[PATCH] Add framebuffer in BBB

[Vijay Kumar Banerjee]

On Sat, Jul 27, 2019 at 7:37 PM Christian Mauderer <list at c-mauderer.de>
wrote:

> On 26/07/2019 13:41, Christian Mauderer wrote:
> > On 26/07/2019 13:22, Vijay Kumar Banerjee wrote:
> >> Hello everyone!
> >>
> >> I'm excited to post the following patchset. With this patchset
> >> I have the framebuffer working in BBB and have tested it with a
> >> BBB revC with HDMI connected Screen.
> >>
> >> This patchset uses mmap and hence it's necessary to apply the
> >> patche ON TOP OF mmap patch to avoid merge conflict.
> >>
> >> In reply to this mail, I'll be attaching a picture of the screen
> >> where my rectangle drawing application made a nice red rectangle
> >> on the screen just like in FreeBSD.
> >>
> >> Thanks and regards,
> >> Vijay
> >>
> >
> > Hello Vijay,
> >
> > it's great that you now have a working driver. Well done.
> >
> > I hadn't had a look at most patches yet and most likely that will need a
> > bit of time. It's a lot of stuff. Most likely the bigger patches won't
> > reach the mailing list so maybe adding a link to a branch on your github
> > repo would be good.
> >
> > Note: Please don't send a v2 right now. I'm sure there are more comments
> > (maybe not only from me). Collect comments for at least one or two days
> > and create an update afterwards.
> >
> > Some notes reading the patch overview:
> >
> >> [PATCH 01/10] TDA19988 : Import from FreeBSD
> >> [PATCH 02/10] TDA19988 : port to RTEMS
> >> [PATCH 03/10] am335x display drivers: Import from FreeBSD
> >> [PATCH 04/10] am335x display drivers : Port to RTEMS
> >> [PATCH 05/10] fbd : Import from FreeBSD
> >> [PATCH 06/10] fbd : Port to RTEMS
> >
> > Is fbd a prerequisite of am335x_lcd? In that case it would have been
> > better to reorder the patches. As long as every version compiles (to
> > allow git bisect) I would accept that order too. But as a general rule
> > prerequisites should be prior to the parts that use it.
> >
> >> [PATCH 07/10] VT : Import from FreeBSD
> >> [PATCH 08/10] VT : Port to RTEMS
> >
> > Is the vt still necessary? I think it was an intermediate step to try
> > whether it's initializing the display. Did you try without it?
> >
> >> [PATCH 09/10] TI Pinmux : Import from FreeBSD
> >> [PATCH 10/10] TI Pinmux : Port to RTEMS
> >
> > Again: prerequisite. So they should be one of the first.
> >
> > Best regards
> >
> > Christian
> >
>
> One general question: When trying the patches, my monitor has been set
> up as 1440x900 instead of it's native resolution. Did you check whether
> the resolution on your screen is set correctly?
>
> It's not setting fb with the "preferred videomode", I can confirm that the
resolution
set by FreeBSD and RTEMS is same.

> Best regards
>
> Christian
>
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