CRTC_CSYNC_EN
c_sync = crtc->gen_cntl & CRTC_CSYNC_EN ? 1 : 0;
c_sync = sync & FB_SYNC_COMP_HIGH_ACT ? CRTC_CSYNC_EN : 0;
c_sync = crtc->gen_cntl & CRTC_CSYNC_EN ? 1 : 0;
(crtc->gen_cntl & CRTC_CSYNC_EN) ? 'P' : 'N');