nouveau: always enable at least one RC

Experimentally, this is required for glxgears and others to display the
proper colors. This is also what the code used to do before the
referenced commit.

Fixes: c703658b396 (mesa: Drop _EnabledUnits.)
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org

diff --git a/src/mesa/drivers/dri/nouveau/nv20_state_frag.c b/src/mesa/drivers/dri/nouveau/nv20_state_frag.c
index 492ecdc42fa33893393732afc75513714a4552b3..2c5c2dbe89e9353b376bd7140667a9e003c5191f 100644 (file)
--- a/src/mesa/drivers/dri/nouveau/nv20_state_frag.c
+++ b/src/mesa/drivers/dri/nouveau/nv20_state_frag.c
@@ -67,5 +67,5 @@ nv20_emit_frag(struct gl_context *ctx, int emit)
        PUSH_DATA (push, in >> 32);
 
        BEGIN_NV04(push, NV20_3D(RC_ENABLE), 1);
-       PUSH_DATA (push, n);
+       PUSH_DATA (push, MAX2(1, n));
 }