[PATCH v5 4/4] ASoC: airoha: Add AFE and machine driver for Airoha AN7581

[Christian Marangi]

On Fri, Aug 07, 2026 at 11:52:58PM +0100, Mark Brown wrote:
> On Fri, Aug 07, 2026 at 10:09:34PM +0200, Christian Marangi wrote:
> > Add support for the Sound system present on Airoha AN7581 SoC. This is
> > based on the mediatek AFE drivers.
> 
> > Also add the machine driver to create an actual sound card for the AFE.
> 
> This should be more patches, the machine driver should be a separate
> patch at a minimum.  Possibly PCM and ETDM drivers too.
> 

Sooo you are suggesting 3 patch? one for machine, one for basic pcm and one
for etdm?

> > +static int an7581_afe_pcm_dev_probe(struct platform_device *pdev)
> > +{
> > +	struct an7581_afe_private *afe_priv;
> > +	struct reset_control *reset;
> > +	struct mtk_base_afe *afe;
> > +	struct device *dev;
> > +	int i, irq_id, ret;
> > +	void *base;
> > +
> > +	afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
> > +	if (!afe)
> > +		return -ENOMEM;
> 
> We allocate afe here with devm_kzalloc() so everything is zero...
> 
> > +	afe->irqs = devm_kcalloc(dev, afe->irqs_size, sizeof(*afe->irqs),
> > +				 GFP_KERNEL);
> > +	if (!afe->irqs)
> > +		return -ENOMEM;
> 
> ...then we allocate an array using a size read from the struct which must
> therefore have zero elements.  We also didn't assign dev, either we
> should assign it and use it consistently or we should drop it and use
> &pdev->dev like the first allocation.
>

Nono these were just my mistake with moving code... I already fixed them...
sorry for the mistake.
 
> > +	/* register component */
> > +	ret = devm_snd_soc_register_component(&pdev->dev,
> > +					      &mtk_afe_pcm_platform,
> > +					      NULL, 0);
> > +	if (ret)
> > +		return dev_err_probe(dev, ret, "Cannot register AFE component\n");
> > +
> > +	ret = devm_snd_soc_register_component(afe->dev,
> > +					      &an7581_afe_pcm_dai_component,
> > +					      afe->dai_drivers,
> > +					      afe->num_dai_drivers);
> > +	if (ret)
> > +		return dev_err_probe(dev, ret, "Cannot register PCM DAI component\n");
> > +
> > +	platform_set_drvdata(pdev, afe);
> 
> The component registration might result in a card being instantiated so
> we need the driver data initialized before we try to register.

Sorry this was asked to be moved in the previous revision by another
review. I will revert following the pattern done in other AFE driver...

-- 
	Ansuel