[PATCH 5.14 008/151] usb: typec: tcpm: handle SRC_STARTUP state if cc changes

[Greg Kroah-Hartman]

From: Xu Yang <xu.yang_2@xxxxxxx>

commit 6d91017a295e9790eec02c4e43f020cdb55f5d98 upstream.

TCPM for DRP should do the same action as SRC_ATTACHED when cc changes in
SRC_STARTUP state. Otherwise, TCPM will transition to SRC_UNATTACHED state
which is not satisfied with the Type-C spec.

Per Type-C spec:
DRP port should move to Unattached.SNK instead of Unattached.SRC if sink
removed.

Fixes: 4b4e02c83167 ("typec: tcpm: Move out of staging")
cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Acked-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
Link: https://lore.kernel.org/r/20210928111639.3854174-1-xu.yang_2@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/typec/tcpm/tcpm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4846,6 +4846,7 @@ static void _tcpm_cc_change(struct tcpm_
 			tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
 		break;
 	case SRC_ATTACHED:
+	case SRC_STARTUP:
 	case SRC_SEND_CAPABILITIES:
 	case SRC_READY:
 		if (tcpm_port_is_disconnected(port) ||