No display for running framebuffer.run

[Aditya Kousik]

Hi Stefan,

On 12 Mar 2014 16:47, "Stefan Kalkowski" <stefan.kalkowski at ...1...>
wrote:
>
> Hi Aditya,
>
> the framebuffer driver for Freescale's IPUv3 device is expected to work
> out of the box when using the i.MX53 SABRE tablet, as well as the i.MX53
> Quickstart Board. Both configurations work with statically assigned
> resolutions.
>
> To let it work on your concrete i.MX6 board, you've to adapt the driver
> code to use appropriated DMA channels, correct timings, as well as an
> appropriated resolution. Moreover, typically you've to do something to
> enable the display, like GPIO + IOMUX controller routings, which is done
> for the mentioned boards in the platform driver of Genode.

Yes, even I'm using the Linux and u-boot driver routines as base. And your
exquisite version for the i.mx53 as reference. The initialisation routine
for i.mx6 though similar, is not entirely same. The CCM defs and protocols
are a bit different since I.MX6 has two IPU units.
>
> I'm afraid, I can't help you with an easy way to debug it. When doing
> the same work for e.g. the SABRE tablet, I've traced the available Linux
> driver to find out, what needs to be done in general. I'm afraid the
> documentation, although substantial with respect to register
> definitions, isn't sufficient to build it from scratch.
>

And as far as IOMUXC+GPIO pads are concerned, we've written a macro that
sets the display on (though it's unclear as to which pin to set to do
that). We first wrote the macro in the driver space itself, but Genode's
excellent RM service threw a faulted error. So as a ready-reckoner, put the
code at kernel level. No positive result, unfortunately.

> Of course there are other run scripts that make use of the framebuffer,
> like for instance 'os/run/demo.run'.
>
> Regards
> Stefan
>

Can you shed some light on why the following exception is thrown? "C++
runtime: Genode::Parent::Service_denied". I tried running the nitpicker
test directly and the service goes to abort() from the boot_modules.

Best,
Aditya.

> On 03/12/2014 11:52 AM, Aditya Kousik wrote:
> > Hi Christian,
> >
> > We're basically running tests for our framebuffer driver on our Genode
port
> > for i.MX6 board. Similar results. No concrete display on the LVDS
display.
> > The screen gets pixelated gradually from black to complete white. While
> > this could be a fault with the driver, it'll still be good to know how
to
> > debug it. What ARM board did you carry out your experiments with?
> >
> > Also, are there other run scripts to test framebuffer?
> >
> > ----
> > Aditya.
> >
> >
> > On Wed, Mar 12, 2014 at 4:12 PM, Christian Helmuth <
> > christian.helmuth at ...1...> wrote:
> >
> >> Hello Aditya,
> >>
> >> it seems you discovered a bug in the framebuffer test.
> >>
> >> On Wed, Mar 12, 2014 at 03:50:14PM +0530, Aditya Kousik wrote:
> >>> I've tried running the test-framebuffer on my linux_x86 base. The
> >> terminal
> >>> log session sends debug message of "blue", "green", "red" etc. But
> >> nothing
> >>> shows on the QEMU monitor. What could be going wrong here?
> >>
> >> I opened issue #1092 on Github for tracking developments. Please feel
> >> invited to investigate further on the issue and discuss your findings
> >> under
> >>
> >>   https://github.com/genodelabs/genode/issues/1092
> >>
> >> Regards
> >> --
> >> Christian Helmuth
> >> Genode Labs
> >>
> >> http://www.genode-labs.com/ · http://genode.org/
> >> https://twitter.com/GenodeLabs · /ˈdʒiː.nəʊd/
> >>
> >> Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden
> >> Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
> >>
> >>
> >>
------------------------------------------------------------------------------
> >> Learn Graph Databases - Download FREE O'Reilly Book
> >> "Graph Databases" is the definitive new guide to graph databases and
their
> >> applications. Written by three acclaimed leaders in the field,
> >> this first edition is nowavailable. Download your free book today!
> >> http://p.sf.net/sfu/13534_NeoTech
> >> _______________________________________________
> >> Genode-main mailing list
> >> Genode-main at lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/genode-main
> >>
> >
> >
> >
> >
------------------------------------------------------------------------------
> > Learn Graph Databases - Download FREE O'Reilly Book
> > "Graph Databases" is the definitive new guide to graph databases and
their
> > applications. Written by three acclaimed leaders in the field,
> > this first edition is now available. Download your free book today!
> > http://p.sf.net/sfu/13534_NeoTech
> >
> >
> >
> > _______________________________________________
> > Genode-main mailing list
> > Genode-main at lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/genode-main
> >
>
> --
> Stefan Kalkowski
> Genode Labs
>
> http://www.genode-labs.com/ · http://genode.org/
>
>
------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and their
> applications. Written by three acclaimed leaders in the field,
> this first edition is now available. Download your free book today!
> http://p.sf.net/sfu/13534_NeoTech
> _______________________________________________
> Genode-main mailing list
> Genode-main at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/genode-main
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.genode.org/pipermail/users/attachments/20140312/612881e5/attachment.html>