fre 2015-02-20 klockan 03:03 -0800 skrev [email protected]: > For A312 and A80 they chose Imagination's PowerVR as the GPU, I don't know if > they chose the use Imagination parts for the Display Controller and VPU
A80 has mostly the same display controller and video codec engine as the other Allwinner SoC generations. The main differences in I/O space compared to sun4i is the GPU and DDR controllers. I think the PowerVR is also capable of some VPU processing so there may be some noticeable functional overlap with Allwinner IP parts there. > codec comes from coding and decoding. The VPU does more: > ColorCode conversion > Scaling > etc. Allwinner have those split in several components, with some overlap in functionality. Allwinner do not own any GPU and normal video playback do not use the GPU at all. Video playback is also possible to a memory region mapped by the GPU but far from as efficient. Things gets a little different when the VPU is merged into the GPU as the GPU is then doing many of the transforms needed. > But the Market/Marketing is stuck on the "video" term. SoC world is still much more fragmented on terminology and implementation. > That's intersting. I thought, altough it seemed odd me, the VPU was an in > house development of Allwinner. > > So the CedarX code may also be property of chipsbank. I very much doubt Allwinner do not have full control of CedarX IP (both hardware and software), even if initially developed by/with others. It is what made a market for Allwinner. But yes, there almost certainly is shared ownership/licensing involved which likely makes it troublesome for them to publish details. Regards Henrik -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
