Two-finger scroll doesn't work with ELAN0608 touchpad

[perhedeland]

Hi,
I think I'm abusing the "issue" functionality here, since I have no reason to think that this is a problem with the iichid module - but since it was what got my touchpad working at all (thanks again!), I thought you might have some idea about how to get the two-finger scroll to work too...

After you helped me out in issue #20, I have upgraded to the latest xorg-server port with UDEV enabled, and even gotten it to work:-) with the help of Michael Gmelin's excellent script - no more need to specify the exact /dev/input/eventN in an xorg.conf snippet, that part "just works".

But one argument for UDEV that has been mentioned is to get more touchpad functionality working, in particular the two-finger scroll - and it doesn't work for me. I know that the touchpad supports it, since it works in Windows (I have the laptop set up for dual-boot). I think Xorg.0.log has a significant clue, in that it decides that my touchpad is a mouse:-) -

-------------------------------------------------------------
[    29.512] (II) config/udev: Adding input device ELAN0608 (/dev/input/event3)
[    29.512] (**) ELAN0608: Applying InputClass "evdev pointer catchall"
[    29.512] (**) ELAN0608: Applying InputClass "libinput pointer catchall"
[    29.512] (II) Using input driver 'libinput' for 'ELAN0608'
[    29.512] (**) ELAN0608: always reports core events
[    29.512] (**) Option "Device" "/dev/input/event3"
[    29.512] (**) Option "_source" "server/udev"
[    29.512] (II) event3  - ELAN0608: is tagged by udev as: Mouse
[    29.512] (II) event3  - ELAN0608: device is a pointer
[    29.512] (II) event3  - ELAN0608: device removed
[    29.512] (**) Option "config_info" "udev:/dev/input/event3"
[    29.512] (II) XINPUT: Adding extended input device "ELAN0608" (type: MOUSE, id 9)
[    29.513] (**) Option "AccelerationScheme" "none"
[    29.513] (**) ELAN0608: (accel) selected scheme none/0
[    29.513] (**) ELAN0608: (accel) acceleration factor: 2.000
[    29.513] (**) ELAN0608: (accel) acceleration threshold: 4
[    29.513] (II) event3  - ELAN0608: is tagged by udev as: Mouse
[    29.513] (II) event3  - ELAN0608: device is a pointer
-------------------------------------------------------------

Do you have any idea? I can easily try out any source changes.

[wulf7]

Unfortunately your touchpad uses Elantech proprietary protocol rather than HID for multitouch mode which is not supported in this driver.
It is possible to port Elantech driver from Linux which should support this device: https://elixir.bootlin.com/linux/v5.6-rc3/source/include/linux/input/elan-i2c-ids.h#L37 but I do not have opportunities to do that.

[perhedeland]

On 2020-03-02 00:02, Vladimir Kondratyev wrote: Unfortunately your touchpad uses Elantech proprietary protocol rather than HID for multitouch mode which is not supported in this driver.

Ouch, too bad - I was hoping I could actually use the touchpad as a full replacement for a mouse, but I find that I've become too dependant on the mouse wheel...

It is possible to port Elantech driver from Linux which should support this device: https://elixir.bootlin.com/linux/v5.6-rc3/source/include/linux/input/elan-i2c-ids.h#L37 but I do not have opportunities to do that.

Hm, while I have "tinkered" with both the Linux and the FreeBSD kernels in the past, it was mostly "simple" stuff, no device drivers - such a port is definitely beyond my *current* capabilities, but I'll try to at least have a look... Thanks anyway!

…

--Per

[wulf7]

There is not yet committed OpenBSD driver for Elan I2C touchpad https://marc.info/?l=openbsd-tech&m=158509428830926
Porting it to FreeBSD looks rather straightforward. One is to replace OpenBSD bus bits (probe, interrupt establishing and I2C transfers) with newbus bits taken from iichid.c and replace wscons interface with evdev.

[perhedeland]

On 2020-04-29 15:11, Vladimir Kondratyev wrote: There is not yet committed OpenBSD driver for Elan I2C touchpad https://marc.info/?l=openbsd-tech&m=158509428830926 Porting it to FreeBSD looks rather straightforward. One is to replace OpenBSD bus bits (probe, interrupt establishing and I2C transfers) with newbus bits taken from iichid.c and replace wscons interface with evdev.

Thanks, sounds great! I can't say that I understand which bits need to be changed and how, but I'll at least *try* to figure it out...

…

--Per

[wulf7]

I added a port of "Linux Elan I2C touchpad" driver to iichid, so you can test it. I do not have a hardware to do that.

[studikumbang]

cannot scrolling i2c elan0608 touchpad

libinput list devices
Device: ELAN0608:0A 04F3:0400 Mouse Kernel: /dev/input/event7 Group: 8 Seat: seat0, default Capabilities: pointer Tap-to-click: n/a Tap-and-drag: n/a Tap drag lock: n/a Left-handed: disabled Nat.scrolling: disabled Middle emulation: n/a Calibration: n/a Scroll methods: button Click methods: none Disable-w-typing: n/a Accel profiles: flat *adaptive Rotation: n/a
dmesg
iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0 iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0 iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0 iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0 iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0 iichid0: <ELAN0608:0A 04F3:0400 I2C HID device> at addr 0x15 irq 87 on iicbus0 hms0: <ELAN0608:0A 04F3:0400 Mouse> on hidbus0
/boot/loader.conf
ig4_load="YES" iicbus_load="YES" iichid_load="YES"

[wulf7]

Which FreeBSD version do you run?

[studikumbang]

FreeBSD 13.0-STABLE amd64

[wulf7]

Elantech proprietary protocol support was not imported into 13.0 due to lack of testing.
You may create FreeBSD bugzilla issue and assign it to me to test patches as this version of iichid does not compile on 13.0-STABLE