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commitf965b68188upstream. Init value of some display vregs rea inherited from host pregs. When host display in different status, i.e. all monitors unpluged, different display configurations, etc., GVT virtual display setup don't consistent thus may lead to guest driver consider display goes malfunctional. The added init vreg values are based on PRMs and fixed by calcuation from current configuration (only PIPE_A) and the virtual EDID. Fixes:04d348ae3f("drm/i915/gvt: vGPU display virtualization") Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by: Colin Xu <colin.xu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20200508060506.216250-1-colin.xu@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.