--- On Fri, 1/8/08, Marek Vasut marek.vasut@gmail.com wrote:
From: Marek Vasut marek.vasut@gmail.com Subject: Re: [alsa-devel] WM9712 Not Giving output To: nitinm76@yahoo.com Cc: alsa-devel@alsa-project.org Date: Friday, 1 August, 2008, 11:53 PM Dne Friday 01 of August 2008 19:59:44 Nitin Mahajan napsal(a):
HI!
--- On Fri, 1/8/08, Marek Vasut
marek.vasut@gmail.com wrote:
From: Marek Vasut marek.vasut@gmail.com Subject: Re: [alsa-devel] WM9712 Not Giving
output
To: alsa-devel@alsa-project.org,
nitinm76@yahoo.com
Date: Friday, 1 August, 2008, 11:10 PM Dne Friday 01 of August 2008 19:27:24 Nitin
Mahajan
napsal(a):
HI!
--- On Fri, 1/8/08, Mark Brown
wrote:
From: Mark Brown
broonie@opensource.wolfsonmicro.com
Subject: Re: [alsa-devel] WM9712 Not
Giving
output
To: "Nitin Mahajan"
Cc: alsa-devel@alsa-project.org,
"Manuel"
Date: Friday, 1 August, 2008, 9:32 PM On Fri, Aug 01, 2008 at 08:31:03AM
-0700, Nitin
Mahajan
wrote:
I am using a WM9712 codec chip
with the AC97
controller on AMD AU1250.
Linux kernel version 2.6.24.2.
On AC97 controller's side, I
can see the
DMA
happening on the host
processor, interrupts also coming.
This suggests a mixer configuration
problem.
On the mixer front, I did unmute
and set the
vol to
max for PCM and
Headphone. I did not find any
Master control
with this
chip. Isn't
there any master control with this
chip?
No.
If Master is not there, logically are the
enough for
playback?
amixer set 'PCM' 255 unmute amixer set 'Headphone' 255 unmute
Can some one please throw more
light on the
Mixer
part, specific to
this chip.
What Mixer controls do I need to
set with
what values
for playback and
capture respectively with this
chip?
Check the configuration of the Left HP
Mixer and
Right HP
Mixer PCM Playback switches. These should be
enabled in
order to
play back via the headphone output.
While writing the reply , the hardware is
not with me.
But I wil check these tommorow.
If you still can't get audio output
with that
please
send a copy of your mixer configuration - run the command
alsactl store -f mixer-config
to write a file 'mixer-config'
with this
information in it. Please also check your kernel log from when
the driver
is loaded
and when you configure the mixer.
There is documentation of the audio
paths
supported by the
chip in the
I saw the figure in the datasheet, its
quite
explainatory, as to which
registers are involved in which path.
datasheet, available from:
http://www.wolfsonmicro.com/products/WM9712/
and you may find the audio route
mappings in the
WM9712
driver useful to refer to - the 'audio_map'
table in the
driver
which shows how the parts of the device are connected. The
format is {
destination,
control, source }.
Thanks and regards
-Nitin
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Alsa-devel mailing list Alsa-devel@alsa-project.org
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Hi, try searching the mailing list for "[PATCH]
wm9712
mono mixer". That may help you.
Interesting, do you mean that "Right HP
Mixer" and "Left HP Mixer" should
be "Right Mixer" and "Left Mixer"
?
thanks and regards
-Nitin
yea, and you should see alsa warning about it in kernel log as well.
Do you mean in dmesg? Unfortunately I don't have hardware with me now to test. I shall do it tommorow morning.
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