[Bug 2085944] Re: drm/xe: Fix LNL getting wedged after idling

** Description changed:

filed upstream as
https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2902

[Impact]

Leaving a system with Lunar Lake idle for an hour or so will end up with
the display driver getting wedged requiring a reboot.

This is fixed upstream by this commit:

commit 22ef43c78647dd37b0dafe2182b8650b99dbbe59
Author: Badal Nilawar <badal.nilawar@intel.com>
Date: Thu Oct 17 16:44:10 2024 +0530

    drm/xe/guc/ct: Flush g2h worker in case of g2h response timeout

but in order to apply cleanly, we also need a set of three patches which
are already in v6.11.5

[Test case]

Boot a patched kernel on LNL, leave it idle for a couple of
- hours/overnight and check that it hasn't shat it's pants.
+ hours/overnight and check that it's still working normally.

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https://bugs.launchpad.net/bugs/2085944

Title:
drm/xe: Fix LNL getting wedged after idling

Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Oracular:
Confirmed

Bug description:
filed upstream as
https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2902

[Impact]

Leaving a system with Lunar Lake idle for an hour or so will end up
with the display driver getting wedged requiring a reboot.

This is fixed upstream by this commit:

commit 22ef43c78647dd37b0dafe2182b8650b99dbbe59
Author: Badal Nilawar <badal.nilawar@intel.com>
Date: Thu Oct 17 16:44:10 2024 +0530

    drm/xe/guc/ct: Flush g2h worker in case of g2h response timeout

but in order to apply cleanly, we also need a set of three patches
which are already in v6.11.5

[Test case]

Boot a patched kernel on LNL, leave it idle for a couple of
hours/overnight and check that it's still working normally.

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