On Mon, Aug 17, 2026 at 04:01:34PM +0800, Yongxing Mou wrote: > > > On 7/12/2026 6:56 PM, Dmitry Baryshkov wrote: > > 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. > > > Got it .
Also, you need to take the lock to modify the status field. > > > + } > > > msm_dp_link_reset_phy_params_vx_px(dp->link); > > > > > > -- > > > 2.43.0 > > > > > > -- With best wishes Dmitry
