Beagleboard BSP Framebuffer

[Christian Mauderer]

Am 12.03.19 um 10:52 schrieb Vijay Kumar Banerjee:
> 
> 
> On Mon, 11 Mar 2019 at 19:21, Gedare Bloom <gedare at rtems.org
> <mailto:gedare at rtems.org>> wrote:
> 
> 
> 
>     On Sun, Mar 10, 2019 at 7:31 PM Joel Sherrill <joel at rtems.org
>     <mailto:joel at rtems.org>> wrote:
> 
>         The MINIX license is BSD with advertising clause as I read it.
>         That is less preferable to a 2-paragraph BSD license that you
>         are likely to find in Freebase. Try there.
> 
>     The license is fine if you find nothing else. I assume Joel meant
>     FreeBSD.
> 
>     Study the framebuffers in i386 and raspberrypi code bases.
> 
> 
> Hello,
> 
> Thanks for the reference, I found the tda19988 driver in freebsd source.
> Following the raspberrypi framebuffer, I have made a header file with the 
> basic functions to implement. The implementation will be using the 
> driver code from the freebsd. 
> 
> What needs to be figured out next is how to use the driver code with rtems,
> since the file uses a lot of header files from the freebsd source, how do we
> go about integrating it with rtems? Is there any guide on using codes from 
> different projects into RTEMS? 
>  
> 

Hello Vijay,

for FreeBSD we have the libbsd as an easy way to integrate sources and
keep them up to date. Although I don't think that we have a framebuffer
driver there yet I would expect that it is a good method for that too.

Best regards

Christian

>      
> 
>         It is usable in RTEMS though. We just try to avoid pushing the
>         advertising requirement
> 
> 
> 
>         On Sun, Mar 10, 2019, 12:47 PM Vijay Kumar Banerjee
>         <vijaykumar9597 at gmail.com <mailto:vijaykumar9597 at gmail.com>> wrote:
> 
> 
> 
>             On Fri, Mar 8, 2019, 12:35 AM Vijay Kumar Banerjee
>             <vijaykumar9597 at gmail.com <mailto:vijaykumar9597 at gmail.com>>
>             wrote:
> 
>                 Hi,
> 
>                 I was reading up and trying to figure out the steps to
>                 achieve this project. Here's
>                 what I came up with :
> 
>                 1. BBB uses TD19988 HDMI Framer, so the first step is to
>                 get an HDMI output,
>                 read EDID info and set the videomode according to the
>                 info. After some searching,
>                 I found a driver in minix that might be helpful. Is the
>                 minix license compatible? 
>                 (https://github.com/Stichting-MINIX-Research-Foundation/minix/blob/03ac74ede908465cc64c671bbd209e761dc765dc/LICENSE)
> 
>                 2. Set the values of structs from fb.h 
>                 3. Write the fb.c using the functions from framebuffer.h
>                 ( I'm taking the fb.c in raspberrypi 
>                 as example and the bsp-howto as a reference text)
> 
>                 The above list is just an outline and I intend to
>                 explore/understand it better and make a
>                 proposal out of it.
> 
>                 Does this list make sense to you? 
> 
>                 What am I missing?
> 
>                 I would really appreciate any remarks/comments or
>                 details you'd like to add, it will help me understand it
>                 better.
> 
>             ping :)
> 
> 
>                 Thanks,
>                 --vijay
> 
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> 

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