commit 35433494f35f049aa0ba993391871504abfa0cc0
author Ilia Mirkin <imirkin@alum.mit.edu> Sat Nov 04 13:49:04 2017 -0400
committer Ilia Mirkin <imirkin@alum.mit.edu> Wed Nov 08 22:32:43 2017 -0500
tree 7983132eb004912da7bcec93208f3b283123a6e3
parent 9c53b80ff94c60bef18af6fbeee30bae43b42485

nv50: make blending work so that zero wins in a multiplication

This matches nvc0 behavior, tested with the fbo-float-nan piglit.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Tobias Klausmann<tobias.johannes.klausmann@mni.thm.de>

src/gallium/drivers/nouveau/nv50/nv50_screen.c

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index 90c19b7..c2e69f5 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -772,6 +772,11 @@
       PUSH_DATA (push, 0);
    }
 
+   BEGIN_NV04(push, NV50_3D(UNK0FDC), 1);
+   PUSH_DATA (push, 1);
+   BEGIN_NV04(push, NV50_3D(UNK19C0), 1);
+   PUSH_DATA (push, 1);
+
    PUSH_KICK (push);
 }