linux-kernel - Re: [PATCH 1/5] ASoC: mediatek: mt8188: separate ADDA playback dai from capture dai

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Date:   Wed, 17 May 2023 13:40:33 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Trevor Wu <trevor.wu@...iatek.com>, broonie@...nel.org,
        lgirdwood@...il.com, tiwai@...e.com, perex@...ex.cz,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, matthias.bgg@...il.com
Cc:     alsa-devel@...a-project.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/5] ASoC: mediatek: mt8188: separate ADDA playback dai
 from capture dai

Il 17/05/23 13:15, Trevor Wu ha scritto:
> MT8188 will support SOF. In SOF, be_hw_params_fixup callback are used to
> configure BE hardware parameters. However, playback and capture stream
> share the same callback function in which it can't know the stream type.
> 
> It's possible to require different paremters for playback and capture
> stream, so separate them into two dais for SOF usage.
> 
> Signed-off-by: Trevor Wu <trevor.wu@...iatek.com>
> ---
>   sound/soc/mediatek/mt8188/mt8188-afe-common.h |  3 +-
>   sound/soc/mediatek/mt8188/mt8188-dai-adda.c   | 76 ++++++++++---------
>   sound/soc/mediatek/mt8188/mt8188-mt6359.c     | 34 +++++++--
>   3 files changed, 68 insertions(+), 45 deletions(-)
> 
> diff --git a/sound/soc/mediatek/mt8188/mt8188-afe-common.h b/sound/soc/mediatek/mt8188/mt8188-afe-common.h
> index eb7e57c239bd..1304d685a306 100644
> --- a/sound/soc/mediatek/mt8188/mt8188-afe-common.h
> +++ b/sound/soc/mediatek/mt8188/mt8188-afe-common.h
> @@ -39,7 +39,7 @@ enum {
>   	MT8188_AFE_MEMIF_END,
>   	MT8188_AFE_MEMIF_NUM = (MT8188_AFE_MEMIF_END - MT8188_AFE_MEMIF_START),
>   	MT8188_AFE_IO_START = MT8188_AFE_MEMIF_END,
> -	MT8188_AFE_IO_ADDA = MT8188_AFE_IO_START,
> +	MT8188_AFE_IO_DL_SRC = MT8188_AFE_IO_START,
>   	MT8188_AFE_IO_DMIC_IN,
>   	MT8188_AFE_IO_DPTX,
>   	MT8188_AFE_IO_ETDM_START,
> @@ -52,6 +52,7 @@ enum {
>   	MT8188_AFE_IO_ETDM_NUM =
>   		(MT8188_AFE_IO_ETDM_END - MT8188_AFE_IO_ETDM_START),
>   	MT8188_AFE_IO_PCM = MT8188_AFE_IO_ETDM_END,
> +	MT8188_AFE_IO_UL_SRC,
>   	MT8188_AFE_IO_END,
>   	MT8188_AFE_IO_NUM = (MT8188_AFE_IO_END - MT8188_AFE_IO_START),
>   	MT8188_DAI_END = MT8188_AFE_IO_END,
> diff --git a/sound/soc/mediatek/mt8188/mt8188-dai-adda.c b/sound/soc/mediatek/mt8188/mt8188-dai-adda.c
> index fed9f927e623..9a6673a6f28a 100644
> --- a/sound/soc/mediatek/mt8188/mt8188-dai-adda.c
> +++ b/sound/soc/mediatek/mt8188/mt8188-dai-adda.c
> @@ -53,8 +53,7 @@ enum {
>   };
>   
>   struct mtk_dai_adda_priv {
> -	unsigned int dl_rate;
> -	unsigned int ul_rate;
> +	bool hires_required;
>   };
>   
>   static unsigned int afe_adda_dl_rate_transform(struct mtk_base_afe *afe,

..snip..

> @@ -503,13 +495,15 @@ static int mtk_dai_adda_hw_params(struct snd_pcm_substream *substream,
>   	dev_dbg(afe->dev, "%s(), id %d, stream %d, rate %u\n",
>   		__func__, id, substream->stream, rate);
>   
> -	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> -		adda_priv->dl_rate = rate;
> +	if (rate > ADDA_HIRES_THRES)
> +		adda_priv->hires_required = 1;
> +	else
> +		adda_priv->hires_required = 0;
> +

hires_required is a boolean, so assigning 1 or 0 should be replaced with
assigning true or false; regardless of that, what about...

	adda_priv->hires_required = (rate > ADDA_HIRES_THRES);

> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
>   		ret = mtk_dai_da_configure(afe, rate, id);
> -	} else {
> -		adda_priv->ul_rate = rate;
> +	else
>   		ret = mtk_dai_ad_configure(afe, rate, id);
> -	}
>   
>   	return ret;
>   }

Regards,
Angelo