Phoronix: An Open-Source GLES Driver For Samsung's Galaxy GPU

Embedded Linux GPU driver support is a great big mess. There's no doubt about it. There's some partial open-source driver code, but nothing that's been quite popular or welcomed for integration into the mainline Linux kernel. There might be an open-source PowerVR SGX driver later in the year, but that's still months out. However, with more mobile Linux devices emerging that utilize these closed-up ARM GPUs, clean-room reverse engineering to write open-source drivers is going to be inevitable unless the vendors step up their Linux support game...

http://www.phoronix.com/vr.php?view=OTAzNg