Quoting Doug Anderson (2024-02-13 17:17:34) > Hi, > > On Fri, Feb 9, 2024 at 11:10 PM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote: > > > > Describe the set of pins used to connect the detachable keyboard on > > detachable ChromeOS devices. The set of pins is called the "pogo pins". > > It's basically USB 2.0 with an extra pin for base detection. We expect > > to find a keyboard on the other side of this connector with a specific > > vid/pid, so describe that as a child device at the port of the usb > > device connected upstream. > > Can you remind me what the side effects would be if a different > VID/PID shows up there? I know it's not an end-user scenario, but I > have a pre-production "coachz" keyboard that's actually programmed > incorrectly and shows up as the wrong PID. Presumably I could either > throw the old hardware away or figure out a way to re-program it and > it's really not a big deal, but just curious what happens... As far as I know nothing happens besides ChromeOS userspace treats the keyboard as "external" so things like smarter base detection, e.g. wraparound keyboard detection or kickstand mode, may not work. I think you get a popup box telling you the keyboard isn't the trusted one.
