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usb: typec: Add mode_control field to port property

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This new field in the port properties dictates whether the Platform Policy
Manager (PPM) allows the OS Policy Manager (OPM) to change the currently
active, negotiated alternate mode.

Signed-off-by: Andrei Kuchynski <akuchynski@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://patch.msgid.link/20260119131824.2529334-2-akuchynski@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrei Kuchynski 2026-01-19 13:18:18 +00:00 • committed by Greg Kroah-Hartman
parent 1360eb44d2
commit dfd7b082c0
3 changed files with 9 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/usb/typec/class.c
View file

@ -457,11 +457,13 @@ static umode_t typec_altmode_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj));
struct typec_port *port = typec_altmode2port(adev);
if (attr == &dev_attr_active.attr)
if (!is_typec_port(adev->dev.parent) &&
(!adev->ops || !adev->ops->activate))
return 0444;
if (!is_typec_port(adev->dev.parent)) {
if (!port->mode_control || !adev->ops || !adev->ops->activate)
return 0444;
}
return attr->mode;
}
@ -2708,6 +2710,7 @@ struct typec_port *typec_register_port(struct device *parent,
}
port->pd = cap->pd;
port->mode_control = !cap->no_mode_control;
ret = device_add(&port->dev);
if (ret) {

1
drivers/usb/typec/class.h
View file

@ -62,6 +62,7 @@ struct typec_port {
struct mutex partner_link_lock;
enum typec_orientation orientation;
bool mode_control;
struct typec_switch *sw;
struct typec_mux *mux;
struct typec_retimer *retimer;

2
include/linux/usb/typec.h
View file

@ -290,6 +290,7 @@ enum usb_pd_svdm_ver {
* @prefer_role: Initial role preference (DRP ports).
* @accessory: Supported Accessory Modes
* @usb_capability: Supported USB Modes
* @no_mode_control: Ability to manage Alternate Modes
* @fwnode: Optional fwnode of the port
* @driver_data: Private pointer for driver specific info
* @pd: Optional USB Power Delivery Support
@ -307,6 +308,7 @@ struct typec_capability {
enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
unsigned int orientation_aware:1;
u8 usb_capability;
bool no_mode_control;
struct fwnode_handle *fwnode;
void *driver_data;