[Sound-open-firmware] [PATCH v3 26/27] host: create host_elements_reset() and host_pointer_reset() for common use

[Keyon Jie]

The elements reset code may be shared by params() and stop(),
and the host side pointer resetting code may be used by both
reset() and stop().

Here create separate functions for those common codes, to make
code more clean.

Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
---
 src/audio/host.c | 90 ++++++++++++++++++++++++++------------------------------
 1 file changed, 41 insertions(+), 49 deletions(-)

diff --git a/src/audio/host.c b/src/audio/host.c
index b55415e..d71c010 100644
--- a/src/audio/host.c
+++ b/src/audio/host.c
@@ -498,12 +498,39 @@ unwind:
 	return -ENOMEM;
 }
 
+static int host_elements_reset(struct comp_dev *dev)
+{
+	struct host_data *hd = comp_get_drvdata(dev);
+	struct dma_sg_elem *source_elem, *sink_elem, *local_elem;
+
+	/* setup elem to point to first source elem */
+	source_elem = list_first_item(&hd->source->elem_list,
+		struct dma_sg_elem, list);
+	hd->source->current = &source_elem->list;
+	hd->source->current_end = source_elem->src + source_elem->size;
+
+	/* setup elem to point to first sink elem */
+	sink_elem = list_first_item(&hd->sink->elem_list,
+		struct dma_sg_elem, list);
+	hd->sink->current = &sink_elem->list;
+	hd->sink->current_end = sink_elem->dest + sink_elem->size;
+
+	/* local element */
+	local_elem = list_first_item(&hd->config.elem_list,
+		struct dma_sg_elem, list);
+	local_elem->dest = sink_elem->dest;
+	local_elem->size = hd->period->size;
+	local_elem->src = source_elem->src;
+	hd->next_inc = hd->period->size;
+
+	return 0;
+}
+
 /* configure the DMA params and descriptors for host buffer IO */
 static int host_params(struct comp_dev *dev, struct stream_params *params)
 {
 	struct host_data *hd = comp_get_drvdata(dev);
 	struct dma_sg_config *config = &hd->config;
-	struct dma_sg_elem *source_elem, *sink_elem, *local_elem;
 	int err;
 
 	/* set params */
@@ -548,25 +575,7 @@ static int host_params(struct comp_dev *dev, struct stream_params *params)
 	config->dest_width = sizeof(uint32_t);
 	config->cyclic = 0;
 
-	/* setup elem to point to first source elem */
-	source_elem = list_first_item(&hd->source->elem_list,
-		struct dma_sg_elem, list);
-	hd->source->current = &source_elem->list;
-	hd->source->current_end = source_elem->src + source_elem->size;
-
-	/* setup elem to point to first sink elem */
-	sink_elem = list_first_item(&hd->sink->elem_list,
-		struct dma_sg_elem, list);
-	hd->sink->current = &sink_elem->list;
-	hd->sink->current_end = sink_elem->dest + sink_elem->size;
-
-	/* local element */
-	local_elem = list_first_item(&hd->config.elem_list,
-		struct dma_sg_elem, list);
-	local_elem->dest = sink_elem->dest;
-	local_elem->size = hd->period->size;
-	local_elem->src = source_elem->src;
-	hd->next_inc = hd->period->size;
+	host_elements_reset(dev);
 	return 0;
 }
 
@@ -652,10 +661,9 @@ static struct comp_dev* host_volume_component(struct comp_dev *host)
 	return comp_dev;
 }
 
-static int host_stop(struct comp_dev *dev)
+static int host_pointer_reset(struct comp_dev *dev)
 {
 	struct host_data *hd = comp_get_drvdata(dev);
-	struct dma_sg_elem *source_elem, *sink_elem, *local_elem;
 
 	/* reset buffer pointers */
 	if (hd->host_pos)
@@ -663,30 +671,19 @@ static int host_stop(struct comp_dev *dev)
 	hd->host_app_pos = 0;
 	hd->host_pos_read = 0;
 	hd->host_period_pos = 0;
-	host_update_buffer_consume(hd);
-
-	/* reset buffer pointers and local_elem, to let next start
-	   from original one */
+	hd->host_size = 0;
+	hd->host_avail= 0;
 
-	/* setup elem to point to first source elem */
-	source_elem = list_first_item(&hd->source->elem_list,
-					struct dma_sg_elem, list);
-	hd->source->current = &source_elem->list;
-	hd->source->current_end = source_elem->src + source_elem->size;
+	return 0;
+}
 
-	/* setup elem to point to first sink elem */
-	sink_elem = list_first_item(&hd->sink->elem_list,
-					struct dma_sg_elem, list);
-	hd->sink->current = &sink_elem->list;
-	hd->sink->current_end = sink_elem->dest + sink_elem->size;
+static int host_stop(struct comp_dev *dev)
+{
+	/* reset host side buffer pointers */
+	host_pointer_reset(dev);
 
-	/* local element */
-	local_elem = list_first_item(&hd->config.elem_list,
-					struct dma_sg_elem, list);
-	local_elem->dest = sink_elem->dest;
-	local_elem->size = hd->period->size;
-	local_elem->src = source_elem->src;
-	hd->next_inc = hd->period->size;
+	/* reset elements, to let next start from original one */
+	host_elements_reset(dev);
 
 	/* now reset downstream buffer */
 	comp_buffer_reset(dev);
@@ -786,15 +783,10 @@ static int host_reset(struct comp_dev *dev)
 		rfree(RZONE_MODULE, RMOD_SYS, e);
 	}
 
-	hd->host_size = 0;
-	hd->host_avail= 0;
-	if (hd->host_pos)
-		*hd->host_pos = 0;
+	host_pointer_reset(dev);
 	hd->host_pos = NULL;
-	hd->host_app_pos = 0;
 
 	hd->host_period_bytes = 0;
-	hd->host_pos_read = 0;
 	hd->source = NULL;
 	hd->sink = NULL;
 	dev->state = COMP_STATE_INIT;
-- 
2.7.4