From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [RFCv2 DP-typeC 2/6] drm/i915/dp: Reuse shared DPLL
	if	it exists already
Date: Wed, 14 Oct 2015 16:22:32 +0300
Message-ID: <87k2qp1t5z.fsf@intel.com>
References: <1444824013-23147-1-git-send-email-durgadoss.r@intel.com>
 <1444824013-23147-3-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 mga01.intel.com (mga01.intel.com [192.55.52.88])
 by gabe.freedesktop.org (Postfix) with ESMTP id E6ACC6E6D6
 for <intel-gfx@lists.freedesktop.org>; Wed, 14 Oct 2015 06:19:05 -0700 (PDT)
In-Reply-To: <1444824013-23147-3-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
List-Id: intel-gfx@lists.freedesktop.org
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==