diff --git a/src/asahi/lib/cmdbuf.xml b/src/asahi/lib/cmdbuf.xml
index 398e06c2221..2fa144a30d5 100644
--- a/src/asahi/lib/cmdbuf.xml
+++ b/src/asahi/lib/cmdbuf.xml
@@ -369,7 +369,9 @@
 
   <struct name="Linkage" size="16">
     <field name="Tag" size="32" start="0:0" type="hex" default="0xC020000"/>
-    <field name="Unk 1" size="32" start="1:0" type="hex" default="0x100"/>
+    <field name="Any varyings" size="1" start="1:16" type="bool"/>
+    <field name="Has point size" size="1" start="1:18" type="bool"/>
+    <field name="Has frag coord Z" size="1" start="1:21" type="bool"/>
     <field name="Unk 2" size="32" start="2:0" type="hex" default="0x0"/>
     <field name="Varying count" size="32" start="3:0" type="uint"/>
   </struct>
diff --git a/src/gallium/drivers/asahi/agx_state.c b/src/gallium/drivers/asahi/agx_state.c
index f156e087543..f3e38669587 100644
--- a/src/gallium/drivers/asahi/agx_state.c
+++ b/src/gallium/drivers/asahi/agx_state.c
@@ -1393,9 +1393,9 @@ demo_linkage(struct agx_compiled_shader *vs, struct agx_pool *pool)
 
    agx_pack(t.cpu, LINKAGE, cfg) {
       cfg.varying_count = vs->info.varyings.nr_slots;
-
-      // 0x2 for fragcoordz, 0x1 for varyings at all
-      cfg.unk_1 = 0x210000 | (vs->info.writes_psiz ? 0x40000 : 0);
+      cfg.any_varyings = !!cfg.varying_count;
+      cfg.has_point_size = vs->info.writes_psiz;
+      cfg.has_frag_coord_z = 1;
    };
 
    return t.gpu;