[Intel-gfx] [PATCH 1/1] drm/i915: allow to select rc6 modes via kernel parameter

[Eugeni Dodonov]

On Mon, Feb 13, 2012 at 06:33, Ben Widawsky <ben at bwidawsk.net> wrote:

>  > We checked with Jesse, and these states are independent.. So it should
> > be possible to have RC6p and not plain RC6.
>
> I'm sure it's possible, the question was, does it ever make sense?
>

One theory we had in mind for this is that the issue could be caused by
RC6, but avoided by more aggressive RC6 states. There was mostly motivated
by one case which said that deep rc6 was working while rc6+deep rc6 were
giving issues.

SNB with RC6 seems to be stable now, but perhaps it would be interesting to
leave this possibility, so in case we ever observe something similar on any
other GEN arch we'd have a quick way to debug.

-- 
Eugeni Dodonov
<http://eugeni.dodonov.net/>
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