[yocto] [meta-raspberrypi] Purpose of vc-graphics-hardfp.bb & vc-graphics.bb unclear

[Alex J Lennon]

On 03/06/2014 15:31, Felix01 Fischer wrote:
> Hello all,
>
> my ongoing struggle to get qt5 working on the raspberrypi led me to a
> question unrelated to qt5.
>
> why do vc-graphics-hardfp.bb & vc-graphics.bb exist? [1]
> There is no recipe which uses on of this files.
> If I add one of them to my image via IMAGE_INSTALL_append I get errors
> that userland.git and vc-grapics-hardfp both provide virtual/egl and
> virtual/libgles2.
> (Which they obviously do.) [2]
>
> My question is: What is the reason for having userland_git.bb &
> vc-graphics.bb/vc-graphics-hardfp ?
>

Hi Felix,

I'm not sure, but I've been looking at userland vs vc-graphics recently
and I believe it is historical.

Originally the intermediate layer between userspace and the videocore
was distributed as binaries
which is what vc-graphics pulls down

ref: https://github.com/raspberrypi/firmware/tree/master/opt/vc

More recently Broadcom opened up the source and provided it under a more
relaxed license, and this
is what userland provides:

ref: http://www.raspberrypi.org/open-source-arm-userspace/
ref: https://github.com/raspberrypi/userland

Somebody will no doubt correct me if my guess is wrong :)

I have been using userland + gstreamer reasonably sucessfully here
although my patch is needed for some
of the userspace apps (e.g. raspivid), and there are some configuration
issues that need patching still
relating to gstreamer1.0-omx

ref: https://github.com/raspberrypi/userland/pull/179

Cheers,

Alex

> Two things are notable, IMHO:
>
> vc-graphics.inc has two files specified.
> One packageconfig (.pc) file with the right includes. I had to add one
> library manually in order to get qt5 compiling
> and the other one is a startup script for initalising the videocore.
>
> Are these two files deprecated by now? The last change to a file in
> the vc-graphics folder has been made 2013-08-21
> Or do I need at least the initscript to get the videocore working?
>
> Regards,
>
> Felix Fischer
>
> [1]
> http://git.yoctoproject.org/cgit/cgit.cgi/meta-raspberrypi/tree/recipes-bcm/vc-graphics/
>
> [2]
> http://git.yoctoproject.org/cgit/cgit.cgi/meta-raspberrypi/tree/recipes-graphics/userland/userland_git.bb
>
>
>
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