From 2dff6a541e03282beeba04753212bf5c6077af0c Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Mon, 7 Oct 2024 12:43:50 -0400
Subject: [PATCH] asahi: be explicit about usc reg unk

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31908>
---
 src/asahi/genxml/cmdbuf.xml | 2 +-
 src/asahi/lib/agx_linker.c  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/asahi/genxml/cmdbuf.xml b/src/asahi/genxml/cmdbuf.xml
index 78695b70f12..aa3d35cbaab 100644
--- a/src/asahi/genxml/cmdbuf.xml
+++ b/src/asahi/genxml/cmdbuf.xml
@@ -693,7 +693,7 @@
     <field name="Register count" size="5" start="8" type="uint" modifier="groups(8)"/>
     <field name="Unk 1" size="1" start="13" type="bool"/>
     <field name="Spill size" size="4" start="18" type="hex"/>
-    <field name="Unk 4" size="8" start="24" type="hex" default="0x1"/>
+    <field name="Unk 4" size="8" start="24" type="hex"/>
   </struct>
 
   <struct name="USC No Preshader" size="2">
diff --git a/src/asahi/lib/agx_linker.c b/src/asahi/lib/agx_linker.c
index 2c020cba80e..e6ccb579823 100644
--- a/src/asahi/lib/agx_linker.c
+++ b/src/asahi/lib/agx_linker.c
@@ -193,6 +193,7 @@ agx_fast_link(struct agx_linked_shader *linked, struct agx_device *dev,
       cfg.register_count = nr_gprs;
       cfg.unk_1 = fragment;
       cfg.spill_size = scratch_size ? agx_scratch_get_bucket(scratch_size) : 0;
+      cfg.unk_4 = 1;
    }
 
    if (fragment) {