Messages in this thread Patch in this message | | | From | Artur Rojek <> | Subject | [PATCH] dmaengine: jz4780: Set max number of SGs per burst | Date | Sun, 29 Aug 2021 21:58:05 +0200 |
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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> --- 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
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