From d29827484b9cf6026506a0e376fb5d246580ffd8 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Thu, 22 Jan 2015 08:48:25 +0100
Subject: [PATCH] drm/tegra: dc: Check for valid parent clock

Check that the desired parent clock is indeed a valid parent for the
display controller clock. This is purely cosmetic at this point since
the parent clocks are specified in DT and all the currently defined
parents are in fact valid parents of the display controller clock.

Signed-off-by: Thierry Reding <treding@nvidia.com>
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