NO_SIGNAL
((mode) == NO_SIGNAL || (mode) == NO_LOCK || (mode) == OUT_OF_RANGE)
dev->dv_timings_signal_mode[i] != NO_SIGNAL)
dev->dv_timings_signal_mode[dev->input] == NO_SIGNAL)
if (dev->std_signal_mode[dev->input] == NO_SIGNAL) {
if (dev->std_signal_mode[dev->input] == NO_SIGNAL ||
if (dev->dv_timings_signal_mode[input] == NO_SIGNAL ||