[Patch] Sync psm/evdev/atkbd with FreeBSD - please test

[karu.pruun]

Hello

Great, thanks for doing this work! I'll try to test over weekend.

Best

Peeter



On Wed, Apr 10, 2024 at 11:41 AM Michael Neumann <mneumann at ntecs.de> wrote:
>
> Hi all,
>
> The last couple of days, I worked on syncing our psm/evdev and atkbd
> code  (partially) with FreeBSD head. The result should be better input
> device support (Touchpad etc.) on some Laptops.
>
> The full patch is here:
>
> https://leaf.dragonflybsd.org/~mneumann/0001-Sync-psm-evdev-atkbd-with-FreeBSD.patch
>
> The full list of commits can be seen here:
>
> https://github.com/mneumann/DragonFlyBSD/tree/sync-psm-evdev-atkbd-with-freebsd
>
> I am currently testing this on an old Panasonic CF-SV laptop that I
> bought in Japan, and plan to also test it on a Tuxdeo laptop, where I
> really had issues with the psm driver, which regularily got out of sync.
> This issue should now be fixed, as it is likely to be related to active
> AUX port multiplexing. Feel free to test this patch as well and report
> back potentially issues. If there are no objections, I'd like to merge
> it within the next few weeks.
>
> To summarize some of the changes:
>
> * This (partially) syncs psm/atkbd/evdev with FreeBSD.
>
> * Mostly psm and evdev (w/o uinput) is synced with FreeBSD.
>
> * As for atkbd, only parts related to support active AUX port
>   multiplexer code is synced from FreeBSD. Active AUX port
>   MUX is required to detect for example my synaptics touchpad
>   on the Pansonic CF-SV, otherwise the touchpad is only recognized
>   as standard PS/2 mouse. Other laptops use the same "method" to
>   attach "multiple" mice to the AUX port.
>
> * Adds kern.features sysctl. Xorg uses e.g. kern.features.evdev
>   and kern.features.evdev_support to detect if evdev is available.
>   Alternative is to patch the port. This could be done in
>
>   x11-servers/xorg-server/dragonfly/patch-config_udev.c
>
>   by adding sth like:
>
>         if (strcmp(feature, "evdev") == 0)
>                 return (1);
>         if (strcmp(feature, "evdev_support") == 0)
>                 return (1);
>
>   to the feature_present(const char*) function.
>
>   But I think having kern.features sysctl is the better good way.
>
> * Tested with a Synaptics Touchpad using both moused/sysmouse and
>   libinput under X11. Both work reliably.
>
> * Enables by default hw.psm.{synaptics,trackpoint,elantech}_support.
>
> * Set hw.psm.mux_disabled=1 if your keyboard no longer works due
>   to the AUX MUX code (I haven't synced the quirks code yet).
>
> * atkbd - periodic polling is disabled. Can be turned on by setting
>   loader tunable hw.atkbd.hz to 1 or 10 (as it was before).
>
> ## How to use this with Xorg
>
> sysctl kern.evdev.rcpt_mask=6
>
> Then, either add moused_enable=YES to /etc/rc.conf. Then you can
> use this with the default xorg.conf.
>
> To use this with libinput, which I do, I had to add the following to
> /etc/X11/xorg.conf:
>
> ```
> Section "InputClass"
>         Identifier "libinput pointer catchall"
>         MatchIsPointer "on"
>             MatchIsTouchpad "on"
>         MatchDevicePath "/dev/input/event*"
>         Driver "libinput"
> EndSection
> ```
>
> and in $HOME/.xinitrc:
>
> ```
> xinput set-prop 'SynPS/2 Synaptics TouchPad' 'libinput Tapping Enabled' 1
> ```
>
> to enable tapping. Not needed if sysmouse is used (requires running
> moused). Scrolling feels better with libinput, but that is likely just
> a better default setting.
>
> ## Open issues
>
> * I haven't ported the following patch, which describes a LOR (lock order
>   reversal) by using  evdev_register_mtx(). Maybe someone understands this
>   patch or how to fix the LOR... an easy fix would be to use
>   evdev_register() and using the internal evdev lock.
>
>   https://github.com/freebsd/freebsd-src/commit/d276eae674d22214d6a58d1f4871053ceb0cb9f5
>
> * The psmintr still runs using the mplock. Is that required or is it safe
>   to add INTR_MPSAFE to BUS_SETUP_INTR?
>
> * Before this patch, Xorg would recognize my mouse without moused
>   running with the default configuration. This no longer works.
>
> Regards,
>
>   Michael