Re: Avoiding llvm from ports on rpi4

On Feb 22, 2025, at 11:08, Nuno Teixeira <[email protected]> wrote:

> Good point! I forgot to check options on port that are suitable for an rpi4!
> I was straight to hacking stuff :)
> 
> As I don't know if any graphics acceleration is working on rpi4, I'm building with:
> 
> _OPTIONS_READ=mesa-dri-24.1.7_4
> _FILE_COMPLETE_OPTIONS_LIST=ZSTD panfrost r300 r600 radeonsi swrast zink X11 WAYLAND radv swrast_vk
> OPTIONS_FILE_SET+=ZSTD
> OPTIONS_FILE_UNSET+=panfrost
> OPTIONS_FILE_UNSET+=r300
> OPTIONS_FILE_UNSET+=r600
> OPTIONS_FILE_UNSET+=radeonsi
> OPTIONS_FILE_UNSET+=swrast
> OPTIONS_FILE_UNSET+=zink
> OPTIONS_FILE_SET+=X11
> OPTIONS_FILE_SET+=WAYLAND
> OPTIONS_FILE_UNSET+=radv
> OPTIONS_FILE_UNSET+=swrast_vk
> 
> While I'm really don't sure is panfrost os working or not...

Warning that I'm not literate in the subject area overall.

You have panfrost UNSET . You only have ZSTD, X11, and
WAYLAND SET.

It does not look to me like any of the lowercase names
apply to the RPi4's VideoCore VI hardware from Broadcom.
If true, then the UNSET's would seem to be right for
what is listed above. (Unsure for swrast and swrast_vk
which seem to be software-rasterization instead of
hardward tied. Also, zink is "OpenGL on top of Khronos’
Vulkan API" instead of being hardware.)

https://docs.mesa3d.org/drivers/panfrost.html does not
indicate VideoCore VI hardware from Broadcom as a
"Model". So I expect that it does not apply to a
VideoCore VI context.

> I will see if I get working graphics this way and check if llvm dep is gone.

So you are only intending to build: ZSTD, X11, WAYLAND ?
(But I do not see how that gets into potential acceleration
specific to the RPi4 VideoCore VI hardware from Broadcom.
So I'm confused relative to the wording.)

It does seem that the hardware names I recognize are UNSET
and do not seem likely to be involved with VideoCore VI
hardware. I'm assuming the video context is the native RPi4
context, and not any somehow added alternative video
hardware.

swrast and swrast_vk and zink : I've no clue if they might
be of use, as they do not seem to be hardware tied.

May be I should have also asked: what all needs mesa-dri to
be built and available for what you are trying to do? That
might provide more context about what is needed.

===
Mark Millard
marklmi at yahoo.com