Re: [PATCH v2 1/2] ASoC: Intel: maxim-common: get codec number from ACPI

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

On 7/26/23 4:08 PM, Brent Lu wrote:
> Implement a helper function to get number of codecs from ACPI
> subsystem to remove the need of quirk flag in machine driver.
> 
> Signed-off-by: Brent Lu <brent.lu@intel.com>
> ---
>   sound/soc/intel/boards/sof_maxim_common.c | 171 +++++++++++++---------
>   sound/soc/intel/boards/sof_maxim_common.h |  21 ++-
>   2 files changed, 110 insertions(+), 82 deletions(-)
> 
> diff --git a/sound/soc/intel/boards/sof_maxim_common.c b/sound/soc/intel/boards/sof_maxim_common.c
> index 112e89951da0..1fdd66f5adc2 100644
> --- a/sound/soc/intel/boards/sof_maxim_common.c
> +++ b/sound/soc/intel/boards/sof_maxim_common.c
> @@ -4,6 +4,7 @@
>   #include <linux/module.h>
>   #include <linux/string.h>
>   #include <sound/pcm.h>
> +#include <sound/pcm_params.h>
>   #include <sound/soc.h>
>   #include <sound/soc-acpi.h>
>   #include <sound/soc-dai.h>
> @@ -11,6 +12,18 @@
>   #include <uapi/sound/asound.h>
>   #include "sof_maxim_common.h"
>   
> +/* helper function to get the number of specific codec */
> +static unsigned int get_num_codecs(const char *hid)
> +{
> +	struct acpi_device *adev;
> +	unsigned int dev_num = 0;
> +
> +	for_each_acpi_dev_match(adev, hid, NULL, -1)
> +		dev_num++;
> +
> +	return dev_num;
> +}
> +
>   #define MAX_98373_PIN_NAME 16
>   
>   const struct snd_soc_dapm_route max_98373_dapm_routes[] = {
> @@ -168,17 +181,6 @@ static struct snd_soc_codec_conf max_98390_codec_conf[] = {
>   		.dlc = COMP_CODEC_CONF(MAX_98390_DEV1_NAME),
>   		.name_prefix = "Left",
>   	},
> -};
> -
> -static struct snd_soc_codec_conf max_98390_4spk_codec_conf[] = {
> -	{
> -		.dlc = COMP_CODEC_CONF(MAX_98390_DEV0_NAME),
> -		.name_prefix = "Right",
> -	},
> -	{
> -		.dlc = COMP_CODEC_CONF(MAX_98390_DEV1_NAME),
> -		.name_prefix = "Left",
> -	},

if you remove the codec conf, doesn't this impact the Kcontrols names? 
Does this break existing UCM files?

It's rather hard to review with just the diff.

>   	{
>   		.dlc = COMP_CODEC_CONF(MAX_98390_DEV2_NAME),
>   		.name_prefix = "Tweeter Right",
> @@ -189,19 +191,7 @@ static struct snd_soc_codec_conf max_98390_4spk_codec_conf[] = {
>   	},
>   };
>   
> -struct snd_soc_dai_link_component max_98390_components[] = {
> -	{
> -		.name = MAX_98390_DEV0_NAME,
> -		.dai_name = MAX_98390_CODEC_DAI,
> -	},
> -	{
> -		.name = MAX_98390_DEV1_NAME,
> -		.dai_name = MAX_98390_CODEC_DAI,
> -	},
> -};
> -EXPORT_SYMBOL_NS(max_98390_components, SND_SOC_INTEL_SOF_MAXIM_COMMON);
> -
> -struct snd_soc_dai_link_component max_98390_4spk_components[] = {
> +static struct snd_soc_dai_link_component max_98390_components[] = {
>   	{
>   		.name = MAX_98390_DEV0_NAME,
>   		.dai_name = MAX_98390_CODEC_DAI,
> @@ -219,62 +209,56 @@ struct snd_soc_dai_link_component max_98390_4spk_components[] = {
>   		.dai_name = MAX_98390_CODEC_DAI,
>   	},
>   };
> -EXPORT_SYMBOL_NS(max_98390_4spk_components, SND_SOC_INTEL_SOF_MAXIM_COMMON);
> +
> +static const struct {
> +	unsigned int tx;
> +	unsigned int rx;
> +} max_98390_tdm_mask[] = {
> +	{.tx = 0x01, .rx = 0x3},
> +	{.tx = 0x02, .rx = 0x3},
> +	{.tx = 0x04, .rx = 0x3},
> +	{.tx = 0x08, .rx = 0x3},
> +};
>   
>   static int max_98390_hw_params(struct snd_pcm_substream *substream,
>   			       struct snd_pcm_hw_params *params)
>   {
>   	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
>   	struct snd_soc_dai *codec_dai;
> -	int i;
> +	int i, ret = 0;
>   
>   	for_each_rtd_codec_dais(rtd, i, codec_dai) {
> -		if (i >= ARRAY_SIZE(max_98390_4spk_components)) {
> +		if (i >= ARRAY_SIZE(max_98390_tdm_mask)) {
>   			dev_err(codec_dai->dev, "invalid codec index %d\n", i);
>   			return -ENODEV;
>   		}
>   
> -		if (!strcmp(codec_dai->component->name, MAX_98390_DEV0_NAME)) {
> -			/* DEV0 tdm slot configuration Right */
> -			snd_soc_dai_set_tdm_slot(codec_dai, 0x01, 3, 4, 32);
> -		}
> -		if (!strcmp(codec_dai->component->name, MAX_98390_DEV1_NAME)) {
> -			/* DEV1 tdm slot configuration Left */
> -			snd_soc_dai_set_tdm_slot(codec_dai, 0x02, 3, 4, 32);
> -		}
> -
> -		if (!strcmp(codec_dai->component->name, MAX_98390_DEV2_NAME)) {
> -			/* DEVi2 tdm slot configuration Tweeter Right */
> -			snd_soc_dai_set_tdm_slot(codec_dai, 0x04, 3, 4, 32);
> -		}
> -		if (!strcmp(codec_dai->component->name, MAX_98390_DEV3_NAME)) {
> -			/* DEV3 tdm slot configuration Tweeter Left */
> -			snd_soc_dai_set_tdm_slot(codec_dai, 0x08, 3, 4, 32);
> +		ret = snd_soc_dai_set_tdm_slot(codec_dai, max_98390_tdm_mask[i].tx,
> +					       max_98390_tdm_mask[i].rx, 4,
> +					       params_width(params));
> +		if (ret < 0) {
> +			dev_err(codec_dai->dev, "fail to set tdm slot, ret %d\n",
> +				ret);
> +			return ret;
>   		}
>   	}
>   	return 0;
>   }
>   
> -int max_98390_spk_codec_init(struct snd_soc_pcm_runtime *rtd)
> +static int max_98390_init(struct snd_soc_pcm_runtime *rtd)
>   {
>   	struct snd_soc_card *card = rtd->card;
> +	unsigned int num_codecs = get_num_codecs(MAX_98390_ACPI_HID);
>   	int ret;
>   
> -	/* add regular speakers dapm route */
> -	ret = snd_soc_dapm_add_routes(&card->dapm, max_98390_dapm_routes,
> -				      ARRAY_SIZE(max_98390_dapm_routes));
> -	if (ret) {
> -		dev_err(rtd->dev, "unable to add Left/Right Speaker dapm, ret %d\n", ret);
> -		return ret;
> -	}
> -
> -	/* add widgets/controls/dapm for tweeter speakers */
> -	if (acpi_dev_present("MX98390", "3", -1)) {
> +	switch (num_codecs) {
> +	case 4:
> +		/* add widgets/controls/dapm for tweeter speakers */
>   		ret = snd_soc_dapm_new_controls(&card->dapm, max_98390_tt_dapm_widgets,
>   						ARRAY_SIZE(max_98390_tt_dapm_widgets));
> -
>   		if (ret) {
> -			dev_err(rtd->dev, "unable to add tweeter dapm controls, ret %d\n", ret);
> +			dev_err(rtd->dev, "unable to add tweeter dapm widgets, ret %d\n",
> +				ret);
>   			/* Don't need to add routes if widget addition failed */
>   			return ret;
>   		}
> @@ -282,33 +266,80 @@ int max_98390_spk_codec_init(struct snd_soc_pcm_runtime *rtd)
>   		ret = snd_soc_add_card_controls(card, max_98390_tt_kcontrols,
>   						ARRAY_SIZE(max_98390_tt_kcontrols));
>   		if (ret) {
> -			dev_err(rtd->dev, "unable to add tweeter card controls, ret %d\n", ret);
> +			dev_err(rtd->dev, "unable to add tweeter controls, ret %d\n",
> +				ret);
>   			return ret;
>   		}
>   
>   		ret = snd_soc_dapm_add_routes(&card->dapm, max_98390_tt_dapm_routes,
>   					      ARRAY_SIZE(max_98390_tt_dapm_routes));
> -		if (ret)
> -			dev_err(rtd->dev,
> -				"unable to add Tweeter Left/Right Speaker dapm, ret %d\n", ret);
> +		if (ret) {
> +			dev_err(rtd->dev, "unable to add tweeter dapm routes, ret %d\n",
> +				ret);
> +			return ret;
> +		}
> +
> +		fallthrough;
> +	case 2:
> +		/* add regular speakers dapm route */
> +		ret = snd_soc_dapm_add_routes(&card->dapm, max_98390_dapm_routes,
> +					      ARRAY_SIZE(max_98390_dapm_routes));
> +		if (ret) {
> +			dev_err(rtd->dev, "unable to add dapm routes, ret %d\n",
> +				ret);
> +			return ret;
> +		}
> +		break;
> +	default:
> +		dev_err(rtd->dev, "invalid codec number %d\n", num_codecs);
> +		ret = -EINVAL;
> +		break;
>   	}
> +
>   	return ret;
>   }
> -EXPORT_SYMBOL_NS(max_98390_spk_codec_init, SND_SOC_INTEL_SOF_MAXIM_COMMON);
>   
> -const struct snd_soc_ops max_98390_ops = {
> +static const struct snd_soc_ops max_98390_ops = {
>   	.hw_params = max_98390_hw_params,
>   };
> -EXPORT_SYMBOL_NS(max_98390_ops, SND_SOC_INTEL_SOF_MAXIM_COMMON);
>   
> -void max_98390_set_codec_conf(struct snd_soc_card *card, int ch)
> +void max_98390_dai_link(struct snd_soc_dai_link *link)
> +{
> +	unsigned int num_codecs = get_num_codecs(MAX_98390_ACPI_HID);
> +
> +	link->codecs = max_98390_components;
> +
> +	switch (num_codecs) {
> +	case 2:
> +	case 4:
> +		link->num_codecs = num_codecs;
> +		break;
> +	default:
> +		pr_err("invalid codec number %d for %s\n", num_codecs,
> +			MAX_98390_ACPI_HID);
> +		break;
> +	}
> +
> +	link->init = max_98390_init;
> +	link->ops = &max_98390_ops;
> +}
> +EXPORT_SYMBOL_NS(max_98390_dai_link, SND_SOC_INTEL_SOF_MAXIM_COMMON);
> +
> +void max_98390_set_codec_conf(struct snd_soc_card *card)
>   {
> -	if (ch == ARRAY_SIZE(max_98390_4spk_codec_conf)) {
> -		card->codec_conf = max_98390_4spk_codec_conf;
> -		card->num_configs = ARRAY_SIZE(max_98390_4spk_codec_conf);
> -	} else {
> -		card->codec_conf = max_98390_codec_conf;
> -		card->num_configs = ARRAY_SIZE(max_98390_codec_conf);
> +	unsigned int num_codecs = get_num_codecs(MAX_98390_ACPI_HID);
> +
> +	card->codec_conf = max_98390_codec_conf;
> +
> +	switch (num_codecs) {
> +	case 2:
> +	case 4:
> +		card->num_configs = num_codecs;
> +		break;
> +	default:
> +		pr_err("invalid codec number %d for %s\n", num_codecs,
> +			MAX_98390_ACPI_HID);
> +		break;
>   	}
>   }
>   EXPORT_SYMBOL_NS(max_98390_set_codec_conf, SND_SOC_INTEL_SOF_MAXIM_COMMON);
> diff --git a/sound/soc/intel/boards/sof_maxim_common.h b/sound/soc/intel/boards/sof_maxim_common.h
> index 7a8c53049e4d..a3676d68cc12 100644
> --- a/sound/soc/intel/boards/sof_maxim_common.h
> +++ b/sound/soc/intel/boards/sof_maxim_common.h
> @@ -27,18 +27,15 @@ int max_98373_trigger(struct snd_pcm_substream *substream, int cmd);
>   /*
>    * Maxim MAX98390
>    */
> -#define MAX_98390_CODEC_DAI     "max98390-aif1"
> -#define MAX_98390_DEV0_NAME     "i2c-MX98390:00"
> -#define MAX_98390_DEV1_NAME     "i2c-MX98390:01"
> -#define MAX_98390_DEV2_NAME     "i2c-MX98390:02"
> -#define MAX_98390_DEV3_NAME     "i2c-MX98390:03"
> -
> -extern struct snd_soc_dai_link_component max_98390_components[2];
> -extern struct snd_soc_dai_link_component max_98390_4spk_components[4];
> -extern const struct snd_soc_ops max_98390_ops;
> -
> -void max_98390_set_codec_conf(struct snd_soc_card *card, int ch);
> -int max_98390_spk_codec_init(struct snd_soc_pcm_runtime *rtd);
> +#define MAX_98390_ACPI_HID	"MX98390"
> +#define MAX_98390_CODEC_DAI	"max98390-aif1"
> +#define MAX_98390_DEV0_NAME	"i2c-MX98390:00"
> +#define MAX_98390_DEV1_NAME	"i2c-MX98390:01"
> +#define MAX_98390_DEV2_NAME	"i2c-MX98390:02"
> +#define MAX_98390_DEV3_NAME	"i2c-MX98390:03"
> +
> +void max_98390_dai_link(struct snd_soc_dai_link *link);
> +void max_98390_set_codec_conf(struct snd_soc_card *card);
>   
>   /*
>    * Maxim MAX98357A/MAX98360A