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| author |   Sonny Jiang <sonny.jiang@amd.com> | 2023-03-28 13:19:11 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2023-06-09 09:56:26 -0400 |
| commit | 96e693ad78a0778efb5256684a2f3712298f3e18 (patch) | |
| tree | 2746a664fdd98ae7563153fd7bf49e03cc2a7a98 | |
| parent | drm/amdgpu: fixes a JPEG get write/read pointer bug (diff) | |
| download | wireguard-linux-96e693ad78a0778efb5256684a2f3712298f3e18.tar.xz wireguard-linux-96e693ad78a0778efb5256684a2f3712298f3e18.zip | |
drm/amdgpu: Add a read after write DB_CTRL for vcn_v4_0_3
To make sure VCN DB_CTRL is delivered before doorbell write.
Signed-off-by: Sonny Jiang <sonny.jiang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c index b0e28d611f2d..9d0c3dc76547 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0_3.c @@ -195,6 +195,11 @@ static int vcn_v4_0_3_hw_init(void *handle) ring->doorbell_index << VCN_RB1_DB_CTRL__OFFSET__SHIFT | VCN_RB1_DB_CTRL__EN_MASK); + + /* Read DB_CTRL to flush the write DB_CTRL command. */ + RREG32_SOC15( + VCN, GET_INST(VCN, ring->me), + regVCN_RB1_DB_CTRL); } r = amdgpu_ring_test_helper(ring); |