[Openpvrsgx-devgroup] Status & HW to bring

Tony Lindgren tony at atomide.com
Sun Nov 10 19:15:32 CET 2019

* H. Nikolaus Schaller <hns at goldelico.com> [191109 17:10]:
> Hi,
> > Am 09.11.2019 um 17:42 schrieb Tony Lindgren <tony at atomide.com>:
> > 
> > Hi,
> > 
> > * H. Nikolaus Schaller <hns at goldelico.com> [191109 13:17]:
> >> 5. reshape the driver to be able to submit it into drivers/staging/pvr mainline
> > 
> > According to Sebastian this is unlikely to happen though, so
> > adding Sebastian to Cc.
> Fine!
> > 
> > See also the docs for "DRM Open-Source Userspace Requirements":
> > 
> > https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html
> > 
> > AFAIK the pvr-drv driver needs to go directly to drivers/gpu/drm/pvr
> > instead.
> Well, moving the code around is not a big deal :)
> "staging" is more a placeholder to get it into mainline in any shape that
> is acceptable so that we get more visibility and can use the kernel.org
> infrastructure which will be critical for project growth.

Yeah sure I have no issues with that naturally :) I just wanted
to point the drm vs staging issue out so it does not come as a
surprise later on.

> > Sebastian, care to clarify what you have picked up on this
> > recently?
> > 
> > Basically what I understand is that at this point we just need
> > to make the current drivers/staging/pvr/pvr-drv.[ch] and related
> > rewritten components into a standalone 2d accelerated driver for
> > drivers/gpu/drm/pvr :)
> I am open to anything, as long as it works :)
> BTW: I am preparing to separate our work into even more patch sets
> (feature branches) but which should have a better logical structure:
> letux/omap-sysc-prm-gfx		- all lowest level gear almost arrived in linux-next
> letux/omap-pvr-soc-glue		- bindings and DTS additions for gpu in SOC
> letux/staging-pvr		- this is where Kconfig, umbrella Makefile and your new pvr-drv resides
> 				  and where clean code should appear
> letux/pvrsrvkm-1.9		- old omap3+4 DDK (most likely not DRM)
> letux/pvrsrvkm-1.10		- some DDK which was said to support omap4+omap5 (most likely not DRM)
> letux/pvrsrvkm-1.14		- DDK we are working on - for am335x and dra7 (user-space can be patched to omap5)
> letux/pvrsrvkm-1.17		- DDK version may support am3352, am4376, dra7, am654 
> letux/pvr-demo			- user-space scripts for debugging and gpu-demo
> All this can be merged together with linus/master (well, all branches are rebased on it)
> to give the complete letux-pvr branch.
> The first two patch sets will become empty over time and can be omitted as soon as
> all these things are upstream.
> There is room for adding more patch sets, e.g. the Ingenic DDK1.14 variant or the
> TI 1.15 I have found. And I have recently seen some Poulsbo project variant on github.
> The idea behind is to pile up everything we can find first, but in a strict format. So
> that we have it in one place for studying and doing comparisons. And then we can merge
> and shrink and rework to a single driver in letux/staging-pvr (or however it will be called).

Yup makes sense to me.



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