From: tony@atomide•com (Tony Lindgren)
To: linux-arm-kernel@lists•infradead.org
Subject: v4.17-rc1: regressions on N900, N950
Date: Wed, 23 May 2018 15:04:56 -0700 [thread overview]
Message-ID: <20180523220456.GY98604@atomide.com> (raw)
In-Reply-To: <20180523201208.GA31731@amd>
* Pavel Machek <pavel@ucw•cz> [180523 20:14]:
> 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 at 0 and lcd: acx565akm at 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 at 0 entry also breaks screen.
>
> Replacing tsc2005 at 0 entry with
>
> foobar at 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.
I bisected one regression down, see "omapdrm regression in v4.17-rc series"
not sure if it covers all the issues being discussed here though.
Regards,
Tony
next prev parent reply other threads:[~2018-05-23 22:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-22 7:42 v4.17-rc1: regressions on N900, N950 Pavel Machek
2018-04-23 20:29 ` Aaro Koskinen
2018-05-21 21:39 ` Pavel Machek
2018-05-22 8:02 ` Pali Rohár
2018-05-22 19:41 ` Aaro Koskinen
2018-05-22 20:58 ` Pavel Machek
2018-05-22 21:56 ` Aaro Koskinen
2018-05-23 14:06 ` Pavel Machek
2018-05-23 20:12 ` Pavel Machek
2018-05-23 22:04 ` Tony Lindgren [this message]
2018-05-24 9:23 ` Pavel Machek
2018-05-24 9:47 ` Pavel Machek
2018-05-29 20:45 ` Pavel Machek
2018-05-29 21:09 ` Sebastian Reichel
2018-05-29 22:34 ` Pavel Machek
2018-05-23 22:02 ` Aaro Koskinen
2018-05-24 6:25 ` Tomi Valkeinen
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