[Bug 96321] [CHV] HDMI detection fails, black screen after boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96321

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #5 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Based on the dmesg it looks like the board straps are telling us that port D is
the only thing present, but the VBT says port C is the only thing present. Also
the EDID seems to be available on the DDC pins used for for port C.

I'd like to see what the straps say, and I'd like to see what the BIOS enables,
so can you boot without loading i915.ko, with display already enabled by BIOS
preferably, and run 'intel_reg dump --spec=<path to spec files>/cherryview'

The spec files for the tool are under tools/registers/ in igt source tree, and
should get installed in <prefix>/share/intel-gpu-tools/registers/ if you've
installed it.

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