From mboxrd@z Thu Jan  1 00:00:00 1970
From: Imre Deak <imre.deak@intel.com>
Subject: Re: [PATCH] drm/i915: Clear PIPE.STAT before IIR on
	VLV/CHV
Date: Tue, 01 Sep 2015 14:19:35 +0300
Message-ID: <1441106375.6078.21.camel@intel.com>
References: <1439573072-8927-1-git-send-email-chris@chris-wilson.co.uk>
Reply-To: imre.deak@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 mga09.intel.com (mga09.intel.com [134.134.136.24])
 by gabe.freedesktop.org (Postfix) with ESMTP id 45FB06E42C
 for <intel-gfx@lists.freedesktop.org>; Tue,  1 Sep 2015 04:19:38 -0700 (PDT)
In-Reply-To: <1439573072-8927-1-git-send-email-chris@chris-wilson.co.uk>
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: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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