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 "gem/i915_gem_object.h" 28 29 struct drm_i915_private; 30 struct drm_i915_gem_object; 31 32 enum fb_op_origin { 33 ORIGIN_GTT, 34 ORIGIN_CPU, 35 ORIGIN_CS, 36 ORIGIN_FLIP, 37 ORIGIN_DIRTYFB, 38 }; 39 40 void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv, 41 unsigned frontbuffer_bits); 42 void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv, 43 unsigned frontbuffer_bits); 44 void intel_frontbuffer_flip(struct drm_i915_private *dev_priv, 45 unsigned frontbuffer_bits); 46 47 void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj, 48 enum fb_op_origin origin, 49 unsigned int frontbuffer_bits); 50 void __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 */ 65 static 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 */ 86 static 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__ */ 99