diff --git a/src/asahi/lib/cmdbuf.xml b/src/asahi/lib/cmdbuf.xml
index 1791f074052..e3fcfd1773f 100644
--- a/src/asahi/lib/cmdbuf.xml
+++ b/src/asahi/lib/cmdbuf.xml
@@ -507,10 +507,17 @@
     <field name="Buffer" size="36" start="0:27" type="address" modifier="shr(3)"/>
   </struct>
 
+  <enum name="Shared layout">
+    <value name="Vertex/compute" value="0x24"/>
+    <value name="32x32" value="0x2f"/>
+    <value name="32x16" value="0x3f"/>
+    <value name="16x16" value="0x36"/>
+  </enum>
+
   <struct name="USC Shared" size="4">
     <field name="Tag" size="8" start="0" type="USC Control" default="Shared"/>
     <field name="Uses shared memory" size="1" start="8" type="bool"/>
-    <field name="Unk 1" size="12" start="8" type="hex" default="0x48"/>
+    <field name="Shared layout" size="6" start="10" type="Shared layout"/>
     <field name="Pixel stride in 8 bytes" size="4" start="20" type="uint"/>
     <field name="Shared memory per threadgroup in 256 bytes" size="8" start="24" type="uint"/>
   </struct>
diff --git a/src/gallium/drivers/asahi/agx_state.c b/src/gallium/drivers/asahi/agx_state.c
index 790098f9f91..61a94dcb042 100644
--- a/src/gallium/drivers/asahi/agx_state.c
+++ b/src/gallium/drivers/asahi/agx_state.c
@@ -1321,11 +1321,11 @@ agx_build_pipeline(struct agx_context *ctx, struct agx_compiled_shader *cs, enum
    agx_usc_pack(&b, SHARED, cfg) {
       if (stage == PIPE_SHADER_FRAGMENT) {
          cfg.uses_shared_memory = true;
-         cfg.unk_1 = 0xbc;
+         cfg.shared_layout = AGX_SHARED_LAYOUT_32X32;
          cfg.pixel_stride_in_8_bytes = 1;
          cfg.shared_memory_per_threadgroup_in_256_bytes = 32;
       } else {
-         cfg.unk_1 = 0x90;
+         cfg.shared_layout = AGX_SHARED_LAYOUT_VERTEX_COMPUTE;
       }
    }
 
@@ -1369,7 +1369,7 @@ agx_build_clear_pipeline(struct agx_context *ctx, uint32_t code, uint64_t clear_
 
    agx_usc_pack(&b, SHARED, cfg) {
       cfg.uses_shared_memory = true;
-      cfg.unk_1 = 0xbc;
+      cfg.shared_layout = AGX_SHARED_LAYOUT_32X32;
       cfg.pixel_stride_in_8_bytes = 1;
       cfg.shared_memory_per_threadgroup_in_256_bytes = 32;
    }
@@ -1450,7 +1450,7 @@ agx_build_reload_pipeline(struct agx_context *ctx, uint32_t code, struct pipe_su
 
    agx_usc_pack(&b, SHARED, cfg) {
       cfg.uses_shared_memory = true;
-      cfg.unk_1 = 0xbc;
+      cfg.shared_layout = AGX_SHARED_LAYOUT_32X32;
       cfg.pixel_stride_in_8_bytes = 1;
       cfg.shared_memory_per_threadgroup_in_256_bytes = 32;
    }
@@ -1489,7 +1489,7 @@ agx_build_store_pipeline(struct agx_context *ctx, uint32_t code,
 
    agx_usc_pack(&b, SHARED, cfg) {
       cfg.uses_shared_memory = true;
-      cfg.unk_1 = 0xbc;
+      cfg.shared_layout = AGX_SHARED_LAYOUT_32X32;
       cfg.pixel_stride_in_8_bytes = 1;
       cfg.shared_memory_per_threadgroup_in_256_bytes = 32;
    }