On 08/11/15 15:56, Laurent Pinchart wrote:
>
> Hijacking this e-mail thread a bit, would it make sense for the new vb2-core
> to support different memory allocation for different planes ? I'm foreseeing
> use cases for buffers that bundle image data with meta-data, where image data
> should be captured to a dma-buf imported buffer, but meta-data doesn't need
> to
> be shared. In that case it wouldn't be easy for userspace to find a dma-buf
> provider for the meta-data buffers in order to import all planes. Being able
> to use dma-buf import for the image plane(s) and mmap for the meta-data plane
> would be easier.
Yes, that would make sense, but I'd postpone that until someone actually needs
it.
The biggest hurdle would be how to adapt the V4L2 API to this, and not the
actual
vb2 core code.
Regards,
Hans
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