[deliverable/linux.git] / drivers / gpu / drm / exynos / exynos_drm_drv.h

/* exynos_drm_drv.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef _EXYNOS_DRM_DRV_H_
#define _EXYNOS_DRM_DRV_H_

#include <linux/module.h>

#define MAX_CRTC	3
#define MAX_PLANE	5
#define MAX_FB_BUFFER	4
#define DEFAULT_ZPOS	-1

#define _wait_for(COND, MS) ({ \
	unsigned long timeout__ = jiffies + msecs_to_jiffies(MS);	\
	int ret__ = 0;							\
	while (!(COND)) {						\
		if (time_after(jiffies, timeout__)) {			\
			ret__ = -ETIMEDOUT;				\
			break;						\
		}							\
	}								\
	ret__;								\
})

#define wait_for(COND, MS) _wait_for(COND, MS)

struct drm_device;
struct drm_connector;

/* This enumerates device type. */
enum exynos_drm_device_type {
	EXYNOS_DEVICE_TYPE_NONE,
	EXYNOS_DEVICE_TYPE_CRTC,
	EXYNOS_DEVICE_TYPE_CONNECTOR,
};

/* this enumerates display type. */
enum exynos_drm_output_type {
	EXYNOS_DISPLAY_TYPE_NONE,
	/* RGB or CPU Interface. */
	EXYNOS_DISPLAY_TYPE_LCD,
	/* HDMI Interface. */
	EXYNOS_DISPLAY_TYPE_HDMI,
	/* Virtual Display Interface. */
	EXYNOS_DISPLAY_TYPE_VIDI,
};

/*
 * Exynos drm common overlay structure.
 *
 * @fb_x: offset x on a framebuffer to be displayed.
 *	- the unit is screen coordinates.
 * @fb_y: offset y on a framebuffer to be displayed.
 *	- the unit is screen coordinates.
 * @fb_width: width of a framebuffer.
 * @fb_height: height of a framebuffer.
 * @src_width: width of a partial image to be displayed from framebuffer.
 * @src_height: height of a partial image to be displayed from framebuffer.
 * @crtc_x: offset x on hardware screen.
 * @crtc_y: offset y on hardware screen.
 * @crtc_width: window width to be displayed (hardware screen).
 * @crtc_height: window height to be displayed (hardware screen).
 * @mode_width: width of screen mode.
 * @mode_height: height of screen mode.
 * @refresh: refresh rate.
 * @scan_flag: interlace or progressive way.
 *	(it could be DRM_MODE_FLAG_*)
 * @bpp: pixel size.(in bit)
 * @pixel_format: fourcc pixel format of this overlay
 * @dma_addr: array of bus(accessed by dma) address to the memory region
 *	      allocated for a overlay.
 * @zpos: order of overlay layer(z position).
 * @default_win: a window to be enabled.
 * @color_key: color key on or off.
 * @index_color: if using color key feature then this value would be used
 *			as index color.
 * @local_path: in case of lcd type, local path mode on or off.
 * @transparency: transparency on or off.
 * @activated: activated or not.
 *
 * this structure is common to exynos SoC and its contents would be copied
 * to hardware specific overlay info.
 */
struct exynos_drm_overlay {
	unsigned int fb_x;
	unsigned int fb_y;
	unsigned int fb_width;
	unsigned int fb_height;
	unsigned int src_width;
	unsigned int src_height;
	unsigned int crtc_x;
	unsigned int crtc_y;
	unsigned int crtc_width;
	unsigned int crtc_height;
	unsigned int mode_width;
	unsigned int mode_height;
	unsigned int refresh;
	unsigned int scan_flag;
	unsigned int bpp;
	unsigned int pitch;
	uint32_t pixel_format;
	dma_addr_t dma_addr[MAX_FB_BUFFER];
	int zpos;

	bool default_win;
	bool color_key;
	unsigned int index_color;
	bool local_path;
	bool transparency;
	bool activated;
};

/*
 * Exynos DRM Display Structure.
 *	- this structure is common to analog tv, digital tv and lcd panel.
 *
 * @remove: cleans up the display for removal
 * @mode_fixup: fix mode data comparing to hw specific display mode.
 * @mode_set: convert drm_display_mode to hw specific display mode and
 *	      would be called by encoder->mode_set().
 * @check_mode: check if mode is valid or not.
 * @dpms: display device on or off.
 * @commit: apply changes to hw
 */
struct exynos_drm_display;
struct exynos_drm_display_ops {
	int (*create_connector)(struct exynos_drm_display *display,
				struct drm_encoder *encoder);
	void (*remove)(struct exynos_drm_display *display);
	void (*mode_fixup)(struct exynos_drm_display *display,
				struct drm_connector *connector,
				const struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode);
	void (*mode_set)(struct exynos_drm_display *display,
				struct drm_display_mode *mode);
	int (*check_mode)(struct exynos_drm_display *display,
				struct drm_display_mode *mode);
	void (*dpms)(struct exynos_drm_display *display, int mode);
	void (*commit)(struct exynos_drm_display *display);
};

/*
 * Exynos drm display structure, maps 1:1 with an encoder/connector
 *
 * @list: the list entry for this manager
 * @type: one of EXYNOS_DISPLAY_TYPE_LCD and HDMI.
 * @encoder: encoder object this display maps to
 * @connector: connector object this display maps to
 * @ops: pointer to callbacks for exynos drm specific functionality
 * @ctx: A pointer to the display's implementation specific context
 */
struct exynos_drm_display {
	struct list_head list;
	enum exynos_drm_output_type type;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	struct exynos_drm_display_ops *ops;
	void *ctx;
};

/*
 * Exynos drm manager ops
 *
 * @dpms: control device power.
 * @mode_fixup: fix mode data before applying it
 * @mode_set: set the given mode to the manager
 * @commit: set current hw specific display mode to hw.
 * @enable_vblank: specific driver callback for enabling vblank interrupt.
 * @disable_vblank: specific driver callback for disabling vblank interrupt.
 * @wait_for_vblank: wait for vblank interrupt to make sure that
 *	hardware overlay is updated.
 * @win_mode_set: copy drm overlay info to hw specific overlay info.
 * @win_commit: apply hardware specific overlay data to registers.
 * @win_enable: enable hardware specific overlay.
 * @win_disable: disable hardware specific overlay.
 * @te_handler: trigger to transfer video image at the tearing effect
 *	synchronization signal if there is a page flip request.
 */
struct exynos_drm_manager;
struct exynos_drm_manager_ops {
	void (*dpms)(struct exynos_drm_manager *mgr, int mode);
	bool (*mode_fixup)(struct exynos_drm_manager *mgr,
				const struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode);
	void (*mode_set)(struct exynos_drm_manager *mgr,
				const struct drm_display_mode *mode);
	void (*commit)(struct exynos_drm_manager *mgr);
	int (*enable_vblank)(struct exynos_drm_manager *mgr);
	void (*disable_vblank)(struct exynos_drm_manager *mgr);
	void (*wait_for_vblank)(struct exynos_drm_manager *mgr);
	void (*win_mode_set)(struct exynos_drm_manager *mgr,
				struct exynos_drm_overlay *overlay);
	void (*win_commit)(struct exynos_drm_manager *mgr, int zpos);
	void (*win_enable)(struct exynos_drm_manager *mgr, int zpos);
	void (*win_disable)(struct exynos_drm_manager *mgr, int zpos);
	void (*te_handler)(struct exynos_drm_manager *mgr);
};

/*
 * Exynos drm common manager structure, maps 1:1 with a crtc
 *
 * @list: the list entry for this manager
 * @type: one of EXYNOS_DISPLAY_TYPE_LCD and HDMI.
 * @drm_dev: pointer to the drm device
 * @crtc: crtc object.
 * @pipe: the pipe number for this crtc/manager
 * @ops: pointer to callbacks for exynos drm specific functionality
 * @ctx: A pointer to the manager's implementation specific context
 */
struct exynos_drm_manager {
	struct list_head list;
	enum exynos_drm_output_type type;
	struct drm_device *drm_dev;
	struct drm_crtc *crtc;
	int pipe;
	struct exynos_drm_manager_ops *ops;
	void *ctx;
};

struct exynos_drm_g2d_private {
	struct device		*dev;
	struct list_head	inuse_cmdlist;
	struct list_head	event_list;
	struct list_head	userptr_list;
};

struct drm_exynos_file_private {
	struct exynos_drm_g2d_private	*g2d_priv;
	struct device			*ipp_dev;
};

/*
 * Exynos drm private structure.
 *
 * @da_start: start address to device address space.
 *	with iommu, device address space starts from this address
 *	otherwise default one.
 * @da_space_size: size of device address space.
 *	if 0 then default value is used for it.
 * @pipe: the pipe number for this crtc/manager.
 */
struct exynos_drm_private {
	struct drm_fb_helper *fb_helper;

	/* list head for new event to be added. */
	struct list_head pageflip_event_list;

	/*
	 * created crtc object would be contained at this array and
	 * this array is used to be aware of which crtc did it request vblank.
	 */
	struct drm_crtc *crtc[MAX_CRTC];
	struct drm_property *plane_zpos_property;
	struct drm_property *crtc_mode_property;

	unsigned long da_start;
	unsigned long da_space_size;

	unsigned int pipe;
};

/*
 * Exynos drm sub driver structure.
 *
 * @list: sub driver has its own list object to register to exynos drm driver.
 * @dev: pointer to device object for subdrv device driver.
 * @drm_dev: pointer to drm_device and this pointer would be set
 *	when sub driver calls exynos_drm_subdrv_register().
 * @manager: subdrv has its own manager to control a hardware appropriately
 *     and we can access a hardware drawing on this manager.
 * @probe: this callback would be called by exynos drm driver after
 *     subdrv is registered to it.
 * @remove: this callback is used to release resources created
 *     by probe callback.
 * @open: this would be called with drm device file open.
 * @close: this would be called with drm device file close.
 */
struct exynos_drm_subdrv {
	struct list_head list;
	struct device *dev;
	struct drm_device *drm_dev;

	int (*probe)(struct drm_device *drm_dev, struct device *dev);
	void (*remove)(struct drm_device *drm_dev, struct device *dev);
	int (*open)(struct drm_device *drm_dev, struct device *dev,
			struct drm_file *file);
	void (*close)(struct drm_device *drm_dev, struct device *dev,
			struct drm_file *file);
};

 /* This function would be called by non kms drivers such as g2d and ipp. */
int exynos_drm_subdrv_register(struct exynos_drm_subdrv *drm_subdrv);

/* this function removes subdrv list from exynos drm driver */
int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *drm_subdrv);

int exynos_drm_device_subdrv_probe(struct drm_device *dev);
int exynos_drm_device_subdrv_remove(struct drm_device *dev);
int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file);
void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file);

/*
 * this function registers exynos drm hdmi platform device. It ensures only one
 * instance of the device is created.
 */
int exynos_platform_device_hdmi_register(void);

/*
 * this function unregisters exynos drm hdmi platform device if it exists.
 */
void exynos_platform_device_hdmi_unregister(void);

#ifdef CONFIG_DRM_EXYNOS_IPP
int exynos_platform_device_ipp_register(void);
void exynos_platform_device_ipp_unregister(void);
#else
static inline int exynos_platform_device_ipp_register(void) { return 0; }
static inline void exynos_platform_device_ipp_unregister(void) {}
#endif


#ifdef CONFIG_DRM_EXYNOS_DPI
struct exynos_drm_display * exynos_dpi_probe(struct device *dev);
int exynos_dpi_remove(struct device *dev);
#else
static inline struct exynos_drm_display *
exynos_dpi_probe(struct device *dev) { return NULL; }
static inline int exynos_dpi_remove(struct device *dev) { return 0; }
#endif

#ifdef CONFIG_DRM_EXYNOS_VIDI
int exynos_drm_probe_vidi(void);
void exynos_drm_remove_vidi(void);
#else
static inline int exynos_drm_probe_vidi(void) { return 0; }
static inline void exynos_drm_remove_vidi(void) {}
#endif

/* This function creates a encoder and a connector, and initializes them. */
int exynos_drm_create_enc_conn(struct drm_device *dev,
				struct exynos_drm_display *display);

int exynos_drm_component_add(struct device *dev,
				enum exynos_drm_device_type dev_type,
				enum exynos_drm_output_type out_type);

void exynos_drm_component_del(struct device *dev,
				enum exynos_drm_device_type dev_type);

extern struct platform_driver fimd_driver;
extern struct platform_driver dp_driver;
extern struct platform_driver dsi_driver;
extern struct platform_driver mixer_driver;
extern struct platform_driver hdmi_driver;
extern struct platform_driver exynos_drm_common_hdmi_driver;
extern struct platform_driver vidi_driver;
extern struct platform_driver g2d_driver;
extern struct platform_driver fimc_driver;
extern struct platform_driver rotator_driver;
extern struct platform_driver gsc_driver;
extern struct platform_driver ipp_driver;
#endif
Commit	Line	Data
	1	/* exynos_drm_drv.h
	2	*
	3	* Copyright (c) 2011 Samsung Electronics Co., Ltd.
	4	* Authors:
	5	* Inki Dae <inki.dae@samsung.com>
	6	* Joonyoung Shim <jy0922.shim@samsung.com>
	7	* Seung-Woo Kim <sw0312.kim@samsung.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*/
	14
	15	#ifndef _EXYNOS_DRM_DRV_H_
	16	#define _EXYNOS_DRM_DRV_H_
	17
	18	#include <linux/module.h>
	19
	20	#define MAX_CRTC 3
	21	#define MAX_PLANE 5
	22	#define MAX_FB_BUFFER 4
	23	#define DEFAULT_ZPOS -1
	24
	25	#define _wait_for(COND, MS) ({ \
	26	unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \
	27	int ret__ = 0; \
	28	while (!(COND)) { \
	29	if (time_after(jiffies, timeout__)) { \
	30	ret__ = -ETIMEDOUT; \
	31	break; \
	32	} \
	33	} \
	34	ret__; \
	35	})
	36
	37	#define wait_for(COND, MS) _wait_for(COND, MS)
	38
	39	struct drm_device;
	40	struct drm_connector;
	41
	42	/* This enumerates device type. */
	43	enum exynos_drm_device_type {
	44	EXYNOS_DEVICE_TYPE_NONE,
	45	EXYNOS_DEVICE_TYPE_CRTC,
	46	EXYNOS_DEVICE_TYPE_CONNECTOR,
	47	};
	48
	49	/* this enumerates display type. */
	50	enum exynos_drm_output_type {
	51	EXYNOS_DISPLAY_TYPE_NONE,
	52	/* RGB or CPU Interface. */
	53	EXYNOS_DISPLAY_TYPE_LCD,
	54	/* HDMI Interface. */
	55	EXYNOS_DISPLAY_TYPE_HDMI,
	56	/* Virtual Display Interface. */
	57	EXYNOS_DISPLAY_TYPE_VIDI,
	58	};
	59
	60	/*
	61	* Exynos drm common overlay structure.
	62	*
	63	* @fb_x: offset x on a framebuffer to be displayed.
	64	* - the unit is screen coordinates.
	65	* @fb_y: offset y on a framebuffer to be displayed.
	66	* - the unit is screen coordinates.
	67	* @fb_width: width of a framebuffer.
	68	* @fb_height: height of a framebuffer.
	69	* @src_width: width of a partial image to be displayed from framebuffer.
	70	* @src_height: height of a partial image to be displayed from framebuffer.
	71	* @crtc_x: offset x on hardware screen.
	72	* @crtc_y: offset y on hardware screen.
	73	* @crtc_width: window width to be displayed (hardware screen).
	74	* @crtc_height: window height to be displayed (hardware screen).
	75	* @mode_width: width of screen mode.
	76	* @mode_height: height of screen mode.
	77	* @refresh: refresh rate.
	78	* @scan_flag: interlace or progressive way.
	79	* (it could be DRM_MODE_FLAG_*)
	80	* @bpp: pixel size.(in bit)
	81	* @pixel_format: fourcc pixel format of this overlay
	82	* @dma_addr: array of bus(accessed by dma) address to the memory region
	83	* allocated for a overlay.
	84	* @zpos: order of overlay layer(z position).
	85	* @default_win: a window to be enabled.
	86	* @color_key: color key on or off.
	87	* @index_color: if using color key feature then this value would be used
	88	* as index color.
	89	* @local_path: in case of lcd type, local path mode on or off.
	90	* @transparency: transparency on or off.
	91	* @activated: activated or not.
	92	*
	93	* this structure is common to exynos SoC and its contents would be copied
	94	* to hardware specific overlay info.
	95	*/
	96	struct exynos_drm_overlay {
	97	unsigned int fb_x;
	98	unsigned int fb_y;
	99	unsigned int fb_width;
	100	unsigned int fb_height;
	101	unsigned int src_width;
	102	unsigned int src_height;
	103	unsigned int crtc_x;
	104	unsigned int crtc_y;
	105	unsigned int crtc_width;
	106	unsigned int crtc_height;
	107	unsigned int mode_width;
	108	unsigned int mode_height;
	109	unsigned int refresh;
	110	unsigned int scan_flag;
	111	unsigned int bpp;
	112	unsigned int pitch;
	113	uint32_t pixel_format;
	114	dma_addr_t dma_addr[MAX_FB_BUFFER];
	115	int zpos;
	116
	117	bool default_win;
	118	bool color_key;
	119	unsigned int index_color;
	120	bool local_path;
	121	bool transparency;
	122	bool activated;
	123	};
	124
	125	/*
	126	* Exynos DRM Display Structure.
	127	* - this structure is common to analog tv, digital tv and lcd panel.
	128	*
	129	* @remove: cleans up the display for removal
	130	* @mode_fixup: fix mode data comparing to hw specific display mode.
	131	* @mode_set: convert drm_display_mode to hw specific display mode and
	132	* would be called by encoder->mode_set().
	133	* @check_mode: check if mode is valid or not.
	134	* @dpms: display device on or off.
	135	* @commit: apply changes to hw
	136	*/
	137	struct exynos_drm_display;
	138	struct exynos_drm_display_ops {
	139	int (create_connector)(struct exynos_drm_display display,
	140	struct drm_encoder *encoder);
	141	void (remove)(struct exynos_drm_display display);
	142	void (mode_fixup)(struct exynos_drm_display display,
	143	struct drm_connector *connector,
	144	const struct drm_display_mode *mode,
	145	struct drm_display_mode *adjusted_mode);
	146	void (mode_set)(struct exynos_drm_display display,
	147	struct drm_display_mode *mode);
	148	int (check_mode)(struct exynos_drm_display display,
	149	struct drm_display_mode *mode);
	150	void (dpms)(struct exynos_drm_display display, int mode);
	151	void (commit)(struct exynos_drm_display display);
	152	};
	153
	154	/*
	155	* Exynos drm display structure, maps 1:1 with an encoder/connector
	156	*
	157	* @list: the list entry for this manager
	158	* @type: one of EXYNOS_DISPLAY_TYPE_LCD and HDMI.
	159	* @encoder: encoder object this display maps to
	160	* @connector: connector object this display maps to
	161	* @ops: pointer to callbacks for exynos drm specific functionality
	162	* @ctx: A pointer to the display's implementation specific context
	163	*/
	164	struct exynos_drm_display {
	165	struct list_head list;
	166	enum exynos_drm_output_type type;
	167	struct drm_encoder *encoder;
	168	struct drm_connector *connector;
	169	struct exynos_drm_display_ops *ops;
	170	void *ctx;
	171	};
	172
	173	/*
	174	* Exynos drm manager ops
	175	*
	176	* @dpms: control device power.
	177	* @mode_fixup: fix mode data before applying it
	178	* @mode_set: set the given mode to the manager
	179	* @commit: set current hw specific display mode to hw.
	180	* @enable_vblank: specific driver callback for enabling vblank interrupt.
	181	* @disable_vblank: specific driver callback for disabling vblank interrupt.
	182	* @wait_for_vblank: wait for vblank interrupt to make sure that
	183	* hardware overlay is updated.
	184	* @win_mode_set: copy drm overlay info to hw specific overlay info.
	185	* @win_commit: apply hardware specific overlay data to registers.
	186	* @win_enable: enable hardware specific overlay.
	187	* @win_disable: disable hardware specific overlay.
	188	* @te_handler: trigger to transfer video image at the tearing effect
	189	* synchronization signal if there is a page flip request.
	190	*/
	191	struct exynos_drm_manager;
	192	struct exynos_drm_manager_ops {
	193	void (dpms)(struct exynos_drm_manager mgr, int mode);
	194	bool (mode_fixup)(struct exynos_drm_manager mgr,
	195	const struct drm_display_mode *mode,
	196	struct drm_display_mode *adjusted_mode);
	197	void (mode_set)(struct exynos_drm_manager mgr,
	198	const struct drm_display_mode *mode);
	199	void (commit)(struct exynos_drm_manager mgr);
	200	int (enable_vblank)(struct exynos_drm_manager mgr);
	201	void (disable_vblank)(struct exynos_drm_manager mgr);
	202	void (wait_for_vblank)(struct exynos_drm_manager mgr);
	203	void (win_mode_set)(struct exynos_drm_manager mgr,
	204	struct exynos_drm_overlay *overlay);
	205	void (win_commit)(struct exynos_drm_manager mgr, int zpos);
	206	void (win_enable)(struct exynos_drm_manager mgr, int zpos);
	207	void (win_disable)(struct exynos_drm_manager mgr, int zpos);
	208	void (te_handler)(struct exynos_drm_manager mgr);
	209	};
	210
	211	/*
	212	* Exynos drm common manager structure, maps 1:1 with a crtc
	213	*
	214	* @list: the list entry for this manager
	215	* @type: one of EXYNOS_DISPLAY_TYPE_LCD and HDMI.
	216	* @drm_dev: pointer to the drm device
	217	* @crtc: crtc object.
	218	* @pipe: the pipe number for this crtc/manager
	219	* @ops: pointer to callbacks for exynos drm specific functionality
	220	* @ctx: A pointer to the manager's implementation specific context
	221	*/
	222	struct exynos_drm_manager {
	223	struct list_head list;
	224	enum exynos_drm_output_type type;
	225	struct drm_device *drm_dev;
	226	struct drm_crtc *crtc;
	227	int pipe;
	228	struct exynos_drm_manager_ops *ops;
	229	void *ctx;
	230	};
	231
	232	struct exynos_drm_g2d_private {
	233	struct device *dev;
	234	struct list_head inuse_cmdlist;
	235	struct list_head event_list;
	236	struct list_head userptr_list;
	237	};
	238
	239	struct drm_exynos_file_private {
	240	struct exynos_drm_g2d_private *g2d_priv;
	241	struct device *ipp_dev;
	242	};
	243
	244	/*
	245	* Exynos drm private structure.
	246	*
	247	* @da_start: start address to device address space.
	248	* with iommu, device address space starts from this address
	249	* otherwise default one.
	250	* @da_space_size: size of device address space.
	251	* if 0 then default value is used for it.
	252	* @pipe: the pipe number for this crtc/manager.
	253	*/
	254	struct exynos_drm_private {
	255	struct drm_fb_helper *fb_helper;
	256
	257	/* list head for new event to be added. */
	258	struct list_head pageflip_event_list;
	259
	260	/*
	261	* created crtc object would be contained at this array and
	262	* this array is used to be aware of which crtc did it request vblank.
	263	*/
	264	struct drm_crtc *crtc[MAX_CRTC];
	265	struct drm_property *plane_zpos_property;
	266	struct drm_property *crtc_mode_property;
	267
	268	unsigned long da_start;
	269	unsigned long da_space_size;
	270
	271	unsigned int pipe;
	272	};
	273
	274	/*
	275	* Exynos drm sub driver structure.
	276	*
	277	* @list: sub driver has its own list object to register to exynos drm driver.
	278	* @dev: pointer to device object for subdrv device driver.
	279	* @drm_dev: pointer to drm_device and this pointer would be set
	280	* when sub driver calls exynos_drm_subdrv_register().
	281	* @manager: subdrv has its own manager to control a hardware appropriately
	282	* and we can access a hardware drawing on this manager.
	283	* @probe: this callback would be called by exynos drm driver after
	284	* subdrv is registered to it.
	285	* @remove: this callback is used to release resources created
	286	* by probe callback.
	287	* @open: this would be called with drm device file open.
	288	* @close: this would be called with drm device file close.
	289	*/
	290	struct exynos_drm_subdrv {
	291	struct list_head list;
	292	struct device *dev;
	293	struct drm_device *drm_dev;
	294
	295	int (probe)(struct drm_device drm_dev, struct device *dev);
	296	void (remove)(struct drm_device drm_dev, struct device *dev);
	297	int (open)(struct drm_device drm_dev, struct device *dev,
	298	struct drm_file *file);
	299	void (close)(struct drm_device drm_dev, struct device *dev,
	300	struct drm_file *file);
	301	};
	302
	303	/* This function would be called by non kms drivers such as g2d and ipp. */
	304	int exynos_drm_subdrv_register(struct exynos_drm_subdrv *drm_subdrv);
	305
	306	/* this function removes subdrv list from exynos drm driver */
	307	int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *drm_subdrv);
	308
	309	int exynos_drm_device_subdrv_probe(struct drm_device *dev);
	310	int exynos_drm_device_subdrv_remove(struct drm_device *dev);
	311	int exynos_drm_subdrv_open(struct drm_device dev, struct drm_file file);
	312	void exynos_drm_subdrv_close(struct drm_device dev, struct drm_file file);
	313
	314	/*
	315	* this function registers exynos drm hdmi platform device. It ensures only one
	316	* instance of the device is created.
	317	*/
	318	int exynos_platform_device_hdmi_register(void);
	319
	320	/*
	321	* this function unregisters exynos drm hdmi platform device if it exists.
	322	*/
	323	void exynos_platform_device_hdmi_unregister(void);
	324
	325	#ifdef CONFIG_DRM_EXYNOS_IPP
	326	int exynos_platform_device_ipp_register(void);
	327	void exynos_platform_device_ipp_unregister(void);
	328	#else
	329	static inline int exynos_platform_device_ipp_register(void) { return 0; }
	330	static inline void exynos_platform_device_ipp_unregister(void) {}
	331	#endif
	332
	333
	334	#ifdef CONFIG_DRM_EXYNOS_DPI
	335	struct exynos_drm_display * exynos_dpi_probe(struct device *dev);
	336	int exynos_dpi_remove(struct device *dev);
	337	#else
	338	static inline struct exynos_drm_display *
	339	exynos_dpi_probe(struct device *dev) { return NULL; }
	340	static inline int exynos_dpi_remove(struct device *dev) { return 0; }
	341	#endif
	342
	343	#ifdef CONFIG_DRM_EXYNOS_VIDI
	344	int exynos_drm_probe_vidi(void);
	345	void exynos_drm_remove_vidi(void);
	346	#else
	347	static inline int exynos_drm_probe_vidi(void) { return 0; }
	348	static inline void exynos_drm_remove_vidi(void) {}
	349	#endif
	350
	351	/* This function creates a encoder and a connector, and initializes them. */
	352	int exynos_drm_create_enc_conn(struct drm_device *dev,
	353	struct exynos_drm_display *display);
	354
	355	int exynos_drm_component_add(struct device *dev,
	356	enum exynos_drm_device_type dev_type,
	357	enum exynos_drm_output_type out_type);
	358
	359	void exynos_drm_component_del(struct device *dev,
	360	enum exynos_drm_device_type dev_type);
	361
	362	extern struct platform_driver fimd_driver;
	363	extern struct platform_driver dp_driver;
	364	extern struct platform_driver dsi_driver;
	365	extern struct platform_driver mixer_driver;
	366	extern struct platform_driver hdmi_driver;
	367	extern struct platform_driver exynos_drm_common_hdmi_driver;
	368	extern struct platform_driver vidi_driver;
	369	extern struct platform_driver g2d_driver;
	370	extern struct platform_driver fimc_driver;
	371	extern struct platform_driver rotator_driver;
	372	extern struct platform_driver gsc_driver;
	373	extern struct platform_driver ipp_driver;
	374	#endif