[PATCH 1/2] ASoC: rockchip: i2s: fix error defination of transmit data level

From: Jianqun Xu
Date: Tue Dec 23 2014 - 04:11:14 EST


According to description about "Transmit Data Level",

This bit field controls the level at which a DMA request
is made by the transmit logic.

It is equal to the watermark level.

That is, the dma_tx_req signal is generated when the number
of valid data entries in the TXFIFO
(TXFIFO0 if CSR=00
TXFIFO1 if CSR=01
TXFIFO2 if CSR=10
TXFIFO3 if CSR=11)
is equal to or below this field value.

Different to receive data level, transmit data level does not need
to "-1".

Signed-off-by: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>
---
sound/soc/rockchip/rockchip_i2s.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/rockchip/rockchip_i2s.h b/sound/soc/rockchip/rockchip_i2s.h
index 89a5d8b..93f456f 100644
--- a/sound/soc/rockchip/rockchip_i2s.h
+++ b/sound/soc/rockchip/rockchip_i2s.h
@@ -127,7 +127,7 @@
#define I2S_DMACR_TDE_DISABLE (0 << I2S_DMACR_TDE_SHIFT)
#define I2S_DMACR_TDE_ENABLE (1 << I2S_DMACR_TDE_SHIFT)
#define I2S_DMACR_TDL_SHIFT 0
-#define I2S_DMACR_TDL(x) ((x - 1) << I2S_DMACR_TDL_SHIFT)
+#define I2S_DMACR_TDL(x) ((x) << I2S_DMACR_TDL_SHIFT)
#define I2S_DMACR_TDL_MASK (0x1f << I2S_DMACR_TDL_SHIFT)

/*
--
1.9.1


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