git: drm - Update to Linux 4.20.17

[Michael Neumann]

On Thu, Jun 12, 2025 at 09:34:19AM +0500, Sergey Zigachev wrote:
> > FYI, I had to remove i915_load=YES from rc.conf in order to make it
> > work! I use Xorg from ravenports.
> > 
> > With the old kernel I had to use modesetting.
> 
> What issues do you have with i915_load? Did you test hardware acceleration?

Sorry for my late response. With Driver "intel" and i915_load=YES in
rc.conf, I get a segfault when starting Xorg (I use Xorg from
ravenports):

	     70.937] (EE) Segmentation fault at address 0x0
	[    70.937] (EE)
	Fatal server error:
	[    70.938] (EE) Caught signal 11 (Segmentation fault). Server aborting
	[    70.938] (EE)
	[    70.938] (EE)
	Please consult the The X.Org Foundation support
		 at http://wiki.x.org
	 for help.
	[    70.938] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
	[    70.938] (EE)
	[    70.942] (EE) Server terminated with error (1). Closing log file.

Driver "intel" works when I leave out i915_load.
Driver "modesetting" works regardless of i915_load.

> 
> Also, you might want to patch xorg-server and/or xf86-video-intel.
> 
> xorg-server: https://github.com/DragonFlyBSD/DeltaPorts/pull/1503
> With this patch you can test modesetting driver with glamor hardware
> acceleration.
> 
> xf86-video-intel: https://github.com/DragonFlyBSD/DeltaPorts/pull/1502
> This patch should improve performance with SNA hardware acceleration.

I am using Xorg-server from Ravenports. I think the ports there lack
these patches.

How can I test if hardware acceleration is turned on? And will the  
"intel" driver be more performant than "modesetting"? How can I test
this?

Regards,

  Michael