dmaengine: sprd: Define the DMA transfer step type (6b1d255e) · Commits · 戴 / test

drivers/dma/sprd-dma.c

+13 −6

Original line number	Diff line number	Diff line
		@@ -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;