nouveau_dp_train
nouveau_dp_train(mstm->outp, true, 0, 0);
nouveau_dp_train(nv_encoder, false, mode->clock, asyh->or.bpc);
nouveau_dp_train(nv_encoder, false, asyh->state.adjusted_mode.clock, 6);
bool nouveau_dp_train(struct nouveau_encoder *, bool mst, u32 khz, u8 bpc);