From: Alex Deucher <alexdeucher@gmail.com>
Date: Mon, 4 Oct 2010 21:13:01 +0000 (-0400)
Subject: drm/radeon/kms: rework spread spectrum handling
X-Git-Tag: v2.6.37-rc1~92^2~23^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba032a58d1f320039e7850fb6e8651695c1aa571;p=pandora-kernel.git

drm/radeon/kms: rework spread spectrum handling

This patch reworks spread spectrum handling to enable it
properly on lvds and DP/eDP links.  It also fixes several
bugs in the old spread spectrum code.

- Use the ss recommended reference divider if available
when calculating the pll
- Use the proper ss command tables on pre-DCE3 asics
- Avoid reading past the end of the ss info tables
- Enable ss on evergreen asics (lvds, dp, tmds)
- Enable ss on DP/eDP links

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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