[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 #7 from Kenneth C <kenny at panix.com> ---
(In reply to Chris Wilson from comment #6)
> Ok, so the device/base/power treats S0 as a full suspend, so we don't have
> any differentiates in our callbacks. However, I did find
> pm_suspend_target_state we can use. See
> https://patchwork.freedesktop.org/patch/335634/?series=67667&rev=2

Thank you. I've carved out "drm-next" from Linus' tip for my machine to get me
working reliably, but I still have the branch with drm-tip, and will try this
later today.

Also:

>> S0 (s2idle) where the device is kept awake but needs to be in a low power mode 

My laptop is plagued with this "s01x" idle, which drains the battery quickly
when in "suspend" even under the best case (which apparently Linux can't enter,
at least on my hardware). You know this better than I, but is it possible to
NOT keep the i915 awake in this mode (or does that mean a kind of restore as in
a hibernate on resume)?

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