ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM
ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
acp_dma_start(acp_mmio, ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
rtd->ch2 = ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM;