drm/amd/display: Increase AUX Intra-Hop Done Max Wait Duration

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[ Upstream commit e3419e1e44 ]

[WHY]
In the worst case, AUX intra-hop done can take hundreds of milliseconds as
each retimer in a link might have to wait a full AUX_RD_INTERVAL to send
LT abort downstream.

[HOW]
Wait 300ms for each retimer in a link to allow time to propagate a LT abort
without infinitely waiting on intra-hop done.
For no-retimer case, keep the max duration at 10ms.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Michael Strauss 2025-03-19 18:04:01 -04:00 • committed by Greg Kroah-Hartman

parent 021fe59351

commit ec77576783

1 changed files with 7 additions and 2 deletions

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

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