[Bug 101167] [BAT][SKL] igt at kms_flip@basic-flip-vs-dpms produces a dmesg-fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101167

--- Comment #27 from Manasi <manasi.d.navare at intel.com> ---
I still think that the real reason here for the link failure is the aux ch
timeouts and in that case the link training should not fallback and reduce link
rate/lane count. 

Also if we add !is_edp to our fallback algorithm, it should behave exactly like
it did before the patch for eDP, so the modes should not get pruned and the
test should pass. Did it in this case?

Also in general for IGT to handle the link failures, the kernel does not prune
any mode itself after link failure, all it does is reduces link rate/lane
count. So if IGT does a new modeset at the same mode again and if that mode is
too high for available link bw, it will get pruned. In that case, IGT has to do
a full modeset on a lower mode and if no mode is available, yes the IGT will
fail/skip the test. 

Manasi

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170607/cb792047/attachment.html>