[PATCH v2 1/7] ASoC: soc-component: Add snd_soc_pcm_component_ack

[Shengjiu Wang]

Add snd_soc_pcm_component_ack back, which can be used to get updated
buffer pointer in platform driver.
On Asymmetric multiprocessor, this pointer can be sent to Cortex-M
core for audio processing.

Signed-off-by: Shengjiu Wang <shengjiu.w...@nxp.com>
---
 include/sound/soc-component.h |  3 +++
 sound/soc/soc-component.c     | 14 ++++++++++++++
 sound/soc/soc-pcm.c           |  2 ++
 3 files changed, 19 insertions(+)

diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 5b47768222b7..2dc8c7e3d1a6 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -146,6 +146,8 @@ struct snd_soc_component_driver {
        int (*mmap)(struct snd_soc_component *component,
                    struct snd_pcm_substream *substream,
                    struct vm_area_struct *vma);
+       int (*ack)(struct snd_soc_component *component,
+                  struct snd_pcm_substream *substream);
 
        const struct snd_compress_ops *compress_ops;
 
@@ -498,5 +500,6 @@ int snd_soc_pcm_component_pm_runtime_get(struct 
snd_soc_pcm_runtime *rtd,
                                         void *stream);
 void snd_soc_pcm_component_pm_runtime_put(struct snd_soc_pcm_runtime *rtd,
                                          void *stream, int rollback);
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream);
 
 #endif /* __SOC_COMPONENT_H */
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index 159bf88b9f8c..a9fbb2d26412 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -1212,3 +1212,17 @@ void snd_soc_pcm_component_pm_runtime_put(struct 
snd_soc_pcm_runtime *rtd,
                soc_component_mark_pop(component, stream, pm);
        }
 }
+
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+       struct snd_soc_component *component;
+       int i;
+
+       /* FIXME: use 1st pointer */
+       for_each_rtd_components(rtd, i, component)
+               if (component->driver->ack)
+                       return component->driver->ack(component, substream);
+
+       return 0;
+}
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index b79f064887d4..605acec48971 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2830,6 +2830,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
                        rtd->ops.page           = snd_soc_pcm_component_page;
                if (drv->mmap)
                        rtd->ops.mmap           = snd_soc_pcm_component_mmap;
+               if (drv->ack)
+                       rtd->ops.ack            = snd_soc_pcm_component_ack;
        }
 
        if (playback)
-- 
2.27.0