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drm/amd/display: reset dpcd_cap.dpcd_rev for passive dongle.

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[why]
currently dc has never reset this dpcd_cap.dpcd_rev.

[how]
ideally  we should reset this before redo detection.
change the passive dongle only for now to reduce the impact.

Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2021-06-22 21:32:53 -04:00 committed by Alex Deucher
parent ad43a647bc
commit 1e9653a41a
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/core/dc_link.c
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@ -541,6 +541,7 @@ static void link_disconnect_sink(struct dc_link *link)
}
link->dpcd_sink_count = 0;
//link->dpcd_caps.dpcd_rev.raw = 0;
}
static void link_disconnect_remap(struct dc_sink *prev_sink, struct dc_link *link)
@ -742,6 +743,7 @@ static bool detect_dp(struct dc_link *link,
sink_caps,
audio_support);
link->dpcd_caps.dongle_type = sink_caps->dongle_type;
link->dpcd_caps.dpcd_rev.raw = 0;
}
return true;