drm/radeon/kms: Fix chremap setup on RV770 CE

CE variant requires a different chremap setup.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=35472

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 6f508ffd1035..8bb347d23ca6 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -575,6 +575,12 @@ static void rv770_program_channel_remap(struct radeon_device *rdev)
         else
                 tcp_chan_steer = 0x00fac688;
 
+        /* RV770 CE has special chremap setup */
+        if (rdev->pdev->device == 0x944e) {
+                tcp_chan_steer = 0x00b08b08;
+                mc_shared_chremap = 0x00b08b08;
+        }
+
         WREG32(TCP_CHAN_STEER, tcp_chan_steer);
         WREG32(MC_SHARED_CHREMAP, mc_shared_chremap);
 }