From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH 2/4] drm/i915: read sink_count dpcd always
Date: Tue, 01 Sep 2015 13:29:59 +0300
Message-ID: <87pp224el4.fsf@intel.com>
References: <1440665312-26698-1-git-send-email-sivakumar.thulasimani@intel.com>
 <1440665312-26698-3-git-send-email-sivakumar.thulasimani@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 mga02.intel.com (mga02.intel.com [134.134.136.20])
 by gabe.freedesktop.org (Postfix) with ESMTP id 8025A6E5BB
 for <intel-gfx@lists.freedesktop.org>; Tue,  1 Sep 2015 03:26:54 -0700 (PDT)
In-Reply-To: <1440665312-26698-3-git-send-email-sivakumar.thulasimani@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: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>, ville.syrjala@linux.intel.com, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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