Commit db9e5470 authored by RD Babiera's avatar RD Babiera Committed by Greg Kroah-Hartman
Browse files

usb: typec: tcpm: add tcpm_port_error_recovery symbol 



Add tcpm_port_error_recovery symbol and corresponding event that runs in
tcpm_pd_event handler to set the port to the ERROR_RECOVERY state. tcpci
drivers can use the symbol to reset the port when tcpc faults affect port
functionality.

Signed-off-by: default avatarRD Babiera <rdbabiera@google.com>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231121203845.170234-5-rdbabiera@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9f802703

drivers/usb/typec/tcpm/tcpm.c

+14 −0
Original line number Diff line number Diff line
@@ -251,6 +251,7 @@ enum frs_typec_current { 
#define TCPM_FRS_EVENT		BIT(3)

#define TCPM_SOURCING_VBUS	BIT(4)

#define TCPM_PORT_CLEAN		BIT(5)

#define TCPM_PORT_ERROR		BIT(6)



#define LOG_BUFFER_ENTRIES	1024

#define LOG_BUFFER_ENTRY_SIZE	128
@@ -5487,6 +5488,10 @@ static void tcpm_pd_event_handler(struct kthread_work *work) 
					tcpm_set_state(port, tcpm_default_state(port), 0);

			}

		}

		if (events & TCPM_PORT_ERROR) {

			tcpm_log(port, "port triggering error recovery");

			tcpm_set_state(port, ERROR_RECOVERY, 0);

		}



		spin_lock(&port->pd_event_lock);

	}
@@ -5554,6 +5559,15 @@ bool tcpm_port_is_toggling(struct tcpm_port *port) 
}

EXPORT_SYMBOL_GPL(tcpm_port_is_toggling);



void tcpm_port_error_recovery(struct tcpm_port *port)

{

	spin_lock(&port->pd_event_lock);

	port->pd_events |= TCPM_PORT_ERROR;

	spin_unlock(&port->pd_event_lock);

	kthread_queue_work(port->wq, &port->event_work);

}

EXPORT_SYMBOL_GPL(tcpm_port_error_recovery);



static void tcpm_enable_frs_work(struct kthread_work *work)

{

	struct tcpm_port *port = container_of(work, struct tcpm_port, enable_frs);

include/linux/usb/tcpm.h

+1 −0
Original line number Diff line number Diff line
@@ -173,5 +173,6 @@ void tcpm_pd_hard_reset(struct tcpm_port *port); 
void tcpm_tcpc_reset(struct tcpm_port *port);

void tcpm_port_clean(struct tcpm_port *port);

bool tcpm_port_is_toggling(struct tcpm_port *port);

void tcpm_port_error_recovery(struct tcpm_port *port);



#endif /* __LINUX_USB_TCPM_H */