RE: SIMpad kernel in OE

Hi Alex

The problem you describe happens when the MQ200 is not initialised at all.
The LCD does not get any signal at all and the pixels slowly turn white.
The Linux kernel driver for the MQ200 in 2.4.18 has code to initialise the chip even
if the bootloader did not. Maybe this code is missing in 2.4.19.

I can't remember what code it was. I will need to check.

Regards
Walter

> -----Original Message-----
> From: Alex Lange [mailto:[email protected]]
> Sent: Friday, April 02, 2004 11:41 AM
> To: Juergen Messerer
> Cc: [email protected]
> Subject: Re: [Simpad-general] SIMpad kernel in OE
> 
> 
> Hi,
> 
> the screen doesn't show anything when booting, it's just 
> black (turning white 
> after some time)
> 
> Alex
> 
> On Friday 02 April 2004 09:14, you wrote:
> > Okay I think I know the problem. Another question..
> >
> > Do you call mq200_on over the following line:
> >
> > COMMAND(mq200_on, mq200_on, "turn on the mq200 display", 
> BB_RUN_FROM_RAM);
> >
> > Does the screen show somthing during the boot process?
> >
> >
> > If  the initialization of the mq200 doesn't work properbly 
> then we have
> > to add some lines directly
> > to the kernel driver.
> >
> > I know that Walter had a similar problem when we played 
> around with the
> > current bootloader.
> >
> > He left out the mq200 part from the bootloader but then the kernel
> > didn't boot.
> > So he had to add some lines from the bootloader to kernel 
> mq200 driver.
> >
> > I have asked him allready. I hope we can get an answer soon.
> >
> > I will test it than tomorrow maybe today.
> >
> > regards
> >
> > Juergen
> >
> > Alex Lange wrote:
> > >Hi Juergen,
> > >
> > >it's indeed 2.4.19-rmk7-jpm2. The kernel boots fine up to 
> initialising the
> > >framebuffer. I just get "set_mqmode before reset" or 
> something like this,
> > >can't remember exactly. When compiling the kernel without 
> mw200fb support,
> > > it boots fine.
> > >
> > >Alex
> > >
> > >On Thursday 01 April 2004 17:31, you wrote:
> > >>He Alex,
> > >>
> > >>which kernel did you used ?
> > >>
> > >>2.4.19-rmk7-jpm2 ?
> > >>
> > >>Does it hang just in the beginning? No output or so?
> > >>
> > >>regards
> > >>
> > >>Juergen
> > >>
> > >>Alex Lange wrote:
> > >>>Hi Chris,
> > >>>
> > >>>the kernel partition will be removed with the new 
> bootloader we'll just
> > >>>have a 256KB bootloader partition and the rest will be 
> root. It's just
> > >>>the mq200 that doesn't work yet and which causes the 
> kernel to hang
> > >>> while booting. I hope Walter/Juergen will find a way to 
> fix this. I
> > >>> don't have enough hardware info right now.
> > >>>
> > >>>Alex
> > >>>
> > >>>On Thursday 01 April 2004 09:40, Chris Martin wrote:
> > >>>>Hi Alex,
> > >>>>
> > >>>>I'm still here. And it looks like I'll be able to get 
> involved some
> > >>>> more again.
> > >>>>Since OZ Buildroot is more or less stalled and OE isn't 
> far enough that
> > >>>>we can build Images for the SIMpad from it, it may be 
> better to just
> > >>>>build some images for testing purposes. I think an 
> official release is
> > >>>>only meaningful when we have a common base system.
> > >>>>For instance if you were to build your images based on 
> familiar then it
> > >>>>would be a little different than what was created from 
> OZ. Now that
> > >>>>hh.org is contributing to OpenEmbedded (which is very 
> good news!!) the
> > >>>>possibility of having a common base for Opie and GPE 
> (or whatever else
> > >>>>is worth while) images for the SIMpad just increased greatly.
> > >>>>
> > >>>>As soon as the bootldr works you may want to write up a 
> small HOWTO on
> > >>>>getting that on the SIMpad without JTAG. This will be 
> essential before
> > >>>>releasing it to the public ;-)
> > >>>>But, whip up an Image for testing purposes and I'll 
> test it a bit.
> > >>>>BTW: can we do away with the seperate kernel partition 
> when using the
> > >>>>new bootldr. I hope so, since this makes it a pain when 
> it gets down to
> > >>>>updating kernel stuff. I would like to be able to 
> update the kernel via
> > >>>>ipkg like I can on my ipaq.
> > >>>>
> > >>>>So, now I need to get familiar with OE and help there a 
> little ;-) I'm
> > >>>>also going to get involved with the port to the ipaq 
> 2210 (maybe LAB
> > >>>>also). So I have alot to do :)
> > >>>>
> > >>>>Regards,
> > >>>>Chris Martin
> > >>>>
> > >>>>Alex Lange wrote:
> > >>>>>Hi,
> > >>>>>If the new bootloader is working, I'll build some 
> simpad images if no
> > >>>>>one else will do it.
> > >>>>>
> > >>>>>Alex
> > >>>>>
> > >>>>>On Wednesday 31 March 2004 17:48, Michael Lauer wrote:
> > >>>>>>I'm not sure if anyone is still interested in SIMpad stuff,
> > >>>>>>however fyi: I added two SIMpad kernels to OpenEmbedded,
> > >>>>>>
> > >>>>>>1.) 2.4.19-rmk7-jpm2 - as appearing in OpenSIMpad 0.8.1
> > >>>>>>and
> > >>>>>>2.) 2.4.25-vrs2-pxa1-jpm1. No idea if that thing boots, but I
> > >>>>>> forwarded ported the jpm2 patches.
> > >>>>>>
> > >>>>>>Kernel 2.6.4 should just be a matter of forward 
> pushing zecke's
> > >>>>>> patches which are in buildroot.
> > >>>>>>
> > >>>>>>Now volunteers could start adding some missing SIMpad device
> > >>>>>> specifics into OpenEmbedded and then there could be 
> new OpenSIMpad
> > >>>>>> releases...
> > >>>>>
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