nvkm_dp_train_pattern
nvkm_dp_train_pattern(lt, 4);
nvkm_dp_train_pattern(lt, 4);
nvkm_dp_train_pattern(lt, 3);
nvkm_dp_train_pattern(lt, 2);
nvkm_dp_train_pattern(lt, 1);
nvkm_dp_train_pattern(<, 0);