dell-headset-multi does not support mic auto switch since it allow combo jack support headphone, headset or mic jack
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=73bdd597823e2231dc882577dbbaf8df92fe1775
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=13fd08a339f174840046d0b229f434c0a5ee9925
dell-headset-multi does not support mic auto switch since it allow combo jack support headphone, headset or mic jack
https:/ /git.kernel. org/cgit/ linux/kernel/ git/tiwai/ sound.git/ commit/ sound/pci/ hda?id= 73bdd597823e223 1dc882577dbbaf8 df92fe1775
https:/ /git.kernel. org/cgit/ linux/kernel/ git/tiwai/ sound.git/ commit/ sound/pci/ hda?id= 13fd08a339f1748 40046d0b229f434 c0a5ee9925