drm/radeon: update line buffer allocation for dce4.1/5
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 19 Aug 2013 15:06:50 +0000 (11:06 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Fri, 30 Aug 2013 20:31:00 +0000 (16:31 -0400)
commit0b31e02363b0db4e7931561bc6c141436e729d9f
treeaa4e98b8d2efcedb78561549b4a37e72dd08be65
parente5b9e7503eb1f4884efa3b321d3cc47806779202
drm/radeon: update line buffer allocation for dce4.1/5

We need to allocate line buffer to each display when
setting up the watermarks.  Failure to do so can lead
to a blank screen.  This fixes blank screen problems
on dce4.1/5 asics.

Based on an initial fix from:
Jay Cornwall <jay.cornwall@amd.com>

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/evergreen.c
drivers/gpu/drm/radeon/evergreend.h