root@DRIFTWOOD:/proc/asound/sc7180rt5682max/pcm1p/sub0# cat info 
card: 0
device: 1
subdevice: 0
stream: PLAYBACK
id: MultiMedia1 multicodec-1
name: 
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1
root@DRIFTWOOD:/proc/asound/sc7180rt5682max/pcm1p/sub0# cat hw_params 
closed
root@DRIFTWOOD:/proc/asound/sc7180rt5682max/pcm1p/sub0# cat hw_params 
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 4
rate: 48000 (48000/1)
period_size: 3072
buffer_size: 6144