From f69c3849b8c397f48a8d6f22d1991ae927a31657 Mon Sep 17 00:00:00 2001
From: Connor Abbott <cwabbott0@gmail.com>
Date: Fri, 3 Jul 2020 12:03:00 +0200
Subject: [PATCH] tu: Force gl_Layer to 0 when necessary

In particular this will help us implement input attachments correctly
with layered rendering.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5732>
---
 src/freedreno/vulkan/tu_pipeline.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/freedreno/vulkan/tu_pipeline.c b/src/freedreno/vulkan/tu_pipeline.c
index 965aa34209f..4a21a1514ee 100644
--- a/src/freedreno/vulkan/tu_pipeline.c
+++ b/src/freedreno/vulkan/tu_pipeline.c
@@ -1977,6 +1977,10 @@ tu_pipeline_builder_compile_shaders(struct tu_pipeline_builder *builder,
       builder->shaders[stage] = shader;
    }
 
+   struct tu_shader *gs = builder->shaders[MESA_SHADER_GEOMETRY];
+   key.layer_zero =
+      !gs || !(gs->ir3_shader->nir->info.outputs_written & VARYING_SLOT_LAYER);
+
    pipeline->tess.patch_type = key.tessellation;
 
    for (gl_shader_stage stage = MESA_SHADER_VERTEX;
-- 
2.30.2