imx8m pcm sai1

[dhty2015]

I need to use the sound card on imx8mq and the connection mode is i2c and i2s.I2s has seven pins: MCLK, LRCK, SCLK, SDIN1, SDIN2, SDIN3, SDIN4

But no one knows how to change the SAI configuration.Do you only need to change DTS?Want answers or examples.Thank you very much!

[igorpadykov]

Hi dhty2015

one can look at "pinctrl_sai1_pcm: sai1grp_pcm" dts example on

fsl-imx8mq-evk.dts\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel 

Best regards
igor
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[dhty2015]

现在，我使用i2c3和sai1连接解码器芯片。使用情况如图：

通过cat /proc/asound/cards可以看到我的声卡：

但是我使用tinyplay 进行播放声音的时候，只是有i2c的信号，而没有SAI的任何信号。

请问，如上连接，只有TXD0~3三根数据线，需要对sai1进行另外的配置吗？

[igorpadykov]

one can check

How to setup sai1 tdm mode for imx8mq-evk?  

Best regards
igor

[dhty2015]

igorpadykov‌

感谢你，我现在已经完成了新声卡的驱动，可以使用tinyplay播放，tinymix调整寄存器属性。

现在有个新问题 ，就是把这张声卡加入到android的音频策略中去。我使用的是imx8mq-evk android 9.0的源码，我可以参考源码中哪个声卡的流程来添加我的声卡到android策略中呢？感谢！

[dhty2015]

Compared to pinctrl_sai1_pcm, I didn't use RXD7 TXD4 to TXD7.Should I just delete the configuration?Do you need to modify the &sai1, and sai drivers?