Commit ed4a5c5d authored by RD Babiera's avatar RD Babiera Committed by Greg Kroah-Hartman
Browse files

usb: typec: class: add typec_get_data_role symbol 



Alt Mode drivers are responsible for sending Enter Mode through the TCPM,
but only a DFP is allowed to send Enter Mode. typec_get_data_role gets
the port's data role, which can then be used in altmode drivers via
typec_altmode_get_data_role to know if Enter Mode should be sent.

Signed-off-by: default avatarRD Babiera <rdbabiera@google.com>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250923181606.1583584-5-rdbabiera@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 924aa1d9

drivers/usb/typec/class.c

+13 −0
Original line number Diff line number Diff line
@@ -2120,6 +2120,19 @@ void typec_set_data_role(struct typec_port *port, enum typec_data_role role) 
}

EXPORT_SYMBOL_GPL(typec_set_data_role);



/**

 * typec_get_data_role - Get port data role

 * @port: The USB Type-C Port to query

 *

 * This routine is used by the altmode drivers to determine if the port is the

 * DFP before issuing Enter Mode

 */

enum typec_data_role typec_get_data_role(struct typec_port *port)

{

	return port->data_role;

}

EXPORT_SYMBOL_GPL(typec_get_data_role);



/**

 * typec_set_pwr_role - Report power role change

 * @port: The USB Type-C Port where the role was changed

include/linux/usb/typec.h

+1 −0
Original line number Diff line number Diff line
@@ -337,6 +337,7 @@ struct typec_plug *typec_register_plug(struct typec_cable *cable, 
void typec_unregister_plug(struct typec_plug *plug);



void typec_set_data_role(struct typec_port *port, enum typec_data_role role);

enum typec_data_role typec_get_data_role(struct typec_port *port);

void typec_set_pwr_role(struct typec_port *port, enum typec_role role);

void typec_set_vconn_role(struct typec_port *port, enum typec_role role);

void typec_set_pwr_opmode(struct typec_port *port, enum typec_pwr_opmode mode);

include/linux/usb/typec_altmode.h

+13 −0
Original line number Diff line number Diff line
@@ -172,6 +172,19 @@ typec_altmode_get_svdm_version(struct typec_altmode *altmode) 
	return typec_get_negotiated_svdm_version(typec_altmode2port(altmode));

}



/**

 * typec_altmode_get_data_role - Get port data role

 * @altmode: Handle to the alternate mode

 *

 * Alt Mode drivers should only issue Enter Mode through the port if they are

 * the DFP.

 */

static inline enum typec_data_role

typec_altmode_get_data_role(struct typec_altmode *altmode)

{

	return typec_get_data_role(typec_altmode2port(altmode));

}



/**

 * struct typec_altmode_driver - USB Type-C alternate mode device driver

 * @id_table: Null terminated array of SVIDs