[PATCH v3 14/15] media: mt9m114: Return -EPROBE_DEFER if no endpoint is found

[Hans de Goede <hansg@kernel.org>]

With IPU# bridges, endpoints may only be created when the IPU bridge is
initialized. This may happen after the sensor driver's first probe().

Signed-off-by: Hans de Goede <hansg@kernel.org>
---
 drivers/media/i2c/mt9m114.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c
index ec5e9ce24d1c..5e759a23e6cc 100644
--- a/drivers/media/i2c/mt9m114.c
+++ b/drivers/media/i2c/mt9m114.c
@@ -2448,11 +2448,14 @@ static int mt9m114_parse_dt(struct mt9m114 *sensor)
 	struct fwnode_handle *ep;
 	int ret;
 
+	/*
+	 * Sometimes the fwnode graph is initialized by the bridge driver,
+	 * wait for this.
+	 */
 	ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
-	if (!ep) {
-		dev_err(&sensor->client->dev, "No endpoint found\n");
-		return -EINVAL;
-	}
+	if (!ep)
+		return dev_err_probe(&sensor->client->dev, -EPROBE_DEFER,
+				     "waiting for fwnode graph endpoint\n");
 
 	sensor->bus_cfg.bus_type = V4L2_MBUS_UNKNOWN;
 	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &sensor->bus_cfg);
-- 
2.49.0