[alsa-devel] [PATCH v4 1/2] ucm: Load device-specific configuration file based on the card long name

[Takashi Iwai]

On Sun, 15 Jan 2017 11:01:15 +0100,
Lin, Mengdong wrote:
> 
> > -----Original Message-----
> > From: Takashi Iwai [mailto:tiwai at suse.de]
> > Sent: Sunday, January 15, 2017 4:25 PM
> > 
> > On Sat, 14 Jan 2017 09:23:55 +0100,
> > mengdong.lin at linux.intel.com wrote:
> > >
> > > From: Mengdong Lin <mengdong.lin at linux.intel.com>
> > >
> > > Intel DSP platform drivers are used by many different devices. For
> > > user space to differentiate them, ASoC machine drivers may use the DMI
> > > info
> > > (vendor-product-version-board) as card long name. Possible card long
> > > names
> > > are:
> > > DellInc.-XPS139343-01-0310JH
> > > ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
> > > Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
> > > ...
> > >
> > > And user space can define configuration files like
> > > longname\longname.conf for a specific device.
> > 
> > Do you mean a file name containing a backslash?
> > I didn't find the relevant code in your patch...
> 
> No, the file name doesn't contain a backslash. It means we're using the card long name as both the directory name that contains the UCM config file and the name of the config file itself.
> E.g. for the laptop Dell XPS 13, UCM will try to find a directory "DellInc.-XPS139343-01-0310JH", and then find the file " DellInc.-XPS139343-01-0310JH.conf" under the directory. If it cannot find the this file, it will fall back to open file "broadwell-rt286.conf" under directory "broadwell-rt286".

Ah, a backslash as on DOS.  Use a slash for Linux instead :)


Takashi