sound/soc/fsl/imx-audmix.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2017 NXP
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
  * Version 2 or later at the following locations:
  *
  * https://www.opensource.org/licenses/gpl-license.html
  * https://www.gnu.org/copyleft/gpl.html
  */

 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/clk.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include "fsl_sai.h"
 #include "fsl_audmix.h"

 struct imx_audmix {
 	struct platform_device *pdev;
 	struct snd_soc_card card;
 	struct platform_device *audmix_pdev;
 	struct platform_device *out_pdev;
 	struct clk *cpu_mclk;
 	int num_dai;
 	struct snd_soc_dai_link *dai;
 	int num_dai_conf;
 	struct snd_soc_codec_conf *dai_conf;
 	int num_dapm_routes;
 	struct snd_soc_dapm_route *dapm_routes;
 };

 static const u32 imx_audmix_rates[] = {
 	8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
 };

 static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
 	.count = ARRAY_SIZE(imx_audmix_rates),
 	.list = imx_audmix_rates,
 };

 static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 	struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct device *dev = rtd->card->dev;
 	unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
 	int ret;

 	if (clk_rate % 24576000 == 0) {
 		ret = snd_pcm_hw_constraint_list(runtime, 0,
 						 SNDRV_PCM_HW_PARAM_RATE,
 						 &imx_audmix_rate_constraints);
 		if (ret < 0)
 			return ret;
 	} else {
 		dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
 	}

 	ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
 					   1, 8);
 	if (ret < 0)
 		return ret;

 	return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
 					    FSL_AUDMIX_FORMATS);
 }

 static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
 				   struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 	struct device *dev = rtd->card->dev;
 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
 	u32 channels = params_channels(params);
 	int ret, dir;

 	/* For playback the AUDMIX is consumer, and for record is provider */
 	fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC;
 	dir  = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;

 	/* set DAI configuration */
 	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
 	if (ret) {
 		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
 		return ret;
 	}

 	ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
 	if (ret) {
 		dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
 		return ret;
 	}

 	/*
 	 * Per datasheet, AUDMIX expects 8 slots and 32 bits
 	 * for every slot in TDM mode.
 	 */
 	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
 				       BIT(channels) - 1, 8, 32);
 	if (ret)
 		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);

 	return ret;
 }

 static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
 				   struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 	struct device *dev = rtd->card->dev;
 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
 	int ret;

 	if (!tx)
 		return 0;

 	/* For playback the AUDMIX is consumer */
 	fmt |= SND_SOC_DAIFMT_BC_FC;

 	/* set AUDMIX DAI configuration */
 	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
 	if (ret)
 		dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);

 	return ret;
 }

 static const struct snd_soc_ops imx_audmix_fe_ops = {
 	.startup = imx_audmix_fe_startup,
 	.hw_params = imx_audmix_fe_hw_params,
 };

 static const struct snd_soc_ops imx_audmix_be_ops = {
 	.hw_params = imx_audmix_be_hw_params,
 };

 static const char *name[][3] = {
 	{"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"},
 	{"sai-tx", "sai-tx", "sai-rx"},
 	{"AUDMIX-Playback-0", "AUDMIX-Playback-1", "CPU-Capture"},
 	{"CPU-Playback", "CPU-Playback", "AUDMIX-Capture-0"},
 };

 static int imx_audmix_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
 	struct platform_device *audmix_pdev = NULL;
 	struct platform_device *cpu_pdev;
 	struct of_phandle_args args;
 	struct imx_audmix *priv;
 	int i, num_dai, ret;
 	const char *fe_name_pref = "HiFi-AUDMIX-FE-";
 	char *be_name, *dai_name;

 	if (pdev->dev.parent) {
 		audmix_np = pdev->dev.parent->of_node;
 	} else {
 		dev_err(&pdev->dev, "Missing parent device.\n");
 		return -EINVAL;
 	}

 	if (!audmix_np) {
 		dev_err(&pdev->dev, "Missing DT node for parent device.\n");
 		return -EINVAL;
 	}

 	audmix_pdev = of_find_device_by_node(audmix_np);
 	if (!audmix_pdev) {
 		dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
 			np->full_name);
 		return -EINVAL;
 	}
 	put_device(&audmix_pdev->dev);

 	num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
 	if (num_dai != FSL_AUDMIX_MAX_DAIS) {
 		dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
 			audmix_np->full_name);
 		return -EINVAL;
 	}

 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	num_dai += 1;
 	priv->num_dai = 2 * num_dai;
 	priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
 				 sizeof(struct snd_soc_dai_link), GFP_KERNEL);
 	if (!priv->dai)
 		return -ENOMEM;

 	priv->num_dai_conf = num_dai;
 	priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
 				      sizeof(struct snd_soc_codec_conf),
 				      GFP_KERNEL);
 	if (!priv->dai_conf)
 		return -ENOMEM;

 	priv->num_dapm_routes = num_dai;
 	priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
 					 sizeof(struct snd_soc_dapm_route),
 					 GFP_KERNEL);
 	if (!priv->dapm_routes)
 		return -ENOMEM;

 	for (i = 0; i < num_dai; i++) {
 		struct snd_soc_dai_link_component *dlc;

 		/* for CPU x 2 */
 		dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
 		if (!dlc)
 			return -ENOMEM;

 		if (i == num_dai - 1)
 			ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, 0,
 							 &args);
 		else
 			ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
 							 &args);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
 			return ret;
 		}

 		cpu_pdev = of_find_device_by_node(args.np);
 		if (!cpu_pdev) {
 			dev_err(&pdev->dev, "failed to find SAI platform device\n");
 			return -EINVAL;
 		}
 		put_device(&cpu_pdev->dev);

 		dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
 					  fe_name_pref, args.np->full_name);
 		if (!dai_name)
 			return -ENOMEM;

 		dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);

 		if (i == num_dai - 1)
 			out_cpu_np = args.np;

 		/*
 		 * CPU == Platform
 		 * platform is using soc-generic-dmaengine-pcm
 		 */
 		priv->dai[i].cpus	=
 		priv->dai[i].platforms	= &dlc[0];
 		priv->dai[i].codecs	= &snd_soc_dummy_dlc;

 		priv->dai[i].num_cpus = 1;
 		priv->dai[i].num_codecs = 1;
 		priv->dai[i].num_platforms = 1;
 		priv->dai[i].name = name[0][i];
 		priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
 		priv->dai[i].cpus->of_node = args.np;
 		priv->dai[i].cpus->dai_name = name[1][i];

 		priv->dai[i].dynamic = 1;
 		priv->dai[i].dpcm_playback = 1;
 		if (i == num_dai - 1) {
 			priv->dai[i].dpcm_capture = 1;
 			priv->dai[i].dpcm_playback = 0;
 		}
 		priv->dai[i].ignore_pmdown_time = 1;
 		priv->dai[i].ops = &imx_audmix_fe_ops;

 		/* Add AUDMIX Backend */
 		be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 					 "audmix-%d", i);
 		priv->dai[num_dai + i].cpus	= &dlc[1];
 		priv->dai[num_dai + i].codecs	= &snd_soc_dummy_dlc;

 		priv->dai[num_dai + i].num_cpus = 1;
 		priv->dai[num_dai + i].num_codecs = 1;

 		priv->dai[num_dai + i].name = be_name;
 		priv->dai[num_dai + i].cpus->of_node = audmix_np;
 		priv->dai[num_dai + i].cpus->dai_name = be_name;
 		priv->dai[num_dai + i].no_pcm = 1;
 		priv->dai[num_dai + i].dpcm_playback = 1;
 		if (i == num_dai - 1) {
 			priv->dai[num_dai + i].dpcm_capture  = 1;
 			priv->dai[num_dai + i].dpcm_playback  = 0;
 		}
 		priv->dai[num_dai + i].ignore_pmdown_time = 1;
 		priv->dai[num_dai + i].ops = &imx_audmix_be_ops;

 		priv->dai_conf[i].dlc.of_node = args.np;
 		priv->dai_conf[i].name_prefix = dai_name;

 		if (i == num_dai - 1) {
 			priv->dapm_routes[i].sink =
 				devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
 					       dai_name, name[2][i]);
 			if (!priv->dapm_routes[i].sink)
 				return -ENOMEM;

 			priv->dapm_routes[i].source = name[3][i];
 		} else {
 			priv->dapm_routes[i].source =
 				devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
 					       dai_name, name[3][i]);
 			if (!priv->dapm_routes[i].source)
 				return -ENOMEM;

 			priv->dapm_routes[i].sink = name[2][i];
 		}
 	}

 	cpu_pdev = of_find_device_by_node(out_cpu_np);
 	if (!cpu_pdev) {
 		dev_err(&pdev->dev, "failed to find SAI platform device\n");
 		return -EINVAL;
 	}
 	put_device(&cpu_pdev->dev);

 	priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
 	if (IS_ERR(priv->cpu_mclk)) {
 		ret = PTR_ERR(priv->cpu_mclk);
 		dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
 		return ret;
 	}

 	priv->audmix_pdev = audmix_pdev;
 	priv->out_pdev  = cpu_pdev;

 	priv->card.dai_link = priv->dai;
 	priv->card.num_links = priv->num_dai;
 	priv->card.codec_conf = priv->dai_conf;
 	priv->card.num_configs = priv->num_dai_conf;
 	priv->card.dapm_routes = priv->dapm_routes;
 	priv->card.num_dapm_routes = priv->num_dapm_routes;
 	priv->card.dev = &pdev->dev;
 	priv->card.owner = THIS_MODULE;
 	priv->card.name = "imx-audmix";

 	platform_set_drvdata(pdev, &priv->card);
 	snd_soc_card_set_drvdata(&priv->card, priv);

 	ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card failed\n");
 		return ret;
 	}

 	return ret;
 }

 static struct platform_driver imx_audmix_driver = {
 	.probe = imx_audmix_probe,
 	.driver = {
 		.name = "imx-audmix",
 		.pm = &snd_soc_pm_ops,
 	},
 };
 module_platform_driver(imx_audmix_driver);

 MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
 MODULE_ALIAS("platform:imx-audmix");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright 2017 NXP
	*
	* The code contained herein is licensed under the GNU General Public
	* License. You may obtain a copy of the GNU General Public License
	* Version 2 or later at the following locations:
	*
	* https://www.opensource.org/licenses/gpl-license.html
	* https://www.gnu.org/copyleft/gpl.html
	*/

	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <linux/clk.h>
	#include <sound/soc.h>
	#include <sound/soc-dapm.h>
	#include "fsl_sai.h"
	#include "fsl_audmix.h"

	struct imx_audmix {
	struct platform_device *pdev;
	struct snd_soc_card card;
	struct platform_device *audmix_pdev;
	struct platform_device *out_pdev;
	struct clk *cpu_mclk;
	int num_dai;
	struct snd_soc_dai_link *dai;
	int num_dai_conf;
	struct snd_soc_codec_conf *dai_conf;
	int num_dapm_routes;
	struct snd_soc_dapm_route *dapm_routes;
	};

	static const u32 imx_audmix_rates[] = {
	8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
	};

	static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
	.count = ARRAY_SIZE(imx_audmix_rates),
	.list = imx_audmix_rates,
	};

	static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct device *dev = rtd->card->dev;
	unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
	int ret;

	if (clk_rate % 24576000 == 0) {
	ret = snd_pcm_hw_constraint_list(runtime, 0,
	SNDRV_PCM_HW_PARAM_RATE,
	&imx_audmix_rate_constraints);
	if (ret < 0)
	return ret;
	} else {
	dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
	}

	ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
	1, 8);
	if (ret < 0)
	return ret;

	return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
	FSL_AUDMIX_FORMATS);
	}

	static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct device *dev = rtd->card->dev;
	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	unsigned int fmt = SND_SOC_DAIFMT_DSP_A \| SND_SOC_DAIFMT_NB_NF;
	u32 channels = params_channels(params);
	int ret, dir;

	/* For playback the AUDMIX is consumer, and for record is provider */
	fmt \|= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC;
	dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;

	/* set DAI configuration */
	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
	if (ret) {
	dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
	if (ret) {
	dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
	return ret;
	}

	/*
	* Per datasheet, AUDMIX expects 8 slots and 32 bits
	* for every slot in TDM mode.
	*/
	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
	BIT(channels) - 1, 8, 32);
	if (ret)
	dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);

	return ret;
	}

	static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct device *dev = rtd->card->dev;
	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	unsigned int fmt = SND_SOC_DAIFMT_DSP_A \| SND_SOC_DAIFMT_NB_NF;
	int ret;

	if (!tx)
	return 0;

	/* For playback the AUDMIX is consumer */
	fmt \|= SND_SOC_DAIFMT_BC_FC;

	/* set AUDMIX DAI configuration */
	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
	if (ret)
	dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);

	return ret;
	}

	static const struct snd_soc_ops imx_audmix_fe_ops = {
	.startup = imx_audmix_fe_startup,
	.hw_params = imx_audmix_fe_hw_params,
	};

	static const struct snd_soc_ops imx_audmix_be_ops = {
	.hw_params = imx_audmix_be_hw_params,
	};

	static const char *name[][3] = {
	{"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"},
	{"sai-tx", "sai-tx", "sai-rx"},
	{"AUDMIX-Playback-0", "AUDMIX-Playback-1", "CPU-Capture"},
	{"CPU-Playback", "CPU-Playback", "AUDMIX-Capture-0"},
	};

	static int imx_audmix_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct device_node audmix_np = NULL, out_cpu_np = NULL;
	struct platform_device *audmix_pdev = NULL;
	struct platform_device *cpu_pdev;
	struct of_phandle_args args;
	struct imx_audmix *priv;
	int i, num_dai, ret;
	const char *fe_name_pref = "HiFi-AUDMIX-FE-";
	char be_name, dai_name;

	if (pdev->dev.parent) {
	audmix_np = pdev->dev.parent->of_node;
	} else {
	dev_err(&pdev->dev, "Missing parent device.\n");
	return -EINVAL;
	}

	if (!audmix_np) {
	dev_err(&pdev->dev, "Missing DT node for parent device.\n");
	return -EINVAL;
	}

	audmix_pdev = of_find_device_by_node(audmix_np);
	if (!audmix_pdev) {
	dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
	np->full_name);
	return -EINVAL;
	}
	put_device(&audmix_pdev->dev);

	num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
	if (num_dai != FSL_AUDMIX_MAX_DAIS) {
	dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
	audmix_np->full_name);
	return -EINVAL;
	}

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	num_dai += 1;
	priv->num_dai = 2 * num_dai;
	priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
	sizeof(struct snd_soc_dai_link), GFP_KERNEL);
	if (!priv->dai)
	return -ENOMEM;

	priv->num_dai_conf = num_dai;
	priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
	sizeof(struct snd_soc_codec_conf),
	GFP_KERNEL);
	if (!priv->dai_conf)
	return -ENOMEM;

	priv->num_dapm_routes = num_dai;
	priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
	sizeof(struct snd_soc_dapm_route),
	GFP_KERNEL);
	if (!priv->dapm_routes)
	return -ENOMEM;

	for (i = 0; i < num_dai; i++) {
	struct snd_soc_dai_link_component *dlc;

	/* for CPU x 2 */
	dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
	if (!dlc)
	return -ENOMEM;

	if (i == num_dai - 1)
	ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, 0,
	&args);
	else
	ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
	&args);
	if (ret < 0) {
	dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
	return ret;
	}

	cpu_pdev = of_find_device_by_node(args.np);
	if (!cpu_pdev) {
	dev_err(&pdev->dev, "failed to find SAI platform device\n");
	return -EINVAL;
	}
	put_device(&cpu_pdev->dev);

	dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
	fe_name_pref, args.np->full_name);
	if (!dai_name)
	return -ENOMEM;

	dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);

	if (i == num_dai - 1)
	out_cpu_np = args.np;

	/*
	* CPU == Platform
	* platform is using soc-generic-dmaengine-pcm
	*/
	priv->dai[i].cpus =
	priv->dai[i].platforms = &dlc[0];
	priv->dai[i].codecs = &snd_soc_dummy_dlc;

	priv->dai[i].num_cpus = 1;
	priv->dai[i].num_codecs = 1;
	priv->dai[i].num_platforms = 1;
	priv->dai[i].name = name[0][i];
	priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
	priv->dai[i].cpus->of_node = args.np;
	priv->dai[i].cpus->dai_name = name[1][i];

	priv->dai[i].dynamic = 1;
	priv->dai[i].dpcm_playback = 1;
	if (i == num_dai - 1) {
	priv->dai[i].dpcm_capture = 1;
	priv->dai[i].dpcm_playback = 0;
	}
	priv->dai[i].ignore_pmdown_time = 1;
	priv->dai[i].ops = &imx_audmix_fe_ops;

	/* Add AUDMIX Backend */
	be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
	"audmix-%d", i);
	priv->dai[num_dai + i].cpus = &dlc[1];
	priv->dai[num_dai + i].codecs = &snd_soc_dummy_dlc;

	priv->dai[num_dai + i].num_cpus = 1;
	priv->dai[num_dai + i].num_codecs = 1;

	priv->dai[num_dai + i].name = be_name;
	priv->dai[num_dai + i].cpus->of_node = audmix_np;
	priv->dai[num_dai + i].cpus->dai_name = be_name;
	priv->dai[num_dai + i].no_pcm = 1;
	priv->dai[num_dai + i].dpcm_playback = 1;
	if (i == num_dai - 1) {
	priv->dai[num_dai + i].dpcm_capture = 1;
	priv->dai[num_dai + i].dpcm_playback = 0;
	}
	priv->dai[num_dai + i].ignore_pmdown_time = 1;
	priv->dai[num_dai + i].ops = &imx_audmix_be_ops;

	priv->dai_conf[i].dlc.of_node = args.np;
	priv->dai_conf[i].name_prefix = dai_name;

	if (i == num_dai - 1) {
	priv->dapm_routes[i].sink =
	devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
	dai_name, name[2][i]);
	if (!priv->dapm_routes[i].sink)
	return -ENOMEM;

	priv->dapm_routes[i].source = name[3][i];
	} else {
	priv->dapm_routes[i].source =
	devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
	dai_name, name[3][i]);
	if (!priv->dapm_routes[i].source)
	return -ENOMEM;

	priv->dapm_routes[i].sink = name[2][i];
	}
	}

	cpu_pdev = of_find_device_by_node(out_cpu_np);
	if (!cpu_pdev) {
	dev_err(&pdev->dev, "failed to find SAI platform device\n");
	return -EINVAL;
	}
	put_device(&cpu_pdev->dev);

	priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
	if (IS_ERR(priv->cpu_mclk)) {
	ret = PTR_ERR(priv->cpu_mclk);
	dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
	return ret;
	}

	priv->audmix_pdev = audmix_pdev;
	priv->out_pdev = cpu_pdev;

	priv->card.dai_link = priv->dai;
	priv->card.num_links = priv->num_dai;
	priv->card.codec_conf = priv->dai_conf;
	priv->card.num_configs = priv->num_dai_conf;
	priv->card.dapm_routes = priv->dapm_routes;
	priv->card.num_dapm_routes = priv->num_dapm_routes;
	priv->card.dev = &pdev->dev;
	priv->card.owner = THIS_MODULE;
	priv->card.name = "imx-audmix";

	platform_set_drvdata(pdev, &priv->card);
	snd_soc_card_set_drvdata(&priv->card, priv);

	ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
	if (ret) {
	dev_err(&pdev->dev, "snd_soc_register_card failed\n");
	return ret;
	}

	return ret;
	}

	static struct platform_driver imx_audmix_driver = {
	.probe = imx_audmix_probe,
	.driver = {
	.name = "imx-audmix",
	.pm = &snd_soc_pm_ops,
	},
	};
	module_platform_driver(imx_audmix_driver);

	MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
	MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
	MODULE_ALIAS("platform:imx-audmix");
	MODULE_LICENSE("GPL v2");