[PATCH v2 1/1] ASoC: soc-component: add snd_soc_component_ack()

["Gyeongtaek Lee" <gt82.lee@xxxxxxxxxxx>]

Current ALSA SoC is directly using component->driver->ops->xxx,
thus, it is deep nested, and makes code difficult to read,
and is not good for encapsulation.
This patch adds new snd_soc_component_ack() and use it.
Ack callback is revived because some ASoC driver is using it.

Signed-off-by: Gyeongtaek Lee <gt82.lee@xxxxxxxxxxx>
---
 include/sound/soc-component.h |  1 +
 sound/soc/soc-component.c     | 18 ++++++++++++++++++
 sound/soc/soc-pcm.c           |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 5d80b2eef525..50b079272b47 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -381,6 +381,7 @@ struct page *snd_soc_pcm_component_page(struct snd_pcm_substream *substream,
 					unsigned long offset);
 int snd_soc_pcm_component_mmap(struct snd_pcm_substream *substream,
 			       struct vm_area_struct *vma);
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream);
 int snd_soc_pcm_component_new(struct snd_pcm *pcm);
 void snd_soc_pcm_component_free(struct snd_pcm *pcm);
 
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index 79ffc2820ba9..b4be91cb9fa0 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -526,6 +526,24 @@ int snd_soc_pcm_component_mmap(struct snd_pcm_substream *substream,
 	return -EINVAL;
 }
 
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* FIXME. it returns 1st ack now */
+		if (component->driver->ops &&
+		    component->driver->ops->ack)
+			return component->driver->ops->ack(substream);
+	}
+
+	return -EINVAL;
+}
+
 int snd_soc_pcm_component_new(struct snd_pcm *pcm)
 {
 	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index b600d3eaaf5c..c8a5a9a9d35f 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2941,6 +2941,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		if (!ops)
 			continue;
 
+		if (ops->ack)
+			rtd->ops.ack		= snd_soc_pcm_component_ack;
 		if (ops->copy_user)
 			rtd->ops.copy_user	= snd_soc_pcm_component_copy_user;
 		if (ops->page)

base-commit: ef8e14794308a428b194f8b06ad9ae06b43466e4
-- 
2.21.0