Hello Linux kernel input team,

On the 2020 Clevo "NL4x_NL5xLU" computer, the touchpad is not detected correctly by default. I mean I could use touchpad single gestures but not multi-touch gestures.
Adding "pci=nocrs" boot parameter solves the problem, details below.

This issue has been reported few months ago by another users on Ubuntu Launchpad, see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1904052

I tried on Debian Sid with kernel 5.8, 5.9, 5.10 and 5.11.0-rc4 (compiled two days ago) and the result is still the same.

When looking at "/proc/bus/input/devices" I don't see my touchpad but I only see:
> I: Bus=0011 Vendor=0002 Product=0005 Version=0063
> N: Name="ImPS/2 Logitech Wheel Mouse"
> P: Phys=isa0060/serio1/input0
> S: Sysfs=/devices/platform/i8042/serio1/input/input6
> U: Uniq=
> H: Handlers=mouse2 event6
> B: PROP=1
> B: EV=7
> B: KEY=70000 0 0 0 0
> B: REL=103

After adding the boot parameter "pci=nocrs" via grub I see in addition two new devices:
> I: Bus=0018 Vendor=2808 Product=0101 Version=0100
> N: Name="FTCS1000:01 2808:0101 Mouse"
> P: Phys=i2c-FTCS1000:01
> S:
> Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-FTCS1000:01/0018:2808:0101.0001/input/input17
> U: Uniq=
> H: Handlers=mouse0 event7
> B: PROP=0
> B: EV=17
> B: KEY=30000 0 0 0 0
> B: REL=903
> B: MSC=10
>
> I: Bus=0018 Vendor=2808 Product=0101 Version=0100
> N: Name="FTCS1000:01 2808:0101 Touchpad"
> P: Phys=i2c-FTCS1000:01
> S:
> Sysfs=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-FTCS1000:01/0018:2808:0101.0001/input/input18
> U: Uniq=
> H: Handlers=mouse1 event8
> B: PROP=5
> B: EV=1b
> B: KEY=e520 10000 0 0 0 0
> B: ABS=2e0800000000003
> B: MSC=20

In "The kernel's command-line parameters", it is requested to report a bug if "pci=nocrs" is needed, here it is.

What can I do to help you making this touchpad working by default with the Linux kernel?
(I don't know a lot about hardware and Linux kernel related stuff)

Thanks in advance.