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The Allwinner A64's GPU has currently three operating points. However, the BSP runs the GPU fixed at 432 MHz. In addition, at least one of the devices using that SoC - the pinephone - shows unstabilities (see link) that can be circumvented by running the GPU at a fixed rate. Therefore, remove the other two operating points from the GPU OPP table, so that the GPU runs at a fixed rate of 432 MHz. Link: https://gitlab.com/postmarketOS/pmaports/-/issues/805 Acked-by: Erico Nunes <nunes.erico@gmail.com> Signed-off-by: Frank Oltmanns <frank@oltmanns.dev> Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20240310-pinephone-pll-fixes-v4-5-46fc80c83637@oltmanns.dev Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.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 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.