[v3,10/18] dmaengine: dma-jz4780: Enable Fast DMA to the AIC
diff mbox

Message ID 20180721110643.19624-11-paul@crapouillou.net
State Changes Requested
Headers show

Commit Message

Paul Cercueil July 21, 2018, 11:06 a.m. UTC
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>
---
 drivers/dma/dma-jz4780.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

 v2: No change

 v3: No change

Patch
diff mbox

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 88ce3f0157f6..3c9d3952e23a 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
@@ -941,8 +942,8 @@  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 (jzdma->version == ID_JZ4780)
 		jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMACP, 0);