Public bug reported:
USB devices are not working on the CM4. When running `lsusb` the hub is
detected, but devices are not.
```
ubuntu@ubuntu:~$ sudo dmesg | egrep -i "dwc2|usb"
[ 0.151915] usbcore: registered new interface driver usbfs
[ 0.151976] usbcore: registered new interface driver hub
[ 0.152047] usbcore: registered new device driver usb
[ 1.125855] usbcore: registered new interface driver lan78xx
[ 1.125926] usbcore: registered new interface driver smsc95xx
[ 1.125965] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.126070] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.126318] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.765785] usb_phy_generic phy: supply vcc not found, using dummy regulator
[ 1.864470] dwc2 fe980000.usb: supply vusb_d not found, using dummy regulator
[ 1.864674] dwc2 fe980000.usb: supply vusb_a not found, using dummy regulator
[ 1.916752] dwc2 fe980000.usb: DWC OTG Controller
[ 1.916788] dwc2 fe980000.usb: new USB bus registered, assigned bus number 1
[ 1.916822] dwc2 fe980000.usb: irq 36, io mem 0xfe980000
[ 1.917028] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002,
bcdDevice= 5.15
[ 1.917040] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1.917048] usb usb1: Product: DWC OTG Controller
[ 1.917055] usb usb1: Manufacturer: Linux 5.15.0-1005-raspi dwc2_hsotg
[ 1.917062] usb usb1: SerialNumber: fe980000.usb
[ 1.917627] hub 1-0:1.0: USB hub found
[ 7.831293] usbcore: registered new interface driver brcmfmac
```
@waveform was able to confirm the issue. The line
`dtoverlay=dwc2,dr_mode=host` is present in config.txt. We suspect this
to be a dtb/kernel issue. This is happening on both armhf and arm64.
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1969689
Title:
USB devices not detected on CM4
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