LXR linux/drivers/gpu/drm/i915/intel

   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
  27struct drm_i915_private;
  28struct drm_i915_gem_object;
  29
  30void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
  31                                    unsigned frontbuffer_bits);
  32void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
  33                                     unsigned frontbuffer_bits);
  34void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
  35                            unsigned frontbuffer_bits);
  36
  37void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
  38                               enum fb_op_origin origin,
  39                               unsigned int frontbuffer_bits);
  40void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
  41                          enum fb_op_origin origin,
  42                          unsigned int frontbuffer_bits);
  43
  44/**
  45 * intel_fb_obj_invalidate - invalidate frontbuffer object
  46 * @obj: GEM object to invalidate
  47 * @origin: which operation caused the invalidation
  48 *
  49 * This function gets called every time rendering on the given object starts and
  50 * frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
  51 * be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
  52 * until the rendering completes or a flip on this frontbuffer plane is
  53 * scheduled.
  54 */
  55static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
  56                                           enum fb_op_origin origin)
  57{
  58        unsigned int frontbuffer_bits;
  59
  60        frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
  61        if (!frontbuffer_bits)
  62                return false;
  63
  64        __intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
  65        return true;
  66}
  67
  68/**
  69 * intel_fb_obj_flush - flush frontbuffer object
  70 * @obj: GEM object to flush
  71 * @origin: which operation caused the flush
  72 *
  73 * This function gets called every time rendering on the given object has
  74 * completed and frontbuffer caching can be started again.
  75 */
  76static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
  77                                      enum fb_op_origin origin)
  78{
  79        unsigned int frontbuffer_bits;
  80
  81        frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
  82        if (!frontbuffer_bits)
  83                return;
  84
  85        __intel_fb_obj_flush(obj, origin, frontbuffer_bits);
  86}
  87
  88#endif /* __INTEL_FRONTBUFFER_H__ */
  89