Re: [PATCH 3/3] soundwire: dmi-quirks: Disable ghost Realtek devices

[Charles Keepax]

On Thu, May 21, 2026 at 03:36:59PM +0200, Pierre-Louis Bossart wrote:
> On 5/21/26 10:17, Charles Keepax wrote:
> > On Wed, May 20, 2026 at 07:16:55PM +0200, Pierre-Louis Bossart wrote:
> >> On 5/20/26 18:36, Charles Keepax wrote:
> >> Could we filter instead those 'ghost' devices if they fail to
> >> appear in the new ACPI table that describes all the endpoints
> >> and card topology?
> > 
> > Eventually perhaps once that makes it out of the standardisation
> > process (I believe the committee is looking at it), but for now
> > that is all Microsoft magic that I would rather avoid.
> 
> Nothing prevents developers from reverse-engineering DSDT contents. I remember seeing all the information needed in the DSDT of one of the Dell devices.
> The standardization was supposed to happen before Covid, I looked at this in 2020-2021. If it hasn't happened by now it's unlikely it ever will...
> This DSDT information is interesting for Intel platforms, it could help probe a generic machine driver for the card but raises other problems with deferred probe,
> c.f. https://lore.kernel.org/alsa-devel/20210817190057.255264-2-pierre-louis.bossart@xxxxxxxxxxxxxxx/
> 
> Anyways this patchset isn't wrong either, so 
> 
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxx>

There is I guess an argument for starting to attempt to work
through that stuff, although still very nervous about it being
all Microsoft magic. But yeah we need to merge this guy anyway as
doing that will be a very large task and we have a lot of
shipping laptops that are failing now.

Thanks,
Charles