Merge branch 'topic/of-graph' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-rcar

4 files changed, 398 insertions, 7 deletions

diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
index d023959b8cd6..121a48e8bb7d 100644
--- a/sound/soc/generic/Kconfig
+++ b/sound/soc/generic/Kconfig
@@ -14,3 +14,11 @@ config SND_SIMPLE_SCU_CARD
 	help
 	  This option enables generic simple SCU sound card support.
 	  It supports DPCM of multi CPU single Codec system.
+
+config SND_AUDIO_GRAPH_CARD
+	tristate "ASoC Audio Graph sound card support"
+	depends on OF
+	select SND_SIMPLE_CARD_UTILS
+	help
+	  This option enables generic simple simple sound card support
+	  with OF-graph DT bindings.
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index ee750f3023ba..670068f257b9 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -1,7 +1,9 @@
 snd-soc-simple-card-utils-objs	:= simple-card-utils.o
 snd-soc-simple-card-objs	:= simple-card.o
 snd-soc-simple-scu-card-objs	:= simple-scu-card.o
+snd-soc-audio-graph-card-objs	:= audio-graph-card.o
 
 obj-$(CONFIG_SND_SIMPLE_CARD_UTILS)	+= snd-soc-simple-card-utils.o
 obj-$(CONFIG_SND_SIMPLE_CARD)		+= snd-soc-simple-card.o
 obj-$(CONFIG_SND_SIMPLE_SCU_CARD)	+= snd-soc-simple-scu-card.o
+obj-$(CONFIG_SND_AUDIO_GRAPH_CARD)	+= snd-soc-audio-graph-card.o
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
new file mode 100644
index 000000000000..93c167a91d2d
--- /dev/null
+++ b/sound/soc/generic/audio-graph-card.c
@@ -0,0 +1,310 @@
+/*
+ * 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.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio.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;
+};
+
+#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 int asoc_graph_card_startup(struct snd_pcm_substream *substream)
+{
+	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 = clk_prepare_enable(dai_props->cpu_dai.clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(dai_props->codec_dai.clk);
+	if (ret)
+		clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+	return ret;
+}
+
+static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream)
+{
+	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);
+
+	clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+	clk_disable_unprepare(dai_props->codec_dai.clk);
+}
+
+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)
+{
+	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);
+	int ret;
+
+	ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int asoc_graph_card_dai_link_of(struct device_node *cpu_port,
+					struct graph_card_data *priv,
+					int idx)
+{
+	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 snd_soc_card *card = graph_priv_to_card(priv);
+	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);
+	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 = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
+					    NULL, &dai_link->dai_fmt);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	/*
+	 * we need to consider "mclk-fs" around here
+	 * see simple-card
+	 */
+
+	ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = snd_soc_of_parse_tdm_slot(cpu_ep,
+					&cpu_dai->tx_slot_mask,
+					&cpu_dai->rx_slot_mask,
+					&cpu_dai->slots,
+					&cpu_dai->slot_width);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = snd_soc_of_parse_tdm_slot(codec_ep,
+					&codec_dai->tx_slot_mask,
+					&codec_dai->rx_slot_mask,
+					&codec_dai->slots,
+					&codec_dai->slot_width);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_canonicalize_dailink(dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_set_dailink_name(dev, dai_link,
+						"%s-%s",
+						dai_link->cpu_dai_name,
+						dai_link->codec_dai_name);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	dai_link->ops = &asoc_graph_card_ops;
+	dai_link->init = asoc_graph_card_dai_init;
+
+	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
+	dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
+	dev_dbg(dev, "\tcpu : %s / %d\n",
+		dai_link->cpu_dai_name,
+		cpu_dai->sysclk);
+	dev_dbg(dev, "\tcodec : %s / %d\n",
+		dai_link->codec_dai_name,
+		codec_dai->sysclk);
+
+	asoc_simple_card_canonicalize_cpu(dai_link,
+					  card->num_links == 1);
+
+dai_link_of_err:
+	of_node_put(cpu_ep);
+	of_node_put(rcpu_ep);
+	of_node_put(codec_ep);
+
+	return ret;
+}
+
+static int asoc_graph_card_parse_of(struct graph_card_data *priv)
+{
+	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_node *node = dev->of_node;
+	int rc, idx = 0;
+	int ret;
+
+	/*
+	 * we need to consider "widgets", "routing", "mclk-fs" around here
+	 * see simple-card
+	 */
+
+	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
+		ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
+		of_node_put(it.node);
+		if (ret < 0)
+			return ret;
+	}
+
+	return asoc_simple_card_parse_card_name(card, NULL);
+}
+
+static int asoc_graph_get_dais_count(struct device *dev)
+{
+	struct of_phandle_iterator it;
+	struct device_node *node = dev->of_node;
+	int count = 0;
+	int rc;
+
+	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
+		count++;
+		of_node_put(it.node);
+	}
+
+	return count;
+}
+
+static int asoc_graph_card_probe(struct platform_device *pdev)
+{
+	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;
+
+	/* Allocate the private data and the DAI link array */
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	num = asoc_graph_get_dais_count(dev);
+	if (num == 0)
+		return -EINVAL;
+
+	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;
+
+	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;
+
+	ret = asoc_graph_card_parse_of(priv);
+	if (ret < 0) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "parse error %d\n", ret);
+		goto err;
+	}
+
+	snd_soc_card_set_drvdata(card, 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;
+}
+
+static int asoc_graph_card_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	return asoc_simple_card_clean_reference(card);
+}
+
+static const struct of_device_id asoc_graph_of_match[] = {
+	{ .compatible = "audio-graph-card", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
+
+static struct platform_driver asoc_graph_card = {
+	.driver = {
+		.name = "asoc-audio-graph-card",
+		.of_match_table = asoc_graph_of_match,
+	},
+	.probe = asoc_graph_card_probe,
+	.remove = asoc_graph_card_remove,
+};
+module_platform_driver(asoc_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>");
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 343b291fc372..9c7f5b91b90a 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -10,6 +10,7 @@
 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <sound/simple_card_utils.h>
 
 int asoc_simple_card_parse_daifmt(struct device *dev,
@@ -20,14 +21,13 @@ int asoc_simple_card_parse_daifmt(struct device *dev,
 {
 	struct device_node *bitclkmaster = NULL;
 	struct device_node *framemaster = NULL;
-	int prefix_len = prefix ? strlen(prefix) : 0;
 	unsigned int daifmt;
 
 	daifmt = snd_soc_of_parse_daifmt(node, prefix,
 					 &bitclkmaster, &framemaster);
 	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 
-	if (prefix_len && !bitclkmaster && !framemaster) {
+	if (!bitclkmaster && !framemaster) {
 		/*
 		 * No dai-link level and master setting was not found from
 		 * sound node level, revert back to legacy DT parsing and
@@ -81,15 +81,21 @@ EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name);
 int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
 				     char *prefix)
 {
-	char prop[128];
 	int ret;
 
-	snprintf(prop, sizeof(prop), "%sname", prefix);
+	if (!prefix)
+		prefix = "";
 
 	/* Parse the card name from DT */
-	ret = snd_soc_of_parse_card_name(card, prop);
-	if (ret < 0)
-		return ret;
+	ret = snd_soc_of_parse_card_name(card, "label");
+	if (ret < 0) {
+		char prop[128];
+
+		snprintf(prop, sizeof(prop), "%sname", prefix);
+		ret = snd_soc_of_parse_card_name(card, prop);
+		if (ret < 0)
+			return ret;
+	}
 
 	if (!card->name && card->dai_link)
 		card->name = card->dai_link->name;
@@ -165,6 +171,71 @@ int asoc_simple_card_parse_dai(struct device_node *node,
 }
 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
 
+static int asoc_simple_card_get_dai_id(struct device_node *ep)
+{
+	struct device_node *node;
+	struct device_node *endpoint;
+	int i, id;
+	int ret;
+
+	ret = snd_soc_get_dai_id(ep);
+	if (ret != -ENOTSUPP)
+		return ret;
+
+	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++;
+	}
+	if (id < 0)
+		return -ENODEV;
+
+	return id;
+}
+
+int asoc_simple_card_parse_graph_dai(struct device_node *ep,
+				     struct device_node **dai_of_node,
+				     const char **dai_name)
+{
+	struct device_node *node;
+	struct of_phandle_args args;
+	int ret;
+
+	if (!ep)
+		return 0;
+	if (!dai_name)
+		return 0;
+
+	/*
+	 * of_graph_get_port_parent() will call
+	 * of_node_put(). So, call of_node_get() here
+	 */
+	of_node_get(ep);
+	node = of_graph_get_port_parent(ep);
+
+	/* Get dai->name */
+	args.np		= node;
+	args.args[0]	= asoc_simple_card_get_dai_id(ep);
+	args.args_count	= (of_graph_get_endpoint_count(node) > 1);
+
+	ret = snd_soc_get_dai_name(&args, dai_name);
+	if (ret < 0)
+		return ret;
+
+	*dai_of_node = node;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_graph_dai);
+
 int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
 			      struct asoc_simple_dai *simple_dai)
 {