diff options
| author | Shengjiu Wang <shengjiu.wang@nxp.com> | 2018-08-24 16:38:53 +0800 |
|---|---|---|
| committer | Shengjiu Wang <shengjiu.wang@nxp.com> | 2018-08-27 14:35:09 +0800 |
| commit | d5b70e9232218c419f7f6f843249e4bba84156b6 (patch) | |
| tree | cca3eab3e936a52d8d1a756d04b88848de0c4059 /arch/arm64/boot | |
| parent | b1d540a2bcb1b84039157fb170b993ff9da4a4bc (diff) | |
MLK-18643: ARM64: dts: imx8mm: change the sdma script for SAI
The IMX_DMATYPE_SAI(24) performance is not enough to support high
sample rate/channels of audio case, there is a lot of underrun and
the sound is noise, the reason is that with this script, sdma copy data
through a long path (SDMA->pl301_audio -> pl301_display -> … ->
pl301_wakeup -> AIPS1 -> SPBA2 -> SAI).
The IMX_DMATYPE_SSI_SP(2) performance is better, which go through a shorter
path (SDMA -> SPBA2 -> SAI).
So we switch to use the IMX_DMATYPE_SSI_SP script, then 384k/32b/16c is
supported well.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Diffstat (limited to 'arch/arm64/boot')
| -rwxr-xr-x | arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi b/arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi index ddc84dca3681..f4c786e94e98 100755 --- a/arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi @@ -716,7 +716,7 @@ <&clk IMX8MM_CLK_SAI1_ROOT>, <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; - dmas = <&sdma2 0 24 0>, <&sdma2 1 24 0>; + dmas = <&sdma2 0 2 0>, <&sdma2 1 2 0>; dma-names = "rx", "tx"; fsl,dataline = <0xff 0xff>; status = "disabled"; @@ -732,7 +732,7 @@ <&clk IMX8MM_CLK_SAI2_ROOT>, <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; - dmas = <&sdma2 2 24 0>, <&sdma2 3 24 0>; + dmas = <&sdma2 2 2 0>, <&sdma2 3 2 0>; dma-names = "rx", "tx"; status = "disabled"; }; @@ -746,7 +746,7 @@ <&clk IMX8MM_CLK_SAI3_ROOT>, <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; - dmas = <&sdma2 4 24 0>, <&sdma2 5 24 0>; + dmas = <&sdma2 4 2 0>, <&sdma2 5 2 0>; dma-names = "rx", "tx"; status = "disabled"; }; @@ -760,7 +760,7 @@ <&clk IMX8MM_CLK_SAI5_ROOT>, <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; - dmas = <&sdma2 8 24 0>, <&sdma2 9 24 0>; + dmas = <&sdma2 8 2 0>, <&sdma2 9 2 0>; dma-names = "rx", "tx"; fsl,shared-interrupt; fsl,dataline = <0xf 0xf>; @@ -777,7 +777,7 @@ <&clk IMX8MM_CLK_SAI6_ROOT>, <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; - dmas = <&sdma2 10 24 0>, <&sdma2 11 24 0>; + dmas = <&sdma2 10 2 0>, <&sdma2 11 2 0>; dma-names = "rx", "tx"; fsl,shared-interrupt; status = "disabled"; |