Re: Video over USB-C

To: Marc Baudoin <babafou%babafou.eu.org@localhost>, port-arm%netbsd.org@localhost
Subject: Re: Video over USB-C
From: Lloyd Parkes <lloyd%must-have-coffee.gen.nz@localhost>
Date: Sun, 9 Feb 2020 09:10:53 +1300


On 9/02/20 4:25 am, Marc Baudoin wrote:

As a matter of facts, uhub is not in the
/usr/src/sys/arch/evbarm/conf/GENERIC* files at all.  Is this
normal? How to get external video with NetBSD on a PINEBOOK Pro?


Most of the USB stuff is imported into the GENERIC configs via the line

    include "dev/usb/usbdevices.config"

with the result that uhub probably isn't in any of the GENERIC* configsany more.

I quick grep doesn't reveal any kernel support for the USB Billboarddevice that is required to enable the DisplayPort alternate mode that inturn would get the video passed over the USB cable to the HDMI/VGAconverter. :-(


Cheers,
Lloyd

References:
- Video over USB-C
  - From: Marc Baudoin

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