1 // SPDX-License-Identifier: GPL-2.0
28 	ret = fwnode_property_get_reference_args(fwnode, "usb4-host-interface",  in tb_acpi_add_link()
34 	if (nhi->pdev->dev.fwnode != args.fwnode)  in tb_acpi_add_link()
44 		adev = adev->parent;  in tb_acpi_add_link()
60 		dev = dev->parent;  in tb_acpi_add_link()
71 	if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI ||  in tb_acpi_add_link()
77 		link = device_link_add(&pdev->dev, &nhi->pdev->dev,  in tb_acpi_add_link()
81 			dev_dbg(&nhi->pdev->dev, "created link from %s\n",  in tb_acpi_add_link()
82 				dev_name(&pdev->dev));  in tb_acpi_add_link()
84 			dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n",  in tb_acpi_add_link()
85 				 dev_name(&pdev->dev));  in tb_acpi_add_link()
95  * tb_acpi_add_links() - Add device links based on ACPI description
106 	if (!has_acpi_companion(&nhi->pdev->dev))  in tb_acpi_add_links()
110 	 * Find all devices that have usb4-host-controller interface  in tb_acpi_add_links()
116 		dev_warn(&nhi->pdev->dev, "failed to enumerate tunneled ports\n");  in tb_acpi_add_links()
120  * tb_acpi_is_native() - Did the platform grant native TBT/USB4 control
133  * tb_acpi_may_tunnel_usb3() - Is USB3 tunneling allowed by the platform
146  * tb_acpi_may_tunnel_dp() - Is DisplayPort tunneling allowed by the platform
159  * tb_acpi_may_tunnel_pcie() - Is PCIe tunneling allowed by the platform
172  * tb_acpi_is_xdomain_allowed() - Are XDomain connections allowed
184 /* UUID for retimer _DSM: e0053122-795b-4122-8a5e-57be1d26acb3 */
194 	struct usb4_port *usb4 = port->usb4;  in tb_acpi_retimer_set_power()
200 	if (!usb4->can_offline)  in tb_acpi_retimer_set_power()
203 	adev = ACPI_COMPANION(&usb4->dev);  in tb_acpi_retimer_set_power()
208 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
213 		return -EIO;  in tb_acpi_retimer_set_power()
216 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
231 	obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_retimer_set_power()
237 		return -EIO;  in tb_acpi_retimer_set_power()
240 	ret = obj->integer.value;  in tb_acpi_retimer_set_power()
245 			return ret == 1 ? 0 : -EBUSY;  in tb_acpi_retimer_set_power()
250 	return -EIO;  in tb_acpi_retimer_set_power()
254  * tb_acpi_power_on_retimers() - Call platform to power on retimers
260  * spec). Note if this returns %-EBUSY it means the type-C port is in
261  * non-USB4/TBT mode (there is non-USB4/TBT device connected).
273  * tb_acpi_power_off_retimers() - Call platform to power off retimers
303 	list_for_each_entry(port_adev, &adev->children, node) {  in tb_acpi_find_port()
304 		if (acpi_device_adr(port_adev) == port->port)  in tb_acpi_find_port()
321 		port_adev = tb_acpi_find_port(ACPI_COMPANION(&parent_sw->dev), port);  in tb_acpi_switch_find_companion()
325 		struct tb_nhi *nhi = sw->tb->nhi;  in tb_acpi_switch_find_companion()
328 		parent_adev = ACPI_COMPANION(&nhi->pdev->dev);  in tb_acpi_switch_find_companion()
354 		return tb_acpi_find_port(ACPI_COMPANION(dev->parent),  in tb_acpi_find_companion()
355 					 tb_to_usb4_port_device(dev)->port);  in tb_acpi_find_companion()
367 	if (acpi_check_dsm(adev->handle, &retimer_dsm_guid, 1,  in tb_acpi_setup()
370 		usb4->can_offline = true;  in tb_acpi_setup()