[Spice-devel] [virtio-dev] Re: [PATCH v2 0/1] VirtIO video device specification

[Dmitry Sepp]

Hi Gerd,

Thanks for reviewing!

On Montag, 13. Januar 2020 10:56:36 CET Gerd Hoffmann wrote:
>   Hi,
> 
> > This also means that we cannot have unspec for planes layout. Device
> > either
> > expects planes in separate buffers or in one buffer with some offsets,
> > there cannot be mixed cases.
> 
> Hmm.  Is it useful to support both?  Or maybe support the "one buffer +
> offsets" case only?  Splitting one buffer into multiple smaller ones
> internally if needed shouldn't be a problem, and it would simplify the
> interface a bit ...
> 

Ok, let's consider the following case:
 - the device expects planes in separate buffers.
 - say, Android on the guest side also imports planes in separate buffers into the driver.
 - but he driver only supports one buffer + offsets.

Do you mean the driver then can join the underlying page lists and set offsets then? Yes, 
this would probably make sense.

Regards,
Dmitry.

> cheers,
>   Gerd
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