drm/amd/display: Only update link settings after successful MST link train

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[WHY]
Currently driver reduces verified link caps on DPIA devices if a link is
trained at a link rate below the max rate verified during link detection.
This blocks high bandwidth modes after setting a low bandwidth mode.

[HOW]
Only update link rate after a successful link train if link is MST.

Reviewed-by: Mustapha Ghaddar <Mustapha.Ghaddar@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@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>

...

This commit is contained in:

Michael Strauss 2022-10-20 15:57:36 -04:00 • committed by Alex Deucher

parent 1df6b9b07e

commit ea192af507

4 changed files with 22 additions and 2 deletions

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8

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

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4

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

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7

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

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5

drivers/gpu/drm/amd/display/dc/dm_helpers.h

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