From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [RFC CABC v3 PATCH 2/2] drm/i915: CABC support for
 backlight control
Date: Mon, 14 Sep 2015 11:41:36 +0200
Message-ID: <20150914094136.GA3383@phenom.ffwll.local>
References: <1441946868-4985-1-git-send-email-m.deepak@intel.com>
 <1441946868-4985-3-git-send-email-m.deepak@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 mail-wi0-f170.google.com (mail-wi0-f170.google.com
 [209.85.212.170])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 837DA6E717
 for <intel-gfx@lists.freedesktop.org>; Mon, 14 Sep 2015 02:38:52 -0700 (PDT)
Received: by wicfx3 with SMTP id fx3so124596454wic.0
 for <intel-gfx@lists.freedesktop.org>; Mon, 14 Sep 2015 02:38:51 -0700 (PDT)
Content-Disposition: inline
In-Reply-To: <1441946868-4985-3-git-send-email-m.deepak@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>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Deepak M <m.deepak@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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