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| author | Evan Quan <evan.quan@amd.com> | 2021-05-25 14:36:29 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-06-30 00:18:14 -0400 |
| commit | adcf949e664a8b04df2fb8aa916892e58561653c (patch) | |
| tree | 33f040226fc98b168c33a42f751f14baf1d371c1 /drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h | |
| parent | 5a5da8ae9546031e43efd4fa5aa8baa481e83dfb (diff) | |
| download | linux-adcf949e664a8b04df2fb8aa916892e58561653c.tar.gz linux-adcf949e664a8b04df2fb8aa916892e58561653c.tar.bz2 linux-adcf949e664a8b04df2fb8aa916892e58561653c.zip | |
drm/amdgpu: fix the hang caused by PCIe link width switch
SMU had set all the necessary fields for a link width switch
but the width switch wasn't occurring because the link was idle
in the L1 state. Setting LC_L1_RECONFIG_EN=0x1 will allow width
switches to also be initiated while in L1 instead of waiting until
the link is back in L0.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h index 43d074bb00a1..45295dce5c3e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h @@ -94,6 +94,7 @@ struct amdgpu_nbio_funcs { bool enable); void (*program_aspm)(struct amdgpu_device *adev); void (*apply_lc_spc_mode_wa)(struct amdgpu_device *adev); + void (*apply_l1_link_width_reconfig_wa)(struct amdgpu_device *adev); }; struct amdgpu_nbio { |