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dmaengine: qcom: bam_dma: add command descriptor flag

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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>
This commit is contained in:
Abhishek Sahu 2017-08-01 19:41:44 +05:30 committed by Vinod Koul
parent dfebb055f7
commit 749d0d4bbb
1 changed files with 5 additions and 1 deletions
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6
drivers/dma/qcom/bam_dma.c
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@ -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 |=