/*
 * Copyright 2015 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

#ifndef __AMDGPU_DM_H__
#define __AMDGPU_DM_H__

#include <drm/drm_atomic.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_dp_mst_helper.h>
#include <drm/drm_plane.h>

/*
 * This file contains the definition for amdgpu_display_manager
 * and its API for amdgpu driver's use.
 * This component provides all the display related functionality
 * and this is the only component that calls DAL API.
 * The API contained here intended for amdgpu driver use.
 * The API that is called directly from KMS framework is located
 * in amdgpu_dm_kms.h file
 */

#define AMDGPU_DM_MAX_DISPLAY_INDEX 31
/*
#include "include/amdgpu_dal_power_if.h"
#include "amdgpu_dm_irq.h"
*/

#include "irq_types.h"
#include "signal_types.h"

/* Forward declarations */
struct amdgpu_device;
struct drm_device;
struct amdgpu_dm_irq_handler_data;
struct dc;

struct common_irq_params {
	struct amdgpu_device *adev;
	enum dc_irq_source irq_src;
};

/**
 * struct irq_list_head - Linked-list for low context IRQ handlers.
 *
 * @head: The list_head within &struct handler_data
 * @work: A work_struct containing the deferred handler work
 */
struct irq_list_head {
	struct list_head head;
	/* In case this interrupt needs post-processing, 'work' will be queued*/
	struct work_struct work;
};

/**
 * struct dm_compressor_info - Buffer info used by frame buffer compression
 * @cpu_addr: MMIO cpu addr
 * @bo_ptr: Pointer to the buffer object
 * @gpu_addr: MMIO gpu addr
 */
struct dm_comressor_info {
	void *cpu_addr;
	struct amdgpu_bo *bo_ptr;
	uint64_t gpu_addr;
};

/**
 * struct amdgpu_dm_backlight_caps - Usable range of backlight values from ACPI
 * @min_input_signal: minimum possible input in range 0-255
 * @max_input_signal: maximum possible input in range 0-255
 * @caps_valid: true if these values are from the ACPI interface
 */
struct amdgpu_dm_backlight_caps {
	int min_input_signal;
	int max_input_signal;
	bool caps_valid;
};

/**
 * struct amdgpu_display_manager - Central amdgpu display manager device
 *
 * @dc: Display Core control structure
 * @adev: AMDGPU base driver structure
 * @ddev: DRM base driver structure
 * @display_indexes_num: Max number of display streams supported
 * @irq_handler_list_table_lock: Synchronizes access to IRQ tables
 * @backlight_dev: Backlight control device
 * @cached_state: Caches device atomic state for suspend/resume
 * @compressor: Frame buffer compression buffer. See &struct dm_comressor_info
 */
struct amdgpu_display_manager {

	struct dc *dc;

	/**
	 * @cgs_device:
	 *
	 * The Common Graphics Services device. It provides an interface for
	 * accessing registers.
	 */
	struct cgs_device *cgs_device;

	struct amdgpu_device *adev;
	struct drm_device *ddev;
	u16 display_indexes_num;

	/**
	 * @atomic_obj
	 *
	 * In combination with &dm_atomic_state it helps manage
	 * global atomic state that doesn't map cleanly into existing
	 * drm resources, like &dc_context.
	 */
	struct drm_private_obj atomic_obj;

	/**
	 * @dc_lock:
	 *
	 * Guards access to DC functions that can issue register write
	 * sequences.
	 */
	struct mutex dc_lock;

	/**
	 * @irq_handler_list_low_tab:
	 *
	 * Low priority IRQ handler table.
	 *
	 * It is a n*m table consisting of n IRQ sources, and m handlers per IRQ
	 * source. Low priority IRQ handlers are deferred to a workqueue to be
	 * processed. Hence, they can sleep.
	 *
	 * Note that handlers are called in the same order as they were
	 * registered (FIFO).
	 */
	struct irq_list_head irq_handler_list_low_tab[DAL_IRQ_SOURCES_NUMBER];

	/**
	 * @irq_handler_list_high_tab:
	 *
	 * High priority IRQ handler table.
	 *
	 * It is a n*m table, same as &irq_handler_list_low_tab. However,
	 * handlers in this table are not deferred and are called immediately.
	 */
	struct list_head irq_handler_list_high_tab[DAL_IRQ_SOURCES_NUMBER];

	/**
	 * @pflip_params:
	 *
	 * Page flip IRQ parameters, passed to registered handlers when
	 * triggered.
	 */
	struct common_irq_params
	pflip_params[DC_IRQ_SOURCE_PFLIP_LAST - DC_IRQ_SOURCE_PFLIP_FIRST + 1];

	/**
	 * @vblank_params:
	 *
	 * Vertical blanking IRQ parameters, passed to registered handlers when
	 * triggered.
	 */
	struct common_irq_params
	vblank_params[DC_IRQ_SOURCE_VBLANK6 - DC_IRQ_SOURCE_VBLANK1 + 1];

	/**
	 * @vupdate_params:
	 *
	 * Vertical update IRQ parameters, passed to registered handlers when
	 * triggered.
	 */
	struct common_irq_params
	vupdate_params[DC_IRQ_SOURCE_VUPDATE6 - DC_IRQ_SOURCE_VUPDATE1 + 1];

	spinlock_t irq_handler_list_table_lock;

	struct backlight_device *backlight_dev;

	const struct dc_link *backlight_link;
	struct amdgpu_dm_backlight_caps backlight_caps;

	struct mod_freesync *freesync_module;

	struct drm_atomic_state *cached_state;

	struct dm_comressor_info compressor;

	const struct firmware *fw_dmcu;
	uint32_t dmcu_fw_version;
};

struct amdgpu_dm_connector {

	struct drm_connector base;
	uint32_t connector_id;

	/* we need to mind the EDID between detect
	   and get modes due to analog/digital/tvencoder */
	struct edid *edid;

	/* shared with amdgpu */
	struct amdgpu_hpd hpd;

	/* number of modes generated from EDID at 'dc_sink' */
	int num_modes;

	/* The 'old' sink - before an HPD.
	 * The 'current' sink is in dc_link->sink. */
	struct dc_sink *dc_sink;
	struct dc_link *dc_link;
	struct dc_sink *dc_em_sink;

	/* DM only */
	struct drm_dp_mst_topology_mgr mst_mgr;
	struct amdgpu_dm_dp_aux dm_dp_aux;
	struct drm_dp_mst_port *port;
	struct amdgpu_dm_connector *mst_port;
	struct amdgpu_encoder *mst_encoder;

	/* TODO see if we can merge with ddc_bus or make a dm_connector */
	struct amdgpu_i2c_adapter *i2c;

	/* Monitor range limits */
	int min_vfreq ;
	int max_vfreq ;
	int pixel_clock_mhz;

	struct mutex hpd_lock;

	bool fake_enable;
#ifdef CONFIG_DEBUG_FS
	uint32_t debugfs_dpcd_address;
	uint32_t debugfs_dpcd_size;
#endif
};

#define to_amdgpu_dm_connector(x) container_of(x, struct amdgpu_dm_connector, base)

extern const struct amdgpu_ip_block_version dm_ip_block;

struct amdgpu_framebuffer;
struct amdgpu_display_manager;
struct dc_validation_set;
struct dc_plane_state;

struct dm_plane_state {
	struct drm_plane_state base;
	struct dc_plane_state *dc_state;
};

struct dm_crtc_state {
	struct drm_crtc_state base;
	struct dc_stream_state *stream;

	int active_planes;
	bool interrupts_enabled;

	int crc_skip_count;
	bool crc_enabled;

	bool freesync_timing_changed;
	bool freesync_vrr_info_changed;

	bool vrr_supported;
	struct mod_freesync_config freesync_config;
	struct mod_vrr_params vrr_params;
	struct dc_info_packet vrr_infopacket;

	int abm_level;
};

#define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)

struct dm_atomic_state {
	struct drm_private_state base;

	struct dc_state *context;
};

#define to_dm_atomic_state(x) container_of(x, struct dm_atomic_state, base)

struct dm_connector_state {
	struct drm_connector_state base;

	enum amdgpu_rmx_type scaling;
	uint8_t underscan_vborder;
	uint8_t underscan_hborder;
	bool underscan_enable;
	bool freesync_capable;
	uint8_t abm_level;
};

#define to_dm_connector_state(x)\
	container_of((x), struct dm_connector_state, base)

void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector);
struct drm_connector_state *
amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector);
int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
					    struct drm_connector_state *state,
					    struct drm_property *property,
					    uint64_t val);

int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
					    const struct drm_connector_state *state,
					    struct drm_property *property,
					    uint64_t *val);

int amdgpu_dm_get_encoder_crtc_mask(struct amdgpu_device *adev);

void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
				     struct amdgpu_dm_connector *aconnector,
				     int connector_type,
				     struct dc_link *link,
				     int link_index);

enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connector,
				   struct drm_display_mode *mode);

void dm_restore_drm_connector_state(struct drm_device *dev,
				    struct drm_connector *connector);

void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
					struct edid *edid);

/* amdgpu_dm_crc.c */
#ifdef CONFIG_DEBUG_FS
int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name);
int amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc,
				     const char *src_name,
				     size_t *values_cnt);
void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc);
#else
#define amdgpu_dm_crtc_set_crc_source NULL
#define amdgpu_dm_crtc_verify_crc_source NULL
#define amdgpu_dm_crtc_handle_crc_irq(x)
#endif

#define MAX_COLOR_LUT_ENTRIES 4096
/* Legacy gamm LUT users such as X doesn't like large LUT sizes */
#define MAX_COLOR_LEGACY_LUT_ENTRIES 256

void amdgpu_dm_init_color_mod(void);
int amdgpu_dm_set_degamma_lut(struct drm_crtc_state *crtc_state,
			      struct dc_plane_state *dc_plane_state);
void amdgpu_dm_set_ctm(struct dm_crtc_state *crtc);
int amdgpu_dm_set_regamma_lut(struct dm_crtc_state *crtc);

extern const struct drm_encoder_helper_funcs amdgpu_dm_encoder_helper_funcs;

#endif /* __AMDGPU_DM_H__ */