drm/amd/display: Add fallback defaults for invalid LTTPR DPCD caps

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[WHY]
Some sinks are observed to return invalid LTTPR revision and/or invalid
LTTPR link rate capabilities.

[HOW]
Assume any LTTPR which reports invalid max link rate supports HBR3.
Don't validate LTTPR DPCD revision in dp_is_lttpr_present check.

Reviewed-by: George Shen <george.shen@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Michael Strauss 2024-05-21 14:52:37 -04:00 • committed by Alex Deucher

parent 396477d950

commit 82c421ba46

1 changed files with 16 additions and 3 deletions

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

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