[Sound-open-firmware] [PATCH 1/4] Add DMA callback for dma_copy_to_host() and dma_copy_from_host().

[yan.wang at linux.intel.com]

From: Yan Wang <yan.wang at linux.intel.com>

It is necessary to add dma callback to set completion_t variable to notify
DMA copying is finished. Otherwise it will always enter into error handler.

Signed-off-by: Yan Wang <yan.wang at linux.intel.com>
---
 src/ipc/dma-copy.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/ipc/dma-copy.c b/src/ipc/dma-copy.c
index b8d27be..d295089 100644
--- a/src/ipc/dma-copy.c
+++ b/src/ipc/dma-copy.c
@@ -64,6 +64,14 @@ static struct dma_sg_elem *sg_get_elem_at(struct dma_sg_config *host_sg,
 	return NULL;
 }
 
+static void dma_complete(void *data, uint32_t type, struct dma_sg_elem *next)
+{
+	completion_t *comp = (completion_t *)data;
+
+	if (type == DMA_IRQ_TYPE_LLIST)
+		wait_completed(comp);
+}
+
 int dma_copy_to_host(struct dma_sg_config *host_sg, int32_t host_offset,
 	void *local_ptr, int32_t size)
 {
@@ -102,6 +110,8 @@ int dma_copy_to_host(struct dma_sg_config *host_sg, int32_t host_offset,
 	local_sg_elem.size = HOST_PAGE_SIZE - offset;
 	list_item_prepend(&local_sg_elem.list, &config.elem_list);
 
+	dma_set_cb(dma, chan, DMA_IRQ_TYPE_LLIST, dma_complete, &complete);
+
 	/* transfer max PAGE size at a time to SG buffer */
 	while (size > 0) {
 
@@ -179,6 +189,8 @@ int dma_copy_from_host(struct dma_sg_config *host_sg, int32_t host_offset,
 	local_sg_elem.size = HOST_PAGE_SIZE - offset;
 	list_item_prepend(&local_sg_elem.list, &config.elem_list);
 
+	dma_set_cb(dma, chan, DMA_IRQ_TYPE_LLIST, dma_complete, &complete);
+
 	/* transfer max PAGE size at a time to SG buffer */
 	while (size > 0) {
 
-- 
2.7.4