On Mon, Jun 29, 2026 at 10:48:07PM +0800, Yongxing Mou wrote: > When MST becomes active, the initial HPD plug notification updates the > SST connector state to connected. > > However, the subsequent SST connector detect path reports disconnected > while MST is enabled. This connected -> disconnected transition is then > observed by the polling logic and may result in an unnecessary hotplug > event. > > Set the SST connector state to disconnected immediately after MST is > initialized so that the detect path does not introduce a transient > state change. > > Signed-off-by: Yongxing Mou <[email protected]> > --- > drivers/gpu/drm/msm/dp/dp_display.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c > b/drivers/gpu/drm/msm/dp/dp_display.c > index 4ee391cc7165..f8ca60d6d714 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -352,8 +352,10 @@ static int msm_dp_display_process_hpd_high(struct > msm_dp_display_private *dp) > if (dp->max_stream > 1 && drm_dp_read_mst_cap(dp->aux, dp->panel->dpcd)) > msm_dp_display_mst_init(dp); > > - if (dp->msm_dp_display.mst_active) > + if (dp->msm_dp_display.mst_active) { > + connector->status = connector_status_disconnected; > msm_dp_mst_display_set_mgr_state(&dp->msm_dp_display, true);
This should be a part of the MST series. > + } > > msm_dp_link_reset_phy_params_vx_px(dp->link); > > > -- > 2.43.0 > -- With best wishes Dmitry
