drm_dp_link_power_down
drm_dp_link_power_down(&mhdp->aux, mhdp->link.revision);
drm_dp_link_power_down(&it6505->aux, it6505->link.revision);
drm_dp_link_power_down(&dp->aux, dp->link.revision);
EXPORT_SYMBOL(drm_dp_link_power_down);
err = drm_dp_link_power_down(sor->aux, sor->link.revision);
int drm_dp_link_power_down(struct drm_dp_aux *aux, unsigned char revision);