/*
 * 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 <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fixed.h>

#include "gem.h"

struct reset_control;

struct tegra_fb {
        struct drm_framebuffer base;
        struct tegra_bo **planes;
        unsigned int num_planes;
};

#ifdef CONFIG_DRM_TEGRA_FBDEV
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 drm_mm mm;

        struct mutex clients_lock;
        struct list_head clients;

#ifdef CONFIG_DRM_TEGRA_FBDEV
        struct tegra_fbdev *fbdev;
#endif

        unsigned int pitch_align;
};

struct tegra_drm_client;

struct tegra_drm_context {
        struct tegra_drm_client *client;
        struct host1x_channel *channel;
        struct list_head list;
};

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 (*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);

struct tegra_dc_soc_info;
struct tegra_output;

struct tegra_dc {
        struct host1x_client client;
        struct device *dev;
        spinlock_t lock;

        struct drm_crtc base;
        int powergate;
        int pipe;

        struct clk *clk;
        struct reset_control *rst;
        void __iomem *regs;
        int irq;

        struct tegra_output *rgb;

        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 long offset)
{
        writel(value, dc->regs + (offset << 2));
}

static inline u32 tegra_dc_readl(struct tegra_dc *dc, unsigned long offset)
{
        return readl(dc->regs + (offset << 2));
}

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 format;
        unsigned int swap;
        unsigned int stride[2];
        unsigned long base[3];
        bool bottom_up;

        struct tegra_bo_tiling tiling;
};

/* from dc.c */
void tegra_dc_enable_vblank(struct tegra_dc *dc);
void tegra_dc_disable_vblank(struct tegra_dc *dc);
void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);

struct tegra_output_ops {
        int (*enable)(struct tegra_output *output);
        int (*disable)(struct tegra_output *output);
        int (*setup_clock)(struct tegra_output *output, struct clk *clk,
                           unsigned long pclk, unsigned int *div);
        int (*check_mode)(struct tegra_output *output,
                          struct drm_display_mode *mode,
                          enum drm_mode_status *status);
        enum drm_connector_status (*detect)(struct tegra_output *output);
};

enum tegra_output_type {
        TEGRA_OUTPUT_RGB,
        TEGRA_OUTPUT_HDMI,
        TEGRA_OUTPUT_DSI,
        TEGRA_OUTPUT_EDP,
};

struct tegra_output {
        struct device_node *of_node;
        struct device *dev;

        const struct tegra_output_ops *ops;
        enum tegra_output_type type;

        struct drm_panel *panel;
        struct i2c_adapter *ddc;
        const struct edid *edid;
        unsigned int hpd_irq;
        int hpd_gpio;

        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);
}

static inline int tegra_output_enable(struct tegra_output *output)
{
        if (output && output->ops && output->ops->enable)
                return output->ops->enable(output);

        return output ? -ENOSYS : -EINVAL;
}

static inline int tegra_output_disable(struct tegra_output *output)
{
        if (output && output->ops && output->ops->disable)
                return output->ops->disable(output);

        return output ? -ENOSYS : -EINVAL;
}

static inline int tegra_output_setup_clock(struct tegra_output *output,
                                           struct clk *clk, unsigned long pclk,
                                           unsigned int *div)
{
        if (output && output->ops && output->ops->setup_clock)
                return output->ops->setup_clock(output, clk, pclk, div);

        return output ? -ENOSYS : -EINVAL;
}

static inline int tegra_output_check_mode(struct tegra_output *output,
                                          struct drm_display_mode *mode,
                                          enum drm_mode_status *status)
{
        if (output && output->ops && output->ops->check_mode)
                return output->ops->check_mode(output, mode, status);

        return output ? -ENOSYS : -EINVAL;
}

/* 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);
int tegra_output_remove(struct tegra_output *output);
int tegra_output_init(struct drm_device *drm, struct tegra_output *output);
int tegra_output_exit(struct tegra_output *output);

/* from dpaux.c */
struct tegra_dpaux;
struct drm_dp_link;

struct tegra_dpaux *tegra_dpaux_find_by_of_node(struct device_node *np);
enum drm_connector_status tegra_dpaux_detect(struct tegra_dpaux *dpaux);
int tegra_dpaux_attach(struct tegra_dpaux *dpaux, struct tegra_output *output);
int tegra_dpaux_detach(struct tegra_dpaux *dpaux);
int tegra_dpaux_enable(struct tegra_dpaux *dpaux);
int tegra_dpaux_disable(struct tegra_dpaux *dpaux);
int tegra_dpaux_prepare(struct tegra_dpaux *dpaux, u8 encoding);
int tegra_dpaux_train(struct tegra_dpaux *dpaux, 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);
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);
#ifdef CONFIG_DRM_TEGRA_FBDEV
void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev);
#endif

extern struct platform_driver tegra_dc_driver;
extern struct platform_driver tegra_dsi_driver;
extern struct platform_driver tegra_sor_driver;
extern struct platform_driver tegra_hdmi_driver;
extern struct platform_driver tegra_dpaux_driver;
extern struct platform_driver tegra_gr2d_driver;
extern struct platform_driver tegra_gr3d_driver;

#endif /* HOST1X_DRM_H */