RLC_HB_WPTR_LSB_ADDR  396 drivers/gpu/drm/radeon/evergreend.h #define RLC_HB_WPTR_LSB_ADDR                              0x3f14
RLC_HB_WPTR_LSB_ADDR  691 drivers/gpu/drm/radeon/r600d.h #define RLC_HB_WPTR_LSB_ADDR                              0x3f14