More notes on HD-audio driver

More notes on HD-audio driver

[Takashi Iwai]

Hi,

per popular demand, I wrote a brief document more about HD-audio driver.
It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt.
The git tree is:
  git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git

You can get the text from web:
  http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD

A PDF file is found at:
  http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf

Comments, corrections and additions are appreciated.

thanks,

Takashi

Re: More notes on HD-audio driver

[stan]

Takashi Iwai wrote:
> Hi,
> 
> per popular demand, I wrote a brief document more about HD-audio driver.
> It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt.
> The git tree is:
>   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> 
> You can get the text from web:
>   http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
> 
> A PDF file is found at:
>   http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf

Thank you for this.  I found it informative and helpful.

Maybe it could be placed on the wiki or sent to the 
alsa-user list once a month as "how to troubleshoot hd audio"?

Re: More notes on HD-audio driver

[Takashi Iwai]

At Wed, 10 Dec 2008 14:45:52 -0700,
stan wrote:
> 
> Takashi Iwai wrote:
> > Hi,
> > 
> > per popular demand, I wrote a brief document more about HD-audio driver.
> > It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt.
> > The git tree is:
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> > 
> > You can get the text from web:
> >   http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
> > 
> > A PDF file is found at:
> >   http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf
> 
> Thank you for this.  I found it informative and helpful.
> 
> Maybe it could be placed on the wiki or sent to the 
> alsa-user list once a month as "how to troubleshoot hd audio"?

Putting Wiki is a good idea.  I'm not sure whether it'd be better to
put the text into Wiki or to put a link to the above URL, though...


Takashi

Re: More notes on HD-audio driver

[stan]

Takashi Iwai wrote:
> At Wed, 10 Dec 2008 14:45:52 -0700,
> 
> Putting Wiki is a good idea.  I'm not sure whether it'd be better to
> put the text into Wiki or to put a link to the above URL, though...
> 
If it isn't going to change a lot, it would be better to put 
the full text in the wiki.  But if it is going to change a 
lot, a short description and a link would be better.  I'm 
thinking of the difficulty of maintaining it in lots of 
places (a link, the pdf, the wiki).

Re: More notes on HD-audio driver

[Takashi Iwai]

At Thu, 11 Dec 2008 10:23:25 -0700,
stan wrote:
> 
> Takashi Iwai wrote:
> > At Wed, 10 Dec 2008 14:45:52 -0700,
> > 
> > Putting Wiki is a good idea.  I'm not sure whether it'd be better to
> > put the text into Wiki or to put a link to the above URL, though...
> > 
> If it isn't going to change a lot, it would be better to put 
> the full text in the wiki.  But if it is going to change a 
> lot, a short description and a link would be better.  I'm 
> thinking of the difficulty of maintaining it in lots of 
> places (a link, the pdf, the wiki).

I think the link would be enough.  Syncing contents with Wiki isn't
always so trivial.


Takashi

Re: More notes on HD-audio driver

[John L. Utz III]

Takashi Iwai wrote:
> At Thu, 11 Dec 2008 10:23:25 -0700,
> stan wrote:
>> Takashi Iwai wrote:
>>> At Wed, 10 Dec 2008 14:45:52 -0700,
>>>
>>> Putting Wiki is a good idea.  I'm not sure whether it'd be better to
>>> put the text into Wiki or to put a link to the above URL, though...
>>>
>> If it isn't going to change a lot, it would be better to put 
>> the full text in the wiki.  But if it is going to change a 
>> lot, a short description and a link would be better.  I'm 
>> thinking of the difficulty of maintaining it in lots of 
>> places (a link, the pdf, the wiki).
> 
> I think the link would be enough.  Syncing contents with Wiki isn't
> always so trivial.

+1 for that opinion!

duplicate 'authoritative' content is frequently a source of great confusion.

Please limit this to one doc in one location and propogate links to same
from whoever needs to point someone to it.

that's why we haz intrwbz. :-)

just my us$0.02;

johnu

> 
> Takashi
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

Re: More notes on HD-audio driver

[Vedran Miletić]

2008/12/10 Takashi Iwai <tiwai@suse.de>:
> Hi,
>
> per popular demand, I wrote a brief document more about HD-audio driver.
> It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt.
> The git tree is:
>  git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
>
> You can get the text from web:
>  http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
>
> A PDF file is found at:
>  http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf
>
> Comments, corrections and additions are appreciated.
>
> thanks,
>
> Takashi
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>

Nice. really interesting, and hope it will be helpful to both users
and developers.

Few suggestions:
* If no model option gives you a better result, and you are a touch
guy to fight again the evil -- grammar/spelling errors, I would
restate it as "If no model option gives you a better result, and you
are a tough guy and want to fight against evil"
* Maybe you should add codecgraph to the utils list -
http://helllabs.org/codecgraph/
* Add links to codec manafacturers (perhaps even their documentation
for HDA codecs), like Realtek, IDT, Analog Devices etc.

Keep up the great work!

-- 
Vedran Miletić
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

Re: More notes on HD-audio driver

[Takashi Iwai]

At Thu, 11 Dec 2008 00:20:13 +0100,
=?UTF-8?Q?Vedran_Mileti=C4=87?= wrote:
> 
> 2008/12/10 Takashi Iwai <tiwai@suse.de>:
> > Hi,
> >
> > per popular demand, I wrote a brief document more about HD-audio driver.
> > It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt.
> > The git tree is:
> >  git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> >
> > You can get the text from web:
> >  http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
> >
> > A PDF file is found at:
> >  http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf
> >
> > Comments, corrections and additions are appreciated.
> >
> > thanks,
> >
> > Takashi
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel@alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> >
> 
> Nice. really interesting, and hope it will be helpful to both users
> and developers.
> 
> Few suggestions:
> * If no model option gives you a better result, and you are a touch
> guy to fight again the evil -- grammar/spelling errors, I would
> restate it as "If no model option gives you a better result, and you
> are a tough guy and want to fight against evil"

Fixed.

> * Maybe you should add codecgraph to the utils list -
> http://helllabs.org/codecgraph/

Added.

> * Add links to codec manafacturers (perhaps even their documentation
> for HDA codecs), like Realtek, IDT, Analog Devices etc.

This would be nice even on Wiki or other information sources, too...
Any pointers?

BTW, the source text of the document is in sound-2.6.git tree, so if
you have a fix or a suggestion, please create a patch just like for
the kernel code.  It'd make easier to merge :)


Thanks!

Takashi

Re: More notes on HD-audio driver

[Daniel T Chen]

On 12/10/2008 06:05 AM, Takashi Iwai wrote:
>
> Comments, corrections and additions are appreciated.

Thanks for this document!  In the Power-Saving section, the path
/sys/modules/snd_hda_intel/parameters/power_save seems actually to be 
/sys/module/snd_hda_intel/parameters/power_save in 2.6.28-rc7 (no s in 
module).

Re: More notes on HD-audio driver

[Takashi Iwai]

At Wed, 10 Dec 2008 18:44:17 -0800,
Daniel T Chen wrote:
> 
> On 12/10/2008 06:05 AM, Takashi Iwai wrote:
> >
> > Comments, corrections and additions are appreciated.
> 
> Thanks for this document!  In the Power-Saving section, the path
> /sys/modules/snd_hda_intel/parameters/power_save seems actually to be 
> /sys/module/snd_hda_intel/parameters/power_save in 2.6.28-rc7 (no s in 
> module).

Thanks, it's indeed a typo.  Fixed now.


Takashi

Re: More notes on HD-audio driver

[kls.schlz]

If you prepare a Wiki for the HD-Audio, don't forget to merge somehow  
ALSA-Configuration.txt. IMO this goes together.

On Dec 11, 2008 7:24am, Takashi Iwai <tiwai@suse.de> wrote:
> At Wed, 10 Dec 2008 14:45:52 -0700,
>
> stan wrote:
>
> >
>
> > Takashi Iwai wrote:
>
> > > Hi,
>
> > >
>
> > > per popular demand, I wrote a brief document more about HD-audio  
driver.
>
> > > It's now found in sound git tree as  
Documentation/sound/alsa/HD-Audio.txt.
>
> > > The git tree is:
>
> > > git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
>
> > >
>
> > > You can get the text from web:
>
> > >  
http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
>
> > >
>
> > > A PDF file is found at:
>
> > > http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf
>
> >
>
> > Thank you for this. I found it informative and helpful.
>
> >
>
> > Maybe it could be placed on the wiki or sent to the
>
> > alsa-user list once a month as "how to troubleshoot hd audio"?
>
>
>
> Putting Wiki is a good idea. I'm not sure whether it'd be better to
>
> put the text into Wiki or to put a link to the above URL, though...
>
>
>
>
>
> Takashi
>
> _______________________________________________
>
> Alsa-devel mailing list
>
> Alsa-devel@alsa-project.org
>
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>

Re: More notes on HD-audio driver

[Takashi Iwai]

At Thu, 11 Dec 2008 10:03:34 +0000,
kls.schlz@googlemail.com wrote:
> 
> If you prepare a Wiki for the HD-Audio, don't forget to merge somehow
> ALSA-Configuration.txt. IMO this goes together.

The model list can be in another file, but I don't think it's good to
merge HD-Audio.txt and ALSA-Configuration.txt.  ALSA-Configuration.txt
contains a lot of other things.


Takashi

> 
> On Dec 11, 2008 7:24am, Takashi Iwai <tiwai@suse.de> wrote:
> > At Wed, 10 Dec 2008 14:45:52 -0700,
> >
> > stan wrote:
> >
> > >
> >
> > > Takashi Iwai wrote:
> >
> > > > Hi,
> >
> > > >
> >
> > > > per popular demand, I wrote a brief document more about HD-audio driver.
> >
> > > > It's now found in sound git tree as Documentation/sound/alsa/
> HD-Audio.txt.
> >
> > > > The git tree is:
> >
> > > >   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> >
> > > >
> >
> > > > You can get the text from web:
> >
> > > >   http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=
> blob_plain;f=Documentation/sound/alsa/HD-Audio.txt;hb=HEAD
> >
> > > >
> >
> > > > A PDF file is found at:
> >
> > > >   http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf
> >
> > >
> >
> > > Thank you for this.  I found it informative and helpful.
> >
> > >
> >
> > > Maybe it could be placed on the wiki or sent to the
> >
> > > alsa-user list once a month as "how to troubleshoot hd audio"?
> >
> >
> >
> > Putting Wiki is a good idea.  I'm not sure whether it'd be better to
> >
> > put the text into Wiki or to put a link to the above URL, though...
> >
> >
> >
> >
> >
> > Takashi
> >
> > _______________________________________________
> >
> > Alsa-devel mailing list
> >
> > Alsa-devel@alsa-project.org
> >
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> >
> 
>