drm/amd/display: Fix system hang at boot

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[Why]
During DQE's promotion test, system hang issue is found on linux
system;

[How]
1. Add NULL pointor check for the link in the sequence trace
   function;
2. Get the right link for the stream encoder before blank DP
   stream;

Acked-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Leo (Hanghong) Ma 2021-08-16 14:35:59 -04:00 • committed by Alex Deucher

parent 3550d6225b

commit 952ab0b302

2 changed files with 18 additions and 11 deletions

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2

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

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27

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

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