[Bug 102403] [BAT][BXT] loads of "*ERROR* Atomic update failure on pipe A" when using a DSI panel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102403

--- Comment #9 from Vidya Srinivas <vidya.srinivas at intel.com> ---
We executed the test in a loop for around 4 hours with a delay of 5 sec between
each iteration. We couldn't reproduce this issue on our end.

Is there any specific scenario (BKM) to reproduce it? Does it happen
consistently or its one-off/random kind of an issue?

We tested with below configuration:

DSI APL with AUO panel (1920x1200p)
branch drm-tip
top commit:
commit 247cb84af034b8e90ecd22cd69adb13a7a305350
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Thu Oct 5 09:44:50 2017 +0300

    drm-tip: 2017y-10m-05d-06h-44m-09s UTC integration manifest

As per our understanding, this particular issue is not related to the evasion
issues caused by scanline reporting and is more of a modeset/flip
sequence/locking problem related to cursor.

So, though the error message is similar, the cause for the same is different.
Hence it will require a separate debug. 

Note: There have been some fixes related to cursor updates by Maarten. Can
Maarten also have a look at it in parallel as to why this cursor test is
failing? Any pointers would be helpful based on the past debug.

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