From 12dfc843f43efe14d0cfc7a52753d971a0cc759d Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Thu, 14 Apr 2011 19:07:34 -0400
Subject: [PATCH] drm/radeon/kms: adjust evergreen display watermark setup

This patch fixes two issues:
- A disabled crtc does not use any lb, so return 0 for
lb size.  This makes the display priority calculation
more exact.
- Only use 1/2 and whole lb partitions. Using smaller
partitions can cause underflow to one of the displays
if you have multiple large displays on the same lb.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=34534

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