[Intel-gfx] [PATCH 2/2] drm/i915: enable plain RC6 on Sandy Bridge by default

Chris Wilson chris at chris-wilson.co.uk
Sat Feb 11 13:59:25 CET 2012

On Sat, 11 Feb 2012 10:34:15 -0200, Eugeni Dodonov <eugeni.dodonov at intel.com> wrote:
> This is yet another chapter in the ongoing saga of bringing RC6 to Sandy
> Bridge machines by default.
> Now that we have discovered that RC6 issues are triggered by RC6+ state,
> let's try to disable it by default. Plain RC6 is the one responsible for
> most energy savings, and so far it haven't given any problems - at least,
> none we are aware of.
> So with this, when i915_enable_rc6=-1 (e.g., the default value), we'll
> attempt to enable plain RC6 only on SNB. For Ivy Bridge, the behavior
> stays the same as always - we enable both RC6 and deep RC6.

We appear to be lacking a bunch of tested-bys for what we proclaim to
have been tested.

Chris Wilson, Intel Open Source Technology Centre

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