CP_RB_RPTR_WR 486 drivers/gpu/drm/radeon/evergreend.h #define CP_RB_RPTR_WR 0xC108 CP_RB_RPTR_WR 205 drivers/gpu/drm/radeon/r600d.h #define CP_RB_RPTR_WR 0xC108 CP_RB_RPTR_WR 358 drivers/gpu/drm/radeon/rv770d.h #define CP_RB_RPTR_WR 0xC108