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Subject: media: hi556: Return -EPROBE_DEFER if no endpoint is found
Author: Hans de Goede <hdego...@redhat.com>
Date: Mon Apr 15 15:10:35 2024 +0200
With ipu bridge, endpoints may only be created when ipu bridge has
initialised. This may happen after the sensor driver has first probed.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/i2c/hi556.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
---
diff --git a/drivers/media/i2c/hi556.c b/drivers/media/i2c/hi556.c
index 38c77d515786..c54cd49e56a1 100644
--- a/drivers/media/i2c/hi556.c
+++ b/drivers/media/i2c/hi556.c
@@ -1206,8 +1206,18 @@ static int hi556_check_hwcfg(struct device *dev)
int ret = 0;
unsigned int i, j;
- if (!fwnode)
- return -ENXIO;
+ /*
+ * Sometimes the fwnode graph is initialized by the bridge driver,
+ * wait for this.
+ */
+ ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
+ if (!ep)
+ return -EPROBE_DEFER;
+
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+ fwnode_handle_put(ep);
+ if (ret)
+ return ret;
ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
if (ret) {
@@ -1220,15 +1230,6 @@ static int hi556_check_hwcfg(struct device *dev)
return -EINVAL;
}
- ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
- if (!ep)
- return -ENXIO;
-
- ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
- fwnode_handle_put(ep);
- if (ret)
- return ret;
-
if (bus_cfg.bus.mipi_csi2.num_data_lanes != 2) {
dev_err(dev, "number of CSI2 data lanes %d is not supported",
bus_cfg.bus.mipi_csi2.num_data_lanes);
