On 10/7/22 11:38, Mattijs Korpershoek wrote:
On some g12a boards like the VIM3L and the SEI610, with some
USB cables/hosts, there is a long (5s) delay before
between "fastboot reboot" and the host detecting a USB reset.
This breaks tools relying on "fastboot reboot fastboot" which assume
that 1s after the command send, the board should disconnect on usb.
To reproduce, enable fastboot in U-Boot console:
=> fastboot usb 0
Then, on the host, run:
# echo "running fastboot reboot bootloader" > /dev/kmsg && fastboot reboot
bootloader
Rebooting into bootloader OKAY [ 0.003s]
Finished. Total time: 3.033s
[54074.251551] running fastboot reboot bootloader
... there is a delay of 5s before we detect a disconnection ...
[54079.041238] usb 1-7.4: USB disconnect, device number 72
[54079.239625] usb 1-7.4: new high-speed USB device number 73 using xhci_hcd
[54079.359103] usb 1-7.4: New USB device found, idVendor=1b8e,
idProduct=fada, bcdDevice= 2.27
[54079.359110] usb 1-7.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[54079.359112] usb 1-7.4: Product: USB download gadget
[54079.359114] usb 1-7.4: Manufacturer: U-Boot
[54079.359116] usb 1-7.4: SerialNumber: C8631470CC41
Note: this does not happen when we use the RST button on the board.
To fix this, re-implement a platform reset which calls
board_usb_cleanup() before resetting the board.
Shouldn't that call happen somewhere in drivers/usb/ .remove() callback
instead ?
