DST_CNTL
aty_st_le32(DST_CNTL, DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
aty_st_le32(DST_CNTL, direction | rotation, par);
aty_st_le32(DST_CNTL,
aty_st_le32(DST_CNTL, DST_Y_TOP_TO_BOTTOM | DST_X_LEFT_TO_RIGHT | rotation, par);