diff --git a/src/audio/dai.c b/src/audio/dai.c
index c909b54b8..fab6f3601 100644
--- a/src/audio/dai.c
+++ b/src/audio/dai.c
@@ -73,9 +73,6 @@ static void dai_dma_cb(void *arg, enum notify_id type, void *data)
 	struct comp_dev *dev = arg;
 	struct dai_data *dd = comp_get_drvdata(dev);
 	uint32_t bytes = next->elem.size;
-	uint32_t sink_bytes;
-	uint32_t samples = bytes /
-			   audio_stream_sample_bytes(&dd->dma_buffer->stream);
 	void *buffer_ptr;
 
 	comp_dbg(dev, "dai_dma_cb()");
@@ -101,18 +98,14 @@ static void dai_dma_cb(void *arg, enum notify_id type, void *data)
 		return;
 	}
 
-	sink_bytes = samples *
-		     audio_stream_sample_bytes(&dd->local_buffer->stream);
-
 	if (dev->direction == SOF_IPC_STREAM_PLAYBACK) {
-		dma_buffer_copy_to(dd->local_buffer, sink_bytes,
-				   dd->dma_buffer, bytes,
-				   dd->process, samples);
+		dma_buffer_copy_to(dd->local_buffer, dd->dma_buffer,
+				   dd->process, bytes);
 
 		buffer_ptr = dd->local_buffer->stream.r_ptr;
 	} else {
-		dma_buffer_copy_from(dd->dma_buffer, bytes, dd->local_buffer,
-				     sink_bytes, dd->process, samples);
+		dma_buffer_copy_from(dd->dma_buffer, dd->local_buffer,
+				     dd->process, bytes);
 
 		buffer_ptr = dd->local_buffer->stream.w_ptr;
 	}
diff --git a/src/audio/host.c b/src/audio/host.c
index aa3ebbac7..5d664e0cc 100644
--- a/src/audio/host.c
+++ b/src/audio/host.c
@@ -130,18 +130,13 @@ static uint32_t host_dma_get_split(struct host_data *hd, uint32_t bytes)
 static void host_update_position(struct comp_dev *dev, uint32_t bytes)
 {
 	struct host_data *hd = comp_get_drvdata(dev);
-	uint32_t samples;
-
-	samples = bytes / audio_stream_sample_bytes(&hd->local_buffer->stream);
 
 	if (dev->direction == SOF_IPC_STREAM_PLAYBACK)
-		dma_buffer_copy_from(hd->dma_buffer, bytes,
-				     hd->local_buffer, bytes,
-				     hd->process, samples);
+		dma_buffer_copy_from(hd->dma_buffer, hd->local_buffer,
+				     hd->process, bytes);
 	else
-		dma_buffer_copy_to(hd->local_buffer, bytes,
-				   hd->dma_buffer, bytes,
-				   hd->process, samples);
+		dma_buffer_copy_to(hd->local_buffer, hd->dma_buffer,
+				   hd->process, bytes);
 
 	dev->position += bytes;
 
diff --git a/src/include/sof/lib/dma.h b/src/include/sof/lib/dma.h
index bf0b59575..ef5383498 100644
--- a/src/include/sof/lib/dma.h
+++ b/src/include/sof/lib/dma.h
@@ -607,14 +607,12 @@ typedef void (*dma_process)(const struct audio_stream *,
 			    struct audio_stream *, uint32_t);
 
 /* copies data from DMA buffer using provided processing function */
-void dma_buffer_copy_from(struct comp_buffer *source, uint32_t source_bytes,
-			  struct comp_buffer *sink, uint32_t sink_bytes,
-			  dma_process_func process, uint32_t samples);
+void dma_buffer_copy_from(struct comp_buffer *source, struct comp_buffer *sink,
+			  dma_process_func process, uint32_t source_bytes);
 
 /* copies data to DMA buffer using provided processing function */
-void dma_buffer_copy_to(struct comp_buffer *source, uint32_t source_bytes,
-			struct comp_buffer *sink, uint32_t sink_bytes,
-			dma_process_func process, uint32_t samples);
+void dma_buffer_copy_to(struct comp_buffer *source, struct comp_buffer *sink,
+			dma_process_func process, uint32_t sink_bytes);
 
 /* generic DMA DSP <-> Host copier */
 
diff --git a/src/lib/dma.c b/src/lib/dma.c
index fb7e76573..936484b45 100644
--- a/src/lib/dma.c
+++ b/src/lib/dma.c
@@ -189,11 +189,14 @@ void dma_sg_free(struct dma_sg_elem_array *elem_array)
 	dma_sg_init(elem_array);
 }
 
-void dma_buffer_copy_from(struct comp_buffer *source, uint32_t source_bytes,
-			  struct comp_buffer *sink, uint32_t sink_bytes,
-			  dma_process_func process, uint32_t samples)
+void dma_buffer_copy_from(struct comp_buffer *source, struct comp_buffer *sink,
+			  dma_process_func process, uint32_t source_bytes)
 {
 	struct audio_stream *istream = &source->stream;
+	uint32_t samples = source_bytes /
+			   audio_stream_sample_bytes(istream);
+	uint32_t sink_bytes = audio_stream_sample_bytes(&sink->stream) *
+			      samples;
 
 	/* source buffer contains data copied by DMA */
 	audio_stream_invalidate(istream, source_bytes);
@@ -209,11 +212,14 @@ void dma_buffer_copy_from(struct comp_buffer *source, uint32_t source_bytes,
 	comp_update_buffer_produce(sink, sink_bytes);
 }
 
-void dma_buffer_copy_to(struct comp_buffer *source, uint32_t source_bytes,
-			struct comp_buffer *sink, uint32_t sink_bytes,
-			dma_process_func process, uint32_t samples)
+void dma_buffer_copy_to(struct comp_buffer *source, struct comp_buffer *sink,
+			dma_process_func process, uint32_t sink_bytes)
 {
 	struct audio_stream *ostream = &sink->stream;
+	uint32_t samples = sink_bytes /
+			   audio_stream_sample_bytes(ostream);
+	uint32_t source_bytes = audio_stream_sample_bytes(&source->stream) *
+			      samples;
 
 	buffer_invalidate(source, source_bytes);