MLK-21478-24 usb: typec: support source only port with dual data

In case source only for power, but dual data role on USB, we
enable drp toggling for detect source(host), this is mainly for
get orientation, then keep it at SNK_ATTACHED state.

Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>

diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index 6c5c356..db3339e 100644 (file)
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -2600,7 +2600,8 @@ static bool tcpm_start_drp_toggling(struct tcpm_port *port,
        /* First toggle Rp if current state is SNK_UNATTACHED */
 
        if (port->tcpc->start_drp_toggling &&
-               port->port_type == TYPEC_PORT_DRP) {
+               (port->port_type == TYPEC_PORT_DRP ||
+                port->typec_caps.data == TYPEC_PORT_DRD)) {
                if (port->state == SRC_UNATTACHED)
                        ret = port->tcpc->start_drp_toggling(port->tcpc,
                                        tcpm_rp_cc(port), 0);
@@ -3222,6 +3223,9 @@ static void run_state_machine(struct tcpm_port *port)
                ret = tcpm_snk_attach(port);
                if (ret < 0)
                        tcpm_set_state(port, SNK_UNATTACHED, 0);
+               else if (port->port_type == TYPEC_PORT_SRC &&
+                        port->typec_caps.data == TYPEC_PORT_DRD)
+                       tcpm_log(port, "Keep at SNK_ATTACHED for USB data.");
                else
                        tcpm_set_state(port, SNK_STARTUP, 0);
                break;