Dear Programmers:
IMX6Q SDMA does not work, with Kernel 4.1.15, in Android 7.1.1 system. SDMA firmware name is sdma-imx6q.bin, whose version is 3.3.
Here I want to use SDMA for Audio Subsystem SSI.
PCM Stream to platform DAI mapping relation:
pcmC0D0c ---> 2028000.ssi
pcmC0D0p ---> 2028000.ssi
pcmC0D1c ---> 202c000.ssi
pcmC0D1p ---> 202c000.ssi
pcmC0D2c ---> 2030000.ssi
pcmC0D2p ---> 2030000.ssi
pcmC0D3c ---> 2024000.esai
pcmC0D3p ---> 2024000.esai
I tested pcmC0D0p device node with "tinyplay" . Testing command line is "tinyplay source.wav -D 0 -d 0"，and result is "Error playing sample". Something is wrong.
SDMA interrupt info:
284: 4 0 GPC 2 Level sdma
SDMA DTS Configuration:
sdma: sdma@020ec000 {
compatible = "fsl,imx6q-sdma", "fsl,imx35-sdma";
reg = <0x020ec000 0x4000>;
interrupts = <0 2 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6QDL_CLK_SDMA>,
<&clks IMX6QDL_CLK_SDMA>;
clock-names = "ipg", "ahb";
#dma-cells = <3>;
fsl,sdma-ram-script-name = "imx/sdma/sdma-imx6q.bin";
status="okay";
};
SSI DTS Configuration:
ssi1: ssi@02028000 {
#sound-dai-cells = <0>;
compatible = "fsl,imx6q-ssi",
"fsl,imx51-ssi";
reg = <0x02028000 0x4000>;
interrupts = <0 46 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6QDL_CLK_SSI1_IPG>,
<&clks IMX6QDL_CLK_SSI1>;
clock-names = "ipg", "baud";
dmas = <&sdma 37 22 0>,
<&sdma 38 22 0>;
dma-names = "rx", "tx";
fsl,fifo-depth = <15>;
status = "okay";
};
After a preliminary investigation, I found that during tinyplay testing, DMA call back function void imx_pcm_dma_complete(void *arg) does not occur at all, and SDMA interrupt does not increase.
If anyone knows what is going on, please tell me. Thanks a lot.
Best regards.
