hdspm_system_clock_mode
static int hdspm_system_clock_mode(struct hdspm *hdspm);
if (0 == hdspm_system_clock_mode(hdspm)) {
ucontrol->value.enumerated.item[0] = hdspm_system_clock_mode(hdspm);
(hdspm_system_clock_mode(hdspm) == 0) ? "master" : "slave");
info.system_clock_mode = hdspm_system_clock_mode(hdspm);