drm/nouveau/ibus/gk20a: increase SM wait timeout

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

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/ibus/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/ibus/gk20a.c
index c0fdb89e74ac4a41944e2d7c2f41ca3daa6c4ed6..24dcdfb58a8d852039317a5017ee34dcc9cf3039 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/ibus/gk20a.c
+++ b/drivers/gpu/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