Originally posted by Sonadow
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1. The initial v1 dma_buf patches landed in 3.3. This allows sharing buffers between drivers
2. Dave's "Prime" work builds on the dma_buf patches to allow buffer sharing between KMS drivers for things like hybrid graphics on laptops
3. Reworking the X server to handle decoupled rendering and display
Until all of that falls into place, it will always be a hack. There isn't really any magic involved. One GPU renders, the other GPU composites the result to the screen. Anyone can help out.
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