From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mika Kahola <mika.kahola@intel.com>
Subject: Re: [PATCH] drm/i915: Wait for vblank after register
 read
Date: Fri, 20 Apr 2018 14:15:35 +0300
Message-ID: <1524222935.16539.27.camel@intel.com>
References: <1524038216-22142-1-git-send-email-mika.kahola@intel.com>
 <87r2nbe18r.fsf@intel.com> <1524206549.16539.24.camel@intel.com>
 <87lgdie17i.fsf@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 mga17.intel.com (mga17.intel.com [192.55.52.151])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 89C8D6E230
 for <intel-gfx@lists.freedesktop.org>; Fri, 20 Apr 2018 11:15:37 +0000 (UTC)
In-Reply-To: <87lgdie17i.fsf@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: Jani Nikula <jani.nikula@linux.intel.com>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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