不好的消息，树莓派显卡虽然开源了，但固件没开源还是有点不够
RTRaspberry Pi GPU Driver Turns Out To Be Crap
http://www.phoronix.com/scan.php?page=news_item&px=MTIxNDk
rasberry pi drivers are NOT useful
http://airlied.livejournal.com/76383.html
昨天很高兴地听说树莓派的显卡部分开源了，这意味着有关显卡的许多想法可能得以实现，如DIY显示屏等等（我这样觉得的啊）。
但是，今天又看到一个不大好的消息，树莓派的显示驱动开源还是不足的，因为启动时需要加载一个固件，而这个固件比较大，包含的功能也很多，其实有不少与显示相关，如“Broadcom's OpenGL ES (GLES) implementation is even lodged within this GPU driver firmware”，所以在固件没有实现开源之前，显示方面还是可能受到不少限制。。。。
David Airlie has written a blog post also writing about how this open-source Raspberry Pi graphics driver isn't too good due to the big firmware blob. This is one rare topic where David Airlie and Luc Verhaegen actually agree on something: with shoving so much into this firmware blob, including the OpenGL ES implementation, you really aren't left to be able to do much. Airlie writes on his blog, "You cannot make any improvements to their GLES implementation, you cannot add any new extensions, you can't fix any bugs, you can't do anything with it. You can't write a Mesa/Gallium driver for it. In other words you just can't."
数数这一段中的 “can’t” 就知道什么状况了，固件没有开源还是不够的。。。
想了解更详细的情况还是看看上面给的链接，英文的比较长，我也就不多说了。。。 多谢楼主提供信息.
先有先行者,慢慢来吧.
跨出第一步,以后再有第二步,或第二个人... 要开就开bootloader. 引用一段Solidot的
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Raspberry Pi基金会宣布在BSD许可证下开源其视频驱动源代码。 如果你不熟悉ARM SoC平台开源驱动现状，你可能会认为公开视频驱动源代码算不上什么大事。但实际上它是第一个由供应商提供的功能完整的ARM多媒体SoC开源驱动，以前的开源视频驱动功能不完整，是通过逆向工程开发的，Broadcom是第一家开源移动SoC GPU驱动的供应商。
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