On Fri, Dec 13, 2024 at 03:35:44PM -0800, Abhishek Pandit-Subedi wrote:
> The active property of port altmode should be writable (to prevent or
> allow partner altmodes from entering) and needs to be part of
> typec_altmode_desc so we can initialize the port to an inactive state if
> desired.
>
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
>
> Changes in v5:
> - Extract port altmode ".active" changes to its own patch
>
> drivers/usb/typec/class.c | 5 +++--
> include/linux/usb/typec.h | 2 ++
> 2 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index febe453b96be..b5e67a57762c 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -458,7 +458,8 @@ 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 (!adev->ops || !adev->ops->activate)
> + if (!is_typec_port(adev->dev.parent) &&
> + (!adev->ops || !adev->ops->activate))
> return 0444;
>
> return attr->mode;
> @@ -563,7 +564,7 @@ typec_register_altmode(struct device *parent,
>
> if (is_port) {
> alt->attrs[3] = &dev_attr_supported_roles.attr;
> - alt->adev.active = true; /* Enabled by default */
> + alt->adev.active = !desc->inactive; /* Enabled by default */
> }
>
> sprintf(alt->group_name, "mode%d", desc->mode);
> diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
> index d616b8807000..252af3f77039 100644
> --- a/include/linux/usb/typec.h
> +++ b/include/linux/usb/typec.h
> @@ -140,6 +140,7 @@ int typec_cable_set_identity(struct typec_cable *cable);
> * @mode: Index of the Mode
> * @vdo: VDO returned by Discover Modes USB PD command
> * @roles: Only for ports. DRP if the mode is available in both roles
> + * @inactive: Only for ports. Make this port inactive (default is active).
> *
> * Description of an Alternate Mode which a connector, cable plug or partner
> * supports.
> @@ -150,6 +151,7 @@ struct typec_altmode_desc {
> u32 vdo;
> /* Only used with ports */
> enum typec_port_data roles;
> + bool inactive;
> };
>
> void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision);
> --
> 2.47.1.613.gc27f4b7a9f-goog
--
heikki
