On 2018-08-17 10:11 AM, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> Add DisplayPort CEC-Tunneling-over-AUX support to amdgpu.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> Acked-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> 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);
> + }
These lines don't really add anything functional.
Either way, this patch is
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Harry
>
> - 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,
>
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