drm/amd/display: allow set dp drive setting when stream is not present

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[why]
There is a change previously to disallow DM to set dp drive setings when
stream is not present. The logic might not work well with DP PHY
complaince scenario with a PHY test fixture attachment. We need to make
the method allow DP link drive settings changes even without stream
attached to it.

[how]
revert back to previous code in set drive setting function then add an
empty link_resource structure, then assign link resource based on
current link resource if link resource is allocated to the current pipe.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Wenjing Liu 2022-01-23 13:20:17 -05:00 • committed by Alex Deucher

parent d063e70c6a

commit f6a3795d35

2 changed files with 15 additions and 18 deletions

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30

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

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3

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

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