From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lyude Paul <lyude@redhat.com>
Subject: [PATCH 12/26] drm/dp_mst: Refactor drm_dp_mst_handle_down_rep()
Date: Wed, 17 Jul 2019 21:42:35 -0400
Message-ID: <20190718014329.8107-13-lyude@redhat.com>
References: <20190718014329.8107-1-lyude@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28])
 by gabe.freedesktop.org (Postfix) with ESMTPS id AE2C76E2D3
 for <dri-devel@lists.freedesktop.org>; Thu, 18 Jul 2019 01:44:37 +0000 (UTC)
In-Reply-To: <20190718014329.8107-1-lyude@redhat.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: dri-devel@lists.freedesktop.org
Cc: Maxime Ripard <maxime.ripard@bootlin.com>, Sean Paul <sean@poorly.run>, linux-kernel@vger.kernel.org, David Airlie <airlied@linux.ie>, Juston Li <juston.li@intel.com>, Harry Wentland <hwentlan@amd.com>
List-Id: dri-devel@lists.freedesktop.org
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