From: "Dr. David Alan Gilbert" <linux@treblig.org>

snd_dmaengine_pcm_open_request_chan() last use was removed in 2022's
commit b401d1fd8053 ("ASoC: pxa: remove unused board support")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 include/sound/dmaengine_pcm.h |  2 --
 sound/core/pcm_dmaengine.c    | 21 ---------------------
 2 files changed, 23 deletions(-)

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index f6baa9a01868..1ef13bcdc43f 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -38,8 +38,6 @@ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream,
 int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream);
 int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream);
 
-int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream,
-	dma_filter_fn filter_fn, void *filter_data);
 int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream);
 
 struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn,
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c
index b134a51b3fd5..72040964b6fd 100644
--- a/sound/core/pcm_dmaengine.c
+++ b/sound/core/pcm_dmaengine.c
@@ -328,27 +328,6 @@ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream,
 }
 EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open);
 
-/**
- * snd_dmaengine_pcm_open_request_chan - Open a dmaengine based PCM substream and request channel
- * @substream: PCM substream
- * @filter_fn: Filter function used to request the DMA channel
- * @filter_data: Data passed to the DMA filter function
- *
- * This function will request a DMA channel using the passed filter function and
- * data. The function should usually be called from the pcm open callback. Note
- * that this function will use private_data field of the substream's runtime. So
- * it is not available to your pcm driver implementation.
- *
- * Return: 0 on success, a negative error code otherwise
- */
-int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream,
-	dma_filter_fn filter_fn, void *filter_data)
-{
-	return snd_dmaengine_pcm_open(substream,
-		    snd_dmaengine_pcm_request_channel(filter_fn, filter_data));
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open_request_chan);
-
 int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream)
 {
 	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-- 
2.49.0