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 *
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 *
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 * Helper functions to assist with creation and handling of CRTC primary
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 * Helper functions to assist with creation and handling of CRTC primary
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 * planes.
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 * planes.
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 */
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 */
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extern int drm_crtc_init(struct drm_device *dev,
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			 struct drm_crtc *crtc,
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int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
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			 const struct drm_crtc_funcs *funcs);
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		  const struct drm_crtc_funcs *funcs);
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/**
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/**
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 * drm_plane_helper_funcs - helper operations for CRTCs
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 * drm_plane_helper_funcs - helper operations for CRTCs
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 * @prepare_fb: prepare a framebuffer for use by the plane
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 * @prepare_fb: prepare a framebuffer for use by the plane
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 * @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
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 * @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
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 * @atomic_check: check that a given atomic state is valid and can be applied
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 * @atomic_check: check that a given atomic state is valid and can be applied
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 * @atomic_update: apply an atomic state to the plane (mandatory)
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 * @atomic_update: apply an atomic state to the plane
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 * @atomic_disable: disable the plane
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 *
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 *
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 * The helper operations are called by the mid-layer CRTC helper.
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 * The helper operations are called by the mid-layer CRTC helper.
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 */
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 */
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struct drm_plane_helper_funcs {
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struct drm_plane_helper_funcs {
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	int (*prepare_fb)(struct drm_plane *plane,
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	int (*prepare_fb)(struct drm_plane *plane,
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			  struct drm_framebuffer *fb);
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			  const struct drm_plane_state *new_state);
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	void (*cleanup_fb)(struct drm_plane *plane,
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	void (*cleanup_fb)(struct drm_plane *plane,
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			   struct drm_framebuffer *fb);
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			   const struct drm_plane_state *old_state);
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	int (*atomic_check)(struct drm_plane *plane,
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	int (*atomic_check)(struct drm_plane *plane,
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			    struct drm_plane_state *state);
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	void (*atomic_update)(struct drm_plane *plane,
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			    struct drm_plane_state *state);
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			      struct drm_plane_state *old_state);
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	void (*atomic_update)(struct drm_plane *plane,
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	void (*atomic_disable)(struct drm_plane *plane,
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			      struct drm_plane_state *old_state);
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			       struct drm_plane_state *old_state);
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};
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};
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static inline void drm_plane_helper_add(struct drm_plane *plane,
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static inline void drm_plane_helper_add(struct drm_plane *plane,
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					const struct drm_plane_helper_funcs *funcs)
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					const struct drm_plane_helper_funcs *funcs)
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{
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{
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	plane->helper_private = (void *)funcs;
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	plane->helper_private = funcs;
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}
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}
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extern int drm_plane_helper_check_update(struct drm_plane *plane,
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int drm_plane_helper_check_update(struct drm_plane *plane,
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					 struct drm_crtc *crtc,
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				  struct drm_crtc *crtc,
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					 struct drm_framebuffer *fb,
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				  struct drm_framebuffer *fb,
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					 struct drm_rect *src,
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				  struct drm_rect *src,
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					 struct drm_rect *dest,
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				  struct drm_rect *dest,
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					 const struct drm_rect *clip,
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				  const struct drm_rect *clip,
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					 int min_scale,
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				  int min_scale,
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					 int max_scale,
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				  int max_scale,
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					 bool can_position,
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				  bool can_position,
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					 bool can_update_disabled,
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				  bool can_update_disabled,
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					 bool *visible);
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				  bool *visible);
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extern int drm_primary_helper_update(struct drm_plane *plane,
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int drm_primary_helper_update(struct drm_plane *plane,
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				     struct drm_crtc *crtc,
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			      struct drm_crtc *crtc,
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				     struct drm_framebuffer *fb,
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			      struct drm_framebuffer *fb,
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				     int crtc_x, int crtc_y,
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			      int crtc_x, int crtc_y,
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				     unsigned int crtc_w, unsigned int crtc_h,
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			      unsigned int crtc_w, unsigned int crtc_h,
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				     uint32_t src_x, uint32_t src_y,
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				     uint32_t src_w, uint32_t src_h);
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extern int drm_primary_helper_disable(struct drm_plane *plane);
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extern void drm_primary_helper_destroy(struct drm_plane *plane);
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extern const struct drm_plane_funcs drm_primary_helper_funcs;
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			      uint32_t src_x, uint32_t src_y,
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extern struct drm_plane *drm_primary_helper_create_plane(struct drm_device *dev,
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			      uint32_t src_w, uint32_t src_h);
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							 const uint32_t *formats,
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int drm_primary_helper_disable(struct drm_plane *plane);
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							 int num_formats);
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void drm_primary_helper_destroy(struct drm_plane *plane);