drm/radeon: update wait_for_vblank for evergreen+
authorAlex Deucher <alexander.deucher@amd.com>
Tue, 9 Apr 2013 22:49:59 +0000 (18:49 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 11 May 2013 14:18:31 +0000 (07:18 -0700)
commitf046835bd06046b36e114709dae7a28e9bdc770b
tree51889244f8fb7fff71539e3e490e15d27afe1ed3
parent4bafb0c54acae09a8d3774512c953c4f7a2074b9
drm/radeon: update wait_for_vblank for evergreen+

commit 10257a6d8359c41407eb26b7ad7bf710a7e00155 upstream.

Properly wait for the next vblank region.  The previous
code didn't always wait long enough depending on the timing.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/radeon/evergreen.c