snd_aw2_saa7146_is_using_digital_input
if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
extern int snd_aw2_saa7146_is_using_digital_input(struct snd_aw2_saa7146