[media] adv7604: set restart_stdi_once flag when signal is lost

If the restart_stdi_once trick fails to find a valid
format the flag was never reset.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/i2c/adv7604.c

@@ -1216,6 +1216,7 @@ static int adv7604_query_dv_timings(struct v4l2_subdev *sd,
 	memset(timings, 0, sizeof(struct v4l2_dv_timings));
 
 	if (no_signal(sd)) {
+		state->restart_stdi_once = true;
 		v4l2_dbg(1, debug, sd, "%s: no valid signal\n", __func__);
 		return -ENOLINK;
 	}