[Openpvrsgx-devgroup] [openpvrsgx-devgroup/linux_openpvrsgx] Atom/GMA3600-SGX545 questions (Issue #8)

[H. Nikolaus Schaller]

Hi Julius,
great stuff you have found!

> Am 11.05.2024 um 11:12 schrieb Julius Schwartzenberg <notifications at github.com>:
> 
> 
> I'm also looking around what's available for the PowerVR devices with regards to driver binaries to see if GMA3600 netbooks could be supported. The binaries from the vendor seem to have the following attributes:
>     • They contain numbers libraries, notably there is always a library like libpvr2d.so.1.7.862890. The version suffix relates to the DDK version and is the same for all included binaries.

This version seems to match the kernel driver tree we have.
> 
> 
>     • There are a bunch of libpvrPVR2D_*WSEGL.so.1.7.862890 libraries. Those provide support for different window systems.
>     • Configuration is done through powervr.ini which is typically in /etc/. It is possible to specify the WindowSystem there and supposedly EGL would use another windowing system.

Yes, this seems to be sort of a standard...
> 
> 
>     • Filenames of the included files generally contain PVR2D somewhere in the name.
> For x86 there are only a few sets of binaries available.
> The main ones are from the Cedarview driver releases from Intel. Those are based on DDK version 1.7.862890 and provide X.org support. (Hacking X.org itself a bit allows me to run with slightly higher versions without running into a crash immediately.) These are meant for PowerVR SGX545 as common on netbooks and mainboards.
> Older binaries seem to be provided in an EMGD package. These seem to be for SGX535 devices, but I also see references to SGX545. These seem to be based on DDK 1.5.15.3226. The file names contain EMGD instead of PVR2D. There are also window system binaries for Wayland in addition to X.org.
For this DDK we also have some driver code.
> Other x86 binaries are provided for Android tablets based on PowerVR SGX544 and PowerVR series 6 chips. Notably Asus Zenphone 5. These are based on DDK 1.12.2701748 and only have a binary for the Android window system. The EGL libraries in a subdirectory explicitly have POWERVR-SGX544 in their filename. Maybe they are somehow tied to that model.
> There are also binaries for the ASUS MeMO Pad 7. These are based on DDK 1.12.3197934 and are otherwise similar.
> There is also a Dell Venue 8 tablet. The binaries on it do not have a DDK version suffix and the EGL libraries have POWERVR_ROGUE in their name.
Rougue is not PVR SGX (PVR 5) but PVR 6.
> Their seems to be an Android DDK for the SGX540/544 available here: https://github.com/shaqfu786/GFX_Linux_DDK

This seems to be a DDK 1.8.869593 compatible driver: https://github.com/shaqfu786/GFX_Linux_DDK/blob/master/eurasia_km/include4/pvrversion.h#L39C38-L39C44
which we do not yet have in our collection: https://github.com/openpvrsgx-devgroup/linux_openpvrsgx/branches/all?query=letux%2Fpvrsrvkm

I plan to add this for a future release.

BR and thanks,
Nikolaus

PS: maybe you can subscribe to https://lists.goldelico.com/mailman/listinfo.cgi/openpvrsgx-devgroup which is a mailing list with different audience.