From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH v2] drm/i915: Add debugfs to read any DPCD
	register
Date: Thu, 16 Apr 2015 17:07:00 +0300
Message-ID: <87egnkp3p7.fsf@intel.com>
References: <1428493301-20293-1-git-send-email-durgadoss.r@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 24D876EA5B
 for <intel-gfx@lists.freedesktop.org>; Thu, 16 Apr 2015 07:08:30 -0700 (PDT)
In-Reply-To: <1428493301-20293-1-git-send-email-durgadoss.r@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: Durgadoss R <durgadoss.r@intel.com>, intel-gfx@lists.freedesktop.org
Cc: "Syrjala, Ville" <ville.syrjala@intel.com>, "Zanoni,
 Paulo R" <paulo.r.zanoni@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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