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drm/amd/display: Fix passive dongle mistaken as active dongle in EDID emulation

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[Why]
dongle_type is set during dongle connection but for passive dongles,
dongle_type is not set. If user starts with an active dongle and
then switches to a passive dongle, it will still report as an active
dongle. Trying to emulate the wrong connecter type results in display
not lighting up.

[How]
Set dpcd_caps.dongle_type for passive dongles in detect_dp().

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Joshua Aberback <Joshua.Aberback@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Samson Tam 2020-08-13 10:50:21 -04:00 committed by Alex Deucher
parent b61f05622a
commit efbde23a3b
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/core/dc_link.c
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@ -763,6 +763,7 @@ static bool detect_dp(struct dc_link *link,
sink_caps->signal = dp_passive_dongle_detection(link->ddc,
sink_caps,
audio_support);
link->dpcd_caps.dongle_type = sink_caps->dongle_type;
}
return true;