From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH] drm/i915/dp: Validate cached link rate and
	lane count before retraining
Date: Mon, 27 Mar 2017 18:26:06 +0300
Message-ID: <87o9wm91wx.fsf@intel.com>
References: <1490310692-24468-1-git-send-email-manasi.d.navare@intel.com>
 <20170327134004.GL30290@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 mga02.intel.com (mga02.intel.com [134.134.136.20])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 4988E89180
 for <intel-gfx@lists.freedesktop.org>; Mon, 27 Mar 2017 15:26:17 +0000 (UTC)
In-Reply-To: <20170327134004.GL30290@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 =?utf-8?B?U3lyasOkbMOk?= <ville.syrjala@linux.intel.com>, Manasi Navare <manasi.d.navare@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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