From mboxrd@z Thu Jan  1 00:00:00 1970
From: Puthikorn Voravootivat <puthik@chromium.org>
Subject: [PATCH RESEND v11 3/3] drm/i915: Add option to support
	dynamic backlight via DPCD
Date: Mon,  5 Jun 2017 14:56:07 -0700
Message-ID: <20170605215607.27766-4-puthik@chromium.org>
References: <20170605215607.27766-1-puthik@chromium.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
In-Reply-To: <20170605215607.27766-1-puthik@chromium.org>
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: intel-gfx@lists.freedesktop.org, Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>, Jani Nikula <jani.nikula@linux.intel.com>, Daniel Vetter <daniel@ffwll.ch>
Cc: Puthikorn Voravootivat <puthik@chromium.org>, dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org
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