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Audio tuner is used to handle clock drift between 26M and APLL domain. It's expected when abs(chg_cnt) equals to upper bound, tuner updates pcw setting automatically, and then abs(chg_cnt) decreases. In the stress test, we found abs(chg_cnt) possibly equals to 2 at the unexpected timing. This results in wrong pcw updating. Finally, abs(chg_cnt) will always be larger than upper bound, As a result, we update the upper bound to 3 to handle the corner case. Signed-off-by: Trevor Wu <trevor.wu@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20220927151141.11846-1-trevor.wu@mediatek.com Signed-off-by: Mark Brown <broonie@kernel.org>
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.