linux-kernel - Re: [PATCH 4/7] ASoC: amd: add ACP3x TDM mode support

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Message-ID: <ae25c498-dac1-ec27-cd47-622d94d45e5b@amd.com>
Date:   Fri, 25 Oct 2019 07:06:54 +0000
From:   vishnu <vravulap@....com>
To:     "RAVULAPATI, VISHNU VARDHAN RAO" 
        <Vishnuvardhanrao.Ravulapati@....com>
CC:     "Deucher, Alexander" <Alexander.Deucher@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "Mukunda, Vijendar" <Vijendar.Mukunda@....com>,
        Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@....com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/7] ASoC: amd: add ACP3x TDM mode support

Hi Mark,

Any updates on this patch.

Regards,
Vishnu

On 19/10/19 2:35 AM, Ravulapati Vishnu vardhan rao wrote:
> ACP3x I2S (CPU DAI) can act in normal I2S and TDM modes. Added support
> for TDM mode. Desired mode can be selected from ASoC machine driver.
> 
> Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
> ---
>   sound/soc/amd/raven/acp3x-i2s.c | 51 +++++++++++++++++++++++++++++++++--------
>   sound/soc/amd/raven/acp3x.h     |  2 ++
>   2 files changed, 43 insertions(+), 10 deletions(-)
> 
> diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
> index b7f610f..7e22d22 100644
> --- a/sound/soc/amd/raven/acp3x-i2s.c
> +++ b/sound/soc/amd/raven/acp3x-i2s.c
> @@ -43,7 +43,8 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
>   		u32 rx_mask, int slots, int slot_width)
>   {
>   	u32 val = 0;
> -	u16 slot_len;
> +	u32 mode = 0;
> +	u16 slot_len, flen;
>   
>   	struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai);
>   
> @@ -64,16 +65,46 @@ static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
>   		return -EINVAL;
>   	}
>   
> -	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
> -	rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER);
> -	val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
> -	rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER);
> +	/* Enable I2S / BT channels TDM and respective
> +	 * I2S/BT`s TX/RX Formats frame lengths.
> +	 */
> +	flen = (FRM_LEN | (slots << 15) | (slot_len << 18));
>   
> -	val = (FRM_LEN | (slots << 15) | (slot_len << 18));
> -	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT);
> -	rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT);
> -
> -	adata->tdm_fmt = val;
> +	if (adata->substream_type == SNDRV_PCM_STREAM_PLAYBACK) {
> +		switch (adata->i2s_instance) {
> +		case I2S_BT_INSTANCE:
> +			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER);
> +			rv_writel((val | 0x2),
> +				adata->acp3x_base + mmACP_BTTDM_ITER);
> +			rv_writel(flen,
> +				adata->acp3x_base + mmACP_BTTDM_TXFRMT);
> +		break;
> +		case I2S_SP_INSTANCE:
> +			val = rv_readl(adata->acp3x_base + mmACP_I2STDM_ITER);
> +			rv_writel((val | 0x2),
> +				adata->acp3x_base + mmACP_I2STDM_ITER);
> +			rv_writel(flen,
> +				adata->acp3x_base + mmACP_I2STDM_TXFRMT);
> +		}
> +	} else {
> +		switch (adata->i2s_instance) {
> +		case I2S_BT_INSTANCE:
> +			val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER);
> +			rv_writel((val | 0x2),
> +				adata->acp3x_base + mmACP_BTTDM_IRER);
> +			rv_writel(flen,
> +				adata->acp3x_base + mmACP_BTTDM_RXFRMT);
> +		break;
> +		case I2S_SP_INSTANCE:
> +		default:
> +			val = rv_readl(adata->acp3x_base + mmACP_I2STDM_IRER);
> +			rv_writel((val | 0x2),
> +				adata->acp3x_base + mmACP_I2STDM_IRER);
> +			rv_writel(flen,
> +				adata->acp3x_base + mmACP_I2STDM_RXFRMT);
> +		}
> +	}
> +	adata->tdm_fmt = flen;
>   	return 0;
>   }
>   
> diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
> index b1990c9..dba7065 100644
> --- a/sound/soc/amd/raven/acp3x.h
> +++ b/sound/soc/amd/raven/acp3x.h
> @@ -76,6 +76,8 @@ struct i2s_dev_data {
>   	bool tdm_mode;
>   	unsigned int i2s_irq;
>   	u32 tdm_fmt;
> +	u16 i2s_instance;
> +	u32 substream_type;
>   	void __iomem *acp3x_base;
>   	struct snd_pcm_substream *play_stream;
>   	struct snd_pcm_substream *capture_stream;
>