On Wed, Oct 04, 2023 at 11:16:09AM -0400, Pierre-Louis Bossart wrote:
matching the name is fine (if you are matching it against an existing name) but expecting the name to be anything specific is not going to work as the name is dynamic and can/will change each boot.
Not following, sorry.
In the SoundWire context, the device name directly follows the ACPI or Device Tree information, I don't really see how its name could change on each boot (assuming no DSDT override or overlays of course). The platform descriptors are pretty much fixed, aren't they?
Intel and AMD make such assumptions on names for pretty much all machine drivers, it's not really something new - probably 15+ years? Adding Mark Brown in CC: to make sure he's aware of this thread.
FWIW DT is much less affected here since all the inter-device references are explicit in the DT (modulo needing to work around breakage) so we're not hard coding in the way ACPI so unfortunately requires.