linux-kernel - Re: [PATCH 23/25] ASoC: sun8i-codec: Generalize AIF clock control

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Message-ID: <20201005120459.5w5ligbconuwnzdv@gilmour.lan>
Date:   Mon, 5 Oct 2020 14:04:59 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Chen-Yu Tsai <wens@...e.org>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Ondrej Jirman <megous@...ous.com>, alsa-devel@...a-project.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 23/25] ASoC: sun8i-codec: Generalize AIF clock control

Hi,

On Wed, Sep 30, 2020 at 09:11:46PM -0500, Samuel Holland wrote:
> The AIF clock control register has the same layout for all three AIFs.
> The only difference between them is that AIF3 is missing some fields. We
> can reuse the same register field definitions for all three registers,
> and use the DAI ID to select the correct register address.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
>  sound/soc/sunxi/sun8i-codec.c | 64 +++++++++++++++++++----------------
>  1 file changed, 34 insertions(+), 30 deletions(-)
> 
> diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c
> index 032a3f714dbb..1c34502ac47a 100644
> --- a/sound/soc/sunxi/sun8i-codec.c
> +++ b/sound/soc/sunxi/sun8i-codec.c
> @@ -37,23 +37,23 @@
>  #define SUN8I_MOD_CLK_ENA_DAC				2
>  #define SUN8I_MOD_RST_CTL				0x014
>  #define SUN8I_MOD_RST_CTL_AIF1				15
>  #define SUN8I_MOD_RST_CTL_ADC				3
>  #define SUN8I_MOD_RST_CTL_DAC				2
>  #define SUN8I_SYS_SR_CTRL				0x018
>  #define SUN8I_SYS_SR_CTRL_AIF1_FS			12
>  #define SUN8I_SYS_SR_CTRL_AIF2_FS			8
> -#define SUN8I_AIF1CLK_CTRL				0x040
> -#define SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD		15
> -#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV			13
> -#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV		9
> -#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV		6
> -#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ		4
> -#define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT		2
> +#define SUN8I_AIF_CLK_CTRL(n)				(0x040 * (1 + (n)))
> +#define SUN8I_AIF_CLK_CTRL_MSTR_MOD			15
> +#define SUN8I_AIF_CLK_CTRL_CLK_INV			13
> +#define SUN8I_AIF_CLK_CTRL_BCLK_DIV			9
> +#define SUN8I_AIF_CLK_CTRL_LRCK_DIV			6
> +#define SUN8I_AIF_CLK_CTRL_WORD_SIZ			4
> +#define SUN8I_AIF_CLK_CTRL_DATA_FMT			2
>  #define SUN8I_AIF1_ADCDAT_CTRL				0x044
>  #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_ENA		15
>  #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_ENA		14
>  #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_SRC		10
>  #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_SRC		8
>  #define SUN8I_AIF1_DACDAT_CTRL				0x048
>  #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA		15
>  #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA		14
> @@ -83,21 +83,21 @@
>  #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R		10
>  #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR		9
>  #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR		8
>  
>  #define SUN8I_SYSCLK_CTL_AIF1CLK_SRC_MASK	GENMASK(9, 8)
>  #define SUN8I_SYSCLK_CTL_AIF2CLK_SRC_MASK	GENMASK(5, 4)
>  #define SUN8I_SYS_SR_CTRL_AIF1_FS_MASK		GENMASK(15, 12)
>  #define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK		GENMASK(11, 8)
> -#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV_MASK	GENMASK(14, 13)
> -#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK	GENMASK(12, 9)
> -#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK	GENMASK(8, 6)
> -#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK	GENMASK(5, 4)
> -#define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT_MASK	GENMASK(3, 2)
> +#define SUN8I_AIF_CLK_CTRL_CLK_INV_MASK		GENMASK(14, 13)
> +#define SUN8I_AIF_CLK_CTRL_BCLK_DIV_MASK	GENMASK(12, 9)
> +#define SUN8I_AIF_CLK_CTRL_LRCK_DIV_MASK	GENMASK(8, 6)
> +#define SUN8I_AIF_CLK_CTRL_WORD_SIZ_MASK	GENMASK(5, 4)
> +#define SUN8I_AIF_CLK_CTRL_DATA_FMT_MASK	GENMASK(3, 2)
>  
>  #define SUN8I_CODEC_PASSTHROUGH_SAMPLE_RATE 48000
>  
>  #define SUN8I_CODEC_PCM_FORMATS	(SNDRV_PCM_FMTBIT_S8     |\
>  				 SNDRV_PCM_FMTBIT_S16_LE |\
>  				 SNDRV_PCM_FMTBIT_S20_LE |\
>  				 SNDRV_PCM_FMTBIT_S24_LE |\
>  				 SNDRV_PCM_FMTBIT_S20_3LE|\
> @@ -223,32 +223,34 @@ static int sun8i_codec_update_sample_rate(struct sun8i_codec *scodec)
>  			   hw_rate << SUN8I_SYS_SR_CTRL_AIF1_FS);
>  
>  	return 0;
>  }
>  
>  static int sun8i_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
>  {
>  	struct sun8i_codec *scodec = snd_soc_dai_get_drvdata(dai);
> +	u32 reg = SUN8I_AIF_CLK_CTRL(dai->id);
>  	u32 format, invert, value;
>  
>  	/* clock masters */
>  	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
>  	case SND_SOC_DAIFMT_CBS_CFS: /* Codec slave, DAI master */
>  		value = 0x1;
>  		break;
>  	case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master, DAI slave */
>  		value = 0x0;
>  		break;
>  	default:
>  		return -EINVAL;
>  	}
> -	regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
> -			   BIT(SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD),
> -			   value << SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD);
> +
> +	regmap_update_bits(scodec->regmap, reg,
> +			   BIT(SUN8I_AIF_CLK_CTRL_MSTR_MOD),
> +			   value << SUN8I_AIF_CLK_CTRL_MSTR_MOD);

I guess it would be more readable without the intermediate variable to
store the register.

With that fixed,
Acked-by: Maxime Ripard <mripard@...nel.org>

Maxime

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