Messages in this thread Patch in this message | | | From | Frank Wang <> | Subject | [PATCH 1/4] usb: typec: tcpm: fix cc role at port reset | Date | Mon, 13 Mar 2023 10:58:40 +0800 |
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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@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) break; case PORT_RESET: tcpm_reset_port(port); - tcpm_set_cc(port, TYPEC_CC_OPEN); + tcpm_set_cc(port, TYPEC_CC_RD); tcpm_set_state(port, PORT_RESET_WAIT_OFF, PD_T_ERROR_RECOVERY); break; -- 2.17.1
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