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

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Jan 8 20:37:21 CET 2010

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.

More information about the Alsa-devel mailing list