From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clint Taylor <clinton.a.taylor@intel.com>
Subject: Re: [PATCH] drm/i915: eDP HPD connected check to reduce
 T3 time
Date: Tue, 22 Sep 2015 14:34:02 -0700
Message-ID: <5601C94A.10004@intel.com>
References: <1442941779-13633-1-git-send-email-clinton.a.taylor@intel.com>
 <20150922172753.GT26517@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga14.intel.com (mga14.intel.com [192.55.52.115])
 by gabe.freedesktop.org (Postfix) with ESMTP id F392C6E668
 for <Intel-gfx@lists.freedesktop.org>; Tue, 22 Sep 2015 14:36:45 -0700 (PDT)
In-Reply-To: <20150922172753.GT26517@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: =?windows-1252?Q?Ville_Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Cc: Intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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