DRM_MODE_DPMS_OFF
sc->output.connector.dpms = DRM_MODE_DPMS_OFF;
{ DRM_MODE_DPMS_OFF, "Off" }
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
(*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
int dpms = DRM_MODE_DPMS_OFF;
int dpms = DRM_MODE_DPMS_OFF;
drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF);