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a3d44f011c
The v4l2_subdev_link_validate() helper prints a warning if the .link_validate() operation is not implemented for video devices connected to the subdevs. Implement the operation to silence the warning. Ideally validation of the link between the video device and the subdev should be implemented in that operation. That would however break userspace that does not configure formats on all video devices before starting streaming. While this mode of operation may not be considered valid by the V4L2 API specification (interpretation differ), it is nonetheless supported by the vsp1 driver at the moment and used by at least the vsp1 unit test suite, and possibly other userspace applications. Removing it would be a regression. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> |
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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 reStructuredText 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.