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f49108d0e0
The bspec tells us 'Program SHPD_FILTER_CNT with the "500 microseconds adjusted" value before enabling hotplug detection' on CNP+. We haven't been touching this register at all thus far, but we should probably follow the bspec's guidance. The register also exists on LPT and SPT, but there isn't any specific guidance I can find on how we should be programming it there so let's leave it be for now. Bspec: 4342 Bspec: 31297 Bspec: 8407 Bspec: 49305 Bspec: 50473 Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191127221314.575575-3-matthew.d.roper@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.