Re: [alsa-devel] [PATCH 3/3] ASoC: ux500: Dynamically fill DAI driverdata on probe

[Lars-Peter Clausen]

On 12/03/2013 09:40 AM, Lee Jones wrote:
> On Mon, 02 Dec 2013, Lars-Peter Clausen wrote:
>
> > On 12/02/2013 07:00 PM, Lee Jones wrote:
> > [...]
> > > +void ux500_msp_populate_dai_drv(struct snd_soc_dai_driver *ux500_msp_dai_drv)
> > > +{
> > > +	ux500_msp_dai_drv->probe                 = ux500_msp_dai_probe;
> > > +	ux500_msp_dai_drv->suspend               = NULL;
> > > +	ux500_msp_dai_drv->resume                = NULL;
> > > +	ux500_msp_dai_drv->playback.channels_min = UX500_MSP_MIN_CHANNELS;
> > > +	ux500_msp_dai_drv->playback.channels_max = UX500_MSP_MAX_CHANNELS;
> > > +	ux500_msp_dai_drv->playback.rates        = UX500_I2S_RATES;
> > > +	ux500_msp_dai_drv->playback.formats      = UX500_I2S_FORMATS;
> > > +	ux500_msp_dai_drv->capture.channels_min  = UX500_MSP_MIN_CHANNELS;
> > > +	ux500_msp_dai_drv->capture.channels_max  = UX500_MSP_MAX_CHANNELS;
> > > +	ux500_msp_dai_drv->capture.rates         = UX500_I2S_RATES;
> > > +	ux500_msp_dai_drv->capture.formats       = UX500_I2S_FORMATS;
> > > +	ux500_msp_dai_drv->ops                   = ux500_msp_dai_ops;
> > >   };
> >
> > You can just use the same static driver for all devices. No need to
> > dynamically allocate it.
>
> How do you mean? Just create a 'static struct' instead?

Yes.

static struct snd_soc_dai_driver ux500_msp_dai_driver = {
	...
};

> > >   static const struct snd_soc_component_driver ux500_msp_component = {
> > > @@ -809,6 +742,7 @@ static const struct snd_soc_component_driver ux500_msp_component = {
> > >   static int ux500_msp_drv_probe(struct platform_device *pdev)
> > >   {
> > >   	struct ux500_msp_i2s_drvdata *drvdata;
> > > +	struct snd_soc_dai_driver *ux500_msp_dai_drv;
> > >   	int ret = 0;
> > >
> > >   	dev_dbg(&pdev->dev, "%s: Enter (pdev->name = %s).\n", __func__,
> > > @@ -863,8 +797,18 @@ static int ux500_msp_drv_probe(struct platform_device *pdev)
> > >   	}
> > >   	dev_set_drvdata(&pdev->dev, drvdata);
> > >
> > > +	ux500_msp_dai_drv = devm_kzalloc(&pdev->dev,
> > > +					 sizeof(*ux500_msp_dai_drv),
> > > +					 GFP_KERNEL);
> > > +	if (!ux500_msp_dai_drv) {
> > > +		ret = -ENOMEM;
> > > +		goto err_init_msp;
> > > +	}
> > > +
> > > +	ux500_msp_populate_dai_drv(ux500_msp_dai_drv);
> > > +
> > >   	ret = snd_soc_register_component(&pdev->dev, &ux500_msp_component,
> > > -					 &ux500_msp_dai_drv[drvdata->msp->id], 1);
> > > +					 ux500_msp_dai_drv, 1);
> > >   	if (ret < 0) {
> > >   		dev_err(&pdev->dev, "Error: %s: Failed to register MSP%d!\n",
> > >   			__func__, drvdata->msp->id);

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