linux-kernel - Re: [PATCH v2] ASoc: tas2781: Playback can work when only RCA binary loading without dsp firmware loading

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Message-ID: <6a8ab4f6-63be-4284-814a-d853faf000b5@linux.intel.com>
Date: Mon, 27 May 2024 08:44:06 -0500
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Shenghao Ding <shenghao-ding@...com>, broonie@...nel.org
Cc: andriy.shevchenko@...ux.intel.com, lgirdwood@...il.com, perex@...ex.cz,
 13916275206@....com, alsa-devel@...a-project.org, i-salazar@...com,
 linux-kernel@...r.kernel.org, j-chadha@...com, liam.r.girdwood@...el.com,
 jaden-yue@...com, yung-chuan.liao@...ux.intel.com, dipa@...com,
 kevin-lu@...com, yuhsuan@...gle.com, tiwai@...e.de, baojun.xu@...com,
 soyer@....hu, Baojun.Xu@....com, judyhsiao@...gle.com, navada@...com,
 cujomalainey@...gle.com, aanya@...com, nayeem.mahmud@...com
Subject: Re: [PATCH v2] ASoc: tas2781: Playback can work when only RCA binary
 loading without dsp firmware loading



On 5/24/24 20:47, Shenghao Ding wrote:
> In only RCA binary loading case, only default dsp program inside the
> chip will be work.

What does 'RCA' stand for?

Also clarify the commit title without double negatives, e.g.

"Enable RCA-based playback without DSP firmware download"
> -	if (tas_priv->fw_state == TASDEVICE_DSP_FW_FAIL) {
> -		dev_err(tas_priv->dev, "DSP bin file not loaded\n");
> +	/*
> +	 * Only RCA file loaded can still work with default dsp program inside
> +	 * the chip?

reword the commit and remove question mark.

> +	 */
> +	if (!(tas_priv->fw_state == TASDEVICE_RCA_FW_OK ||
> +		tas_priv->fw_state == TASDEVICE_DSP_FW_ALL_OK)) {
> +		dev_err(tas_priv->dev, "No firmware loaded\n");
>  		return;
>  	}
>  
>  	if (state == 0) {
> -		if (tas_priv->cur_prog < tas_fmw->nr_programs) {
> +		if (tas_fmw && tas_priv->cur_prog < tas_fmw->nr_programs) {
>  			/*dsp mode or tuning mode*/

spaces in comments

>  			profile_cfg_id = tas_priv->rcabin.profile_cfg_id;
>  			tasdevice_select_tuningprm_cfg(tas_priv,
> @@ -2340,9 +2345,10 @@ void tasdevice_tuning_switch(void *context, int state)
>  
>  		tasdevice_select_cfg_blk(tas_priv, profile_cfg_id,
>  			TASDEVICE_BIN_BLK_PRE_POWER_UP);
> -	} else
> +	} else {
>  		tasdevice_select_cfg_blk(tas_priv, profile_cfg_id,
>  			TASDEVICE_BIN_BLK_PRE_SHUTDOWN);
> +	}
>  }
>  EXPORT_SYMBOL_NS_GPL(tasdevice_tuning_switch,
>  	SND_SOC_TAS2781_FMWLIB);
> diff --git a/sound/soc/codecs/tas2781-i2c.c b/sound/soc/codecs/tas2781-i2c.c
> index 9350972dfefe..ccb9313ada9b 100644
> --- a/sound/soc/codecs/tas2781-i2c.c
> +++ b/sound/soc/codecs/tas2781-i2c.c
> @@ -380,23 +380,30 @@ static void tasdevice_fw_ready(const struct firmware *fmw,
>  	mutex_lock(&tas_priv->codec_lock);
>  
>  	ret = tasdevice_rca_parser(tas_priv, fmw);
> -	if (ret)
> +	if (ret) {
> +		tasdevice_config_info_remove(tas_priv);
>  		goto out;
> +	}
>  	tasdevice_create_control(tas_priv);
>  
>  	tasdevice_dsp_remove(tas_priv);
>  	tasdevice_calbin_remove(tas_priv);
> -	tas_priv->fw_state = TASDEVICE_DSP_FW_PENDING;
> +	tas_priv->fw_state = TASDEVICE_RCA_FW_OK;
>  	scnprintf(tas_priv->coef_binaryname, 64, "%s_coef.bin",
>  		tas_priv->dev_name);
> +
>  	ret = tasdevice_dsp_parser(tas_priv);
>  	if (ret) {
>  		dev_err(tas_priv->dev, "dspfw load %s error\n",
>  			tas_priv->coef_binaryname);
> -		tas_priv->fw_state = TASDEVICE_DSP_FW_FAIL;
>  		goto out;
>  	}
> -	tasdevice_dsp_create_ctrls(tas_priv);
> +
> +	ret = tasdevice_dsp_create_ctrls(tas_priv);
> +	if (ret) {
> +		dev_err(tas_priv->dev, "dsp controls error\n");
> +		goto out;
> +	}

this seems unrelated to the boot process? Move to a different patch?

>  
>  	tas_priv->fw_state = TASDEVICE_DSP_FW_ALL_OK;
>  
> @@ -417,9 +424,8 @@ static void tasdevice_fw_ready(const struct firmware *fmw,
>  	tasdevice_prmg_load(tas_priv, 0);
>  	tas_priv->cur_prog = 0;
>  out:
> -	if (tas_priv->fw_state == TASDEVICE_DSP_FW_FAIL) {
> -		/*If DSP FW fail, kcontrol won't be created */
> -		tasdevice_config_info_remove(tas_priv);
> +	if (tas_priv->fw_state == TASDEVICE_RCA_FW_OK) {
> +		/*If DSP FW fail, DSP kcontrol won't be created */

It looks like you're no longer using PENDING and FAIL states?
The state machine is becoming really hard to follow.

>  		tasdevice_dsp_remove(tas_priv);
>  	}
>  	mutex_unlock(&tas_priv->codec_lock);
> @@ -466,14 +472,14 @@ static int tasdevice_startup(struct snd_pcm_substream *substream,
>  {
>  	struct snd_soc_component *codec = dai->component;
>  	struct tasdevice_priv *tas_priv = snd_soc_component_get_drvdata(codec);
> -	int ret = 0;
>  
> -	if (tas_priv->fw_state != TASDEVICE_DSP_FW_ALL_OK) {
> -		dev_err(tas_priv->dev, "DSP bin file not loaded\n");
> -		ret = -EINVAL;
> +	if (!(tas_priv->fw_state == TASDEVICE_DSP_FW_ALL_OK ||
> +		tas_priv->fw_state == TASDEVICE_RCA_FW_OK)) {
> +		dev_err(tas_priv->dev, "Bin file not loaded\n");
> +		return -EINVAL;
>  	}
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static int tasdevice_hw_params(struct snd_pcm_substream *substream,