drm/amd/display: Check link_active instead of lane_settings != unknown

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[Why]
enable_link_dp_mst checks that cur_link_settings != unknown to determine
that the link is already enabled, to skip redundant enablement calls for
multiple streams on the same link. During dc_reinitialize_hardware,
cur_link_settings on previously-active links is not cleared, which blocks
MST links from being re-enabled after a reinitialization.

[How]
 - check for link_status->link_active instead, as it's the real intent
 - clear cur_link_settings when we clear link_active

Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Joshua Aberback 2020-11-17 11:27:33 -05:00 • committed by Alex Deucher

parent 901c1ec05e

commit 079204508e

2 changed files with 3 additions and 1 deletions

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2

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

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2

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

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