From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yu Dai <yu.dai@intel.com>
Subject: Re: [PATCH v4 4/6] drm/i915/guc: (re)initialise
 doorbell h/w when enabling GuC submission
Date: Wed, 13 Apr 2016 10:50:23 -0700
Message-ID: <570E86DF.2050909@intel.com>
References: <1460049678-21918-1-git-send-email-david.s.gordon@intel.com>
 <1460049678-21918-5-git-send-email-david.s.gordon@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 mga11.intel.com (mga11.intel.com [192.55.52.93])
 by gabe.freedesktop.org (Postfix) with ESMTP id 163366E936
 for <intel-gfx@lists.freedesktop.org>; Wed, 13 Apr 2016 17:51:29 +0000 (UTC)
In-Reply-To: <1460049678-21918-5-git-send-email-david.s.gordon@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: Dave Gordon <david.s.gordon@intel.com>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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