releases/3.4.2/drm-radeon-fix-hd6790-hd6570-backend-programming.patch

   1 From 95c4b23ec4e2fa5604df229ddf134e31d7b3b378 Mon Sep 17 00:00:00 2001
   2 From: Jerome Glisse <jglisse@redhat.com>
   3 Date: Thu, 31 May 2012 19:00:24 -0400
   4 Subject: drm/radeon: fix HD6790, HD6570 backend programming
   5
   6 From: Jerome Glisse <jglisse@redhat.com>
   7
   8 commit 95c4b23ec4e2fa5604df229ddf134e31d7b3b378 upstream.
   9
  10 Without this bit sets we get broken rendering and
  11 lockups.
  12
  13 fglrx sets this bit.
  14
  15 Bugs that should be fixed by this patch :
  16 https://bugs.freedesktop.org/show_bug.cgi?id=49792
  17 https://bugzilla.kernel.org/show_bug.cgi?id=43207
  18 https://bugs.freedesktop.org/show_bug.cgi?id=39282
  19
  20 Signed-off-by: Jerome Glisse <jglisse@redhat.com>
  21 Acked-by: Alex Deucher <alexander.deucher@amd.com>
  22 Signed-off-by: Dave Airlie <airlied@redhat.com>
  23 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  24
  25 ---
  26  drivers/gpu/drm/radeon/evergreen.c |    4 ++--
  27  1 file changed, 2 insertions(+), 2 deletions(-)
  28
  29 --- a/drivers/gpu/drm/radeon/evergreen.c
  30 +++ b/drivers/gpu/drm/radeon/evergreen.c
  31 @@ -2178,9 +2178,9 @@ static void evergreen_gpu_init(struct ra
  32                 WREG32(CC_SYS_RB_BACKEND_DISABLE, rb);
  33                 WREG32(GC_USER_RB_BACKEND_DISABLE, rb);
  34                 WREG32(CC_GC_SHADER_PIPE_CONFIG, sp);
  35 -        }
  36 +       }
  37
  38 -       grbm_gfx_index |= SE_BROADCAST_WRITES;
  39 +       grbm_gfx_index = INSTANCE_BROADCAST_WRITES | SE_BROADCAST_WRITES;
  40         WREG32(GRBM_GFX_INDEX, grbm_gfx_index);
  41         WREG32(RLC_GFX_INDEX, grbm_gfx_index);
  42