From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: Unable to boot mainline on snow chromebook since 3.15 Date: Wed, 10 Sep 2014 15:31:44 +0100 Message-ID: <20140910143144.GF7960@sirena.org.uk> References: <540C202E.2060009@collabora.co.uk> <540C7F5B.6070307@gmail.com> <540C83DE.10505@collabora.co.uk> <540C8577.2070907@gmail.com> <20140908112112.GK26030@arm.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="wtjvnLv0o8UUzur2" Return-path: Received: from mezzanine.sirena.org.uk ([106.187.55.193]:33101 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753121AbaIJOcT (ORCPT ); Wed, 10 Sep 2014 10:32:19 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Olof Johansson Cc: Grant Likely , Doug Anderson , Will Deacon , Tomasz Figa , "kgene.kim@samsung.com" , "linux-samsung-soc@vger.kernel.org" , Javier Martinez Canillas , "linux-arm-kernel@lists.infradead.org" , "rahul.sharma@samsung.com" , Prashanth G --wtjvnLv0o8UUzur2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Sep 10, 2014 at 06:06:46AM -0700, Olof Johansson wrote: > On Mon, Sep 8, 2014 at 12:40 PM, Grant Likely wrote: > > Well, lets see... We've got a real user complaining about a platform > > that used to work on mainline, and no longer does. The only loophole > > for ignoring breakage is if there nobody cares that it is broken. That > > currently isn't the case. So even though it's based on a patch that > > has "DO NOT SUBMIT" in large friendly letters on the front cover, it > > doesn't change the situation that mainline has a regression. > Yeah, I'm with you on this Grant, it doesn't matter what the patch is > labelled as. > One way to deal with this could be to add a quirk at boot time -- > looking for the simplefb and if found, modifies the regulators to keep > them on. That'd go in the kernel, not in firmware. Well, we should also be fixing simplefb to manage the resources it uses though that doesn't clean up after the broken DTs that are currently deployed. As well as the regulators we'll also need to fix the clocks. If we're going to start adding these fixups perhaps we want to consider having a wrapper stage that deals with rewriting DTs prior to trying to use them? I'm not sure if it makes much difference but there's overlap with other tools like the ATAGs conversion wrapper and building separately would let the fixup code run early without directly going into the early init code (which seems a bit scary). > Much better would have been if the DRM changes worked when they > landed, so that the migration form simplefb to drm was invisible to > the user. Or at least, to get them working ASAP since they're still > broken. :( As far as I can tell the problem here is coming from the decision to have simplefb use resources without knowing about them - can we agree that this is a bad idea? --wtjvnLv0o8UUzur2 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBAgAGBQJUEGDMAAoJECTWi3JdVIfQgGwH/jVRmqj9t9wek3zlWMAqWEqT f5ld4q4AatBZP0aTomuuiGNtXPdhbfwwILvS72uxMQ7kJXqJDvfdjS4jPPI+315C l0ZZAsMm6CJBqHykMH3SNKprX8Zy/hAfI8cDSjuzFOqyfG0sFCz1TVKjgsmWO1ER Au5Jm0Y3YrIKV5R5HZH1b/1VciYKyur5MGpkmnCYUI6Rj67lh7Y5Wh9dhUSEaXZ9 ze9b+LbZBqvrdcvUX8ynd1exQ7gef3NB/BkQbtXKw2vnojSSQJhrCtXH06co+KUR aojHGlt8E+gmz8hVh153MDShuF7AEPTNtSMAA85sPgf0yGB9wNKHEvd1WBRv90Q= =Yu1z -----END PGP SIGNATURE----- --wtjvnLv0o8UUzur2--