Re: [RESEND PATCH v5 5/5] ASoC: fsl_easrc: expose individual DAIs per conversion path

[Frank Li]

On Tue, Sep 22, 2026 at 11:34:28AM +0800, shengjiu.wang@xxxxxxxxxxx wrote:
> From: Shengjiu Wang <shengjiu.wang@xxxxxxx>
>
> The i.MX EASRC hardware supports four independent conversion contexts
> (A, B, C, D). The driver previously registered a single DAI with generic
> stream names "ASRC-Playback" and "ASRC-Capture", which prevents
> multiple independent conversion paths from being used simultaneously.
>
> Replace the single fsl_easrc_dai instance with an array of four DAI
> drivers to allow up to four independent conversion paths to be active
> at the same time:
>
>   easrc-0 -- ASRC-Playback / ASRC-Capture (backward compatible)
>   easrc-1 -- ASRC1-Playback / ASRC1-Capture
>   easrc-2 -- ASRC2-Playback / ASRC2-Capture
>   easrc-3 -- ASRC3-Playback / ASRC3-Capture
>
> easrc-0 retains the original generic stream names to preserve backward
> compatibility with existing machine drivers and board configurations.
> Each DAI retains the same channel, rate and format capabilities as the
> original, including IEC958 subframe support on the capture side. Update
> the devm_snd_soc_register_component() call to register all four DAIs.
>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
> ---

Reviewed-by: Frank Li <Frank.Li@xxxxxxx>

>  sound/soc/fsl/fsl_easrc.c | 112 +++++++++++++++++++++++++++++++-------
>  1 file changed, 92 insertions(+), 20 deletions(-)
>
> diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c
> index a6ac94055b17..cd22ea3e03bc 100644
> --- a/sound/soc/fsl/fsl_easrc.c
> +++ b/sound/soc/fsl/fsl_easrc.c
> @@ -1589,27 +1589,99 @@ static const struct snd_soc_dai_ops fsl_easrc_dai_ops = {
>  	.hw_free	= fsl_easrc_hw_free,
>  };
>
> -static struct snd_soc_dai_driver fsl_easrc_dai = {
> -	.playback = {
> -		.stream_name = "ASRC-Playback",
> -		.channels_min = 1,
> -		.channels_max = 32,
> -		.rate_min = 8000,
> -		.rate_max = 768000,
> -		.rates = SNDRV_PCM_RATE_KNOT,
> -		.formats = FSL_EASRC_FORMATS,
> +static struct snd_soc_dai_driver fsl_easrc_dai[] = {
> +	{
> +		.name = "easrc-0",
> +		.playback = {
> +			.stream_name = "ASRC-Playback",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS,
> +		},
> +		.capture = {
> +			.stream_name = "ASRC-Capture",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS |
> +				   SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
> +		},
> +		.ops = &fsl_easrc_dai_ops,
>  	},
> -	.capture = {
> -		.stream_name = "ASRC-Capture",
> -		.channels_min = 1,
> -		.channels_max = 32,
> -		.rate_min = 8000,
> -		.rate_max = 768000,
> -		.rates = SNDRV_PCM_RATE_KNOT,
> -		.formats = FSL_EASRC_FORMATS |
> -			   SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
> +	{
> +		.name = "easrc-1",
> +		.playback = {
> +			.stream_name = "ASRC1-Playback",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS,
> +		},
> +		.capture = {
> +			.stream_name = "ASRC1-Capture",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS |
> +				   SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
> +		},
> +		.ops = &fsl_easrc_dai_ops,
> +	},
> +	{
> +		.name = "easrc-2",
> +		.playback = {
> +			.stream_name = "ASRC2-Playback",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS,
> +		},
> +		.capture = {
> +			.stream_name = "ASRC2-Capture",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS |
> +				   SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
> +		},
> +		.ops = &fsl_easrc_dai_ops,
> +	},
> +	{
> +		.name = "easrc-3",
> +		.playback = {
> +			.stream_name = "ASRC3-Playback",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS,
> +		},
> +		.capture = {
> +			.stream_name = "ASRC3-Capture",
> +			.channels_min = 1,
> +			.channels_max = 32,
> +			.rate_min = 8000,
> +			.rate_max = 768000,
> +			.rates = SNDRV_PCM_RATE_KNOT,
> +			.formats = FSL_EASRC_FORMATS |
> +				   SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
> +		},
> +		.ops = &fsl_easrc_dai_ops,
>  	},
> -	.ops = &fsl_easrc_dai_ops,
>  };
>
>  static const struct snd_soc_component_driver fsl_easrc_component = {
> @@ -2234,7 +2306,7 @@ static int fsl_easrc_probe(struct platform_device *pdev)
>  	regcache_cache_only(easrc->regmap, true);
>
>  	ret = devm_snd_soc_register_component(dev, &fsl_easrc_component,
> -					      &fsl_easrc_dai, 1);
> +					      fsl_easrc_dai, ARRAY_SIZE(fsl_easrc_dai));
>  	if (ret) {
>  		dev_err(dev, "failed to register ASoC DAI\n");
>  		goto err_pm_disable;
> --
> 2.34.1
>
>