Add a new drm_connector_oob_hotplug_event() function and oob_hotplug_event drm_connector_funcs member.
On some hardware a hotplug event notification may come from outside the display driver / device. An example of this is some USB Type-C setups where the hardware muxes the DisplayPort data and aux-lines but does not pass the altmode HPD status bit to the GPU's DP HPD pin.
In cases like this the new drm_connector_oob_hotplug_event() function can be used to report these out-of-band events after obtaining a drm_connector reference through calling drm_connector_find_by_fwnode().
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/gpu/drm/drm_connector.c | 20 ++++++++++++++++++++ include/drm/drm_connector.h | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 87c68563e6c3..7d3adc41c11a 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2676,6 +2676,26 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, return ret; }
+/** + * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector + * @connector: connector to report the event on + * @data: data related to the event + * + * On some hardware a hotplug event notification may come from outside the display + * driver / device. An example of this is some USB Type-C setups where the hardware + * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD + * status bit to the GPU's DP HPD pin. + * + * This function can be used to report these out-of-band events after obtaining + * a drm_connector reference through calling drm_connector_find_by_fwnode(). + */ +void drm_connector_oob_hotplug_event(struct drm_connector *connector, + struct drm_connector_oob_hotplug_event_data *data) +{ + if (connector->funcs->oob_hotplug_event) + connector->funcs->oob_hotplug_event(connector, data); +} +EXPORT_SYMBOL(drm_connector_oob_hotplug_event);
/** * DOC: Tile group diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 1e5d154d1f4a..6a10f8890809 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -27,6 +27,7 @@ #include <linux/llist.h> #include <linux/ctype.h> #include <linux/hdmi.h> +#include <linux/usb/typec.h> /* For enum typec_orientation */ #include <drm/drm_mode_object.h> #include <drm/drm_util.h>
@@ -649,6 +650,27 @@ struct drm_connector_tv_margins { unsigned int top; };
+/** + * struct drm_connector_oob_hotplug_event_data: OOB hotplug event data + * + * Contains data about out-of-band hotplug events, signalled through + * drm_connector_oob_hotplug_event(). + */ +struct drm_connector_oob_hotplug_event_data { + /** + * @connected: New connected status for the connector. + */ + bool connected; + /** + * @dp_lanes: Number of available displayport lanes, 0 if unknown. + */ + int dp_lanes; + /** + * @orientation: Connector orientation. + */ + enum typec_orientation orientation; +}; + /** * struct drm_tv_connector_state - TV connector related states * @subconnector: selected subconnector @@ -1110,6 +1132,15 @@ struct drm_connector_funcs { */ void (*atomic_print_state)(struct drm_printer *p, const struct drm_connector_state *state); + + /** + * @oob_hotplug_event: + * + * This will get called when a hotplug-event for a drm-connector + * has been received from a source outside the display driver / device. + */ + void (*oob_hotplug_event)(struct drm_connector *connector, + struct drm_connector_oob_hotplug_event_data *data); };
/** @@ -1697,6 +1728,8 @@ drm_connector_is_unregistered(struct drm_connector *connector) }
struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode); +void drm_connector_oob_hotplug_event(struct drm_connector *connector, + struct drm_connector_oob_hotplug_event_data *data); const char *drm_get_connector_type_name(unsigned int connector_type); const char *drm_get_connector_status_name(enum drm_connector_status status); const char *drm_get_subpixel_order_name(enum subpixel_order order);