1 files changed, 194 insertions, 79 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1a0bde23f5e6..cc442c52cdea 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -238,6 +238,81 @@ static inline void snd_soc_debugfs_exit(void) { }
 
 #endif
 
+static int snd_soc_is_match_dai_args(struct of_phandle_args *args1,
+				     struct of_phandle_args *args2)
+{
+	if (!args1 || !args2)
+		return 0;
+
+	if (args1->np != args2->np)
+		return 0;
+
+	for (int i = 0; i < args1->args_count; i++)
+		if (args1->args[i] != args2->args[i])
+			return 0;
+
+	return 1;
+}
+
+static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
+{
+	return !(dlc->dai_args || dlc->name || dlc->of_node);
+}
+
+static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
+{
+	return (dlc->name && dlc->of_node);
+}
+
+static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
+{
+	return !(dlc->dai_args || dlc->dai_name);
+}
+
+static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
+				   struct snd_soc_dai *dai)
+{
+	if (!dlc)
+		return 0;
+
+	if (dlc->dai_args)
+		return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
+
+	if (!dlc->dai_name)
+		return 1;
+
+	/* see snd_soc_dai_name_get() */
+
+	if (strcmp(dlc->dai_name, dai->name) == 0)
+		return 1;
+
+	if (dai->driver->name &&
+	    strcmp(dai->driver->name, dlc->dai_name) == 0)
+		return 1;
+
+	if (dai->component->name &&
+	    strcmp(dlc->dai_name, dai->component->name) == 0)
+		return 1;
+
+	return 0;
+}
+
+const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
+{
+	/* see snd_soc_is_matching_dai() */
+	if (dai->name)
+		return dai->name;
+
+	if (dai->driver->name)
+		return dai->driver->name;
+
+	if (dai->component->name)
+		return dai->component->name;
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
+
 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
 				     struct snd_soc_component *component)
 {
@@ -734,6 +809,19 @@ static struct device_node
 	return of_node;
 }
 
+struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
+{
+	struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
+
+	if (!ret)
+		return NULL;
+
+	*ret = *args;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
+
 static int snd_soc_is_matching_component(
 	const struct snd_soc_dai_link_component *dlc,
 	struct snd_soc_component *component)
@@ -743,6 +831,15 @@ static int snd_soc_is_matching_component(
 	if (!dlc)
 		return 0;
 
+	if (dlc->dai_args) {
+		struct snd_soc_dai *dai;
+
+		for_each_component_dais(component, dai)
+			if (snd_soc_is_matching_dai(dlc, dai))
+				return 1;
+		return 0;
+	}
+
 	component_of_node = soc_component_to_node(component);
 
 	if (dlc->of_node && component_of_node != dlc->of_node)
@@ -795,18 +892,11 @@ struct snd_soc_dai *snd_soc_find_dai(
 	lockdep_assert_held(&client_mutex);
 
 	/* Find CPU DAI from registered DAIs */
-	for_each_component(component) {
-		if (!snd_soc_is_matching_component(dlc, component))
-			continue;
-		for_each_component_dais(component, dai) {
-			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
-			    && (!dai->driver->name
-				|| strcmp(dai->driver->name, dlc->dai_name)))
-				continue;
-
-			return dai;
-		}
-	}
+	for_each_component(component)
+		if (snd_soc_is_matching_component(dlc, component))
+			for_each_component_dais(component, dai)
+				if (snd_soc_is_matching_dai(dlc, dai))
+					return dai;
 
 	return NULL;
 }
@@ -829,102 +919,100 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 				     struct snd_soc_dai_link *link)
 {
 	int i;
-	struct snd_soc_dai_link_component *cpu, *codec, *platform;
+	struct snd_soc_dai_link_component *dlc;
 
-	for_each_link_codecs(link, i, codec) {
+	/* Codec check */
+	for_each_link_codecs(link, i, dlc) {
 		/*
 		 * Codec must be specified by 1 of name or OF node,
 		 * not both or neither.
 		 */
-		if (!!codec->name == !!codec->of_node) {
-			dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
-				link->name);
-			return -EINVAL;
-		}
+		if (snd_soc_dlc_component_is_invalid(dlc))
+			goto component_invalid;
+
+		if (snd_soc_dlc_component_is_empty(dlc))
+			goto component_empty;
 
 		/* Codec DAI name must be specified */
-		if (!codec->dai_name) {
-			dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
-				link->name);
-			return -EINVAL;
-		}
+		if (snd_soc_dlc_dai_is_empty(dlc))
+			goto dai_empty;
 
 		/*
 		 * Defer card registration if codec component is not added to
 		 * component list.
 		 */
-		if (!soc_find_component(codec)) {
-			dev_dbg(card->dev,
-				"ASoC: codec component %s not found for link %s\n",
-				codec->name, link->name);
-			return -EPROBE_DEFER;
-		}
+		if (!soc_find_component(dlc))
+			goto component_not_found;
 	}
 
-	for_each_link_platforms(link, i, platform) {
+	/* Platform check */
+	for_each_link_platforms(link, i, dlc) {
 		/*
 		 * Platform may be specified by either name or OF node, but it
 		 * can be left unspecified, then no components will be inserted
 		 * in the rtdcom list
 		 */
-		if (!!platform->name == !!platform->of_node) {
-			dev_err(card->dev,
-				"ASoC: Neither/both platform name/of_node are set for %s\n",
-				link->name);
-			return -EINVAL;
-		}
+		if (snd_soc_dlc_component_is_invalid(dlc))
+			goto component_invalid;
+
+		if (snd_soc_dlc_component_is_empty(dlc))
+			goto component_empty;
 
 		/*
 		 * Defer card registration if platform component is not added to
 		 * component list.
 		 */
-		if (!soc_find_component(platform)) {
-			dev_dbg(card->dev,
-				"ASoC: platform component %s not found for link %s\n",
-				platform->name, link->name);
-			return -EPROBE_DEFER;
-		}
+		if (!soc_find_component(dlc))
+			goto component_not_found;
 	}
 
-	for_each_link_cpus(link, i, cpu) {
+	/* CPU check */
+	for_each_link_cpus(link, i, dlc) {
 		/*
 		 * CPU device may be specified by either name or OF node, but
 		 * can be left unspecified, and will be matched based on DAI
 		 * name alone..
 		 */
-		if (cpu->name && cpu->of_node) {
-			dev_err(card->dev,
-				"ASoC: Neither/both cpu name/of_node are set for %s\n",
-				link->name);
-			return -EINVAL;
-		}
+		if (snd_soc_dlc_component_is_invalid(dlc))
+			goto component_invalid;
 
-		/*
-		 * Defer card registration if cpu dai component is not added to
-		 * component list.
-		 */
-		if ((cpu->of_node || cpu->name) &&
-		    !soc_find_component(cpu)) {
-			dev_dbg(card->dev,
-				"ASoC: cpu component %s not found for link %s\n",
-				cpu->name, link->name);
-			return -EPROBE_DEFER;
-		}
 
-		/*
-		 * At least one of CPU DAI name or CPU device name/node must be
-		 * specified
-		 */
-		if (!cpu->dai_name &&
-		    !(cpu->name || cpu->of_node)) {
-			dev_err(card->dev,
-				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
-				link->name);
-			return -EINVAL;
+		if (snd_soc_dlc_component_is_empty(dlc)) {
+			/*
+			 * At least one of CPU DAI name or CPU device name/node must be specified
+			 */
+			if (snd_soc_dlc_dai_is_empty(dlc))
+				goto component_dai_empty;
+		} else {
+			/*
+			 * Defer card registration if Component is not added
+			 */
+			if (!soc_find_component(dlc))
+				goto component_not_found;
 		}
 	}
 
 	return 0;
+
+component_invalid:
+	dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
+	return -EINVAL;
+
+component_empty:
+	dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
+	return -EINVAL;
+
+component_not_found:
+	dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
+	return -EPROBE_DEFER;
+
+dai_empty:
+	dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
+	return -EINVAL;
+
+component_dai_empty:
+	dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
+	return -EINVAL;
 }
 
 /**
@@ -2930,6 +3018,14 @@ int snd_soc_of_parse_tdm_slot(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
 
+void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
+				     struct snd_soc_dai_link_component *cpus)
+{
+	platforms->of_node	= cpus->of_node;
+	platforms->dai_args	= cpus->dai_args;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
+
 void snd_soc_of_parse_node_prefix(struct device_node *np,
 				  struct snd_soc_codec_conf *codec_conf,
 				  struct device_node *of_node,
@@ -3235,11 +3331,12 @@ EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
 int snd_soc_get_dai_id(struct device_node *ep)
 {
 	struct snd_soc_component *component;
-	struct snd_soc_dai_link_component dlc;
+	struct snd_soc_dai_link_component dlc = {
+		.of_node = of_graph_get_port_parent(ep),
+	};
 	int ret;
 
-	dlc.of_node	= of_graph_get_port_parent(ep);
-	dlc.name	= NULL;
+
 	/*
 	 * For example HDMI case, HDMI has video/sound port,
 	 * but ALSA SoC needs sound port number only.
@@ -3264,8 +3361,6 @@ int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_
 	struct snd_soc_component *pos;
 	int ret = -EPROBE_DEFER;
 
-	dlc->of_node = args->np;
-
 	mutex_lock(&client_mutex);
 	for_each_component(pos) {
 		struct device_node *component_of_node = soc_component_to_node(pos);
@@ -3304,9 +3399,7 @@ int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_
 				id--;
 			}
 
-			dlc->dai_name	= dai->driver->name;
-			if (!dlc->dai_name)
-				dlc->dai_name = pos->name;
+			dlc->dai_name	= snd_soc_dai_name_get(dai);
 		} else if (ret) {
 			/*
 			 * if another error than ENOTSUPP is returned go on and
@@ -3319,6 +3412,10 @@ int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_
 
 		break;
 	}
+
+	if (ret == 0)
+		dlc->of_node = args->np;
+
 	mutex_unlock(&client_mutex);
 	return ret;
 }
@@ -3370,6 +3467,24 @@ int snd_soc_of_get_dai_name(struct device_node *of_node,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
 
+struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
+{
+	struct snd_soc_dai *dai;
+	struct snd_soc_component *component;
+
+	mutex_lock(&client_mutex);
+	for_each_component(component) {
+		for_each_component_dais(component, dai)
+			if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
+				goto found;
+	}
+	dai = NULL;
+found:
+	mutex_unlock(&client_mutex);
+	return dai;
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
+
 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
 {
 	if (component->of_node) {