[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 #8 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Kenneth C from comment #7)
> (In reply to Chris Wilson from comment #6)
> >> 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)?

So the main difference with S0 is that the pci device itself is not powered
down. But now that we can detect S0, we should be able to call into
intel_runtime_suspend() which should do as put the device into its most power
conserving state. Worth a shot.

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