diff options
| author | Evan Quan <evan.quan@amd.com> | 2021-05-25 12:08:53 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-19 10:04:48 +0200 |
| commit | 0d3a1e59fd9d13d0d0ad586fb7abf3df20ba417c (patch) | |
| tree | a9a55669406b2bafb70acaf5eba837a151900996 /drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h | |
| parent | 5af51c7bc675637da0e934d1aefda89a5f8503db (diff) | |
drm/amdgpu: fix NAK-G generation during PCI-e link width switch
commit 5a5da8ae9546031e43efd4fa5aa8baa481e83dfb upstream.
A lot of NAK-G being generated when link widht switching is happening.
WA for this issue is to program the SPC to 4 symbols per clock during
bootup when the native PCIE width is x4.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 25ee53545837d..43d074bb00a11 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h @@ -93,6 +93,7 @@ struct amdgpu_nbio_funcs { void (*enable_aspm)(struct amdgpu_device *adev, bool enable); void (*program_aspm)(struct amdgpu_device *adev); + void (*apply_lc_spc_mode_wa)(struct amdgpu_device *adev); }; struct amdgpu_nbio { |