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I need to use SAI as TDM mode for RK3506G2 Lyra Plus, but i did not find dts parameters...

Hello, we have not used the configuration of SAI in TDM mode. We also don't have the corresponding verification hardware. You can refer to the document in the attachment (only in Chinese version) or check the file $SDK/kernel/Documentation/devicetree/bindings/sound/rockchip,i2s-tdm.txt for device tree configuration.

Thanks