linux-kernel - Dell XPS 13 9370: ucsi_acpi USBC000:00: UCSI_GET

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Date:   Fri, 19 Aug 2022 15:37:00 +0200
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     linux-usb@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Dell XPS 13 9370: ucsi_acpi USBC000:00: UCSI_GET_PDOS returned 0
 bytes

Dear Linux folks,


On the Dell XPS 13 9370 with Debian sid/unstable, connecting a Dell 
DA300 port replicator Linux 5.18.16 logs a warning:

```
$ dmesg
[    0.000000] Linux version 5.18.0-4-amd64 
(debian-kernel@...ts.debian.org) (gcc-11 (Debian 11.3.0-5) 11.3.0, GNU 
ld (GNU Binutils for Debian) 2.38.90.20220713) #1 SMP PREEMPT_DYNAMIC 
Debian 5.18.16-1 (2022-08-10)
[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.18.0-4-amd64 
root=UUID=56f398e0-1e25-4fda-aa9f-611dece4b333 ro quiet
[…]
[    0.000000] DMI: Dell Inc. XPS 13 9370/0RMYH9, BIOS 1.21.0 07/06/2022
[…]
[   13.900028] ucsi_acpi USBC000:00: UCSI_GET_PDOS returned 0 bytes
```

```
$ lsusb
Bus 002 Device 003: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 
Gigabit Ethernet Adapter
Bus 002 Device 002: ID 2109:0820 VIA Labs, Inc. VL820 Hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 003: ID 0bda:58f4 Realtek Semiconductor Corp. 
Integrated_Webcam_HD
Bus 001 Device 006: ID 27c6:5385 Shenzhen Goodix Technology Co.,Ltd. 
Fingerprint Reader
Bus 001 Device 005: ID 06c4:c412 Bizlink International Corp. DELL DA300
Bus 001 Device 002: ID 2109:2820 VIA Labs, Inc. VL820 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
```

How can that warning be addressed?


Kind regards,

Paul
View attachment "20220819--linux-5.18.16--dmesg-2.txt" of type "text/plain" (75315 bytes)