Hi Nicolas
Am 12.02.25 um 19:58 schrieb Nicolas Baranger:
Dear maintener
That's mostly me and Jocelyn.
I did include ast-drm driver version 1.15.1 (in replacement of version
0.1.0) on the new mainline kernel too (6.14.0-rc2) and I issue a new
dkms patch
Last DKMS patch had been sucessfully tested on mainline.
And last ast.ko version 1.15.1 included in linux tree had also been
sucessfully tested
Online directory is updated with :
- new DKMS patch
- new DKMS srouces
- new DKMS debian package
- new tarball of mainline included ast_new ported in kernel tree
- new kernel debian package (mainline with ast_new)
NB: online directory is here:
https://xba.soartist.net/ast-drm_nba_20250211/
Please let me know what I should do to see this change in linux-next
I'm having a little trouble with figuring out which of the many driver
sources is the relevant one. Am I correct to assume it's the one at
https://xba.soartist.net/ast-drm_nba_20250211/nba-dkms/nba_last_src_20250212/src/
About that driver: Although the official driver reports an ancient
version number, it is an up-to-date driver. It is actually more
up-to-date than Aspeed's package. Both drivers share source code and a
few years ago there was an effort to bring the kernel's driver up to the
same feature set. Since then, the kernel's driver has been updated,
reworked and improved.
About the performance: From what I can tell, the only significant
difference in these drivers is memory management. Your ast_new driver
uses an older algorithm that we replaced quite a few releases ago. The
old version was unreliable on systems with little video memory, so we
had to replace it. I don't know why the new code should be slower though.
If I give you a patch against a recent Linux kernel, are you capable of
building the patched kernel and testing that change on your system?
Best regards
Thomas
Thanks for help
Kind regards
Nicolas Baranger
Le 2025-02-11 19:15, Nicolas Baranger a écrit :
Dear maintener
For my own usage, I did make work the ASPEED ast-drm 1.15.1 video
driver on mainline kernel (6.13.0 + 6.13.1).
ASPEED video driver is availiable here:
https://www.aspeedtech.com/file/support/Linux_DRM_1.15.1_4.tar.gz
But it only work for LTS kernel
So I modify the DKMS package and I build a new Debian DKMS package
with the adapted source.
My patch can be find here :
https://xba.soartist.net/ast-drm_nba_20250211/nba-dkms/astdiff.patch
See the README:
https://xba.soartist.net/ast-drm_nba_20250211/nba-dkms/README
Using this new 'ast 1.15.1' driver, performance are amazing compared
to the 'ast' driver include in kernel tree, specially when using a
discrete GPU and offloading VULKAN / 3D on it but using AST VGA card
as the main video card and as the main and only video output (the
discrete GPU is used only for offloading 3D or for cuda/opencl)
So to make things easier, I include the new 'ast 1.15.1' driver in
kernel tree as AST_NEW : linux-6.13.1-ast/drivers/gpu/drm/ast_new'
It's working fine as you can see on this video :
https://xba.soartist.net/ast-drm_nba_20250211/vulcan_nvidia_prime_render_offload_on_ast_vga_card.webm
I upload all the work I've done here :
https://xba.soartist.net/ast-drm_nba_20250211/
See the global README :
https://xba.soartist.net/ast-drm_nba_20250211/README
and the README in nba-kernel sub-directory :
https://xba.soartist.net/ast-drm_nba_20250211/nba-kernel/README
I'm not a developer so please let me know if I made the things the
right way and if this new 'ast 1.15.1' driver can be ported to
linux-next or linux-? ?
If you need more explanations, do not hesitate to contact me, I would
be happy to help
Kind regards
Nicolas Baranger
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
