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dmaengine: dma-jz4780: Enable Fast DMA to the AIC

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With the fast DMA bit set, the DMA will transfer twice as much data
per clock period to the AIC, so there is little point not to set it.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Mathieu Malaterre <malat@debian.org>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Paul Cercueil 2018-08-29 23:32:52 +02:00 committed by Vinod Koul
parent ae9156b63d
commit 17a8e30e9d
1 changed files with 3 additions and 2 deletions
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5
drivers/dma/dma-jz4780.c
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@ -52,6 +52,7 @@
#define JZ_DMA_DMAC_DMAE BIT(0)
#define JZ_DMA_DMAC_AR BIT(2)
#define JZ_DMA_DMAC_HLT BIT(3)
#define JZ_DMA_DMAC_FAIC BIT(27)
#define JZ_DMA_DMAC_FMSC BIT(31)
#define JZ_DMA_DRT_AUTO 0x8
@ -923,8 +924,8 @@ static int jz4780_dma_probe(struct platform_device *pdev)
* Also set the FMSC bit - it increases MSC performance, so it makes
* little sense not to enable it.
*/
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC,
JZ_DMA_DMAC_DMAE | JZ_DMA_DMAC_FMSC);
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, JZ_DMA_DMAC_DMAE |
JZ_DMA_DMAC_FAIC | JZ_DMA_DMAC_FMSC);
if (soc_data->flags & JZ_SOC_DATA_PROGRAMMABLE_DMA)
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMACP, 0);