[Bug 49402] [snb dp dongle] DP-to-dual-HDMI (link_train issue?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49402

--- Comment #27 from Jani Nikula <jani.nikula at intel.com> ---
Created attachment 86402
  --> https://bugs.freedesktop.org/attachment.cgi?id=86402&action=edit
drm/i915: don't write training pattern set if it doesn't change

I had a look at this again. Here's a patch that fixes clock recovery (part of
link training) for me. It's on top of drm-intel-nightly branch of [1]. I don't
know if it does the right thing or whether it's strictly per the DP spec, but
it's worth a try. Please report whether it works for you. Also available at
dp-training-pattern branch of [2].

[1] git://people.freedesktop.org/~danvet/drm-intel
[2] git://gitorious.org/jani/drm.git

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