(In reply to Tom Furniss from comment #69)
> Created attachment 120919 [details]
> syslog for 3 patches with increased debug
>
> Hi Mika
>
> No problem. I applied the following patches to the latest drm-intel-nightly:
> https://patchwork.freedesktop.org/patch/69394/
> https://patchwork.freedeskt
Created attachment 120893
DP debugging
Tom, I would bother you again to provide some debugging info. From the
dmesg you sent it seems that you are experiencing a lot of hpd
interrupts. When that happens the driver checks if the DP channel
equalization is still ok. On your case, channel equalizatio
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 o
(In reply to Andrew Merzlyakov from comment #52)
> I've experienced exactly the same problem, as Tom Furniss described.
> Kernel version: 4.2.6-301.fc23.x86_64
> dmesg with drm.debug=14 attached.
> I'm failed to apply patches, files structure in drivers/gpu/drm/i915/ is
> slightly different.
> If
Created attachment 120493
Disable fast link training when resuming
Tom - thank you for you feedback and logs. I think I need to disable the
fast link training feature when resuming from the suspend state. This
patch does just that in case of DP or eDP connectors. Please, test this
patch if this wo
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