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Date:   Thu, 26 Oct 2017 10:24:19 +0200
From:   Pavel Machek <pavel@....cz>
To:     Pali Rohár <pali.rohar@...il.com>
Cc:     Filip Matijević <filip.matijevic.pz@...il.com>,
        sre@...nel.org, kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com,
        clayton@...ftyguy.net, martijn@...xit.nl,
        sakari.ailus@...ux.intel.com
Subject: Re: 4.13 (and probably all recent) kernels refuse to boot on one
 Nokia N950, work or another

Hi!
On Thu 2017-10-26 09:32:36, Pali Rohár wrote:
> On Thursday 26 October 2017 09:27:59 Pavel Machek wrote:
> > Hi!
> > 
> > On Thu 2017-10-26 09:21:13, Pali Rohár wrote:
> > > On Thursday 26 October 2017 09:08:15 Pavel Machek wrote:
> > > > On Thu 2017-10-26 08:25:02, Filip Matijević wrote:
> > > > > Last time I couldn't get output on serial I used CONFIG_DEBUG_LL,
> > > > > CONFIG_DEBUG_OMAP3UART3, CONFIG_EARLY_PRINTK... and ignore_loglevel
> > > > > earlyprintk kernel params to get output early enough - I guess you
> > > > > already tried that.
> > > > 
> > > > I realized I'm not getting output from the decompessor (even on "S"
> > > > machine), and enabled that.
> > > 
> > > That is because you have not enabled those EARLY PRINK or DEBUG LL.
> > > Similar thing is needed for N900 and IIRC in some of my linux-n900
> > > branches I have config for it. Plus it needs patching some arch/arm
> > > source files to make it working.
> > 
> > Do you have a patch? That would be very useful.
> 
> Yes, in v4.9-n900 branch, see:
> https://github.com/pali/linux-n900/commit/66b22ba4132ca90f7efc3f9e8ece8d4b9adddcdc

Thanks for a pointer; but I still don't see how this is supposed to
work:

arch/arm/include/debug/uncompress.h provides empty static inline void
arch_decomp_setup(void) {}

...?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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