g4x_raw_fbc_wm_set
dirty |= g4x_raw_fbc_wm_set(crtc_state, 0, 0);
dirty |= g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX);
g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX);