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Subject[RFC PATCH v3 8/9] media: v4l2-core: v4l2-async: Check possible match in match_fwnode based on sd->fwnode->secondary
Date
Where the fwnode graph is comprised of software_nodes, these will be
assigned as the secondary to dev->fwnode. Check the v4l2_subdev's fwnode
for a secondary and attempt to match against it during match_fwnode() to
accommodate that possibility.

Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
Changes in v3:
- patch introduced

drivers/media/v4l2-core/v4l2-async.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index e3ab003a6..6486dbde7 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -87,6 +87,14 @@ static bool match_fwnode(struct v4l2_async_notifier *notifier,
if (sd->fwnode == asd->match.fwnode)
return true;

+ /*
+ * Check the same situation for any possible secondary assigned to the
+ * subdev's fwnode
+ */
+ if ((!IS_ERR_OR_NULL(sd->fwnode->secondary)) &&
+ sd->fwnode->secondary == asd->match.fwnode)
+ return true;
+
/*
* Otherwise, check if the sd fwnode and the asd fwnode refer to an
* endpoint or a device. If they're of the same type, there's no match.
--
2.17.1
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