diff options
| -rw-r--r-- | drivers/dma/sprd-dma.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index b106e8a60af6..dcfa4179bf9e 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -116,6 +116,13 @@ #define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0 #define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0) +/* define the DMA transfer step type */ +#define SPRD_DMA_NONE_STEP 0 +#define SPRD_DMA_BYTE_STEP 1 +#define SPRD_DMA_SHORT_STEP 2 +#define SPRD_DMA_WORD_STEP 4 +#define SPRD_DMA_DWORD_STEP 8 + #define SPRD_DMA_SOFTWARE_UID 0 /* @@ -598,16 +605,16 @@ static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc, if (IS_ALIGNED(len, 4)) { datawidth = 2; - src_step = 4; - des_step = 4; + src_step = SPRD_DMA_WORD_STEP; + des_step = SPRD_DMA_WORD_STEP; } else if (IS_ALIGNED(len, 2)) { datawidth = 1; - src_step = 2; - des_step = 2; + src_step = SPRD_DMA_SHORT_STEP; + des_step = SPRD_DMA_SHORT_STEP; } else { datawidth = 0; - src_step = 1; - des_step = 1; + src_step = SPRD_DMA_BYTE_STEP; + des_step = SPRD_DMA_BYTE_STEP; } fragment_len = SPRD_DMA_MEMCPY_MIN_SIZE; |