RADEON_DST_Y_TOP_TO_BOTTOM
OUTREG(ai->regs, RADEON_DP_CNTL, (RADEON_DST_X_LEFT_TO_RIGHT | RADEON_DST_Y_TOP_TO_BOTTOM));
OUTREG(ai->regs, RADEON_DP_CNTL, (RADEON_DST_X_LEFT_TO_RIGHT | RADEON_DST_Y_TOP_TO_BOTTOM));
| (ydir >= 0 ? RADEON_DST_Y_TOP_TO_BOTTOM : 0)));