linux-kernel - Re: [PATCH v2] ASoC: Intel: cirrus-common: fix incorrect channel mapping

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Message-ID: <53e13af2-d279-372c-0b5b-fdf3277e0231@linux.intel.com>
Date:   Thu, 2 Jun 2022 09:13:52 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Brent Lu <brent.lu@...el.com>, alsa-devel@...a-project.org
Cc:     Cezary Rojewski <cezary.rojewski@...el.com>,
        linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>, xliu <xiang.liu@...rus.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>
Subject: Re: [PATCH v2] ASoC: Intel: cirrus-common: fix incorrect channel
 mapping



On 6/2/22 00:19, Brent Lu wrote:
> From: xliu <xiang.liu@...rus.com>
> 
> The default mapping of ASPRX1 (DAC source) is slot 0. Change the slot
> mapping of right amplifiers (WR and TR) to slot 1 to receive right
> channel data. Also update the ACPI instance ID mapping according to HW
> configuration.
> 
> Signed-off-by: xliu <xiang.liu@...rus.com>
> Signed-off-by: Brent Lu <brent.lu@...el.com>

This v2 looks much better and self-explanatory. Thanks!

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

> ---
>  sound/soc/intel/boards/sof_cirrus_common.c | 40 +++++++++++++++++++---
>  1 file changed, 36 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/soc/intel/boards/sof_cirrus_common.c b/sound/soc/intel/boards/sof_cirrus_common.c
> index e71d74ec1b0b..f4192df962d6 100644
> --- a/sound/soc/intel/boards/sof_cirrus_common.c
> +++ b/sound/soc/intel/boards/sof_cirrus_common.c
> @@ -54,22 +54,29 @@ static struct snd_soc_dai_link_component cs35l41_components[] = {
>  	},
>  };
>  
> +/*
> + * Mapping between ACPI instance id and speaker position.
> + *
> + * Four speakers:
> + *         0: Tweeter left, 1: Woofer left
> + *         2: Tweeter right, 3: Woofer right
> + */
>  static struct snd_soc_codec_conf cs35l41_codec_conf[] = {
>  	{
>  		.dlc = COMP_CODEC_CONF(CS35L41_DEV0_NAME),
> -		.name_prefix = "WL",
> +		.name_prefix = "TL",
>  	},
>  	{
>  		.dlc = COMP_CODEC_CONF(CS35L41_DEV1_NAME),
> -		.name_prefix = "WR",
> +		.name_prefix = "WL",
>  	},
>  	{
>  		.dlc = COMP_CODEC_CONF(CS35L41_DEV2_NAME),
> -		.name_prefix = "TL",
> +		.name_prefix = "TR",
>  	},
>  	{
>  		.dlc = COMP_CODEC_CONF(CS35L41_DEV3_NAME),
> -		.name_prefix = "TR",
> +		.name_prefix = "WR",
>  	},
>  };
>  
> @@ -101,6 +108,21 @@ static int cs35l41_init(struct snd_soc_pcm_runtime *rtd)
>  	return ret;
>  }
>  
> +/*
> + * Channel map:
> + *
> + * TL/WL: ASPRX1 on slot 0, ASPRX2 on slot 1 (default)
> + * TR/WR: ASPRX1 on slot 1, ASPRX2 on slot 0
> + */
> +static const struct {
> +	unsigned int rx[2];
> +} cs35l41_channel_map[] = {
> +	{.rx = {0, 1}}, /* TL */
> +	{.rx = {0, 1}}, /* WL */
> +	{.rx = {1, 0}}, /* TR */
> +	{.rx = {1, 0}}, /* WR */
> +};
> +
>  static int cs35l41_hw_params(struct snd_pcm_substream *substream,
>  			     struct snd_pcm_hw_params *params)
>  {
> @@ -134,6 +156,16 @@ static int cs35l41_hw_params(struct snd_pcm_substream *substream,
>  				ret);
>  			return ret;
>  		}
> +
> +		/* setup channel map */
> +		ret = snd_soc_dai_set_channel_map(codec_dai, 0, NULL,
> +						  ARRAY_SIZE(cs35l41_channel_map[i].rx),
> +						  (unsigned int *)cs35l41_channel_map[i].rx);
> +		if (ret < 0) {
> +			dev_err(codec_dai->dev, "fail to set channel map, ret %d\n",
> +				ret);
> +			return ret;
> +		}
>  	}
>  
>  	return 0;