nv50: magic fix for "3d busted without the binary driver first" issue

No idea what this reg does.. NVIDIA put 0x802 into it on some chips, the
criteria aren't too clear on when they do that however.  Hopefully 0x800
will work everywhere...

diff --git a/shared-core/nv50_graph.c b/shared-core/nv50_graph.c
index cbf6fd628a181c19630f96817df17d087a5c1413..43f35e06082c904a75dd7cdee9998e3e0b368cb7 100644 (file)
--- a/shared-core/nv50_graph.c
+++ b/shared-core/nv50_graph.c
@@ -82,6 +82,7 @@ nv50_graph_init_regs(struct drm_device *dev)
        DRM_DEBUG("\n");
 
        NV_WRITE(NV04_PGRAPH_DEBUG_3, (1<<2) /* HW_CONTEXT_SWITCH_ENABLED */);
+       NV_WRITE(0x402ca8, 0x800);
 }
 
 static int