[media] dvb-usb-cxusb: Geniatech T230 - resync TS FIFO after lock

This patch fix streaming issue for Geniatech T230/PT360.

Signed-off-by: CrazyCat <crazycat69@narod.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

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

@@ -369,6 +369,26 @@ static int cxusb_aver_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 	return 0;
 }
 
+static int cxusb_read_status(struct dvb_frontend *fe,
+				  enum fe_status *status)
+{
+	struct dvb_usb_adapter *adap = (struct dvb_usb_adapter *)fe->dvb->priv;
+	struct cxusb_state *state = (struct cxusb_state *)adap->dev->priv;
+	int ret;
+
+	ret = state->fe_read_status(fe, status);
+
+	/* it need resync slave fifo when signal change from unlock to lock.*/
+	if ((*status & FE_HAS_LOCK) && (!state->last_lock)) {
+		mutex_lock(&state->stream_mutex);
+		cxusb_streaming_ctrl(adap, 1);
+		mutex_unlock(&state->stream_mutex);
+	}
+
+	state->last_lock = (*status & FE_HAS_LOCK) ? 1 : 0;
+	return ret;
+}
+
 static void cxusb_d680_dmb_drain_message(struct dvb_usb_device *d)
 {
 	int       ep = d->props.generic_bulk_ctrl_endpoint;
@@ -1372,6 +1392,12 @@ static int cxusb_mygica_t230_frontend_attach(struct dvb_usb_adapter *adap)
 
 	st->i2c_client_tuner = client_tuner;
 
+	/* hook fe: need to resync the slave fifo when signal locks. */
+	mutex_init(&st->stream_mutex);
+	st->last_lock = 0;
+	st->fe_read_status = adap->fe_adap[0].fe->ops.read_status;
+	adap->fe_adap[0].fe->ops.read_status = cxusb_read_status;
+
 	return 0;
 }
 

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

@@ -37,6 +37,11 @@ struct cxusb_state {
 	struct i2c_client *i2c_client_tuner;
 
 	unsigned char data[MAX_XFER_SIZE];
+
+	struct mutex stream_mutex;
+	u8 last_lock;
+	int (*fe_read_status)(struct dvb_frontend *fe,
+		enum fe_status *status);
 };
 
 #endif