[17/22] ASoC: samsung: odroid: Add support for secondary CPU DAI
diff mbox series

Message ID 20190207170028.720-18-s.nawrocki@samsung.com
State New
Headers show
Series
  • [01/22] ASoC: dmaengine: Improve of_node test in dmaengine_pcm_request_chan_of()
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Commit Message

Sylwester Nawrocki Feb. 7, 2019, 5 p.m. UTC
This patch adds DPCM links in order to support the secondary I2S interface.
For the secondary PCM interface to be actually available one more entry
should be added to the sound-dai property in sound/cpu node in DT.
The changes in driver are done in a way so we are backwards compatible with
existing DTS/DTB, i.e. if the cpu sound-dai property contains only one entry
only one PCM will be registered.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
 sound/soc/samsung/odroid.c | 132 +++++++++++++++++++++++++++----------
 1 file changed, 96 insertions(+), 36 deletions(-)

Comments

Krzysztof Kozlowski Feb. 11, 2019, 1:57 p.m. UTC | #1
On Thu, 7 Feb 2019 at 18:01, Sylwester Nawrocki <s.nawrocki@samsung.com> wrote:
>
> This patch adds DPCM links in order to support the secondary I2S interface.
> For the secondary PCM interface to be actually available one more entry
> should be added to the sound-dai property in sound/cpu node in DT.
> The changes in driver are done in a way so we are backwards compatible with
> existing DTS/DTB, i.e. if the cpu sound-dai property contains only one entry
> only one PCM will be registered.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> ---
>  sound/soc/samsung/odroid.c | 132 +++++++++++++++++++++++++++----------
>  1 file changed, 96 insertions(+), 36 deletions(-)
>
> diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c
> index e7b371b07230..bab61e8278a0 100644
> --- a/sound/soc/samsung/odroid.c
> +++ b/sound/soc/samsung/odroid.c
> @@ -7,6 +7,7 @@
>   */
>
>  #include <linux/clk.h>
> +#include <linux/clk-provider.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
>  #include <linux/module.h>
> @@ -17,21 +18,24 @@
>
>  struct odroid_priv {
>         struct snd_soc_card card;
> -       struct snd_soc_dai_link dai_link;
> -
>         struct clk *clk_i2s_bus;
>         struct clk *sclk_i2s;
>  };
>
> -static int odroid_card_startup(struct snd_pcm_substream *substream)
> +static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
>  {
>         struct snd_pcm_runtime *runtime = substream->runtime;
>
>         snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
> +
>         return 0;
>  }
>
> -static int odroid_card_hw_params(struct snd_pcm_substream *substream,
> +static const struct snd_soc_ops odroid_card_fe_ops = {
> +       .startup = odroid_card_fe_startup,
> +};
> +
> +static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
>                                       struct snd_pcm_hw_params *params)
>  {
>         struct snd_soc_pcm_runtime *rtd = substream->private_data;
> @@ -86,19 +90,56 @@ static int odroid_card_hw_params(struct snd_pcm_substream *substream,
>         return 0;
>  }
>
> -static const struct snd_soc_ops odroid_card_ops = {
> -       .startup = odroid_card_startup,
> -       .hw_params = odroid_card_hw_params,
> +static const struct snd_soc_ops odroid_card_be_ops = {
> +       .hw_params = odroid_card_be_hw_params,
> +};
> +
> +static struct snd_soc_dai_link odroid_card_dais[] = {
> +       {
> +               /* Primary FE <-> BE link */
> +               .codec_name = "snd-soc-dummy",
> +               .codec_dai_name = "snd-soc-dummy-dai",
> +               .ops = &odroid_card_fe_ops,
> +               .name = "Primary",
> +               .stream_name = "Primary",
> +               .platform_name = "3830000.i2s",

Why exposing address as platform_name? I think it is not used so how
about some friendlier name?

> +               .dynamic = 1,
> +               .dpcm_playback = 1,
> +       }, {
> +               /* BE <-> CODECs link */
> +               .name = "I2S Mixer",
> +               .cpu_name = "snd-soc-dummy",
> +               .cpu_dai_name = "snd-soc-dummy-dai",
> +               .platform_name = "snd-soc-dummy",
> +               .ops = &odroid_card_be_ops,
> +               .no_pcm = 1,
> +               .dpcm_playback = 1,
> +               .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> +                               SND_SOC_DAIFMT_CBS_CFS,
> +       }, {
> +               /* Secondary FE <-> BE link */
> +               .playback_only = 1,
> +               .codec_name = "snd-soc-dummy",
> +               .codec_dai_name = "snd-soc-dummy-dai",
> +               .ops = &odroid_card_fe_ops,
> +               .name = "Secondary",
> +               .stream_name = "Secondary",
> +               .platform_name = "samsung-i2s-sec",
> +               .dynamic = 1,
> +               .dpcm_playback = 1,
> +       }
>  };
>
> +

Unneeded new line.

Best regards,
Krzysztof
Sylwester Nawrocki Feb. 11, 2019, 3:19 p.m. UTC | #2
On 2/11/19 14:57, Krzysztof Kozlowski wrote:
>> static struct snd_soc_dai_link odroid_card_dais[] = {
>> +       {
>> +               /* Primary FE <-> BE link */
>> +               .codec_name = "snd-soc-dummy",
>> +               .codec_dai_name = "snd-soc-dummy-dai",
>> +               .ops = &odroid_card_fe_ops,
>> +               .name = "Primary",
>> +               .stream_name = "Primary",
>> +               .platform_name = "3830000.i2s",

> Why exposing address as platform_name? I think it is not used so how
> about some friendlier name?
 
This entry is for selecting "PCM" (DMA) component for the link. 
For proper matching we need to use names of devices for which
the dmaengine based PCM component is registered (with a call to
samsung_asoc_dma_platform_register()).

We can't use platform_of_node because 2 PCM components ("3830000.i2s", 
"samsung-i2s-sec") are now associated with same DT node.


>> +       }, {
>> +               /* BE <-> CODECs link */
>> +       }, {
>> +               /* Secondary FE <-> BE link */

>> +               .platform_name = "samsung-i2s-sec",

>> +       }
>>  };


--
Thanks, 
Sylwester
Krzysztof Kozlowski Feb. 11, 2019, 3:34 p.m. UTC | #3
On Mon, 11 Feb 2019 at 16:19, Sylwester Nawrocki <s.nawrocki@samsung.com> wrote:
>
> On 2/11/19 14:57, Krzysztof Kozlowski wrote:
> >> static struct snd_soc_dai_link odroid_card_dais[] = {
> >> +       {
> >> +               /* Primary FE <-> BE link */
> >> +               .codec_name = "snd-soc-dummy",
> >> +               .codec_dai_name = "snd-soc-dummy-dai",
> >> +               .ops = &odroid_card_fe_ops,
> >> +               .name = "Primary",
> >> +               .stream_name = "Primary",
> >> +               .platform_name = "3830000.i2s",
>
> > Why exposing address as platform_name? I think it is not used so how
> > about some friendlier name?
>
> This entry is for selecting "PCM" (DMA) component for the link.
> For proper matching we need to use names of devices for which
> the dmaengine based PCM component is registered (with a call to
> samsung_asoc_dma_platform_register()).
>
> We can't use platform_of_node because 2 PCM components ("3830000.i2s",
> "samsung-i2s-sec") are now associated with same DT node.

Thanks for explanation.
With the unneeded empty line fixup:
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof

Patch
diff mbox series

diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c
index e7b371b07230..bab61e8278a0 100644
--- a/sound/soc/samsung/odroid.c
+++ b/sound/soc/samsung/odroid.c
@@ -7,6 +7,7 @@ 
  */
 
 #include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/module.h>
@@ -17,21 +18,24 @@ 
 
 struct odroid_priv {
 	struct snd_soc_card card;
-	struct snd_soc_dai_link dai_link;
-
 	struct clk *clk_i2s_bus;
 	struct clk *sclk_i2s;
 };
 
-static int odroid_card_startup(struct snd_pcm_substream *substream)
+static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 
 	snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+
 	return 0;
 }
 
-static int odroid_card_hw_params(struct snd_pcm_substream *substream,
+static const struct snd_soc_ops odroid_card_fe_ops = {
+	.startup = odroid_card_fe_startup,
+};
+
+static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
 				      struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
@@ -86,19 +90,56 @@  static int odroid_card_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static const struct snd_soc_ops odroid_card_ops = {
-	.startup = odroid_card_startup,
-	.hw_params = odroid_card_hw_params,
+static const struct snd_soc_ops odroid_card_be_ops = {
+	.hw_params = odroid_card_be_hw_params,
+};
+
+static struct snd_soc_dai_link odroid_card_dais[] = {
+	{
+		/* Primary FE <-> BE link */
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.ops = &odroid_card_fe_ops,
+		.name = "Primary",
+		.stream_name = "Primary",
+		.platform_name = "3830000.i2s",
+		.dynamic = 1,
+		.dpcm_playback = 1,
+	}, {
+		/* BE <-> CODECs link */
+		.name = "I2S Mixer",
+		.cpu_name = "snd-soc-dummy",
+		.cpu_dai_name = "snd-soc-dummy-dai",
+		.platform_name = "snd-soc-dummy",
+		.ops = &odroid_card_be_ops,
+		.no_pcm = 1,
+		.dpcm_playback = 1,
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+				SND_SOC_DAIFMT_CBS_CFS,
+	}, {
+		/* Secondary FE <-> BE link */
+		.playback_only = 1,
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.ops = &odroid_card_fe_ops,
+		.name = "Secondary",
+		.stream_name = "Secondary",
+		.platform_name = "samsung-i2s-sec",
+		.dynamic = 1,
+		.dpcm_playback = 1,
+	}
 };
 
+
 static int odroid_audio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *cpu, *codec;
+	struct device_node *cpu, *cpu_dai, *codec;
 	struct odroid_priv *priv;
-	struct snd_soc_dai_link *link;
 	struct snd_soc_card *card;
-	int ret;
+	struct snd_soc_dai_link *link, *codec_link;
+	int num_pcms, ret, i;
+	struct of_phandle_args args = {};
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -130,45 +171,67 @@  static int odroid_audio_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	link = &priv->dai_link;
-
-	link->ops = &odroid_card_ops;
-	link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
-			SND_SOC_DAIFMT_CBS_CFS;
-
-	card->dai_link = &priv->dai_link;
-	card->num_links = 1;
+	card->dai_link = odroid_card_dais;
+	card->num_links = ARRAY_SIZE(odroid_card_dais);
 
 	cpu = of_get_child_by_name(dev->of_node, "cpu");
 	codec = of_get_child_by_name(dev->of_node, "codec");
+	link = card->dai_link;
+	codec_link = &card->dai_link[1];
 
-	link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
-	if (!link->cpu_of_node) {
-		dev_err(dev, "Failed parsing cpu/sound-dai property\n");
-		return -EINVAL;
+	/*
+	 * For backwards compatibility create the secondary CPU DAI link only
+	 * if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
+	 */
+	num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
+					      "#sound-dai-cells");
+	if (num_pcms == 1)
+		card->num_links--;
+
+	for (i = 0; i < num_pcms; i++, link += 2) {
+		ret = of_parse_phandle_with_args(cpu, "sound-dai",
+						 "#sound-dai-cells", i, &args);
+		if (ret < 0)
+			return ret;
+
+		if (!args.np) {
+			dev_err(dev, "sound-dai property parse error: %d\n", ret);
+			return -EINVAL;
+		}
+
+		ret = snd_soc_get_dai_name(&args, &link->cpu_dai_name);
+		of_node_put(args.np);
+
+		if (ret < 0)
+			return ret;
 	}
 
-	ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+	cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
+	of_node_put(cpu);
+	of_node_put(codec);
+
+	ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
 	if (ret < 0)
 		goto err_put_codec_n;
 
-	link->platform_of_node = link->cpu_of_node;
-
-	link->name = "Primary";
-	link->stream_name = link->name;
-
+	/* Set capture capability only for boards with the MAX98090 CODEC */
+	if (codec_link->num_codecs > 1) {
+		card->dai_link[0].dpcm_capture = 1;
+		card->dai_link[1].dpcm_capture = 1;
+	}
 
-	priv->sclk_i2s = of_clk_get_by_name(link->cpu_of_node, "i2s_opclk1");
+	priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
 	if (IS_ERR(priv->sclk_i2s)) {
 		ret = PTR_ERR(priv->sclk_i2s);
-		goto err_put_i2s_n;
+		goto err_put_codec_n;
 	}
 
-	priv->clk_i2s_bus = of_clk_get_by_name(link->cpu_of_node, "iis");
+	priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
 	if (IS_ERR(priv->clk_i2s_bus)) {
 		ret = PTR_ERR(priv->clk_i2s_bus);
 		goto err_put_sclk;
 	}
+	of_node_put(cpu_dai);
 
 	ret = devm_snd_soc_register_card(dev, card);
 	if (ret < 0) {
@@ -182,10 +245,8 @@  static int odroid_audio_probe(struct platform_device *pdev)
 	clk_put(priv->clk_i2s_bus);
 err_put_sclk:
 	clk_put(priv->sclk_i2s);
-err_put_i2s_n:
-	of_node_put(link->cpu_of_node);
 err_put_codec_n:
-	snd_soc_of_put_dai_link_codecs(link);
+	snd_soc_of_put_dai_link_codecs(codec_link);
 	return ret;
 }
 
@@ -193,8 +254,7 @@  static int odroid_audio_remove(struct platform_device *pdev)
 {
 	struct odroid_priv *priv = platform_get_drvdata(pdev);
 
-	of_node_put(priv->dai_link.cpu_of_node);
-	snd_soc_of_put_dai_link_codecs(&priv->dai_link);
+	snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
 	clk_put(priv->sclk_i2s);
 	clk_put(priv->clk_i2s_bus);