linux-kernel - Re: [PATCH v2 4/4] ASoC: amd: acp: Add machine driver that enables sound for systems with a ES8336 codec

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Date:   Thu, 24 Aug 2023 23:03:12 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Marian Postevca <posteuca@...ex.one>
Cc:     Takashi Iwai <tiwai@...e.com>, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/4] ASoC: amd: acp: Add machine driver that enables
 sound for systems with a ES8336 codec

On Fri, Aug 25, 2023 at 12:01:35AM +0300, Marian Postevca wrote:

> +static int acp_asoc_suspend_pre(struct snd_soc_card *card)
> +{
> +	int ret;
> +
> +	ret = acp_ops_suspend_pre(card);
> +	if (ret == 1)
> +		return 0;
> +	else
> +		return ret;
> +}
> +
> +static int acp_asoc_resume_post(struct snd_soc_card *card)
> +{
> +	int ret;
> +
> +	ret = acp_ops_resume_post(card);
> +	if (ret == 1)
> +		return 0;
> +	else
> +		return ret;
> +}

This feels like it should've been part of the prior commit adding
support for more complex cards?

> +	card->drvdata = (struct acp_card_drvdata *)pdev->id_entry->driver_data;
> +	acp_card_drvdata = card->drvdata;
> +	acp_card_drvdata->acpi_mach = (struct snd_soc_acpi_mach *)pdev->dev.platform_data;

Similarly these changes in probe() - 

> +	{
> +		.name = "acp3x-es83xx",
> +		.driver_data = (kernel_ulong_t)&es83xx_rn_data,
> +	},

The main thing I'd expect to see in the generic code in a patch adding a
specific driver is table entries like this and the ones you had earlier.

> +		if (drv_data->hs_codec_id == ES83XX) {
> +			rc = acp_ops_configure_link(card, &links[i]);
> +			if (rc != 0) {
> +				dev_err(dev, "Failed to configure link for ES83XX: %d\n", rc);
> +				return rc;
> +			}
> +		}

This function should ideally have been using switch statemnts but that's
not an issue your patch introduced.

> +#define ES83XX_ENABLE_DMIC	BIT(4)
> +#define ES83XX_48_MHZ_MCLK	BIT(5)

> +static void acp3x_es83xx_set_gpios_values(struct acp3x_es83xx_private *priv,
> +					  bool speaker, bool headphone)
> +{
> +	gpiod_set_value_cansleep(priv->gpio_speakers, speaker);
> +	gpiod_set_value_cansleep(priv->gpio_headphone, headphone);
> +}

I'm not clear what this function buys us other than just calling gpiolib
directly in the DAPM events?

Otherewise the actual machine driver looks good.

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