state,
	bool async);

	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);
	void drm_atomic_helper_commit_planes(struct drm_device *dev,
	struct drm_atomic_state *state,
	bool active_only);
	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_swap_state(struct drm_device *dev,
	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);
	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_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_connector_dpms(struct drm_connector *connector,
	int mode);

	/* 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 *crtc,
	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 *plane,
	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);
	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 *connector,
	struct drm_connector_state *state);
	void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
	struct drm_connector_state *state);

	/**
	* 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 (for ->atomic_check()) see
	* drm_crtc_for_each_pending_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)
	* ->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_atomic_plane_disabling - check whether a plane is being disabled
	* @plane: plane object
	* @old_state: previous atomic 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 *plane,
	struct drm_plane_state *old_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((plane->state->crtc == NULL && plane->state->fb != NULL) \|\|
	(plane->state->crtc != NULL && plane->state->fb == NULL));

	/*
	* When using the transitional helpers, old_state may be NULL. If so,
	* we know nothing about the current state and have to assume that it
	* might be enabled.
	*
	* When using the atomic helpers, old_state won't be NULL. Therefore
	* this check assumes that either the driver will have reconstructed
	* the correct state in ->reset() or that the driver will have taken
	* appropriate measures to disable all planes.
	*/
	return (!old_state \|\| old_state->crtc) && !plane->state->crtc;
	}

	#endif /* DRM_ATOMIC_HELPER_H_ */