From: Alex Deucher <alexdeucher@gmail.com>
Date: Fri, 8 Jul 2011 15:44:56 +0000 (-0400)
Subject: drm/radeon/kms: clean up multiple crtc handling for evergreen+ (v2)
X-Git-Tag: v3.0-rc7~14^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7eff394670366a42935bfbaef67a6f7185627d7;p=pandora-kernel.git

drm/radeon/kms: clean up multiple crtc handling for evergreen+ (v2)

evergreen+ asics have 2-6 crtcs.  Don't access crtc registers
for crtc regs that don't exist as they have very high latency
and may cause problems on some asics.  The previous code missed
a few cases and was not fine grained enough (missed the 4 crtc
case for example).

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=38800

v2: fix typo noticed by Chris Bandy <cbandy@jbandy.com>

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Reviewed-by: Michel Dänzer <michel@daenzer.net>
Tested-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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