From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751744Ab1JCXVW (ORCPT ); Mon, 3 Oct 2011 19:21:22 -0400 Received: from oproxy4-pub.bluehost.com ([69.89.21.11]:53154 "HELO oproxy4-pub.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751170Ab1JCXVU (ORCPT ); Mon, 3 Oct 2011 19:21:20 -0400 Date: Mon, 3 Oct 2011 16:21:08 -0700 From: Jesse Barnes To: Keith Packard Cc: Paulo Zanoni , Dave Airlie , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [Intel-gfx] PCH reference clock cleanups Message-ID: <20111003162108.07c6b9bb@jbarnes-desktop> In-Reply-To: References: <1317103906-4649-1-git-send-email-keithp@keithp.com> <20111003141423.0ff5447c@jbarnes-desktop> X-Mailer: Claws Mail 3.7.6 (GTK+ 2.22.0; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.161.37.189 authed with jbarnes@virtuousgeek.org} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 03 Oct 2011 16:18:48 -0700 Keith Packard wrote: > On Mon, 3 Oct 2011 14:14:23 -0700, Jesse Barnes 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