From 9c0127004ff4e891e475d6dfb22ddcbaeca6ec9b Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Mon, 7 Jul 2014 15:32:53 +0200
Subject: [PATCH] drm/tegra: dc: Add powergate support

Both display controllers are in their own power partition. Currently the
driver relies on the assumption that these partitions are on (which is
the hardware default). However some bootloaders may disable them, so the
driver must make sure to turn them back on to avoid hangs.

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