On Mon, 29 Apr 2019 at 20:01, Vinod Koul <vkoul@xxxxxxxxxx> wrote:
>
> On 15-04-19, 20:15, Baolin Wang wrote:
> > 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@xxxxxxxxxx>
> > ---
> > drivers/dma/sprd-dma.c | 22 +++++++++++++++++++++-
> > 1 file changed, 21 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
> > index cc9c24d..4c18f44 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)
>
> Who configure int_type?
The int_type is configured through the flags of
sprd_dma_prep_slave_sg() by users, see:
https://elixir.bootlin.com/linux/v5.1-rc6/source/include/linux/dma/sprd-dma.h#L9
>
> > + 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 @@ static int sprd_dma_fill_linklist_desc(struct dma_chan *chan,
> > 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)
> > --
> > 1.7.9.5
>
> --
> ~Vinod
--
Baolin Wang
Best Regards
