https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/cmipci.c
CMIPCI_SB_INPUT_SW("Line Capture Route", 4, 3),
You have to ask the Maintainter of cmipci why the control have 4 values if it emulate sb16
https:/ /git.kernel. org/cgit/ linux/kernel/ git/tiwai/ sound.git/ tree/sound/ pci/cmipci. c
CMIPCI_ SB_INPUT_ SW("Line Capture Route", 4, 3),
You have to ask the Maintainter of cmipci why the control have 4 values if it emulate sb16