[Bug 106678] [CI] igt@* - dmesg-warn/fail - *ERROR* Potential atomic update failure on pipe [ABC]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106678

Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|luis.strano at intel.com       |dhinakaran.pandiyan at intel.c
                   |                            |om
             Status|NEEDINFO                    |ASSIGNED
                 CC|                            |dhinakaran.pandiyan at intel.c
                   |                            |om

--- Comment #7 from Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com> ---
"drm/i915/psr: vbt change for psr" changed the exit link training time from 500
us to 2.5 ms on these machines. The frame counter is possibly stuck for a
longer duration now and pipe_update_start() is not aware that the counter is
stuck and warns.

We've been discussing this problem for some time now and the VBT change appears
to have made it more likely to occur.

Related discussion can be found in the April email archives under:
"[Intel-gfx] [RFC] drm/i915: Rework "Potential atomic update error" to handle
PSR exit" 

I wish this was caught in pre-merge instead of these drm-tip runs.

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