From mboxrd@z Thu Jan  1 00:00:00 1970
From: Puthikorn Voravootivat <puthik@chromium.org>
Subject: [PATCH v10 3/3] drm/i915: Set PWM divider to match
	desired frequency in vbt
Date: Fri, 26 May 2017 18:42:09 -0700
Message-ID: <20170527014209.186331-4-puthik@chromium.org>
References: <20170527014209.186331-1-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: <20170527014209.186331-1-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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