[media] dvb_usb_v2: add .get_usb_stream_config()

New callback to resolve current USB stream configuration.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/dvb_usb.h

@@ -240,6 +240,8 @@ struct dvb_usb_device_properties {
 	int (*identify_state) (struct dvb_usb_device *);
 	int (*init) (struct dvb_usb_device *);
 	int (*get_rc_config) (struct dvb_usb_device *, struct dvb_usb_rc *);
+	int (*get_usb_stream_config) (struct dvb_frontend *,
+			struct usb_data_stream_properties *);
 
 	struct i2c_algorithm *i2c_algo;
 

drivers/media/dvb/dvb-usb/dvb_usb_dvb.c

@@ -56,8 +56,22 @@ static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
 	 * for reception.
 	 */
 	if (adap->feedcount == onoff && adap->feedcount > 0) {
+		struct usb_data_stream_properties stream_props;
+
+		/* resolve USB stream configuration */
+		if (adap->dev->props.get_usb_stream_config) {
+			ret = adap->dev->props.get_usb_stream_config(
+					adap->fe_adap[adap->active_fe].fe,
+					&stream_props);
+			if (ret < 0)
+				return ret;
+		} else {
+			stream_props = adap->props.fe[adap->active_fe].stream;
+		}
+
 		deb_ts("submitting all URBs\n");
-		usb_urb_submit(&adap->fe_adap[adap->active_fe].stream, NULL);
+		usb_urb_submit(&adap->fe_adap[adap->active_fe].stream,
+				&stream_props);
 
 		deb_ts("controlling pid parser\n");
 		if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&

drivers/media/dvb/dvb-usb/dvb_usb_urb.c

@@ -94,8 +94,9 @@ static void dvb_usb_data_complete_raw(struct usb_data_stream *stream,
 int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
 {
 	int i, ret = 0;
-	for (i = 0; i < adap->props.num_frontends; i++) {
+	struct usb_data_stream_properties stream_props;
 
+	for (i = 0; i < adap->props.num_frontends; i++) {
 		adap->fe_adap[i].stream.udev      = adap->dev->udev;
 		if (adap->props.fe[i].caps & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
 			adap->fe_adap[i].stream.complete =
@@ -107,8 +108,18 @@ int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
 		else
 		adap->fe_adap[i].stream.complete  = dvb_usb_data_complete;
 		adap->fe_adap[i].stream.user_priv = adap;
-		ret = usb_urb_init(&adap->fe_adap[i].stream,
-				   &adap->props.fe[i].stream);
+
+		/* resolve USB stream configuration */
+		if (adap->dev->props.get_usb_stream_config) {
+			ret = adap->dev->props.get_usb_stream_config(NULL,
+					&stream_props);
+			if (ret < 0)
+				break;
+		} else {
+			stream_props = adap->props.fe[i].stream;
+		}
+
+		ret = usb_urb_init(&adap->fe_adap[i].stream, &stream_props);
 		if (ret < 0)
 			break;
 	}