From ef60f6db0d62137dc0adf924f66e5aea72ef938c Mon Sep 17 00:00:00 2001
From: Iago Toral Quiroga <itoral@igalia.com>
Date: Wed, 29 Sep 2021 09:07:28 +0200
Subject: [PATCH] v3dv: handle RTs with no color targets in v71
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Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25450>
---
 src/broadcom/vulkan/v3dvx_cmd_buffer.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/broadcom/vulkan/v3dvx_cmd_buffer.c b/src/broadcom/vulkan/v3dvx_cmd_buffer.c
index 5484d75..504cd2f 100644
--- a/src/broadcom/vulkan/v3dvx_cmd_buffer.c
+++ b/src/broadcom/vulkan/v3dvx_cmd_buffer.c
@@ -1175,6 +1175,17 @@ v3dX(cmd_buffer_emit_render_pass_rcl)(struct v3dv_cmd_buffer *cmd_buffer)
 #endif
    }
 
+#if V3D_VERSION >= 71
+   /* If we don't have any color RTs, we still need to emit one and flag
+    * it as not used using stride = 1.
+    */
+   if (subpass->color_count == 0) {
+      cl_emit(rcl, TILE_RENDERING_MODE_CFG_RENDER_TARGET_PART1, rt) {
+         rt.stride = 1;
+      }
+   }
+#endif
+
 #if V3D_VERSION == 42
    cl_emit(rcl, TILE_RENDERING_MODE_CFG_COLOR, rt) {
       cmd_buffer_render_pass_setup_render_target
-- 
2.7.4