drm/amd/display: Fix two MST not light up regressions

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1. Change 100104: Move verify link cap after read edid causes MST
   link_cap struct not being set. It leads to zero denominator
   pbn_per_slot value, leading to the crash at
   dal_fixed31_32_div(). Skip MST link training for now and will
   need to add MST specific link traning routine later.

2. Change 98822: Adding edp supports changes link setting
   condition from max_link to verified_link. It leads to MST is
   getting wrong link settings.
   e.g. LINK_SPREAD_05_DOWNSPREAD_30KHZ not set in MST case

Signed-off-by: Jerry Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jerry Zuo 2017-08-17 16:05:37 -04:00 • committed by Alex Deucher

parent dff2721bd1

commit 3f1f74f436

2 changed files with 17 additions and 7 deletions

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16

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

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8

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

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