Hi Martin, On Wed, Jun 21, 2017 at 09:05:37AM +0200, Martin Kepplinger wrote: > On 2017-06-20 16:08, Baruch Siach wrote: > > On Sun, Jun 18, 2017 at 04:45:15PM +0200, Martin Kepplinger wrote: > >> On 2017-06-18 15:17, Baruch Siach wrote: > >>> Is it possible to set the ts_calibrate results into the kernel input layer > >>> using the EVIOCSABS ioctl()? That would make the calibration instantly > >>> available to all touchscreen input device users, independent from the > >>> tslib library. > >> > >> What version of tslib do you use? You should use a recent version from > >> Debian sid, for example. > > > > I'm building the latest version statically using Buildroot. > > > >> Do you mean the ts_read_mt() tslib samples data? You might mainly use > >> the linear plugin with ts_calibrate, but it's actually a special case. > >> > >>> The problem I am facing is that I'm on X11, stuck with an old kernel (pre > >>> of_touchscreen.c), and a Debian installation that does not package > >>> xf86-input-tslib. The xf86-input-evdev Calibration option doesn't work at all > >>> for some reason. > >> > >> Have you read the README.md documentation, specifically > >> https://github.com/kergoth/tslib#use-the-filtered-result-in-your-system-ts_uinput-method > >> ? > > > > Thanks for the pointer. I was not aware of that trick. I still think that > > configuring the original input device is easier, since it doesn't require > > special configuration on the Xorg side. > > Well. Right. At least you have to tell Xorg to use the new "ts_uinput" > device. > > >> But xf86-input-tslib can also be installed seperately. It's indeed not > >> yet packaged for Debian, but available here: > >> https://github.com/merge/xf86-input-tslib > >> > >>> Looking around I could not find any EVIOCSABS user. The EVIOCSABS ioctl() > >>> as been in the kernel since pre-git times. > >>> > >>> Am I missing something obvious here? > >> > >> Actually I don't know how common or useful it would be to edit the real > >> device' values with EVIOCSABS. I always went the uinput way, creating a > >> new device, until now. > >> > >> I'll think about it. Feel free to open an issue if you have a concrete idea. > > > > I found eventually that both systemd/udev and libevdev do EVIOCSABS. > > systemd/udev could not help me because the version I have installed on target > > is 215, while this feature was introduced only in 220 (commit 51c0c2869845a0). > > So I settled for running the libevdev relatively new libevdev-tweak-device > > utility from a custom udev rule. This solution works nicely. > > How to read tslib's touch samples? > > I may get it wrong, but if we add some daemon program that "tweaks" > TSLIB_TSDEVICE, wouldn't tslib itself read that again and things would > got wrong? There is no daemon. libevdev-tweak-device calls the EVIOCSABS ioctl() only once when the device node is created. > >>> FWIW, the touchscreen driver is edt-ft5x06.c, that works nicely except > >>> from the calibration. Both X and Y are reported x2 at the X11 level. > >> > >> I have used this driver too. But it shouldn't matter at all. > > > > Thanks for your help, baruch -- http://baruch.siach.name/blog/ ~. .~ Tk Open Systems =}------------------------------------------------ooO--U--Ooo------------{= - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -
