diff options
| author | Pixel Ding <Pixel.Ding@amd.com> | 2017-12-11 16:48:33 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-12-12 14:45:47 -0500 |
| commit | 2ffe31deb27579e2f2c9444e01f4d8abf385d145 (patch) | |
| tree | 30b712dbe3053fd00219ad99a36eceb2d2b5d5da /drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | |
| parent | b852f3d3fb5d770f54c10614e6320a29943eb52f (diff) | |
drm/amdgpu: use polling mem to set SDMA3 wptr for VF
On Tonga VF, there're 2 sources updating wptr registers for
sdma3: 1) polling mem and 2) doorbell. When doorbell and polling
mem are both enabled on sdma3, there will be collision hit in
occasion between those two sources when ucode and h/w are doing
the updating on wptr register in parallel. Issue doesn't happen
on CP GFX/Compute since CP drops all doorbell writes when VF is
inactive. So enable polling mem and don't use doorbell for SDMA3.
Signed-off-by: Pixel Ding <Pixel.Ding@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index 641e3fd7ba3c..010f69084af5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -186,6 +186,7 @@ struct amdgpu_ring { uint64_t eop_gpu_addr; u32 doorbell_index; bool use_doorbell; + bool use_pollmem; unsigned wptr_offs; unsigned fence_offs; uint64_t current_ctx; |