drm/nouveau/fifo/nvc0: bash some magic reg to make uevent interrupt work

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

diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
index bf86f40..4f226af 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
@@ -706,6 +706,7 @@ nvc0_fifo_init(struct nouveau_object *object)
        nv_wr32(priv, 0x002a00, 0xffffffff); /* clears PFIFO.INTR bit 30 */
        nv_wr32(priv, 0x002100, 0xffffffff);
        nv_wr32(priv, 0x002140, 0x3fffffff);
+       nv_wr32(priv, 0x002628, 0x00000001); /* makes mthd 0x20 work */
        return 0;
 }