topic Re: ALSA Volume Control for imx-spdif in i.MX Processors

ALSA Volume Control for imx-spdif

carotte — Fri, 23 Jul 2021 08:45:49 GMT

Hi,

I'm using S/PDIF on imx6ull.

ALSA doesn't show any controls for this device.

Can anyone give advise on how to control volume on imx-spdif ?

Thanks!

igorpadykov — Fri, 23 Jul 2021 12:32:01 GMT

Hi Noel

one can try amixer described in sect.7.5 Audio Mixer (AUDMIX) i.MX Linux Reference Manual

imx-spdif driver is described in sect.7.4 The Sony/Philips Digital Interface (S/PDIF)

Best regards
igor

carotte — Fri, 23 Jul 2021 13:20:13 GMT

Hi Igor,

could you please elaborate further ?
amixer doesn't show any controls for this device, neither does alsamixer.

igorpadykov — Mon, 26 Jul 2021 11:29:39 GMT

Hi Noel

I asked internally and got below advice:

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Please let customer to try "alsamixer" command to check if there is one sound card named "imx-spdif"

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Best regards
igor

carotte — Mon, 26 Jul 2021 11:51:22 GMT

Hi Igor,

Thanks for your reply!

That is indeed what I did, but there are no controls available for this device.

Please find the screenshot attached.

igorpadykov — Tue, 27 Jul 2021 06:29:49 GMT

Hi Noel

from team:

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Actually, in our release, we didn't enabled spdif as default on imx6ull.

Could you help to double confirm if customer enable SPDIF correctly and the initialization is successful?

Please upload their patch and SCH if possible

------------

You can provide (if necessary) these materials usung service request.

Best regards
igor

carotte — Sun, 28 Nov 2021 02:12:42 GMT

Hi Igor,

I think the link is outdated, could you please update it ?

Thanks!