From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: [Intel-gfx] PCH reference clock cleanups
Date: Mon, 3 Oct 2011 16:21:08 -0700
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To: Keith Packard <keithp@keithp.com>
Cc: Paulo Zanoni <przanoni@gmail.com>, Dave Airlie <airlied@redhat.com>, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
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On Mon, 03 Oct 2011 16:18:48 -0700
Keith Packard <keithp@keithp.com> wrote:

> On Mon, 3 Oct 2011 14:14:23 -0700, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> 
> > Now... is keeping the various refclks enabled costing us any power?
> > IOW, should we be trying to disable them when everything has been
> > DPMS'd off too?
> 
> That's the same as tracking usage and enabling/disabling on the fly as
> modes are set. I think it's possible, but I'd like to have the 'simpler'
> fix present before we try a power saving move.

Agreed; fortunately shutting everything off when no outputs are
active should be simpler than trying flip the bits on & off every mode
set. :)

-- 
Jesse Barnes, Intel Open Source Technology Center