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/nv.c | |
| 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/nv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/nv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c index d290ca0b06da8..761df6fd238ff 100644 --- a/drivers/gpu/drm/amd/amdgpu/nv.c +++ b/drivers/gpu/drm/amd/amdgpu/nv.c @@ -1194,6 +1194,9 @@ static int nv_common_hw_init(void *handle) { struct amdgpu_device *adev = (struct amdgpu_device *)handle; + if (adev->nbio.funcs->apply_lc_spc_mode_wa) + adev->nbio.funcs->apply_lc_spc_mode_wa(adev); + /* enable pcie gen2/3 link */ nv_pcie_gen3_enable(adev); /* enable aspm */ |