linux-kernel - RE: [PATCH Resend 7/8] ASoC: add snd_soc_of_parse_audio_simple

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Date:	Fri, 24 Jan 2014 02:46:33 +0000
From:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>
To:	Mark Brown <broonie@...nel.org>
CC:	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"kuninori.morimoto.gx@...esas.com" <kuninori.morimoto.gx@...esas.com>,
	"moinejf@...e.fr" <moinejf@...e.fr>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH Resend 7/8] ASoC: add
 snd_soc_of_parse_audio_simple_widgets for DeviceTree


> > +static struct snd_soc_dapm_widget simple_widgets[] = {
> > +	SND_SOC_DAPM_MIC("Mic", NULL),
> > +	SND_SOC_DAPM_LINE("Line", NULL),
> > +	SND_SOC_DAPM_HP("Hp", NULL),
> > +	SND_SOC_DAPM_SPK("Spk", NULL),
> > +};
> 

This is the templates for "Microphone XXX", "Line XXX", "Headphone XXX"
and "Spk XXX" .



> Does this mean we're restricted to a particular set of names?  That
> seems sad and won't work if there's a desire for more than one of a
> given widget - the main use case I can see is multiple microphones with
> separate microphone biases.  How about having some templates that we
> copy and then replace the name with the one the user supplied?
> 

This code has already supplied this I think.

Using this API, the only limitation is that, for example if the user has
multiple Microphones, it should set the name in DT file like:

"Mic XXX", "Mic YYY", "Mic ZZZ"...

And these widgets will use the template of : SND_SOC_DAPM_MIC("Mic", NULL),
And the widgets' names will be replaced with "Mic XXX", "Mic YYY",
"Mic ZZZ"... from the user's DT node.



Or your suggestion is ：

The templates is:
+static struct snd_soc_dapm_widget simple_widgets[] = {
+	SND_SOC_DAPM_MIC("Mic", NULL),
+	SND_SOC_DAPM_LINE("Line", NULL),
+	SND_SOC_DAPM_HP("Hp", NULL),
+	SND_SOC_DAPM_SPK("Spk", NULL),
+};

And in the DT node:
simple-off-codec-widgets = 
/*	template-name	user-supplied-name	*/
	"Mic",		"Microphone XXX",
	"Mic",		"UUU Microphone YYY",
	"Hp",		"TTT Headphone XXX",
	"Hp",		"Headphone YYY";

And then just replace the template's name with the user supplied name?


Thanks,

Best Regards,
Xiubo