Enable fly-by mode when the DMA_SLAVE_FLAG_FLY_BY flag is set in the
slave configuration.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/dma/mmp_pdma.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 7ed7850..849bf75 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -63,6 +63,8 @@
#define DCMD_FLOWTRG BIT(28) /* Flow Control by the target. */
#define DCMD_STARTIRQEN BIT(22) /* Start Interrupt Enable */
#define DCMD_ENDIRQEN BIT(21) /* End Interrupt Enable */
+#define DCMD_FLYBYS BIT(20) /* Fly-By Source */
+#define DCMD_FLYBYT BIT(19) /* Fly-By Target */
#define DCMD_ENDIAN BIT(18) /* Device Endian-ness. */
#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
@@ -708,11 +710,15 @@ static int mmp_pdma_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
case DMA_SLAVE_CONFIG:
if (cfg->direction == DMA_DEV_TO_MEM) {
chan->dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
+ if (cfg->flags & DMA_SLAVE_FLAG_FLY_BY)
+ chan->dcmd |= DCMD_FLYBYT;
maxburst = cfg->src_maxburst;
width = cfg->src_addr_width;
addr = cfg->src_addr;
} else if (cfg->direction == DMA_MEM_TO_DEV) {
chan->dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
+ if (cfg->flags & DMA_SLAVE_FLAG_FLY_BY)
+ chan->dcmd |= DCMD_FLYBYS;
maxburst = cfg->dst_maxburst;
width = cfg->dst_addr_width;
addr = cfg->dst_addr;
--
1.8.3.2
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