USB devices not detected on CM4

[William Wilson]

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.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1969689

[Juerg Haefliger (juergh)]

Works for me:

ubuntu@rpi-cm4-rev1d0-0643:~$ sudo dmesg | egrep -i "dwc2|usb"
[ 0.158689] usbcore: registered new interface driver usbfs
[ 0.158752] usbcore: registered new interface driver hub
[ 0.158821] usbcore: registered new device driver usb
[ 0.991698] usbcore: registered new interface driver lan78xx
[ 0.991775] usbcore: registered new interface driver smsc95xx
[ 0.991820] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.991920] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.992017] uhci_hcd: USB Universal Host Controller Interface driver
[ 3.240675] usb_phy_generic phy: supply vcc not found, using dummy regulator
[ 3.337533] dwc2 fe980000.usb: supply vusb_d not found, using dummy regulator
[ 3.346914] dwc2 fe980000.usb: supply vusb_a not found, using dummy regulator
[ 3.406469] dwc2 fe980000.usb: DWC OTG Controller
[ 3.411464] dwc2 fe980000.usb: new USB bus registered, assigned bus number 1
[ 3.418734] dwc2 fe980000.usb: irq 21, io mem 0xfe980000
[ 3.424358] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.15
[ 3.432800] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 3.440191] usb usb1: Product: DWC OTG Controller
[ 3.444994] usb usb1: Manufacturer: Linux 5.15.0-1005-raspi dwc2_hsotg
[ 3.451638] usb usb1: SerialNumber: fe980000.usb
[ 3.456787] hub 1-0:1.0: USB hub found
[ 3.858285] usb 1-1: new high-speed USB device number 2 using dwc2
[ 4.070527] usb 1-1: New USB device found, idVendor=0424, idProduct=2514, bcdDevice= b.b3
[ 4.078886] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 4.088386] hub 1-1:1.0: USB hub found
[ 11.138369] usbcore: registered new interface driver brcmfmac
[ 158.995621] usb 1-1.2: new low-speed USB device number 3 using dwc2
[ 159.107792] usb 1-1.2: New USB device found, idVendor=093a, idProduct=2510, bcdDevice= 1.00
[ 159.116349] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 159.123850] usb 1-1.2: Product: USB Optical Mouse
[ 159.128698] usb 1-1.2: Manufacturer: PixArt
[ 159.171337] usbcore: registered new interface driver usbhid
[ 159.177047] usbhid: USB HID core driver
[ 159.196745] input: PixArt USB Optical Mouse as /devices/platform/soc/fe980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/0003:093A:2510.0001/input/input0
[ 159.209904] hid-generic 0003:093A:2510.0001: input,hidraw0: USB HID v1.11 Mouse [PixArt USB Optical Mouse] on usb-fe980000.usb-1.2/input0
ubuntu@rpi-cm4-rev1d0-0643:~$ lsusb
Bus 001 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 002: ID 0424:2514 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[Dave Jones (waveform)]

@juergh Hmmm, what's the revision code on your CM4? I'm wondering if you've got either a different revision board, or if you've got a different RAM amount (both jawn-smith and I are testing on 4GB RAM variants and I wonder, given the history of issues with USB on the Pi4 on the higher-RAM models, whether something similar could be occurring?)

[Dave Jones (waveform)]

Argh, I'm an idiot -- had the flashing cable plugged into the micro-USB while the keyboard was *also* plugged into the USB-A sockets (which I knew doesn't work and apparently missed when originally debugging this). Closing as invalid.