drm/amdgpu: fix NAK-G generation during PCI-e link width switch

Browse source

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

...

This commit is contained in:

Evan Quan 2021-05-25 12:08:53 +08:00 • committed by Alex Deucher

parent 9c26ddb1c5

commit 5a5da8ae95

3 changed files with 32 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.h

View file

28

drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c

View file

3

drivers/gpu/drm/amd/amdgpu/nv.c

View file