[thirdparty/kernel/stable.git] / drivers / gpu / drm / i915 / intel_frontbuffer.h

/*
 * Copyright (c) 2014-2016 Intel Corporation
 *
 * 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
 */

#ifndef __INTEL_FRONTBUFFER_H__
#define __INTEL_FRONTBUFFER_H__

#include "i915_gem_object.h"

struct drm_i915_private;
struct drm_i915_gem_object;

enum fb_op_origin {
	ORIGIN_GTT,
	ORIGIN_CPU,
	ORIGIN_CS,
	ORIGIN_FLIP,
	ORIGIN_DIRTYFB,
};

void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
				    unsigned frontbuffer_bits);
void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
				     unsigned frontbuffer_bits);
void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
			    unsigned frontbuffer_bits);

void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
			       enum fb_op_origin origin,
			       unsigned int frontbuffer_bits);
void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
			  enum fb_op_origin origin,
			  unsigned int frontbuffer_bits);

/**
 * intel_fb_obj_invalidate - invalidate frontbuffer object
 * @obj: GEM object to invalidate
 * @origin: which operation caused the invalidation
 *
 * This function gets called every time rendering on the given object starts and
 * frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
 * be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
 * until the rendering completes or a flip on this frontbuffer plane is
 * scheduled.
 */
static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
					   enum fb_op_origin origin)
{
	unsigned int frontbuffer_bits;

	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
	if (!frontbuffer_bits)
		return false;

	__intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
	return true;
}

/**
 * intel_fb_obj_flush - flush frontbuffer object
 * @obj: GEM object to flush
 * @origin: which operation caused the flush
 *
 * This function gets called every time rendering on the given object has
 * completed and frontbuffer caching can be started again.
 */
static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
				      enum fb_op_origin origin)
{
	unsigned int frontbuffer_bits;

	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
	if (!frontbuffer_bits)
		return;

	__intel_fb_obj_flush(obj, origin, frontbuffer_bits);
}

#endif /* __INTEL_FRONTBUFFER_H__ */
Commit	Line	Data
5d723d7a CW	1	/*
	2	* Copyright (c) 2014-2016 Intel Corporation
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice (including the next
	12	* paragraph) shall be included in all copies or substantial portions of the
	13	* 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	21	* IN THE SOFTWARE.
	22	*/
	23
	24	#ifndef __INTEL_FRONTBUFFER_H__
	25	#define __INTEL_FRONTBUFFER_H__
	26
e1ef734e JN	27	#include "i915_gem_object.h"
e1ef734e JN	28
5d723d7a CW	29	struct drm_i915_private;
	30	struct drm_i915_gem_object;
	31
e1ef734e JN	32	enum fb_op_origin {
	33	ORIGIN_GTT,
	34	ORIGIN_CPU,
	35	ORIGIN_CS,
	36	ORIGIN_FLIP,
	37	ORIGIN_DIRTYFB,
	38	};
	39
5748b6a1	40	void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
5d723d7a	41	unsigned frontbuffer_bits);
5748b6a1	42	void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
5d723d7a	43	unsigned frontbuffer_bits);
5748b6a1	44	void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
5d723d7a	45	unsigned frontbuffer_bits);
b5add959 CW	46
b5add959 CW	47	void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
faf5bf0a CW	48	enum fb_op_origin origin,
faf5bf0a CW	49	unsigned int frontbuffer_bits);
b5add959	50	void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
faf5bf0a CW	51	enum fb_op_origin origin,
faf5bf0a CW	52	unsigned int frontbuffer_bits);
b5add959 CW	53
	54	/**
	55	* intel_fb_obj_invalidate - invalidate frontbuffer object
	56	* @obj: GEM object to invalidate
	57	* @origin: which operation caused the invalidation
	58	*
	59	* This function gets called every time rendering on the given object starts and
	60	* frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
	61	* be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
	62	* until the rendering completes or a flip on this frontbuffer plane is
	63	* scheduled.
	64	*/
5b8c8aec	65	static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
b5add959 CW	66	enum fb_op_origin origin)
b5add959 CW	67	{
faf5bf0a CW	68	unsigned int frontbuffer_bits;
	69
	70	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
	71	if (!frontbuffer_bits)
5b8c8aec	72	return false;
b5add959	73
faf5bf0a	74	__intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
5b8c8aec	75	return true;
b5add959 CW	76	}
	77
	78	/**
	79	* intel_fb_obj_flush - flush frontbuffer object
	80	* @obj: GEM object to flush
b5add959 CW	81	* @origin: which operation caused the flush
	82	*
	83	* This function gets called every time rendering on the given object has
d59b21ec	84	* completed and frontbuffer caching can be started again.
b5add959 CW	85	*/
b5add959 CW	86	static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
b5add959 CW	87	enum fb_op_origin origin)
b5add959 CW	88	{
faf5bf0a CW	89	unsigned int frontbuffer_bits;
	90
	91	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
	92	if (!frontbuffer_bits)
b5add959 CW	93	return;
b5add959 CW	94
d59b21ec	95	__intel_fb_obj_flush(obj, origin, frontbuffer_bits);
b5add959	96	}
5d723d7a CW	97
5d723d7a CW	98	#endif /* __INTEL_FRONTBUFFER_H__ */