Re: [PATCH v2] ASoC: sun4i-codec: Distinguish sun4i from sun7i

[Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>]

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Hi,

On Thu, Sep 08, 2016 at 09:57:59PM +0200, Danny Milosavljevic wrote:
> Introduce mechanism to detect sun7i and provide a different regmap
> and different controls for it - different compared to sun4i Allwinner A10.
> 
> The controls will be extended in a forthcoming patch - it is necessary to
> distinguish between sun4i and sun7i controls because the mic gains are in
> different registers.
> 
> Renamed SUN4I_CODEC_AC_SYS_VERI to SUN7I_CODEC_AC_DAC_CAL and renamed
> SUN4I_CODEC_AC_MIC_PHONE_CAL to SUN7I_CODEC_AC_MIC_PHONE_CAL because these
> are actually not present on Allwinner A10.
> 
> Handle quirks by regmap config and codec and select the correct quirks
> automatically.

You're doing several different things in that patch:

> 
> Signed-off-by: Danny Milosavljevic <dannym-bxPqe3T81XXwRsdMLXbzog@public.gmane.org>
> ---
>  sound/soc/sunxi/sun4i-codec.c | 78 ++++++++++++++++++++++++++++++++-----------
>  1 file changed, 58 insertions(+), 20 deletions(-)
> 
> diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
> index 0e19c50..239e330 100644
> --- a/sound/soc/sunxi/sun4i-codec.c
> +++ b/sound/soc/sunxi/sun4i-codec.c
> @@ -96,8 +96,8 @@
>  /* Other various ADC registers */
>  #define SUN4I_CODEC_DAC_TXCNT			(0x30)
>  #define SUN4I_CODEC_ADC_RXCNT			(0x34)
> -#define SUN4I_CODEC_AC_SYS_VERI			(0x38)
> -#define SUN4I_CODEC_AC_MIC_PHONE_CAL		(0x3c)
> +#define SUN7I_CODEC_AC_DAC_CAL			(0x38)
> +#define SUN7I_CODEC_AC_MIC_PHONE_CAL		(0x3c)

1) Renaming some registers

>  struct sun4i_codec {
>  	struct device	*dev;
> @@ -509,7 +509,7 @@ static const struct snd_kcontrol_new sun4i_codec_pa_mute =
>  
>  static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
>  
> -static const struct snd_kcontrol_new sun4i_codec_widgets[] = {
> +static const struct snd_kcontrol_new sun4i_codec_controls[] = {

2) Changing some structure name

>  	SOC_SINGLE_TLV("Power Amplifier Volume", SUN4I_CODEC_DAC_ACTL,
>  		       SUN4I_CODEC_DAC_ACTL_PA_VOL, 0x3F, 0,
>  		       sun4i_codec_pa_volume_scale),
> @@ -627,10 +627,60 @@ static const struct snd_soc_dapm_route sun4i_codec_codec_dapm_routes[] = {
>  	{ "Mic1", NULL, "VMIC" },
>  };
>  
> +static const struct regmap_config sun4i_codec_regmap_config = {
> +	.reg_bits	= 32,
> +	.reg_stride	= 4,
> +	.val_bits	= 32,
> +	.max_register	= SUN4I_CODEC_ADC_RXCNT,
> +};
> +
> +static const struct regmap_config sun7i_codec_regmap_config = {
> +	.reg_bits	= 32,
> +	.reg_stride	= 4,
> +	.val_bits	= 32,
> +	.max_register	= SUN7I_CODEC_AC_MIC_PHONE_CAL,
> +};

3) Adding some custom regmap configs for the A10 and A20 variants

> +struct sun4i_quirks {
> +	const struct snd_kcontrol_new *controls;
> +	unsigned int num_controls;

4) Allow to have some custom controls (but you're not using that
anywhere yet).

> +	const struct regmap_config *regmap_config;
> +};
> +
> +static const struct sun4i_quirks sun4i_quirks = {
> +	.controls = NULL,
> +	.num_controls = 0U,
> +	.regmap_config = &sun4i_codec_regmap_config,
> +};
> +
> +static const struct sun4i_quirks sun7i_quirks = {
> +	.controls = NULL,
> +	.num_controls = 0U,
> +	.regmap_config = &sun7i_codec_regmap_config,
> +};
> +
> +static const struct of_device_id sun4i_codec_of_match[] = {
> +	{ .compatible = "allwinner,sun4i-a10-codec", .data = &sun4i_quirks },
> +	{ .compatible = "allwinner,sun7i-a20-codec", .data = &sun7i_quirks },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);

This could be related to 3

> +
> +static int sun4i_codec_codec_probe(struct snd_soc_codec *scodec)
> +{
> +	const struct sun4i_quirks *quirks;
> +
> +	quirks = of_device_get_match_data(scodec->dev);
> +	return snd_soc_add_codec_controls(scodec,
> +					  quirks->controls,
> +					  quirks->num_controls);
> +}
> +
>  static struct snd_soc_codec_driver sun4i_codec_codec = {
> +	.probe = sun4i_codec_codec_probe,

And this to 4.

>  	.component_driver = {
> -		.controls		= sun4i_codec_widgets,
> -		.num_controls		= ARRAY_SIZE(sun4i_codec_widgets),
> +		.controls		= sun4i_codec_controls,
> +		.num_controls		= ARRAY_SIZE(sun4i_codec_controls),

2)

>  		.dapm_widgets		= sun4i_codec_codec_dapm_widgets,
>  		.num_dapm_widgets	= ARRAY_SIZE(sun4i_codec_codec_dapm_widgets),
>  		.dapm_routes		= sun4i_codec_codec_dapm_routes,
> @@ -678,20 +728,6 @@ static struct snd_soc_dai_driver dummy_cpu_dai = {
>  	 },
>  };
>  
> -static const struct regmap_config sun4i_codec_regmap_config = {
> -	.reg_bits	= 32,
> -	.reg_stride	= 4,
> -	.val_bits	= 32,
> -	.max_register	= SUN4I_CODEC_AC_MIC_PHONE_CAL,
> -};
> -
> -static const struct of_device_id sun4i_codec_of_match[] = {
> -	{ .compatible = "allwinner,sun4i-a10-codec" },
> -	{ .compatible = "allwinner,sun7i-a20-codec" },
> -	{}
> -};
> -MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);
> -
>  static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev,
>  							int *num_links)
>  {
> @@ -760,6 +796,7 @@ static int sun4i_codec_probe(struct platform_device *pdev)
>  {
>  	struct snd_soc_card *card;
>  	struct sun4i_codec *scodec;
> +	const struct sun4i_quirks *quirks;
>  	struct resource *res;
>  	void __iomem *base;
>  	int ret;
> @@ -777,8 +814,9 @@ static int sun4i_codec_probe(struct platform_device *pdev)
>  		return PTR_ERR(base);
>  	}
>  
> +	quirks = of_device_get_match_data(&pdev->dev);
>  	scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
> -					     &sun4i_codec_regmap_config);
> +					       quirks->regmap_config);

3

This should be in separate patches.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com