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| author | Tiecheng Zhou <Tiecheng.Zhou@amd.com> | 2020-01-08 08:44:29 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-14 18:18:09 +0300 |
| commit | df5e984c8bd414561c320d6cbbb66d53abf4c7e2 (patch) | |
| tree | 4f6ca4cd4e85cef15cc87ee57a987b4ab7fae194 /drivers/gpu/drm/amd/amdgpu/nv.c | |
| parent | 2d5ef0b42c0bca33aaaff2f1b98855e4e3225a0f (diff) | |
| download | linux-df5e984c8bd414561c320d6cbbb66d53abf4c7e2.tar.xz | |
drm/amdgpu/sriov: workaround on rev_id for Navi12 under sriov
guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0,
as a consequence, the rev_id and external_rev_id are wrong.
workaround it by hardcoding the rev_id to 0, which is the default value.
v2. add comment in the code
Signed-off-by: Tiecheng Zhou <Tiecheng.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/nv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/nv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c index 42ede3aa6dbd..2e0f8933410e 100644 --- a/drivers/gpu/drm/amd/amdgpu/nv.c +++ b/drivers/gpu/drm/amd/amdgpu/nv.c @@ -726,6 +726,12 @@ static int nv_common_early_init(void *handle) AMD_PG_SUPPORT_VCN_DPG | AMD_PG_SUPPORT_JPEG | AMD_PG_SUPPORT_ATHUB; + /* guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0, + * as a consequence, the rev_id and external_rev_id are wrong. + * workaround it by hardcoding rev_id to 0 (default value). + */ + if (amdgpu_sriov_vf(adev)) + adev->rev_id = 0; adev->external_rev_id = adev->rev_id + 0xa; break; default: |