usb: typec: tcpm: handle SRC_STARTUP state if cc changes

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@vger.kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20210928111639.3854174-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 0b08dd3..291d020 100644 (file)
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3922,6 +3922,7 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
                        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) ||