On Thu, Jun 15, 2017 at 09:38:10AM +0800, Ethan Hsieh wrote: > We receive hotplug event, but do not handle it. Set value of fake mst > encoder's hpd pin to handle hotplug event.
We're not supposed to handle it like that. The HPD is for the main encoder, the MST hotplug handling comes via the topology manager. > > Before applying the patch: > [ 36.595058] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat > 0x00200000, dig 0x10101012, pins 0x00000020 > [ 36.595172] [drm:i915_hotplug_work_func [i915]] running encoder hotplug > functions > > After applying the patch: > [ 29.807410] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat > 0x00200000, dig 0x10101012, pins 0x00000020 > [ 29.807524] [drm:i915_hotplug_work_func [i915]] running encoder hotplug > functions > [ 30.086098] [drm:i915_hotplug_work_func [i915]] Connector DP-4 (pin 5) > received hotplug event. > [ 30.086123] [drm:i915_hotplug_work_func [i915]] [CONNECTOR:74:DP-4] status > updated from connected to disconnected > [ 30.086181] [drm:intel_dp_destroy_mst_connector [i915]] > [ 30.087752] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] > [CONNECTOR:74:DP-4] disconnected > [ 30.091979] [drm:drm_mode_setcrtc [drm]] [CRTC:39:pipe B] > > Signed-off-by: Ethan Hsieh <[email protected]> > --- > drivers/gpu/drm/i915/intel_dp_mst.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c > b/drivers/gpu/drm/i915/intel_dp_mst.c > index 3715386..2ef9f18 100644 > --- a/drivers/gpu/drm/i915/intel_dp_mst.c > +++ b/drivers/gpu/drm/i915/intel_dp_mst.c > @@ -563,6 +563,7 @@ intel_dp_create_fake_mst_encoder(struct > intel_digital_port *intel_dig_port, enum > intel_encoder->type = INTEL_OUTPUT_DP_MST; > intel_encoder->power_domain = intel_dig_port->base.power_domain; > intel_encoder->port = intel_dig_port->port; > + intel_encoder->hpd_pin = intel_dig_port->base.hpd_pin; > intel_encoder->crtc_mask = 0x7; > intel_encoder->cloneable = 0; > > -- > 2.7.4 > > _______________________________________________ > Intel-gfx mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Ville Syrjälä Intel OTC _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
