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dmaengine: sprd: Add interrupt support for 2-stage transfer 

For 2-stage transfer, some users like Audio still need transaction interrupt
to notify when the 2-stage transfer is completed. Thus we should enable
2-stage transfer interrupt to support this feature.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Baolin Wang 2019-05-06 15:28:33 +08:00 committed by Vinod Koul
parent c434e377da
commit 9bb9fe0cfb
1 changed files with 21 additions and 1 deletions
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22
drivers/dma/sprd-dma.c
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@ -62,6 +62,8 @@
/* SPRD_DMA_GLB_2STAGE_GRP register definition */
#define SPRD_DMA_GLB_2STAGE_EN BIT(24)
#define SPRD_DMA_GLB_CHN_INT_MASK GENMASK(23, 20)
#define SPRD_DMA_GLB_DEST_INT BIT(22)
#define SPRD_DMA_GLB_SRC_INT BIT(20)
#define SPRD_DMA_GLB_LIST_DONE_TRG BIT(19)
#define SPRD_DMA_GLB_TRANS_DONE_TRG BIT(18)
#define SPRD_DMA_GLB_BLOCK_DONE_TRG BIT(17)
@ -135,6 +137,7 @@
/* define DMA channel mode & trigger mode mask */
#define SPRD_DMA_CHN_MODE_MASK GENMASK(7, 0)
#define SPRD_DMA_TRG_MODE_MASK GENMASK(7, 0)
#define SPRD_DMA_INT_TYPE_MASK GENMASK(7, 0)
/* define the DMA transfer step type */
#define SPRD_DMA_NONE_STEP 0
@ -190,6 +193,7 @@ struct sprd_dma_chn {
u32 dev_id;
enum sprd_dma_chn_mode chn_mode;
enum sprd_dma_trg_mode trg_mode;
enum sprd_dma_int_type int_type;
struct sprd_dma_desc *cur_desc;
};
@ -429,6 +433,9 @@ static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
val |= SPRD_DMA_GLB_2STAGE_EN;
if (schan->int_type != SPRD_DMA_NO_INT)
val |= SPRD_DMA_GLB_SRC_INT;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
break;
@ -436,6 +443,9 @@ static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
val |= SPRD_DMA_GLB_2STAGE_EN;
if (schan->int_type != SPRD_DMA_NO_INT)
val |= SPRD_DMA_GLB_SRC_INT;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
break;
@ -443,6 +453,9 @@ static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
SPRD_DMA_GLB_DEST_CHN_MASK;
val |= SPRD_DMA_GLB_2STAGE_EN;
if (schan->int_type != SPRD_DMA_NO_INT)
val |= SPRD_DMA_GLB_DEST_INT;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
break;
@ -450,6 +463,9 @@ static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
SPRD_DMA_GLB_DEST_CHN_MASK;
val |= SPRD_DMA_GLB_2STAGE_EN;
if (schan->int_type != SPRD_DMA_NO_INT)
val |= SPRD_DMA_GLB_DEST_INT;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
break;
@ -911,11 +927,15 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
schan->linklist.virt_addr = 0;
}
/* Set channel mode and trigger mode for 2-stage transfer */
/*
* Set channel mode, interrupt mode and trigger mode for 2-stage
* transfer.
*/
schan->chn_mode =
(flags >> SPRD_DMA_CHN_MODE_SHIFT) & SPRD_DMA_CHN_MODE_MASK;
schan->trg_mode =
(flags >> SPRD_DMA_TRG_MODE_SHIFT) & SPRD_DMA_TRG_MODE_MASK;
schan->int_type = flags & SPRD_DMA_INT_TYPE_MASK;
sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT);
if (!sdesc)