Re: [PATCH 00/28] Venus updates

[Stanimir Varbanov]

Hi Hans,

On  7.05.2018 13:41, Hans Verkuil wrote:
> On 24/04/18 14:44, Stanimir Varbanov wrote:
> > Hello,
> >
> > This patch set aims to:
> >
> > * add initial support for Venus version 4xx (found on sdm845).
> >
> > * introduce a common capability parser to enumerate better
> >    supported uncompressed formats, capabilities by codec,
> >    supported codecs and so on.
> >
> > * also contains various cleanups, readability improvements
> >    and fixes.
> >
> > * adds HEVC codec support for the Venus versions which has
> >    support for it.
> >
> > * add multi-stream support (secondary decoder output), which
> >    will give as an opportunity to use UBWC compressed formats
> >    to optimize internal interconnect bandwidth on higher
> >    resolutions.
>
> I'm a bit confused about this: is this a purely driver-internal thing,
> or is this exposed somehow to userspace as well? It seems to be purely
> internal.

For now it'll be internal for the driver. In downstream driver it is 
exposed to userspace via custom v4l_control but that is not generic and 
I decided to not expose it.

regards,
Stan