From: Samson Tam <Samson.Tam@xxxxxxx> [ Upstream commit efbde23a3b0164cef27fd394e7d548f46af5b51d ] [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@xxxxxxx> Reviewed-by: Joshua Aberback <Joshua.Aberback@xxxxxxx> Acked-by: Eryk Brol <eryk.brol@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index bdddb46727b1f..885beb0bcc199 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -767,6 +767,7 @@ 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; -- 2.25.1
