V4L/DVB (7600): em28xx: Sets frequency when changing to analog mode

This will make tuner-xc2028 to change to analog, if needed.
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/em28xx/em28xx-video.c

@@ -560,6 +560,8 @@ static int
 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 {
 	struct em28xx_fh *fh = vq->priv_data;
+	struct em28xx        *dev = fh->dev;
+	struct v4l2_frequency f;
 
 	*size = 16 * fh->dev->width * fh->dev->height >> 3;
 	if (0 == *count)
@@ -568,6 +570,14 @@ buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 	if (*count < EM28XX_MIN_BUF)
 		*count = EM28XX_MIN_BUF;
 
+	dev->mode = EM28XX_ANALOG_MODE;
+
+	/* Ask tuner to go to analog mode */
+	memset (&f, 0, sizeof(f));
+	f.frequency = dev->ctl_freq;
+
+	em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
+
 	return 0;
 }