From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965953AbeEXJXq (ORCPT ); Thu, 24 May 2018 05:23:46 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:39140 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965831AbeEXJXo (ORCPT ); Thu, 24 May 2018 05:23:44 -0400 Date: Thu, 24 May 2018 11:23:41 +0200 From: Pavel Machek To: Tony Lindgren Cc: Aaro Koskinen , Pali =?iso-8859-1?Q?Roh=E1r?= , sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, 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 Subject: Re: v4.17-rc1: regressions on N900, N950 Message-ID: <20180524092341.GA6349@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> <20180523201208.GA31731@amd> <20180523220456.GY98604@atomide.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Qxx1br4bt0+wmkIi" Content-Disposition: inline In-Reply-To: <20180523220456.GY98604@atomide.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Qxx1br4bt0+wmkIi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed 2018-05-23 15:04:56, Tony Lindgren wrote: > * Pavel Machek [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, > > > >=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 new= er kernels), > > > > > > but if you say the probe order is random then we must find some= proper 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 goin= g on > > > > > there. > > > >=20 > > > > My bisection pointed to 6fa7324ac5489ad43c4b6351355b869bc5458bef wh= ich > > > > doesn't seem to make any sense...?! So maybe there really is someth= ing > > > > 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). > >=20 > > Deleting tsc2005@0 entry also breaks screen. > >=20 > > Replacing tsc2005@0 entry with=20 > >=20 > > foobar@0 { > > compatible =3D "not really with anything"; > > spi-max-frequency =3D <6000000>; > > reg =3D <0>; > > }; > >=20 > > still results in working touchscreen, removing any of the three fields > > breaks it again. >=20 > I bisected one regression down, see "omapdrm regression in v4.17-rc serie= s" > not sure if it covers all the issues being discussed here though. This is something else... Video was very sensitive basically to random stuff, even in v4.16, and I tried to debug that. If I remove dts support for touchscreen, video stops working -- and that's bad. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --Qxx1br4bt0+wmkIi Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlsGhJ0ACgkQMOfwapXb+vIAWwCgtO6RO1J7UnZXtIvUFdRPbpny 84AAoLCUbvApJcMWlJ6/Z06/ZHy9NmR7 =WAKn -----END PGP SIGNATURE----- --Qxx1br4bt0+wmkIi--