Yes and no. wheres the first 11 ports, it should be starting at port0.
Odd...
Looks like all the inputs are there: they are "system" inputs, not only for audio device.
sudo dmesg | grep devices | grep input
[ 1.465137] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
[ 2.689597] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input2
[ 3.506497] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input3
[ 3.545724] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input4
[ 3.547624] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input5
[ 3.548364] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input6
[ 3.640229] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input7
[ 3.708335] input: PC Speaker as /devices/platform/pcspkr/input/input8
[ 3.812271] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input9
[ 3.958218] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
[ 3.958608] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input11
[ 3.958662] input: HDA Intel PCH Dock Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input12
[ 3.958714] input: HDA Intel PCH Dock Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input13
[ 3.958765] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input14
[ 3.958818] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input15
[ 3.958868] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
[ 3.958917] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
[ 3.958965] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input18
[ 3.959020] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input19
[ 5.110165] input: Integrated Camera: Integrated C as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/input/input20
Alberto