drm/amd/display: Fix soft hang issue when some DPCD data invalid

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[Why]
AUX transaction returns success, but data has invalid lane count and rate
which when passed to VBIOS command table causes it to soft hang

[How]
Do some sanity checking and fail if the DPCD caps are invalid.

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Anthony Koo 2019-02-15 14:19:30 -05:00 • committed by Alex Deucher

parent 09e5665ada

commit 07d6a19921

1 changed files with 9 additions and 0 deletions

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

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