Dne 9.11.2011 06:28, ajay khandelwal napsal(a):
Hi Pavel, Thanks for reply
Simple mixer control 'IEC958 Playback AC97-SPSA',0 Capabilities: volume volume-joined penum Playback channels: Mono Capture channels: Mono Limits: 0 - 3 Mono: 3 [100%]
Thanks. I assume you mean this control. For meaning of this control see e.g. http://alsa.opensrc.org/Realtek_ALC650#SPDIF_support
It is not related to volume, IMO capabilities of this control are incorrect, there should be "enum" instead. Perhaps changing SNDRV_CTL_ELEM_TYPE_INTEGER to SNDRV_CTL_ELEM_TYPE_ENUMERATED ?
The code around this control is http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=pci/ac97/ac97_codec... . Perhaps the
.info = snd_ac97_info_volsw
should use a different method, setting the ENUM type.
Unfortunately, I do not have the HW to test any changes.
Regards,
Pavel.