[Bug 99575] [ilk bisected] "drm/i915: Type safe register read/write" -> poor/nonexistent IPS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99575

--- Comment #22 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
I gave this a quick whirl on my ILK but didn't see any performance changes
whatsoever. Long ago I tried to figure out what IPS was doing on that
particular machine, and at the time it seemed to be always thermally limited as
soon as the GPU became active. So without tracing the IPS stuff again I can't
actually say with 100% certainty that there isn't any change in the behaviour.
I might do that at some point if I get bored enough. I did re-read the patch
several times, but I still can't spot any functional changes in there.

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