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FLOSS graphics driver?

The AM335x inside the OSD335x uses an SGX hardware core. You can see more details: https://eewiki.net/display/linuxonarm/BeagleBone+Black#Beagl...

So the answer is "no", since it depends on the blobs from TI. That's too bad.

The SGX is an accelerator. You can run 2D graphics fine with the omapdrm driver from kernel.org. At least, that's how it is on the AM437x.

The AM335x has the same SGX accelerator as the AM437x so it has the same 2D/3D basic behavior. For more information on the software architecture see: http://processors.wiki.ti.com/index.php/Processor_Linux_SDK_...