Commit 24bce22d authored by Dmitry Baryshkov's avatar Dmitry Baryshkov Committed by Greg Kroah-Hartman
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usb: typec: ucsi: add callback for connector status updates 



Allow UCSI glue driver to perform addtional work to update connector
status. For example, it might check the cable orientation.  This call is
performed after reading new connector statatus, so the platform driver
can peek at new connection status bits.

The callback is called both when registering the port and when the
connector change event is being handled.

Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240411-ucsi-orient-aware-v2-1-d4b1cb22a33f@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0a723ed3

drivers/usb/typec/ucsi/ucsi.c

+6 −0
Original line number Diff line number Diff line
@@ -1199,6 +1199,9 @@ static void ucsi_handle_connector_change(struct work_struct *work) 


	trace_ucsi_connector_change(con->num, &con->status);



	if (ucsi->ops->connector_status)

		ucsi->ops->connector_status(con);



	role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);



	if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
@@ -1590,6 +1593,9 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con) 
	}

	ret = 0; /* ucsi_send_command() returns length on success */



	if (ucsi->ops->connector_status)

		ucsi->ops->connector_status(con);



	switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {

	case UCSI_CONSTAT_PARTNER_TYPE_UFP:

	case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:

drivers/usb/typec/ucsi/ucsi.h

+3 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 


struct ucsi;

struct ucsi_altmode;

struct ucsi_connector;

struct dentry;



/* UCSI offsets (Bytes) */
@@ -59,6 +60,7 @@ struct dentry; 
 * @sync_write: Blocking write operation

 * @async_write: Non-blocking write operation

 * @update_altmodes: Squashes duplicate DP altmodes

 * @connector_status: Updates connector status, called holding connector lock

 *

 * Read and write routines for UCSI interface. @sync_write must wait for the

 * Command Completion Event from the PPM before returning, and @async_write must
@@ -73,6 +75,7 @@ struct ucsi_operations { 
			   const void *val, size_t val_len);

	bool (*update_altmodes)(struct ucsi *ucsi, struct ucsi_altmode *orig,

				struct ucsi_altmode *updated);

	void (*connector_status)(struct ucsi_connector *con);

};



struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops);