[Bug 69693] [BYT]igt/kms_flip: DP link train fail due to IOSF sideband fabric timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69693

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |REOPENED

--- Comment #24 from lu hua <huax.lu at intel.com> ---
(In reply to comment #23)
> Can I get extra confirmation that current -nightly doesn't work by itself?
> 
> I don't like that patch that I posted to the other bug, it theoretically
> shouldn't be needed...

Test on latest -nightly kernel.

If attach VGA, it works well.

If attach edp, The error still exists.
dmesg -r | egrep "<[1-3]>" |grep drm
<3>[   60.106871] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
<3>[   60.995917] [drm:intel_dp_complete_link_train] *ERROR* failed to train
DP, aborting
<3>[   62.019355] [drm:intel_pipe_config_compare] *ERROR* mismatch in
has_dp_encoder (expected 1, found 0)

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