diff options
| author | Baolin Wang <baolin.wang@linaro.org> | 2019-05-06 09:28:33 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-05-21 15:53:54 +0200 |
| commit | 9bb9fe0cfbe0aa72fed906ade0590e1702815e5d (patch) | |
| tree | 730e1e22d812ec482cb286f0ff36ad923a1991a6 /drivers/dma | |
| parent | dmaengine: sprd: Fix the right place to configure 2-stage transfer (diff) | |
| download | linux-9bb9fe0cfbe0aa72fed906ade0590e1702815e5d.tar.xz linux-9bb9fe0cfbe0aa72fed906ade0590e1702815e5d.zip | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/sprd-dma.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 01abed5cde49..baac476c8622 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -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) |