dsb_scanline_to_hw
dsb_scanline_to_hw(state, crtc, dsb_dewake_scanline_start(state, crtc));
lower_in = dsb_scanline_to_hw(state, crtc, lower_in);
upper_in = dsb_scanline_to_hw(state, crtc, upper_in);
lower_out = dsb_scanline_to_hw(state, crtc, lower_out);
upper_out = dsb_scanline_to_hw(state, crtc, upper_out);
int hw_dewake_scanline = dsb_scanline_to_hw(state, crtc, dewake_scanline);