intel_mode_vblank_start
end = intel_mode_vblank_start(&crtc_state->hw.adjusted_mode);
int scanline = intel_mode_vblank_start(&crtc_state->hw.adjusted_mode) -
vbl_start = intel_mode_vblank_start(mode);
return intel_mode_vblank_start(mode) - intel_mode_vdisplay(mode);
evade->vblank_start = intel_mode_vblank_start(adjusted_mode);
vbl_start = intel_mode_vblank_start(mode);
int intel_mode_vblank_start(const struct drm_display_mode *mode);