[alsa-devel] [PATCH 2/2] Davinci: DM365: Enable DaVinci Voice Codec support for DM365 EVM

Miguel Aguilar miguel.aguilar at ridgerun.com
Mon Jan 11 16:11:19 CET 2010

Mark Brown wrote:
> On Fri, Jan 08, 2010 at 11:36:59AM -0600, Miguel Aguilar wrote:
>> Mark Brown wrote:
>>> On Thu, Jan 07, 2010 at 04:17:21PM -0600, miguel.aguilar at ridgerun.com wrote:
>>>> +		if (device == 0)
>>>> +			davinci_cfg_reg(DM365_EVT2_ASP_TX);
>>>> +		else
>>>> +			davinci_cfg_reg(DM365_EVT2_VC_TX);
>>> I'd be a bit more comfortable with this if it were using something more
>>> symbolic like a #define or enum rather than checking a bare number to
>>> work out which device it's talking to.
>> The idea of these function is check at runtime if the user space application is 
>> requesting the AIC3x or the voice codec, then it will set the proper source for 
>> the dma channels, since the ASP and the Voice Codec share the same dma channels, 
>> so that's why use a #define doesn't make sense.
> I see what your code is doing but at the minute it's making this
> decision based on the device number that's being passed in by comparing
> it as a pure number.  This seems fragile - something symbolic that
> joined things up a bit more wouldn't raise eyebrows in the same way.
>> Can you check the part of this patch related to registering both codecs AIC3x 
>> and the voice codec?
> Like I say that all looks fine to me but I can't really check if the
> DaVinci code is idiomatic.

Is there any way to tell alsamixer to use the controls of one subdevice or the 

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