[RFC PATCH 3/4] ASoC: dmaengine_pcm: expose functions to header file for custom functions

[Michael Sit Wei Hong]

Moving some functions to the header file to be used by custom prepare and
submit function.

In the Intel KeemBay solution, there is a DMA limitation which requires
a custom prepare and submit function to modify the number of blocks per
linked link.

This patch exposes some of the functions used in the pcm_dmaengine.c to
be used by the custom function.

Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit at intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 include/sound/dmaengine_pcm.h | 15 +++++++++++++++
 sound/core/pcm_dmaengine.c    | 16 ++--------------
 2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 9fae56d39ae2..d45652a27f73 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -174,8 +174,23 @@ struct dmaengine_pcm {
 	unsigned int flags;
 };
 
+struct dmaengine_pcm_runtime_data {
+	struct dma_chan *dma_chan;
+	dma_cookie_t cookie;
+
+	unsigned int pos;
+};
+
+static inline struct dmaengine_pcm_runtime_data *substream_to_prtd(
+	const struct snd_pcm_substream *substream)
+{
+	return substream->runtime->private_data;
+}
+
 static inline struct dmaengine_pcm *soc_component_to_pcm(struct snd_soc_component *p)
 {
 	return container_of(p, struct dmaengine_pcm, component);
 }
+
+void dmaengine_pcm_dma_complete(void *arg);
 #endif
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c
index cbd1429de509..0f99c63964ec 100644
--- a/sound/core/pcm_dmaengine.c
+++ b/sound/core/pcm_dmaengine.c
@@ -19,19 +19,6 @@
 
 #include <sound/dmaengine_pcm.h>
 
-struct dmaengine_pcm_runtime_data {
-	struct dma_chan *dma_chan;
-	dma_cookie_t cookie;
-
-	unsigned int pos;
-};
-
-static inline struct dmaengine_pcm_runtime_data *substream_to_prtd(
-	const struct snd_pcm_substream *substream)
-{
-	return substream->runtime->private_data;
-}
-
 struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
 {
 	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
@@ -128,7 +115,7 @@ void snd_dmaengine_pcm_set_config_from_dai_data(
 }
 EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_set_config_from_dai_data);
 
-static void dmaengine_pcm_dma_complete(void *arg)
+void dmaengine_pcm_dma_complete(void *arg)
 {
 	struct snd_pcm_substream *substream = arg;
 	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
@@ -139,6 +126,7 @@ static void dmaengine_pcm_dma_complete(void *arg)
 
 	snd_pcm_period_elapsed(substream);
 }
+EXPORT_SYMBOL_GPL(dmaengine_pcm_dma_complete);
 
 static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
 {
-- 
2.17.1