[alsa-devel] idt blue jack patch

[Wu Fengguang]

On Fri, Feb 20, 2009 at 07:18:31PM +0200, Takashi Iwai wrote:
> At Fri, 20 Feb 2009 09:00:01 +0800,
> Wu Fengguang wrote:
> > 
> > Hi Tobin,
> > 
> > Here are the Linux and WinXP pin configurations.
> > Both Linux and WinXP configure node 0x0c as an output pin.
> > 
> > However the driver seems to be offering three schemes:
> > 
> >         scheme desc             0xC dev
> > ------------------------------------------------------
> >         IDS_CONFIG_OPEN         Speaker_Side/LineIn
> >         IDS_CONFIG_51           LineIn
> >         IDS_CONFIG_71           Speaker_Side
> > 
> > Paulo, maybe you can run these commands to switch between
> > linein/lineout modes:
> > 
> >         # wget http://www.kernel.org/pub/linux/kernel/people/tiwai/misc/hda-verb-0.3.tar.bz2
> > 
> >         # set PIN_IN mode
> >         hda-verb /dev/snd/hwC0D2 0x0c SET_PIN_WIDGET_CONTROL 0x20
> > 
> >         # set PIN_OUT mode
> >         hda-verb /dev/snd/hwC0D2 0x0c SET_PIN_WIDGET_CONTROL 0x40
> 
> 
> Regarding the default pin configurations.
> I made a series of patches to add the interface to change the default
> pincfg values dynamically via hwdep sysfs.  The patches are found in
> test/hda-pincfg branch of sound git tree
>     git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
> 
> and included in the very latest alsa-driver-unstable snapshot
>     ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-unstable-snapshot.tar.gz
> 
> Basically, you can get / set the default pincfg values on the fly, and
> trigger the codec reconfiguration after that.
> 
> The init_pin_configs file shows the initial default pincfgs set by BIOS.
> 
> 	# cat /sys/class/sound/hwC0D0/init_pin_configs
> 	0x14 0x9993013f
> 	0x15 0x01014c10
> 	0x16 0x99030120
> 	0x18 0x01a19c30
> 	0x19 0x02a11c31
> 	0x1a 0x01813c32
> 	0x1b 0x02211c1f
> 	0x1c 0x99330133
> 	0x1d 0x411111f0
> 	0x1e 0x411111f0
> 	0x1f 0x411111f0
> 
> Then, you can override the default value by writing to
> override_pin_configs sysfs file.
> 
> 	# cat /sys/class/sound/hwC0D0/override_pin_configs
> 	# echo 0x1d 0x02a11c30 > /sys/class/sound/hwC0D0/override_pin_configs
> 	# cat /sys/class/sound/hwC0D0/override_pin_configs
> 	0x1d 0x02a11c30
> 
> Note that this value won't appear in init_pin_configs.
> 
> Also, there is another file, cur_pin_configs.  This contains the
> pincfgs that are set by the driver explicitly.  For example,
> the static pincfg table in patch_sigmatel.c appears here.
> 
> Then you can trigger the codec reconfiguration by
> 
> 	# echo 1 > /sys/class/sound/hwC0D0/reconfig
> 
> This will re-setup the driver based on the given pin configs.
> 
> Unfortunately, in the current scenario, it can't override the static
> pincfg table in the driver like in patch_sigmatel.c.  It's just for
> fixing and BIOS setup.

If override_pin_configs cannot override the values in cur_pin_configs
(or will it later?), then the name is kind of misleading.

How about the names bios_pin_configs, driver_pin_configs and user_pin_configs?

Thanks,
Fengguang