[Nouveau] [PATCH 2/5] ibus/gk20a: increase SM wait timeout

[Alexandre Courbot]

Increase clock timeout for SYS, FPB and GPC in order to avoid operation
failure at high gpcclk rate.

Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
 drm/nouveau/nvkm/subdev/ibus/gk20a.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/ibus/gk20a.c b/drm/nouveau/nvkm/subdev/ibus/gk20a.c
index c0fdb89e74ac..24dcdfb58a8d 100644
--- a/drm/nouveau/nvkm/subdev/ibus/gk20a.c
+++ b/drm/nouveau/nvkm/subdev/ibus/gk20a.c
@@ -38,6 +38,14 @@ gk20a_ibus_init_priv_ring(struct gk20a_ibus_priv *priv)
 	nv_wr32(priv, 0x12004c, 0x4);
 	nv_wr32(priv, 0x122204, 0x2);
 	nv_rd32(priv, 0x122204);
+
+	/*
+	 * Bug: increase clock timeout to avoid operation failure at high
+	 * gpcclk rate.
+	 */
+	nv_wr32(priv, 0x122354, 0x800);
+	nv_wr32(priv, 0x128328, 0x800);
+	nv_wr32(priv, 0x124320, 0x800);
 }
 
 static void
-- 
2.4.2