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The V4M is the second Gen4 device that is enabled in the rcar-csi2 driver. There is much overlap with the already supported V4H device. The registers that where new on Gen4 and where added with the V4H prefix are retained and only new registers unique to the V4M are added with the new V4M prefix. This follows the style for when V4H was added which had an overlap with Gen3 registers. The V4M CSI-2 receiver supports D-PHY mode only, either in 1-, 2- or 4-lane configuration. The datasheets do not document lane swapping and is left out for now. While the V4M only supports D-PHY the configuration for it is added in such a way that it can be reused for V4H which supports both C-PHY and D-PHY. No known SoC exists to test the D-PHY configuration on V4H so it's not wired-up. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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| README | ||
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.