Commit 7771bcc7 authored by Badhri Jagan Sridharan's avatar Badhri Jagan Sridharan Committed by Greg Kroah-Hartman
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usb: typec: tcpm: Handle vbus shutoff when in source mode 



While in source mode, vbus could be shutoff by protections
circuits. TCPM does not move back to toggling state to
re-initiate connection. Fix this by moving to SRC_UNATTACHED
state when vbus shuts off while in source mode.

Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarBadhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210201100212.49863-1-badhri@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 17aa02be

drivers/usb/typec/tcpm/tcpm.c

+11 −0
Original line number Diff line number Diff line
@@ -4897,6 +4897,17 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port) 
		/* Do nothing, waiting for sink detection */

		break;



	case SRC_STARTUP:

	case SRC_SEND_CAPABILITIES:

	case SRC_SEND_CAPABILITIES_TIMEOUT:

	case SRC_NEGOTIATE_CAPABILITIES:

	case SRC_TRANSITION_SUPPLY:

	case SRC_READY:

	case SRC_WAIT_NEW_CAPABILITIES:

		/* Force to unattached state to re-initiate connection */

		tcpm_set_state(port, SRC_UNATTACHED, 0);

		break;



	case PORT_RESET:

		/*

		 * State set back to default mode once the timer completes.