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Commit 0bbd1c7d authored by George Shen's avatar George Shen Committed by Alex Deucher
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drm/amd/display: Handle downstream LTTPR with fixed VS sequence



[Why]
Several issues were discovered that caused link
training to fail when an LTTPR device is
connected downstream for the fixed VS sequence.

[How]
The following were added:
- workaround to configure AUX timeout
for fixed VS sequence
- additional delay before disabling
fixed VS intercept
- detection of fixed VS deadlock state and
performing DPCD sequence to recover

Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: default avatarMeenakshikumar Somasundaram <Meenakshikumar.Somasundaram@amd.com>
Acked-by: default avatarAlan Liu <HaoPing.Liu@amd.com>
Signed-off-by: default avatarGeorge Shen <George.Shen@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent a3e73126
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