Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Unverified Commit aff8d2be authored by Sylwester Nawrocki's avatar Sylwester Nawrocki Committed by Mark Brown
Browse files

ASoC: samsung: Add HDMI audio support for Snow 



This patch updates the driver so, in addition to current DT bindings, it
also can also use the new DT bindings with cpu, codec subnodes which allow
to support sound on the HDMI interface.

Signed-off-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ea3f79e2

sound/soc/samsung/snow.c

+177 −47
Original line number Diff line number Diff line
@@ -11,92 +11,207 @@ 
 * General Public License for more details.

 */



#include <linux/clk.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/of_device.h>



#include <sound/pcm_params.h>

#include <sound/soc.h>



#include "i2s.h"



#define FIN_PLL_RATE		24000000



static struct snd_soc_dai_link snow_dai[] = {

struct snow_priv {

	struct snd_soc_dai_link dai_link;

	struct clk *clk_i2s_bus;

};



static int snow_card_hw_params(struct snd_pcm_substream *substream,

				      struct snd_pcm_hw_params *params)

{

		.name = "Primary",

		.stream_name = "Primary",

		.codec_dai_name = "HiFi",

		.dai_fmt = SND_SOC_DAIFMT_I2S |

				SND_SOC_DAIFMT_NB_NF |

				SND_SOC_DAIFMT_CBS_CFS,

	},

	static const unsigned int pll_rate[] = {

		73728000U, 67737602U, 49152000U, 45158401U, 32768001U

	};

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snow_priv *priv = snd_soc_card_get_drvdata(rtd->card);

	int bfs, psr, rfs, bitwidth;

	unsigned long int rclk;

	long int freq = -EINVAL;

	int ret, i;



	bitwidth = snd_pcm_format_width(params_format(params));

	if (bitwidth < 0) {

		dev_err(rtd->card->dev, "Invalid bit-width: %d\n", bitwidth);

		return bitwidth;

	}



	if (bitwidth != 16 && bitwidth != 24) {

		dev_err(rtd->card->dev, "Unsupported bit-width: %d\n", bitwidth);

		return -EINVAL;

	}



	bfs = 2 * bitwidth;



	switch (params_rate(params)) {

	case 16000:

	case 22050:

	case 24000:

	case 32000:

	case 44100:

	case 48000:

	case 88200:

	case 96000:

		rfs = 8 * bfs;

		break;

	case 64000:

		rfs = 384;

		break;

	case 8000:

	case 11025:

	case 12000:

		rfs = 16 * bfs;

		break;

	default:

		return -EINVAL;

	}



	rclk = params_rate(params) * rfs;



	for (psr = 8; psr > 0; psr /= 2) {

		for (i = 0; i < ARRAY_SIZE(pll_rate); i++) {

			if ((pll_rate[i] - rclk * psr) <= 2) {

				freq = pll_rate[i];

				break;

			}

		}

	}

	if (freq < 0) {

		dev_err(rtd->card->dev, "Unsupported RCLK rate: %lu\n", rclk);

		return -EINVAL;

	}



	ret = clk_set_rate(priv->clk_i2s_bus, freq);

	if (ret < 0) {

		dev_err(rtd->card->dev, "I2S bus clock rate set failed\n");

		return ret;

	}



	return 0;

}



static const struct snd_soc_ops snow_card_ops = {

	.hw_params = snow_card_hw_params,

};



static int snow_late_probe(struct snd_soc_card *card)

{

	struct snd_soc_pcm_runtime *rtd;

	struct snd_soc_dai *codec_dai;

	struct snd_soc_dai *cpu_dai;

	int ret;



	rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);



	/* In the multi-codec case codec_dais 0 is MAX98095 and 1 is HDMI. */

	if (rtd->num_codecs > 1)

		codec_dai = rtd->codec_dais[0];

	else

		codec_dai = rtd->codec_dai;

	cpu_dai = rtd->cpu_dai;



	/* Set the MCLK rate for the codec */

	ret = snd_soc_dai_set_sysclk(codec_dai, 0,

	return snd_soc_dai_set_sysclk(codec_dai, 0,

				FIN_PLL_RATE, SND_SOC_CLOCK_IN);

	if (ret < 0)

		return ret;





	return 0;

}



static struct snd_soc_card snow_snd = {

	.name = "Snow-I2S",

	.owner = THIS_MODULE,

	.dai_link = snow_dai,

	.num_links = ARRAY_SIZE(snow_dai),



	.late_probe = snow_late_probe,

};



static int snow_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct snd_soc_card *card = &snow_snd;

	struct device_node *i2s_node, *codec_node;

	int i, ret;

	struct device_node *cpu, *codec;

	struct snd_soc_dai_link *link;

	struct snow_priv *priv;

	int ret;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	link = &priv->dai_link;



	link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |

			SND_SOC_DAIFMT_CBS_CFS;



	link->name = "Primary";

	link->stream_name = link->name;



	card->dai_link = link;

	card->num_links = 1;

	card->dev = dev;



	/* Try new DT bindings with HDMI support first. */

	cpu = of_get_child_by_name(dev->of_node, "cpu");



	if (cpu) {

		link->ops = &snow_card_ops;



		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);

		of_node_put(cpu);



		if (!link->cpu_of_node) {

			dev_err(dev, "Failed parsing cpu/sound-dai property\n");

			return -EINVAL;

		}



	i2s_node = of_parse_phandle(pdev->dev.of_node,

		codec = of_get_child_by_name(dev->of_node, "codec");

		ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);

		of_node_put(codec);



		if (ret < 0) {

			of_node_put(link->cpu_of_node);

			dev_err(dev, "Failed parsing codec node\n");

			return ret;

		}



		priv->clk_i2s_bus = of_clk_get_by_name(link->cpu_of_node,

						       "i2s_opclk0");

		if (IS_ERR(priv->clk_i2s_bus)) {

			snd_soc_of_put_dai_link_codecs(link);

			of_node_put(link->cpu_of_node);

			return PTR_ERR(priv->clk_i2s_bus);

		}

	} else {

		link->codec_dai_name = "HiFi",



		link->cpu_of_node = of_parse_phandle(dev->of_node,

						"samsung,i2s-controller", 0);

	if (!i2s_node) {

		dev_err(&pdev->dev,

			"Property 'i2s-controller' missing or invalid\n");

		if (!link->cpu_of_node) {

			dev_err(dev, "i2s-controller property parse error\n");

			return -EINVAL;

		}



	codec_node = of_parse_phandle(pdev->dev.of_node,

		link->codec_of_node = of_parse_phandle(dev->of_node,

						"samsung,audio-codec", 0);

	if (!codec_node) {

		dev_err(&pdev->dev,

			"Property 'audio-codec' missing or invalid\n");

		if (!link->codec_of_node) {

			of_node_put(link->cpu_of_node);

			dev_err(dev, "audio-codec property parse error\n");

			return -EINVAL;

		}



	for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {

		snow_dai[i].codec_of_node = codec_node;

		snow_dai[i].cpu_of_node = i2s_node;

		snow_dai[i].platform_of_node = i2s_node;

	}



	card->dev = &pdev->dev;

	link->platform_of_node = link->cpu_of_node;



	/* Update card-name if provided through DT, else use default name */

	snd_soc_of_parse_card_name(card, "samsung,model");



	ret = devm_snd_soc_register_card(&pdev->dev, card);

	snd_soc_card_set_drvdata(card, priv);



	ret = devm_snd_soc_register_card(dev, card);

	if (ret) {

		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);

		return ret;
@@ -105,6 +220,20 @@ static int snow_probe(struct platform_device *pdev) 
	return ret;

}



static int snow_remove(struct platform_device *pdev)

{

	struct snow_priv *priv = platform_get_drvdata(pdev);

	struct snd_soc_dai_link *link = &priv->dai_link;



	of_node_put(link->cpu_of_node);

	of_node_put(link->codec_of_node);

	snd_soc_of_put_dai_link_codecs(link);



	clk_put(priv->clk_i2s_bus);



	return 0;

}



static const struct of_device_id snow_of_match[] = {

	{ .compatible = "google,snow-audio-max98090", },

	{ .compatible = "google,snow-audio-max98091", },
@@ -120,6 +249,7 @@ static struct platform_driver snow_driver = { 
		.of_match_table = snow_of_match,

	},

	.probe = snow_probe,

	.remove = snow_remove,

};



module_platform_driver(snow_driver);