From 76ad73e549ff39cbb235dae3a14902bb6ca12d53 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 8 Jul 2013 12:09:41 -0400
Subject: [PATCH] drm/radeon/dpm: implement vblank_too_short callback for
 cayman

Check if we can switch the mclk during the vblank time otherwise
we may get artifacts on the screen when the mclk changes.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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