Hi Pierre-Louis Thank you for your test. > > /* > > * construct cpu channel mask by combining ch_mask of each > > * codec which maps to the cpu. > > + * see > > + * soc.h :: [dai_link->ch_maps Image sample] > > */ > > - for_each_rtd_codec_dais(rtd, j, codec_dai) { > > - if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i) > > - ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask; > > + if (rtd->dai_link->num_cpus >= rtd->dai_link->num_codecs) { > > + /* .ch_map is from CPU */ > > + ch_mask = rtd->dai_link->ch_maps[i].ch_mask; > > ... and for a FE dailink there's no ch_maps so this results in a kernel > oops. Hmm... this is strange... New snd_soc_compensate_connection_map() will add default ch_maps for all dai_link... Oh, is it using topology or something which doesn't call snd_soc_bind_card() ? If so could you please try to call snd_soc_compensate_connection_map() ? (I guess it is using soc_tplg_fe_link_create() ?) If it could solve your issue, v5 will handle it. Thank you for your help !! Best regards --- Kuninori Morimoto