iface_to_hdm
struct dim2_hdm *dev = iface_to_hdm(most_iface);
struct dim2_hdm *dev = iface_to_hdm(most_iface);
struct dim2_hdm *dev = iface_to_hdm(most_iface);
struct dim2_hdm *dev = iface_to_hdm(most_iface);