From: Gareth Yu <gareth.yu@xxxxxxxxx> Re-train the main link once HPD happens without link status Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10902 Cc : Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@xxxxxxxxx> Cc : Matt Roper <matthew.d.roper@xxxxxxxxx> Cc : Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Signed-off-by: Gareth Yu <gareth.yu@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_dp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index e05e25cd4a94..52ab549e6d08 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -5849,8 +5849,13 @@ intel_dp_detect(struct drm_connector *connector, /* Can't disconnect eDP */ if (intel_dp_is_edp(intel_dp)) status = edp_detect(intel_dp); - else if (intel_digital_port_connected(encoder)) + else if (intel_digital_port_connected(encoder)) { status = intel_dp_detect_dpcd(intel_dp); + if (status == connector_status_connected && intel_dp->is_mst && + !intel_dp_mst_link_status(intel_dp)) + if (intel_dp_retrain_link(encoder, ctx)) + status = connector_status_disconnected; + } else status = connector_status_disconnected; -- 2.25.1
