From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mika Kahola <mika.kahola@intel.com>
Subject: Re: [PATCH] drm/i915: Workaround VLV/CHV DSI scanline
 counter hardware fail
Date: Wed, 17 May 2017 12:49:33 +0300
Message-ID: <1495014573.6603.76.camel@intel.com>
References: <20161215174734.28779-1-ville.syrjala@linux.intel.com>
Reply-To: mika.kahola@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 mga05.intel.com (mga05.intel.com [192.55.52.43])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 106956E3D0
 for <intel-gfx@lists.freedesktop.org>; Wed, 17 May 2017 09:50:20 +0000 (UTC)
In-Reply-To: <20161215174734.28779-1-ville.syrjala@linux.intel.com>
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: ville.syrjala@linux.intel.com, intel-gfx@lists.freedesktop.org
Cc: Jonas Aaberg <cja@gmx.net>, stable@vger.kernel.org
List-Id: intel-gfx@lists.freedesktop.org
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