[PATCH v2] ASoC: sunxi: DMIC: Add controls for adjusting the mic gains

[Jernej Škrabec]

Dne ponedeljek, 29. april 2024 ob 21:49:20 GMT +2 je Joao Schim napisal(a):
> The AllWinner H6 and later SoCs that sport a DMIC block contain a set of registers to control
> the gain (left + right) of each of the four supported channels.
> 
> Add ASoC controls for changing each of the stereo channel gains using alsamixer and alike
> 
> Signed-off-by: Joao Schim <joao at schimsalabim.eu>

Reviewed-by: Jernej Skrabec <jernej.skrabec at gmail.com>

Best regards,
Jernej

> ---
>  sound/soc/sunxi/sun50i-dmic.c | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/sound/soc/sunxi/sun50i-dmic.c b/sound/soc/sunxi/sun50i-dmic.c
> index c76628bc86c6..dd32780fb6a4 100644
> --- a/sound/soc/sunxi/sun50i-dmic.c
> +++ b/sound/soc/sunxi/sun50i-dmic.c
> @@ -14,6 +14,7 @@
>  #include <sound/dmaengine_pcm.h>
>  #include <sound/pcm_params.h>
>  #include <sound/soc.h>
> +#include <sound/tlv.h>
>  
>  #define SUN50I_DMIC_EN_CTL			(0x00)
>  	#define SUN50I_DMIC_EN_CTL_GLOBE			BIT(8)
> @@ -43,6 +44,17 @@
>  	#define SUN50I_DMIC_CH_NUM_N_MASK			GENMASK(2, 0)
>  #define SUN50I_DMIC_CNT				(0x2c)
>  	#define SUN50I_DMIC_CNT_N				(1 << 0)
> +#define SUN50I_DMIC_D0D1_VOL_CTR		(0x30)
> +	#define SUN50I_DMIC_D0D1_VOL_CTR_0R			(0)
> +	#define SUN50I_DMIC_D0D1_VOL_CTR_0L			(8)
> +	#define SUN50I_DMIC_D0D1_VOL_CTR_1R			(16)
> +	#define SUN50I_DMIC_D0D1_VOL_CTR_1L			(24)
> +#define SUN50I_DMIC_D2D3_VOL_CTR                (0x34)
> +        #define SUN50I_DMIC_D2D3_VOL_CTR_2R                     (0)
> +        #define SUN50I_DMIC_D2D3_VOL_CTR_2L                     (8)
> +        #define SUN50I_DMIC_D2D3_VOL_CTR_3R                     (16)
> +        #define SUN50I_DMIC_D2D3_VOL_CTR_3L                     (24)
> +
>  #define SUN50I_DMIC_HPF_CTRL			(0x38)
>  #define SUN50I_DMIC_VERSION			(0x50)
>  
> @@ -273,8 +285,30 @@ static const struct of_device_id sun50i_dmic_of_match[] = {
>  };
>  MODULE_DEVICE_TABLE(of, sun50i_dmic_of_match);
>  
> +static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(sun50i_dmic_vol_scale, -12000, 75, 1);
> +
> +static const struct snd_kcontrol_new sun50i_dmic_controls[] = {
> +
> +        SOC_DOUBLE_TLV("DMIC Channel 0 Capture Volume", SUN50I_DMIC_D0D1_VOL_CTR,
> +                       SUN50I_DMIC_D0D1_VOL_CTR_0L, SUN50I_DMIC_D0D1_VOL_CTR_0R,
> +                       0xFF, 0, sun50i_dmic_vol_scale),
> +        SOC_DOUBLE_TLV("DMIC Channel 1 Capture Volume", SUN50I_DMIC_D0D1_VOL_CTR,
> +                       SUN50I_DMIC_D0D1_VOL_CTR_1L, SUN50I_DMIC_D0D1_VOL_CTR_1R,
> +                       0xFF, 0, sun50i_dmic_vol_scale),
> +        SOC_DOUBLE_TLV("DMIC Channel 2 Capture Volume", SUN50I_DMIC_D2D3_VOL_CTR,
> +                       SUN50I_DMIC_D2D3_VOL_CTR_2L, SUN50I_DMIC_D2D3_VOL_CTR_2R,
> +                       0xFF, 0, sun50i_dmic_vol_scale),
> +        SOC_DOUBLE_TLV("DMIC Channel 3 Capture Volume", SUN50I_DMIC_D2D3_VOL_CTR,
> +                       SUN50I_DMIC_D2D3_VOL_CTR_3L, SUN50I_DMIC_D2D3_VOL_CTR_3R,
> +                       0xFF, 0, sun50i_dmic_vol_scale),
> +
> +
> +};
> +
>  static const struct snd_soc_component_driver sun50i_dmic_component = {
>  	.name           = "sun50i-dmic",
> +	.controls	= sun50i_dmic_controls,
> +	.num_controls	= ARRAY_SIZE(sun50i_dmic_controls),
>  };
>  
>  static int sun50i_dmic_runtime_suspend(struct device *dev)
>