* [PATCH] dmaengine: jz4780: Set max number of SGs per burst
@ 2021-08-29 19:58 Artur Rojek
2021-08-30 9:48 ` Paul Cercueil
2021-10-18 6:37 ` Vinod Koul
0 siblings, 2 replies; 4+ messages in thread
From: Artur Rojek @ 2021-08-29 19:58 UTC (permalink / raw)
To: Paul Cercueil, Vinod Koul
Cc: linux-mips, dmaengine, linux-kernel, Artur Rojek
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(+)
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
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] dmaengine: jz4780: Set max number of SGs per burst
2021-08-29 19:58 [PATCH] dmaengine: jz4780: Set max number of SGs per burst Artur Rojek
@ 2021-08-30 9:48 ` Paul Cercueil
2021-10-11 14:09 ` Paul Cercueil
2021-10-18 6:37 ` Vinod Koul
1 sibling, 1 reply; 4+ messages in thread
From: Paul Cercueil @ 2021-08-30 9:48 UTC (permalink / raw)
To: Artur Rojek; +Cc: Vinod Koul, linux-mips, dmaengine, linux-kernel
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
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] dmaengine: jz4780: Set max number of SGs per burst
2021-08-30 9:48 ` Paul Cercueil
@ 2021-10-11 14:09 ` Paul Cercueil
0 siblings, 0 replies; 4+ messages in thread
From: Paul Cercueil @ 2021-10-11 14:09 UTC (permalink / raw)
To: Artur Rojek; +Cc: Vinod Koul, linux-mips, dmaengine, linux-kernel
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 \x7fby
>> the number of available DMA descriptors.
>> This information is useful for device drivers utilizing this DMA
>> \x7fengine.
>>
>> 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
>> \x7fplatform_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
>>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] dmaengine: jz4780: Set max number of SGs per burst
2021-08-29 19:58 [PATCH] dmaengine: jz4780: Set max number of SGs per burst Artur Rojek
2021-08-30 9:48 ` Paul Cercueil
@ 2021-10-18 6:37 ` Vinod Koul
1 sibling, 0 replies; 4+ messages in thread
From: Vinod Koul @ 2021-10-18 6:37 UTC (permalink / raw)
To: Artur Rojek; +Cc: Paul Cercueil, linux-mips, dmaengine, linux-kernel
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
--
~Vinod
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-08-29 19:58 [PATCH] dmaengine: jz4780: Set max number of SGs per burst Artur Rojek
2021-08-30 9:48 ` Paul Cercueil
2021-10-11 14:09 ` Paul Cercueil
2021-10-18 6:37 ` Vinod Koul
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