From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: v4.17-rc1: regressions on N900, N950 Date: Wed, 23 May 2018 22:12:08 +0200 Message-ID: <20180523201208.GA31731@amd> References: <20180422074213.GA12428@amd> <20180423202940.ig6iud5lrbgnu35a@darkstar.musicnaut.iki.fi> <20180521213952.GA11596@amd> <20180522080250.4fzyvqrgw5oigexn@pali> <20180522194139.GB2299@darkstar.musicnaut.iki.fi> <20180522205824.GA24927@amd> <20180522215638.GC2299@darkstar.musicnaut.iki.fi> <20180523140615.GA27180@amd> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="17pEHd4RhPHOinZp" Return-path: Content-Disposition: inline In-Reply-To: <20180523140615.GA27180@amd> Sender: linux-kernel-owner@vger.kernel.org To: Aaro Koskinen Cc: Pali =?iso-8859-1?Q?Roh=E1r?= , sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com, clayton@craftyguy.net, martijn@brixit.nl, sakari.ailus@linux.intel.com, Filip =?utf-8?Q?Matijevi=C4=87?= , Thorsten Leemhuis List-Id: linux-omap@vger.kernel.org --17pEHd4RhPHOinZp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed 2018-05-23 16:06:15, Pavel Machek wrote: > On Wed 2018-05-23 00:56:38, Aaro Koskinen wrote: > > Hi, > >=20 > > 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 k= ernels), > > > > but if you say the probe order is random then we must find some pro= per way > > > > to express the dependency. > > >=20 > > > I started bisect, but.. that will probably not be useful. > > >=20 > > > If your device works ok in v4.17-rc1, it probably works in newer -rcs, > > > too. > >=20 > > Actually, my statement may be bogus... Now I tried again with -rc1 > > (and also -rc6) and it fails... But v4.16 works. > >=20 > > > Thanks for the ordering hint, I'll try to figure out what is going on > > > there. > >=20 > > My bisection pointed to 6fa7324ac5489ad43c4b6351355b869bc5458bef which > > doesn't seem to make any sense...?! So maybe there really is something > > random stuff going on? :-( >=20 > So... I did some experiments on v4.16. >=20 > Swapping tsc2005@0 and lcd: acx565akm@2 entries in the dts does break > stuff. >=20 > 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=20 foobar@0 { compatible =3D "not really with anything"; spi-max-frequency =3D <6000000>; reg =3D <0>; }; still results in working touchscreen, removing any of the three fields breaks it again. Strange. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --17pEHd4RhPHOinZp Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlsFyxgACgkQMOfwapXb+vLdDQCgkCKWjSyNytj6PT12s7CERMvO ehYAoKrocE8H8CztHndbQs/B8rySpV1Z =wPBm -----END PGP SIGNATURE----- --17pEHd4RhPHOinZp--