[media] ov772x: Stop sensor readout right after reset

The sensor starts streaming video as soon as it gets powered or is
reset. Disable the output in the reset function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/i2c/soc_camera/ov772x.c

@@ -541,9 +541,15 @@ static int ov772x_mask_set(struct i2c_client *client, u8  command, u8  mask,
 
 static int ov772x_reset(struct i2c_client *client)
 {
-	int ret = ov772x_write(client, COM7, SCCB_RESET);
-	msleep(1);
+	int ret;
+
+	ret = ov772x_write(client, COM7, SCCB_RESET);
+	if (ret < 0)
 		return ret;
+
+	msleep(1);
+
+	return ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
 }
 
 /*