Hi all,

I've to take again the HDA codec for Wolfson because I see that I can't change the master volume. I would like to know how can I do to get with amixer an entry for master o pcm volume.

Now I have:

~ # amixer Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'IEC958 Default PCM',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'Stereo Differential',0 Capabilities: pvolume pswitch Playback channels: Front Left - Front Right Limits: Playback 0 - 127 Mono: Front Left: Playback 106 [83%] [-10.50dB] [on] Front Right: Playback 106 [83%] [-10.50dB] [on]

but I only can enable or disable the audio with

# amixer sset 'IEC958' on / off

but no master sound control is present...

with

# amixer sset 'Stereo Differential' 100% or # amixer sset 'Stereo Differential' 0%

there is no difference.

Any hint is welcome Thanks!

Jorge

________________________________________ From: Mark Brown [broonie@opensource.wolfsonmicro.com] Sent: Monday, March 05, 2012 1:16 PM To: Jorge Fernandez Monteagudo Cc: Takashi Iwai; alsa-devel@alsa-project.org Subject: Re: [alsa-devel] Support new HDA codec

On Thu, Mar 01, 2012 at 10:44:23AM +0100, Jorge Fernandez Monteagudo wrote:

Attached it's the patch applied to alsa 1.0.23. A new patch_wolfson.c file is created. I would like to note that no Wolfson support was received to develop to this code, and this code is useful for us because we only need

Hrm, that's not strictly accurate - we didn't help with the code but I know there's been some help (possibly via the distributor).

the outputs differential and SPDIF. This code must be revisited in order to support the different inputs, the stereo normal output and the I/O.

Looking at the code it seems like most of this is things that I'd really expect the generic driver to be able to cope with assuming a suitable BIOS setup, but looking at the generic driver it seems like it might need some enhancement to do so. Things like the S/PIDF output should really be able to Just Work. Hrm.

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