[PATCH v5 10/18] dmaengine: dma-jz4780: Enable Fast DMA to the AIC
From: Paul Cercueil <paul@crapouillou.net>
Date: 2018-08-29 21:34:24
Also in:
dmaengine, linux-mips, lkml
Subsystem:
dma generic offload engine subsystem, ingenic jz47xx socs, the rest · Maintainers:
Vinod Koul, Paul Cercueil, Linus Torvalds
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 <redacted>
Reviewed-by: PrasannaKumar Muralidharan <redacted>
---
Notes:
v2: No change
v3: No change
v4: No change
v5: No change
drivers/dma/dma-jz4780.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 565971c2a33c..3a4d0a4b550d 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c@@ -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);
--
2.11.0