Re: [PATCH] drm/i915: Remove unsafe i915.enable_rc6

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On Thu, Mar 30, 2017 at 05:10:55PM +0100, Chris Wilson wrote:
> On Thu, Mar 30, 2017 at 09:06:17AM -0700, Kelvin Gardiner wrote:
> > 
> > 
> > On 25/03/17 07:23, Chris Wilson wrote:
> > >It has been many years since the last confirmed sighting (and fix) of an
> > >RC6 related bug (usually a system hang). Remove the parameter to stop
> > >users from setting dangerous values.
> > 
> > This type of option can be useful for early debug and testing. Maybe
> > it can be moved to a Kconfig option.
> 
> That's a reasonable idea to allow overriding any and all (ideally) of
> intel_device_info. But usually a test branch will enable a feature it is
> using (as the first patch when testing, and then as the last patch when
> upstreaming).

Hmm, come to think of it, I used to have a poc to override this via a
user provided DT, which makes some testing easier, but still has the
same issue in allowing user override just obfuscated. Only a matter of
time before Gentoo forums start carrying complete DT overrides.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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