4.13 (and probably all recent) kernels refuse to boot on one Nokia N950, work or another

Pavel Machek
2017-10-26T09:53:43Z

On Thu 2017-10-26 11:13:26, Pavel Machek wrote:
> On Wed 2017-10-25 14:28:07, Tony Lindgren wrote:
> > * Pavel Machek <pavel@ucw.cz> [171025 13:36]:
> > > Hi!
> > >
> > > ...hardware should be identical. 3.5.3-nemo kernel seems to work on
> > > both. 4.13-rc2 with display and clock patches boots on phone "S", but
> > > does not on phone "P"; nothing nothing is received on serial port.
> > >
> > > There is some difference in the bootloaders: S's bootloader provides
> > > lots of debug info, P's is silent. R&D settings do _not_ have
> > > influence on bootloader. We know P's serial works, as 3.5.3 kernel
> > > prints "Uncompressing linux...booting" there.
> > >
> > > I'll need to return "S" phone and serial cable tommorow. If you have
> > > any ideas, let me know.
> >
> > If you get nothing out of the uart, chances are the pins are
> > not muxed for the uart in nolo and maybe kernel dts is missing the
> > pinctrl entries for uart?
> >
> > Also try booting with mem=512M at 0x80000000 or 256M or 768M. Maybe the
> > memory is different size or partially broken?
>
> Uhuh. It looks like "P" nokia really wants initrd, otherwise it will
> not boot.

No. Nokia "P" really hates command line on 0xffff command line. initrd
is optional. It also forces delay on "Warning! You have modified"
... screen.

I configured serial port. Now I get up-to working userspace (initrd)
on both "S" and "P" devices.

Welcome to MOSLO vNEMO_MOSLO-N9_0.0.13.2
Could not ioctl(OMAPFB_UPDATE_WINDOW): Inappropriate ioctl for device
check wiki.merproject.org/wiki/Nemo
Could not ioctl(OMAPFB_UPDATE_WINDOW): Inappropriate ioctl for device

Could not ioctl(OMAPFB_UPDATE_WINDOW): Inappropriate ioctl for device
Waiting for eMMC device...
Could not ioctl(OMAPFB_UPDATE_WINDOW): Inappropriate ioctl for device
eMMC device not found!

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