EVERGREEN_MASTER_UPDATE_MODE
WREG32(EVERGREEN_MASTER_UPDATE_MODE + radeon_crtc->crtc_offset, 0);
tmp = RREG32(EVERGREEN_MASTER_UPDATE_MODE + crtc_offsets[i]);
WREG32(EVERGREEN_MASTER_UPDATE_MODE + crtc_offsets[i], tmp);