g_ether

[peterberbec]

According to the forums, a patch is required to enable OTG gadget ethernet. The file is here. Is this enabled on any of the kernels?

[avafinger]

This patch is for Kernel 3.4.112/113.

CONFIG_USB_OTG is not set for a reason, although I have it in DTB

&usb_otg {
	dr_mode = "**otg**";
	status = "okay";
};

When configured and enabled you will experience a high avg load > 1.0 and thus generate heat. I can configure it on next release as experimental, although I don't use it and never tested it.

[peterberbec]

Can I enable it by decompiling the dtb or does it take a kernel recompilation?

[avafinger]

It needs a kernel recompilation, I was expecting kernel 4.18.6 for today and I set it for one shot and you tell the results unless you are in a hurry.

[peterberbec]

Oh great! Let me know when the deb is up and I'll test it.

Thanks for all your work. Best image out there! You actually make this sbc useful.

[avafinger]

I will build one with OTG support, takes a couple of hours...

[peterberbec]

Thanks, I'm not home anyway.

In the readme you say the board is colder if you disable hdmi. How would I go about doing that?

[avafinger]

Ok, i will do thist on 4.18.6...

[avafinger]

Please, try this kernel image and report back your findings... https://github.com/avafinger/bananapi-zero-ubuntu-base-minimal/commit/b753342f1b6122c96e4497bd3a3f5e02354e0962

[peterberbec]

[ 51.164710] udc-core: couldn't find an available UDC - added [g_ether] to list of pending drivers

[peterberbec]

Does this sound like it makes sense to this issue?

[avafinger]

Seems so, I will build a new kernel image with that config set, please report back when you test.

[avafinger]

Small question, do you have this working on 3.4.112?

[peterberbec]

I have not tested otg on the board at all. I was concentrating on i2c, spi, wifi and ethernet. I just now got around to otg.

[avafinger]

https://github.com/avafinger/bananapi-zero-ubuntu-base-minimal/commit/b91c11031eb9f7eeab91c94cd4a73d33be89f564

Built-in modules, you should have now OTG / gadget functionality. Hopefully.

[peterberbec]

Got the same dmesg output. Should I try a banana-supplied image, figure out what makes it tick, and come back? I don't want you spending hours on this if there's some trick we need to know.

I'm going to try this They claim it supports USB Ethernet. I'll report back if it works, and we can try to disect how.

[avafinger]

Maybe you should have some g_ether params like this: https://gist.github.com/dwilkins/2be58627bfdd675e3a53a011f55c5d07

Try that image and see if it is working and there are parameters to be passed to g_ether

Sounds like you can't have OTG and gadget at the same time, who knows...

[peterberbec]

Possibly. The inner workings of these devices follow rules only Dali would understand...