[PATCH] drm/xe/tuning: Apply "Disable NULL query for Anyhit Shader" to Xe2

[Lucas De Marchi]

On Tue, Aug 19, 2025 at 11:41:51AM +0530, Nitin Gote wrote:
>Extend the "Disable NULL query for Anyhit Shader" tuning to Xe2
>(graphics version 2000+) platforms, in addition to Xe3.
>
>This sets the DIS_NULL_QUERY bit in RT_CTRL to disable null query
>for Anyhit shaders on both Xe2 and Xe3.

This needs a few more details to help anyone using this commit. I can
add this paragraph while applying:

	This is a change in behavior that can regress a userspace not
	prepared for it. However it's not feasible to change dynamically
	the option per client or per exec queue via an opt-in flag. Mesa
	is already prepared for that and it got propagated to their
	stable versions. Even if it was possible, at this point adding a
	flag would mean mesa would also need to propagate such a flag to
	their stable versions, otherwise the previous fix would not be
	used.

	Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35044

Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>

thanks
Lucas De Marchi


>
>Signed-off-by: Nitin Gote <nitin.r.gote at intel.com>
>---
> drivers/gpu/drm/xe/xe_tuning.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/xe/xe_tuning.c b/drivers/gpu/drm/xe/xe_tuning.c
>index 828b45b24c23..a524170a04d0 100644
>--- a/drivers/gpu/drm/xe/xe_tuning.c
>+++ b/drivers/gpu/drm/xe/xe_tuning.c
>@@ -99,7 +99,7 @@ static const struct xe_rtp_entry_sr engine_tunings[] = {
> 	  XE_RTP_ACTIONS(SET(SAMPLER_MODE, INDIRECT_STATE_BASE_ADDR_OVERRIDE))
> 	},
> 	{ XE_RTP_NAME("Tuning: Disable NULL query for Anyhit Shader"),
>-	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(3000, XE_RTP_END_VERSION_UNDEFINED),
>+	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2000, XE_RTP_END_VERSION_UNDEFINED),
> 		       FUNC(xe_rtp_match_first_render_or_compute)),
> 	  XE_RTP_ACTIONS(SET(RT_CTRL, DIS_NULL_QUERY))
> 	},
>-- 
>2.25.1
>