From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 17 Jul 2012 18:02:31 +0000 (-0400)
Subject: drm/radeon: update rptr saving logic for memory buffers
X-Git-Tag: v3.6-rc1~83^2~34^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89d35807fb0fe53b84e88e759cc39107a6195e5f;p=pandora-kernel.git

drm/radeon: update rptr saving logic for memory buffers

Add support for using memory buffers rather than
scratch registers.  Some rings may not be able to
write to scratch registers.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
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