Linux kernel mirror (for testing)
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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
27#include "i915_gem_object.h"
28
29struct drm_i915_private;
30struct drm_i915_gem_object;
31
32enum fb_op_origin {
33 ORIGIN_GTT,
34 ORIGIN_CPU,
35 ORIGIN_CS,
36 ORIGIN_FLIP,
37 ORIGIN_DIRTYFB,
38};
39
40void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
41 unsigned frontbuffer_bits);
42void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
43 unsigned frontbuffer_bits);
44void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
45 unsigned frontbuffer_bits);
46
47void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
48 enum fb_op_origin origin,
49 unsigned int frontbuffer_bits);
50void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
51 enum fb_op_origin origin,
52 unsigned int frontbuffer_bits);
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 */
65static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
66 enum fb_op_origin origin)
67{
68 unsigned int frontbuffer_bits;
69
70 frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
71 if (!frontbuffer_bits)
72 return false;
73
74 __intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
75 return true;
76}
77
78/**
79 * intel_fb_obj_flush - flush frontbuffer object
80 * @obj: GEM object to flush
81 * @origin: which operation caused the flush
82 *
83 * This function gets called every time rendering on the given object has
84 * completed and frontbuffer caching can be started again.
85 */
86static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
87 enum fb_op_origin origin)
88{
89 unsigned int frontbuffer_bits;
90
91 frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
92 if (!frontbuffer_bits)
93 return;
94
95 __intel_fb_obj_flush(obj, origin, frontbuffer_bits);
96}
97
98#endif /* __INTEL_FRONTBUFFER_H__ */