diff options
| author | Pierre-Yves MORDRET <pierre-yves.mordret@st.com> | 2020-01-29 16:36:24 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-02-25 11:15:05 +0530 |
| commit | 22a0bb297cdca9d02407db603bbed84986ef5c05 (patch) | |
| tree | e8d1731a92fb9c7b356d5b22013e833b33d5e51f | |
| parent | 615eee2c45c8448feca0be4e3ad7723916b90744 (diff) | |
dmaengine: stm32-dma: enable descriptor_reuse
Enable client to resubmit already processed descriptors
in order to save descriptor creation time.
Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20200129153628.29329-5-amelie.delaunay@st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/stm32-dma.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); |