Commits
Dave Airlie committed 6546bf6d6cb
drm/radeon: fix r600 writeback setup. This fixes 2 bugs: 1. the AGP calculation wasn't consistent with the PCI(E) calc for the RPTR_ADDR registers. This consolidates the writes and fixes it up. 2. The scratch address was being incorrectly calculated, this breaks it out into a lot more linear steps. Signed-off-by: Dave Airlie <airlied@redhat.com>