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a133c6988f
According to the DP spec a DPTX must support vswing/pre-emphasis up to and including level 2. Level 3 is optional (actually DP 1.4a seems to make even level 3 mandatory for HBR2/3, while leaving it optional for RBR/HBR1). WARN if out encoders' .voltage_max()/.preemph_max() return an illegal value. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200709145845.18118-1-ville.syrjala@linux.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.