[Bug 100572] [SKL dmc] Headless mode media transcoding is 20-30% slower comparing to connected monitor use case

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100572

--- Comment #32 from Imre Deak <imre.deak at intel.com> ---
(In reply to Tvrtko Ursulin from comment #31)
> We also seem to keep DPLL0 enabled at all times since according to Ville if
> we turn it off, DMC turns it back on again. It is possible DPLL0 being on
> prevents DC6?

No, DPLL0 being on all the time from the driver's POV is normal. DMC will turn
it off when transitioning to DC5/6 and turn it back on when exiting these
states.

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