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517fd2b6a0
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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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.