Quoting Kuogee Hsieh (2022-08-10 12:25:51) > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c > index b36f8b6..678289a 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -1729,10 +1729,20 @@ void dp_bridge_disable(struct drm_bridge *drm_bridge) > struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge); > struct msm_dp *dp = dp_bridge->dp_display; > struct dp_display_private *dp_display; > + u32 state; > > dp_display = container_of(dp, struct dp_display_private, dp_display); > > + mutex_lock(&dp_display->event_mutex); > + > + state = dp_display->hpd_state; > + if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) { It's concerning that we have to check this at all. Are we still interjecting into the disable path when the cable is disconnected? > + mutex_unlock(&dp_display->event_mutex); > + return; > + } > + > dp_ctrl_push_idle(dp_display->ctrl); > + mutex_unlock(&dp_display->event_mutex);