Re: KMS documentation for userspace

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On Sat, Jun 22, 2019 at 11:42 AM Simon Ser <contact@xxxxxxxxxxx> wrote:
> On Wednesday, June 19, 2019 10:53 PM, Daniel Vetter <daniel@xxxxxxxx> wrote:
> > tldr; Yes, I just didn't get around to it yet.
> >
> > The rough plan is to actually document ioctls and properties and all
> > that stuff in drm-uapi.rst, and then cross-link that with the
> > driver-side documentation.
>
> I'm confused regarding drm-uapi.rst's role. Is it a document for kernel driver
> writers to expand the uAPI, or is it a document for userspace?
>
> It's currently filled with references to internal kernel symbols
> (drm_master_get, drm_ioctl_desc, drm_ioctl_permit and so on). Some chapters seem
> dedicated to kernel devs (e.g. "Testing and validation").
>
> Is it really the right place for userspace devs to learn how to use KMS?

There's more to drm than kms, but yeah I think currently that's the
best starting point we have for documenting the uapi. We might also
need to separate some of the more kernel-internal bits into other
chapters, e.g. ioctl and master stuff is currently there because those
are fairly important concept from a drm uapi pov. But maybe we should
pull out the implementation details into some other place.

Given that 0 of our ioctls and ioctl structures are currently
documented, I'm not really worried about those issues just yet :-)
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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