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Right now we are aware of two cases that needs another hotplug retry: - Unpowered type-c dongles - HDMI slow unplug Both have a complete explanation in the code to schedule another run of the hotplug handler. It could have more checks to just trigger the retry in those two specific cases but why would sink signal a long pulse if there is no change? Also the drawback of running the hotplug handler again is really low and that could fix another cases that we are not aware. Also retrying for old DP ports(non-DDI) to make it consistent and not cause CI failures if those systems are connected to chamelium boards that will be used to simulate the issues reported in here. v2: Also retrying for old DP ports(non-DDI)(Imre) v4: Renamed INTEL_HOTPLUG_NOCHANGE to INTEL_HOTPLUG_UNCHANGED to keep it consistent(Rodrigo) Tested-by: Timo Aaltonen <tjaalton@ubuntu.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190712005343.24571-2-jose.souza@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 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.