1 files changed, 532 insertions, 209 deletions

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index de2550c7a96b..7720cf1fd6e1 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -1,45 +1,50 @@
-/*
- * 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
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
+// 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/cleanup.h>
 #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/jack.h>
-#include <sound/simple_card_utils.h>
-
-struct graph_card_data {
-	struct snd_soc_card snd_card;
-	struct graph_dai_props {
-		struct asoc_simple_dai cpu_dai;
-		struct asoc_simple_dai codec_dai;
-	} *dai_props;
-	struct snd_soc_dai_link *dai_link;
-	struct gpio_desc *pa_gpio;
-};
+#include <sound/graph_card.h>
+
+#define DPCM_SELECTABLE 1
+
+#define graph_ret(priv, ret) _graph_ret(priv, __func__, ret)
+static inline int _graph_ret(struct simple_util_priv *priv,
+			     const char *func, int ret)
+{
+	return snd_soc_ret(simple_priv_to_dev(priv), ret, "at %s()\n", func);
+}
+
+#define ep_to_port(ep)	of_get_parent(ep)
+static struct device_node *port_to_ports(struct device_node *port)
+{
+	struct device_node *ports = of_get_parent(port);
 
-static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w,
-					struct snd_kcontrol *kcontrol,
-					int event)
+	if (!of_node_name_eq(ports, "ports")) {
+		of_node_put(ports);
+		return NULL;
+	}
+	return ports;
+}
+
+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 graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card);
+	struct snd_soc_card *card = snd_soc_dapm_to_card(w->dapm);
+	struct simple_util_priv *priv = snd_soc_card_get_drvdata(card);
 
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
@@ -55,282 +60,600 @@ static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w,
 	return 0;
 }
 
-static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = {
+static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
 	SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
-			       0, 0, NULL, 0, asoc_graph_card_outdrv_event,
+			       0, 0, NULL, 0, graph_outdrv_event,
 			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 };
 
-#define graph_priv_to_card(priv) (&(priv)->snd_card)
-#define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
-#define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
-#define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
+static const struct snd_soc_ops graph_ops = {
+	.startup	= simple_util_startup,
+	.shutdown	= simple_util_shutdown,
+	.hw_params	= simple_util_hw_params,
+};
 
-static int asoc_graph_card_startup(struct snd_pcm_substream *substream)
+static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
-	struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
-	int ret;
-
-	ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
-	if (ret)
-		return ret;
+	struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
 
-	ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
-	if (ret)
-		asoc_simple_card_clk_disable(&dai_props->cpu_dai);
+	if (dai && (dai->component->driver->pcm_construct ||
+		    (dai->driver->ops && dai->driver->ops->pcm_new)))
+		return true;
 
-	return ret;
+	return false;
 }
 
-static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream)
+static void graph_parse_convert(struct device *dev,
+				struct device_node *ep,
+				struct simple_util_data *adata)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
-	struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
-
-	asoc_simple_card_clk_disable(&dai_props->cpu_dai);
-
-	asoc_simple_card_clk_disable(&dai_props->codec_dai);
+	struct device_node *top = dev->of_node;
+	struct device_node *port  __free(device_node) = ep_to_port(ep);
+	struct device_node *ports __free(device_node) = port_to_ports(port);
+	struct device_node *node  __free(device_node) = of_graph_get_port_parent(ep);
+
+	simple_util_parse_convert(top,   NULL,   adata);
+	simple_util_parse_convert(ports, NULL,   adata);
+	simple_util_parse_convert(port,  NULL,   adata);
+	simple_util_parse_convert(ep,    NULL,   adata);
 }
 
-static struct snd_soc_ops asoc_graph_card_ops = {
-	.startup = asoc_graph_card_startup,
-	.shutdown = asoc_graph_card_shutdown,
-};
-
-static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
+static int graph_parse_node(struct simple_util_priv *priv,
+			    struct device_node *ep,
+			    struct link_info *li,
+			    int *cpu)
 {
-	struct graph_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
-	struct snd_soc_dai *codec = rtd->codec_dai;
-	struct snd_soc_dai *cpu = rtd->cpu_dai;
-	struct graph_dai_props *dai_props =
-		graph_priv_to_props(priv, rtd->num);
+	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 snd_soc_dai_link_component *dlc;
+	struct simple_util_dai *dai;
 	int ret;
 
-	ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
+	if (cpu) {
+		dlc = snd_soc_link_to_cpu(dai_link, 0);
+		dai = simple_props_to_dai_cpu(dai_props, 0);
+	} else {
+		dlc = snd_soc_link_to_codec(dai_link, 0);
+		dai = simple_props_to_dai_codec(dai_props, 0);
+	}
+
+	ret = graph_util_parse_dai(priv, ep, dlc, cpu);
 	if (ret < 0)
-		return ret;
+		goto end;
 
-	ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
+	ret = simple_util_parse_tdm(ep, dai);
 	if (ret < 0)
-		return ret;
+		goto end;
 
-	return 0;
+	ret = simple_util_parse_clk(dev, ep, dai, dlc);
+end:
+	return graph_ret(priv, ret);
 }
 
-static int asoc_graph_card_dai_link_of(struct device_node *cpu_port,
-					struct graph_card_data *priv,
-					int idx)
+static int graph_link_init(struct simple_util_priv *priv,
+			   struct device_node *ep_cpu,
+			   struct device_node *ep_codec,
+			   struct link_info *li,
+			   char *name)
 {
-	struct device *dev = graph_priv_to_dev(priv);
-	struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
-	struct graph_dai_props *dai_props = graph_priv_to_props(priv, idx);
-	struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
-	struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
-	struct device_node *cpu_ep    = of_get_next_child(cpu_port, NULL);
-	struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
-	struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
+	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 device_node *port_cpu    __free(device_node) = ep_to_port(ep_cpu);
+	struct device_node *port_codec  __free(device_node) = ep_to_port(ep_codec);
+	struct device_node *ports_cpu   __free(device_node) = port_to_ports(port_cpu);
+	struct device_node *ports_codec __free(device_node) = port_to_ports(port_codec);
+	enum snd_soc_trigger_order trigger_start = SND_SOC_TRIGGER_ORDER_DEFAULT;
+	enum snd_soc_trigger_order trigger_stop  = SND_SOC_TRIGGER_ORDER_DEFAULT;
+	bool playback_only = 0, capture_only = 0;
 	int ret;
 
-	if (rcpu_ep != cpu_ep) {
-		dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n",
-			cpu_ep->name, codec_ep->name, rcpu_ep->name);
-		ret = -EINVAL;
-		goto dai_link_of_err;
+	ret = simple_util_parse_daifmt(dev, ep_cpu, ep_codec,
+				       NULL, &dai_link->dai_fmt);
+	if (ret < 0)
+		goto end;
+
+	graph_util_parse_link_direction(top,		&playback_only, &capture_only);
+	graph_util_parse_link_direction(port_cpu,	&playback_only, &capture_only);
+	graph_util_parse_link_direction(port_codec,	&playback_only, &capture_only);
+	graph_util_parse_link_direction(ep_cpu,		&playback_only, &capture_only);
+	graph_util_parse_link_direction(ep_codec,	&playback_only, &capture_only);
+
+	of_property_read_u32(top,		"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(ports_cpu,		"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(ports_codec,	"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(port_cpu,		"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(port_codec,	"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(ep_cpu,		"mclk-fs", &dai_props->mclk_fs);
+	of_property_read_u32(ep_codec,		"mclk-fs", &dai_props->mclk_fs);
+
+	graph_util_parse_trigger_order(priv, top,		&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, ports_cpu,		&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, ports_codec,	&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, port_cpu,		&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, port_cpu,		&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, ep_cpu,		&trigger_start, &trigger_stop);
+	graph_util_parse_trigger_order(priv, ep_codec,		&trigger_start, &trigger_stop);
+
+	dai_link->playback_only	= playback_only;
+	dai_link->capture_only	= capture_only;
+
+	dai_link->trigger_start	= trigger_start;
+	dai_link->trigger_stop	= trigger_stop;
+
+	dai_link->init		= simple_util_dai_init;
+	dai_link->ops		= &graph_ops;
+	if (priv->ops)
+		dai_link->ops	= priv->ops;
+
+	ret = simple_util_set_dailink_name(priv, dai_link, name);
+end:
+	return graph_ret(priv, ret);
+}
+
+static int graph_dai_link_of_dpcm(struct simple_util_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 = snd_soc_link_to_cpu(dai_link, 0);
+		struct snd_soc_dai_link_component *platforms = snd_soc_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)
+			goto end;
+
+		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 = simple_util_be_hw_params_fixup;
+		}
+
+		simple_util_canonicalize_cpu(cpus, is_single_links);
+		simple_util_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 = snd_soc_link_to_codec(dai_link, 0);
+
+		/* CPU is dummy */
+
+		/* BE settings */
+		dai_link->no_pcm		= 1;
+		dai_link->be_hw_params_fixup	= simple_util_be_hw_params_fixup;
+
+		ret = graph_parse_node(priv, codec_ep, li, NULL);
+		if (ret < 0)
+			goto end;
+
+		snprintf(dai_name, sizeof(dai_name),
+			 "be.%pOFP.%s", codecs->of_node, codecs->dai_name);
+
+		/* check "prefix" from top node */
+		struct device_node *port  __free(device_node) = ep_to_port(ep);
+		struct device_node *ports __free(device_node) = port_to_ports(port);
+
+		snd_soc_of_parse_node_prefix(top,   cconf, codecs->of_node, "prefix");
+		snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
+		snd_soc_of_parse_node_prefix(port,  cconf, codecs->of_node, "prefix");
 	}
 
-	ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
-					    NULL, &dai_link->dai_fmt);
-	if (ret < 0)
-		goto dai_link_of_err;
+	graph_parse_convert(dev, ep, &dai_props->adata);
 
-	/*
-	 * we need to consider "mclk-fs" around here
-	 * see simple-card
-	 */
+	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
 
-	ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
-	if (ret < 0)
-		goto dai_link_of_err;
+	li->link++;
+end:
+	return graph_ret(priv, ret);
+}
 
-	ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
-	if (ret < 0)
-		goto dai_link_of_err;
+static int graph_dai_link_of(struct simple_util_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 = snd_soc_link_to_cpu(dai_link, 0);
+	struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
+	struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
+	char dai_name[64];
+	int ret, is_single_links = 0;
 
-	ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai);
-	if (ret < 0)
-		goto dai_link_of_err;
+	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
 
-	ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai);
+	ret = graph_parse_node(priv, cpu_ep, li, &is_single_links);
 	if (ret < 0)
-		goto dai_link_of_err;
+		goto end;
 
-	ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
+	ret = graph_parse_node(priv, codec_ep, li, NULL);
 	if (ret < 0)
-		goto dai_link_of_err;
+		goto end;
 
-	ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
-	if (ret < 0)
-		goto dai_link_of_err;
+	snprintf(dai_name, sizeof(dai_name),
+		 "%s-%s", cpus->dai_name, codecs->dai_name);
 
-	ret = asoc_simple_card_canonicalize_dailink(dai_link);
-	if (ret < 0)
-		goto dai_link_of_err;
+	simple_util_canonicalize_cpu(cpus, is_single_links);
+	simple_util_canonicalize_platform(platforms, cpus);
 
-	ret = asoc_simple_card_set_dailink_name(dev, dai_link,
-						"%s-%s",
-						dai_link->cpu_dai_name,
-						dai_link->codec_dai_name);
+	ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
 	if (ret < 0)
-		goto dai_link_of_err;
+		goto end;
 
-	dai_link->ops = &asoc_graph_card_ops;
-	dai_link->init = asoc_graph_card_dai_init;
+	li->link++;
+end:
+	return graph_ret(priv, ret);
+}
 
-	asoc_simple_card_canonicalize_cpu(dai_link,
-		of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
+static inline bool parse_as_dpcm_link(struct simple_util_priv *priv,
+				      struct device_node *codec_port,
+				      struct simple_util_data *adata)
+{
+	if (priv->force_dpcm)
+		return true;
 
-dai_link_of_err:
-	of_node_put(cpu_ep);
-	of_node_put(rcpu_ep);
-	of_node_put(codec_ep);
+	if (!priv->dpcm_selectable)
+		return false;
 
-	return ret;
+	/*
+	 * It is DPCM
+	 * if Codec port has many endpoints,
+	 * or has convert-xxx property
+	 */
+	if ((of_get_child_count(codec_port) > 1) ||
+	    simple_util_is_convert_required(adata))
+		return true;
+
+	return false;
 }
 
-static int asoc_graph_card_parse_of(struct graph_card_data *priv)
+static int __graph_for_each_link(struct simple_util_priv *priv,
+			struct link_info *li,
+			int (*func_noml)(struct simple_util_priv *priv,
+					 struct device_node *cpu_ep,
+					 struct device_node *codec_ep,
+					 struct link_info *li),
+			int (*func_dpcm)(struct simple_util_priv *priv,
+					 struct device_node *cpu_ep,
+					 struct device_node *codec_ep,
+					 struct link_info *li))
 {
 	struct of_phandle_iterator it;
-	struct device *dev = graph_priv_to_dev(priv);
-	struct snd_soc_card *card = graph_priv_to_card(priv);
+	struct device *dev = simple_priv_to_dev(priv);
 	struct device_node *node = dev->of_node;
-	int rc, idx = 0;
+	struct device_node *cpu_port;
+	struct device_node *codec_port_old = NULL;
+	struct simple_util_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;
+
+		/* loop for all CPU endpoint */
+		for_each_of_graph_port_endpoint(cpu_port, cpu_ep) {
+			/* get codec */
+			struct device_node *codec_ep   __free(device_node) = of_graph_get_remote_endpoint(cpu_ep);
+			struct device_node *codec_port __free(device_node) = ep_to_port(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);
+			}
+
+			if (ret < 0)
+				goto end;
+
+			codec_port_old = codec_port;
+		}
+	}
+end:
+	return graph_ret(priv, ret);
+}
+
+static int graph_for_each_link(struct simple_util_priv *priv,
+			       struct link_info *li,
+			       int (*func_noml)(struct simple_util_priv *priv,
+						struct device_node *cpu_ep,
+						struct device_node *codec_ep,
+						struct link_info *li),
+			       int (*func_dpcm)(struct simple_util_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;
+	}
 
-	ret = asoc_simple_card_of_parse_widgets(card, NULL);
-	if (ret < 0)
-		return ret;
+	return graph_ret(priv, ret);
+}
 
-	ret = asoc_simple_card_of_parse_routing(card, NULL, 1);
-	if (ret < 0)
-		return ret;
+static int graph_count_noml(struct simple_util_priv *priv,
+			    struct device_node *cpu_ep,
+			    struct device_node *codec_ep,
+			    struct link_info *li)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	int ret = -EINVAL;
+
+	if (li->link >= SNDRV_MAX_LINKS)
+		goto end;
 
 	/*
-	 * we need to consider "mclk-fs" around here
-	 * see simple-card
+	 * DON'T REMOVE platforms
+	 * see
+	 *	simple-card.c :: simple_count_noml()
 	 */
+	li->num[li->link].cpus		= 1;
+	li->num[li->link].platforms     = 1;
 
-	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
-		ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
-		if (ret < 0) {
-			of_node_put(it.node);
+	li->num[li->link].codecs	= 1;
 
-			return ret;
-		}
-	}
+	li->link += 1; /* 1xCPU-Codec */
 
-	return asoc_simple_card_parse_card_name(card, NULL);
+	dev_dbg(dev, "Count As Normal\n");
+	ret = 0;
+end:
+	return graph_ret(priv, ret);
 }
 
-static int asoc_graph_get_dais_count(struct device *dev)
+static int graph_count_dpcm(struct simple_util_priv *priv,
+			    struct device_node *cpu_ep,
+			    struct device_node *codec_ep,
+			    struct link_info *li)
 {
-	struct of_phandle_iterator it;
-	struct device_node *node = dev->of_node;
-	int count = 0;
-	int rc;
+	struct device *dev = simple_priv_to_dev(priv);
+	int ret = -EINVAL;
+
+	if (li->link >= SNDRV_MAX_LINKS)
+		goto end;
+
+	if (li->cpu) {
+		/*
+		 * DON'T REMOVE platforms
+		 * see
+		 *	simple-card.c :: simple_count_noml()
+		 */
+		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 */
+	}
 
-	of_for_each_phandle(&it, rc, node, "dais", NULL, 0)
-		count++;
+	dev_dbg(dev, "Count As DPCM\n");
+	ret = 0;
+end:
+	return graph_ret(priv, ret);
+}
 
-	return count;
+static int graph_get_dais_count(struct simple_util_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 asoc_graph_card_probe(struct platform_device *pdev)
+int audio_graph_parse_of(struct simple_util_priv *priv, struct device *dev)
 {
-	struct graph_card_data *priv;
-	struct snd_soc_dai_link *dai_link;
-	struct graph_dai_props *dai_props;
-	struct device *dev = &pdev->dev;
-	struct snd_soc_card *card;
-	int num, ret;
+	struct snd_soc_card *card = simple_priv_to_card(priv);
+	int ret = -ENOMEM;
 
-	/* Allocate the private data and the DAI link array */
-	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
+	struct link_info *li __free(kfree) = kzalloc(sizeof(*li), GFP_KERNEL);
+	if (!li)
+		goto end;
 
-	num = asoc_graph_get_dais_count(dev);
-	if (num == 0)
-		return -EINVAL;
+	card->owner = THIS_MODULE;
+	card->dev = dev;
 
-	dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
-	dai_link  = devm_kzalloc(dev, sizeof(*dai_link)  * num, GFP_KERNEL);
-	if (!dai_props || !dai_link)
-		return -ENOMEM;
+	ret = graph_get_dais_count(priv, li);
+	if (ret < 0)
+		goto end;
+
+	ret = -EINVAL;
+	if (!li->link)
+		goto end;
+
+	ret = simple_util_init_priv(priv, li);
+	if (ret < 0)
+		goto end;
 
 	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;
+		goto end;
 	}
 
-	priv->dai_props			= dai_props;
-	priv->dai_link			= dai_link;
-
-	/* Init snd_soc_card */
-	card = graph_priv_to_card(priv);
-	card->owner	= THIS_MODULE;
-	card->dev	= dev;
-	card->dai_link	= dai_link;
-	card->num_links	= num;
-	card->dapm_widgets = asoc_graph_card_dapm_widgets;
-	card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets);
-
-	ret = asoc_graph_card_parse_of(priv);
-	if (ret < 0) {
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "parse error %d\n", ret);
+	ret = simple_util_parse_widgets(card, NULL);
+	if (ret < 0)
+		goto end;
+
+	ret = simple_util_parse_routing(card, NULL);
+	if (ret < 0)
+		goto end;
+
+	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 = simple_util_parse_card_name(priv, NULL);
+	if (ret < 0)
 		goto err;
-	}
 
 	snd_soc_card_set_drvdata(card, priv);
 
+	simple_util_debug_info(priv);
+
 	ret = devm_snd_soc_register_card(dev, card);
 	if (ret < 0)
 		goto err;
 
 	return 0;
 err:
-	asoc_simple_card_clean_reference(card);
-
-	return ret;
+	simple_util_clean_reference(card);
+end:
+	return dev_err_probe(dev, ret, "parse error\n");
 }
+EXPORT_SYMBOL_GPL(audio_graph_parse_of);
 
-static int asoc_graph_card_remove(struct platform_device *pdev)
+static int graph_probe(struct platform_device *pdev)
 {
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct simple_util_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		= graph_util_card_probe;
+
+	if (of_device_get_match_data(dev))
+		priv->dpcm_selectable = 1;
 
-	return asoc_simple_card_clean_reference(card);
+	return audio_graph_parse_of(priv, dev);
 }
 
-static const struct of_device_id asoc_graph_of_match[] = {
+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, asoc_graph_of_match);
+MODULE_DEVICE_TABLE(of, graph_of_match);
 
-static struct platform_driver asoc_graph_card = {
+static struct platform_driver graph_card = {
 	.driver = {
 		.name = "asoc-audio-graph-card",
-		.of_match_table = asoc_graph_of_match,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = graph_of_match,
 	},
-	.probe = asoc_graph_card_probe,
-	.remove = asoc_graph_card_remove,
+	.probe = graph_probe,
+	.remove = simple_util_remove,
 };
-module_platform_driver(asoc_graph_card);
+module_platform_driver(graph_card);
 
 MODULE_ALIAS("platform:asoc-audio-graph-card");
 MODULE_LICENSE("GPL v2");