text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * Copyright (C) STMicroelectronics SA 2014
   * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
   */
  
  #ifndef _STI_VTG_H_
  #define _STI_VTG_H_
  
  #define VTG_TOP_FIELD_EVENT     1
  #define VTG_BOTTOM_FIELD_EVENT  2
  
  #define VTG_SYNC_ID_HDMI        1
  #define VTG_SYNC_ID_HDDCS       2
  #define VTG_SYNC_ID_HDF         3
  #define VTG_SYNC_ID_DVO         4
  
  struct sti_vtg;
  struct drm_display_mode;
  struct notifier_block;
  
  struct sti_vtg *of_vtg_find(struct device_node *np);
  void sti_vtg_set_config(struct sti_vtg *vtg,
  		const struct drm_display_mode *mode);
  int sti_vtg_register_client(struct sti_vtg *vtg, struct notifier_block *nb,
  			    struct drm_crtc *crtc);
  int sti_vtg_unregister_client(struct sti_vtg *vtg,
  		struct notifier_block *nb);
  
  u32 sti_vtg_get_line_number(struct drm_display_mode mode, int y);
  u32 sti_vtg_get_pixel_number(struct drm_display_mode mode, int x);
  
  #endif
  