MAX_NUM_CH 850 drivers/gpu/drm/rockchip/cdn-dp-reg.c val = MAX_NUM_CH(audio->channels); MAX_NUM_CH 921 drivers/gpu/drm/rockchip/cdn-dp-reg.c val = MAX_NUM_CH(2) | AUDIO_TYPE_LPCM | CFG_SUB_PCKT_NUM(4);