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Matt Roper 2a040f0d08 drm/i915/tgl: Initialize multicast register steering for workarounds
Even though the bspec is missing gen12 register details for the MCR
selector register (0xFDC), this is confirmed by hardware folks to be a
mistake; the register does exist and we do indeed need to steer
multicast register reads to an appropriate instance the same as we did
on gen11.

Note that despite the lack of documentation we were still using the MCR
selector to read INSTDONE and such in read_subslice_reg() too.

Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200414211118.2787489-4-matthew.d.roper@intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
History 2020-04-15 15:29:20 -07:00
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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.