When both CC1 and CC2 pins are simultaneously pulled up, it often leads to the double Rp to Vbus cable being stuck in the SNK_ATTACH_WAIT state. And the state machine fails to transition to the SNK_ATTACHED state. Therefore, it is recommended to focus on transitioning the sink port to the SNK_DEBOUNCED state instead. By doing so, the desired outcome can be achieved more effectively. [ 134.525750] VBUS on [ 134.713240] CC1: 0 -> 3, CC2: 0 -> 3 [state TOGGLING, polarity 0, connected] [ 134.713249] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS] Signed-off-by: Michael Wu <michael@xxxxxxxxxxxxxxxxx> --- drivers/usb/typec/tcpm/tcpm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 0965972310275..9228dbd78bf2b 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -4197,6 +4197,8 @@ static void run_state_machine(struct tcpm_port *port) else if (tcpm_port_is_disconnected(port)) tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); + else if (tcpm_port_is_sink(port)) + tcpm_set_state(port, SNK_DEBOUNCED, 0); break; case SNK_DEBOUNCED: if (tcpm_port_is_disconnected(port)) -- 2.29.0
