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[ Upstream commit 51d1b338541dea83fec8e6f95d3e46fa469a73a8 ] [Why] There have been instances of some monitors being unable to link train on their reported link speed using their selected FFE preset. If a different FFE preset is found that has a higher rate of success during link training this workaround can be used to force its FFE preset. [How] A new link workaround flag is made called force_dp_ffe_preset. The flag is checked in override_training_settings and will set lt_settings->ffe_preset which is null if the flag is not set. The flag is then set in override_lane_settings. Reviewed-by: Wenjing Liu <wenjing.liu@amd.com> Signed-off-by: Brendan Tam <Brendan.Tam@amd.com> Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.