dmaengine: jz4780: Set max number of SGs per burst

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>

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index ebee94dbd63030933e3c0c79eed002f67cbfb473..96701dedcac8647048a5bf0a349a114401888839 100644 (file)
--- 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.