Bug 219616

Summary: xhci_pci does not activate uPD720202
Product: Drivers Reporter: Harald Buchholz (z.b)
Component: USBAssignee: Default virtual assignee for Drivers/USB (drivers_usb)
Status: RESOLVED ANSWERED    
Severity: blocking CC: linux-usb, michal.pecio
Priority: P3    
Hardware: All   
OS: Linux   
Kernel Version: 6.12.5 Subsystem:
Regression: Yes Bisected commit-id:

Description Harald Buchholz 2024-12-20 15:18:55 UTC 
Concerning:
04:00.0 USB controller: Renesas Technology Corp. uPD720202 USB 3.0 Host Controller (rev 02) (prog-if 30 [XHCI])
        Flags: bus master, fast devsel, latency 0, IRQ 19
        Memory at fe6fe000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: <access denied>
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci

Although xhci_pci is loaded, lsusb does not show any Linux Foundation 3.0 root hub.
Device is detected and works properly, when computer is booted with 6.11.0.
Comment 1 Michał Pecio 2024-12-20 21:45:45 UTC 
Is this lspci output from the working 6.11 system?

On 6.12 you should see
        Kernel driver in use: xhci-pci-renesas
        Kernel modules: xhci_pci, xhci_pci_renesas

and you need CONFIG_USB_XHCI_PCI_RENESAS to have this module if you are building your own kernel, see commit 25f51b76f90f.
Comment 2 Artem S. Tashkinov 2024-12-22 07:39:11 UTC 
Please bisect:

https://docs.kernel.org/admin-guide/bug-bisect.html
Comment 3 Harald Buchholz 2025-01-03 11:43:05 UTC 
CONFIG_USB_XHCI_PCI_RENESAS and loading this module make it work. This option and module weren't required in 5.x.