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

Public bug reported:

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 also 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.

** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed

** Affects: linux (Ubuntu Oracular)
Importance: Undecided
Status: Confirmed

** 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 e5152723380404acb8175e0777b1cea57f319a01
+ 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
+     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 also in v6.11.5
+ but in order to apply cleanly, we also need a set of three patches which
+ are also 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.

** Also affects: linux (Ubuntu Oracular)
Importance: Undecided
Status: New

** Changed in: linux (Ubuntu)
Status: New => Confirmed

** Changed in: linux (Ubuntu Oracular)
Status: New => Confirmed

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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 also 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.

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