Hi, "Sid Spry" <sid@xxxxxxx> writes: > On Tue, Sep 29, 2020, at 1:33 AM, Felipe Balbi wrote: >> >> Hi, >> >> "Sid Spry" <sid@xxxxxxx> writes: >> > Hi, I can't enable USB3 with e.g. f_ncm because bcdUSB is always reset to 0x0210: >> > >> > $ sudo sh -c 'echo "0x0300" > /sys/kernel/config/usb_gadget/g11/bcdUSB' >> > $ cat /sys/kernel/config/usb_gadget/g11/bcdUSB >> > 0x0300 >> > $ sudo sh -c 'echo "fe800000.usb" > /sys/kernel/config/usb_gadget/g11/UDC' >> > $ cat /sys/kernel/config/usb_gadget/g11/bcdUSB >> > 0x0210 >> > $ tree /sys/kernel/config/usb_gadget/g11 >> > /sys/kernel/config/usb_gadget/g11 >> > ├── bcdDevice >> > ├── bcdUSB >> > ├── bDeviceClass >> > ├── bDeviceProtocol >> > ├── bDeviceSubClass >> > ├── bMaxPacketSize0 >> > ├── configs >> > │ └── c.1 >> > │ ├── bmAttributes >> > │ ├── MaxPower >> > │ ├── ncm.0 -> ../../../../usb_gadget/g11/functions/ncm.0 >> > │ └── strings >> > │ └── 0x409 >> > │ └── configuration >> > ├── functions >> > │ └── ncm.0 >> > │ ├── dev_addr >> > │ ├── host_addr >> > │ ├── ifname >> > │ ├── os_desc >> > │ │ └── interface.ncm >> > │ │ ├── compatible_id >> > │ │ └── sub_compatible_id >> > │ └── qmult >> > ├── idProduct >> > ├── idVendor >> > ├── max_speed >> > ├── os_desc >> > │ ├── b_vendor_code >> > │ ├── qw_sign >> > │ └── use >> > ├── strings >> > │ └── 0x409 >> > │ ├── manufacturer >> > │ ├── product >> > │ └── serialnumber >> > └── UDC >> > >> > Board is a RK3399 based RockPro64. >> >> what's your max_speed? >> > > $ cat /sys/kernel/config/usb_gadget/g11/max_speed > super-speed > > Looks ok. From Windows, the xHCI driver reports that the device supports > super speed but chooses high speed. I can't see this info from a Linux host. It's probably failing Rx.Detect and falling back to high-speed. Which USB Peripheral Controller is that? -- balbi
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