@@ -459,9 +459,16 @@ static umode_t typec_altmode_attr_is_visible(struct kobject *kobj,
struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj));
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)) {
+ struct typec_partner *partner =
+ to_typec_partner(adev->dev.parent);
+ struct typec_port *port =
+ to_typec_port(partner->dev.parent);
+
+ if (!port->alt_mode_override || !adev->ops ||
+ !adev->ops->activate)
+ return 0444;
+ }
return attr->mode;
}
@@ -2681,6 +2688,7 @@ struct typec_port *typec_register_port(struct device *parent,
}
port->pd = cap->pd;
+ port->alt_mode_override = cap->alt_mode_override;
ret = device_add(&port->dev);
if (ret) {
@@ -80,6 +80,8 @@ struct typec_port {
*/
struct device *usb2_dev;
struct device *usb3_dev;
+
+ bool alt_mode_override;
};
#define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
@@ -304,6 +304,7 @@ struct typec_capability {
enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
unsigned int orientation_aware:1;
u8 usb_capability;
+ bool alt_mode_override;
struct fwnode_handle *fwnode;
void *driver_data;
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> --- drivers/usb/typec/class.c | 14 +++++++++++--- drivers/usb/typec/class.h | 2 ++ include/linux/usb/typec.h | 1 + 3 files changed, 14 insertions(+), 3 deletions(-)