From bc7afbf23dc6b1228ff0ef0164369e8d904f16ff Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Tue, 28 Nov 2023 20:05:30 -0400
Subject: [PATCH] agx: allocate varying slot if writing viewport only

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26614>
---
 src/asahi/compiler/agx_compile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/asahi/compiler/agx_compile.c b/src/asahi/compiler/agx_compile.c
index b3a073cb83d..e7650c7403b 100644
--- a/src/asahi/compiler/agx_compile.c
+++ b/src/asahi/compiler/agx_compile.c
@@ -2549,7 +2549,7 @@ agx_remap_varyings_vs(nir_shader *nir, struct agx_varyings_vs *varyings,
       base += 1;
    }
 
-   if (nir->info.outputs_written & VARYING_BIT_LAYER) {
+   if (nir->info.outputs_written & (VARYING_BIT_LAYER | VARYING_BIT_VIEWPORT)) {
       varyings->layer_viewport_slot = base;
       base += 1;
    }