ASoC: add Component level pcm_new/pcm_free

In current ALSA SoC, Platform only has pcm_new/pcm_free feature,
but it should be supported on Component level. This patch adds it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -785,6 +785,10 @@ 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 *);
+
 	/* DT */
 	int (*of_xlate_dai_name)(struct snd_soc_component *component,
 				 struct of_phandle_args *args,
@@ -858,6 +862,8 @@ 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_pcm_runtime *);
+	void (*pcm_free)(struct snd_pcm *);
 
 	/* machine specific init */
 	int (*init)(struct snd_soc_component *component);

sound/soc/soc-core.c

@@ -2976,6 +2976,8 @@ static int snd_soc_component_initialize(struct snd_soc_component *component,
 	component->remove = component->driver->remove;
 	component->suspend = component->driver->suspend;
 	component->resume = component->driver->resume;
+	component->pcm_new = component->driver->pcm_new;
+	component->pcm_free= component->driver->pcm_free;
 
 	dapm = &component->dapm;
 	dapm->dev = dev;
@@ -3158,6 +3160,21 @@ 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_pcm_runtime *rtd)
+{
+	struct snd_soc_platform *platform = rtd->platform;
+
+	return platform->driver->pcm_new(rtd);
+}
+
+static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
+	struct snd_soc_platform *platform = rtd->platform;
+
+	platform->driver->pcm_free(pcm);
+}
+
 /**
  * snd_soc_add_platform - Add a platform to the ASoC core
  * @dev: The parent device for the platform
@@ -3181,6 +3198,10 @@ 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

@@ -2640,12 +2640,25 @@ static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
 	return ret;
 }
 
+static void soc_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
+	struct snd_soc_component *component;
+
+	list_for_each_entry(component, &rtd->card->component_dev_list,
+			    card_list) {
+		if (component->pcm_free)
+			component->pcm_free(pcm);
+	}
+}
+
 /* create a new pcm */
 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_pcm *pcm;
 	char new_name[64];
 	int ret = 0, playback = 0, capture = 0;
@@ -2754,17 +2767,18 @@ 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);
+	list_for_each_entry(component, &rtd->card->component_dev_list, card_list) {
+		if (component->pcm_new) {
+			ret = component->pcm_new(rtd);
 			if (ret < 0) {
-			dev_err(platform->dev,
+				dev_err(component->dev,
 					"ASoC: pcm constructor failed: %d\n",
 					ret);
 				return ret;
 			}
 		}
-
-	pcm->private_free = platform->driver->pcm_free;
+	}
+	pcm->private_free = soc_pcm_free;
 out:
 	dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
 		 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,