[PATCH] Add framebuffer in BBB

[Vijay Kumar Banerjee]

On Fri, Jul 26, 2019 at 6:42 PM Vijay Kumar Banerjee <
vijaykumar9597 at gmail.com> wrote:

>
>
>
> On Fri, Jul 26, 2019 at 5:11 PM Christian Mauderer <
> christian.mauderer at embedded-brains.de> 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.
>>
>> I'll reorder them and push to remote today and add it in this thread.
>
Pushed it here:
https://github.com/thelunatic/rtems-libbsd/tree/framebuffer

> 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.
>>
>> am335x_lcd is the prerequisite for fbd.
>
>> > [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?
>>
>> I tried without it, it's giving some noise in the screen and the the open
> call to framebuffer is returning error without vt. I guess the vt
> initialization
> is necessary.
>
>> > [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.
>>
>> OK. I'll put it in the first.
>
>> Best regards
>>
>> Christian
>> --
>> --------------------------------------------
>> embedded brains GmbH
>> Herr Christian Mauderer
>> Dornierstr. 4
>> D-82178 Puchheim
>> Germany
>> email: christian.mauderer at embedded-brains.de
>> Phone: +49-89-18 94 741 - 18
>> Fax:   +49-89-18 94 741 - 08
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>>
>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>>
>
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