1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_FB_H
3 #define _LINUX_FB_H
4
5 #include <linux/refcount.h>
6 #include <linux/kgdb.h>
7 #include <uapi/linux/fb.h>
8
9 #define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
10
11 #include <linux/fs.h>
12 #include <linux/init.h>
13 #include <linux/workqueue.h>
14 #include <linux/notifier.h>
15 #include <linux/list.h>
16 #include <linux/backlight.h>
17 #include <linux/slab.h>
18 #include <asm/io.h>
19
20 struct vm_area_struct;
21 struct fb_info;
22 struct device;
23 struct file;
24 struct videomode;
25 struct device_node;
26
27 /* Definitions below are used in the parsed monitor specs */
28 #define FB_DPMS_ACTIVE_OFF 1
29 #define FB_DPMS_SUSPEND 2
30 #define FB_DPMS_STANDBY 4
31
32 #define FB_DISP_DDI 1
33 #define FB_DISP_ANA_700_300 2
34 #define FB_DISP_ANA_714_286 4
35 #define FB_DISP_ANA_1000_400 8
36 #define FB_DISP_ANA_700_000 16
37
38 #define FB_DISP_MONO 32
39 #define FB_DISP_RGB 64
40 #define FB_DISP_MULTI 128
41 #define FB_DISP_UNKNOWN 256
42
43 #define FB_SIGNAL_NONE 0
44 #define FB_SIGNAL_BLANK_BLANK 1
45 #define FB_SIGNAL_SEPARATE 2
46 #define FB_SIGNAL_COMPOSITE 4
47 #define FB_SIGNAL_SYNC_ON_GREEN 8
48 #define FB_SIGNAL_SERRATION_ON 16
49
50 #define FB_MISC_PRIM_COLOR 1
51 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
52 #define FB_MISC_HDMI 4
53 struct fb_chroma {
54 __u32 redx; /* in fraction of 1024 */
55 __u32 greenx;
56 __u32 bluex;
57 __u32 whitex;
58 __u32 redy;
59 __u32 greeny;
60 __u32 bluey;
61 __u32 whitey;
62 };
63
64 struct fb_monspecs {
65 struct fb_chroma chroma;
66 struct fb_videomode *modedb; /* mode database */
67 __u8 manufacturer[4]; /* Manufacturer */
68 __u8 monitor[14]; /* Monitor String */
69 __u8 serial_no[14]; /* Serial Number */
70 __u8 ascii[14]; /* ? */
71 __u32 modedb_len; /* mode database length */
72 __u32 model; /* Monitor Model */
73 __u32 serial; /* Serial Number - Integer */
74 __u32 year; /* Year manufactured */
75 __u32 week; /* Week Manufactured */
76 __u32 hfmin; /* hfreq lower limit (Hz) */
77 __u32 hfmax; /* hfreq upper limit (Hz) */
78 __u32 dclkmin; /* pixelclock lower limit (Hz) */
79 __u32 dclkmax; /* pixelclock upper limit (Hz) */
80 __u16 input; /* display type - see FB_DISP_* */
81 __u16 dpms; /* DPMS support - see FB_DPMS_ */
82 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
83 __u16 vfmin; /* vfreq lower limit (Hz) */
84 __u16 vfmax; /* vfreq upper limit (Hz) */
85 __u16 gamma; /* Gamma - in fractions of 100 */
86 __u16 gtf : 1; /* supports GTF */
87 __u16 misc; /* Misc flags - see FB_MISC_* */
88 __u8 version; /* EDID version... */
89 __u8 revision; /* ...and revision */
90 __u8 max_x; /* Maximum horizontal size (cm) */
91 __u8 max_y; /* Maximum vertical size (cm) */
92 };
93
94 struct fb_cmap_user {
95 __u32 start; /* First entry */
96 __u32 len; /* Number of entries */
97 __u16 __user *red; /* Red values */
98 __u16 __user *green;
99 __u16 __user *blue;
100 __u16 __user *transp; /* transparency, can be NULL */
101 };
102
103 struct fb_image_user {
104 __u32 dx; /* Where to place image */
105 __u32 dy;
106 __u32 width; /* Size of image */
107 __u32 height;
108 __u32 fg_color; /* Only used when a mono bitmap */
109 __u32 bg_color;
110 __u8 depth; /* Depth of the image */
111 const char __user *data; /* Pointer to image data */
112 struct fb_cmap_user cmap; /* color map info */
113 };
114
115 struct fb_cursor_user {
116 __u16 set; /* what to set */
117 __u16 enable; /* cursor on/off */
118 __u16 rop; /* bitop operation */
119 const char __user *mask; /* cursor mask bits */
120 struct fbcurpos hot; /* cursor hot spot */
121 struct fb_image_user image; /* Cursor image */
122 };
123
124 /*
125 * Register/unregister for framebuffer events
126 */
127
128 /* The resolution of the passed in fb_info about to change */
129 #define FB_EVENT_MODE_CHANGE 0x01
130
131 #ifdef CONFIG_GUMSTIX_AM200EPD
132 /* only used by mach-pxa/am200epd.c */
133 #define FB_EVENT_FB_REGISTERED 0x05
134 #define FB_EVENT_FB_UNREGISTERED 0x06
135 #endif
136
137 /* A display blank is requested */
138 #define FB_EVENT_BLANK 0x09
139
140 struct fb_event {
141 struct fb_info *info;
142 void *data;
143 };
144
145 struct fb_blit_caps {
146 u32 x;
147 u32 y;
148 u32 len;
149 u32 flags;
150 };
151
152 #ifdef CONFIG_FB_NOTIFY
153 extern int fb_register_client(struct notifier_block *nb);
154 extern int fb_unregister_client(struct notifier_block *nb);
155 extern int fb_notifier_call_chain(unsigned long val, void *v);
156 #else
fb_register_client(struct notifier_block * nb)157 static inline int fb_register_client(struct notifier_block *nb)
158 {
159 return 0;
160 };
161
fb_unregister_client(struct notifier_block * nb)162 static inline int fb_unregister_client(struct notifier_block *nb)
163 {
164 return 0;
165 };
166
fb_notifier_call_chain(unsigned long val,void * v)167 static inline int fb_notifier_call_chain(unsigned long val, void *v)
168 {
169 return 0;
170 };
171 #endif
172
173 /*
174 * Pixmap structure definition
175 *
176 * The purpose of this structure is to translate data
177 * from the hardware independent format of fbdev to what
178 * format the hardware needs.
179 */
180
181 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
182 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
183 #define FB_PIXMAP_IO 4 /* memory is iomapped */
184 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
185
186 struct fb_pixmap {
187 u8 *addr; /* pointer to memory */
188 u32 size; /* size of buffer in bytes */
189 u32 offset; /* current offset to buffer */
190 u32 buf_align; /* byte alignment of each bitmap */
191 u32 scan_align; /* alignment per scanline */
192 u32 access_align; /* alignment per read/write (bits) */
193 u32 flags; /* see FB_PIXMAP_* */
194 u32 blit_x; /* supported bit block dimensions (1-32)*/
195 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
196 /* blit_y = 1 << (height - 1) */
197 /* if 0, will be set to 0xffffffff (all)*/
198 /* access methods */
199 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
200 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
201 };
202
203 #ifdef CONFIG_FB_DEFERRED_IO
204 struct fb_deferred_io_pageref {
205 struct page *page;
206 unsigned long offset;
207 /* private */
208 struct list_head list;
209 };
210
211 struct fb_deferred_io {
212 /* delay between mkwrite and deferred handler */
213 unsigned long delay;
214 bool sort_pagereflist; /* sort pagelist by offset */
215 struct mutex lock; /* mutex that protects the pageref list */
216 struct list_head pagereflist; /* list of pagerefs for touched pages */
217 /* callback */
218 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
219 };
220 #endif
221
222 /*
223 * Frame buffer operations
224 *
225 * LOCKING NOTE: those functions must _ALL_ be called with the console
226 * semaphore held, this is the only suitable locking mechanism we have
227 * in 2.6. Some may be called at interrupt time at this point though.
228 *
229 * The exception to this is the debug related hooks. Putting the fb
230 * into a debug state (e.g. flipping to the kernel console) and restoring
231 * it must be done in a lock-free manner, so low level drivers should
232 * keep track of the initial console (if applicable) and may need to
233 * perform direct, unlocked hardware writes in these hooks.
234 */
235
236 struct fb_ops {
237 /* open/release and usage marking */
238 struct module *owner;
239 int (*fb_open)(struct fb_info *info, int user);
240 int (*fb_release)(struct fb_info *info, int user);
241
242 /* For framebuffers with strange non linear layouts or that do not
243 * work with normal memory mapped access
244 */
245 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
246 size_t count, loff_t *ppos);
247 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
248 size_t count, loff_t *ppos);
249
250 /* checks var and eventually tweaks it to something supported,
251 * DO NOT MODIFY PAR */
252 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
253
254 /* set the video mode according to info->var */
255 int (*fb_set_par)(struct fb_info *info);
256
257 /* set color register */
258 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
259 unsigned blue, unsigned transp, struct fb_info *info);
260
261 /* set color registers in batch */
262 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
263
264 /* blank display */
265 int (*fb_blank)(int blank, struct fb_info *info);
266
267 /* pan display */
268 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
269
270 /* Draws a rectangle */
271 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
272 /* Copy data from area to another */
273 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
274 /* Draws a image to the display */
275 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
276
277 /* Draws cursor */
278 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
279
280 /* wait for blit idle, optional */
281 int (*fb_sync)(struct fb_info *info);
282
283 /* perform fb specific ioctl (optional) */
284 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
285 unsigned long arg);
286
287 /* Handle 32bit compat ioctl (optional) */
288 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
289 unsigned long arg);
290
291 /* perform fb specific mmap */
292 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
293
294 /* get capability given var */
295 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
296 struct fb_var_screeninfo *var);
297
298 /* teardown any resources to do with this framebuffer */
299 void (*fb_destroy)(struct fb_info *info);
300
301 /* called at KDB enter and leave time to prepare the console */
302 int (*fb_debug_enter)(struct fb_info *info);
303 int (*fb_debug_leave)(struct fb_info *info);
304 };
305
306 #ifdef CONFIG_FB_TILEBLITTING
307 #define FB_TILE_CURSOR_NONE 0
308 #define FB_TILE_CURSOR_UNDERLINE 1
309 #define FB_TILE_CURSOR_LOWER_THIRD 2
310 #define FB_TILE_CURSOR_LOWER_HALF 3
311 #define FB_TILE_CURSOR_TWO_THIRDS 4
312 #define FB_TILE_CURSOR_BLOCK 5
313
314 struct fb_tilemap {
315 __u32 width; /* width of each tile in pixels */
316 __u32 height; /* height of each tile in scanlines */
317 __u32 depth; /* color depth of each tile */
318 __u32 length; /* number of tiles in the map */
319 const __u8 *data; /* actual tile map: a bitmap array, packed
320 to the nearest byte */
321 };
322
323 struct fb_tilerect {
324 __u32 sx; /* origin in the x-axis */
325 __u32 sy; /* origin in the y-axis */
326 __u32 width; /* number of tiles in the x-axis */
327 __u32 height; /* number of tiles in the y-axis */
328 __u32 index; /* what tile to use: index to tile map */
329 __u32 fg; /* foreground color */
330 __u32 bg; /* background color */
331 __u32 rop; /* raster operation */
332 };
333
334 struct fb_tilearea {
335 __u32 sx; /* source origin in the x-axis */
336 __u32 sy; /* source origin in the y-axis */
337 __u32 dx; /* destination origin in the x-axis */
338 __u32 dy; /* destination origin in the y-axis */
339 __u32 width; /* number of tiles in the x-axis */
340 __u32 height; /* number of tiles in the y-axis */
341 };
342
343 struct fb_tileblit {
344 __u32 sx; /* origin in the x-axis */
345 __u32 sy; /* origin in the y-axis */
346 __u32 width; /* number of tiles in the x-axis */
347 __u32 height; /* number of tiles in the y-axis */
348 __u32 fg; /* foreground color */
349 __u32 bg; /* background color */
350 __u32 length; /* number of tiles to draw */
351 __u32 *indices; /* array of indices to tile map */
352 };
353
354 struct fb_tilecursor {
355 __u32 sx; /* cursor position in the x-axis */
356 __u32 sy; /* cursor position in the y-axis */
357 __u32 mode; /* 0 = erase, 1 = draw */
358 __u32 shape; /* see FB_TILE_CURSOR_* */
359 __u32 fg; /* foreground color */
360 __u32 bg; /* background color */
361 };
362
363 struct fb_tile_ops {
364 /* set tile characteristics */
365 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
366
367 /* all dimensions from hereon are in terms of tiles */
368
369 /* move a rectangular region of tiles from one area to another*/
370 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
371 /* fill a rectangular region with a tile */
372 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
373 /* copy an array of tiles */
374 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
375 /* cursor */
376 void (*fb_tilecursor)(struct fb_info *info,
377 struct fb_tilecursor *cursor);
378 /* get maximum length of the tile map */
379 int (*fb_get_tilemax)(struct fb_info *info);
380 };
381 #endif /* CONFIG_FB_TILEBLITTING */
382
383 /* FBINFO_* = fb_info.flags bit flags */
384 #define FBINFO_DEFAULT 0
385 #define FBINFO_HWACCEL_DISABLED 0x0002
386 /* When FBINFO_HWACCEL_DISABLED is set:
387 * Hardware acceleration is turned off. Software implementations
388 * of required functions (copyarea(), fillrect(), and imageblit())
389 * takes over; acceleration engine should be in a quiescent state */
390
391 /* hints */
392 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
393 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
394 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
395
396 /* hardware supported ops */
397 /* semantics: when a bit is set, it indicates that the operation is
398 * accelerated by hardware.
399 * required functions will still work even if the bit is not set.
400 * optional functions may not even exist if the flag bit is not set.
401 */
402 #define FBINFO_HWACCEL_NONE 0x0000
403 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
404 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
405 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
406 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
407 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
408 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
409 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
410
411 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
412
413 /* A driver may set this flag to indicate that it does want a set_par to be
414 * called every time when fbcon_switch is executed. The advantage is that with
415 * this flag set you can really be sure that set_par is always called before
416 * any of the functions dependent on the correct hardware state or altering
417 * that state, even if you are using some broken X releases. The disadvantage
418 * is that it introduces unwanted delays to every console switch if set_par
419 * is slow. It is a good idea to try this flag in the drivers initialization
420 * code whenever there is a bug report related to switching between X and the
421 * framebuffer console.
422 */
423 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000
424
425 /*
426 * Host and GPU endianness differ.
427 */
428 #define FBINFO_FOREIGN_ENDIAN 0x100000
429 /*
430 * Big endian math. This is the same flags as above, but with different
431 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
432 * and host endianness. Drivers should not use this flag.
433 */
434 #define FBINFO_BE_MATH 0x100000
435 /*
436 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
437 * drivers to stop userspace from trying to share buffers behind the kernel's
438 * back. Instead dma-buf based buffer sharing should be used.
439 */
440 #define FBINFO_HIDE_SMEM_START 0x200000
441
442
443 struct fb_info {
444 refcount_t count;
445 int node;
446 int flags;
447 /*
448 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
449 * a lcd is not mounted upright and fbcon should rotate to compensate.
450 */
451 int fbcon_rotate_hint;
452 struct mutex lock; /* Lock for open/release/ioctl funcs */
453 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
454 struct fb_var_screeninfo var; /* Current var */
455 struct fb_fix_screeninfo fix; /* Current fix */
456 struct fb_monspecs monspecs; /* Current Monitor specs */
457 struct fb_pixmap pixmap; /* Image hardware mapper */
458 struct fb_pixmap sprite; /* Cursor hardware mapper */
459 struct fb_cmap cmap; /* Current cmap */
460 struct list_head modelist; /* mode list */
461 struct fb_videomode *mode; /* current mode */
462
463 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
464 /* assigned backlight device */
465 /* set before framebuffer registration,
466 remove after unregister */
467 struct backlight_device *bl_dev;
468
469 /* Backlight level curve */
470 struct mutex bl_curve_mutex;
471 u8 bl_curve[FB_BACKLIGHT_LEVELS];
472 #endif
473 #ifdef CONFIG_FB_DEFERRED_IO
474 struct delayed_work deferred_work;
475 unsigned long npagerefs;
476 struct fb_deferred_io_pageref *pagerefs;
477 struct fb_deferred_io *fbdefio;
478 #endif
479
480 const struct fb_ops *fbops;
481 struct device *device; /* This is the parent */
482 struct device *dev; /* This is this fb device */
483 int class_flag; /* private sysfs flags */
484 #ifdef CONFIG_FB_TILEBLITTING
485 struct fb_tile_ops *tileops; /* Tile Blitting */
486 #endif
487 union {
488 char __iomem *screen_base; /* Virtual address */
489 char *screen_buffer;
490 };
491 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
492 void *pseudo_palette; /* Fake palette of 16 colors */
493 #define FBINFO_STATE_RUNNING 0
494 #define FBINFO_STATE_SUSPENDED 1
495 u32 state; /* Hardware state i.e suspend */
496 void *fbcon_par; /* fbcon use-only private area */
497 /* From here on everything is device dependent */
498 void *par;
499
500 bool skip_vt_switch; /* no VT switch on suspend/resume required */
501 };
502
503 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
504
505 /* This will go away
506 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
507 * when it wants to turn the acceleration engine on. This is
508 * really a separate operation, and should be modified via sysfs.
509 * But for now, we leave it broken with the following define
510 */
511 #define STUPID_ACCELF_TEXT_SHIT
512
513 // This will go away
514 #if defined(__sparc__)
515
516 /* We map all of our framebuffers such that big-endian accesses
517 * are what we want, so the following is sufficient.
518 */
519
520 // This will go away
521 #define fb_readb sbus_readb
522 #define fb_readw sbus_readw
523 #define fb_readl sbus_readl
524 #define fb_readq sbus_readq
525 #define fb_writeb sbus_writeb
526 #define fb_writew sbus_writew
527 #define fb_writel sbus_writel
528 #define fb_writeq sbus_writeq
529 #define fb_memset sbus_memset_io
530 #define fb_memcpy_fromfb sbus_memcpy_fromio
531 #define fb_memcpy_tofb sbus_memcpy_toio
532
533 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
534 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
535 defined(__arm__) || defined(__aarch64__) || defined(__mips__)
536
537 #define fb_readb __raw_readb
538 #define fb_readw __raw_readw
539 #define fb_readl __raw_readl
540 #define fb_readq __raw_readq
541 #define fb_writeb __raw_writeb
542 #define fb_writew __raw_writew
543 #define fb_writel __raw_writel
544 #define fb_writeq __raw_writeq
545 #define fb_memset memset_io
546 #define fb_memcpy_fromfb memcpy_fromio
547 #define fb_memcpy_tofb memcpy_toio
548
549 #else
550
551 #define fb_readb(addr) (*(volatile u8 *) (addr))
552 #define fb_readw(addr) (*(volatile u16 *) (addr))
553 #define fb_readl(addr) (*(volatile u32 *) (addr))
554 #define fb_readq(addr) (*(volatile u64 *) (addr))
555 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
556 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
557 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
558 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
559 #define fb_memset memset
560 #define fb_memcpy_fromfb memcpy
561 #define fb_memcpy_tofb memcpy
562
563 #endif
564
565 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
566 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
567 (val) << (bits))
568 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
569 (val) >> (bits))
570
571 /*
572 * `Generic' versions of the frame buffer device operations
573 */
574
575 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
576 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
577 extern int fb_blank(struct fb_info *info, int blank);
578 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
579 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
580 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
581 /*
582 * Drawing operations where framebuffer is in system RAM
583 */
584 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
585 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
586 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
587 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
588 size_t count, loff_t *ppos);
589 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
590 size_t count, loff_t *ppos);
591
592 /* drivers/video/fbmem.c */
593 extern int register_framebuffer(struct fb_info *fb_info);
594 extern void unregister_framebuffer(struct fb_info *fb_info);
595 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
596 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
597 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
598 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
599 u32 height, u32 shift_high, u32 shift_low, u32 mod);
600 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
601 extern void fb_set_suspend(struct fb_info *info, int state);
602 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
603 struct fb_fix_screeninfo *fix);
604 extern int fb_get_options(const char *name, char **option);
605 extern int fb_new_modelist(struct fb_info *info);
606
607 extern bool fb_center_logo;
608 extern int fb_logo_count;
609 extern struct class *fb_class;
610
lock_fb_info(struct fb_info * info)611 static inline void lock_fb_info(struct fb_info *info)
612 {
613 mutex_lock(&info->lock);
614 }
615
unlock_fb_info(struct fb_info * info)616 static inline void unlock_fb_info(struct fb_info *info)
617 {
618 mutex_unlock(&info->lock);
619 }
620
__fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)621 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
622 u8 *src, u32 s_pitch, u32 height)
623 {
624 u32 i, j;
625
626 d_pitch -= s_pitch;
627
628 for (i = height; i--; ) {
629 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
630 for (j = 0; j < s_pitch; j++)
631 *dst++ = *src++;
632 dst += d_pitch;
633 }
634 }
635
636 /* drivers/video/fb_defio.c */
637 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
638 extern int fb_deferred_io_init(struct fb_info *info);
639 extern void fb_deferred_io_open(struct fb_info *info,
640 struct inode *inode,
641 struct file *file);
642 extern void fb_deferred_io_release(struct fb_info *info);
643 extern void fb_deferred_io_cleanup(struct fb_info *info);
644 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
645 loff_t end, int datasync);
646
fb_be_math(struct fb_info * info)647 static inline bool fb_be_math(struct fb_info *info)
648 {
649 #ifdef CONFIG_FB_FOREIGN_ENDIAN
650 #if defined(CONFIG_FB_BOTH_ENDIAN)
651 return info->flags & FBINFO_BE_MATH;
652 #elif defined(CONFIG_FB_BIG_ENDIAN)
653 return true;
654 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
655 return false;
656 #endif /* CONFIG_FB_BOTH_ENDIAN */
657 #else
658 #ifdef __BIG_ENDIAN
659 return true;
660 #else
661 return false;
662 #endif /* __BIG_ENDIAN */
663 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
664 }
665
666 /* drivers/video/fbsysfs.c */
667 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
668 extern void framebuffer_release(struct fb_info *info);
669 extern int fb_init_device(struct fb_info *fb_info);
670 extern void fb_cleanup_device(struct fb_info *head);
671 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
672
673 /* drivers/video/fbmon.c */
674 #define FB_MAXTIMINGS 0
675 #define FB_VSYNCTIMINGS 1
676 #define FB_HSYNCTIMINGS 2
677 #define FB_DCLKTIMINGS 3
678 #define FB_IGNOREMON 0x100
679
680 #define FB_MODE_IS_UNKNOWN 0
681 #define FB_MODE_IS_DETAILED 1
682 #define FB_MODE_IS_STANDARD 2
683 #define FB_MODE_IS_VESA 4
684 #define FB_MODE_IS_CALCULATED 8
685 #define FB_MODE_IS_FIRST 16
686 #define FB_MODE_IS_FROM_VAR 32
687
688 extern int fbmon_dpms(const struct fb_info *fb_info);
689 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
690 struct fb_info *info);
691 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
692 struct fb_info *info);
693 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
694 extern const unsigned char *fb_firmware_edid(struct device *device);
695 extern void fb_edid_to_monspecs(unsigned char *edid,
696 struct fb_monspecs *specs);
697 extern void fb_destroy_modedb(struct fb_videomode *modedb);
698 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
699 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
700
701 extern int of_get_fb_videomode(struct device_node *np,
702 struct fb_videomode *fb,
703 int index);
704 extern int fb_videomode_from_videomode(const struct videomode *vm,
705 struct fb_videomode *fbmode);
706
707 /* drivers/video/modedb.c */
708 #define VESA_MODEDB_SIZE 43
709 #define DMT_SIZE 0x50
710
711 extern void fb_var_to_videomode(struct fb_videomode *mode,
712 const struct fb_var_screeninfo *var);
713 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
714 const struct fb_videomode *mode);
715 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
716 const struct fb_videomode *mode2);
717 extern int fb_add_videomode(const struct fb_videomode *mode,
718 struct list_head *head);
719 extern void fb_delete_videomode(const struct fb_videomode *mode,
720 struct list_head *head);
721 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
722 struct list_head *head);
723 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
724 struct list_head *head);
725 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
726 struct list_head *head);
727 extern void fb_destroy_modelist(struct list_head *head);
728 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
729 struct list_head *head);
730 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
731 struct list_head *head);
732
733 /* drivers/video/fbcmap.c */
734 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
735 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
736 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
737 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
738 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
739 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
740 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
741 extern const struct fb_cmap *fb_default_cmap(int len);
742 extern void fb_invert_cmaps(void);
743
744 struct fb_videomode {
745 const char *name; /* optional */
746 u32 refresh; /* optional */
747 u32 xres;
748 u32 yres;
749 u32 pixclock;
750 u32 left_margin;
751 u32 right_margin;
752 u32 upper_margin;
753 u32 lower_margin;
754 u32 hsync_len;
755 u32 vsync_len;
756 u32 sync;
757 u32 vmode;
758 u32 flag;
759 };
760
761 struct dmt_videomode {
762 u32 dmt_id;
763 u32 std_2byte_code;
764 u32 cvt_3byte_code;
765 const struct fb_videomode *mode;
766 };
767
768 extern const char *fb_mode_option;
769 extern const struct fb_videomode vesa_modes[];
770 extern const struct dmt_videomode dmt_modes[];
771
772 struct fb_modelist {
773 struct list_head list;
774 struct fb_videomode mode;
775 };
776
777 extern int fb_find_mode(struct fb_var_screeninfo *var,
778 struct fb_info *info, const char *mode_option,
779 const struct fb_videomode *db,
780 unsigned int dbsize,
781 const struct fb_videomode *default_mode,
782 unsigned int default_bpp);
783
784 #if defined(CONFIG_VIDEO_NOMODESET)
785 bool fb_modesetting_disabled(const char *drvname);
786 #else
fb_modesetting_disabled(const char * drvname)787 static inline bool fb_modesetting_disabled(const char *drvname)
788 {
789 return false;
790 }
791 #endif
792
793 /* Convenience logging macros */
794 #define fb_err(fb_info, fmt, ...) \
795 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
796 #define fb_notice(info, fmt, ...) \
797 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
798 #define fb_warn(fb_info, fmt, ...) \
799 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
800 #define fb_info(fb_info, fmt, ...) \
801 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
802 #define fb_dbg(fb_info, fmt, ...) \
803 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
804
805 #endif /* _LINUX_FB_H */
806