From d208212f80effe4e2831fa408e976099317230b0 Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Tue, 4 Feb 2020 09:34:11 -0500
Subject: [PATCH] pan/midgard: Use dummy tag for empty shaders

Fixes INSTR_INVALID_ENC in dEQP-GLES31.functional.compute.basic.empty

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3835>
---
 src/gallium/drivers/panfrost/pan_assemble.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/panfrost/pan_assemble.c b/src/gallium/drivers/panfrost/pan_assemble.c
index 31156c48fd5..d6b63219c3a 100644
--- a/src/gallium/drivers/panfrost/pan_assemble.c
+++ b/src/gallium/drivers/panfrost/pan_assemble.c
@@ -83,8 +83,8 @@ panfrost_shader_compile(
                 memcpy(state->bo->cpu, dst, size);
                 meta->shader = state->bo->gpu | program.first_tag;
         } else {
-                /* no shader */
-                meta->shader = 0x0;
+                /* No shader. Use dummy tag to avoid INSTR_INVALID_ENC */
+                meta->shader = 0x0 | 1;
         }
 
         util_dynarray_fini(&program.compiled);
-- 
2.30.2