drm/nouveau/disp/dp: create subclass for dp outputs

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
index 7bf54e8..e5f5e42 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
@@ -1357,6 +1357,12 @@
 }
 
 struct nouveau_oclass *
+nvd0_disp_outp_sclass[] = {
+	&nvd0_sor_dp_impl.base.base,
+	NULL
+};
+
+struct nouveau_oclass *
 nvd0_disp_oclass = &(struct nv50_disp_impl) {
 	.base.base.handle = NV_ENGINE(DISP, 0x90),
 	.base.base.ofuncs = &(struct nouveau_ofuncs) {
@@ -1365,6 +1371,7 @@
 		.init = _nouveau_disp_init,
 		.fini = _nouveau_disp_fini,
 	},
+	.base.outp =  nvd0_disp_outp_sclass,
 	.mthd.core = &nvd0_disp_mast_mthd_chan,
 	.mthd.base = &nvd0_disp_sync_mthd_chan,
 	.mthd.ovly = &nvd0_disp_ovly_mthd_chan,