diff options
| author | Abhishek Sahu <absahu@codeaurora.org> | 2017-08-01 19:41:44 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-08-28 16:40:18 +0530 |
| commit | 749d0d4bbb077e9a9e25a910e1cd285a0f0050ef (patch) | |
| tree | 9e8750441995855fa499dd0e9ed6d7b8aac65694 /drivers/dma | |
| parent | dfebb055f73a24e2c8756b837d9ce1a06457f5d7 (diff) | |
| download | linux-749d0d4bbb077e9a9e25a910e1cd285a0f0050ef.tar.bz2 | |
dmaengine: qcom: bam_dma: add command descriptor flag
If DMA_PREP_CMD flag is passed in prep_slave_sg then peripheral
driver has passed the data is in BAM command descriptor format
and BAM driver should set CMD bit for each of the HW descriptors.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/qcom/bam_dma.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 03c4eb3fd314..6d89fb6a6a92 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -65,6 +65,7 @@ struct bam_desc_hw { #define DESC_FLAG_EOT BIT(14) #define DESC_FLAG_EOB BIT(13) #define DESC_FLAG_NWD BIT(12) +#define DESC_FLAG_CMD BIT(11) struct bam_async_desc { struct virt_dma_desc vd; @@ -645,6 +646,9 @@ static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan, unsigned int curr_offset = 0; do { + if (flags & DMA_PREP_CMD) + desc->flags |= cpu_to_le16(DESC_FLAG_CMD); + desc->addr = cpu_to_le32(sg_dma_address(sg) + curr_offset); @@ -960,7 +964,7 @@ static void bam_start_dma(struct bam_chan *bchan) /* set any special flags on the last descriptor */ if (async_desc->num_desc == async_desc->xfer_len) - desc[async_desc->xfer_len - 1].flags = + desc[async_desc->xfer_len - 1].flags |= cpu_to_le16(async_desc->flags); else desc[async_desc->xfer_len - 1].flags |= |