diff options
| author | Rajmohan Mani <rajmohan.mani@intel.com> | 2021-02-05 11:51:13 -0800 |
|---|---|---|
| committer | Benson Leung <bleung@chromium.org> | 2021-02-05 16:43:09 -0800 |
| commit | b4b06c97729547d03a8f49c6774c8bd69150ea4d (patch) | |
| tree | 5c1fb517749e8d87d95ee15b27f3c86eb029c390 /drivers/platform/chrome | |
| parent | 38f56061c892c237ad4ee733cf3981a84f6b6aea (diff) | |
| download | linux-b4b06c97729547d03a8f49c6774c8bd69150ea4d.tar.bz2 | |
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: 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>
Diffstat (limited to 'drivers/platform/chrome')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_typec.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 6c7180a9a2e5..db83c03ae5cd 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -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; |