drm/amd/display: Update link training fallback behaviour.

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[Why]
Some displays may need several link training attempts before
link training succeeds.

[How]
If training succeeds after falling back to lower link bandwidth,
retry at original link bandwidth instead of abandoning link training
whenever link bandwidth is less than stream bandwidth.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Jimmy Kizito 2022-04-14 09:49:37 -04:00 • committed by Alex Deucher

parent c4955d9cd2

commit d84c4d194e

1 changed files with 53 additions and 24 deletions

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

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