From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH 4/6] drm/i915: drm/i915: Check live status
 before reading edid
Date: Fri, 4 Sep 2015 16:49:44 +0200
Message-ID: <20150904144944.GC26318@phenom.ffwll.local>
References: <1441373176-22302-1-git-send-email-sonika.jindal@intel.com>
 <1441373176-22302-5-git-send-email-sonika.jindal@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 mail-wi0-f178.google.com (mail-wi0-f178.google.com
 [209.85.212.178])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 9C0DB6E1B9
 for <intel-gfx@lists.freedesktop.org>; Fri,  4 Sep 2015 07:47:02 -0700 (PDT)
Received: by wicge5 with SMTP id ge5so20110199wic.0
 for <intel-gfx@lists.freedesktop.org>; Fri, 04 Sep 2015 07:47:01 -0700 (PDT)
Content-Disposition: inline
In-Reply-To: <1441373176-22302-5-git-send-email-sonika.jindal@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: Sonika Jindal <sonika.jindal@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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