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3f2e9ed0b2
Registering an output for a non-existent port (on a given SKU) can lead to problems when trying to use the port, for instance timeouts during power well enabling. Since there are no strap bits for port detection we have to rely on VBT for this, so do that here. There are no known SKUs where any of the A-E ports are non-existent, so to reduce the likelihood of breakage due to incorrect VBT information, do this detection only for port F (which is known to be missing on some ICL SKUs). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108915 Cc: Mika Kahola <mika.kahola@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181220132604.25222-2-imre.deak@intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
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.