ASoC: use snd_soc_rtdcom_add() and convert to consistent operation

Basically, current ALSA SoC framework is based on CPU/Codec/Platform,
but its operation doesn't have consistent.
Thus, source code was unreadable, and difficult to understand.
This patch connects each component (= CPU/Codec/Platform) to rtd by
using snd_soc_rtdcom_add(), and convert uneven operations to consistent
operation.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -1237,7 +1237,7 @@ struct snd_soc_pcm_runtime {
 	struct snd_pcm *pcm;
 	struct snd_compr *compr;
 	struct snd_soc_codec *codec;
-	struct snd_soc_platform *platform;
+	struct snd_soc_platform *platform; /* will be removed */
 	struct snd_soc_dai *codec_dai;
 	struct snd_soc_dai *cpu_dai;
 

sound/soc/soc-core.c

@@ -1100,6 +1100,7 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 	struct snd_soc_dai_link_component cpu_dai_component;
+	struct snd_soc_component *component;
 	struct snd_soc_dai **codec_dais;
 	struct snd_soc_platform *platform;
 	struct device_node *platform_of_node;
@@ -1127,6 +1128,7 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
 			dai_link->cpu_dai_name);
 		goto _err_defer;
 	}
+	snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
 
 	rtd->num_codecs = dai_link->num_codecs;
 
@@ -1139,6 +1141,7 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
 				codecs[i].dai_name);
 			goto _err_defer;
 		}
+		snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
 	}
 
 	/* Single codec links expect codec and codec_dai in runtime data */
@@ -1150,6 +1153,23 @@ static int soc_bind_dai_link(struct snd_soc_card *card,
 	if (!platform_name && !dai_link->platform_of_node)
 		platform_name = "snd-soc-dummy";
 
+	/* find one from the set of registered platforms */
+	list_for_each_entry(component, &component_list, list) {
+		platform_of_node = component->dev->of_node;
+		if (!platform_of_node && component->dev->parent->of_node)
+			platform_of_node = component->dev->parent->of_node;
+
+		if (dai_link->platform_of_node) {
+			if (platform_of_node != dai_link->platform_of_node)
+				continue;
+		} else {
+			if (strcmp(component->name, platform_name))
+				continue;
+		}
+
+		snd_soc_rtdcom_add(rtd, component);
+	}
+
 	/* find one from the set of registered platforms */
 	list_for_each_entry(platform, &platform_list, list) {
 		platform_of_node = platform->dev->of_node;
@@ -1235,27 +1255,15 @@ static void soc_remove_link_dais(struct snd_soc_card *card,
 static void soc_remove_link_components(struct snd_soc_card *card,
 	struct snd_soc_pcm_runtime *rtd, int order)
 {
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	struct snd_soc_platform *platform = rtd->platform;
 	struct snd_soc_component *component;
-	int i;
+	struct snd_soc_rtdcom_list *rtdcom;
 
-	/* remove the platform */
-	if (platform && platform->component.driver->remove_order == order)
-		soc_remove_component(&platform->component);
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
 
-	/* remove the CODEC-side CODEC */
-	for (i = 0; i < rtd->num_codecs; i++) {
-		component = rtd->codec_dais[i]->component;
 		if (component->driver->remove_order == order)
 			soc_remove_component(component);
 	}
-
-	/* remove any CPU-side CODEC */
-	if (cpu_dai) {
-		if (cpu_dai->component->driver->remove_order == order)
-			soc_remove_component(cpu_dai->component);
-	}
 }
 
 static void soc_remove_dai_links(struct snd_soc_card *card)
@@ -1607,21 +1615,13 @@ static int soc_probe_link_components(struct snd_soc_card *card,
 			struct snd_soc_pcm_runtime *rtd,
 				     int order)
 {
-	struct snd_soc_platform *platform = rtd->platform;
 	struct snd_soc_component *component;
-	int i, ret;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret;
 
-	/* probe the CPU-side component, if it is a CODEC */
-	component = rtd->cpu_dai->component;
-	if (component->driver->probe_order == order) {
-		ret = soc_probe_component(card, component);
-		if (ret < 0)
-			return ret;
-	}
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
 
-	/* probe the CODEC-side components */
-	for (i = 0; i < rtd->num_codecs; i++) {
-		component = rtd->codec_dais[i]->component;
 		if (component->driver->probe_order == order) {
 			ret = soc_probe_component(card, component);
 			if (ret < 0)
@@ -1629,13 +1629,6 @@ static int soc_probe_link_components(struct snd_soc_card *card,
 		}
 	}
 
-	/* probe the platform */
-	if (platform->component.driver->probe_order == order) {
-		ret = soc_probe_component(card, &platform->component);
-		if (ret < 0)
-			return ret;
-	}
-
 	return 0;
 }
 

sound/soc/soc-pcm.c

@@ -450,6 +450,8 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	const char *codec_dai_name = "multicodec";
@@ -458,10 +460,12 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	pinctrl_pm_select_default_state(cpu_dai->dev);
 	for (i = 0; i < rtd->num_codecs; i++)
 		pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
-	pm_runtime_get_sync(cpu_dai->dev);
-	for (i = 0; i < rtd->num_codecs; i++)
-		pm_runtime_get_sync(rtd->codec_dais[i]->dev);
-	pm_runtime_get_sync(platform->dev);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		pm_runtime_get_sync(component->dev);
+	}
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -599,15 +603,13 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 out:
 	mutex_unlock(&rtd->pcm_mutex);
 
-	pm_runtime_mark_last_busy(platform->dev);
-	pm_runtime_put_autosuspend(platform->dev);
-	for (i = 0; i < rtd->num_codecs; i++) {
-		pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev);
-		pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev);
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		pm_runtime_mark_last_busy(component->dev);
+		pm_runtime_put_autosuspend(component->dev);
 	}
 
-	pm_runtime_mark_last_busy(cpu_dai->dev);
-	pm_runtime_put_autosuspend(cpu_dai->dev);
 	for (i = 0; i < rtd->num_codecs; i++) {
 		if (!rtd->codec_dais[i]->active)
 			pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
@@ -655,6 +657,8 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i;
@@ -711,17 +715,13 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 
 	mutex_unlock(&rtd->pcm_mutex);
 
-	pm_runtime_mark_last_busy(platform->dev);
-	pm_runtime_put_autosuspend(platform->dev);
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
 
-	for (i = 0; i < rtd->num_codecs; i++) {
-		pm_runtime_mark_last_busy(rtd->codec_dais[i]->dev);
-		pm_runtime_put_autosuspend(rtd->codec_dais[i]->dev);
+		pm_runtime_mark_last_busy(component->dev);
+		pm_runtime_put_autosuspend(component->dev);
 	}
 
-	pm_runtime_mark_last_busy(cpu_dai->dev);
-	pm_runtime_put_autosuspend(cpu_dai->dev);
-
 	for (i = 0; i < rtd->num_codecs; i++) {
 		if (!rtd->codec_dais[i]->active)
 			pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);