From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Tc, Jenny" <jenny.tc@intel.com>
Subject: Re: [PATCH] drm/i915: Use AUX for backlight only if eDP
 1.4 or later
Date: Thu, 20 Jul 2017 10:06:41 +0000
Message-ID: <20ADAB092842284E95860F279283C5645641F60E@BGSMSX104.gar.corp.intel.com>
References: <1500460169-8155-1-git-send-email-jenny.tc@intel.com>
 <1500489783.20458.27.camel@dk-H97M-D3H> <87y3rjo3lf.fsf@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
 by gabe.freedesktop.org (Postfix) with ESMTPS id D31CD6E675
 for <intel-gfx@lists.freedesktop.org>; Thu, 20 Jul 2017 10:06:46 +0000 (UTC)
In-Reply-To: <87y3rjo3lf.fsf@intel.com>
Content-Language: en-US
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://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: <https://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Jani Nikula <jani.nikula@linux.intel.com>, "Pandiyan, Dhinakaran" <dhinakaran.pandiyan@intel.com>
Cc: "puthik@chromium.org" <puthik@chromium.org>, "Vetter,
 Daniel" <daniel.vetter@intel.com>, "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>, "Weinehall, David" <david.weinehall@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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