[alsa-devel] Ac97 on Au1200- No Sound
HI!
I am working with a Au1200 based board and trying to make the audio(AC97 + STAC9752) work after applying the ASoC patch at http://opensource.wolfsonmicro.com/~git/asoc/.
After writing the machine driver for my board based on the exmmb-ac97.c as a template, my codec is being detected, which is on PSC1.
But when I play some .wav file using aplay, I get to hear the sound with a very low volume, which is almost not recognizable.
I unmuted the codec with these two commands
#amixer set "Master" 255 unmute #amixer set "PCM" 255 unmute
I also tried to watch /proc/interrupts but I am not able to see any interrupts coming on IRQ 11 that is for PSC1.
Could some one provide more insight into what might be going wrong?
Thanking in advance
regards
-Nitin
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On Fri, 2008-02-08 at 12:00 +0000, Nitin Mahajan wrote:
HI!
I am working with a Au1200 based board and trying to make the audio(AC97 + STAC9752) work after applying the ASoC patch at http://opensource.wolfsonmicro.com/~git/asoc/.
After writing the machine driver for my board based on the exmmb-ac97.c as a template, my codec is being detected, which is on PSC1.
But when I play some .wav file using aplay, I get to hear the sound with a very low volume, which is almost not recognizable.
It sounds like the AC97 link is up and running and your DMA is sending PCM data to the codec.
I unmuted the codec with these two commands
#amixer set "Master" 255 unmute #amixer set "PCM" 255 unmute
I also tried to watch /proc/interrupts but I am not able to see any interrupts coming on IRQ 11 that is for PSC1.
Could some one provide more insight into what might be going wrong?
Can you try using alsamixer. It's possible you are not unmuting the correct kcontrols.
Liam
HI! --- Liam Girdwood lg@opensource.wolfsonmicro.com wrote:
On Fri, 2008-02-08 at 12:00 +0000, Nitin Mahajan wrote:
HI!
I am working with a Au1200 based board and trying
to
make the audio(AC97 + STAC9752) work after
applying
the ASoC patch at http://opensource.wolfsonmicro.com/~git/asoc/.
After writing the machine driver for my board
based on
the exmmb-ac97.c as a template, my codec is being detected, which is on PSC1.
But when I play some .wav file using aplay, I get
to
hear the sound with a very low volume, which is
almost
not recognizable.
It sounds like the AC97 link is up and running and your DMA is sending PCM data to the codec.
I unmuted the codec with these two commands
#amixer set "Master" 255 unmute #amixer set "PCM" 255 unmute
I also tried to watch /proc/interrupts but I am
not
able to see any interrupts coming on IRQ 11 that
is
for PSC1.
Could some one provide more insight into what
might be
going wrong?
Can you try using alsamixer. It's possible you are not unmuting the correct kcontrols.
Liam
Thanks for your inputs, I was not unmuting "Headphone". Now its working for me.
regards
-Nitin
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HI! --- Liam Girdwood lg@opensource.wolfsonmicro.com wrote:
On Fri, 2008-02-08 at 12:00 +0000, Nitin Mahajan wrote:
HI!
I am working with a Au1200 based board and trying
to
make the audio(AC97 + STAC9752) work after
applying
the ASoC patch at http://opensource.wolfsonmicro.com/~git/asoc/.
After writing the machine driver for my board
based on
the exmmb-ac97.c as a template, my codec is being detected, which is on PSC1.
But when I play some .wav file using aplay, I get
to
hear the sound with a very low volume, which is
almost
not recognizable.
It sounds like the AC97 link is up and running and your DMA is sending PCM data to the codec.
I unmuted the codec with these two commands
#amixer set "Master" 255 unmute #amixer set "PCM" 255 unmute
I also tried to watch /proc/interrupts but I am
not
able to see any interrupts coming on IRQ 11 that
is
for PSC1.
Could some one provide more insight into what
might be
going wrong?
Can you try using alsamixer. It's possible you are not unmuting the correct kcontrols.
Liam
Alsa-devel mailing list Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
Using alsamixer, I unmuted every possible control there , but it did not work. Only when I used amixer to unmute the controls, they really got unmuted.
regards
-Nitin
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participants (2)
-
Liam Girdwood -
Nitin Mahajan