[Bug 111909] commit c1132367 "Extract GT render sleep (rc6) management" prevents entering s2idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111909

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
So s2idle is S0, which is equivalent to our runtime suspend. Only it calls into
our pm hooks that are expecting to go S3+.

echo freeze > /sys/power/state

I think we just need to keep wait_for_idle in gem_suspend and move
intel_gt_pm_suspend to pm_late_suspend.

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