Re: [PATCH v4 0/7] VSP1: Display writeback support

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On Thu, Feb 21, 2019 at 02:23:10PM +0200, Laurent Pinchart wrote:
> On Thu, Feb 21, 2019 at 12:19:13PM +0000, Brian Starkey wrote:

[snip]

> > 
> > I used a pre-existing internal tool which does exactly that.
> 
> Any hope of sharing the sources ?
> 

Not in a timescale or form which would be useful to you. I'm convinced
people only ask questions like this to make us look like Bad Guys.

Opening everything up is a process, and it's going to take us time.
Sure we could be doing better, but I also think there's a lot of
people who do worse.

> > I appreciate that we don't have upstream tooling for writeback. As you
> > say, it's a young API (well, not by date, but certainly by usage).
> > 
> > I also do appreciate you taking the time to consider it, identifying
> > issues which we did not, and for fixing them. The only way it stops
> > being a young API, with bugs and no tooling, is if people adopt it.
> 
> If the developers who initially pushed the API upstream without an
> open-source test tool could spend a bit of time on this issue, I'm sure
> it would help too :-)
> 

No one suggested a test test tool before. In fact, the DRM subsystem
explicitly requires that features land with something that isn't only
a test tool, hence why we did drm_hwcomposer.

That said, yes, we should be trying harder to get the igts landed. I
personally think igts are far more useful than a random example C
file, but I guess opinions differ.

Thanks,
-Brian





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