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MLK-18643: ARM64: dts: imx8mm: change the sdma script for SAI

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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>
This commit is contained in:
Shengjiu Wang
2018-08-24 16:38:53 +08:00
parent b1d540a2bc
commit d5b70e9232
1 changed files with 5 additions and 5 deletions
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10
arch/arm64/boot/dts/freescale/fsl-imx8mm.dtsi
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@ -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";