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usb: typec: Make active on port altmode writable

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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@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20241213153543.v5.3.I794566684ab2965e209f326b08232006eff333f8@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Abhishek Pandit-Subedi
2024-12-13 15:35:44 -08:00
committed by Greg Kroah-Hartman
parent 100e257386
commit 183b194d8f
2 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/typec/class.c
View File

@@ -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);

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

@@ -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);