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UPSTREAM: usb: typec: tcpm: Handle vbus shutoff when in source mode

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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>
(cherry picked from commit 7771bcc7f5
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7256c3fca5557019c1ae5295de534795b666d602
This commit is contained in:
Badhri Jagan Sridharan
2021-02-01 02:02:12 -08:00
committed by Greg Kroah-Hartman
parent c0b981811a
commit 4240d4be96
1 changed files with 11 additions and 0 deletions
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11
drivers/usb/typec/tcpm/tcpm.c
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@@ -4953,6 +4953,17 @@ 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.