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Date:   Mon, 9 May 2022 09:36:31 -0500
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Subject: Re: [PATCH v2] soundwire: qcom: adjust autoenumeration timeout
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To:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        vkoul@kernel.org
Cc:     alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
        bard.liao@intel.com,
        Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
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From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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>>> 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?

It looks like you have a race between different components and starting
the bus before it's needed, no?