[PATCH] dmaengine: jz4780: Set max number of SGs per burst

From: Artur Rojek
Date: Sun Aug 29 2021 - 15:58:38 EST


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@xxxxxxxxxxxxxx>
---
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