CP_RB0_WPTR      1284 drivers/gpu/drm/amd/amdgpu/sid.h #define	CP_RB0_WPTR					0x3045
CP_RB0_WPTR      1312 drivers/gpu/drm/radeon/cikd.h #define	CP_RB0_WPTR					0xC114
CP_RB0_WPTR       492 drivers/gpu/drm/radeon/nid.h #define	CP_RB0_WPTR					0xC114
CP_RB0_WPTR      1255 drivers/gpu/drm/radeon/sid.h #define	CP_RB0_WPTR					0xC114