[alsa-devel] [PATCH v4 2/6] ASoC: codecs: Add msm8916-wcd digital codec

[Mark Brown]

On Tue, Sep 06, 2016 at 10:57:41AM +0100, Srinivas Kandagatla wrote:

> +static const struct soc_enum rx_mix2_inp1_chain_enum =
> +SOC_ENUM_SINGLE(LPASS_CDC_CONN_RX1_B3_CTL, 0, 3, rx_mix2_text);

Indentation again.

> +	case SND_SOC_DAPM_PRE_PMU:
> +		if (++msm8916_wcd->dmic_clk_cnt == 1) {
> +			snd_soc_update_bits(codec, dmic_clk_reg,

This looks like you're open coding a supply widget.

> +		if (dmic == 1)
> +			snd_soc_update_bits(codec, LPASS_CDC_TX1_DMIC_CTL,
> +					    TXN_DMIC_CTL_CLK_SEL_MASK,
> +					    TXN_DMIC_CTL_CLK_SEL_DIV3);
> +		if (dmic == 2)
> +			snd_soc_update_bits(codec, LPASS_CDC_TX2_DMIC_CTL,
> +					    TXN_DMIC_CTL_CLK_SEL_MASK,
> +					    TXN_DMIC_CTL_CLK_SEL_DIV3);

This looks like you want a switch statement.

> +static int msm8916_wcd_digital_enable_clock_block(struct snd_soc_codec
> +						  *codec, int enable)
> +{

> +static int msm8916_wcd_digital_codec_remove(struct snd_soc_codec *codec)
> +{
> +	return 0;
> +}

Remove empty functions.

> +static int msm8916_wcd_digital_startup(struct snd_pcm_substream *substream,
> +				       struct snd_soc_dai *dai)
> +{
> +	msm8916_wcd_digital_enable_clock_block(dai->codec, 1);
> +	return 0;
> +}
> +
> +static void msm8916_wcd_digital_shutdown(struct snd_pcm_substream *substream,
> +					 struct snd_soc_dai *dai)
> +{
> +	msm8916_wcd_digital_enable_clock_block(dai->codec, 0);
> +}

Two problems here: one is that the power management should be in DAPM,
the other is that the _enable_clock_block() function is totally
pointless - it has only these two call locations and there is absolutely
no shared code between the enable and disable paths so they should just
be inlined.

> +static int msm8916_wcd_digital_remove(struct platform_device *pdev)
> +{
> +	struct msm8916_wcd_digital_priv *priv = dev_get_drvdata(&pdev->dev);
> +
> +	clk_disable_unprepare(priv->mclk);
> +	clk_disable_unprepare(priv->ahbclk);
> +	snd_soc_unregister_codec(&pdev->dev);

This is disabling the clocks while the CODEC is still registered and
might be in use, you should unregister first.

> +static const struct of_device_id msm8916_wcd_digital_match_table[] = {
> +	{.compatible = "qcom,msm8916-wcd-digital-codec"},
> +	{}

Spaces please.

> +static struct platform_driver msm8916_wcd_digital_driver = {
> +	.driver = {
> +		   .name = "msm8916-wcd-digital-codec",
> +		   .of_match_table = msm8916_wcd_digital_match_table,
> +		   },

Please line up the }.
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