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The existing OPP table for PCIe is shared across different link configurations such as data rates 8GT/s x2 and 16GT/s x1. These configurations often operate at the same frequency, allowing them to reuse the same OPP entries. However, 8GT/s and 16 GT/s may have different RPMh votes which cannot be represented accurately when sharing a single OPP. To address this, introduce an `opp-level` to indicate the PCIe data rate and uniquely differentiate OPP entries even when the frequency is the same. Although this platform does not currently suffer from this issue, the change is introduced to support unification across platforms. Append the opp level to name of the opp node to indicate both frequency and level. Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> Acked-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://lore.kernel.org/r/20251013-opp_pcie-v5-2-eb64db2b4bd3@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.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.