text: /*
   * Copyright (C) 2012 Avionic Design GmbH
   * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #ifndef HOST1X_DRM_H
  #define HOST1X_DRM_H 1
  
  #include <uapi/drm/tegra_drm.h>
  #include <linux/host1x.h>
  #include <linux/iova.h>
  #include <linux/of_gpio.h>
  
  #include <drm/drmP.h>
  #include <drm/drm_crtc_helper.h>
  #include <drm/drm_edid.h>
  #include <drm/drm_encoder.h>
  #include <drm/drm_fb_helper.h>
  #include <drm/drm_fixed.h>
  
  #include "gem.h"
  #include "trace.h"
  
  struct reset_control;
  
  struct tegra_fb {
  	struct drm_framebuffer base;
  	struct tegra_bo **planes;
  	unsigned int num_planes;
  };
  
  #ifdef CONFIG_DRM_FBDEV_EMULATION
  struct tegra_fbdev {
  	struct drm_fb_helper base;
  	struct tegra_fb *fb;
  };
  #endif
  
  struct tegra_drm {
  	struct drm_device *drm;
  
  	struct iommu_domain *domain;
  	struct mutex mm_lock;
  	struct drm_mm mm;
  
  	struct {
  		struct iova_domain domain;
  		unsigned long shift;
  		unsigned long limit;
  	} carveout;
  
  	struct mutex clients_lock;
  	struct list_head clients;
  
  #ifdef CONFIG_DRM_FBDEV_EMULATION
  	struct tegra_fbdev *fbdev;
  #endif
  
  	unsigned int pitch_align;
  
  	struct {
  		struct drm_atomic_state *state;
  		struct work_struct work;
  		struct mutex lock;
  	} commit;
  
  	struct drm_atomic_state *state;
  };
  
  struct tegra_drm_client;
  
  struct tegra_drm_context {
  	struct tegra_drm_client *client;
  	struct host1x_channel *channel;
  	unsigned int id;
  };
  
  struct tegra_drm_client_ops {
  	int (*open_channel)(struct tegra_drm_client *client,
  			    struct tegra_drm_context *context);
  	void (*close_channel)(struct tegra_drm_context *context);
  	int (*is_addr_reg)(struct device *dev, u32 class, u32 offset);
  	int (*is_valid_class)(u32 class);
  	int (*submit)(struct tegra_drm_context *context,
  		      struct drm_tegra_submit *args, struct drm_device *drm,
  		      struct drm_file *file);
  };
  
  int tegra_drm_submit(struct tegra_drm_context *context,
  		     struct drm_tegra_submit *args, struct drm_device *drm,
  		     struct drm_file *file);
  
  struct tegra_drm_client {
  	struct host1x_client base;
  	struct list_head list;
  
  	const struct tegra_drm_client_ops *ops;
  };
  
  static inline struct tegra_drm_client *
  host1x_to_drm_client(struct host1x_client *client)
  {
  	return container_of(client, struct tegra_drm_client, base);
  }
  
  int tegra_drm_register_client(struct tegra_drm *tegra,
  			      struct tegra_drm_client *client);
  int tegra_drm_unregister_client(struct tegra_drm *tegra,
  				struct tegra_drm_client *client);
  
  int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
  int tegra_drm_exit(struct tegra_drm *tegra);
  
  void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova);
  void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
  		    dma_addr_t iova);
  
  struct tegra_dc_soc_info;
  struct tegra_output;
  
  struct tegra_dc_stats {
  	unsigned long frames;
  	unsigned long vblank;
  	unsigned long underflow;
  	unsigned long overflow;
  };
  
  struct tegra_dc {
  	struct host1x_client client;
  	struct host1x_syncpt *syncpt;
  	struct device *dev;
  	spinlock_t lock;
  
  	struct drm_crtc base;
  	unsigned int powergate;
  	int pipe;
  
  	struct clk *clk;
  	struct reset_control *rst;
  	void __iomem *regs;
  	int irq;
  
  	struct tegra_output *rgb;
  
  	struct tegra_dc_stats stats;
  	struct list_head list;
  
  	struct drm_info_list *debugfs_files;
  	struct drm_minor *minor;
  	struct dentry *debugfs;
  
  	/* page-flip handling */
  	struct drm_pending_vblank_event *event;
  
  	const struct tegra_dc_soc_info *soc;
  
  	struct iommu_domain *domain;
  };
  
  static inline struct tegra_dc *
  host1x_client_to_dc(struct host1x_client *client)
  {
  	return container_of(client, struct tegra_dc, client);
  }
  
  static inline struct tegra_dc *to_tegra_dc(struct drm_crtc *crtc)
  {
  	return crtc ? container_of(crtc, struct tegra_dc, base) : NULL;
  }
  
  static inline void tegra_dc_writel(struct tegra_dc *dc, u32 value,
  				   unsigned int offset)
  {
  	trace_dc_writel(dc->dev, offset, value);
  	writel(value, dc->regs + (offset << 2));
  }
  
  static inline u32 tegra_dc_readl(struct tegra_dc *dc, unsigned int offset)
  {
  	u32 value = readl(dc->regs + (offset << 2));
  
  	trace_dc_readl(dc->dev, offset, value);
  
  	return value;
  }
  
  struct tegra_dc_window {
  	struct {
  		unsigned int x;
  		unsigned int y;
  		unsigned int w;
  		unsigned int h;
  	} src;
  	struct {
  		unsigned int x;
  		unsigned int y;
  		unsigned int w;
  		unsigned int h;
  	} dst;
  	unsigned int bits_per_pixel;
  	unsigned int stride[2];
  	unsigned long base[3];
  	bool bottom_up;
  
  	struct tegra_bo_tiling tiling;
  	u32 format;
  	u32 swap;
  };
  
  /* from dc.c */
  void tegra_dc_commit(struct tegra_dc *dc);
  int tegra_dc_state_setup_clock(struct tegra_dc *dc,
  			       struct drm_crtc_state *crtc_state,
  			       struct clk *clk, unsigned long pclk,
  			       unsigned int div);
  
  struct tegra_output {
  	struct device_node *of_node;
  	struct device *dev;
  
  	struct drm_panel *panel;
  	struct i2c_adapter *ddc;
  	const struct edid *edid;
  	unsigned int hpd_irq;
  	int hpd_gpio;
  	enum of_gpio_flags hpd_gpio_flags;
  
  	struct drm_encoder encoder;
  	struct drm_connector connector;
  };
  
  static inline struct tegra_output *encoder_to_output(struct drm_encoder *e)
  {
  	return container_of(e, struct tegra_output, encoder);
  }
  
  static inline struct tegra_output *connector_to_output(struct drm_connector *c)
  {
  	return container_of(c, struct tegra_output, connector);
  }
  
  /* from rgb.c */
  int tegra_dc_rgb_probe(struct tegra_dc *dc);
  int tegra_dc_rgb_remove(struct tegra_dc *dc);
  int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc);
  int tegra_dc_rgb_exit(struct tegra_dc *dc);
  
  /* from output.c */
  int tegra_output_probe(struct tegra_output *output);
  void tegra_output_remove(struct tegra_output *output);
  int tegra_output_init(struct drm_device *drm, struct tegra_output *output);
  void tegra_output_exit(struct tegra_output *output);
  
  int tegra_output_connector_get_modes(struct drm_connector *connector);
  enum drm_connector_status
  tegra_output_connector_detect(struct drm_connector *connector, bool force);
  void tegra_output_connector_destroy(struct drm_connector *connector);
  
  void tegra_output_encoder_destroy(struct drm_encoder *encoder);
  
  /* from dpaux.c */
  struct drm_dp_link;
  
  struct drm_dp_aux *drm_dp_aux_find_by_of_node(struct device_node *np);
  enum drm_connector_status drm_dp_aux_detect(struct drm_dp_aux *aux);
  int drm_dp_aux_attach(struct drm_dp_aux *aux, struct tegra_output *output);
  int drm_dp_aux_detach(struct drm_dp_aux *aux);
  int drm_dp_aux_enable(struct drm_dp_aux *aux);
  int drm_dp_aux_disable(struct drm_dp_aux *aux);
  int drm_dp_aux_prepare(struct drm_dp_aux *aux, u8 encoding);
  int drm_dp_aux_train(struct drm_dp_aux *aux, struct drm_dp_link *link,
  		     u8 pattern);
  
  /* from fb.c */
  struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
  				    unsigned int index);
  bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer);
  int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
  			struct tegra_bo_tiling *tiling);
  struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
  					struct drm_file *file,
  					const struct drm_mode_fb_cmd2 *cmd);
  int tegra_drm_fb_prepare(struct drm_device *drm);
  void tegra_drm_fb_free(struct drm_device *drm);
  int tegra_drm_fb_init(struct drm_device *drm);
  void tegra_drm_fb_exit(struct drm_device *drm);
  void tegra_drm_fb_suspend(struct drm_device *drm);
  void tegra_drm_fb_resume(struct drm_device *drm);
  #ifdef CONFIG_DRM_FBDEV_EMULATION
  void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev);
  void tegra_fb_output_poll_changed(struct drm_device *drm);
  #endif
  
  extern struct platform_driver tegra_dc_driver;
  extern struct platform_driver tegra_hdmi_driver;
  extern struct platform_driver tegra_dsi_driver;
  extern struct platform_driver tegra_dpaux_driver;
  extern struct platform_driver tegra_sor_driver;
  extern struct platform_driver tegra_gr2d_driver;
  extern struct platform_driver tegra_gr3d_driver;
  extern struct platform_driver tegra_vic_driver;
  
  #endif /* HOST1X_DRM_H */
  