From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Tue, 24 Sep 2013 18:26:24 +0000 (+0300)
Subject: drm/i915: Make sure we respect n.max on VLV
X-Git-Tag: v3.13-rc1~76^2~68^2~123
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27e639bf024a0706015dbb348eb32619a9bb9329;p=pandora-kernel.git

drm/i915: Make sure we respect n.max on VLV

We limit the maximum n divider value in order to make sure the PLL's
reference inout is at least 19.2 MHz. I assume that is done to satisfy
some hardware requirement.

However we never check whether that calculated limit is below the
maximum supoorted N divider value (7). In practice that is always true
since we only support 100 MHz reference clock, but making the code
safe against higher reference clocks seems like a reasoanble thing to
do.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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