probe of intel-ipu failed with error -12

Lenovo X1 Carbon Gen10
Kernel 6.0.9 with following patches:
- int3472-support-independent-clock-and-LED-gpios-5.17+.patch
- IOMMU-passthrough-for-intel-ipu.diff
- https://lore.kernel.org/linux-acpi/20221022150722.31787-1-hdegoede@redhat.com/

(self built, OS: Arch Linux)

ipu6-drivers as of today, commit a1e6f0494bcc85

I get the following error on boot:
```
kernel: intel-ipu6 intel-ipu: enabling device (0000 -> 0002)
kernel: intel-ipu6 intel-ipu: Device 0x465d (rev: 0x2)
kernel: intel-ipu6 intel-ipu: physical base address 0x603c000000
kernel: intel-ipu6 intel-ipu: mapped as: 0x000000007174b0a7
kernel: intel-ipu6 intel-ipu: IPU in secure mode
kernel: intel-ipu6 intel-ipu: IPU secure touch = 0x0
kernel: intel-ipu6 intel-ipu: IPU camera mask = 0xff
kernel: proc_thermal_pci 0000:00:04.0: enabling device (0000 -> 0002)
kernel: intel-ipu6 intel-ipu: IPC reset done
kernel: intel-ipu6 intel-ipu: cpd file name: intel/ipu6ep_fw.bin
kernel: intel_rapl_common: Found RAPL domain package
kernel: intel-ipu6 intel-ipu: FW version: 20220510
kernel: intel-ipu6: probe of intel-ipu failed with error -12
```

What am I missing?

Thanks for any suggestions.