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usb: typec: Connect Type-C port with associated USB4 port

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If USB3.x device references USB4 host interface, USB4 port can be
connected with appropriate Type-C port. By using component framework,
and in turn by creating symlinks, userspace can benefit from having
Thunderbolt/USB4 connection to Type-C ports.

Note: This change introduces dependency on Thunderbolt driver as it's
required to properly map USB4 port to Type-C port.

Signed-off-by: Alan Borzeszkowski <alan.borzeszkowski@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Alan Borzeszkowski
2025-04-14 19:55:54 +02:00
committed by Mika Westerberg
parent e80c235994
commit 4fd7a1f0f7
1 changed files with 21 additions and 2 deletions
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23
drivers/usb/typec/port-mapper.c
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@@ -8,6 +8,7 @@
#include <linux/acpi.h>
#include <linux/component.h>
#include <linux/thunderbolt.h>
#include <linux/usb.h>
#include "class.h"
@@ -36,6 +37,11 @@ struct each_port_arg {
struct component_match *match;
};
static int usb4_port_compare(struct device *dev, void *fwnode)
{
return usb4_usb3_port_match(dev, fwnode);
}
static int typec_port_compare(struct device *dev, void *fwnode)
{
return device_match_fwnode(dev, fwnode);
@@ -51,9 +57,22 @@ static int typec_port_match(struct device *dev, void *data)
if (con_adev == adev)
return 0;
if (con_adev->pld_crc == adev->pld_crc)
if (con_adev->pld_crc == adev->pld_crc) {
struct fwnode_handle *adev_fwnode = acpi_fwnode_handle(adev);
component_match_add(&arg->port->dev, &arg->match, typec_port_compare,
acpi_fwnode_handle(adev));
adev_fwnode);
/*
* If dev is USB 3.x port, it may have reference to the
* USB4 host interface in which case we can also link the
* Type-C port with the USB4 port.
*/
if (fwnode_property_present(adev_fwnode, "usb4-host-interface"))
component_match_add(&arg->port->dev, &arg->match,
usb4_port_compare, adev_fwnode);
}
return 0;
}