drm/amd/display: Fixed Clock Recovery Sequence

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[Why]
When performing clock recovery, if a pre-emphasis adjustment is
requested, but voltage swing remains constant, the the retry counter
will not be reset. This can lead to prematurely failing link training.

[How]
Reset the clock recovery retry counter if an adjustment is requested
for either voltage swing or pre-emphasis.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Calvin Hou <Calvin.Hou@amd.com>
Signed-off-by: David Galiffi <David.Galiffi@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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David Galiffi 2021-03-11 18:13:12 -05:00 • committed by Alex Deucher

parent 4aa8607e25

commit 3d223c5528

1 changed files with 6 additions and 4 deletions

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

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