RADEON_CRTC_OFFSET
WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
if (RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET)
WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
return !!(RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) &
WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, crtc_offset);