re: NetBSD, Thinkpad laptops and docking stations?

[matthew green <mrg%eterna23.net@localhost>]

Brian Buhrow writes:
> 	hello everyone!  I'm thinking about updating my laptop environment and I'd like to use
> NetBSD to do it.  I see on the wiki pages Lenovo Thinkpads are well supported.  However, I'm
> wondering how devices attached via the USB-C docking stations work?  Do they show up as devices
> on the USB sub-system?  For example, the docking station I'm looking at is attached to the
> laptop via a USB-C cable, but has two Display ports, 1 Gigabit ethernet, 1 audio jack and
> number of USB ports, as well as an HDMI port.  How do the video, ethernet and audio devices on
> the docking station present themselves to the OS?
>
> If someone has somd dmesg output showing the attachments, that would be awesome!

i have P51, and it's dock.  (i was hoping it would have a
real serial port, but it doesn't... oh well.)

it has discrete and igpu as well, and the igpu can only talk
to the display, not any of the ports (on the laptop, or the
dock.)  eventually we got nouveau working there, and i now get
3 additional "DP-n" outputs in xrandr.

the dock USB appears to attach to both xhci controllers, eg
usbdevs shows:

Controller /dev/usb0:
addr 0: super speed, self powered, config 1, xHCI root hub(0x0000), NetBSD(0x0000), rev 1.00(0x0100)
 port 4 addr 1: super speed, self powered, config 1, Lenovo ThinkPad WS Dock(0x305a), LENOVO(0x17ef), rev 50.11(0x5011)
  port 4 addr 4: super speed, self powered, config 1, Lenovo ThinkPad WS Dock(0x305b), LENOVO(0x17ef), rev 50.11(0x5011)
Controller /dev/usb1:
addr 0: high speed, self powered, config 1, xHCI root hub(0x0000), NetBSD(0x0000), rev 1.00(0x0100)
 port 4 addr 5: high speed, self powered, config 1, Lenovo ThinkPad WS Dock(0x305a), LENOVO(0x17ef), rev 50.10(0x5010)
  port 4 addr 7: high speed, self powered, config 1, Lenovo ThinkPad WS Dock(0x305b), LENOVO(0x17ef), rev 50.10(0x5010)

when i eject from the laptop, a lot of usb devices go away.

i'll play around with it being plugged in or not to see what
happens with the DP-n's, and send a you some dmesg.

huh, i just noticed they have slightly different "rev".


.mrg.