From 773ee60e48e2cbcb245207f74461e2c1145fef11 Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Wed, 20 Aug 2025 12:29:50 +0200
Subject: [PATCH] nir/uub: decrease default max subgroup size to 128

128 is the maximum all apis allow.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36874>
---
 src/compiler/nir/nir_range_analysis.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_range_analysis.c b/src/compiler/nir/nir_range_analysis.c
index a215ea0f952..655174a5013 100644
--- a/src/compiler/nir/nir_range_analysis.c
+++ b/src/compiler/nir/nir_range_analysis.c
@@ -1573,7 +1573,7 @@ lookup_input(nir_shader *shader, unsigned driver_location)
 /* The config here should be generic enough to be correct on any HW. */
 static const nir_unsigned_upper_bound_config default_ub_config = {
    .min_subgroup_size = 1u,
-   .max_subgroup_size = UINT16_MAX,
+   .max_subgroup_size = 128u,
    .max_workgroup_invocations = UINT16_MAX,
 
    /* max_workgroup_count represents the maximum compute shader / kernel