RaspberryPI

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https://github.com/kumaashi/RaspberryPI/blob/ee5ecbaa68635a4c577c00ec8ec1e4e0f8ee815e/RPIZEROW/Sample_HDMI_DMA_Audio_03/main.c#L130

I can be wrong, but it looks like you forgot OR operation:

	mai_ctl |= (1 << 0);  //RST
	mai_ctl |= (1 << 2);  //UF
	mai_ctl |= (1 << 9);  //FLUSH