linux-kernel - Re: [alsa-devel] [PATCH v3 3/5] ASoC: qcom: add sdm845 sound card support

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Date:   Mon, 9 Jul 2018 20:15:33 +0530
From:   Vinod <vkoul@...nel.org>
To:     Rohit Kumar <rohitkr@...eaurora.org>
Cc:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, plai@...eaurora.org, bgoswami@...eaurora.org,
        perex@...ex.cz, srinivas.kandagatla@...aro.org, tiwai@...e.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH v3 3/5] ASoC: qcom: add sdm845 sound card
 support

On 09-07-18, 16:16, Rohit Kumar wrote:

> > > +static int sdm845_bind(struct device *dev)
> > > +{
> > > +	struct snd_soc_card *card;
> > > +	struct sdm845_snd_data *data;
> > > +	int ret;
> > > +
> > > +	card = kzalloc(sizeof(*card), GFP_KERNEL);
> > > +	if (!card)
> > > +		return -ENOMEM;
> > > +
> > > +	/* Allocate the private data */
> > > +	data = kzalloc(sizeof(*data), GFP_KERNEL);
> > > +	if (!data)
> > > +		return -ENOMEM;
> > > +
> > > +	ret = component_bind_all(dev, card);
> > > +	if (ret) {
> > > +		dev_err(dev, "Audio components bind failed: %d\n", ret);
> > > +		goto bind_fail;
> > > +	}
> > > +
> > > +	dev_set_drvdata(dev, card);
> > > +	card->dev = dev;
> > > +	ret = qcom_snd_parse_of(card);
> > > +	if (ret) {
> > > +		dev_err(dev, "Error parsing OF data\n");
> > > +		goto parse_dt_fail;
> > > +	}
> > > +
> > > +	data->card = card;
> > > +	snd_soc_card_set_drvdata(card, data);
> > > +
> > > +	sdm845_add_be_ops(card);
> > > +
> > > +	sdm845_init_supplies(dev);
> > > +
> > > +	ret = snd_soc_register_card(card);
> > > +	if (ret) {
> > > +		dev_err(dev, "Sound card registration failed\n");
> > > +		goto register_card_fail;
> > > +	}
> > > +	return ret;
> > > +
> > > +register_card_fail:
> > > +	sdm845_deinit_supplies(dev);
> > > +	kfree(card->dai_link);
> > > +parse_dt_fail:
> > > +	component_unbind_all(dev, card);
> > > +bind_fail:
> > > +	kfree(data);
> > > +	kfree(card);
> > > +	return ret;
> > > +}
> > I would make a case for this to be moved into common too :)
> 
> There are few platform specific APIs and structs here like struct
> sdm845_snd_data,
> sdm845_add_be_ops() which needs to be initialized and assigned before
> soundcard
> registration. Moving this complete API to common will restrict it. Please
> suggest.

Yes indeed, they can be split and done outside while the common stuff
use a 'core' object and use that to initialize. If you need to do some
driver step, you can invoke a callback.

-- 
~Vinod