[PATCH v4 0/6] USB keyboard improvements for asahi / desktop systems

[Marek Vasut]

On 4/4/24 8:25 AM, Janne Grunau via B4 Relay wrote:
> Apple USB Keyboards from 2021 need quirks to be useable. The boot HID
> keyboard protocol is unfortunately not described in the first interface
> descriptor but the second. This needs several changes. The USB keyboard
> driver has to look at all (2) interface descriptors during probing.
> Since I didn't want to rebuild the USB driver probe code the Apple
> keyboards are bound to the keyboard driver via USB vendor and product
> IDs.
> To make the keyboards useable on Apple silicon devices the xhci driver
> needs to initializes rings for the endpoints of the first two interface
> descriptors. If this is causes concerns regarding regressions or memory
> use the USB_MAX_ACTIVE_INTERFACES define could be turned into a CONFIG
> option.
> Even after this changes the keyboards still do not probe successfully
> since they apparently do not behave HID standard compliant. They only
> generate reports on key events. This leads the final check whether the
> keyboard is operational to fail unless the user presses keys during the
> probe. Skip this check for known keyboards.
> Keychron seems to emulate Apple keyboards (some models even "re-use"
> Apple's USB vendor ID) so apply this quirk as well.
> 
> Some devices like Yubikeys emulate a keyboard. since u-boot only binds a
> single keyboard block this kind of devices from the USB keyboard driver.
> 
> Signed-off-by: Janne Grunau <j at jannau.net>

I picked the series, but CI indicates build errors, can you have a look ?

https://source.denx.de/u-boot/custodians/u-boot-usb/-/pipelines/20215

Thanks !