From: Eric Anholt <eric@anholt.net>
Date: Fri, 3 Nov 2017 01:45:07 +0000 (-0700)
Subject: broadcom/vc5: Disable early Z test when the FS writes Z.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6079f7c3c3ce30277ce671b9679186f243a5e570;p=mesa.git

broadcom/vc5: Disable early Z test when the FS writes Z.

Fixes piglit early-z.
---

diff --git a/src/gallium/drivers/vc5/vc5_emit.c b/src/gallium/drivers/vc5/vc5_emit.c
index c0b5d541978..094d5482954 100644
--- a/src/gallium/drivers/vc5/vc5_emit.c
+++ b/src/gallium/drivers/vc5/vc5_emit.c
@@ -287,7 +287,8 @@ vc5_emit_state(struct pipe_context *pctx)
                                 config.z_updates_enable =
                                         vc5->zsa->base.depth.writemask;
                                 config.early_z_enable =
-                                        vc5->zsa->early_z_enable;
+                                        (vc5->zsa->early_z_enable &&
+                                         !vc5->prog.fs->prog_data.fs->writes_z);
                                 config.depth_test_function =
                                         vc5->zsa->base.depth.func;
                         } else {