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platform/chrome: cros_ec_types: Support disconnect events without partners

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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: Rajmohan Mani <rajmohan.mani@intel.com>
Reviewed-by: Prashant Malani <pmalani@chromium.org>
Link: https://lore.kernel.org/r/20210205195113.20277-3-rajmohan.mani@intel.com
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Rajmohan Mani 2021-02-05 11:51:13 -08:00 committed by Benson Leung
parent 38f56061c8
commit b4b06c9772
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GPG Key ID: 736DAA268733B0C2
1 changed files with 19 additions and 7 deletions
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26
drivers/platform/chrome/cros_ec_typec.c
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@ -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;