using amixer to set iec958 controls

[claudiubeznea]

Hi,

I have a Linux driver for a IEC958 device (SPDIFTX) which exports the following controls:
root@sama7g5ek-sd:~# amixer controls
numid=1,iface=PCM,name='IEC958 Playback Default'
numid=2,iface=PCM,name='IEC958 Playback Mask'
numid=3,iface=PCM,name='IEC958 Playback Mask',index=1
numid=4,iface=PCM,name='IEC958 Playback Mask',index=2
numid=5,iface=PCM,name='IEC958 Playback Mask',index=3
numid=6,iface=PCM,name='IEC958 Subcode Playback Default'

I can set control numid=1,iface=PCM,name='IEC958 Playback Default' using iecset application. I cannot find a way to pass the control ID to iecset. I tried -n numid option but with no success.

Using amixer I cannot find a way to pass data to my controls. I looked a bit a though amixer source code and it looked to me that it cannot be done (but I may be wrong as I have zero experience with this project).

Do you know how can I set control numid=6,iface=PCM,name='IEC958 Subcode Playback Default' that I have?

The alsamixer version I have installed on my target is 1.2.1.

Thank you,
Claudiu Beznea