RADEON_CRTC_V_SYNC_WID
if( v_sync_wid > (RADEON_CRTC_V_SYNC_WID >> RADEON_CRTC_V_SYNC_WID_SHIFT))
v_sync_wid = (RADEON_CRTC_V_SYNC_WID >> RADEON_CRTC_V_SYNC_WID_SHIFT);
di->fp_info.v_sync_width = ((r & RADEON_CRTC_V_SYNC_WID)