From b18915379071b31ea819a36ca67761620decba06 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Tue, 11 Feb 2014 21:12:27 +0400
Subject: [PATCH] drm/tegra: Add guard to avoid double disable/enable of RGB
 outputs

Add guard to check whether RGB output is already enabled in the way it's
done for HDMI output. Fixes possible hang on trying to disable output twice
(first time during driver probe and second on fb registering).

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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