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dmaengine: jz4780: Set max number of SGs per burst

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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>
Link: https://lore.kernel.org/r/20210829195805.148964-1-contact@artur-rojek.eu
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Artur Rojek 2021-08-29 21:58:05 +02:00 committed by Vinod Koul
parent 161596fd77
commit d59f7037ce
1 changed files with 1 additions and 0 deletions
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drivers/dma/dma-jz4780.c
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@ -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.