[linux.git] / include / drm / drm_fb_helper.h

/*
 * Copyright (c) 2006-2009 Red Hat Inc.
 * Copyright (c) 2006-2008 Intel Corporation
 * Copyright (c) 2007 Dave Airlie <[email protected]>
 *
 * DRM framebuffer helper functions
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 *
 * Authors:
 *      Dave Airlie <[email protected]>
 *      Jesse Barnes <[email protected]>
 */
#ifndef DRM_FB_HELPER_H
#define DRM_FB_HELPER_H

struct drm_fb_helper;

#include <linux/kgdb.h>

enum mode_set_atomic {
	LEAVE_ATOMIC_MODE_SET,
	ENTER_ATOMIC_MODE_SET,
};

struct drm_fb_offset {
	int x, y;
};

struct drm_fb_helper_crtc {
	struct drm_mode_set mode_set;
	struct drm_display_mode *desired_mode;
	int x, y;
};

/**
 * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
 * @fb_width: fbdev width
 * @fb_height: fbdev height
 * @surface_width: scanout buffer width
 * @surface_height: scanout buffer height
 * @surface_bpp: scanout buffer bpp
 * @surface_depth: scanout buffer depth
 *
 * Note that the scanout surface width/height may be larger than the fbdev
 * width/height.  In case of multiple displays, the scanout surface is sized
 * according to the largest width/height (so it is large enough for all CRTCs
 * to scanout).  But the fbdev width/height is sized to the minimum width/
 * height of all the displays.  This ensures that fbcon fits on the smallest
 * of the attached displays.
 *
 * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height,
 * rather than the surface size.
 */
struct drm_fb_helper_surface_size {
	u32 fb_width;
	u32 fb_height;
	u32 surface_width;
	u32 surface_height;
	u32 surface_bpp;
	u32 surface_depth;
};

/**
 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
 *
 * Driver callbacks used by the fbdev emulation helper library.
 */
struct drm_fb_helper_funcs {
	/**
	 * @gamma_set:
	 *
	 * Set the given gamma LUT register on the given CRTC.
	 *
	 * This callback is optional.
	 *
	 * FIXME:
	 *
	 * This callback is functionally redundant with the core gamma table
	 * support and simply exists because the fbdev hasn't yet been
	 * refactored to use the core gamma table interfaces.
	 */
	void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
			  u16 blue, int regno);
	/**
	 * @gamma_get:
	 *
	 * Read the given gamma LUT register on the given CRTC, used to save the
	 * current LUT when force-restoring the fbdev for e.g. kdbg.
	 *
	 * This callback is optional.
	 *
	 * FIXME:
	 *
	 * This callback is functionally redundant with the core gamma table
	 * support and simply exists because the fbdev hasn't yet been
	 * refactored to use the core gamma table interfaces.
	 */
	void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
			  u16 *blue, int regno);

	/**
	 * @fb_probe:
	 *
	 * Driver callback to allocate and initialize the fbdev info structure.
	 * Furthermore it also needs to allocate the DRM framebuffer used to
	 * back the fbdev.
	 *
	 * This callback is mandatory.
	 *
	 * RETURNS:
	 *
	 * The driver should return 0 on success and a negative error code on
	 * failure.
	 */
	int (*fb_probe)(struct drm_fb_helper *helper,
			struct drm_fb_helper_surface_size *sizes);

	/**
	 * @initial_config:
	 *
	 * Driver callback to setup an initial fbdev display configuration.
	 * Drivers can use this callback to tell the fbdev emulation what the
	 * preferred initial configuration is. This is useful to implement
	 * smooth booting where the fbdev (and subsequently all userspace) never
	 * changes the mode, but always inherits the existing configuration.
	 *
	 * This callback is optional.
	 *
	 * RETURNS:
	 *
	 * The driver should return true if a suitable initial configuration has
	 * been filled out and false when the fbdev helper should fall back to
	 * the default probing logic.
	 */
	bool (*initial_config)(struct drm_fb_helper *fb_helper,
			       struct drm_fb_helper_crtc **crtcs,
			       struct drm_display_mode **modes,
			       struct drm_fb_offset *offsets,
			       bool *enabled, int width, int height);
};

struct drm_fb_helper_connector {
	struct drm_connector *connector;
};

/**
 * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
 * @fb: Scanout framebuffer object
 * @dev: DRM device
 * @crtc_count: number of possible CRTCs
 * @crtc_info: per-CRTC helper state (mode, x/y offset, etc)
 * @connector_count: number of connected connectors
 * @connector_info_alloc_count: size of connector_info
 * @connector_info: array of per-connector information
 * @funcs: driver callbacks for fb helper
 * @fbdev: emulated fbdev device info struct
 * @pseudo_palette: fake palette of 16 colors
 *
 * This is the main structure used by the fbdev helpers. Drivers supporting
 * fbdev emulation should embedded this into their overall driver structure.
 * Drivers must also fill out a struct &drm_fb_helper_funcs with a few
 * operations.
 */
struct drm_fb_helper {
	struct drm_framebuffer *fb;
	struct drm_device *dev;
	int crtc_count;
	struct drm_fb_helper_crtc *crtc_info;
	int connector_count;
	int connector_info_alloc_count;
	struct drm_fb_helper_connector **connector_info;
	const struct drm_fb_helper_funcs *funcs;
	struct fb_info *fbdev;
	u32 pseudo_palette[17];

	/**
	 * @kernel_fb_list:
	 *
	 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
	 */
	struct list_head kernel_fb_list;

	/**
	 * @delayed_hotplug:
	 *
	 * A hotplug was received while fbdev wasn't in control of the DRM
	 * device, i.e. another KMS master was active. The output configuration
	 * needs to be reprobe when fbdev is in control again.
	 */
	bool delayed_hotplug;

	/**
	 * @atomic:
	 *
	 * Use atomic updates for restore_fbdev_mode(), etc.  This defaults to
	 * true if driver has DRIVER_ATOMIC feature flag, but drivers can
	 * override it to true after drm_fb_helper_init() if they support atomic
	 * modeset but do not yet advertise DRIVER_ATOMIC (note that fb-helper
	 * does not require ASYNC commits).
	 */
	bool atomic;
};

#ifdef CONFIG_DRM_FBDEV_EMULATION
int drm_fb_helper_modinit(void);
void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
			   const struct drm_fb_helper_funcs *funcs);
int drm_fb_helper_init(struct drm_device *dev,
		       struct drm_fb_helper *helper, int crtc_count,
		       int max_conn);
void drm_fb_helper_fini(struct drm_fb_helper *helper);
int drm_fb_helper_blank(int blank, struct fb_info *info);
int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
			      struct fb_info *info);
int drm_fb_helper_set_par(struct fb_info *info);
int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
			    struct fb_info *info);

int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);

struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper);
void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper);
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
			    uint32_t fb_width, uint32_t fb_height);
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
			    uint32_t depth);

void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);

ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
			       size_t count, loff_t *ppos);
ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
				size_t count, loff_t *ppos);

void drm_fb_helper_sys_fillrect(struct fb_info *info,
				const struct fb_fillrect *rect);
void drm_fb_helper_sys_copyarea(struct fb_info *info,
				const struct fb_copyarea *area);
void drm_fb_helper_sys_imageblit(struct fb_info *info,
				 const struct fb_image *image);

void drm_fb_helper_cfb_fillrect(struct fb_info *info,
				const struct fb_fillrect *rect);
void drm_fb_helper_cfb_copyarea(struct fb_info *info,
				const struct fb_copyarea *area);
void drm_fb_helper_cfb_imageblit(struct fb_info *info,
				 const struct fb_image *image);

void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state);

int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);

int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
int drm_fb_helper_debug_enter(struct fb_info *info);
int drm_fb_helper_debug_leave(struct fb_info *info);
struct drm_display_mode *
drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
			int width, int height);
struct drm_display_mode *
drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
		      int width, int height);

int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
				       struct drm_connector *connector);
#else
static inline int drm_fb_helper_modinit(void)
{
	return 0;
}

static inline void drm_fb_helper_prepare(struct drm_device *dev,
					struct drm_fb_helper *helper,
					const struct drm_fb_helper_funcs *funcs)
{
}

static inline int drm_fb_helper_init(struct drm_device *dev,
		       struct drm_fb_helper *helper, int crtc_count,
		       int max_conn)
{
	return 0;
}

static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
{
}

static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
{
	return 0;
}

static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
					    struct fb_info *info)
{
	return 0;
}

static inline int drm_fb_helper_set_par(struct fb_info *info)
{
	return 0;
}

static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
					  struct fb_info *info)
{
	return 0;
}

static inline int
drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
{
	return 0;
}

static inline struct fb_info *
drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
{
	return NULL;
}

static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
{
}
static inline void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper)
{
}

static inline void drm_fb_helper_fill_var(struct fb_info *info,
					  struct drm_fb_helper *fb_helper,
					  uint32_t fb_width, uint32_t fb_height)
{
}

static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
					  uint32_t depth)
{
}

static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
					struct fb_info *info)
{
	return 0;
}

static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
{
}

static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
					     char __user *buf, size_t count,
					     loff_t *ppos)
{
	return -ENODEV;
}

static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
					      const char __user *buf,
					      size_t count, loff_t *ppos)
{
	return -ENODEV;
}

static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
					      const struct fb_fillrect *rect)
{
}

static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
					      const struct fb_copyarea *area)
{
}

static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
					       const struct fb_image *image)
{
}

static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
					      const struct fb_fillrect *rect)
{
}

static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
					      const struct fb_copyarea *area)
{
}

static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
					       const struct fb_image *image)
{
}

static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
					     int state)
{
}

static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
{
	return 0;
}

static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
					       int bpp_sel)
{
	return 0;
}

static inline int
drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
{
	return 0;
}

static inline int drm_fb_helper_debug_enter(struct fb_info *info)
{
	return 0;
}

static inline int drm_fb_helper_debug_leave(struct fb_info *info)
{
	return 0;
}

static inline struct drm_display_mode *
drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
		       int width, int height)
{
	return NULL;
}

static inline struct drm_display_mode *
drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
		      int width, int height)
{
	return NULL;
}

static inline int
drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
				struct drm_connector *connector)
{
	return 0;
}

static inline int
drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
				   struct drm_connector *connector)
{
	return 0;
}
#endif
#endif
Commit	Line	Data
785b93ef DA	1	/*
	2	* Copyright (c) 2006-2009 Red Hat Inc.
	3	* Copyright (c) 2006-2008 Intel Corporation
	4	* Copyright (c) 2007 Dave Airlie <[email protected]>
	5	*
	6	* DRM framebuffer helper functions
	7	*
	8	* Permission to use, copy, modify, distribute, and sell this software and its
	9	* documentation for any purpose is hereby granted without fee, provided that
	10	* the above copyright notice appear in all copies and that both that copyright
	11	* notice and this permission notice appear in supporting documentation, and
	12	* that the name of the copyright holders not be used in advertising or
	13	* publicity pertaining to distribution of the software without specific,
	14	* written prior permission. The copyright holders make no representations
	15	* about the suitability of this software for any purpose. It is provided "as
	16	* is" without express or implied warranty.
	17	*
	18	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
	19	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
	20	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
	21	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
	22	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
	23	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*
	26	* Authors:
	27	* Dave Airlie <[email protected]>
	28	* Jesse Barnes <[email protected]>
	29	*/
	30	#ifndef DRM_FB_HELPER_H
	31	#define DRM_FB_HELPER_H
	32
4abe3520 DA	33	struct drm_fb_helper;
4abe3520 DA	34
1a7aba7f JB	35	#include <linux/kgdb.h>
1a7aba7f JB	36
b516a9ef SV	37	enum mode_set_atomic {
	38	LEAVE_ATOMIC_MODE_SET,
	39	ENTER_ATOMIC_MODE_SET,
	40	};
	41
b0ee9e7f DA	42	struct drm_fb_offset {
	43	int x, y;
	44	};
	45
785b93ef	46	struct drm_fb_helper_crtc {
785b93ef	47	struct drm_mode_set mode_set;
8be48d92	48	struct drm_display_mode *desired_mode;
b0ee9e7f	49	int x, y;
785b93ef DA	50	};
785b93ef DA	51
b7b5ee59 RC	52	/**
	53	* struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
	54	* @fb_width: fbdev width
	55	* @fb_height: fbdev height
	56	* @surface_width: scanout buffer width
	57	* @surface_height: scanout buffer height
	58	* @surface_bpp: scanout buffer bpp
	59	* @surface_depth: scanout buffer depth
	60	*
	61	* Note that the scanout surface width/height may be larger than the fbdev
	62	* width/height. In case of multiple displays, the scanout surface is sized
	63	* according to the largest width/height (so it is large enough for all CRTCs
	64	* to scanout). But the fbdev width/height is sized to the minimum width/
	65	* height of all the displays. This ensures that fbcon fits on the smallest
	66	* of the attached displays.
	67	*
	68	* So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height,
	69	* rather than the surface size.
	70	*/
38651674 DA	71	struct drm_fb_helper_surface_size {
	72	u32 fb_width;
	73	u32 fb_height;
	74	u32 surface_width;
	75	u32 surface_height;
	76	u32 surface_bpp;
	77	u32 surface_depth;
	78	};
	79
207fd329 SV	80	/**
207fd329 SV	81	* struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
207fd329 SV	82	*
	83	* Driver callbacks used by the fbdev emulation helper library.
	84	*/
4abe3520	85	struct drm_fb_helper_funcs {
264d6970 SV	86	/**
	87	* @gamma_set:
	88	*
	89	* Set the given gamma LUT register on the given CRTC.
	90	*
	91	* This callback is optional.
	92	*
	93	* FIXME:
	94	*
	95	* This callback is functionally redundant with the core gamma table
	96	* support and simply exists because the fbdev hasn't yet been
	97	* refactored to use the core gamma table interfaces.
	98	*/
4abe3520 DA	99	void (gamma_set)(struct drm_crtc crtc, u16 red, u16 green,
4abe3520 DA	100	u16 blue, int regno);
264d6970 SV	101	/**
	102	* @gamma_get:
	103	*
	104	* Read the given gamma LUT register on the given CRTC, used to save the
	105	* current LUT when force-restoring the fbdev for e.g. kdbg.
	106	*
	107	* This callback is optional.
	108	*
	109	* FIXME:
	110	*
	111	* This callback is functionally redundant with the core gamma table
	112	* support and simply exists because the fbdev hasn't yet been
	113	* refactored to use the core gamma table interfaces.
	114	*/
4abe3520 DA	115	void (gamma_get)(struct drm_crtc crtc, u16 red, u16 green,
	116	u16 *blue, int regno);
	117
264d6970 SV	118	/**
	119	* @fb_probe:
	120	*
	121	* Driver callback to allocate and initialize the fbdev info structure.
	122	* Furthermore it also needs to allocate the DRM framebuffer used to
	123	* back the fbdev.
	124	*
	125	* This callback is mandatory.
	126	*
	127	* RETURNS:
	128	*
	129	* The driver should return 0 on success and a negative error code on
	130	* failure.
	131	*/
4abe3520 DA	132	int (fb_probe)(struct drm_fb_helper helper,
4abe3520 DA	133	struct drm_fb_helper_surface_size *sizes);
264d6970 SV	134
	135	/**
	136	* @initial_config:
	137	*
	138	* Driver callback to setup an initial fbdev display configuration.
	139	* Drivers can use this callback to tell the fbdev emulation what the
	140	* preferred initial configuration is. This is useful to implement
	141	* smooth booting where the fbdev (and subsequently all userspace) never
	142	* changes the mode, but always inherits the existing configuration.
	143	*
	144	* This callback is optional.
	145	*
	146	* RETURNS:
	147	*
	148	* The driver should return true if a suitable initial configuration has
	149	* been filled out and false when the fbdev helper should fall back to
	150	* the default probing logic.
	151	*/
11e17a08 JB	152	bool (initial_config)(struct drm_fb_helper fb_helper,
	153	struct drm_fb_helper_crtc **crtcs,
	154	struct drm_display_mode **modes,
b0ee9e7f	155	struct drm_fb_offset *offsets,
11e17a08	156	bool *enabled, int width, int height);
4abe3520 DA	157	};
4abe3520 DA	158
d50ba256	159	struct drm_fb_helper_connector {
0b4c0f3f	160	struct drm_connector *connector;
d50ba256 DA	161	};
d50ba256 DA	162
9685cd9d	163	/**
264d6970 SV	164	* struct drm_fb_helper - main structure to emulate fbdev on top of KMS
	165	* @fb: Scanout framebuffer object
	166	* @dev: DRM device
9685cd9d RC	167	* @crtc_count: number of possible CRTCs
	168	* @crtc_info: per-CRTC helper state (mode, x/y offset, etc)
	169	* @connector_count: number of connected connectors
	170	* @connector_info_alloc_count: size of connector_info
264d6970	171	* @connector_info: array of per-connector information
9685cd9d RC	172	* @funcs: driver callbacks for fb helper
	173	* @fbdev: emulated fbdev device info struct
	174	* @pseudo_palette: fake palette of 16 colors
264d6970 SV	175	*
	176	* This is the main structure used by the fbdev helpers. Drivers supporting
	177	* fbdev emulation should embedded this into their overall driver structure.
	178	* Drivers must also fill out a struct &drm_fb_helper_funcs with a few
	179	* operations.
9685cd9d	180	*/
785b93ef DA	181	struct drm_fb_helper {
	182	struct drm_framebuffer *fb;
	183	struct drm_device *dev;
785b93ef DA	184	int crtc_count;
785b93ef DA	185	struct drm_fb_helper_crtc *crtc_info;
0b4c0f3f	186	int connector_count;
65c2a89c	187	int connector_info_alloc_count;
0b4c0f3f	188	struct drm_fb_helper_connector **connector_info;
3a493879	189	const struct drm_fb_helper_funcs *funcs;
38651674 DA	190	struct fb_info *fbdev;
38651674 DA	191	u32 pseudo_palette[17];
264d6970 SV	192
	193	/**
	194	* @kernel_fb_list:
	195	*
	196	* Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
	197	*/
785b93ef	198	struct list_head kernel_fb_list;
8be48d92	199
264d6970 SV	200	/**
	201	* @delayed_hotplug:
	202	*
	203	* A hotplug was received while fbdev wasn't in control of the DRM
	204	* device, i.e. another KMS master was active. The output configuration
	205	* needs to be reprobe when fbdev is in control again.
	206	*/
4abe3520	207	bool delayed_hotplug;
bbb1e524 RC	208
	209	/**
	210	* @atomic:
	211	*
	212	* Use atomic updates for restore_fbdev_mode(), etc. This defaults to
	213	* true if driver has DRIVER_ATOMIC feature flag, but drivers can
	214	* override it to true after drm_fb_helper_init() if they support atomic
	215	* modeset but do not yet advertise DRIVER_ATOMIC (note that fb-helper
	216	* does not require ASYNC commits).
	217	*/
	218	bool atomic;
785b93ef DA	219	};
785b93ef DA	220
a03fdcb1	221	#ifdef CONFIG_DRM_FBDEV_EMULATION
70412cfa	222	int drm_fb_helper_modinit(void);
10a23102 TR	223	void drm_fb_helper_prepare(struct drm_device dev, struct drm_fb_helper helper,
10a23102 TR	224	const struct drm_fb_helper_funcs *funcs);
4abe3520 DA	225	int drm_fb_helper_init(struct drm_device *dev,
4abe3520 DA	226	struct drm_fb_helper *helper, int crtc_count,
eb1f8e4f	227	int max_conn);
4abe3520	228	void drm_fb_helper_fini(struct drm_fb_helper *helper);
785b93ef DA	229	int drm_fb_helper_blank(int blank, struct fb_info *info);
	230	int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
	231	struct fb_info *info);
	232	int drm_fb_helper_set_par(struct fb_info *info);
	233	int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
	234	struct fb_info *info);
785b93ef	235
b7bdf0a8	236	int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
b8017d6c AT	237
	238	struct fb_info drm_fb_helper_alloc_fbi(struct drm_fb_helper fb_helper);
	239	void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
	240	void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper);
38651674	241	void drm_fb_helper_fill_var(struct fb_info info, struct drm_fb_helper fb_helper,
785b93ef	242	uint32_t fb_width, uint32_t fb_height);
3632ef89 DA	243	void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
	244	uint32_t depth);
	245
47074ab7 AT	246	void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
47074ab7 AT	247
cbb1a82e AT	248	ssize_t drm_fb_helper_sys_read(struct fb_info info, char __user buf,
	249	size_t count, loff_t *ppos);
	250	ssize_t drm_fb_helper_sys_write(struct fb_info info, const char __user buf,
	251	size_t count, loff_t *ppos);
	252
742547b7 AT	253	void drm_fb_helper_sys_fillrect(struct fb_info *info,
	254	const struct fb_fillrect *rect);
	255	void drm_fb_helper_sys_copyarea(struct fb_info *info,
	256	const struct fb_copyarea *area);
	257	void drm_fb_helper_sys_imageblit(struct fb_info *info,
	258	const struct fb_image *image);
	259
	260	void drm_fb_helper_cfb_fillrect(struct fb_info *info,
	261	const struct fb_fillrect *rect);
	262	void drm_fb_helper_cfb_copyarea(struct fb_info *info,
	263	const struct fb_copyarea *area);
	264	void drm_fb_helper_cfb_imageblit(struct fb_info *info,
	265	const struct fb_image *image);
	266
fdefa58a AT	267	void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state);
fdefa58a AT	268
068143d3	269	int drm_fb_helper_setcmap(struct fb_cmap cmap, struct fb_info info);
d50ba256	270
7394371d	271	int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
01934c2a	272	int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
0b4c0f3f	273	int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
1a7aba7f JB	274	int drm_fb_helper_debug_enter(struct fb_info *info);
1a7aba7f JB	275	int drm_fb_helper_debug_leave(struct fb_info *info);
2f1046f3 JB	276	struct drm_display_mode *
	277	drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
	278	int width, int height);
	279	struct drm_display_mode *
	280	drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
	281	int width, int height);
8be48d92	282
65c2a89c DA	283	int drm_fb_helper_add_one_connector(struct drm_fb_helper fb_helper, struct drm_connector connector);
	284	int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
	285	struct drm_connector *connector);
a03fdcb1	286	#else
70412cfa RA	287	static inline int drm_fb_helper_modinit(void)
	288	{
	289	return 0;
	290	}
	291
a03fdcb1 AT	292	static inline void drm_fb_helper_prepare(struct drm_device *dev,
	293	struct drm_fb_helper *helper,
	294	const struct drm_fb_helper_funcs *funcs)
	295	{
	296	}
	297
	298	static inline int drm_fb_helper_init(struct drm_device *dev,
	299	struct drm_fb_helper *helper, int crtc_count,
	300	int max_conn)
	301	{
	302	return 0;
	303	}
	304
	305	static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
	306	{
	307	}
	308
	309	static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
	310	{
	311	return 0;
	312	}
	313
	314	static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
	315	struct fb_info *info)
	316	{
	317	return 0;
	318	}
	319
	320	static inline int drm_fb_helper_set_par(struct fb_info *info)
	321	{
	322	return 0;
	323	}
	324
	325	static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
	326	struct fb_info *info)
	327	{
	328	return 0;
	329	}
	330
b7bdf0a8	331	static inline int
a03fdcb1 AT	332	drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
a03fdcb1 AT	333	{
b7bdf0a8	334	return 0;
a03fdcb1 AT	335	}
	336
	337	static inline struct fb_info *
	338	drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
	339	{
	340	return NULL;
	341	}
	342
	343	static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
	344	{
	345	}
	346	static inline void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper)
	347	{
	348	}
	349
	350	static inline void drm_fb_helper_fill_var(struct fb_info *info,
	351	struct drm_fb_helper *fb_helper,
	352	uint32_t fb_width, uint32_t fb_height)
	353	{
	354	}
	355
	356	static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
	357	uint32_t depth)
	358	{
	359	}
	360
	361	static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
	362	struct fb_info *info)
	363	{
	364	return 0;
	365	}
	366
	367	static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
	368	{
	369	}
	370
	371	static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
	372	char __user *buf, size_t count,
	373	loff_t *ppos)
	374	{
	375	return -ENODEV;
	376	}
	377
	378	static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
	379	const char __user *buf,
	380	size_t count, loff_t *ppos)
	381	{
	382	return -ENODEV;
	383	}
	384
	385	static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
	386	const struct fb_fillrect *rect)
	387	{
	388	}
	389
	390	static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
	391	const struct fb_copyarea *area)
	392	{
	393	}
	394
	395	static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
	396	const struct fb_image *image)
	397	{
	398	}
399
400	static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
401	const struct fb_fillrect *rect)
402	{
403	}
404
405	static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
406	const struct fb_copyarea *area)
407	{
408	}
409
410	static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
411	const struct fb_image *image)
412	{
413	}
414
415	static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
416	int state)
417	{
418	}
419
420	static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
421	{
422	return 0;
423	}
424
425	static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
426	int bpp_sel)
427	{
428	return 0;
429	}
430
431	static inline int
432	drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
433	{
434	return 0;
435	}
436
437	static inline int drm_fb_helper_debug_enter(struct fb_info *info)
438	{
439	return 0;
440	}
441
442	static inline int drm_fb_helper_debug_leave(struct fb_info *info)
443	{
444	return 0;
445	}
446
447	static inline struct drm_display_mode *
448	drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
449	int width, int height)
450	{
451	return NULL;
452	}
453
454	static inline struct drm_display_mode *
455	drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
456	int width, int height)
457	{
458	return NULL;
459	}
460
461	static inline int
462	drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
463	struct drm_connector *connector)
464	{
465	return 0;
466	}
467
468	static inline int
469	drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
470	struct drm_connector *connector)
471	{
472	return 0;
473	}
474	#endif
785b93ef	475	#endif