From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH] drm/i915: do not disable backlight on
 vgaswitcheroo switch off
Date: Wed, 7 Aug 2013 09:52:22 +0200
Message-ID: <20130807075222.GR22035@phenom.ffwll.local>
References: <1374751890-9194-1-git-send-email-jani.nikula@intel.com>
	<87y58eyq1x.fsf@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org>
Received: from mail-we0-f173.google.com (mail-we0-f173.google.com
	[74.125.82.173])
	by gabe.freedesktop.org (Postfix) with ESMTP id 0DAE8E66DD
	for <intel-gfx@lists.freedesktop.org>;
	Wed,  7 Aug 2013 00:52:15 -0700 (PDT)
Received: by mail-we0-f173.google.com with SMTP id x55so1233243wes.18
	for <intel-gfx@lists.freedesktop.org>;
	Wed, 07 Aug 2013 00:52:15 -0700 (PDT)
Content-Disposition: inline
In-Reply-To: <87y58eyq1x.fsf@intel.com>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=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: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org

On Wed, Aug 07, 2013 at 09:26:34AM +0300, Jani Nikula wrote:
> On Thu, 25 Jul 2013, Jani Nikula <jani.nikula@intel.com> wrote:
> > On muxed systems, the other vgaswitcheroo client may depend on i915 to
> > handle the backlight. We began switching off the backlight since
> >
> > commit a261b246ebd552fd5d5a8ed84cc931bb821c427f
> > Author: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Date:   Thu Jul 26 19:21:47 2012 +0200
> >
> >     drm/i915: disable all crtcs at suspend time
> >
> > breaking backlight on discreet graphics in (some) muxed systems.
> >
> > Keep the backlight on when the state is changed through vgaswitcheroo.
> >
> > Note: The alternative would be to add a quirk table to achieve the same
> > based on system identifiers, but AFAICS it would asymptotically approach
> > effectively the same as this patch as more IDs are added, but with the
> > maintenance burden of the quirk table.
> >
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=55311
> 
> Tested-by: Fede <fedevx@yahoo.com>
> Tested-by: Aximab <laurent.debian@gmail.com>
> 
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59785
> 
> Tested-by: sfievet <sebastien.fievet@free.fr>

Picked up for -fixes (with a cc: stable), thanks for the patch.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch