intel_fb_obj_invalidate — invalidate frontbuffer object
|struct drm_i915_gem_object * obj,|
|enum fb_op_origin origin|
This function gets called every time rendering on the given object starts and frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed until the rendering completes or a flip on this frontbuffer plane is scheduled.