Re: [PATCH v2] soundwire: qcom: adjust autoenumeration timeout

[Srinivas Kandagatla]

On 09/05/2022 15:36, Pierre-Louis Bossart wrote:
> > > > Even if enumeration timeout, we will not access the registers because
> > > > the ASoC codec is not registered yet from WCD938x component master.
> > >
> > > What happens when the codec is registered then? the autoenumeration
> > Codec is only registered after reset and when both TX and RX components
> > are probed.
> >
> > > still didn't complete, so what prevents the read/writes from failing
> > > then?
> > If codec is reset and registered and for some reason autoenum took more
> > than 100ms which will be hw bug then :-).
> > In this case register read/writes will fail.
>
> Does this reset result in the 'bus reset' in the SoundWire sence and
> restart hence the autoenumeration?
The reset am referring here is codec reset gpio line. on reset device 
will show up on the bus which should trigger an autoenumeration.

> It looks like you have a race between different components and starting
> the bus before it's needed, no?WCD938x is bit of a odd hw configuration, that is why we are using 
Component framework for this codec. This does ensure most part of it.

--srini