linux-kernel - Re: linux 4.2-rc1 broken Nokia N900

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Message-ID: <20150724105219.GF10476@pali>
Date:	Fri, 24 Jul 2015 12:52:19 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Dave Young <dyoung@...hat.com>
Cc:	Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...nel.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Tony Lindgren <tony@...mide.com>, Nishanth Menon <nm@...com>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux 4.2-rc1 broken Nokia N900

On Friday 24 July 2015 18:33:51 Dave Young wrote:
> Hi, Pali
> 
> On 07/24/15 at 10:40am, Pali Rohár wrote:
> > On Friday 24 July 2015 16:18:09 Dave Young wrote:
> > > On 07/11/15 at 02:05pm, Pali Rohár wrote:
> > > > Hello,
> > > > 
> > > > now I tested 4.2-rc1 release on Nokia N900 and couple of drivers are
> > > > broken and cause kernel oops...
> > > > 
> > > > Basically wifi, touchscreen and rtc drivers not working...
> > > > 
> > > 
> > > Pali, could you tell how do you test mainline kernel on n900?
> > > 
> > > I used to use n900 as a usb dbgp gadget with a backport patch to
> > > 2.6.28 so that I can get early debug kernel message from my laptop.
> > > 
> > > I tried mainline previously with Fedora arm, text mode works but
> > > no graphics. Is there a way to use maemo UI with mainline kernel?
> > > 
> > > Thanks
> > > Dave
> 
> 
> > 
> > Hi! Starting Maemo with mainline kernel is not possible. But you can
> > patch Maemo (userspace) and apply some kernel patches and you could boot
> > Maemo system with Hildon UI.
> 
> So I think mainline miss some patches in your linux-n900, I guess they
> are for SGX graphic driver?
> 

Yes. Status of kernel driver is here: http://elinux.org/N900

> > 
> > You need:
> > 
> > Patched kernel:
> > https://github.com/pali/linux-n900
> > 
> > CSSU-devel:
> > https://wiki.maemo.org/CSSU
> > http://talk.maemo.org/showthread.php?t=84292
> > 
> > Open source battery management:
> > http://talk.maemo.org/showthread.php?t=93183
> > 
> > Fixup for Dialer application (rtcom-call-ui):
> > Fixing HAL path /org/freedesktop/Hal/devices/platform_soc_audio_logicaldev_input
> > 
> > Fixup for SGX video driver:
> > Fixing script /etc/event.d/sgx
> > 
> > If you do not know how to fix HAL & SGX script I can send you later
> > needed information. But I do not know them right now.
> 
> Yes, appreciated for that, just at anytime later you find it.
> I have no much time either, so I believe first I need a lot of spare time to read
> the threads you mentioned.
> 
> Thanks
> Dave

Just first post of those threads should be enough.

-- 
Pali Rohár
pali.rohar@...il.com
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