drm/amd/display: Add hpd pending flag to indicate detection of new hpd

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[Why]
For dpia link, link->hpd_status indicates current state, but driver
fails to capture hpd transitions in certain scenarios such as during
link training.

[How]
Added link->hpd_pending flag that captures arrival of new hpd.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Meenakshikumar Somasundaram 2021-11-04 16:52:09 -04:00 • committed by Alex Deucher

parent 095041dbfa

commit 6ef86fa8cc

3 changed files with 14 additions and 13 deletions

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6

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

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20

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

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1

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

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