Hotplugging a monitor in DP MST configuration triggers short pulses. Although the short pulse handling path ends up in the MST hotplug function, we do not perform a detect before sending the hotplug uvent. This leads to the connector status not being updated when the userspace calls DRM_IOCTL_MODE_GETCONNECTOR. So, let's call the connector function ->detect() to update the connector status before sending the uevent. Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp_mst.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index 3ffbd69..a28b12b 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -492,8 +492,25 @@ static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = intel_dig_port->base.base.dev; + struct intel_connector *intel_connector; + bool change = false; + enum drm_connector_status old_status; + + for_each_intel_connector(dev, intel_connector) { + struct drm_connector *connector = &(intel_connector->base); + + if (intel_connector->mst_port != intel_dp) + continue; + + old_status = connector->status; + connector->status = connector->funcs->detect(connector, false); + + if (old_status != connector->status) + changed = true; + } - drm_kms_helper_hotplug_event(dev); + if (changed) + drm_kms_helper_hotplug_event(dev); } static const struct drm_dp_mst_topology_cbs mst_cbs = { -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx