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The Adreno GPU Management Unit (GMU) can also scale the DDR Bandwidth along the Frequency and Power Domain level, until now we left the OPP core scale the OPP bandwidth via the interconnect path. In order to enable bandwidth voting via the GPU Management Unit (GMU), when an opp is set by devfreq we also look for the corresponding bandwidth index in the previously generated bw_table and pass this value along the frequency index to the GMU. The GMU also takes another vote called AB which is a 16bit quantized value of the floor bandwidth against the maximum supported bandwidth. The AB is calculated with a default 25% of the bandwidth like the downstream implementation too inform the GMU firmware the minimal quantity of bandwidth we require for this OPP. Only pass the AB vote starting from A750 GPUs. Since we now vote for all resources via the GMU, setting the OPP is no more needed, so we can completely skip calling dev_pm_opp_set_opp() in this situation. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Patchwork: https://patchwork.freedesktop.org/patch/629397/ Signed-off-by: Rob Clark <robdclark@chromium.org> |
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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.