[Bug 91393] [bdw edp] Screen Flickering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91393

--- Comment #61 from Mika Kahola <mika.kahola at intel.com> ---
Thank you Tom for the syslog. From the log the DP link training is completed
but for some reason the DP channel equalization fails. At this point we request
to do link training once again and now first we try first the drive current and
pre-emphasis levels from the previous link training. Instead of reusing these
values, we should restart the link training with zero drive current and
pre-emphasis levels. This is fixed at the 3rd patch of this series. 

Please, try out this series of patches on top of the drm-intel-nighly and
report back.

https://patchwork.freedesktop.org/patch/69394/
https://patchwork.freedesktop.org/patch/69395/
https://patchwork.freedesktop.org/patch/69396/

flux242 seems to have a clock recovery issue. This fix may provide a solution
for that as well.

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