dmaengine: dma-jz4780: Enable Fast DMA to the AIC (17a8e30e) · Commits · 戴 / test

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>

drivers/dma/dma-jz4780.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -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);

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