[media] adv7180: Add g_std operation

Add support to get the standard to the adv7180 driver.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/adv7180.c

@@ -434,6 +434,15 @@ out:
 	return ret;
 }
 
+static int adv7180_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
+{
+	struct adv7180_state *state = to_state(sd);
+
+	*norm = state->curr_norm;
+
+	return 0;
+}
+
 static int adv7180_set_power(struct adv7180_state *state, bool on)
 {
 	u8 val;
@@ -719,6 +728,7 @@ static int adv7180_g_mbus_config(struct v4l2_subdev *sd,
 
 static const struct v4l2_subdev_video_ops adv7180_video_ops = {
 	.s_std = adv7180_s_std,
+	.g_std = adv7180_g_std,
 	.querystd = adv7180_querystd,
 	.g_input_status = adv7180_g_input_status,
 	.s_routing = adv7180_s_routing,