1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/kgdb.h>
6 #include <uapi/linux/fb.h>
8 #define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
11 #include <linux/init.h>
12 #include <linux/workqueue.h>
13 #include <linux/notifier.h>
14 #include <linux/list.h>
15 #include <linux/backlight.h>
16 #include <linux/slab.h>
19 struct vm_area_struct;
26 /* Definitions below are used in the parsed monitor specs */
27 #define FB_DPMS_ACTIVE_OFF 1
28 #define FB_DPMS_SUSPEND 2
29 #define FB_DPMS_STANDBY 4
32 #define FB_DISP_ANA_700_300 2
33 #define FB_DISP_ANA_714_286 4
34 #define FB_DISP_ANA_1000_400 8
35 #define FB_DISP_ANA_700_000 16
37 #define FB_DISP_MONO 32
38 #define FB_DISP_RGB 64
39 #define FB_DISP_MULTI 128
40 #define FB_DISP_UNKNOWN 256
42 #define FB_SIGNAL_NONE 0
43 #define FB_SIGNAL_BLANK_BLANK 1
44 #define FB_SIGNAL_SEPARATE 2
45 #define FB_SIGNAL_COMPOSITE 4
46 #define FB_SIGNAL_SYNC_ON_GREEN 8
47 #define FB_SIGNAL_SERRATION_ON 16
49 #define FB_MISC_PRIM_COLOR 1
50 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
51 #define FB_MISC_HDMI 4
53 __u32 redx; /* in fraction of 1024 */
64 struct fb_chroma chroma;
65 struct fb_videomode *modedb; /* mode database */
66 __u8 manufacturer[4]; /* Manufacturer */
67 __u8 monitor[14]; /* Monitor String */
68 __u8 serial_no[14]; /* Serial Number */
69 __u8 ascii[14]; /* ? */
70 __u32 modedb_len; /* mode database length */
71 __u32 model; /* Monitor Model */
72 __u32 serial; /* Serial Number - Integer */
73 __u32 year; /* Year manufactured */
74 __u32 week; /* Week Manufactured */
75 __u32 hfmin; /* hfreq lower limit (Hz) */
76 __u32 hfmax; /* hfreq upper limit (Hz) */
77 __u32 dclkmin; /* pixelclock lower limit (Hz) */
78 __u32 dclkmax; /* pixelclock upper limit (Hz) */
79 __u16 input; /* display type - see FB_DISP_* */
80 __u16 dpms; /* DPMS support - see FB_DPMS_ */
81 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
82 __u16 vfmin; /* vfreq lower limit (Hz) */
83 __u16 vfmax; /* vfreq upper limit (Hz) */
84 __u16 gamma; /* Gamma - in fractions of 100 */
85 __u16 gtf : 1; /* supports GTF */
86 __u16 misc; /* Misc flags - see FB_MISC_* */
87 __u8 version; /* EDID version... */
88 __u8 revision; /* ...and revision */
89 __u8 max_x; /* Maximum horizontal size (cm) */
90 __u8 max_y; /* Maximum vertical size (cm) */
94 __u32 start; /* First entry */
95 __u32 len; /* Number of entries */
96 __u16 __user *red; /* Red values */
99 __u16 __user *transp; /* transparency, can be NULL */
102 struct fb_image_user {
103 __u32 dx; /* Where to place image */
105 __u32 width; /* Size of image */
107 __u32 fg_color; /* Only used when a mono bitmap */
109 __u8 depth; /* Depth of the image */
110 const char __user *data; /* Pointer to image data */
111 struct fb_cmap_user cmap; /* color map info */
114 struct fb_cursor_user {
115 __u16 set; /* what to set */
116 __u16 enable; /* cursor on/off */
117 __u16 rop; /* bitop operation */
118 const char __user *mask; /* cursor mask bits */
119 struct fbcurpos hot; /* cursor hot spot */
120 struct fb_image_user image; /* Cursor image */
124 * Register/unregister for framebuffer events
127 /* The resolution of the passed in fb_info about to change */
128 #define FB_EVENT_MODE_CHANGE 0x01
129 /* The display on this fb_info is being suspended, no access to the
130 * framebuffer is allowed any more after that call returns
132 #define FB_EVENT_SUSPEND 0x02
133 /* The display on this fb_info was resumed, you can restore the display
136 #define FB_EVENT_RESUME 0x03
137 /* An entry from the modelist was removed */
138 #define FB_EVENT_MODE_DELETE 0x04
140 #ifdef CONFIG_GUMSTIX_AM200EPD
141 /* only used by mach-pxa/am200epd.c */
142 #define FB_EVENT_FB_REGISTERED 0x05
143 #define FB_EVENT_FB_UNREGISTERED 0x06
146 /* CONSOLE-SPECIFIC: get console to framebuffer mapping */
147 #define FB_EVENT_GET_CONSOLE_MAP 0x07
148 /* CONSOLE-SPECIFIC: set console to framebuffer mapping */
149 #define FB_EVENT_SET_CONSOLE_MAP 0x08
150 /* A hardware display blank change occurred */
151 #define FB_EVENT_BLANK 0x09
152 /* Private modelist is to be replaced */
153 #define FB_EVENT_NEW_MODELIST 0x0A
154 /* The resolution of the passed in fb_info about to change and
155 all vc's should be changed */
156 #define FB_EVENT_MODE_CHANGE_ALL 0x0B
157 /* A software display blank change occurred */
158 #define FB_EVENT_CONBLANK 0x0C
159 /* Get drawing requirements */
160 #define FB_EVENT_GET_REQ 0x0D
161 /* CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
162 #define FB_EVENT_REMAP_ALL_CONSOLE 0x0F
163 /* A hardware display blank early change occurred */
164 #define FB_EARLY_EVENT_BLANK 0x10
165 /* A hardware display blank revert early change occurred */
166 #define FB_R_EARLY_EVENT_BLANK 0x11
169 struct fb_info *info;
173 struct fb_blit_caps {
180 #ifdef CONFIG_FB_NOTIFY
181 extern int fb_register_client(struct notifier_block *nb);
182 extern int fb_unregister_client(struct notifier_block *nb);
183 extern int fb_notifier_call_chain(unsigned long val, void *v);
185 static inline int fb_register_client(struct notifier_block *nb)
190 static inline int fb_unregister_client(struct notifier_block *nb)
195 static inline int fb_notifier_call_chain(unsigned long val, void *v)
202 * Pixmap structure definition
204 * The purpose of this structure is to translate data
205 * from the hardware independent format of fbdev to what
206 * format the hardware needs.
209 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
210 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
211 #define FB_PIXMAP_IO 4 /* memory is iomapped */
212 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
215 u8 *addr; /* pointer to memory */
216 u32 size; /* size of buffer in bytes */
217 u32 offset; /* current offset to buffer */
218 u32 buf_align; /* byte alignment of each bitmap */
219 u32 scan_align; /* alignment per scanline */
220 u32 access_align; /* alignment per read/write (bits) */
221 u32 flags; /* see FB_PIXMAP_* */
222 u32 blit_x; /* supported bit block dimensions (1-32)*/
223 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
224 /* blit_y = 1 << (height - 1) */
225 /* if 0, will be set to 0xffffffff (all)*/
227 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
228 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
231 #ifdef CONFIG_FB_DEFERRED_IO
232 struct fb_deferred_io {
233 /* delay between mkwrite and deferred handler */
235 struct mutex lock; /* mutex that protects the page list */
236 struct list_head pagelist; /* list of touched pages */
238 void (*first_io)(struct fb_info *info);
239 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
244 * Frame buffer operations
246 * LOCKING NOTE: those functions must _ALL_ be called with the console
247 * semaphore held, this is the only suitable locking mechanism we have
248 * in 2.6. Some may be called at interrupt time at this point though.
250 * The exception to this is the debug related hooks. Putting the fb
251 * into a debug state (e.g. flipping to the kernel console) and restoring
252 * it must be done in a lock-free manner, so low level drivers should
253 * keep track of the initial console (if applicable) and may need to
254 * perform direct, unlocked hardware writes in these hooks.
258 /* open/release and usage marking */
259 struct module *owner;
260 int (*fb_open)(struct fb_info *info, int user);
261 int (*fb_release)(struct fb_info *info, int user);
263 /* For framebuffers with strange non linear layouts or that do not
264 * work with normal memory mapped access
266 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
267 size_t count, loff_t *ppos);
268 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
269 size_t count, loff_t *ppos);
271 /* checks var and eventually tweaks it to something supported,
272 * DO NOT MODIFY PAR */
273 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
275 /* set the video mode according to info->var */
276 int (*fb_set_par)(struct fb_info *info);
278 /* set color register */
279 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
280 unsigned blue, unsigned transp, struct fb_info *info);
282 /* set color registers in batch */
283 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
286 int (*fb_blank)(int blank, struct fb_info *info);
289 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
291 /* Draws a rectangle */
292 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
293 /* Copy data from area to another */
294 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
295 /* Draws a image to the display */
296 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
299 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
301 /* wait for blit idle, optional */
302 int (*fb_sync)(struct fb_info *info);
304 /* perform fb specific ioctl (optional) */
305 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
308 /* Handle 32bit compat ioctl (optional) */
309 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
312 /* perform fb specific mmap */
313 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
315 /* get capability given var */
316 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
317 struct fb_var_screeninfo *var);
319 /* teardown any resources to do with this framebuffer */
320 void (*fb_destroy)(struct fb_info *info);
322 /* called at KDB enter and leave time to prepare the console */
323 int (*fb_debug_enter)(struct fb_info *info);
324 int (*fb_debug_leave)(struct fb_info *info);
327 #ifdef CONFIG_FB_TILEBLITTING
328 #define FB_TILE_CURSOR_NONE 0
329 #define FB_TILE_CURSOR_UNDERLINE 1
330 #define FB_TILE_CURSOR_LOWER_THIRD 2
331 #define FB_TILE_CURSOR_LOWER_HALF 3
332 #define FB_TILE_CURSOR_TWO_THIRDS 4
333 #define FB_TILE_CURSOR_BLOCK 5
336 __u32 width; /* width of each tile in pixels */
337 __u32 height; /* height of each tile in scanlines */
338 __u32 depth; /* color depth of each tile */
339 __u32 length; /* number of tiles in the map */
340 const __u8 *data; /* actual tile map: a bitmap array, packed
341 to the nearest byte */
345 __u32 sx; /* origin in the x-axis */
346 __u32 sy; /* origin in the y-axis */
347 __u32 width; /* number of tiles in the x-axis */
348 __u32 height; /* number of tiles in the y-axis */
349 __u32 index; /* what tile to use: index to tile map */
350 __u32 fg; /* foreground color */
351 __u32 bg; /* background color */
352 __u32 rop; /* raster operation */
356 __u32 sx; /* source origin in the x-axis */
357 __u32 sy; /* source origin in the y-axis */
358 __u32 dx; /* destination origin in the x-axis */
359 __u32 dy; /* destination origin in the y-axis */
360 __u32 width; /* number of tiles in the x-axis */
361 __u32 height; /* number of tiles in the y-axis */
365 __u32 sx; /* origin in the x-axis */
366 __u32 sy; /* origin in the y-axis */
367 __u32 width; /* number of tiles in the x-axis */
368 __u32 height; /* number of tiles in the y-axis */
369 __u32 fg; /* foreground color */
370 __u32 bg; /* background color */
371 __u32 length; /* number of tiles to draw */
372 __u32 *indices; /* array of indices to tile map */
375 struct fb_tilecursor {
376 __u32 sx; /* cursor position in the x-axis */
377 __u32 sy; /* cursor position in the y-axis */
378 __u32 mode; /* 0 = erase, 1 = draw */
379 __u32 shape; /* see FB_TILE_CURSOR_* */
380 __u32 fg; /* foreground color */
381 __u32 bg; /* background color */
385 /* set tile characteristics */
386 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
388 /* all dimensions from hereon are in terms of tiles */
390 /* move a rectangular region of tiles from one area to another*/
391 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
392 /* fill a rectangular region with a tile */
393 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
394 /* copy an array of tiles */
395 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
397 void (*fb_tilecursor)(struct fb_info *info,
398 struct fb_tilecursor *cursor);
399 /* get maximum length of the tile map */
400 int (*fb_get_tilemax)(struct fb_info *info);
402 #endif /* CONFIG_FB_TILEBLITTING */
404 /* FBINFO_* = fb_info.flags bit flags */
405 #define FBINFO_DEFAULT 0
406 #define FBINFO_HWACCEL_DISABLED 0x0002
407 /* When FBINFO_HWACCEL_DISABLED is set:
408 * Hardware acceleration is turned off. Software implementations
409 * of required functions (copyarea(), fillrect(), and imageblit())
410 * takes over; acceleration engine should be in a quiescent state */
413 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
414 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
415 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
417 /* hardware supported ops */
418 /* semantics: when a bit is set, it indicates that the operation is
419 * accelerated by hardware.
420 * required functions will still work even if the bit is not set.
421 * optional functions may not even exist if the flag bit is not set.
423 #define FBINFO_HWACCEL_NONE 0x0000
424 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
425 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
426 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
427 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
428 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
429 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
430 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
432 #define FBINFO_MISC_USEREVENT 0x10000 /* event request
434 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
436 /* A driver may set this flag to indicate that it does want a set_par to be
437 * called every time when fbcon_switch is executed. The advantage is that with
438 * this flag set you can really be sure that set_par is always called before
439 * any of the functions dependent on the correct hardware state or altering
440 * that state, even if you are using some broken X releases. The disadvantage
441 * is that it introduces unwanted delays to every console switch if set_par
442 * is slow. It is a good idea to try this flag in the drivers initialization
443 * code whenever there is a bug report related to switching between X and the
444 * framebuffer console.
446 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000
448 /* where the fb is a firmware driver, and can be replaced with a proper one */
449 #define FBINFO_MISC_FIRMWARE 0x80000
451 * Host and GPU endianness differ.
453 #define FBINFO_FOREIGN_ENDIAN 0x100000
455 * Big endian math. This is the same flags as above, but with different
456 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
457 * and host endianness. Drivers should not use this flag.
459 #define FBINFO_BE_MATH 0x100000
461 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
462 * drivers to stop userspace from trying to share buffers behind the kernel's
463 * back. Instead dma-buf based buffer sharing should be used.
465 #define FBINFO_HIDE_SMEM_START 0x200000
473 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
474 * a lcd is not mounted upright and fbcon should rotate to compensate.
476 int fbcon_rotate_hint;
477 struct mutex lock; /* Lock for open/release/ioctl funcs */
478 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
479 struct fb_var_screeninfo var; /* Current var */
480 struct fb_fix_screeninfo fix; /* Current fix */
481 struct fb_monspecs monspecs; /* Current Monitor specs */
482 struct work_struct queue; /* Framebuffer event queue */
483 struct fb_pixmap pixmap; /* Image hardware mapper */
484 struct fb_pixmap sprite; /* Cursor hardware mapper */
485 struct fb_cmap cmap; /* Current cmap */
486 struct list_head modelist; /* mode list */
487 struct fb_videomode *mode; /* current mode */
489 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
490 /* assigned backlight device */
491 /* set before framebuffer registration,
492 remove after unregister */
493 struct backlight_device *bl_dev;
495 /* Backlight level curve */
496 struct mutex bl_curve_mutex;
497 u8 bl_curve[FB_BACKLIGHT_LEVELS];
499 #ifdef CONFIG_FB_DEFERRED_IO
500 struct delayed_work deferred_work;
501 struct fb_deferred_io *fbdefio;
504 struct fb_ops *fbops;
505 struct device *device; /* This is the parent */
506 struct device *dev; /* This is this fb device */
507 int class_flag; /* private sysfs flags */
508 #ifdef CONFIG_FB_TILEBLITTING
509 struct fb_tile_ops *tileops; /* Tile Blitting */
512 char __iomem *screen_base; /* Virtual address */
515 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
516 void *pseudo_palette; /* Fake palette of 16 colors */
517 #define FBINFO_STATE_RUNNING 0
518 #define FBINFO_STATE_SUSPENDED 1
519 u32 state; /* Hardware state i.e suspend */
520 void *fbcon_par; /* fbcon use-only private area */
521 /* From here on everything is device dependent */
523 /* we need the PCI or similar aperture base/size not
524 smem_start/size as smem_start may just be an object
525 allocated inside the aperture so may not actually overlap */
526 struct apertures_struct {
529 resource_size_t base;
530 resource_size_t size;
534 bool skip_vt_switch; /* no VT switch on suspend/resume required */
537 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
538 struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
539 + max_num * sizeof(struct aperture), GFP_KERNEL);
546 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
549 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
550 * when it wants to turn the acceleration engine on. This is
551 * really a separate operation, and should be modified via sysfs.
552 * But for now, we leave it broken with the following define
554 #define STUPID_ACCELF_TEXT_SHIT
557 #if defined(__sparc__)
559 /* We map all of our framebuffers such that big-endian accesses
560 * are what we want, so the following is sufficient.
564 #define fb_readb sbus_readb
565 #define fb_readw sbus_readw
566 #define fb_readl sbus_readl
567 #define fb_readq sbus_readq
568 #define fb_writeb sbus_writeb
569 #define fb_writew sbus_writew
570 #define fb_writel sbus_writel
571 #define fb_writeq sbus_writeq
572 #define fb_memset sbus_memset_io
573 #define fb_memcpy_fromfb sbus_memcpy_fromio
574 #define fb_memcpy_tofb sbus_memcpy_toio
576 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
577 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
578 defined(__arm__) || defined(__aarch64__)
580 #define fb_readb __raw_readb
581 #define fb_readw __raw_readw
582 #define fb_readl __raw_readl
583 #define fb_readq __raw_readq
584 #define fb_writeb __raw_writeb
585 #define fb_writew __raw_writew
586 #define fb_writel __raw_writel
587 #define fb_writeq __raw_writeq
588 #define fb_memset memset_io
589 #define fb_memcpy_fromfb memcpy_fromio
590 #define fb_memcpy_tofb memcpy_toio
594 #define fb_readb(addr) (*(volatile u8 *) (addr))
595 #define fb_readw(addr) (*(volatile u16 *) (addr))
596 #define fb_readl(addr) (*(volatile u32 *) (addr))
597 #define fb_readq(addr) (*(volatile u64 *) (addr))
598 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
599 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
600 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
601 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
602 #define fb_memset memset
603 #define fb_memcpy_fromfb memcpy
604 #define fb_memcpy_tofb memcpy
608 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
609 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
611 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
615 * `Generic' versions of the frame buffer device operations
618 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
619 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
620 extern int fb_blank(struct fb_info *info, int blank);
621 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
622 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
623 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
625 * Drawing operations where framebuffer is in system RAM
627 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
628 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
629 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
630 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
631 size_t count, loff_t *ppos);
632 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
633 size_t count, loff_t *ppos);
635 /* drivers/video/fbmem.c */
636 extern int register_framebuffer(struct fb_info *fb_info);
637 extern int unregister_framebuffer(struct fb_info *fb_info);
638 extern int unlink_framebuffer(struct fb_info *fb_info);
639 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id,
641 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
642 const char *name, bool primary);
643 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
644 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
645 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
646 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
647 u32 height, u32 shift_high, u32 shift_low, u32 mod);
648 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
649 extern void fb_set_suspend(struct fb_info *info, int state);
650 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
651 struct fb_fix_screeninfo *fix);
652 extern int fb_get_options(const char *name, char **option);
653 extern int fb_new_modelist(struct fb_info *info);
655 extern struct fb_info *registered_fb[FB_MAX];
656 extern int num_registered_fb;
657 extern bool fb_center_logo;
658 extern struct class *fb_class;
660 #define for_each_registered_fb(i) \
661 for (i = 0; i < FB_MAX; i++) \
662 if (!registered_fb[i]) {} else
664 static inline void lock_fb_info(struct fb_info *info)
666 mutex_lock(&info->lock);
669 static inline void unlock_fb_info(struct fb_info *info)
671 mutex_unlock(&info->lock);
674 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
675 u8 *src, u32 s_pitch, u32 height)
681 for (i = height; i--; ) {
682 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
683 for (j = 0; j < s_pitch; j++)
689 /* drivers/video/fb_defio.c */
690 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
691 extern void fb_deferred_io_init(struct fb_info *info);
692 extern void fb_deferred_io_open(struct fb_info *info,
695 extern void fb_deferred_io_cleanup(struct fb_info *info);
696 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
697 loff_t end, int datasync);
699 static inline bool fb_be_math(struct fb_info *info)
701 #ifdef CONFIG_FB_FOREIGN_ENDIAN
702 #if defined(CONFIG_FB_BOTH_ENDIAN)
703 return info->flags & FBINFO_BE_MATH;
704 #elif defined(CONFIG_FB_BIG_ENDIAN)
706 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
708 #endif /* CONFIG_FB_BOTH_ENDIAN */
714 #endif /* __BIG_ENDIAN */
715 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
718 /* drivers/video/fbsysfs.c */
719 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
720 extern void framebuffer_release(struct fb_info *info);
721 extern int fb_init_device(struct fb_info *fb_info);
722 extern void fb_cleanup_device(struct fb_info *head);
723 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
725 /* drivers/video/fbmon.c */
726 #define FB_MAXTIMINGS 0
727 #define FB_VSYNCTIMINGS 1
728 #define FB_HSYNCTIMINGS 2
729 #define FB_DCLKTIMINGS 3
730 #define FB_IGNOREMON 0x100
732 #define FB_MODE_IS_UNKNOWN 0
733 #define FB_MODE_IS_DETAILED 1
734 #define FB_MODE_IS_STANDARD 2
735 #define FB_MODE_IS_VESA 4
736 #define FB_MODE_IS_CALCULATED 8
737 #define FB_MODE_IS_FIRST 16
738 #define FB_MODE_IS_FROM_VAR 32
740 extern int fbmon_dpms(const struct fb_info *fb_info);
741 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
742 struct fb_info *info);
743 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
744 struct fb_info *info);
745 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
746 extern const unsigned char *fb_firmware_edid(struct device *device);
747 extern void fb_edid_to_monspecs(unsigned char *edid,
748 struct fb_monspecs *specs);
749 extern void fb_edid_add_monspecs(unsigned char *edid,
750 struct fb_monspecs *specs);
751 extern void fb_destroy_modedb(struct fb_videomode *modedb);
752 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
753 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
755 extern int of_get_fb_videomode(struct device_node *np,
756 struct fb_videomode *fb,
758 extern int fb_videomode_from_videomode(const struct videomode *vm,
759 struct fb_videomode *fbmode);
761 /* drivers/video/modedb.c */
762 #define VESA_MODEDB_SIZE 43
763 #define DMT_SIZE 0x50
765 extern void fb_var_to_videomode(struct fb_videomode *mode,
766 const struct fb_var_screeninfo *var);
767 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
768 const struct fb_videomode *mode);
769 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
770 const struct fb_videomode *mode2);
771 extern int fb_add_videomode(const struct fb_videomode *mode,
772 struct list_head *head);
773 extern void fb_delete_videomode(const struct fb_videomode *mode,
774 struct list_head *head);
775 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
776 struct list_head *head);
777 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
778 struct list_head *head);
779 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
780 struct list_head *head);
781 extern void fb_destroy_modelist(struct list_head *head);
782 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
783 struct list_head *head);
784 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
785 struct list_head *head);
787 /* drivers/video/fbcmap.c */
788 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
789 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
790 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
791 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
792 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
793 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
794 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
795 extern const struct fb_cmap *fb_default_cmap(int len);
796 extern void fb_invert_cmaps(void);
798 struct fb_videomode {
799 const char *name; /* optional */
800 u32 refresh; /* optional */
815 struct dmt_videomode {
819 const struct fb_videomode *mode;
822 extern const char *fb_mode_option;
823 extern const struct fb_videomode vesa_modes[];
824 extern const struct fb_videomode cea_modes[65];
825 extern const struct dmt_videomode dmt_modes[];
828 struct list_head list;
829 struct fb_videomode mode;
832 extern int fb_find_mode(struct fb_var_screeninfo *var,
833 struct fb_info *info, const char *mode_option,
834 const struct fb_videomode *db,
836 const struct fb_videomode *default_mode,
837 unsigned int default_bpp);
839 /* Convenience logging macros */
840 #define fb_err(fb_info, fmt, ...) \
841 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
842 #define fb_notice(info, fmt, ...) \
843 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
844 #define fb_warn(fb_info, fmt, ...) \
845 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
846 #define fb_info(fb_info, fmt, ...) \
847 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
848 #define fb_dbg(fb_info, fmt, ...) \
849 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
851 #endif /* _LINUX_FB_H */