[PATCH 1/4] usb: typec: tcpm: fix cc role at port reset

Frank Wang frank.wang at rock-chips.com
Sun Mar 12 19:58:40 PDT 2023

In the current implementation, the tcpm set CC1/CC2 role to open when
it do port reset would cause the VBUS removed by the Type-C partner.

The Figure 4-20 in the TCPCI 2.0 specification show that the CC1/CC2
role should set to 01b (Rp) or 10b (Rd) at Power On or Reset stage
in DRP initialization and connection detection.

So set CC1/CC2 to Rd to fix it.

Signed-off-by: Frank Wang <frank.wang at rock-chips.com>
 drivers/usb/typec/tcpm/tcpm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index a0d943d785800..66de02a56f512 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4851,7 +4851,7 @@ static void run_state_machine(struct tcpm_port *port)
 	case PORT_RESET:
-		tcpm_set_cc(port, TYPEC_CC_OPEN);
+		tcpm_set_cc(port, TYPEC_CC_RD);
 		tcpm_set_state(port, PORT_RESET_WAIT_OFF,

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