[Intel-gfx] [PATCH] drm/i915: add render standby support

Jesse Barnes jbarnes at virtuousgeek.org
Thu Oct 8 18:46:33 CEST 2009

On Thu, 8 Oct 2009 12:04:32 +0200
Erik Andrén <erik.andren at gmail.com> wrote:

> 2009/10/7 Jesse Barnes <jbarnes at virtuousgeek.org>:
> > Render standy allows the GPU to power down the render unit when
> > idle. In order for this to work, it needs a page of graphics memory
> > to save state.  This patch allocates that page and enables the
> > feature on supported chipsets.
> >
> > Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> > ---
> Do you have any figures on how much power this saves?

I haven't done any measurements yet.  I had to do this as part of some
other work and figured I'd get it out there after some light testing.

Jesse Barnes, Intel Open Source Technology Center

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