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The gain is expressed in multiple of 0.3dB, as a value between 0.0dB and 72.0dB. Gains between 0.0dB and 30.0dB (included) apply analog gain only, higher gains from 30.3dB to 72dB apply additional digital gain. The maximum gain value is erroneously set to 72. Increase it to 100 to cover the whole analog gain range. Support for digital gain can be added separately if needed. The IMX327 and IMX462 are largely compatible with the IMX290, but have an analog gain range of 0.0dB to 29.4dB and 42dB of digital gain. When support for those sensors gets added to the driver, the gain control should be adjusted accordingly. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
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.