drm/amdgpu: disable HDP flushes on APUs

We completely bypass the HDP now.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index e02a70dd37b5..e357e42c10c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -172,7 +172,11 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
                 }
         }
 
-        if (ring->funcs->emit_hdp_flush)
+        if (ring->funcs->emit_hdp_flush
+#ifdef CONFIG_X86_64
+            && !(adev->flags & AMD_IS_APU)
+#endif
+           )
                 amdgpu_ring_emit_hdp_flush(ring);
 
         skip_preamble = ring->current_ctx == fence_ctx;
@@ -202,7 +206,11 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
                 need_ctx_switch = false;
         }
 
-        if (ring->funcs->emit_hdp_invalidate)
+        if (ring->funcs->emit_hdp_invalidate
+#ifdef CONFIG_X86_64
+            && !(adev->flags & AMD_IS_APU)
+#endif
+           )
                 amdgpu_ring_emit_hdp_invalidate(ring);
 
         r = amdgpu_fence_emit(ring, f);