Unverified Commit b4b06c97 authored by Rajmohan Mani's avatar Rajmohan Mani Committed by Benson Leung
Browse files

platform/chrome: cros_ec_types: Support disconnect events without partners 



There are certain scenarios, where a disconnect event might
occur on a Type-C port with no port partners. This is required
to enable communication to Burnside Bridge USB4 retimers.

Signed-off-by: default avatarRajmohan Mani <rajmohan.mani@intel.com>
Reviewed-by: default avatarPrashant Malani <pmalani@chromium.org>
Link: https://lore.kernel.org/r/20210205195113.20277-3-rajmohan.mani@intel.com


Signed-off-by: default avatarBenson Leung <bleung@chromium.org>
parent 38f56061

drivers/platform/chrome/cros_ec_typec.c

+19 −7
Original line number Diff line number Diff line
@@ -203,20 +203,26 @@ static void cros_typec_unregister_altmodes(struct cros_typec_data *typec, int po 
	}

}



static void cros_typec_remove_partner(struct cros_typec_data *typec,

				     int port_num)

static int cros_typec_usb_disconnect_state(struct cros_typec_port *port)

{

	struct cros_typec_port *port = typec->ports[port_num];



	cros_typec_unregister_altmodes(typec, port_num, true);



	port->state.alt = NULL;

	port->state.mode = TYPEC_STATE_USB;

	port->state.data = NULL;



	usb_role_switch_set_role(port->role_sw, USB_ROLE_NONE);

	typec_switch_set(port->ori_sw, TYPEC_ORIENTATION_NONE);

	typec_mux_set(port->mux, &port->state);



	return typec_mux_set(port->mux, &port->state);

}



static void cros_typec_remove_partner(struct cros_typec_data *typec,

				      int port_num)

{

	struct cros_typec_port *port = typec->ports[port_num];



	cros_typec_unregister_altmodes(typec, port_num, true);



	cros_typec_usb_disconnect_state(port);



	typec_unregister_partner(port->partner);

	port->partner = NULL;
@@ -536,6 +542,11 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num, 
	enum typec_orientation orientation;

	int ret;



	if (mux_flags == USB_PD_MUX_NONE) {

		ret = cros_typec_usb_disconnect_state(port);

		goto mux_ack;

	}



	if (mux_flags & USB_PD_MUX_POLARITY_INVERTED)

		orientation = TYPEC_ORIENTATION_REVERSE;

	else
@@ -569,6 +580,7 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num, 
			mux_flags);

	}



mux_ack:

	if (!typec->needs_mux_ack)

		return ret;