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: 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>

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 565971c..3a4d0a4 100644 (file)
--- 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);