GSoC Status update : BBB Framebuffer Project

[Christian Mauderer]

Am Mittwoch, 24. Juli 2019 schrieb Vijay Kumar Banerjee:
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> On Thu, Jul 25, 2019 at 1:17 AM Vijay Kumar Banerjee <vijaykumar9597 at gmail.com> wrote:
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> On Thu, Jul 25, 2019 at 1:09 AM Christian Mauderer <list at c-mauderer.de> wrote:
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> Hello Vijay,
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> On 24/07/2019 18:14, Vijay Kumar Banerjee wrote:
> > Hello all,
> > 
> > This is a mail to update my weekly status since the meeting got
> > canceled this week.
> 
> Sorry for that.
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> > 
> > Progress:
> > * Completed mmap patch
> > : https://lists.rtems.org/pipermail/devel/2019-July/026680.html
> > This patch is pending approval. I'm not sure if it was supposed 
> > to be merged or will it be merged after some test runs in fb or 
> > PRU?
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> I haven't tested the patch yet. I'll try to do that in the next few
> days. Sebastian reviewed it quite well so I think as soon as I've seen
> the test run on one or two platforms I can merge it. Same is true for
> your documentation patch that fixes the typos.
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> > * Added documentation for Beagle BSP
> > * Sent Patch for documenting Device
> > Tree: https://lists.rtems.org/pipermail/devel/2019-July/026775.html
> > 
> > Blocker:
> > The Initialization is still not fixed. Christian ordered a display cape
> > and will test without HDMI.
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> The display arrived today. Although still a bit distorted, I get at
> least an output on FreeBSD with an adapted device tree. Bad news is: No
> output with your fb-sample. The backlight didn't light up (which is
> expected) and I don't get any output if I search with a flashlight. I'll
> try to hack in a backlight soon but normally if there is something on
> the screen it should be at least slightly visible with enough light.
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> > 
> > Next: 
> > I'm a bit short of ideas and waiting for feedback from Christian about
> > the test using cape. Meanwhile, I'm trying to write a few docs. Also
> > wrote blog on how to write an application in libbsd for the wider audience.
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> That's a good gap filler and it's great and useful if you contribute to
> the documentation. But at least the first tests with the display didn't
> give much results. So most likely you should try some other methods of
> analysis. I think you had thought about debugging the FreeBSD kernel to
> find out the differences?
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> Thanks for the note. I will get started with the FreeBSD kernel tomorrow and compile
> it and run it through the debugger to see what it does.

It might could be possible to debug modules via some kind of kernel debugger instead of the whole kernel via a hardware debugger. I never tried that with FreeBSD but maybe it's worth to have a look at that first.
 
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> Thanks
> Best regards
> 
> Christian
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> > 
> > Thanks,
> > Vijay
> 
> PS: Sorry for sending it twice to all directly addressed. I used the
> wrong "from" address the first time so it didn't reach the list.
>

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