drm/nvc0/gr: fix TP init for transform feedback offset queries

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.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvc0_graph.c b/drivers/gpu/drm/nouveau/nvc0_graph.c
index a74e501afd25b44b7315d497f8ca30908dcb3995..ecfafd70cf0ed2b6f9ee0b51c74031caa337de27 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvc0_graph.c
+++ b/drivers/gpu/drm/nouveau/nvc0_graph.c
@@ -381,6 +381,8 @@ 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