drm/amd/display: Add delay after h' watchdog timeout event

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[WHY]
Some monitors trigger HDCP2.x timeout after reinitializing (e.g. toggling HDR)
by taking longer than expected to return h' (h prime)
Previously the 200ms watchdog timer retry count would hit
MAX_NUM_OF_ATTEMPTS (4), causing fallback to HDCP1.x

[HOW]
Adding a 1s delay after an h' watchdog timeout provides enough time
for affected monitors to return h' in time without hitting MAX_NUM_OF_ATTEMPTS

Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Michael Strauss 2019-09-23 08:47:47 -04:00 • committed by Alex Deucher

parent 454425e8f9

commit daa9692db9

1 changed files with 4 additions and 4 deletions

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drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c

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