Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_FB_H
3#define _LINUX_FB_H
4
5#include <uapi/linux/fb.h>
6
7#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
8
9#include <linux/mutex.h>
10#include <linux/printk.h>
11#include <linux/refcount.h>
12#include <linux/types.h>
13#include <linux/workqueue.h>
14
15#include <asm/video.h>
16
17struct backlight_device;
18struct device;
19struct device_node;
20struct fb_info;
21struct fbcon_par;
22struct file;
23struct i2c_adapter;
24struct inode;
25struct lcd_device;
26struct module;
27struct notifier_block;
28struct page;
29struct videomode;
30struct vm_area_struct;
31
32/* Definitions below are used in the parsed monitor specs */
33#define FB_DPMS_ACTIVE_OFF 1
34#define FB_DPMS_SUSPEND 2
35#define FB_DPMS_STANDBY 4
36
37#define FB_DISP_DDI 1
38#define FB_DISP_ANA_700_300 2
39#define FB_DISP_ANA_714_286 4
40#define FB_DISP_ANA_1000_400 8
41#define FB_DISP_ANA_700_000 16
42
43#define FB_DISP_MONO 32
44#define FB_DISP_RGB 64
45#define FB_DISP_MULTI 128
46#define FB_DISP_UNKNOWN 256
47
48#define FB_SIGNAL_NONE 0
49#define FB_SIGNAL_BLANK_BLANK 1
50#define FB_SIGNAL_SEPARATE 2
51#define FB_SIGNAL_COMPOSITE 4
52#define FB_SIGNAL_SYNC_ON_GREEN 8
53#define FB_SIGNAL_SERRATION_ON 16
54
55#define FB_MISC_PRIM_COLOR 1
56#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
57#define FB_MISC_HDMI 4
58struct fb_chroma {
59 __u32 redx; /* in fraction of 1024 */
60 __u32 greenx;
61 __u32 bluex;
62 __u32 whitex;
63 __u32 redy;
64 __u32 greeny;
65 __u32 bluey;
66 __u32 whitey;
67};
68
69struct fb_monspecs {
70 struct fb_chroma chroma;
71 struct fb_videomode *modedb; /* mode database */
72 __u8 manufacturer[4]; /* Manufacturer */
73 __u8 monitor[14]; /* Monitor String */
74 __u8 serial_no[14]; /* Serial Number */
75 __u8 ascii[14]; /* ? */
76 __u32 modedb_len; /* mode database length */
77 __u32 model; /* Monitor Model */
78 __u32 serial; /* Serial Number - Integer */
79 __u32 year; /* Year manufactured */
80 __u32 week; /* Week Manufactured */
81 __u32 hfmin; /* hfreq lower limit (Hz) */
82 __u32 hfmax; /* hfreq upper limit (Hz) */
83 __u32 dclkmin; /* pixelclock lower limit (Hz) */
84 __u32 dclkmax; /* pixelclock upper limit (Hz) */
85 __u16 input; /* display type - see FB_DISP_* */
86 __u16 dpms; /* DPMS support - see FB_DPMS_ */
87 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
88 __u16 vfmin; /* vfreq lower limit (Hz) */
89 __u16 vfmax; /* vfreq upper limit (Hz) */
90 __u16 gamma; /* Gamma - in fractions of 100 */
91 __u16 gtf : 1; /* supports GTF */
92 __u16 misc; /* Misc flags - see FB_MISC_* */
93 __u8 version; /* EDID version... */
94 __u8 revision; /* ...and revision */
95 __u8 max_x; /* Maximum horizontal size (cm) */
96 __u8 max_y; /* Maximum vertical size (cm) */
97};
98
99struct fb_cmap_user {
100 __u32 start; /* First entry */
101 __u32 len; /* Number of entries */
102 __u16 __user *red; /* Red values */
103 __u16 __user *green;
104 __u16 __user *blue;
105 __u16 __user *transp; /* transparency, can be NULL */
106};
107
108struct fb_image_user {
109 __u32 dx; /* Where to place image */
110 __u32 dy;
111 __u32 width; /* Size of image */
112 __u32 height;
113 __u32 fg_color; /* Only used when a mono bitmap */
114 __u32 bg_color;
115 __u8 depth; /* Depth of the image */
116 const char __user *data; /* Pointer to image data */
117 struct fb_cmap_user cmap; /* color map info */
118};
119
120struct fb_cursor_user {
121 __u16 set; /* what to set */
122 __u16 enable; /* cursor on/off */
123 __u16 rop; /* bitop operation */
124 const char __user *mask; /* cursor mask bits */
125 struct fbcurpos hot; /* cursor hot spot */
126 struct fb_image_user image; /* Cursor image */
127};
128
129/*
130 * Register/unregister for framebuffer events
131 */
132
133#ifdef CONFIG_GUMSTIX_AM200EPD
134/* only used by mach-pxa/am200epd.c */
135#define FB_EVENT_FB_REGISTERED 0x05
136#define FB_EVENT_FB_UNREGISTERED 0x06
137#endif
138
139struct fb_event {
140 struct fb_info *info;
141 void *data;
142};
143
144/* Enough for the VT console needs, see its max_font_width/height */
145#define FB_MAX_BLIT_WIDTH 64
146#define FB_MAX_BLIT_HEIGHT 128
147
148struct fb_blit_caps {
149 DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH);
150 DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT);
151 u32 len;
152 u32 flags;
153};
154
155#ifdef CONFIG_FB_NOTIFY
156extern int fb_register_client(struct notifier_block *nb);
157extern int fb_unregister_client(struct notifier_block *nb);
158extern int fb_notifier_call_chain(unsigned long val, void *v);
159#else
160static inline int fb_register_client(struct notifier_block *nb)
161{
162 return 0;
163};
164
165static inline int fb_unregister_client(struct notifier_block *nb)
166{
167 return 0;
168};
169
170static inline int fb_notifier_call_chain(unsigned long val, void *v)
171{
172 return 0;
173};
174#endif
175
176/*
177 * Pixmap structure definition
178 *
179 * The purpose of this structure is to translate data
180 * from the hardware independent format of fbdev to what
181 * format the hardware needs.
182 */
183
184#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
185#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
186#define FB_PIXMAP_IO 4 /* memory is iomapped */
187#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
188
189struct fb_pixmap {
190 u8 *addr; /* pointer to memory */
191 u32 size; /* size of buffer in bytes */
192 u32 offset; /* current offset to buffer */
193 u32 buf_align; /* byte alignment of each bitmap */
194 u32 scan_align; /* alignment per scanline */
195 u32 access_align; /* alignment per read/write (bits) */
196 u32 flags; /* see FB_PIXMAP_* */
197 /* supported bit block dimensions */
198 /* Format: test_bit(width - 1, blit_x) */
199 /* test_bit(height - 1, blit_y) */
200 /* if zero, will be set to full (all) */
201 DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH);
202 DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT);
203 /* access methods */
204 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
205 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
206};
207
208#ifdef CONFIG_FB_DEFERRED_IO
209struct fb_deferred_io_pageref {
210 struct page *page;
211 unsigned long offset;
212 /* private */
213 struct list_head list;
214};
215
216struct fb_deferred_io {
217 /* delay between mkwrite and deferred handler */
218 unsigned long delay;
219 bool sort_pagereflist; /* sort pagelist by offset */
220 /* callback */
221 struct page *(*get_page)(struct fb_info *info, unsigned long offset);
222 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
223};
224
225struct fb_deferred_io_state;
226#endif
227
228/*
229 * Frame buffer operations
230 *
231 * LOCKING NOTE: those functions must _ALL_ be called with the console
232 * semaphore held, this is the only suitable locking mechanism we have
233 * in 2.6. Some may be called at interrupt time at this point though.
234 *
235 * The exception to this is the debug related hooks. Putting the fb
236 * into a debug state (e.g. flipping to the kernel console) and restoring
237 * it must be done in a lock-free manner, so low level drivers should
238 * keep track of the initial console (if applicable) and may need to
239 * perform direct, unlocked hardware writes in these hooks.
240 */
241
242struct fb_ops {
243 /* open/release and usage marking */
244 struct module *owner;
245 int (*fb_open)(struct fb_info *info, int user);
246 int (*fb_release)(struct fb_info *info, int user);
247
248 /* For framebuffers with strange non linear layouts or that do not
249 * work with normal memory mapped access
250 */
251 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
252 size_t count, loff_t *ppos);
253 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
254 size_t count, loff_t *ppos);
255
256 /* checks var and eventually tweaks it to something supported,
257 * DO NOT MODIFY PAR */
258 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
259
260 /* set the video mode according to info->var */
261 int (*fb_set_par)(struct fb_info *info);
262
263 /* set color register */
264 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
265 unsigned blue, unsigned transp, struct fb_info *info);
266
267 /* set color registers in batch */
268 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
269
270 /* blank display */
271 int (*fb_blank)(int blank, struct fb_info *info);
272
273 /* pan display */
274 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
275
276 /* Draws a rectangle */
277 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
278 /* Copy data from area to another */
279 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
280 /* Draws a image to the display */
281 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
282
283 /* Draws cursor */
284 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
285
286 /* wait for blit idle, optional */
287 int (*fb_sync)(struct fb_info *info);
288
289 /* perform fb specific ioctl (optional) */
290 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
291 unsigned long arg);
292
293 /* Handle 32bit compat ioctl (optional) */
294 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
295 unsigned long arg);
296
297 /* perform fb specific mmap */
298 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
299
300 /* get capability given var */
301 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
302 struct fb_var_screeninfo *var);
303
304 /* teardown any resources to do with this framebuffer */
305 void (*fb_destroy)(struct fb_info *info);
306};
307
308#ifdef CONFIG_FB_TILEBLITTING
309#define FB_TILE_CURSOR_NONE 0
310#define FB_TILE_CURSOR_UNDERLINE 1
311#define FB_TILE_CURSOR_LOWER_THIRD 2
312#define FB_TILE_CURSOR_LOWER_HALF 3
313#define FB_TILE_CURSOR_TWO_THIRDS 4
314#define FB_TILE_CURSOR_BLOCK 5
315
316struct fb_tilemap {
317 __u32 width; /* width of each tile in pixels */
318 __u32 height; /* height of each tile in scanlines */
319 __u32 depth; /* color depth of each tile */
320 __u32 length; /* number of tiles in the map */
321 const __u8 *data; /* actual tile map: a bitmap array, packed
322 to the nearest byte */
323};
324
325struct fb_tilerect {
326 __u32 sx; /* origin in the x-axis */
327 __u32 sy; /* origin in the y-axis */
328 __u32 width; /* number of tiles in the x-axis */
329 __u32 height; /* number of tiles in the y-axis */
330 __u32 index; /* what tile to use: index to tile map */
331 __u32 fg; /* foreground color */
332 __u32 bg; /* background color */
333 __u32 rop; /* raster operation */
334};
335
336struct fb_tilearea {
337 __u32 sx; /* source origin in the x-axis */
338 __u32 sy; /* source origin in the y-axis */
339 __u32 dx; /* destination origin in the x-axis */
340 __u32 dy; /* destination origin in the y-axis */
341 __u32 width; /* number of tiles in the x-axis */
342 __u32 height; /* number of tiles in the y-axis */
343};
344
345struct fb_tileblit {
346 __u32 sx; /* origin in the x-axis */
347 __u32 sy; /* origin in the y-axis */
348 __u32 width; /* number of tiles in the x-axis */
349 __u32 height; /* number of tiles in the y-axis */
350 __u32 fg; /* foreground color */
351 __u32 bg; /* background color */
352 __u32 length; /* number of tiles to draw */
353 __u32 *indices; /* array of indices to tile map */
354};
355
356struct fb_tilecursor {
357 __u32 sx; /* cursor position in the x-axis */
358 __u32 sy; /* cursor position in the y-axis */
359 __u32 mode; /* 0 = erase, 1 = draw */
360 __u32 shape; /* see FB_TILE_CURSOR_* */
361 __u32 fg; /* foreground color */
362 __u32 bg; /* background color */
363};
364
365struct fb_tile_ops {
366 /* set tile characteristics */
367 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
368
369 /* all dimensions from hereon are in terms of tiles */
370
371 /* move a rectangular region of tiles from one area to another*/
372 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
373 /* fill a rectangular region with a tile */
374 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
375 /* copy an array of tiles */
376 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
377 /* cursor */
378 void (*fb_tilecursor)(struct fb_info *info,
379 struct fb_tilecursor *cursor);
380 /* get maximum length of the tile map */
381 int (*fb_get_tilemax)(struct fb_info *info);
382};
383#endif /* CONFIG_FB_TILEBLITTING */
384
385/* FBINFO_* = fb_info.flags bit flags */
386#define FBINFO_HWACCEL_DISABLED 0x0002
387 /* When FBINFO_HWACCEL_DISABLED is set:
388 * Hardware acceleration is turned off. Software implementations
389 * of required functions (copyarea(), fillrect(), and imageblit())
390 * takes over; acceleration engine should be in a quiescent state */
391
392/* hints */
393#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
394#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
395#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
396
397/* hardware supported ops */
398/* semantics: when a bit is set, it indicates that the operation is
399 * accelerated by hardware.
400 * required functions will still work even if the bit is not set.
401 * optional functions may not even exist if the flag bit is not set.
402 */
403#define FBINFO_HWACCEL_NONE 0x0000
404#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
405#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
406#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
407#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
408#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
409#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
410#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
411
412#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
413
414/* A driver may set this flag to indicate that it does want a set_par to be
415 * called every time when fbcon_switch is executed. The advantage is that with
416 * this flag set you can really be sure that set_par is always called before
417 * any of the functions dependent on the correct hardware state or altering
418 * that state, even if you are using some broken X releases. The disadvantage
419 * is that it introduces unwanted delays to every console switch if set_par
420 * is slow. It is a good idea to try this flag in the drivers initialization
421 * code whenever there is a bug report related to switching between X and the
422 * framebuffer console.
423 */
424#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
425
426/*
427 * Host and GPU endianness differ.
428 */
429#define FBINFO_FOREIGN_ENDIAN 0x100000
430/*
431 * Big endian math. This is the same flags as above, but with different
432 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
433 * and host endianness. Drivers should not use this flag.
434 */
435#define FBINFO_BE_MATH 0x100000
436/*
437 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
438 * drivers to stop userspace from trying to share buffers behind the kernel's
439 * back. Instead dma-buf based buffer sharing should be used.
440 */
441#define FBINFO_HIDE_SMEM_START 0x200000
442
443
444struct fb_info {
445 refcount_t count;
446 int node;
447 int flags;
448 /*
449 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
450 * a lcd is not mounted upright and fbcon should rotate to compensate.
451 */
452 int fbcon_rotate_hint;
453 struct mutex lock; /* Lock for open/release/ioctl funcs */
454 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
455 struct fb_var_screeninfo var; /* Current var */
456 struct fb_fix_screeninfo fix; /* Current fix */
457 struct fb_monspecs monspecs; /* Current Monitor specs */
458 struct fb_pixmap pixmap; /* Image hardware mapper */
459 struct fb_pixmap sprite; /* Cursor hardware mapper */
460 struct fb_cmap cmap; /* Current cmap */
461 struct list_head modelist; /* mode list */
462 struct fb_videomode *mode; /* current mode */
463
464 int blank; /* current blanking; see FB_BLANK_ constants */
465
466#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
467 /* assigned backlight device */
468 /* set before framebuffer registration,
469 remove after unregister */
470 struct backlight_device *bl_dev;
471
472 /* Backlight level curve */
473 struct mutex bl_curve_mutex;
474 u8 bl_curve[FB_BACKLIGHT_LEVELS];
475#endif
476
477 /*
478 * Assigned LCD device; set before framebuffer
479 * registration, remove after unregister
480 */
481 struct lcd_device *lcd_dev;
482
483#ifdef CONFIG_FB_DEFERRED_IO
484 struct delayed_work deferred_work;
485 struct fb_deferred_io *fbdefio;
486 struct fb_deferred_io_state *fbdefio_state;
487#endif
488
489 const struct fb_ops *fbops;
490 struct device *device; /* This is the parent */
491#if defined(CONFIG_FB_DEVICE)
492 struct device *dev; /* This is this fb device */
493#endif
494#ifdef CONFIG_FB_TILEBLITTING
495 struct fb_tile_ops *tileops; /* Tile Blitting */
496#endif
497 union {
498 char __iomem *screen_base; /* Virtual address */
499 char *screen_buffer;
500 };
501 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
502 void *pseudo_palette; /* Fake palette of 16 colors */
503#define FBINFO_STATE_RUNNING 0
504#define FBINFO_STATE_SUSPENDED 1
505 u32 state; /* Hardware state i.e suspend */
506 struct fbcon_par *fbcon_par; /* fbcon use-only private area */
507 /* From here on everything is device dependent */
508 void *par;
509
510 bool skip_vt_switch; /* no VT switch on suspend/resume required */
511 bool skip_panic; /* Do not write to the fb after a panic */
512};
513
514/* This will go away
515 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
516 * when it wants to turn the acceleration engine on. This is
517 * really a separate operation, and should be modified via sysfs.
518 * But for now, we leave it broken with the following define
519 */
520#define STUPID_ACCELF_TEXT_SHIT
521
522#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
523#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
524 (val) << (bits))
525#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
526 (val) >> (bits))
527
528 /*
529 * `Generic' versions of the frame buffer device operations
530 */
531
532extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
533extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
534extern int fb_blank(struct fb_info *info, int blank);
535
536/*
537 * Helpers for framebuffers in I/O memory
538 */
539
540extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
541extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
542extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
543extern ssize_t fb_io_read(struct fb_info *info, char __user *buf,
544 size_t count, loff_t *ppos);
545extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf,
546 size_t count, loff_t *ppos);
547int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
548
549#define __FB_DEFAULT_IOMEM_OPS_RDWR \
550 .fb_read = fb_io_read, \
551 .fb_write = fb_io_write
552
553#define __FB_DEFAULT_IOMEM_OPS_DRAW \
554 .fb_fillrect = cfb_fillrect, \
555 .fb_copyarea = cfb_copyarea, \
556 .fb_imageblit = cfb_imageblit
557
558#define __FB_DEFAULT_IOMEM_OPS_MMAP \
559 .fb_mmap = fb_io_mmap
560
561#define FB_DEFAULT_IOMEM_OPS \
562 __FB_DEFAULT_IOMEM_OPS_RDWR, \
563 __FB_DEFAULT_IOMEM_OPS_DRAW, \
564 __FB_DEFAULT_IOMEM_OPS_MMAP
565
566/*
567 * Helpers for framebuffers in system memory
568 */
569
570extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
571extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
572extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
573extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
574 size_t count, loff_t *ppos);
575extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
576 size_t count, loff_t *ppos);
577
578#define __FB_DEFAULT_SYSMEM_OPS_RDWR \
579 .fb_read = fb_sys_read, \
580 .fb_write = fb_sys_write
581
582#define __FB_DEFAULT_SYSMEM_OPS_DRAW \
583 .fb_fillrect = sys_fillrect, \
584 .fb_copyarea = sys_copyarea, \
585 .fb_imageblit = sys_imageblit
586
587/*
588 * Helpers for framebuffers in DMA-able memory
589 */
590
591#define __FB_DEFAULT_DMAMEM_OPS_RDWR \
592 .fb_read = fb_sys_read, \
593 .fb_write = fb_sys_write
594
595#define __FB_DEFAULT_DMAMEM_OPS_DRAW \
596 .fb_fillrect = sys_fillrect, \
597 .fb_copyarea = sys_copyarea, \
598 .fb_imageblit = sys_imageblit
599
600/* fbmem.c */
601extern int register_framebuffer(struct fb_info *fb_info);
602extern void unregister_framebuffer(struct fb_info *fb_info);
603extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info);
604extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
605void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 idx, u32 height,
606 u32 shift_high, u32 shift_low, u32 mod);
607void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 s_pitch, u32 height);
608extern void fb_set_suspend(struct fb_info *info, int state);
609extern int fb_get_color_depth(struct fb_var_screeninfo *var,
610 struct fb_fix_screeninfo *fix);
611extern int fb_get_options(const char *name, char **option);
612extern int fb_new_modelist(struct fb_info *info);
613
614static inline void lock_fb_info(struct fb_info *info)
615{
616 mutex_lock(&info->lock);
617}
618
619static inline void unlock_fb_info(struct fb_info *info)
620{
621 mutex_unlock(&info->lock);
622}
623
624static inline struct device *dev_of_fbinfo(const struct fb_info *info)
625{
626#ifdef CONFIG_FB_DEVICE
627 return info->dev;
628#else
629 return NULL;
630#endif
631}
632
633static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 s_pitch,
634 u32 height)
635{
636 u32 i, j;
637
638 d_pitch -= s_pitch;
639
640 for (i = height; i--; ) {
641 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
642 for (j = 0; j < s_pitch; j++)
643 *dst++ = *src++;
644 dst += d_pitch;
645 }
646}
647
648/* fb_defio.c */
649int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
650extern int fb_deferred_io_init(struct fb_info *info);
651extern void fb_deferred_io_open(struct fb_info *info,
652 struct inode *inode,
653 struct file *file);
654extern void fb_deferred_io_release(struct fb_info *info);
655extern void fb_deferred_io_cleanup(struct fb_info *info);
656extern int fb_deferred_io_fsync(struct file *file, loff_t start,
657 loff_t end, int datasync);
658
659/*
660 * Generate callbacks for deferred I/O
661 */
662
663#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \
664 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \
665 size_t count, loff_t *ppos) \
666 { \
667 return fb_ ## __mode ## _read(info, buf, count, ppos); \
668 } \
669 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \
670 size_t count, loff_t *ppos) \
671 { \
672 unsigned long offset = *ppos; \
673 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \
674 if (ret > 0) \
675 __damage_range(info, offset, ret); \
676 return ret; \
677 }
678
679#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \
680 static void __prefix ## _defio_fillrect(struct fb_info *info, \
681 const struct fb_fillrect *rect) \
682 { \
683 __mode ## _fillrect(info, rect); \
684 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \
685 } \
686 static void __prefix ## _defio_copyarea(struct fb_info *info, \
687 const struct fb_copyarea *area) \
688 { \
689 __mode ## _copyarea(info, area); \
690 __damage_area(info, area->dx, area->dy, area->width, area->height); \
691 } \
692 static void __prefix ## _defio_imageblit(struct fb_info *info, \
693 const struct fb_image *image) \
694 { \
695 __mode ## _imageblit(info, image); \
696 __damage_area(info, image->dx, image->dy, image->width, image->height); \
697 }
698
699#define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \
700 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \
701 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb)
702
703#define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \
704 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
705 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
706
707#define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \
708 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
709 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
710
711/*
712 * Initializes struct fb_ops for deferred I/O.
713 */
714
715#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \
716 .fb_read = __prefix ## _defio_read, \
717 .fb_write = __prefix ## _defio_write
718
719#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \
720 .fb_fillrect = __prefix ## _defio_fillrect, \
721 .fb_copyarea = __prefix ## _defio_copyarea, \
722 .fb_imageblit = __prefix ## _defio_imageblit
723
724#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \
725 .fb_mmap = fb_deferred_io_mmap
726
727#define FB_DEFAULT_DEFERRED_OPS(__prefix) \
728 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \
729 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \
730 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix)
731
732static inline bool fb_be_math(struct fb_info *info)
733{
734#ifdef CONFIG_FB_FOREIGN_ENDIAN
735#if defined(CONFIG_FB_BOTH_ENDIAN)
736 return info->flags & FBINFO_BE_MATH;
737#elif defined(CONFIG_FB_BIG_ENDIAN)
738 return true;
739#elif defined(CONFIG_FB_LITTLE_ENDIAN)
740 return false;
741#endif /* CONFIG_FB_BOTH_ENDIAN */
742#else
743#ifdef __BIG_ENDIAN
744 return true;
745#else
746 return false;
747#endif /* __BIG_ENDIAN */
748#endif /* CONFIG_FB_FOREIGN_ENDIAN */
749}
750
751extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
752extern void framebuffer_release(struct fb_info *info);
753extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
754
755#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
756struct backlight_device *fb_bl_device(struct fb_info *info);
757void fb_bl_notify_blank(struct fb_info *info, int old_blank);
758#else
759static inline struct backlight_device *fb_bl_device(struct fb_info *info)
760{
761 return NULL;
762}
763
764static inline void fb_bl_notify_blank(struct fb_info *info, int old_blank)
765{ }
766#endif
767
768static inline struct lcd_device *fb_lcd_device(struct fb_info *info)
769{
770 return info->lcd_dev;
771}
772
773/* fbmon.c */
774#define FB_MAXTIMINGS 0
775#define FB_VSYNCTIMINGS 1
776#define FB_HSYNCTIMINGS 2
777#define FB_DCLKTIMINGS 3
778#define FB_IGNOREMON 0x100
779
780#define FB_MODE_IS_UNKNOWN 0
781#define FB_MODE_IS_DETAILED 1
782#define FB_MODE_IS_STANDARD 2
783#define FB_MODE_IS_VESA 4
784#define FB_MODE_IS_CALCULATED 8
785#define FB_MODE_IS_FIRST 16
786#define FB_MODE_IS_FROM_VAR 32
787
788extern int fbmon_dpms(const struct fb_info *fb_info);
789extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
790 struct fb_info *info);
791extern int fb_validate_mode(const struct fb_var_screeninfo *var,
792 struct fb_info *info);
793extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
794extern const unsigned char *fb_firmware_edid(struct device *device);
795extern void fb_edid_to_monspecs(unsigned char *edid,
796 struct fb_monspecs *specs);
797extern void fb_destroy_modedb(struct fb_videomode *modedb);
798extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
799extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
800
801extern int of_get_fb_videomode(struct device_node *np,
802 struct fb_videomode *fb,
803 int index);
804extern int fb_videomode_from_videomode(const struct videomode *vm,
805 struct fb_videomode *fbmode);
806
807/* modedb.c */
808#define VESA_MODEDB_SIZE 43
809#define DMT_SIZE 0x50
810
811extern void fb_var_to_videomode(struct fb_videomode *mode,
812 const struct fb_var_screeninfo *var);
813extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
814 const struct fb_videomode *mode);
815extern int fb_mode_is_equal(const struct fb_videomode *mode1,
816 const struct fb_videomode *mode2);
817extern int fb_add_videomode(const struct fb_videomode *mode,
818 struct list_head *head);
819extern void fb_delete_videomode(const struct fb_videomode *mode,
820 struct list_head *head);
821extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
822 struct list_head *head);
823extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
824 struct list_head *head);
825extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
826 struct list_head *head);
827extern void fb_destroy_modelist(struct list_head *head);
828extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
829 struct list_head *head);
830extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
831 struct list_head *head);
832
833/* fbcmap.c */
834extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
835extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
836extern void fb_dealloc_cmap(struct fb_cmap *cmap);
837extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
838extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
839extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
840extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
841extern const struct fb_cmap *fb_default_cmap(int len);
842extern void fb_invert_cmaps(void);
843
844struct fb_videomode {
845 const char *name; /* optional */
846 u32 refresh; /* optional */
847 u32 xres;
848 u32 yres;
849 u32 pixclock;
850 u32 left_margin;
851 u32 right_margin;
852 u32 upper_margin;
853 u32 lower_margin;
854 u32 hsync_len;
855 u32 vsync_len;
856 u32 sync;
857 u32 vmode;
858 u32 flag;
859};
860
861struct dmt_videomode {
862 u32 dmt_id;
863 u32 std_2byte_code;
864 u32 cvt_3byte_code;
865 const struct fb_videomode *mode;
866};
867
868extern const struct fb_videomode vesa_modes[];
869extern const struct dmt_videomode dmt_modes[];
870
871struct fb_modelist {
872 struct list_head list;
873 struct fb_videomode mode;
874};
875
876extern int fb_find_mode(struct fb_var_screeninfo *var,
877 struct fb_info *info, const char *mode_option,
878 const struct fb_videomode *db,
879 unsigned int dbsize,
880 const struct fb_videomode *default_mode,
881 unsigned int default_bpp);
882
883bool fb_modesetting_disabled(const char *drvname);
884
885/*
886 * Convenience logging macros
887 */
888
889#define fb_err(fb_info, fmt, ...) \
890 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
891#define fb_notice(info, fmt, ...) \
892 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
893#define fb_warn(fb_info, fmt, ...) \
894 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
895#define fb_info(fb_info, fmt, ...) \
896 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
897#define fb_dbg(fb_info, fmt, ...) \
898 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
899
900#define fb_warn_once(fb_info, fmt, ...) \
901 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
902
903#define fb_WARN_ONCE(fb_info, condition, fmt, ...) \
904 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
905#define fb_WARN_ON_ONCE(fb_info, x) \
906 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")")
907
908#endif /* _LINUX_FB_H */