[media] tvp5150: allow get/set_fmt on the video source pad

To let userspace propagate formats downstream in a media controller
scenario, the video source pad (now pad 1, DEMOD_PAD_VID_OUT) must allow
setting and getting the format. Incidentally, tvp5150_fill_fmt was
implemented for this pad, not for the new analog input pad (now pad 0,
DEMOD_PAD_IF_INPUT).

Fixes: 55606310e77f ("[media] tvp5150: create the expected number of pads")

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/tvp5150.c

@@ -865,7 +865,7 @@ static int tvp5150_fill_fmt(struct v4l2_subdev *sd,
 	struct v4l2_mbus_framefmt *f;
 	struct tvp5150 *decoder = to_tvp5150(sd);
 
-	if (!format || format->pad)
+	if (!format || (format->pad != DEMOD_PAD_VID_OUT))
 		return -EINVAL;
 
 	f = &format->format;