usbvc_vs_get_probe
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_get, GET_CUR)
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_max, GET_MAX) !=
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_curr, GET_CUR)
if (usbvc_vs_get_probe(usbvcp, strm_if, &ctrl_min, GET_MIN) !=
int usbvc_vs_get_probe(usbvc_state_t *, usbvc_stream_if_t *,