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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: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210201100212.49863-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Badhri Jagan Sridharan 2021-02-01 02:02:12 -08:00 committed by Greg Kroah-Hartman
parent 17aa02beec
commit 7771bcc7f5
1 changed files with 11 additions and 0 deletions
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11
drivers/usb/typec/tcpm/tcpm.c
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@ -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.