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Re: [RFC][PATCH 21/26] alsa: ASoC: Add JZ4740 ASoC support

To: Lars-Peter Clausen <lars@metafoo.de>
Subject: Re: [RFC][PATCH 21/26] alsa: ASoC: Add JZ4740 ASoC support
From: Liam Girdwood <lrg@slimlogic.co.uk>
Date: Thu, 03 Jun 2010 18:25:00 +0100
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@opensource.wolfsonmicro.com>, alsa-devel@alsa-project.org
In-reply-to: <4C07E37A.40502@metafoo.de>
References: <1275505397-16758-1-git-send-email-lars@metafoo.de> <1275505950-17334-5-git-send-email-lars@metafoo.de> <1275569309.3593.106.camel@odin> <4C07DD48.2050503@metafoo.de> <1275584609.3118.26.camel@odin> <4C07E37A.40502@metafoo.de>
Sender: linux-mips-bounce@linux-mips.org
On Thu, 2010-06-03 at 19:16 +0200, Lars-Peter Clausen wrote:
> Liam Girdwood wrote:
> > On Thu, 2010-06-03 at 18:50 +0200, Lars-Peter Clausen wrote:
> >   
> >>>> +    config = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai,
> >>>>         
> >> substream);
> >>     
> >>>> +    if (!prtd->dma) {
> >>>> +            const char *dma_channel_name;
> >>>> +            if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> >>>> +                    dma_channel_name = "PCM Playback";
> >>>> +            else
> >>>> +                    dma_channel_name = "PCM Capture";
> >>>> +
> >>>> +            prtd->dma = jz4740_dma_request(substream,
> >>>>         
> >> dma_channel_name);
> >>     
> >>>>     
> >>>>         
> >>> dma_channel_name variable is not required here. Just use the const
> >>>       
> >> char
> >>     
> >>> * directly.
> >>>
> >>>   
> >>>       
> >> I actually had it like that before, but I think it is much more readable
> >> in its current form.
> >>     
> >
> > I disagree, having the char pointer here just adds an extra level of
> > indirection and costs an extra two lines of code. 
> >
> > Liam 
> >   
> Hi
> 
> Could you give an concrete example of how you would code it?
> 

Sure,

if (!prtd->dma) {
          if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                   prtd->dma = jz4740_dma_request(substream, "PCM Playback");
          else
                   prtd->dma = jz4740_dma_request(substream, "PCM Capture");
}

Liam

-- 
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk


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