Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 753 insertions, 0 deletions

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
new file mode 100644
index 000000000..5daa824a4
--- /dev/null
+++ b/sound/soc/generic/audio-graph-card.c
@@ -0,0 +1,753 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// ASoC audio graph sound card support
+//
+// Copyright (C) 2016 Renesas Solutions Corp.
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+//
+// based on ${LINUX}/sound/soc/generic/simple-card.c
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <sound/graph_card.h>
+
+#define DPCM_SELECTABLE 1
+
+static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
+			      struct snd_kcontrol *kcontrol,
+			      int event)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		gpiod_set_value_cansleep(priv->pa_gpio, 1);
+		break;
+	case SND_SOC_DAPM_PRE_PMD:
+		gpiod_set_value_cansleep(priv->pa_gpio, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
+	SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
+			       0, 0, NULL, 0, graph_outdrv_event,
+			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+};
+
+static const struct snd_soc_ops graph_ops = {
+	.startup	= asoc_simple_startup,
+	.shutdown	= asoc_simple_shutdown,
+	.hw_params	= asoc_simple_hw_params,
+};
+
+static int graph_get_dai_id(struct device_node *ep)
+{
+	struct device_node *node;
+	struct device_node *endpoint;
+	struct of_endpoint info;
+	int i, id;
+	const u32 *reg;
+	int ret;
+
+	/* use driver specified DAI ID if exist */
+	ret = snd_soc_get_dai_id(ep);
+	if (ret != -ENOTSUPP)
+		return ret;
+
+	/* use endpoint/port reg if exist */
+	ret = of_graph_parse_endpoint(ep, &info);
+	if (ret == 0) {
+		/*
+		 * Because it will count port/endpoint if it doesn't have "reg".
+		 * But, we can't judge whether it has "no reg", or "reg = <0>"
+		 * only of_graph_parse_endpoint().
+		 * We need to check "reg" property
+		 */
+		if (of_get_property(ep,   "reg", NULL))
+			return info.id;
+
+		node = of_get_parent(ep);
+		reg = of_get_property(node, "reg", NULL);
+		of_node_put(node);
+		if (reg)
+			return info.port;
+	}
+	node = of_graph_get_port_parent(ep);
+
+	/*
+	 * Non HDMI sound case, counting port/endpoint on its DT
+	 * is enough. Let's count it.
+	 */
+	i = 0;
+	id = -1;
+	for_each_endpoint_of_node(node, endpoint) {
+		if (endpoint == ep)
+			id = i;
+		i++;
+	}
+
+	of_node_put(node);
+
+	if (id < 0)
+		return -ENODEV;
+
+	return id;
+}
+
+static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
+{
+	struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
+
+	if (dai && (dai->component->driver->pcm_construct ||
+		    dai->driver->pcm_new))
+		return true;
+
+	return false;
+}
+
+static int asoc_simple_parse_dai(struct device_node *ep,
+				 struct snd_soc_dai_link_component *dlc,
+				 int *is_single_link)
+{
+	struct device_node *node;
+	struct of_phandle_args args;
+	int ret;
+
+	if (!ep)
+		return 0;
+
+	node = of_graph_get_port_parent(ep);
+
+	/* Get dai->name */
+	args.np		= node;
+	args.args[0]	= graph_get_dai_id(ep);
+	args.args_count	= (of_graph_get_endpoint_count(node) > 1);
+
+	/*
+	 * FIXME
+	 *
+	 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
+	 * If user unbinded CPU or Codec driver, but not for Sound Card,
+	 * dlc->dai_name is keeping unbinded CPU or Codec
+	 * driver's pointer.
+	 *
+	 * If user re-bind CPU or Codec driver again, ALSA SoC will try
+	 * to rebind Card via snd_soc_try_rebind_card(), but because of
+	 * above reason, it might can't bind Sound Card.
+	 * Because Sound Card is pointing to released dai_name pointer.
+	 *
+	 * To avoid this rebind Card issue,
+	 * 1) It needs to alloc memory to keep dai_name eventhough
+	 *    CPU or Codec driver was unbinded, or
+	 * 2) user need to rebind Sound Card everytime
+	 *    if he unbinded CPU or Codec.
+	 */
+	ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
+	if (ret < 0) {
+		of_node_put(node);
+		return ret;
+	}
+
+	dlc->of_node = node;
+
+	if (is_single_link)
+		*is_single_link = of_graph_get_endpoint_count(node) == 1;
+
+	return 0;
+}
+
+static void graph_parse_convert(struct device *dev,
+				struct device_node *ep,
+				struct asoc_simple_data *adata)
+{
+	struct device_node *top = dev->of_node;
+	struct device_node *port = of_get_parent(ep);
+	struct device_node *ports = of_get_parent(port);
+	struct device_node *node = of_graph_get_port_parent(ep);
+
+	asoc_simple_parse_convert(top,   NULL,   adata);
+	if (of_node_name_eq(ports, "ports"))
+		asoc_simple_parse_convert(ports, NULL, adata);
+	asoc_simple_parse_convert(port,  NULL,   adata);
+	asoc_simple_parse_convert(ep,    NULL,   adata);
+
+	of_node_put(port);
+	of_node_put(ports);
+	of_node_put(node);
+}
+
+static void graph_parse_mclk_fs(struct device_node *top,
+				struct device_node *ep,
+				struct simple_dai_props *props)
+{
+	struct device_node *port	= of_get_parent(ep);
+	struct device_node *ports	= of_get_parent(port);
+
+	of_property_read_u32(top,	"mclk-fs", &props->mclk_fs);
+	if (of_node_name_eq(ports, "ports"))
+		of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
+	of_property_read_u32(port,	"mclk-fs", &props->mclk_fs);
+	of_property_read_u32(ep,	"mclk-fs", &props->mclk_fs);
+
+	of_node_put(port);
+	of_node_put(ports);
+}
+
+static int graph_parse_node(struct asoc_simple_priv *priv,
+			    struct device_node *ep,
+			    struct link_info *li,
+			    int *cpu)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *top = dev->of_node;
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
+	struct snd_soc_dai_link_component *dlc;
+	struct asoc_simple_dai *dai;
+	int ret;
+
+	if (cpu) {
+		dlc = asoc_link_to_cpu(dai_link, 0);
+		dai = simple_props_to_dai_cpu(dai_props, 0);
+	} else {
+		dlc = asoc_link_to_codec(dai_link, 0);
+		dai = simple_props_to_dai_codec(dai_props, 0);
+	}
+
+	graph_parse_mclk_fs(top, ep, dai_props);
+
+	ret = asoc_simple_parse_dai(ep, dlc, cpu);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_tdm(ep, dai);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int graph_link_init(struct asoc_simple_priv *priv,
+			   struct device_node *cpu_ep,
+			   struct device_node *codec_ep,
+			   struct link_info *li,
+			   char *name)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	int ret;
+
+	ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
+				       NULL, &dai_link->dai_fmt);
+	if (ret < 0)
+		return ret;
+
+	dai_link->init		= asoc_simple_dai_init;
+	dai_link->ops		= &graph_ops;
+	if (priv->ops)
+		dai_link->ops	= priv->ops;
+
+	return asoc_simple_set_dailink_name(dev, dai_link, name);
+}
+
+static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
+				  struct device_node *cpu_ep,
+				  struct device_node *codec_ep,
+				  struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
+	struct device_node *top = dev->of_node;
+	struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
+	char dai_name[64];
+	int ret;
+
+	dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
+
+	if (li->cpu) {
+		struct snd_soc_card *card = simple_priv_to_card(priv);
+		struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
+		struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
+		int is_single_links = 0;
+
+		/* Codec is dummy */
+
+		/* FE settings */
+		dai_link->dynamic		= 1;
+		dai_link->dpcm_merged_format	= 1;
+
+		ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
+		if (ret)
+			return ret;
+
+		snprintf(dai_name, sizeof(dai_name),
+			 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name);
+		/*
+		 * In BE<->BE connections it is not required to create
+		 * PCM devices at CPU end of the dai link and thus 'no_pcm'
+		 * flag needs to be set. It is useful when there are many
+		 * BE components and some of these have to be connected to
+		 * form a valid audio path.
+		 *
+		 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
+		 * there are 'n' BE components in the path.
+		 */
+		if (card->component_chaining && !soc_component_is_pcm(cpus)) {
+			dai_link->no_pcm = 1;
+			dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
+		}
+
+		asoc_simple_canonicalize_cpu(cpus, is_single_links);
+		asoc_simple_canonicalize_platform(platforms, cpus);
+	} else {
+		struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0);
+		struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
+		struct device_node *port;
+		struct device_node *ports;
+
+		/* CPU is dummy */
+
+		/* BE settings */
+		dai_link->no_pcm		= 1;
+		dai_link->be_hw_params_fixup	= asoc_simple_be_hw_params_fixup;
+
+		ret = graph_parse_node(priv, codec_ep, li, NULL);
+		if (ret < 0)
+			return ret;
+
+		snprintf(dai_name, sizeof(dai_name),
+			 "be.%pOFP.%s", codecs->of_node, codecs->dai_name);
+
+		/* check "prefix" from top node */
+		port = of_get_parent(ep);
+		ports = of_get_parent(port);
+		snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
+					      "prefix");
+		if (of_node_name_eq(ports, "ports"))
+			snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
+		snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
+					     "prefix");
+
+		of_node_put(ports);
+		of_node_put(port);
+	}
+
+	graph_parse_convert(dev, ep, &dai_props->adata);
+
+	snd_soc_dai_link_set_capabilities(dai_link);
+
+	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
+
+	li->link++;
+
+	return ret;
+}
+
+static int graph_dai_link_of(struct asoc_simple_priv *priv,
+			     struct device_node *cpu_ep,
+			     struct device_node *codec_ep,
+			     struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+	struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0);
+	struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0);
+	struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0);
+	char dai_name[64];
+	int ret, is_single_links = 0;
+
+	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
+
+	ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
+	if (ret < 0)
+		return ret;
+
+	ret = graph_parse_node(priv, codec_ep, li, NULL);
+	if (ret < 0)
+		return ret;
+
+	snprintf(dai_name, sizeof(dai_name),
+		 "%s-%s", cpus->dai_name, codecs->dai_name);
+
+	asoc_simple_canonicalize_cpu(cpus, is_single_links);
+	asoc_simple_canonicalize_platform(platforms, cpus);
+
+	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
+	if (ret < 0)
+		return ret;
+
+	li->link++;
+
+	return 0;
+}
+
+static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
+				      struct device_node *codec_port,
+				      struct asoc_simple_data *adata)
+{
+	if (priv->force_dpcm)
+		return true;
+
+	if (!priv->dpcm_selectable)
+		return false;
+
+	/*
+	 * It is DPCM
+	 * if Codec port has many endpoints,
+	 * or has convert-xxx property
+	 */
+	if ((of_get_child_count(codec_port) > 1) ||
+	    asoc_simple_is_convert_required(adata))
+		return true;
+
+	return false;
+}
+
+static int __graph_for_each_link(struct asoc_simple_priv *priv,
+			struct link_info *li,
+			int (*func_noml)(struct asoc_simple_priv *priv,
+					 struct device_node *cpu_ep,
+					 struct device_node *codec_ep,
+					 struct link_info *li),
+			int (*func_dpcm)(struct asoc_simple_priv *priv,
+					 struct device_node *cpu_ep,
+					 struct device_node *codec_ep,
+					 struct link_info *li))
+{
+	struct of_phandle_iterator it;
+	struct device *dev = simple_priv_to_dev(priv);
+	struct device_node *node = dev->of_node;
+	struct device_node *cpu_port;
+	struct device_node *cpu_ep;
+	struct device_node *codec_ep;
+	struct device_node *codec_port;
+	struct device_node *codec_port_old = NULL;
+	struct asoc_simple_data adata;
+	int rc, ret = 0;
+
+	/* loop for all listed CPU port */
+	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
+		cpu_port = it.node;
+		cpu_ep	 = NULL;
+
+		/* loop for all CPU endpoint */
+		while (1) {
+			cpu_ep = of_get_next_child(cpu_port, cpu_ep);
+			if (!cpu_ep)
+				break;
+
+			/* get codec */
+			codec_ep = of_graph_get_remote_endpoint(cpu_ep);
+			codec_port = of_get_parent(codec_ep);
+
+			/* get convert-xxx property */
+			memset(&adata, 0, sizeof(adata));
+			graph_parse_convert(dev, codec_ep, &adata);
+			graph_parse_convert(dev, cpu_ep,   &adata);
+
+			/* check if link requires DPCM parsing */
+			if (parse_as_dpcm_link(priv, codec_port, &adata)) {
+				/*
+				 * Codec endpoint can be NULL for pluggable audio HW.
+				 * Platform DT can populate the Codec endpoint depending on the
+				 * plugged HW.
+				 */
+				/* Do it all CPU endpoint, and 1st Codec endpoint */
+				if (li->cpu ||
+				    ((codec_port_old != codec_port) && codec_ep))
+					ret = func_dpcm(priv, cpu_ep, codec_ep, li);
+			/* else normal sound */
+			} else {
+				if (li->cpu)
+					ret = func_noml(priv, cpu_ep, codec_ep, li);
+			}
+
+			of_node_put(codec_ep);
+			of_node_put(codec_port);
+
+			if (ret < 0) {
+				of_node_put(cpu_ep);
+				return ret;
+			}
+
+			codec_port_old = codec_port;
+		}
+	}
+
+	return 0;
+}
+
+static int graph_for_each_link(struct asoc_simple_priv *priv,
+			       struct link_info *li,
+			       int (*func_noml)(struct asoc_simple_priv *priv,
+						struct device_node *cpu_ep,
+						struct device_node *codec_ep,
+						struct link_info *li),
+			       int (*func_dpcm)(struct asoc_simple_priv *priv,
+						struct device_node *cpu_ep,
+						struct device_node *codec_ep,
+						struct link_info *li))
+{
+	int ret;
+	/*
+	 * Detect all CPU first, and Detect all Codec 2nd.
+	 *
+	 * In Normal sound case, all DAIs are detected
+	 * as "CPU-Codec".
+	 *
+	 * In DPCM sound case,
+	 * all CPUs   are detected as "CPU-dummy", and
+	 * all Codecs are detected as "dummy-Codec".
+	 * To avoid random sub-device numbering,
+	 * detect "dummy-Codec" in last;
+	 */
+	for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
+		ret = __graph_for_each_link(priv, li, func_noml, func_dpcm);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static int graph_get_dais_count(struct asoc_simple_priv *priv,
+				struct link_info *li);
+
+int audio_graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
+{
+	struct snd_soc_card *card = simple_priv_to_card(priv);
+	struct link_info *li;
+	int ret;
+
+	li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
+	if (!li)
+		return -ENOMEM;
+
+	card->owner = THIS_MODULE;
+	card->dev = dev;
+
+	ret = graph_get_dais_count(priv, li);
+	if (ret < 0)
+		return ret;
+
+	if (!li->link)
+		return -EINVAL;
+
+	ret = asoc_simple_init_priv(priv, li);
+	if (ret < 0)
+		return ret;
+
+	priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
+	if (IS_ERR(priv->pa_gpio)) {
+		ret = PTR_ERR(priv->pa_gpio);
+		dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
+		return ret;
+	}
+
+	ret = asoc_simple_parse_widgets(card, NULL);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_parse_routing(card, NULL);
+	if (ret < 0)
+		return ret;
+
+	memset(li, 0, sizeof(*li));
+	ret = graph_for_each_link(priv, li,
+				  graph_dai_link_of,
+				  graph_dai_link_of_dpcm);
+	if (ret < 0)
+		goto err;
+
+	ret = asoc_simple_parse_card_name(card, NULL);
+	if (ret < 0)
+		goto err;
+
+	snd_soc_card_set_drvdata(card, priv);
+
+	asoc_simple_debug_info(priv);
+
+	ret = devm_snd_soc_register_card(dev, card);
+	if (ret < 0)
+		goto err;
+
+	devm_kfree(dev, li);
+	return 0;
+
+err:
+	asoc_simple_clean_reference(card);
+
+	return dev_err_probe(dev, ret, "parse error\n");
+}
+EXPORT_SYMBOL_GPL(audio_graph_parse_of);
+
+static int graph_count_noml(struct asoc_simple_priv *priv,
+			    struct device_node *cpu_ep,
+			    struct device_node *codec_ep,
+			    struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+
+	if (li->link >= SNDRV_MAX_LINKS) {
+		dev_err(dev, "too many links\n");
+		return -EINVAL;
+	}
+
+	li->num[li->link].cpus		= 1;
+	li->num[li->link].codecs	= 1;
+	li->num[li->link].platforms     = 1;
+
+	li->link += 1; /* 1xCPU-Codec */
+
+	dev_dbg(dev, "Count As Normal\n");
+
+	return 0;
+}
+
+static int graph_count_dpcm(struct asoc_simple_priv *priv,
+			    struct device_node *cpu_ep,
+			    struct device_node *codec_ep,
+			    struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+
+	if (li->link >= SNDRV_MAX_LINKS) {
+		dev_err(dev, "too many links\n");
+		return -EINVAL;
+	}
+
+	if (li->cpu) {
+		li->num[li->link].cpus		= 1;
+		li->num[li->link].platforms     = 1;
+
+		li->link++; /* 1xCPU-dummy */
+	} else {
+		li->num[li->link].codecs	= 1;
+
+		li->link++; /* 1xdummy-Codec */
+	}
+
+	dev_dbg(dev, "Count As DPCM\n");
+
+	return 0;
+}
+
+static int graph_get_dais_count(struct asoc_simple_priv *priv,
+				struct link_info *li)
+{
+	/*
+	 * link_num :	number of links.
+	 *		CPU-Codec / CPU-dummy / dummy-Codec
+	 * dais_num :	number of DAIs
+	 * ccnf_num :	number of codec_conf
+	 *		same number for "dummy-Codec"
+	 *
+	 * ex1)
+	 * CPU0 --- Codec0	link : 5
+	 * CPU1 --- Codec1	dais : 7
+	 * CPU2 -/		ccnf : 1
+	 * CPU3 --- Codec2
+	 *
+	 *	=> 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
+	 *	=> 7 DAIs  = 4xCPU + 3xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 *
+	 * ex2)
+	 * CPU0 --- Codec0	link : 5
+	 * CPU1 --- Codec1	dais : 6
+	 * CPU2 -/		ccnf : 1
+	 * CPU3 -/
+	 *
+	 *	=> 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
+	 *	=> 6 DAIs  = 4xCPU + 2xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 *
+	 * ex3)
+	 * CPU0 --- Codec0	link : 6
+	 * CPU1 -/		dais : 6
+	 * CPU2 --- Codec1	ccnf : 2
+	 * CPU3 -/
+	 *
+	 *	=> 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
+	 *	=> 6 DAIs  = 4xCPU + 2xCodec
+	 *	=> 2 ccnf  = 2xdummy-Codec
+	 *
+	 * ex4)
+	 * CPU0 --- Codec0 (convert-rate)	link : 3
+	 * CPU1 --- Codec1			dais : 4
+	 *					ccnf : 1
+	 *
+	 *	=> 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
+	 *	=> 4 DAIs  = 2xCPU + 2xCodec
+	 *	=> 1 ccnf  = 1xdummy-Codec
+	 */
+	return graph_for_each_link(priv, li,
+				   graph_count_noml,
+				   graph_count_dpcm);
+}
+
+static int graph_probe(struct platform_device *pdev)
+{
+	struct asoc_simple_priv *priv;
+	struct device *dev = &pdev->dev;
+	struct snd_soc_card *card;
+
+	/* Allocate the private data and the DAI link array */
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	card = simple_priv_to_card(priv);
+	card->dapm_widgets	= graph_dapm_widgets;
+	card->num_dapm_widgets	= ARRAY_SIZE(graph_dapm_widgets);
+	card->probe		= asoc_graph_card_probe;
+
+	if (of_device_get_match_data(dev))
+		priv->dpcm_selectable = 1;
+
+	return audio_graph_parse_of(priv, dev);
+}
+
+static const struct of_device_id graph_of_match[] = {
+	{ .compatible = "audio-graph-card", },
+	{ .compatible = "audio-graph-scu-card",
+	  .data = (void *)DPCM_SELECTABLE },
+	{},
+};
+MODULE_DEVICE_TABLE(of, graph_of_match);
+
+static struct platform_driver graph_card = {
+	.driver = {
+		.name = "asoc-audio-graph-card",
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = graph_of_match,
+	},
+	.probe = graph_probe,
+	.remove = asoc_simple_remove,
+};
+module_platform_driver(graph_card);
+
+MODULE_ALIAS("platform:asoc-audio-graph-card");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");