g_dbgp doesn't work #1907
Description
Hi, I'm trying to use the g_dbgp module Gadget driver to debug Chromebook firmware, and it doesn't work. The module loads without problem, and /dev/ttyGS0 gets created but there is no output.
Using the module with a BeagleBone Black works without problem and I can see output from the firmware on boot, so I know the EHCI debug port on the Chromebook side of things is configured and working correctly.
I enabled the module by enabling EHCI debug gadget in menuconfig under rpi-source, then running:
make modules_prepare
make M=drivers/usb/gadget, for f in $(find drivers/usb/gadget/ -name *.ko); do sudo cp
depmod -a
modprobe g_dbgp (with no other Gadget modules loaded).
Can you help me to get some debug output and get to the bottom of why it's not working?
Thanks.