From c18b1c6df5108112445c34b30680d8818202a4cb Mon Sep 17 00:00:00 2001
From: Gert Wollny <gert.wollny@collabora.com>
Date: Sat, 18 Jul 2020 21:33:54 +0200
Subject: [PATCH] r600/sfn: Add a forced output swizzle for depth write

This makes sure no components are written that shouldn't be written.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5963>
---
 src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp b/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
index 850092e..978d962 100644
--- a/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_shader_fragment.cpp
@@ -701,6 +701,10 @@ bool FragmentShaderFromNir::emit_export_pixel(const nir_variable *out_var, nir_i
    std::array<uint32_t,4> swizzle;
    unsigned writemask = nir_intrinsic_write_mask(instr);
    switch (out_var->data.location) {
+   case FRAG_RESULT_DEPTH:
+      writemask = 1;
+      swizzle = {0,7,7,7};
+      break;
    case FRAG_RESULT_STENCIL:
       writemask = 2;
       swizzle = {7,0,7,7};
-- 
2.7.4