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Linux kernel source tree
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Some ICL/TGL platforms with combo PHY ports suffer from signal integrity issues at HBR3. While certain systems include a Parade PS8461 mux to mitigate this, its presence cannot be reliably detected. Furthermore, broken or missing VBT entries make it unsafe to rely on VBT for enforcing link rate limits. To address this introduce a device specific quirk to cap the eDP link rate to HBR2 (540000 kHz). This will override any higher advertised rates from the sink or DPCD for specific devices. Currently, the quirk is added for Dell XPS 13 7390 2-in-1 which is reported in gitlab issue #5969 [1]. [1] https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/5969 v2: Align the quirk with the intended quirk name and refactor the condition to use min(). (Jani) v3: Use condition `rate > 540000`. Drop extra parentheses. (Ville) Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/5969 Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Link: https://lore.kernel.org/r/20250710052041.1238567-3-ankit.k.nautiyal@intel.com |
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| kernel | ||
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| README | ||
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.