commit 6079f7c3c3ce30277ce671b9679186f243a5e570
author Eric Anholt <eric@anholt.net> Thu Nov 02 18:45:07 2017 -0700
committer Eric Anholt <eric@anholt.net> Tue Nov 07 09:40:25 2017 -0800
tree d7a0c092f26ad6ed719f6623b05457696b3bb822
parent eeb9e80272cb0dd795c4197962f2af3398747dda

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

Fixes piglit early-z.

src/gallium/drivers/vc5/vc5_emit.c

diff --git a/src/gallium/drivers/vc5/vc5_emit.c b/src/gallium/drivers/vc5/vc5_emit.c
index c0b5d54..094d548 100644
--- a/src/gallium/drivers/vc5/vc5_emit.c
+++ b/src/gallium/drivers/vc5/vc5_emit.c
@@ -287,7 +287,8 @@
                                 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 {