some configuration I'd tried:
1. dtoverlay=dwc_otg, or comment out = no difference
2. with no other dtoverlay, I actually set "dtoverlay=vc4-fkms-v3d" in
syscfg.txt, and comment it out or not also make no difference
I didn't grab every dmesg, but without both dwc_otg and vc4-fkms-v3d,
here you go:
----- pi4 -----
[ 1.677307] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.884348] Core Release: 2.80a
[ 1.888641] Setting default values for core params
[ 1.892857] Finished setting default values for core params
[ 1.966759] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[ 2.099551] Using Buffer DMA mode
[ 2.103715] Periodic Transfer Interrupt Enhancement - disabled
[ 2.107870] Multiprocessor Interrupt Enhancement - disabled
[ 2.112043] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 2.116220] Dedicated Tx FIFOs mode
[ 2.121186] WARN::dwc_otg_hcd_init:1043: FIQ DMA bounce buffers: virt =
ffff00001060b000 dma = 0x00000000f9510000 len=9024
[ 2.121384] usb 1-1: New USB device found, idVendor=2109, idProduct=3431,
bcdDevice= 4.21
[ 2.125542] FIQ FSM acceleration enabled for :
Non-periodic Split Transactions
Periodic Split Transactions
High-Speed Isochronous Endpoints
Interrupt/Control Split Transaction hack enabled
[ 2.129850] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 2.150875] dwc_otg: Microframe scheduler enabled
[ 2.155145] usb 1-1: Product: USB2.0 Hub
[ 2.155171] WARN::hcd_init_fiq:496: MPHI regs_base at ffff000010305200
[ 2.161313] hub 1-1:1.0: USB hub found
[ 2.163817] dwc_otg fe980000.usb: DWC OTG Controller
[ 2.168259] hub 1-1:1.0: 4 ports detected
[ 2.172320] dwc_otg fe980000.usb: new USB bus registered, assigned bus
number 3
[ 2.180968] dwc_otg fe980000.usb: irq 24, io mem 0x00000000
[ 2.185310] Init: Port Power? op_state=1
[ 2.189549] Init: Power Port (0)
[ 2.194099] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002,
bcdDevice= 5.03
[ 2.198369] usb usb3: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 2.202590] usb usb3: Product: DWC OTG Controller
[ 2.206801] usb usb3: Manufacturer: Linux 5.3.0-1017-raspi2 dwc_otg_hcd
[ 2.211037] usb usb3: SerialNumber: fe980000.usb
[ 2.216023] hub 3-0:1.0: USB hub found
[ 2.220290] hub 3-0:1.0: 1 port detected
[ 2.225408] dwc_otg: FIQ enabled
[ 2.225419] dwc_otg: NAK holdoff enabled
[ 2.225430] dwc_otg: FIQ split-transaction FSM enabled
[ 2.225458] Module dwc_common_port init
...
[ 5.701961] udc-core: couldn't find an available UDC - added [g_cdc] to list
of pending drivers
no more g_cdc driver related loading message afterward. so, I have to
keep using "dtoverlay=dwc2,dr_mode=peripheral" at the moment
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https://bugs.launchpad.net/bugs/1861070
Title:
Raspberry Pi 4B: USB OTG is not working
Status in linux-raspi2 package in Ubuntu:
New
Bug description:
I am using Raspberry Pi 4B (4GB) and want to make use of the OTG
functionality (g_ether). I cross checked with Raspbian to make sure
it is not a hardware issue. Extract from dmesg of Ubuntu 19.10.1 with
latest updates applied as of Jan 26th, 2020 via "apt-get update" and
"apt-get full-upgrade":
...
[ 1.514262] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.517365] dwc_otg: FIQ enabled
[ 1.517376] dwc_otg: NAK holdoff enabled
[ 1.517386] dwc_otg: FIQ split-transaction FSM enabled
[ 1.517399] Module dwc_common_port init
...
[ 6.358332] dwc2 fe980000.usb: fe980000.usb supply vusb_d not found, using
dummy regulator
[ 6.358388] dwc2 fe980000.usb: fe980000.usb supply vusb_a not found, using
dummy regulator
[ 6.358545] dwc2 fe980000.usb: Configuration mismatch. dr_mode forced to
host
[ 6.409098] dwc2 fe980000.usb: DWC OTG Controller
[ 6.409399] dwc2 fe980000.usb: new USB bus registered, assigned bus number
3
[ 6.409432] dwc2 fe980000.usb: irq 23, io mem 0xfe980000
...
[ 111.796714] udc-core: couldn't find an available UDC - added [g_ether] to
list of pending drivers
I think it is that "Configuration mismatch. dr_mode forced to host"
log entry telling me that the port is acting as HOST mode instead of
OTG mode. I have try putting these in usercfg.txt
"dtoverlay=dwc2"
"dtoverlay=dwc2,dr_mode=otg"
"dtoverlay=dwc2,dr_mode=peripheral"
and it will give the same result, no OTG functionality.
On the same hardware running Raspbian Buster, it initialise successfully.
Corresponding dmesg:
...
[ 0.567531] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 0.570391] dwc_otg: FIQ enabled
[ 0.570400] dwc_otg: NAK holdoff enabled
[ 0.570409] dwc_otg: FIQ split-transaction FSM enabled
[ 0.570421] Module dwc_common_port init
...
[ 2.507634] dwc2 fe980000.usb: fe980000.usb supply vusb_d not found, using
dummy regulator
[ 2.511011] dwc2 fe980000.usb: Linked as a consumer to regulator.0
[ 2.514450] dwc2 fe980000.usb: fe980000.usb supply vusb_a not found, using
dummy regulator
[ 2.731860] dwc2 fe980000.usb: dwc2_check_params: Invalid parameter lpm=1
[ 2.735511] dwc2 fe980000.usb: dwc2_check_params: Invalid parameter
lpm_clock_gating=1
[ 2.735522] dwc2 fe980000.usb: dwc2_check_params: Invalid parameter besl=1
[ 2.735533] dwc2 fe980000.usb: dwc2_check_params: Invalid parameter
hird_threshold_en=1
[ 2.735582] dwc2 fe980000.usb: EPs: 8, dedicated fifos, 4080 entries in
SPRAM
[ 2.752511] dwc2 fe980000.usb: DWC OTG Controller
[ 2.752554] dwc2 fe980000.usb: new USB bus registered, assigned bus number
3
[ 2.752601] dwc2 fe980000.usb: irq 36, io mem 0xfe980000
...
[ 2.848843] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 2.851601] g_ether gadget: g_ether ready
[ 2.854580] dwc2 fe980000.usb: bound driver g_ether
[ 2.998525] dwc2 fe980000.usb: new device is high-speed
[ 3.075025] dwc2 fe980000.usb: new device is high-speed
[ 3.139338] dwc2 fe980000.usb: new address 10
[ 3.154010] g_ether gadget: high-speed config #1: CDC Ethernet (ECM)
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