diff options
Diffstat (limited to 'include/linux/fb.h')
| -rw-r--r-- | include/linux/fb.h | 868 |
1 files changed, 868 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h new file mode 100644 index 000000000..c14576458 --- /dev/null +++ b/include/linux/fb.h @@ -0,0 +1,868 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_FB_H +#define _LINUX_FB_H + +#include <linux/refcount.h> +#include <linux/kgdb.h> +#include <uapi/linux/fb.h> + +#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user) + +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/workqueue.h> +#include <linux/notifier.h> +#include <linux/list.h> +#include <linux/backlight.h> +#include <linux/slab.h> + +#include <asm/fb.h> + +struct vm_area_struct; +struct fb_info; +struct device; +struct file; +struct videomode; +struct device_node; + +/* Definitions below are used in the parsed monitor specs */ +#define FB_DPMS_ACTIVE_OFF 1 +#define FB_DPMS_SUSPEND 2 +#define FB_DPMS_STANDBY 4 + +#define FB_DISP_DDI 1 +#define FB_DISP_ANA_700_300 2 +#define FB_DISP_ANA_714_286 4 +#define FB_DISP_ANA_1000_400 8 +#define FB_DISP_ANA_700_000 16 + +#define FB_DISP_MONO 32 +#define FB_DISP_RGB 64 +#define FB_DISP_MULTI 128 +#define FB_DISP_UNKNOWN 256 + +#define FB_SIGNAL_NONE 0 +#define FB_SIGNAL_BLANK_BLANK 1 +#define FB_SIGNAL_SEPARATE 2 +#define FB_SIGNAL_COMPOSITE 4 +#define FB_SIGNAL_SYNC_ON_GREEN 8 +#define FB_SIGNAL_SERRATION_ON 16 + +#define FB_MISC_PRIM_COLOR 1 +#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */ +#define FB_MISC_HDMI 4 +struct fb_chroma { + __u32 redx; /* in fraction of 1024 */ + __u32 greenx; + __u32 bluex; + __u32 whitex; + __u32 redy; + __u32 greeny; + __u32 bluey; + __u32 whitey; +}; + +struct fb_monspecs { + struct fb_chroma chroma; + struct fb_videomode *modedb; /* mode database */ + __u8 manufacturer[4]; /* Manufacturer */ + __u8 monitor[14]; /* Monitor String */ + __u8 serial_no[14]; /* Serial Number */ + __u8 ascii[14]; /* ? */ + __u32 modedb_len; /* mode database length */ + __u32 model; /* Monitor Model */ + __u32 serial; /* Serial Number - Integer */ + __u32 year; /* Year manufactured */ + __u32 week; /* Week Manufactured */ + __u32 hfmin; /* hfreq lower limit (Hz) */ + __u32 hfmax; /* hfreq upper limit (Hz) */ + __u32 dclkmin; /* pixelclock lower limit (Hz) */ + __u32 dclkmax; /* pixelclock upper limit (Hz) */ + __u16 input; /* display type - see FB_DISP_* */ + __u16 dpms; /* DPMS support - see FB_DPMS_ */ + __u16 signal; /* Signal Type - see FB_SIGNAL_* */ + __u16 vfmin; /* vfreq lower limit (Hz) */ + __u16 vfmax; /* vfreq upper limit (Hz) */ + __u16 gamma; /* Gamma - in fractions of 100 */ + __u16 gtf : 1; /* supports GTF */ + __u16 misc; /* Misc flags - see FB_MISC_* */ + __u8 version; /* EDID version... */ + __u8 revision; /* ...and revision */ + __u8 max_x; /* Maximum horizontal size (cm) */ + __u8 max_y; /* Maximum vertical size (cm) */ +}; + +struct fb_cmap_user { + __u32 start; /* First entry */ + __u32 len; /* Number of entries */ + __u16 __user *red; /* Red values */ + __u16 __user *green; + __u16 __user *blue; + __u16 __user *transp; /* transparency, can be NULL */ +}; + +struct fb_image_user { + __u32 dx; /* Where to place image */ + __u32 dy; + __u32 width; /* Size of image */ + __u32 height; + __u32 fg_color; /* Only used when a mono bitmap */ + __u32 bg_color; + __u8 depth; /* Depth of the image */ + const char __user *data; /* Pointer to image data */ + struct fb_cmap_user cmap; /* color map info */ +}; + +struct fb_cursor_user { + __u16 set; /* what to set */ + __u16 enable; /* cursor on/off */ + __u16 rop; /* bitop operation */ + const char __user *mask; /* cursor mask bits */ + struct fbcurpos hot; /* cursor hot spot */ + struct fb_image_user image; /* Cursor image */ +}; + +/* + * Register/unregister for framebuffer events + */ + +/* The resolution of the passed in fb_info about to change */ +#define FB_EVENT_MODE_CHANGE 0x01 + +#ifdef CONFIG_GUMSTIX_AM200EPD +/* only used by mach-pxa/am200epd.c */ +#define FB_EVENT_FB_REGISTERED 0x05 +#define FB_EVENT_FB_UNREGISTERED 0x06 +#endif + +/* A display blank is requested */ +#define FB_EVENT_BLANK 0x09 + +struct fb_event { + struct fb_info *info; + void *data; +}; + +struct fb_blit_caps { + u32 x; + u32 y; + u32 len; + u32 flags; +}; + +#ifdef CONFIG_FB_NOTIFY +extern int fb_register_client(struct notifier_block *nb); +extern int fb_unregister_client(struct notifier_block *nb); +extern int fb_notifier_call_chain(unsigned long val, void *v); +#else +static inline int fb_register_client(struct notifier_block *nb) +{ + return 0; +}; + +static inline int fb_unregister_client(struct notifier_block *nb) +{ + return 0; +}; + +static inline int fb_notifier_call_chain(unsigned long val, void *v) +{ + return 0; +}; +#endif + +/* + * Pixmap structure definition + * + * The purpose of this structure is to translate data + * from the hardware independent format of fbdev to what + * format the hardware needs. + */ + +#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ +#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ +#define FB_PIXMAP_IO 4 /* memory is iomapped */ +#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ + +struct fb_pixmap { + u8 *addr; /* pointer to memory */ + u32 size; /* size of buffer in bytes */ + u32 offset; /* current offset to buffer */ + u32 buf_align; /* byte alignment of each bitmap */ + u32 scan_align; /* alignment per scanline */ + u32 access_align; /* alignment per read/write (bits) */ + u32 flags; /* see FB_PIXMAP_* */ + u32 blit_x; /* supported bit block dimensions (1-32)*/ + u32 blit_y; /* Format: blit_x = 1 << (width - 1) */ + /* blit_y = 1 << (height - 1) */ + /* if 0, will be set to 0xffffffff (all)*/ + /* access methods */ + void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); + void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); +}; + +#ifdef CONFIG_FB_DEFERRED_IO +struct fb_deferred_io_pageref { + struct page *page; + unsigned long offset; + /* private */ + struct list_head list; +}; + +struct fb_deferred_io { + /* delay between mkwrite and deferred handler */ + unsigned long delay; + bool sort_pagereflist; /* sort pagelist by offset */ + int open_count; /* number of opened files; protected by fb_info lock */ + struct mutex lock; /* mutex that protects the pageref list */ + struct list_head pagereflist; /* list of pagerefs for touched pages */ + /* callback */ + void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); +}; +#endif + +/* + * Frame buffer operations + * + * LOCKING NOTE: those functions must _ALL_ be called with the console + * semaphore held, this is the only suitable locking mechanism we have + * in 2.6. Some may be called at interrupt time at this point though. + * + * The exception to this is the debug related hooks. Putting the fb + * into a debug state (e.g. flipping to the kernel console) and restoring + * it must be done in a lock-free manner, so low level drivers should + * keep track of the initial console (if applicable) and may need to + * perform direct, unlocked hardware writes in these hooks. + */ + +struct fb_ops { + /* open/release and usage marking */ + struct module *owner; + int (*fb_open)(struct fb_info *info, int user); + int (*fb_release)(struct fb_info *info, int user); + + /* For framebuffers with strange non linear layouts or that do not + * work with normal memory mapped access + */ + ssize_t (*fb_read)(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos); + ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos); + + /* checks var and eventually tweaks it to something supported, + * DO NOT MODIFY PAR */ + int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); + + /* set the video mode according to info->var */ + int (*fb_set_par)(struct fb_info *info); + + /* set color register */ + int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, struct fb_info *info); + + /* set color registers in batch */ + int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); + + /* blank display */ + int (*fb_blank)(int blank, struct fb_info *info); + + /* pan display */ + int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); + + /* Draws a rectangle */ + void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); + /* Copy data from area to another */ + void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); + /* Draws a image to the display */ + void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); + + /* Draws cursor */ + int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); + + /* wait for blit idle, optional */ + int (*fb_sync)(struct fb_info *info); + + /* perform fb specific ioctl (optional) */ + int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, + unsigned long arg); + + /* Handle 32bit compat ioctl (optional) */ + int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, + unsigned long arg); + + /* perform fb specific mmap */ + int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); + + /* get capability given var */ + void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, + struct fb_var_screeninfo *var); + + /* teardown any resources to do with this framebuffer */ + void (*fb_destroy)(struct fb_info *info); + + /* called at KDB enter and leave time to prepare the console */ + int (*fb_debug_enter)(struct fb_info *info); + int (*fb_debug_leave)(struct fb_info *info); +}; + +#ifdef CONFIG_FB_TILEBLITTING +#define FB_TILE_CURSOR_NONE 0 +#define FB_TILE_CURSOR_UNDERLINE 1 +#define FB_TILE_CURSOR_LOWER_THIRD 2 +#define FB_TILE_CURSOR_LOWER_HALF 3 +#define FB_TILE_CURSOR_TWO_THIRDS 4 +#define FB_TILE_CURSOR_BLOCK 5 + +struct fb_tilemap { + __u32 width; /* width of each tile in pixels */ + __u32 height; /* height of each tile in scanlines */ + __u32 depth; /* color depth of each tile */ + __u32 length; /* number of tiles in the map */ + const __u8 *data; /* actual tile map: a bitmap array, packed + to the nearest byte */ +}; + +struct fb_tilerect { + __u32 sx; /* origin in the x-axis */ + __u32 sy; /* origin in the y-axis */ + __u32 width; /* number of tiles in the x-axis */ + __u32 height; /* number of tiles in the y-axis */ + __u32 index; /* what tile to use: index to tile map */ + __u32 fg; /* foreground color */ + __u32 bg; /* background color */ + __u32 rop; /* raster operation */ +}; + +struct fb_tilearea { + __u32 sx; /* source origin in the x-axis */ + __u32 sy; /* source origin in the y-axis */ + __u32 dx; /* destination origin in the x-axis */ + __u32 dy; /* destination origin in the y-axis */ + __u32 width; /* number of tiles in the x-axis */ + __u32 height; /* number of tiles in the y-axis */ +}; + +struct fb_tileblit { + __u32 sx; /* origin in the x-axis */ + __u32 sy; /* origin in the y-axis */ + __u32 width; /* number of tiles in the x-axis */ + __u32 height; /* number of tiles in the y-axis */ + __u32 fg; /* foreground color */ + __u32 bg; /* background color */ + __u32 length; /* number of tiles to draw */ + __u32 *indices; /* array of indices to tile map */ +}; + +struct fb_tilecursor { + __u32 sx; /* cursor position in the x-axis */ + __u32 sy; /* cursor position in the y-axis */ + __u32 mode; /* 0 = erase, 1 = draw */ + __u32 shape; /* see FB_TILE_CURSOR_* */ + __u32 fg; /* foreground color */ + __u32 bg; /* background color */ +}; + +struct fb_tile_ops { + /* set tile characteristics */ + void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); + + /* all dimensions from hereon are in terms of tiles */ + + /* move a rectangular region of tiles from one area to another*/ + void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); + /* fill a rectangular region with a tile */ + void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); + /* copy an array of tiles */ + void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); + /* cursor */ + void (*fb_tilecursor)(struct fb_info *info, + struct fb_tilecursor *cursor); + /* get maximum length of the tile map */ + int (*fb_get_tilemax)(struct fb_info *info); +}; +#endif /* CONFIG_FB_TILEBLITTING */ + +/* FBINFO_* = fb_info.flags bit flags */ +#define FBINFO_HWACCEL_DISABLED 0x0002 + /* When FBINFO_HWACCEL_DISABLED is set: + * Hardware acceleration is turned off. Software implementations + * of required functions (copyarea(), fillrect(), and imageblit()) + * takes over; acceleration engine should be in a quiescent state */ + +/* hints */ +#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ +#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ +#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ + +/* hardware supported ops */ +/* semantics: when a bit is set, it indicates that the operation is + * accelerated by hardware. + * required functions will still work even if the bit is not set. + * optional functions may not even exist if the flag bit is not set. + */ +#define FBINFO_HWACCEL_NONE 0x0000 +#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ +#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ +#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ +#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ +#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ +#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ +#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ + +#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ + +/* A driver may set this flag to indicate that it does want a set_par to be + * called every time when fbcon_switch is executed. The advantage is that with + * this flag set you can really be sure that set_par is always called before + * any of the functions dependent on the correct hardware state or altering + * that state, even if you are using some broken X releases. The disadvantage + * is that it introduces unwanted delays to every console switch if set_par + * is slow. It is a good idea to try this flag in the drivers initialization + * code whenever there is a bug report related to switching between X and the + * framebuffer console. + */ +#define FBINFO_MISC_ALWAYS_SETPAR 0x40000 + +/* + * Host and GPU endianness differ. + */ +#define FBINFO_FOREIGN_ENDIAN 0x100000 +/* + * Big endian math. This is the same flags as above, but with different + * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag + * and host endianness. Drivers should not use this flag. + */ +#define FBINFO_BE_MATH 0x100000 +/* + * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM + * drivers to stop userspace from trying to share buffers behind the kernel's + * back. Instead dma-buf based buffer sharing should be used. + */ +#define FBINFO_HIDE_SMEM_START 0x200000 + + +struct fb_info { + refcount_t count; + int node; + int flags; + /* + * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows + * a lcd is not mounted upright and fbcon should rotate to compensate. + */ + int fbcon_rotate_hint; + struct mutex lock; /* Lock for open/release/ioctl funcs */ + struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */ + struct fb_var_screeninfo var; /* Current var */ + struct fb_fix_screeninfo fix; /* Current fix */ + struct fb_monspecs monspecs; /* Current Monitor specs */ + struct fb_pixmap pixmap; /* Image hardware mapper */ + struct fb_pixmap sprite; /* Cursor hardware mapper */ + struct fb_cmap cmap; /* Current cmap */ + struct list_head modelist; /* mode list */ + struct fb_videomode *mode; /* current mode */ + +#if IS_ENABLED(CONFIG_FB_BACKLIGHT) + /* assigned backlight device */ + /* set before framebuffer registration, + remove after unregister */ + struct backlight_device *bl_dev; + + /* Backlight level curve */ + struct mutex bl_curve_mutex; + u8 bl_curve[FB_BACKLIGHT_LEVELS]; +#endif +#ifdef CONFIG_FB_DEFERRED_IO + struct delayed_work deferred_work; + unsigned long npagerefs; + struct fb_deferred_io_pageref *pagerefs; + struct fb_deferred_io *fbdefio; +#endif + + const struct fb_ops *fbops; + struct device *device; /* This is the parent */ +#if defined(CONFIG_FB_DEVICE) + struct device *dev; /* This is this fb device */ +#endif + int class_flag; /* private sysfs flags */ +#ifdef CONFIG_FB_TILEBLITTING + struct fb_tile_ops *tileops; /* Tile Blitting */ +#endif + union { + char __iomem *screen_base; /* Virtual address */ + char *screen_buffer; + }; + unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ + void *pseudo_palette; /* Fake palette of 16 colors */ +#define FBINFO_STATE_RUNNING 0 +#define FBINFO_STATE_SUSPENDED 1 + u32 state; /* Hardware state i.e suspend */ + void *fbcon_par; /* fbcon use-only private area */ + /* From here on everything is device dependent */ + void *par; + + bool skip_vt_switch; /* no VT switch on suspend/resume required */ +}; + +/* This will go away + * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags + * when it wants to turn the acceleration engine on. This is + * really a separate operation, and should be modified via sysfs. + * But for now, we leave it broken with the following define + */ +#define STUPID_ACCELF_TEXT_SHIT + +#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) +#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ + (val) << (bits)) +#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ + (val) >> (bits)) + + /* + * `Generic' versions of the frame buffer device operations + */ + +extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); +extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); +extern int fb_blank(struct fb_info *info, int blank); + +/* + * Helpers for framebuffers in I/O memory + */ + +extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); +extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); +extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); +extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos); +extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos); + +#define __FB_DEFAULT_IOMEM_OPS_RDWR \ + .fb_read = fb_io_read, \ + .fb_write = fb_io_write + +#define __FB_DEFAULT_IOMEM_OPS_DRAW \ + .fb_fillrect = cfb_fillrect, \ + .fb_copyarea = cfb_copyarea, \ + .fb_imageblit = cfb_imageblit + +#define __FB_DEFAULT_IOMEM_OPS_MMAP \ + .fb_mmap = NULL /* default implementation */ + +#define FB_DEFAULT_IOMEM_OPS \ + __FB_DEFAULT_IOMEM_OPS_RDWR, \ + __FB_DEFAULT_IOMEM_OPS_DRAW, \ + __FB_DEFAULT_IOMEM_OPS_MMAP + +/* + * Helpers for framebuffers in system memory + */ + +extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); +extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); +extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); +extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos); +extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos); + +#define __FB_DEFAULT_SYSMEM_OPS_RDWR \ + .fb_read = fb_sys_read, \ + .fb_write = fb_sys_write + +#define __FB_DEFAULT_SYSMEM_OPS_DRAW \ + .fb_fillrect = sys_fillrect, \ + .fb_copyarea = sys_copyarea, \ + .fb_imageblit = sys_imageblit + +/* + * Helpers for framebuffers in DMA-able memory + */ + +#define __FB_DEFAULT_DMAMEM_OPS_RDWR \ + .fb_read = fb_sys_read, \ + .fb_write = fb_sys_write + +#define __FB_DEFAULT_DMAMEM_OPS_DRAW \ + .fb_fillrect = sys_fillrect, \ + .fb_copyarea = sys_copyarea, \ + .fb_imageblit = sys_imageblit + +/* fbmem.c */ +extern int register_framebuffer(struct fb_info *fb_info); +extern void unregister_framebuffer(struct fb_info *fb_info); +extern int fb_prepare_logo(struct fb_info *fb_info, int rotate); +extern int fb_show_logo(struct fb_info *fb_info, int rotate); +extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); +extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, + u32 height, u32 shift_high, u32 shift_low, u32 mod); +extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); +extern void fb_set_suspend(struct fb_info *info, int state); +extern int fb_get_color_depth(struct fb_var_screeninfo *var, + struct fb_fix_screeninfo *fix); +extern int fb_get_options(const char *name, char **option); +extern int fb_new_modelist(struct fb_info *info); + +extern bool fb_center_logo; +extern int fb_logo_count; + +static inline void lock_fb_info(struct fb_info *info) +{ + mutex_lock(&info->lock); +} + +static inline void unlock_fb_info(struct fb_info *info) +{ + mutex_unlock(&info->lock); +} + +static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, + u8 *src, u32 s_pitch, u32 height) +{ + u32 i, j; + + d_pitch -= s_pitch; + + for (i = height; i--; ) { + /* s_pitch is a few bytes at the most, memcpy is suboptimal */ + for (j = 0; j < s_pitch; j++) + *dst++ = *src++; + dst += d_pitch; + } +} + +/* fb_defio.c */ +int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); +extern int fb_deferred_io_init(struct fb_info *info); +extern void fb_deferred_io_open(struct fb_info *info, + struct inode *inode, + struct file *file); +extern void fb_deferred_io_release(struct fb_info *info); +extern void fb_deferred_io_cleanup(struct fb_info *info); +extern int fb_deferred_io_fsync(struct file *file, loff_t start, + loff_t end, int datasync); + +/* + * Generate callbacks for deferred I/O + */ + +#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \ + static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \ + size_t count, loff_t *ppos) \ + { \ + return fb_ ## __mode ## _read(info, buf, count, ppos); \ + } \ + static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \ + size_t count, loff_t *ppos) \ + { \ + unsigned long offset = *ppos; \ + ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \ + if (ret > 0) \ + __damage_range(info, offset, ret); \ + return ret; \ + } + +#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \ + static void __prefix ## _defio_fillrect(struct fb_info *info, \ + const struct fb_fillrect *rect) \ + { \ + __mode ## _fillrect(info, rect); \ + __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \ + } \ + static void __prefix ## _defio_copyarea(struct fb_info *info, \ + const struct fb_copyarea *area) \ + { \ + __mode ## _copyarea(info, area); \ + __damage_area(info, area->dx, area->dy, area->width, area->height); \ + } \ + static void __prefix ## _defio_imageblit(struct fb_info *info, \ + const struct fb_image *image) \ + { \ + __mode ## _imageblit(info, image); \ + __damage_area(info, image->dx, image->dy, image->width, image->height); \ + } + +#define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \ + __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \ + __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb) + +#define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \ + __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ + __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) + +/* + * Initializes struct fb_ops for deferred I/O. + */ + +#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \ + .fb_read = __prefix ## _defio_read, \ + .fb_write = __prefix ## _defio_write + +#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \ + .fb_fillrect = __prefix ## _defio_fillrect, \ + .fb_copyarea = __prefix ## _defio_copyarea, \ + .fb_imageblit = __prefix ## _defio_imageblit + +#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \ + .fb_mmap = fb_deferred_io_mmap + +#define FB_DEFAULT_DEFERRED_OPS(__prefix) \ + __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \ + __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \ + __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) + +static inline bool fb_be_math(struct fb_info *info) +{ +#ifdef CONFIG_FB_FOREIGN_ENDIAN +#if defined(CONFIG_FB_BOTH_ENDIAN) + return info->flags & FBINFO_BE_MATH; +#elif defined(CONFIG_FB_BIG_ENDIAN) + return true; +#elif defined(CONFIG_FB_LITTLE_ENDIAN) + return false; +#endif /* CONFIG_FB_BOTH_ENDIAN */ +#else +#ifdef __BIG_ENDIAN + return true; +#else + return false; +#endif /* __BIG_ENDIAN */ +#endif /* CONFIG_FB_FOREIGN_ENDIAN */ +} + +extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); +extern void framebuffer_release(struct fb_info *info); +extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); + +/* fbmon.c */ +#define FB_MAXTIMINGS 0 +#define FB_VSYNCTIMINGS 1 +#define FB_HSYNCTIMINGS 2 +#define FB_DCLKTIMINGS 3 +#define FB_IGNOREMON 0x100 + +#define FB_MODE_IS_UNKNOWN 0 +#define FB_MODE_IS_DETAILED 1 +#define FB_MODE_IS_STANDARD 2 +#define FB_MODE_IS_VESA 4 +#define FB_MODE_IS_CALCULATED 8 +#define FB_MODE_IS_FIRST 16 +#define FB_MODE_IS_FROM_VAR 32 + +extern int fbmon_dpms(const struct fb_info *fb_info); +extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, + struct fb_info *info); +extern int fb_validate_mode(const struct fb_var_screeninfo *var, + struct fb_info *info); +extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); +extern const unsigned char *fb_firmware_edid(struct device *device); +extern void fb_edid_to_monspecs(unsigned char *edid, + struct fb_monspecs *specs); +extern void fb_destroy_modedb(struct fb_videomode *modedb); +extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); +extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); + +extern int of_get_fb_videomode(struct device_node *np, + struct fb_videomode *fb, + int index); +extern int fb_videomode_from_videomode(const struct videomode *vm, + struct fb_videomode *fbmode); + +/* modedb.c */ +#define VESA_MODEDB_SIZE 43 +#define DMT_SIZE 0x50 + +extern void fb_var_to_videomode(struct fb_videomode *mode, + const struct fb_var_screeninfo *var); +extern void fb_videomode_to_var(struct fb_var_screeninfo *var, + const struct fb_videomode *mode); +extern int fb_mode_is_equal(const struct fb_videomode *mode1, + const struct fb_videomode *mode2); +extern int fb_add_videomode(const struct fb_videomode *mode, + struct list_head *head); +extern void fb_delete_videomode(const struct fb_videomode *mode, + struct list_head *head); +extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, + struct list_head *head); +extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, + struct list_head *head); +extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, + struct list_head *head); +extern void fb_destroy_modelist(struct list_head *head); +extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, + struct list_head *head); +extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, + struct list_head *head); + +/* fbcmap.c */ +extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); +extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); +extern void fb_dealloc_cmap(struct fb_cmap *cmap); +extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); +extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); +extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); +extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); +extern const struct fb_cmap *fb_default_cmap(int len); +extern void fb_invert_cmaps(void); + +struct fb_videomode { + const char *name; /* optional */ + u32 refresh; /* optional */ + u32 xres; + u32 yres; + u32 pixclock; + u32 left_margin; + u32 right_margin; + u32 upper_margin; + u32 lower_margin; + u32 hsync_len; + u32 vsync_len; + u32 sync; + u32 vmode; + u32 flag; +}; + +struct dmt_videomode { + u32 dmt_id; + u32 std_2byte_code; + u32 cvt_3byte_code; + const struct fb_videomode *mode; +}; + +extern const struct fb_videomode vesa_modes[]; +extern const struct dmt_videomode dmt_modes[]; + +struct fb_modelist { + struct list_head list; + struct fb_videomode mode; +}; + +extern int fb_find_mode(struct fb_var_screeninfo *var, + struct fb_info *info, const char *mode_option, + const struct fb_videomode *db, + unsigned int dbsize, + const struct fb_videomode *default_mode, + unsigned int default_bpp); + +#if defined(CONFIG_VIDEO_NOMODESET) +bool fb_modesetting_disabled(const char *drvname); +#else +static inline bool fb_modesetting_disabled(const char *drvname) +{ + return false; +} +#endif + +/* Convenience logging macros */ +#define fb_err(fb_info, fmt, ...) \ + pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) +#define fb_notice(info, fmt, ...) \ + pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) +#define fb_warn(fb_info, fmt, ...) \ + pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) +#define fb_info(fb_info, fmt, ...) \ + pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) +#define fb_dbg(fb_info, fmt, ...) \ + pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) + +#endif /* _LINUX_FB_H */ |