From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm/i915/crt: Only support DPMS On/Off with the PCH registers Date: Tue, 10 Apr 2012 15:12:35 +0100 Message-ID: <1334067159_346690@CP5-2952> References: <1334046930-27924-1-git-send-email-chris@chris-wilson.co.uk> <4F8433A6.7020202@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from fireflyinternet.com (smtp.fireflyinternet.com [109.228.6.236]) by gabe.freedesktop.org (Postfix) with ESMTP id D79709F388 for ; Tue, 10 Apr 2012 07:12:40 -0700 (PDT) In-Reply-To: <4F8433A6.7020202@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Adam Jackson Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Tue, 10 Apr 2012 09:20:38 -0400, Adam Jackson wrote: > On 4/10/12 4:35 AM, Chris Wilson wrote: > > As part of the PCH split, the ability to control CRT standby/suspend > > states was defeatured; the bits are now marked reserved and apparently > > have no effect. > > Are the intermediate states even tested? I have vague memories of them > not working. I'd be just as happy to see them aliased to Off. All I can say is that QA reported that ILK+ suspend/standby did not work with an external VGA monitor. However, that doesn't say whether or not they ever tested earlier generations if it took a few years to spot the behavioural regression. -Chris -- Chris Wilson, Intel Open Source Technology Centre