drm/amd/display: Retry link training again

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[Why]
Some receivers seem to fail the first link training but are good on
subsequent tries. We want to retry link training again. This fixes
HTC vive pro not lighting up after being disabled.

[How]
Check if the link training passed without fall back if this is not
the case then we retry link training.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Bhawanpreet Lakha 2018-07-13 18:00:06 -04:00 • committed by Alex Deucher

parent 66c28d6df2

commit 824474ba38

3 changed files with 24 additions and 4 deletions

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20

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

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5

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

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3

drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h

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