cs4265 : alsactl store and "C data buffer" fails

cs4265 : alsactl store and "C data buffer" fails

[Matt Flax]

Hi,

When alsactl store is run with a cs4265 chip, the following error occurs 
(from https://github.com/Audio-Injector/Ultra/issues/25) :

$ sudo alsactl store
alsactl: get_control:256: Cannot read control '2,0,0,C Data Buffer,0': 
Input/output error


Upon commenting out the C data buffer control it works :

https://github.com/torvalds/linux/blob/master/sound/soc/codecs/cs4265.c#L163


Can you suggest a suitable method for fixing this bug ?


thanks

Matt

Re: cs4265 : alsactl store and "C data buffer" fails

[Clemens Ladisch]

Matt Flax wrote:
> When alsactl store is run with a cs4265 chip, the following error occurs (from https://github.com/Audio-Injector/Ultra/issues/25) :
>
> $ sudo alsactl store
> alsactl: get_control:256: Cannot read control '2,0,0,C Data Buffer,0': Input/output error

This sounds like a bug in cs4265_readable_register(); try replacing CS4265_SPDIF_CTL2
with CS4265_MAX_REGISTER.


Regards,
Clemens

Re: cs4265 : alsactl store and "C data buffer" fails

[Matt Flax]

Thanks Clemens for your guidance.

It worked !!!

I have posted the patch.

On 7/5/19 4:08 pm, Clemens Ladisch wrote:
> Matt Flax wrote:
>> When alsactl store is run with a cs4265 chip, the following error occurs (from https://github.com/Audio-Injector/Ultra/issues/25) :
>>
>> $ sudo alsactl store
>> alsactl: get_control:256: Cannot read control '2,0,0,C Data Buffer,0': Input/output error
> This sounds like a bug in cs4265_readable_register(); try replacing CS4265_SPDIF_CTL2
> with CS4265_MAX_REGISTER.
>
>
> Regards,
> Clemens
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