[Bug 93697] [BAT SKL] sporadic WARNING backtrace: "DC6 already programmed to be enabled."

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93697

--- Comment #2 from Mika Kuoppala <mika.kuoppala at intel.com> ---
(In reply to Patrik Jakobsson from comment #1)
> It seems the DMC is setting the "Allow DC6" bit for us in DC_STATE_EN. It
> shouldn't so this looks like a firmware bug. We could remove the warning and
> just fix up the bits but lets see if I can figure out if this is reliably
> reproducable first. I haven't been able to see any bad effects of this bug
> aside from the warning.

Please also note:
https://bugs.freedesktop.org/show_bug.cgi?id=93768

The warning about DC6 being enabled might be also just a symptom of a prior
gpu death, but the problems starts immediately after.

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