[Bug 1861610] Re: 'Elan touchpad' not detected on 'Lenovo ThinkBook 15 IIL'

Updated to the newer version, still can confirm the issue.Not only that
its not working but it's not detected. Can confirm also that fingerprint
sensor is missing.

Lenovo IML models got supported officialy by ubuntu, I hope that it
would be a small change for IIL models too.

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Title:
'Elan touchpad' not detected on 'Lenovo ThinkBook 15 IIL'

Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.6 package in Ubuntu:
Fix Released
Status in linux-oem-osp1 package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Released
Status in linux-oem-5.6 source package in Bionic:
Invalid
Status in linux-oem-osp1 source package in Bionic:
Fix Released
Status in linux source package in Eoan:
Fix Released
Status in linux-oem-5.6 source package in Eoan:
Invalid
Status in linux-oem-osp1 source package in Eoan:
Fix Released
Status in linux source package in Focal:
Fix Released
Status in linux-oem-5.6 source package in Focal:
Fix Released
Status in linux-oem-osp1 source package in Focal:
Invalid

Bug description:
[SRU Justification]

[Impact]
Touchpad function unavailable on some platforms with new ELAN touchpad
HIDs.

[Fix]
https://lore.kernel.org/linux-input/000201d5a8bd$9fead3f0$dfc07bd0$@emc.com.tw/
required to match these currently unsupported IDs.

[Test Case]
1. check if platform is affected, e.g. with ELAN0634:

$ sudo acpidump | grep -C3 ELAN
2A060: 49 4E 54 31 70 0A 20 49 44 41 44 A4 84 53 42 46 INT1p.IDAD..SBF
2A070: 53 53 42 46 49 00 5B 82 42 0E 54 50 44 32 08 5F SSBFI.[.B.TPD2._
2A080: 41 44 52 00 08 49 44 41 44 00 08 48 49 44 32 00 ADR..IDAD..HID2.
2A090: 08 5F 48 49 44 0D 45 4C 41 4E 30 36 33 34 00 08 ._HID.ELAN0634..
2A0A0: 5F 43 49 44 0D 50 4E 50 30 43 35 30 00 08 5F 55 _CID.PNP0C50.._U
2A0B0: 49 44 01 14 4B 04 5F 44 53 4D 04 A0 3C 93 68 11 ID..K._DSM..<.h.
2A0C0: 13 0A 10 F7 F6 DF 3C 67 42 55 45 AD 05 B3 0A 3D ......<gBUE....=

2. check if touchpad then appear in /proc/bus/input/devices when
applied.

[Regression Potential]
Low. Only add new IDs for currently unsupported platforms.

========== Original Bug Description ==========

The Elan touchpad on my Lenovo Thinkbook isn't being detected, and
hence isn't working.

`sudo acpidump | grep -C3 ELAN` gives me the device's ACPI id:

```bash
ghosthawkzero@EchelonV:~$ sudo acpidump | grep -C3 ELAN
   2A060: 49 4E 54 31 70 0A 20 49 44 41 44 A4 84 53 42 46 INT1p. IDAD..SBF
   2A070: 53 53 42 46 49 00 5B 82 42 0E 54 50 44 32 08 5F SSBFI.[.B.TPD2._
   2A080: 41 44 52 00 08 49 44 41 44 00 08 48 49 44 32 00 ADR..IDAD..HID2.
   2A090: 08 5F 48 49 44 0D 45 4C 41 4E 30 36 33 34 00 08 ._HID.ELAN0634..
   2A0A0: 5F 43 49 44 0D 50 4E 50 30 43 35 30 00 08 5F 55 _CID.PNP0C50.._U
   2A0B0: 49 44 01 14 4B 04 5F 44 53 4D 04 A0 3C 93 68 11 ID..K._DSM..<.h.
   2A0C0: 13 0A 10 F7 F6 DF 3C 67 42 55 45 AD 05 B3 0A 3D ......<gBUE....=
ghosthawkzero@EchelonV:~$
```

Have attached the content from /proc/bus/input/devices.

**EXPECTED** - touchpad to work

**WHAT IS HAPPENING** - touchpad not detected and touchpad not
working.

More info:

LSB release:
```bash
ghosthawkzero@EchelonV:~$ lsb_release -rd
Description: Ubuntu 19.10
Release: 19.10
ghosthawkzero@EchelonV:~$
```

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-29-generic 5.3.0-29.31
ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
Uname: Linux 5.3.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ghosthawkzero 1493 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Feb 2 19:03:29 2020
InstallationDate: Installed on 2020-01-29 (3 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 20SM
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-29-generic root=UUID=c070ef84-6265-4593-a4c3-b0ceddf7e9b4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-29-generic N/A
 linux-backports-modules-5.3.0-29-generic N/A
 linux-firmware 1.183.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/11/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: DJCN14WW
dmi.board.name: LVAC/LVAD
dmi.board.vendor: LENOVO
dmi.board.version: SDK0L77769 WIN
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ThinkBook 15-IIL
dmi.modalias: dmi:bvnLENOVO:bvrDJCN14WW:bd12/11/2019:svnLENOVO:pn20SM:pvrLenovoThinkBook15-IIL:rvnLENOVO:rnLVAC/LVAD:rvrSDK0L77769WIN:cvnLENOVO:ct10:cvrLenovoThinkBook15-IIL:
dmi.product.family: Thinkbook 15-IIL
dmi.product.name: 20SM
dmi.product.sku: LENOVO_MT_20SM_BU_idea_FM_Thinkbook 15-IIL
dmi.product.version: Lenovo ThinkBook 15-IIL
dmi.sys.vendor: LENOVO

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