PCM_UNKNOWN_CHANNEL 473 sound/pci/ca0106/ca0106_main.c [PCM_UNKNOWN_CHANNEL] = SPI_DACD1_REG, PCM_UNKNOWN_CHANNEL 479 sound/pci/ca0106/ca0106_main.c [PCM_UNKNOWN_CHANNEL] = SPI_DACD1_BIT, PCM_UNKNOWN_CHANNEL 561 sound/pci/ca0106/ca0106_main.c return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);