linux-kernel - Re: [PATCH 6/8] ASoC: simple-card: add tdm slot supports

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Date:	Wed, 22 Jan 2014 22:11:21 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Xiubo Li <Li.Xiubo@...escale.com>
cc:	lgirdwood@...il.com, broonie@...nel.org, shawn.guo@...aro.org,
	kuninori.morimoto.gx@...esas.com, moinejf@...e.fr,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/8] ASoC: simple-card: add tdm slot supports

On Thu, 23 Jan 2014, Xiubo Li wrote:

> diff --git a/include/sound/simple_card.h b/include/sound/simple_card.h
> index e1ac996..cfc5b66 100644
> --- a/include/sound/simple_card.h
> +++ b/include/sound/simple_card.h
> @@ -14,10 +14,18 @@
>  
>  #include <sound/soc.h>
>  
> +struct asoc_simple_tdm_slot {
> +	unsigned int tx_mask;
> +	unsigned int rx_mask;
> +	int slots;
> +	int slot_width;
> +};
> +
>  struct asoc_simple_dai {
>  	const char *name;
>  	unsigned int fmt;
>  	unsigned int sysclk;
> +	struct asoc_simple_tdm_slot *tdm;
>  };
>  
>  struct asoc_simple_card_info {
> diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
> index 546b93d..d067e0a 100644
> --- a/sound/soc/generic/simple-card.c
> +++ b/sound/soc/generic/simple-card.c
> @@ -32,7 +32,7 @@ static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
>  		ret = snd_soc_dai_set_fmt(dai, set->fmt);
>  		if (ret && ret != -ENOTSUPP) {
>  			dev_err(dai->dev, "simple-card: set_fmt error\n");
> -			return ret;
> +			goto err;
>  		}
>  	}
>  
> @@ -40,10 +40,22 @@ static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
>  		ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
>  		if (ret && ret != -ENOTSUPP) {
>  			dev_err(dai->dev, "simple-card: set_sysclk error\n");
> -			return ret;
> +			goto err;
> +		}
> +	}
> +
> +	if (set->tdm) {
> +		ret = snd_soc_dai_set_tdm_slot(dai, set->tdm->tx_mask,
> +						set->tdm->rx_mask,
> +						set->tdm->slots,
> +						set->tdm->slot_width);
> +		if (ret && ret != -ENOTSUPP) {
> +			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
> +			goto err;
>  		}
>  	}
>  
> +err:
>  	return ret;
>  }
>  
> @@ -67,11 +79,43 @@ static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
>  }
>  
>  static int
> +asoc_simple_card_of_parse_tdm_slot(struct device_node *np,
> +				   struct device *dev,
> +				   struct asoc_simple_dai *dai,
> +				   const char *propname)
> +{
> +	struct asoc_simple_tdm_slot *tdm;
> +	u32 out_value[4];
> +	int ret;
> +
> +	if (!of_property_read_bool(np, propname))
> +		return 0;
> +
> +	tdm = devm_kzalloc(dev, sizeof(*tdm), GFP_KERNEL);
> +	if (!tdm)
> +		return -ENOMEM;
> +
> +	ret = of_property_read_u32_array(np, propname, out_value, 4);
> +	if (ret)
> +		return ret;

Looks like a memory leak?

> +
> +	tdm->tx_mask = out_value[0];
> +	tdm->rx_mask = out_value[1];
> +	tdm->slots = out_value[2];
> +	tdm->slot_width = out_value[3];
> +
> +	dai->tdm = tdm;
> +
> +	return 0;
> +}
> +
> +static int
>  asoc_simple_card_sub_parse_of(struct device_node *np,
>  			      unsigned int daifmt,
>  			      struct asoc_simple_dai *dai,
>  			      const struct device_node **p_node,
> -			      const char **name)
> +			      const char **name,
> +			      struct device *dev)
>  {
>  	struct device_node *node;
>  	struct clk *clk;
> @@ -91,6 +135,11 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
>  	if (ret < 0)
>  		goto parse_error;
>  
> +	/* parse tdm_slot */
> +	ret = asoc_simple_card_of_parse_tdm_slot(np, dev, dai, "tdm-slot");
> +	if (ret < 0)
> +		goto parse_error;
> +
>  	/*
>  	 * bitclock-inversion, frame-inversion
>  	 * bitclock-master,    frame-master
> @@ -162,7 +211,8 @@ static int asoc_simple_card_parse_of(struct device_node *node,
>  		ret = asoc_simple_card_sub_parse_of(np, priv->daifmt,
>  						  &priv->cpu_dai,
>  						  &dai_link->cpu_of_node,
> -						  &dai_link->cpu_dai_name);
> +						  &dai_link->cpu_dai_name,
> +						  dev);
>  	if (ret < 0)
>  		return ret;
>  
> @@ -173,7 +223,8 @@ static int asoc_simple_card_parse_of(struct device_node *node,
>  		ret = asoc_simple_card_sub_parse_of(np, priv->daifmt,
>  						  &priv->codec_dai,
>  						  &dai_link->codec_of_node,
> -						  &dai_link->codec_dai_name);
> +						  &dai_link->codec_dai_name,
> +						  dev);
>  	if (ret < 0)
>  		return ret;
>  
--
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