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There > are cases where the CPU dai reports capabilities that the codec DAI does > not support - e.g. when the AEC reference is generated in firmware on > the host DSP. Hmm... I thought all issue was solved... > For those systems, trying to match CPU and codec dais is not going to > work. Either we skip this verification or we have an escape mechanism to > avoid triggering errors. Sorry, but I'm not 100% understand about your situation. Why Codec can't have channels_min ? If the Codec can flexibly adjust to paired CPU, Codec can have full channels support, like dummy DAI ? This means verification is based on CPU only. Is it not enough ? and/or Can you show me the driver ? static struct snd_soc_dai_driver dummy_dai = { ... .playback = { => .channels_min = 1, => .channels_max = 384, ... }, .capture = { ... => .channels_min = 1, => .channels_max = 384, ... }, ... }; Thank you for your help !! Best regards --- Renesas Electronics Ph.D. Kuninori Morimoto