[Nouveau] [PATCH] drm/nvc0/gr: fix TP init for transform feedback offset queries

[Christoph Bumiller]

Without this, they return bytes written since the last update of
the offset, but we want the full offset.

Trace shows setting this on GPC[0]/TP[0] is enough.
---
 drivers/gpu/drm/nouveau/nvc0_graph.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvc0_graph.c b/drivers/gpu/drm/nouveau/nvc0_graph.c
index d99b285..f6bc4a8 100644
--- a/drivers/gpu/drm/nouveau/nvc0_graph.c
+++ b/drivers/gpu/drm/nouveau/nvc0_graph.c
@@ -357,6 +357,8 @@ nvc0_graph_init_gpc_0(struct drm_device *dev)
 	u8  tpnr[GPC_MAX];
 	int i, gpc, tpc;
 
+	nv_wr32(dev, TP_UNIT(0, 0, 0x5c), 1); /* affects TFB offset queries */
+
 	/*
 	 *      TP      ROP UNKVAL(magic_not_rop_nr)
 	 * 450: 4/0/0/0 2        3
-- 
1.7.3.4