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 struct drm_i915_private; 28 struct drm_i915_gem_object; 29 30 void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv, 31 unsigned frontbuffer_bits); 32 void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv, 33 unsigned frontbuffer_bits); 34 void intel_frontbuffer_flip(struct drm_i915_private *dev_priv, 35 unsigned frontbuffer_bits); 36 37 void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj, 38 enum fb_op_origin origin, 39 unsigned int frontbuffer_bits); 40 void __intel_fb_obj_flush(struct drm_i915_gem_object *obj, 41 bool retire, 42 enum fb_op_origin origin, 43 unsigned int frontbuffer_bits); 44 45 /** 46 * intel_fb_obj_invalidate - invalidate frontbuffer object 47 * @obj: GEM object to invalidate 48 * @origin: which operation caused the invalidation 49 * 50 * This function gets called every time rendering on the given object starts and 51 * frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must 52 * be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed 53 * until the rendering completes or a flip on this frontbuffer plane is 54 * scheduled. 55 */ 56 static inline void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj, 57 enum fb_op_origin origin) 58 { 59 unsigned int frontbuffer_bits; 60 61 frontbuffer_bits = atomic_read(&obj->frontbuffer_bits); 62 if (!frontbuffer_bits) 63 return; 64 65 __intel_fb_obj_invalidate(obj, origin, frontbuffer_bits); 66 } 67 68 /** 69 * intel_fb_obj_flush - flush frontbuffer object 70 * @obj: GEM object to flush 71 * @retire: set when retiring asynchronous rendering 72 * @origin: which operation caused the flush 73 * 74 * This function gets called every time rendering on the given object has 75 * completed and frontbuffer caching can be started again. If @retire is true 76 * then any delayed flushes will be unblocked. 77 */ 78 static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj, 79 bool retire, 80 enum fb_op_origin origin) 81 { 82 unsigned int frontbuffer_bits; 83 84 frontbuffer_bits = atomic_read(&obj->frontbuffer_bits); 85 if (!frontbuffer_bits) 86 return; 87 88 __intel_fb_obj_flush(obj, retire, origin, frontbuffer_bits); 89 } 90 91 #endif /* __INTEL_FRONTBUFFER_H__ */ 92