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author | 2021-01-08 18:17:28 +0100 | |
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committer | 2021-01-27 15:47:54 +0100 | |
commit | 517fd2b6a058bc4f23735ab9a9e6b0d5c56876d1 (patch) | |
tree | 2d8339343340da5fdf19d434d1486a1f1efba52f /Documentation/admin-guide | |
parent | media: v4l2-async: Remove V4L2_ASYNC_MATCH_CUSTOM (diff) | |
download | linux-517fd2b6a058bc4f23735ab9a9e6b0d5c56876d1.tar.gz linux-517fd2b6a058bc4f23735ab9a9e6b0d5c56876d1.tar.bz2 linux-517fd2b6a058bc4f23735ab9a9e6b0d5c56876d1.zip |
media: v4l2-async: Add waiting subdevices debugfs
There is currently little to no information available about the reasons
why a v4l2-async device hasn't probed completely.
Inspired by the "devices_deferred" debugfs file, add a file to list
information about the subdevices that are on waiting lists, for each
notifier.
This is useful to debug v4l2-async subdevices and notifiers, for instance
when doing device bring-up.
For instance, a typical output would be:
$ cat /sys/kernel/debug/video4linux/pending_async_subdevices
ipu1_csi1:
[fwnode] dev=20e0000.iomuxc-gpr:ipu1_csi1_mux, node=/soc/bus@2000000/iomuxc-gpr@20e0000/ipu1_csi1_mux
ipu1_csi0:
[fwnode] dev=20e0000.iomuxc-gpr:ipu1_csi0_mux, node=/soc/bus@2000000/iomuxc-gpr@20e0000/ipu1_csi0_mux
imx6-mipi-csi2:
[fwnode] dev=1-003c, node=/soc/bus@2100000/i2c@21a4000/camera@3c
imx-media:
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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