| Message ID | 20210829195805.148964-1-contact@artur-rojek.eu (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | dmaengine: jz4780: Set max number of SGs per burst | expand |
Hi, Le dim., août 29 2021 at 21:58:05 +0200, Artur Rojek <contact@artur-rojek.eu> a écrit : > Total amount of SG list entries executed in a single burst is limited > by > the number of available DMA descriptors. > This information is useful for device drivers utilizing this DMA > engine. > > Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Acked-by: Paul Cercueil <paul@crapouillou.net> Cheers, -Paul > --- > drivers/dma/dma-jz4780.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c > index ebee94dbd630..96701dedcac8 100644 > --- a/drivers/dma/dma-jz4780.c > +++ b/drivers/dma/dma-jz4780.c > @@ -915,6 +915,7 @@ static int jz4780_dma_probe(struct > platform_device *pdev) > dd->dst_addr_widths = JZ_DMA_BUSWIDTHS; > dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); > dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; > + dd->max_sg_burst = JZ_DMA_MAX_DESC; > > /* > * Enable DMA controller, mark all channels as not programmable. > -- > 2.33.0 >
Hi Vinod, Le lun., août 30 2021 at 10:48:52 +0100, Paul Cercueil <paul@crapouillou.net> a écrit : > Hi, > > Le dim., août 29 2021 at 21:58:05 +0200, Artur Rojek > <contact@artur-rojek.eu> a écrit : >> Total amount of SG list entries executed in a single burst is >> limited by >> the number of available DMA descriptors. >> This information is useful for device drivers utilizing this DMA >> engine. >> >> Signed-off-by: Artur Rojek <contact@artur-rojek.eu> > > Acked-by: Paul Cercueil <paul@crapouillou.net> Feedback on this? Cheers, -Paul >> --- >> drivers/dma/dma-jz4780.c | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c >> index ebee94dbd630..96701dedcac8 100644 >> --- a/drivers/dma/dma-jz4780.c >> +++ b/drivers/dma/dma-jz4780.c >> @@ -915,6 +915,7 @@ static int jz4780_dma_probe(struct >> platform_device *pdev) >> dd->dst_addr_widths = JZ_DMA_BUSWIDTHS; >> dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); >> dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; >> + dd->max_sg_burst = JZ_DMA_MAX_DESC; >> >> /* >> * Enable DMA controller, mark all channels as not programmable. >> -- >> 2.33.0 >> >
On 29-08-21, 21:58, Artur Rojek wrote: > Total amount of SG list entries executed in a single burst is limited by > the number of available DMA descriptors. > This information is useful for device drivers utilizing this DMA engine. Applied, thanks
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c index ebee94dbd630..96701dedcac8 100644 --- a/drivers/dma/dma-jz4780.c +++ b/drivers/dma/dma-jz4780.c @@ -915,6 +915,7 @@ static int jz4780_dma_probe(struct platform_device *pdev) dd->dst_addr_widths = JZ_DMA_BUSWIDTHS; dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + dd->max_sg_burst = JZ_DMA_MAX_DESC; /* * Enable DMA controller, mark all channels as not programmable.
Total amount of SG list entries executed in a single burst is limited by the number of available DMA descriptors. This information is useful for device drivers utilizing this DMA engine. Signed-off-by: Artur Rojek <contact@artur-rojek.eu> --- drivers/dma/dma-jz4780.c | 1 + 1 file changed, 1 insertion(+)