ASoC: add Component level pcm_new/pcm_free v2

In current ALSA SoC, Platform only has pcm_new/pcm_free feature,
but it should be supported on Component level. This patch adds it.

The v1 was added commit 99b04f4c ("ASoC: add Component level
pcm_new/pcm_free") but it called all "card" connected component's
pcm_new/free, it was wrong.
This patch calls "rtd" connected component.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -795,6 +795,10 @@ struct snd_soc_component_driver {
 	int (*suspend)(struct snd_soc_component *);
 	int (*resume)(struct snd_soc_component *);
 
+	/* pcm creation and destruction */
+	int (*pcm_new)(struct snd_soc_pcm_runtime *);
+	void (*pcm_free)(struct snd_pcm *);
+
 	/* component wide operations */
 	int (*set_sysclk)(struct snd_soc_component *component,
 			  int clk_id, int source, unsigned int freq, int dir);
@@ -872,6 +876,8 @@ struct snd_soc_component {
 	void (*remove)(struct snd_soc_component *);
 	int (*suspend)(struct snd_soc_component *);
 	int (*resume)(struct snd_soc_component *);
+	int (*pcm_new)(struct snd_soc_component *, struct snd_soc_pcm_runtime *);
+	void (*pcm_free)(struct snd_soc_component *, struct snd_pcm *);
 
 	int (*set_sysclk)(struct snd_soc_component *component,
 			  int clk_id, int source, unsigned int freq, int dir);

sound/soc/soc-core.c

@@ -3254,6 +3254,22 @@ static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
 	return component->driver->stream_event(component, event);
 }
 
+static int snd_soc_component_drv_pcm_new(struct snd_soc_component *component,
+					struct snd_soc_pcm_runtime *rtd)
+{
+	if (component->driver->pcm_new)
+		return component->driver->pcm_new(rtd);
+
+	return 0;
+}
+
+static void snd_soc_component_drv_pcm_free(struct snd_soc_component *component,
+					  struct snd_pcm *pcm)
+{
+	if (component->driver->pcm_free)
+		component->driver->pcm_free(pcm);
+}
+
 static int snd_soc_component_initialize(struct snd_soc_component *component,
 	const struct snd_soc_component_driver *driver, struct device *dev)
 {
@@ -3274,6 +3290,8 @@ static int snd_soc_component_initialize(struct snd_soc_component *component,
 	component->set_sysclk = component->driver->set_sysclk;
 	component->set_pll = component->driver->set_pll;
 	component->set_jack = component->driver->set_jack;
+	component->pcm_new = snd_soc_component_drv_pcm_new;
+	component->pcm_free = snd_soc_component_drv_pcm_free;
 
 	dapm = snd_soc_component_get_dapm(component);
 	dapm->dev = dev;
@@ -3466,6 +3484,26 @@ static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
 	platform->driver->remove(platform);
 }
 
+static int snd_soc_platform_drv_pcm_new(struct snd_soc_component *component,
+					struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+	if (platform->driver->pcm_new)
+		return platform->driver->pcm_new(rtd);
+
+	return 0;
+}
+
+static void snd_soc_platform_drv_pcm_free(struct snd_soc_component *component,
+					  struct snd_pcm *pcm)
+{
+	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
+
+	if (platform->driver->pcm_free)
+		platform->driver->pcm_free(pcm);
+}
+
 /**
  * snd_soc_add_platform - Add a platform to the ASoC core
  * @dev: The parent device for the platform
@@ -3489,6 +3527,10 @@ int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
 		platform->component.probe = snd_soc_platform_drv_probe;
 	if (platform_drv->remove)
 		platform->component.remove = snd_soc_platform_drv_remove;
+	if (platform_drv->pcm_new)
+		platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
+	if (platform_drv->pcm_free)
+		platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
 
 #ifdef CONFIG_DEBUG_FS
 	platform->component.debugfs_prefix = "platform";

sound/soc/soc-pcm.c

@@ -2633,12 +2633,18 @@ static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
 static void soc_pcm_private_free(struct snd_pcm *pcm)
 {
 	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
-	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		/* need to sync the delayed work before releasing resources */
+
+		flush_delayed_work(&rtd->delayed_work);
+		component = rtdcom->component;
 
-	/* need to sync the delayed work before releasing resources */
-	flush_delayed_work(&rtd->delayed_work);
-	if (platform->driver->pcm_free)
-		platform->driver->pcm_free(pcm);
+		if (component->pcm_free)
+			component->pcm_free(component, pcm);
+	}
 }
 
 /* create a new pcm */
@@ -2647,6 +2653,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 	struct snd_soc_platform *platform = rtd->platform;
 	struct snd_soc_dai *codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_pcm *pcm;
 	char new_name[64];
 	int ret = 0, playback = 0, capture = 0;
@@ -2756,10 +2764,15 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 	if (capture)
 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
 
-	if (platform->driver->pcm_new) {
-		ret = platform->driver->pcm_new(rtd);
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->pcm_new)
+			continue;
+
+		ret = component->pcm_new(component, rtd);
 		if (ret < 0) {
-			dev_err(platform->dev,
+			dev_err(component->dev,
 				"ASoC: pcm constructor failed: %d\n",
 				ret);
 			return ret;