@@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port)
memset(modep, 0, sizeof(*modep));
}
+static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
+{
+ tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
+
+ if (port->tcpc->set_partner_usb_comm_capable)
+ port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
+}
+
static void tcpm_reset_port(struct tcpm_port *port)
{
int ret;
@@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port)
port->attached = false;
port->pd_capable = false;
port->pps_data.supported = false;
+ tcpm_set_partner_usb_comm_capable(port, false);
/*
* First Rx ID should be 0; set this to a sentinel of -1 so that
@@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port)
}
} else {
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_partner_usb_comm_capable(port,
+ !!(port->sink_request & RDO_USB_COMM));
tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
PD_T_SRC_TRANSITION);
}
@@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port)
break;
case SNK_NEGOTIATE_CAPABILITIES:
port->pd_capable = true;
+ tcpm_set_partner_usb_comm_capable(port,
+ !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
port->hard_reset_count = 0;
ret = tcpm_pd_send_request(port);
if (ret < 0) {
@@ -108,6 +108,10 @@ enum tcpm_transmit_type {
* is supported by TCPC, set this callback for TCPM to query
* whether vbus is at VSAFE0V when needed.
* Returns true when vbus is at VSAFE0V, false otherwise.
+ * @set_partner_usb_comm_capable:
+ * Optional; The USB Communications Capable bit indicates if port
+ * partner is capable of communication over the USB data lines
+ * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
*/
struct tcpc_dev {
struct fwnode_handle *fwnode;
@@ -139,6 +143,7 @@ struct tcpc_dev {
int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
bool pps_active, u32 requested_vbus_voltage);
bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
+ void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
};
struct tcpm_port;
The USB Communications Capable bit indicates if port partner is capable of communication over the USB data lines (e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low level drivers to perform chip specific operation. For instance, low level driver enables USB switches on D+/D- lines to set up data path when the bit is set. Refactored from patch initially authored by Kyle Tso <kyletso@google.com> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> --- Changes since V1: - Removed partner_usb_comm_capable flag. - Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES. --- drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++ include/linux/usb/tcpm.h | 5 +++++ 2 files changed, 18 insertions(+)