diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
index eb76acdb2cd9..1395eb783dc0 100644
--- a/drivers/media/i2c/max9286.c
+++ b/drivers/media/i2c/max9286.c
@@ -188,8 +188,11 @@ struct max9286_priv {
 	struct v4l2_async_notifier notifier;
 };
 
+#define to_index(priv, source) ((source) - &(priv)->sources[0])
+
 static struct max9286_source *next_source(struct max9286_priv *priv,
-					  struct max9286_source *source)
+					  struct max9286_source *source,
+					  bool routed)
 {
 	if (!source)
 		source = &priv->sources[0];
@@ -197,17 +200,27 @@ static struct max9286_source *next_source(struct max9286_priv *priv,
 		source++;
 
 	for (; source < &priv->sources[MAX9286_NUM_GMSL]; source++) {
-		if (source->fwnode)
+		unsigned int index = to_index(priv, source);
+
+		if (!source->fwnode)
+			continue;
+
+		/*
+		 * Careful here! A very unfortunate call to set_routing() can
+		 * change priv->route_mask behind our back!
+		 */
+		if (!routed || priv->route_mask & BIT(index))
 			return source;
 	}
 
 	return NULL;
 }
 
-#define for_each_source(priv, source) \
-	for ((source) = NULL; ((source) = next_source((priv), (source))); )
+#define for_each_route(priv, source) \
+	for ((source) = NULL; ((source) = next_source((priv), (source), true)); )
 
-#define to_index(priv, source) ((source) - &(priv)->sources[0])
+#define for_each_source(priv, source) \
+	for ((source) = NULL; ((source) = next_source((priv), (source), false)); )
 
 static inline struct max9286_priv *sd_to_max9286(struct v4l2_subdev *sd)
 {
@@ -409,7 +422,7 @@ static int max9286_check_video_links(struct max9286_priv *priv)
 		if (ret < 0)
 			return -EIO;
 
-		if ((ret & MAX9286_VIDEO_DETECT_MASK) == priv->source_mask)
+		if ((ret & MAX9286_VIDEO_DETECT_MASK) == priv->route_mask)
 			break;
 
 		usleep_range(350, 500);
@@ -493,9 +506,10 @@ static int max9286_check_config_link(struct max9286_priv *priv,
 static int max9286_set_pixelrate(struct max9286_priv *priv)
 {
 	struct max9286_source *source = NULL;
+	unsigned int num_routes = 0;
 	u64 pixelrate = 0;
 
-	for_each_source(priv, source) {
+	for_each_route(priv, source) {
 		struct v4l2_ctrl *ctrl;
 		u64 source_rate = 0;
 
@@ -516,6 +530,8 @@ static int max9286_set_pixelrate(struct max9286_priv *priv)
 				"Unable to calculate pixel rate\n");
 			return -EINVAL;
 		}
+
+		num_routes++;
 	}
 
 	if (!pixelrate) {
@@ -529,7 +545,7 @@ static int max9286_set_pixelrate(struct max9286_priv *priv)
 	 * by the number of available sources.
 	 */
 	return v4l2_ctrl_s_ctrl_int64(priv->pixelrate,
-				      pixelrate * priv->nsources);
+				      pixelrate * num_routes);
 }
 
 static int max9286_notify_bound(struct v4l2_async_notifier *notifier,
@@ -691,8 +707,8 @@ static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
 		 */
 		max9286_i2c_mux_open(priv);
 
-		/* Start all cameras. */
-		for_each_source(priv, source) {
+		/* Start cameras. */
+		for_each_route(priv, source) {
 			ret = v4l2_subdev_call(source->sd, video, s_stream, 1);
 			if (ret)
 				return ret;
@@ -733,8 +749,8 @@ static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
 	} else {
 		max9286_write(priv, 0x15, MAX9286_VCTYPE | MAX9286_0X15_RESV);
 
-		/* Stop all cameras. */
-		for_each_source(priv, source)
+		/* Stop cameras. */
+		for_each_route(priv, source)
 			v4l2_subdev_call(source->sd, video, s_stream, 0);
 
 		max9286_i2c_mux_close(priv);
@@ -912,6 +928,29 @@ static int max9286_set_routing(struct v4l2_subdev *sd,
 	v4l2_subdev_lock_state(state);
 
 	ret = _max9286_set_routing(sd, state, routing);
+	if (ret)
+		goto out;
+
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		goto out;
+
+	/*
+	 * Update the active routes mask and the pixel rate according to the
+	 * routed sources.
+	 */
+	priv->route_mask = 0;
+	for (i = 0; i < routing->num_routes; ++i) {
+		struct v4l2_subdev_route *route = &routing->routes[i];
+
+		if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE))
+			continue;
+
+		priv->route_mask |= BIT(route->sink_pad);
+	}
+
+	max9286_set_pixelrate(priv);
+
+out:
 	v4l2_subdev_unlock_state(state);
 
 	return ret;
