Re: HUION tablet

[adr <adr%sdf.org@localhost>]

> I'm trying to use a HUION H430P graphics tablet on netbsd. It's
> recognized by ums(4) but I've to use wsmuxctl(8) to remove it from
> wsmux0 so the mouse don't get useless when X see both as tablets.
> The problem is that ums is not reading the pressure of the tablet.
> I haven't taken a look at the driver, but this is a tricky device.
> The chip is a uclogic, it doesn't offer a compliant hid report,
> the driver has to read some strings depending of the version of
> the chip to set the device mode (mobile, desktop) and get the
> correct parameters.
>
> Is anyone using these kind of tablets (huion, yiynova, turcom, etc)?
>
> Regards,
> adr

I've been looking at how hidev -> ums-> wsmouse -> X11 work and
I'm aware now of the situation.

The ideal solution to me would be to add support to digitizers to
ums and wsmouse so the stylus buttons, pressure &c could flow to
the X server.

I added code to usbdev to asign a report descriptor matching my
model making it easy to support different models in the future and
the uhid device reports a functional report descriptor (I'll add
the tablet's buttons later):

$ usbhidctl -f 3 -l -a
Digitizer.Stylus.Tip_Switch=1
Digitizer.Stylus.Barrel_Switch=0
Digitizer.Stylus.Tablet_Pick=0
Digitizer.Stylus.In_Range=1
Digitizer.Stylus.X=17710
Digitizer.Stylus.Y=15240
Digitizer.Stylus.Tip_Pressure=2800

The usages are now Digitizer and 0x01 (external pen), ums only
match Digitizer and 0x02 (integrated pen) so the uhid device is
now free.

I compiled the usbtablet driver from openbsd's Xenocara but
the base xorg is ignoring the input sections of configuration files:

Section "InputDevice"
	Identifier "Hion Tablet"
	Driver "usbtablet"
	Option "Device" "/dev/uhid3"
	Option "Type" "stylus"
	Option "Mode" "Absolute"
EndSection

It doesn't give me errors, it just ignores it, which is frustrating.
I tryed disabling AutoAddDevices, it doesn't matter. Has someone
experimented something similar?

I really don't want to make another installation without X, to
install pkgsrc xorg, which I think if you ask me, shouldn't exist,
and then having to recompile all the packages using X. But there is
a port of usbtablet in wip depending on it...

Is somebody using it right now? Has somebody tryed it with the base
X?

Regards,
adr