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 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 */ 55 static 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 */ 76 static 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