From: Jerome Glisse <jglisse@redhat.com>
Date: Fri, 17 Aug 2012 18:40:04 +0000 (-0400)
Subject: drm/radeon: avoid turning off spread spectrum for used pll
X-Git-Tag: v3.6-rc3~1^2~6^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5efcc76c13a745f98e7b6604d6aca49761be1970;p=pandora-kernel.git

drm/radeon: avoid turning off spread spectrum for used pll

If spread spectrum is enabled and in use for a given pll we
should not turn it off as it will lead to turning off display
for crtc that use the pll (this behavior was observed on chelsea
edp).

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
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