From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Subject: Re: [PATCH v1] drm/i915: Skip modeset for cdclk changes
 if possible
Date: Tue, 28 Aug 2018 15:39:31 +0300
Message-ID: <20180828123931.GV5565@intel.com>
References: <1535395832-32264-1-git-send-email-abhay.kumar@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 mga18.intel.com (mga18.intel.com [134.134.136.126])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 88F586E054
 for <intel-gfx@lists.freedesktop.org>; Tue, 28 Aug 2018 12:39:34 +0000 (UTC)
Content-Disposition: inline
In-Reply-To: <1535395832-32264-1-git-send-email-abhay.kumar@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: Abhay Kumar <abhay.kumar@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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