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path: root/drivers/dma/qcom_bam_dma.c
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Diffstat (limited to 'drivers/dma/qcom_bam_dma.c')
-rw-r--r--drivers/dma/qcom_bam_dma.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/dma/qcom_bam_dma.c b/drivers/dma/qcom_bam_dma.c
index 82c923146e49..7a4bbb0f80a5 100644
--- a/drivers/dma/qcom_bam_dma.c
+++ b/drivers/dma/qcom_bam_dma.c
@@ -61,12 +61,17 @@ struct bam_desc_hw {
#define DESC_FLAG_INT BIT(15)
#define DESC_FLAG_EOT BIT(14)
#define DESC_FLAG_EOB BIT(13)
+#define DESC_FLAG_NWD BIT(12)
struct bam_async_desc {
struct virt_dma_desc vd;
u32 num_desc;
u32 xfer_len;
+
+ /* transaction flags, EOT|EOB|NWD */
+ u16 flags;
+
struct bam_desc_hw *curr_desc;
enum dma_transfer_direction dir;
@@ -490,6 +495,14 @@ static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan,
if (!async_desc)
goto err_out;
+ if (flags & DMA_PREP_FENCE)
+ async_desc->flags |= DESC_FLAG_NWD;
+
+ if (flags & DMA_PREP_INTERRUPT)
+ async_desc->flags |= DESC_FLAG_EOT;
+ else
+ async_desc->flags |= DESC_FLAG_INT;
+
async_desc->num_desc = num_alloc;
async_desc->curr_desc = async_desc->desc;
async_desc->dir = direction;
@@ -793,8 +806,11 @@ static void bam_start_dma(struct bam_chan *bchan)
else
async_desc->xfer_len = async_desc->num_desc;
- /* set INT on last descriptor */
- desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
+ /* set any special flags on the last descriptor */
+ if (async_desc->num_desc == async_desc->xfer_len)
+ desc[async_desc->xfer_len - 1].flags = async_desc->flags;
+ else
+ desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
if (bchan->tail + async_desc->xfer_len > MAX_DESCRIPTORS) {
u32 partial = MAX_DESCRIPTORS - bchan->tail;