RE: CMI9780 and ALSA volume control

RE: CMI9780 and ALSA volume control

[C.L. Tien - 田承禮]

9780 has no PCM volume control, master volume control doesn't control the PCM, either. This feature is the same as other C-Media AC97 Codecs.

I once posted a patch that tune PCM volume in SW way (change PCM data in DMA buffer), but it was not accepted.

Sincerely,
ChenLi Tien


-----Original Message-----
From:	Andre Hesling [mailto:ahessling@gmx.de]
Sent:	2004/4/11 [星期日] 下午 03:23
To:	alsa-devel@lists.sourceforge.net; alsa-user@lists.sourceforge.net
Cc:	
Subject:	[Alsa-devel] CMI9780 and ALSA volume control
Hi!

I've recently bought a new PC from a german manufacteur called Aldi/Medion. It has the CMI9780 chip on board which is fairly new and compatible to AC97.
In my kernel 2.6.5-mm1 with ALSA 1.0.4rc2 I activated support for the Intel controller (intel8x0) and it seemed to work just fine.
I get sound output and alsamixer has all important controls activated.
But the controls "Master" and "PCM" have no function. I can only mute/unmute PCM. Master has absolutely no function.
Fortunately the output level is rather high and in XMMS I can use the software mixer of the ALSA plugin.

But it would be nice if I could control these things with alsamixer or such a tool.

Any hints?

Thank you!

Here is an output of aadebug:
ALSA Audio Debug v0.0.7 - So Apr 11 19:07:27 GMT 2004
http://alsa.opensrc.org/?aadebug

Kernel ---------------------------------------------ALSA Audio Debug v0.0.7 - So Apr 11 19:07:27 GMT 2004
http://alsa.opensrc.org/?aadebug

Kernel ----------------------------------------------------
Linux merkur 2.6.5-mm1 #2 SMP Sun Apr 11 11:50:44 GMT 2004 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

Loaded Modules --------------------------------------------

Modules Conf ----------------------------------------------
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.1 2003/08/05 21:07:55 johnm Exp $
alias char-major-116 snd
alias char-major-14 soundcore
## You need to customise this section for your specific sound card(s)
## alias snd-card-0 snd-interwave
## alias snd-card-1 snd-ens1371
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
options snd cards_limit=1

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30 08:19:30 2004 UTC).
Compiled on Apr  9 2004 for kernel 2.6.5-mm1 (SMP).
0 [ICH5           ]: ICH - Intel ICH5
                     Intel ICH5 at 0xfa801000, irq 17
  1:       : sequencer
  0: [0- 0]: ctl
 20: [0- 4]: digital audio playback
 27: [0- 3]: digital audio capture
 26: [0- 2]: digital audio capture
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
 33:       : timer
00-00: Intel ICH : Intel ICH5 : playback 1 : capture 1
00-01: Intel ICH - MIC ADC : Intel ICH5 - MIC ADC : capture 1
00-02: Intel ICH - MIC2 ADC : Intel ICH5 - MIC2 ADC : capture 1
00-03: Intel ICH - ADC2 : Intel ICH5 - ADC2 : capture 1
00-04: Intel ICH - IEC958 : Intel ICH5 - IEC958 : playback 1

Dev Snd ---------------------------------------------------
controlC0  pcmC0D0p  pcmC0D2c  pcmC0D4p  timer
pcmC0D0c   pcmC0D1c  pcmC0D3c  seq

CPU -------------------------------------------------------
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz		: 2992.756
cpu MHz		: 2992.756

RAM -------------------------------------------------------
MemTotal:       515672 kB
SwapTotal:      755012 kB

Hardware --------------------------------------------------
0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
0000:02:02.0 Multimedia controller: Philips Semiconductors SAA7134 (rev 01)
-------
Linux rambo 2.6.5-mm1 #2 SMP Sun Apr 11 11:50:44 GMT 2004 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

Loaded Modules --------------------------------------------

Modules Conf ----------------------------------------------
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.1 2003/08/05 21:07:55 johnm Exp $
alias char-major-116 snd
alias char-major-14 soundcore
## You need to customise this section for your specific sound card(s)
## alias snd-card-0 snd-interwave
## alias snd-card-1 snd-ens1371
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
options snd cards_limit=1

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30 08:19:30 2004 UTC).
Compiled on Apr  9 2004 for kernel 2.6.5-mm1 (SMP).
0 [ICH5           ]: ICH - Intel ICH5
                     Intel ICH5 at 0xfa801000, irq 17
  1:       : sequencer
  0: [0- 0]: ctl
 20: [0- 4]: digital audio playback
 27: [0- 3]: digital audio capture
 26: [0- 2]: digital audio capture
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
 33:       : timer
00-00: Intel ICH : Intel ICH5 : playback 1 : capture 1
00-01: Intel ICH - MIC ADC : Intel ICH5 - MIC ADC : capture 1
00-02: Intel ICH - MIC2 ADC : Intel ICH5 - MIC2 ADC : capture 1
00-03: Intel ICH - ADC2 : Intel ICH5 - ADC2 : capture 1
00-04: Intel ICH - IEC958 : Intel ICH5 - IEC958 : playback 1

Dev Snd ---------------------------------------------------
controlC0  pcmC0D0p  pcmC0D2c  pcmC0D4p  timer
pcmC0D0c   pcmC0D1c  pcmC0D3c  seq

CPU -------------------------------------------------------
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz		: 2992.756
cpu MHz		: 2992.756

RAM -------------------------------------------------------
MemTotal:       515672 kB
SwapTotal:      755012 kB

Hardware --------------------------------------------------
0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
0000:02:02.0 Multimedia controller: Philips Semiconductors SAA7134 (rev 01)
-- 
Regards,
  Andre 


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Re: CMI9780 and ALSA volume control

[André Heßling]

On Mon, 12 Apr 2004 11:04:55 +0800
C.L. Tien - _____ <cltien@cmedia.com.tw> wrote:

> 9780 has no PCM volume control, master volume control doesn't control the PCM, either. This feature is the same as other C-Media AC97 Codecs.
> 
> I once posted a patch that tune PCM volume in SW way (change PCM data in DMA buffer), but it was not accepted.
> 
> Sincerely,
> ChenLi Tien

Ok, thanks so far!
Can you tell me where I can find this patch? I would give it a try then.

And is only the PCM control affected or may even LineIn and Mic have no control?
As I see you have something to do with cmedia:
On the homepage it is written that there should exist a driver for Linux.
But I can't find it or any drivers for 9780.
-- 
Regards,
  André


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Re: CMI9780 and ALSA volume control

[Oliver Gerlich]

André Heßling schrieb:
> On Mon, 12 Apr 2004 11:04:55 +0800
> C.L. Tien - _____ <cltien@cmedia.com.tw> wrote:
> 
> 
>>9780 has no PCM volume control, master volume control doesn't control the PCM, either. This feature is the same as other C-Media AC97 Codecs.
>>
>>I once posted a patch that tune PCM volume in SW way (change PCM data in DMA buffer), but it was not accepted.
>>
>>Sincerely,
>>ChenLi Tien
> 
> 
> Ok, thanks so far!
> Can you tell me where I can find this patch? I would give it a try then.
> 
> And is only the PCM control affected or may even LineIn and Mic have no control?
> As I see you have something to do with cmedia:
> On the homepage it is written that there should exist a driver for Linux.
> But I can't find it or any drivers for 9780.

There exists CMedia's cmaudio driver for CMI9739/A; maybe it works for 
your chip as well. It does volume scaling in software, but unfortunately 
it only supports OSS and seems to be buggy.

At the moment I'm using the snd-intel8x0 driver, so I'm interested in 
the PCM patch as well; does someone know where I can find it? I've 
already asked about software volume scaling at the Linux audio user 
list, but I'm not that experienced enough with ALSA to write a plugin 
which does the job.

If the new Aldi PC has such a chip, maybe there'll be more people who 
need a solution for this problem :)


Oliver Gerlich



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Re: CMI9780 and ALSA volume control

[Takashi Iwai]

At Mon, 12 Apr 2004 11:04:55 +0800,
C.L. Tien <cltien@cmedia.com.tw> wrote:
> 
> 9780 has no PCM volume control, master volume control doesn't
> control the PCM, either. This feature is the same as other C-Media
> AC97 Codecs. 
> 
> I once posted a patch that tune PCM volume in SW way (change PCM
> data in DMA buffer), but it was not accepted. 

IMO, doing this s/w volume in the driver is not the optimal
solution.  i prefer having this feature in alsa-lib. 

the only drawback of implementing in alsa-lib is that the kernel OSS
emulation cannot support it, and that would surely annoy people.


Takashi


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Re: CMI9780 and ALSA volume control

[Måns Rullgård]

Takashi Iwai <tiwai@suse.de> writes:

> At Mon, 12 Apr 2004 11:04:55 +0800,
> C.L. Tien <cltien@cmedia.com.tw> wrote:
>> 
>> 9780 has no PCM volume control, master volume control doesn't
>> control the PCM, either. This feature is the same as other C-Media
>> AC97 Codecs. 
>> 
>> I once posted a patch that tune PCM volume in SW way (change PCM
>> data in DMA buffer), but it was not accepted. 
>
> IMO, doing this s/w volume in the driver is not the optimal
> solution.  i prefer having this feature in alsa-lib. 
>
> the only drawback of implementing in alsa-lib is that the kernel OSS
> emulation cannot support it, and that would surely annoy people.

In a way that's a good thing.  If OSS doesn't work more people will
request ALSA support from applications.

-- 
Måns Rullgård
mru@kth.se



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Re: Re: CMI9780 and ALSA volume control

[André Heßling]

On Tue, 13 Apr 2004 20:38:28 +0200
Måns Rullgård <mru@kth.se> wrote:

> In a way that's a good thing.  If OSS doesn't work more people will
> request ALSA support from applications.

OSS is deprecated,  isn't it?
Maybe it is possible to write an (optional) patch to implement S/W volume for alsa-lib. But I don't know how difficult that is so I should be quiet. :)
-- 
Regards,
  André


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This SF.Net email is sponsored by: IBM Linux Tutorials
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administration.http://ads.osdn.com/?ad_id\x1470&alloc_id638&op=click

CMI9780 and ALSA volume control

[André Heßling]

Hi!

I've recently bought a new PC from a german manufacteur called Aldi/Medion. It has the CMI9780 chip on board which is fairly new and compatible to AC97.
In my kernel 2.6.5-mm1 with ALSA 1.0.4rc2 I activated support for the Intel controller (intel8x0) and it seemed to work just fine.
I get sound output and alsamixer has all important controls activated.
But the controls "Master" and "PCM" have no function. I can only mute/unmute PCM. Master has absolutely no function.
Fortunately the output level is rather high and in XMMS I can use the software mixer of the ALSA plugin.

But it would be nice if I could control these things with alsamixer or such a tool.

Any hints?

Thank you!

Here is an output of aadebug:
ALSA Audio Debug v0.0.7 - So Apr 11 19:07:27 GMT 2004
http://alsa.opensrc.org/?aadebug

Kernel ---------------------------------------------ALSA Audio Debug v0.0.7 - So Apr 11 19:07:27 GMT 2004
http://alsa.opensrc.org/?aadebug

Kernel ----------------------------------------------------
Linux merkur 2.6.5-mm1 #2 SMP Sun Apr 11 11:50:44 GMT 2004 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

Loaded Modules --------------------------------------------

Modules Conf ----------------------------------------------
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.1 2003/08/05 21:07:55 johnm Exp $
alias char-major-116 snd
alias char-major-14 soundcore
## You need to customise this section for your specific sound card(s)
## alias snd-card-0 snd-interwave
## alias snd-card-1 snd-ens1371
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
options snd cards_limit=1

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30 08:19:30 2004 UTC).
Compiled on Apr  9 2004 for kernel 2.6.5-mm1 (SMP).
0 [ICH5           ]: ICH - Intel ICH5
                     Intel ICH5 at 0xfa801000, irq 17
  1:       : sequencer
  0: [0- 0]: ctl
 20: [0- 4]: digital audio playback
 27: [0- 3]: digital audio capture
 26: [0- 2]: digital audio capture
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
 33:       : timer
00-00: Intel ICH : Intel ICH5 : playback 1 : capture 1
00-01: Intel ICH - MIC ADC : Intel ICH5 - MIC ADC : capture 1
00-02: Intel ICH - MIC2 ADC : Intel ICH5 - MIC2 ADC : capture 1
00-03: Intel ICH - ADC2 : Intel ICH5 - ADC2 : capture 1
00-04: Intel ICH - IEC958 : Intel ICH5 - IEC958 : playback 1

Dev Snd ---------------------------------------------------
controlC0  pcmC0D0p  pcmC0D2c  pcmC0D4p  timer
pcmC0D0c   pcmC0D1c  pcmC0D3c  seq

CPU -------------------------------------------------------
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz		: 2992.756
cpu MHz		: 2992.756

RAM -------------------------------------------------------
MemTotal:       515672 kB
SwapTotal:      755012 kB

Hardware --------------------------------------------------
0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
0000:02:02.0 Multimedia controller: Philips Semiconductors SAA7134 (rev 01)
-------
Linux rambo 2.6.5-mm1 #2 SMP Sun Apr 11 11:50:44 GMT 2004 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

Loaded Modules --------------------------------------------

Modules Conf ----------------------------------------------
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.1 2003/08/05 21:07:55 johnm Exp $
alias char-major-116 snd
alias char-major-14 soundcore
## You need to customise this section for your specific sound card(s)
## alias snd-card-0 snd-interwave
## alias snd-card-1 snd-ens1371
## alias sound-slot-0 snd-card-0
## alias sound-slot-1 snd-card-1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## alias sound-service-1-0 snd-mixer-oss
## alias sound-service-1-3 snd-pcm-oss
## alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
options snd cards_limit=1

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30 08:19:30 2004 UTC).
Compiled on Apr  9 2004 for kernel 2.6.5-mm1 (SMP).
0 [ICH5           ]: ICH - Intel ICH5
                     Intel ICH5 at 0xfa801000, irq 17
  1:       : sequencer
  0: [0- 0]: ctl
 20: [0- 4]: digital audio playback
 27: [0- 3]: digital audio capture
 26: [0- 2]: digital audio capture
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
 33:       : timer
00-00: Intel ICH : Intel ICH5 : playback 1 : capture 1
00-01: Intel ICH - MIC ADC : Intel ICH5 - MIC ADC : capture 1
00-02: Intel ICH - MIC2 ADC : Intel ICH5 - MIC2 ADC : capture 1
00-03: Intel ICH - ADC2 : Intel ICH5 - ADC2 : capture 1
00-04: Intel ICH - IEC958 : Intel ICH5 - IEC958 : playback 1

Dev Snd ---------------------------------------------------
controlC0  pcmC0D0p  pcmC0D2c  pcmC0D4p  timer
pcmC0D0c   pcmC0D1c  pcmC0D3c  seq

CPU -------------------------------------------------------
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
model name	: Intel(R) Pentium(R) 4 CPU 3.00GHz
cpu MHz		: 2992.756
cpu MHz		: 2992.756

RAM -------------------------------------------------------
MemTotal:       515672 kB
SwapTotal:      755012 kB

Hardware --------------------------------------------------
0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
0000:02:02.0 Multimedia controller: Philips Semiconductors SAA7134 (rev 01)
-- 
Regards,
  André 


-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id\x1470&alloc_id638&op=click