Help: ingenic could not detect D- usb line interruption with USB COM configuration

[TVHTrieu]

I’m using configuration in f_acm and f_hid to configure for my USB device to communicate to host. I want to detect when a D- interruption is happened, so far with f_hid is able to detect this one since it will enable USBrst bit in dwc2 while configuration with f_acm does not have any interruption event when D- is disconnected. I observed that even my device can still send data but it did not display that data on my host’s terminal. I want to ask why it has the difference on the same gadget driver? How could I configure for my USB COM can detect D- line interruption as USB HID?

[ReimuNotMoe]

Which chip and board are you using?

[TVHTrieu]

Which chip and board are you using?
I’m using ingenic x2000 with my custom board

[ReimuNotMoe]

It's probably related to the USB phy.

Disconnect and connect your USB cable and see if the contents of /sys/bus/gadget/drivers/ changes after each action.

[TVHTrieu]

Maybe I will check this later but why USB HID could signal USBrst bit while USB COM did not have any event? If it is related to endpoints configuration?

[TVHTrieu]

I have checked the /sys/bus/ but it doesn't have gadget/drivers here. How could I find the USB phy in my device?