linux-kernel - RE: [PATCH v8] ALSA: hda/tas2781: Add tas2781 hda SPI driver

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Date: Tue, 18 Jun 2024 12:01:08 +0100
From: Simon Trimmer <simont@...nsource.cirrus.com>
To: 'Baojun Xu' <baojun.xu@...com>
CC: <robh+dt@...nel.org>, <andriy.shevchenko@...ux.intel.com>,
        <lgirdwood@...il.com>, <perex@...ex.cz>,
        <pierre-louis.bossart@...ux.intel.com>, <kevin-lu@...com>,
        <shenghao-ding@...com>, <navada@...com>, <13916275206@....com>,
        <v-hampiholi@...com>, <v-po@...com>, <niranjan.hy@...com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <liam.r.girdwood@...el.com>, <yung-chuan.liao@...ux.intel.com>,
        <broonie@...nel.org>, <soyer@....hu>, <tiwai@...e.de>
Subject: RE: [PATCH v8] ALSA: hda/tas2781: Add tas2781 hda SPI driver

> From: Baojun Xu <baojun.xu@...com>
> Sent: Friday, June 14, 2024 5:06 AM
> +static int tas2781_hda_bind(struct device *dev, struct device *master,
> +	void *master_data)
> +{
> +	struct tas2781_hda *tas_hda = dev_get_drvdata(dev);
> +	struct hda_component *comps = master_data;
> +	struct hda_codec *codec;
> +	int ret;
> +
> +	if (tas_hda->priv->index < 0 ||
> +	    tas_hda->priv->index >= HDA_MAX_COMPONENTS ||
> +	    (!comps))
> +		return -EINVAL;
> +
> +	comps = &comps[tas_hda->priv->index];
> +	if (comps->dev)
> +		return -EBUSY;
> +
> +	codec = comps->codec;
> +
> +	pm_runtime_get_sync(dev);
> +
> +	comps->dev = dev;
> +
> +	strscpy(comps->name, dev_name(dev), sizeof(comps->name));
> +
> +	ret = tascodec_spi_init(tas_hda->priv, codec, THIS_MODULE,
> +		tasdev_fw_ready);
> +	if (!ret)
> +		comps->playback_hook = tas2781_hda_playback_hook;
> +
...
> +
> +static void tas2781_hda_unbind(struct device *dev, struct device *master,
> +	void *master_data)
> +{
> +	struct tas2781_hda *tas_hda = dev_get_drvdata(dev);
> +	struct hda_component *comps = master_data;
> +
> +	comps = &comps[tas_hda->priv->index];
> +
> +	if (comps->dev == dev) {
> +		comps->dev = NULL;
> +		memset(comps->name, 0, sizeof(comps->name));
> +		comps->playback_hook = NULL;
> +	}
> +

I'd been making sure you're on CC but in addition to the other review
comments I wanted to highlight that this in for-next will affect this patch
and require similar changes to these in the i2c driver:

https://lore.kernel.org/alsa-devel/87le327f29.wl-tiwai@suse.de/T/#Z2e.:..:20
240617154105.108635-3-simont::40opensource.cirrus.com:1sound:pci:hda:tas2781
_hda_i2c.c 

-Simon