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The mfg_ref_sel clock is a mux used to switch between different "safe" (and slower) clock sources for the GPU: this is used during MFGPLL reconfiguration and eventually during idling at very low frequencies. This clock getting turned off means that the GPU will occasionally be unclocked, producing obvious consequences such as system crash or unpredictable behavior: assigning it to the top level MFG power domain will make sure that this stays on at all times during any operation on the MFG domain (only GPU-related transactions). Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Link: https://lore.kernel.org/r/20230301095523.428461-9-angelogioacchino.delregno@collabora.com Signed-off-by: Matthias Brugger <matthias.bgg@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 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.