VCE_RB_RPTR2     1959 drivers/gpu/drm/amd/amdgpu/sid.h #define VCE_RB_RPTR2					0x20178
VCE_RB_RPTR2     2115 drivers/gpu/drm/radeon/cikd.h #define VCE_RB_RPTR2			0x20178
VCE_RB_RPTR2     1896 drivers/gpu/drm/radeon/sid.h #define VCE_RB_RPTR2					0x20178