drm/amd/display: fix link training regression for 1 or 2 lane

Browse source

[why]
We have a regression that cause maximize lane settings to use
uninitialized data from unused lanes.
This will cause link training to fail for 1 or 2 lanes because the lane
adjust is populated incorrectly sometimes.

v2: fix build without CONFIG_DRM_AMD_DC_DCN (Alex)

Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Wenjing Liu 2021-09-27 13:10:07 -04:00 • committed by Alex Deucher

parent 9c92c79b05

commit e72aa36ef8

1 changed files with 32 additions and 3 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

35

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

View file