drm/amd/display: refine to decide the verified link setting

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[WHY]
We return false by default when link training fail at link loss.
It will cause we get a fail verified link caps directly.

[HOW]
Record the highest verified link caps. Use the recorded value as
the verified link caps if it is not successful in the last attempt
to avoid to use the lowest link setting.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Alan Liu <haoping.liu@amd.com>
Signed-off-by: Zhikai Zhai <zhikai.zhai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Zhikai Zhai 2023-06-30 13:56:04 +08:00 • committed by Alex Deucher

parent 3a87e25aaa

commit c99fcb02bc

1 changed files with 12 additions and 5 deletions

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drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c

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