[PATCH 6.18 161/752] media: mt9m114: Return -EPROBE_DEFER if no endpoint is found

Sasha Levin
2026-02-28T17:50:24Z

From: Hans de Goede <johannes.goede@oss.qualcomm.com>

[ Upstream commit 437e1f6a960035166495a5117aacbc596115eeb6 ]

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

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/i2c/mt9m114.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c
index 554f25071cca6..b1325e2cd1321 100644
--- a/drivers/media/i2c/mt9m114.c
+++ b/drivers/media/i2c/mt9m114.c
@@ -2360,11 +2360,17 @@ static int mt9m114_parse_dt(struct mt9m114 *sensor)
struct fwnode_handle *ep;
int ret;

+ /*
+ * On ACPI systems the fwnode graph can be initialized by a bridge
+ * driver, which may not have probed yet. Wait for this.
+ *
+ * TODO: Return an error once bridge driver code will have moved
+ * to the ACPI core.
+ */
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);
--
2.51.0