Re: [PATCH v2 00/20] Add SDCA UMP/FDL support

[Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>]

On 9/12/25 12:34, Charles Keepax wrote:
> Next installment of the SDCA changes, hopefully the next series after
> this should be the full class driver. It is worth noting this series has
> a build dependency on a patch working its way through the PM/ACPI tree:
> 
> commit ac46f5b6c661 ("ACPICA: Add SoundWire File Table (SWFT) signature")
> git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
> 
> But we can probably worry about that later, as normally there is a
> reasonable amount of review on these SDCA series'.
> 
> This series broadly breaks down into 3 chunks, first there are several
> changes to remove the assumption that the struct device used for SDCA
> purposes represents the SoundWire slave. This is because the SDCA class
> driver will be made of an auxiliary driver for each SDCA Function, thus
> the SoundWire slave will be on the parent device for each individual
> driver. Then there are patches to add support for UMP/FDL. And then
> finally since the rest of the HID support is there and UMP was the last
> missing part required a small patch to add a function to allow reporting
> of HID events from SDCA devices.

This is starting to look quite good... 
There are still a number of opens on the UMP flows, but I won't be able to follow-up until late Fall so no objections from me if this is merged and later improved.
Thanks Charles and Maciej for this contribution!