VCE_RB_WPTR      1965 drivers/gpu/drm/amd/amdgpu/sid.h #define VCE_RB_WPTR					0x20190
VCE_RB_WPTR      2118 drivers/gpu/drm/radeon/cikd.h #define VCE_RB_WPTR			0x20190
VCE_RB_WPTR      1902 drivers/gpu/drm/radeon/sid.h #define VCE_RB_WPTR					0x20190