port-arm/49057: Raspberry Pi Audio volume control does not work

[yunixx%gmail.com@localhost]

>Number:         49057
>Category:       port-arm
>Synopsis:       Raspberry Pi Audio volume control does not work
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 31 23:20:00 +0000 2014
>Originator:     Yunis Mustafa
>Release:        evbarm-earmhf/201406251830Z
>Organization:
>Environment:
NetBSD rpi 6.99.44 NetBSD 6.99.44 (RPI.201406251830Z) #0: Wed Jun 25 20:10:53 
UTC 2014  
builds%b42.netbsd.org@localhost:/home/builds/ab/HEAD/evbarm-earmhf/201406251830Z-obj/home/builds/ab/HEAD/src/sys/arch/evbarm/compile/RPI
 evbarm
>Description:
Raspberry Pi NetBSD Audio volume control does not work. 

Used:

1. audioctl -w play.gain 
and 
2. mixerctl -w outputs.master 

to change the volume. Looks like the setting was accepted as audioctl and 
mixerctl both show the new value for them. But the volume does not have any 
change.

I tried this with my audio application via ioctl and it shows the same symptom.
>How-To-Repeat:
1. audioctl -w play.gain=2
2. audioctl -a and check the play.gain value is set to 2
3. play some audio clip . For ex. audioplay 
/usr/pkg/share/mikutter/core/skin/data/sounds/mikutter-se.wav
4. Listen to the audio volume

5. audioctl -w play.gain=222
6. audioctl -a and check the play.gain value is set to 222
7. play some audio clip . For ex. audioplay 
/usr/pkg/share/mikutter/core/skin/data/sounds/mikutter-se.wav
4. Again Listen to the audio volume and notice no change in volume.
>Fix: