i915/display/dp: send a more fine-grained link-status uevent

When link-status changes, send a hotplug uevent which contains the
connector ID. That way, user-space can more easily figure out that
only this connector has been updated.

Changes in v4: avoid sending two uevents (Ville)

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211018084707.32253-7-contact@emersion.fr

drivers/gpu/drm/i915/display/intel_dp.c

@@ -4947,7 +4947,7 @@ static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
 					       DRM_MODE_LINK_STATUS_BAD);
 	mutex_unlock(&connector->dev->mode_config.mutex);
 	/* Send Hotplug uevent so userspace can reprobe */
-	drm_kms_helper_hotplug_event(connector->dev);
+	drm_kms_helper_connector_hotplug_event(connector);
 }
 
 bool