On Wed 2018-05-23 16:06:15, Pavel Machek wrote: > On Wed 2018-05-23 00:56:38, Aaro Koskinen wrote: > > Hi, > > > > On Tue, May 22, 2018 at 10:58:26PM +0200, Pavel Machek wrote: > > > On Tue 2018-05-22 22:41:39, Aaro Koskinen wrote: > > > > My device worked with v4.17-rc1 (haven't found time to test newer kernels), > > > > but if you say the probe order is random then we must find some proper way > > > > to express the dependency. > > > > > > I started bisect, but.. that will probably not be useful. > > > > > > If your device works ok in v4.17-rc1, it probably works in newer -rcs, > > > too. > > > > Actually, my statement may be bogus... Now I tried again with -rc1 > > (and also -rc6) and it fails... But v4.16 works. > > > > > Thanks for the ordering hint, I'll try to figure out what is going on > > > there. > > > > My bisection pointed to 6fa7324ac5489ad43c4b6351355b869bc5458bef which > > doesn't seem to make any sense...?! So maybe there really is something > > random stuff going on? :-( > > So... I did some experiments on v4.16. > > Swapping tsc2005@0 and lcd: acx565akm@2 entries in the dts does break > stuff. > > I thought it might be due to vio regulator, but it does not appear > so... screen still works with tsc2005 driver disabled in .config. (so > there's noone to enable vio regulator). Deleting tsc2005@0 entry also breaks screen. Replacing tsc2005@0 entry with foobar@0 { compatible = "not really with anything"; spi-max-frequency = <6000000>; reg = <0>; }; still results in working touchscreen, removing any of the three fields breaks it again. Strange. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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