Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 17a8e30e authored by Paul Cercueil's avatar Paul Cercueil Committed by Vinod Koul
Browse files

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



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: default avatarPaul Cercueil <paul@crapouillou.net>
Tested-by: default avatarMathieu Malaterre <malat@debian.org>
Reviewed-by: default avatarPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent ae9156b6

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);