From: Pierre-Yves MORDRET <pierre-yves.mordret@xxxxxx> Enable client to resubmit already processed descriptors in order to save descriptor creation time. Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@xxxxxx> Signed-off-by: Amelie Delaunay <amelie.delaunay@xxxxxx> --- drivers/dma/stm32-dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index c8bbe08b8e32..25f7281932bd 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -554,6 +554,7 @@ static void stm32_dma_start_transfer(struct stm32_dma_chan *chan) sg_req = &chan->desc->sg_req[chan->next_sg]; reg = &sg_req->chan_reg; + reg->dma_scr &= ~STM32_DMA_SCR_EN; stm32_dma_write(dmadev, STM32_DMA_SCR(chan->id), reg->dma_scr); stm32_dma_write(dmadev, STM32_DMA_SPAR(chan->id), reg->dma_spar); stm32_dma_write(dmadev, STM32_DMA_SM0AR(chan->id), reg->dma_sm0ar); @@ -1343,6 +1344,7 @@ static int stm32_dma_probe(struct platform_device *pdev) dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; dd->max_burst = STM32_DMA_MAX_BURST; + dd->descriptor_reuse = true; dd->dev = &pdev->dev; INIT_LIST_HEAD(&dd->channels); -- 2.17.1
