[Bug 107893] [Gemini Lake] HDMI 2.0 compliance test failed - HF1-34 Video timing YCbCr 420 deep color

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107893

--- Comment #6 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
The EDIDs seem to have a video format preference data block. That is something
we don't parse and thus we don't mark the VIC 102 as the preferred mode. Which
may explain the failure.

In drm we can only really have a single preferred mode, so I guess we should
only pick up the first entry from the preference data block. If we really want
to sort the modes based on multiple entries in the preference data block we
would have to extend our internal mode structure with some kind of preference
number rather than just relying on a single flag. Not impossible, but a bit
more work than just grabbing the first mode from the preference data block and
marking it as the preferred mode.

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