[Buildroot] AM3517 Neon, OpenGL & EGLFS support

Charles Krinke charles.krinke at gmail.com
Fri Jun 7 15:40:40 UTC 2013

Dear Thomas:

You touch on the key piece of understanding I am seeking.
Unfortunately some of this understanding is obfuscated by similar
terms used by different groups.

In the AM3517, there is a source tree called the "Graphics_SDK". And
it contains, I believe, EGL and OpenGL implementations for the AM3517
and other SoC from TI. Wojciech patch does define several variables
which include headers and libraries for Qt.

I *think* we are 99% there and the missing part is this library
constant from Raspberry Pi, but, ... because all the alphabet soup is
different between Ti, Qt, and the rest of the opensource community, we
get to deal with ambiguity a bit.

On 6/7/13, Thomas Petazzoni <thomas.petazzoni at free-electrons.com> wrote:
> Dear Charles Krinke,
> On Fri, 7 Jun 2013 07:44:09 -0700, Charles Krinke wrote:
>> I can seem to get past this error by enabling "rpi-userland" which
>> does define LIBGLES_DEPENDENCIES, but this seems like the wrong answer
>> to me.
> Enabling rpi-userland provides an EGL implementation that works on the
> RasberryPi, so obviously, this isn't going to work for you.
>> Perhaps there is a different configuration setting somewhere
>> else that defines sufficient configuration for the AM3517 that I have
>> missed?
> Spenser is creating a Buildroot package that properly packages the
> OpenGL/EGL implementation for OMAP/AM3xxx. I hope he can post that soon.
>> I just did a make clean && make after defining "rpi-userland" and the
>> compilation completed with a libQt5OpenGL.so.5.0.2 about 300KBytes in
>> size, so something seems to have worked.
>> Would it be correct that LIBGLES_DEPENDENCIES may just have to be
>> defined to "anything" so we could put into qt5base/qt5.mk a line that
>> says
>> LIBGLES_DEPENDENCIES += any_string_will_do
>> and expect success?
> Well, if you install manually your OpenGL and EGL libraries, maybe. But
> that's ugly. The libegl and libopengl packages are virtual packages,
> and one package is supposed to provide one EGL and one OpenGL
> implementation for your specific SoC.
> Spenser, can you update us on your patches? Even if there's not fully
> ready, posting them with a RFC tag would allow Charles and Wojchiech to
> experiment with them.
> Thanks!
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com

Charles Krinke

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