gud_usb_get
ret = gud_usb_get(gdrm, GUD_REQ_GET_CONNECTOR_EDID, connector->index,
ret = gud_usb_get(gdrm, GUD_REQ_GET_CONNECTOR_MODES, connector->index,
ret = gud_usb_get(gdrm, GUD_REQ_GET_CONNECTOR_TV_MODE_VALUES,
ret = gud_usb_get(gdrm, GUD_REQ_GET_CONNECTOR_PROPERTIES, connector->index,
ret = gud_usb_get(gdrm, GUD_REQ_GET_CONNECTORS, 0,
ret = gud_usb_get(gdrm, request, index, buf, sizeof(*val));
ret = gud_usb_get(gdrm, GUD_REQ_GET_PROPERTIES, 0,
ret = gud_usb_get(gdrm, GUD_REQ_GET_FORMATS, 0, formats_dev, GUD_FORMATS_MAX_NUM);
int gud_usb_get(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len);