From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Add DisplayPort CEC-Tunneling-over-AUX support to amdgpu.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 +++++++++++--
.../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 ++
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 34f34823bab5..77898c95bef6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -898,6 +898,7 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
aconnector->dc_sink = sink;
if (sink->dc_edid.length == 0) {
aconnector->edid = NULL;
+ drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
} else {
aconnector->edid =
(struct edid *) sink->dc_edid.raw_edid;
@@ -905,10 +906,13 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
drm_connector_update_edid_property(connector,
aconnector->edid);
+ drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
+ aconnector->edid);
}
amdgpu_dm_add_sink_to_freesync_module(connector, aconnector->edid);
} else {
+ drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
amdgpu_dm_remove_sink_from_freesync_module(connector);
drm_connector_update_edid_property(connector, NULL);
aconnector->num_modes = 0;
@@ -1059,12 +1063,16 @@ static void handle_hpd_rx_irq(void *param)
drm_kms_helper_hotplug_event(dev);
}
}
+
if ((dc_link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) ||
- (dc_link->type == dc_connection_mst_branch))
+ (dc_link->type == dc_connection_mst_branch)) {
dm_handle_hpd_rx_irq(aconnector);
+ }
- if (dc_link->type != dc_connection_mst_branch)
+ if (dc_link->type != dc_connection_mst_branch) {
+ drm_dp_cec_irq(&aconnector->dm_dp_aux.aux);
mutex_unlock(&aconnector->hpd_lock);
+ }
}
static void register_hpd_handlers(struct amdgpu_device *adev)
@@ -2732,6 +2740,7 @@ static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
dm->backlight_dev = NULL;
}
#endif
+ drm_dp_cec_unregister_connector(&aconnector->dm_dp_aux.aux);
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
kfree(connector);
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 9a300732ba37..18a3a6e5ffa0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -496,6 +496,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
+ drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
+ aconnector->base.name, dm->adev->dev);
aconnector->mst_mgr.cbs = &dm_mst_cbs;
drm_dp_mst_topology_mgr_init(
&aconnector->mst_mgr,
--
2.18.0
