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authorPhilipp Zabel <p.zabel@pengutronix.de>2021-03-22 17:44:08 +0300
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2021-06-28 16:17:42 +0300
commit95778c2d0979618e3349b1d2324ec282a5a6adbf (patch)
tree43070232bef07c42d2862871e05392fb148db477 /drivers/media
parent50e7a31d30e8221632675abed3be306382324ca2 (diff)
downloadlinux-95778c2d0979618e3349b1d2324ec282a5a6adbf.tar.xz
media: video-mux: Skip dangling endpoints
i.MX6 device tree include files contain dangling endpoints for the board device tree writers' convenience. These are still included in many existing device trees. Treat dangling endpoints as non-existent to support them. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Fixes: 612b385efb1e ("media: video-mux: Create media links in bound notifier") Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/platform/video-mux.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/media/platform/video-mux.c b/drivers/media/platform/video-mux.c
index f7e2a5e48ccf..905005e271ca 100644
--- a/drivers/media/platform/video-mux.c
+++ b/drivers/media/platform/video-mux.c
@@ -364,7 +364,7 @@ static int video_mux_async_register(struct video_mux *vmux,
for (i = 0; i < num_input_pads; i++) {
struct v4l2_async_subdev *asd;
- struct fwnode_handle *ep;
+ struct fwnode_handle *ep, *remote_ep;
ep = fwnode_graph_get_endpoint_by_id(
dev_fwnode(vmux->subdev.dev), i, 0,
@@ -372,6 +372,14 @@ static int video_mux_async_register(struct video_mux *vmux,
if (!ep)
continue;
+ /* Skip dangling endpoints for backwards compatibility */
+ remote_ep = fwnode_graph_get_remote_endpoint(ep);
+ if (!remote_ep) {
+ fwnode_handle_put(ep);
+ continue;
+ }
+ fwnode_handle_put(remote_ep);
+
asd = v4l2_async_notifier_add_fwnode_remote_subdev(
&vmux->notifier, ep, struct v4l2_async_subdev);