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
19 #include <asm/fb.h>
20
21 struct vm_area_struct;
22 struct fb_info;
23 struct device;
24 struct file;
25 struct videomode;
26 struct device_node;
27
28 /* Definitions below are used in the parsed monitor specs */
29 #define FB_DPMS_ACTIVE_OFF 1
30 #define FB_DPMS_SUSPEND 2
31 #define FB_DPMS_STANDBY 4
32
33 #define FB_DISP_DDI 1
34 #define FB_DISP_ANA_700_300 2
35 #define FB_DISP_ANA_714_286 4
36 #define FB_DISP_ANA_1000_400 8
37 #define FB_DISP_ANA_700_000 16
38
39 #define FB_DISP_MONO 32
40 #define FB_DISP_RGB 64
41 #define FB_DISP_MULTI 128
42 #define FB_DISP_UNKNOWN 256
43
44 #define FB_SIGNAL_NONE 0
45 #define FB_SIGNAL_BLANK_BLANK 1
46 #define FB_SIGNAL_SEPARATE 2
47 #define FB_SIGNAL_COMPOSITE 4
48 #define FB_SIGNAL_SYNC_ON_GREEN 8
49 #define FB_SIGNAL_SERRATION_ON 16
50
51 #define FB_MISC_PRIM_COLOR 1
52 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
53 #define FB_MISC_HDMI 4
54 struct fb_chroma {
55 __u32 redx; /* in fraction of 1024 */
56 __u32 greenx;
57 __u32 bluex;
58 __u32 whitex;
59 __u32 redy;
60 __u32 greeny;
61 __u32 bluey;
62 __u32 whitey;
63 };
64
65 struct fb_monspecs {
66 struct fb_chroma chroma;
67 struct fb_videomode *modedb; /* mode database */
68 __u8 manufacturer[4]; /* Manufacturer */
69 __u8 monitor[14]; /* Monitor String */
70 __u8 serial_no[14]; /* Serial Number */
71 __u8 ascii[14]; /* ? */
72 __u32 modedb_len; /* mode database length */
73 __u32 model; /* Monitor Model */
74 __u32 serial; /* Serial Number - Integer */
75 __u32 year; /* Year manufactured */
76 __u32 week; /* Week Manufactured */
77 __u32 hfmin; /* hfreq lower limit (Hz) */
78 __u32 hfmax; /* hfreq upper limit (Hz) */
79 __u32 dclkmin; /* pixelclock lower limit (Hz) */
80 __u32 dclkmax; /* pixelclock upper limit (Hz) */
81 __u16 input; /* display type - see FB_DISP_* */
82 __u16 dpms; /* DPMS support - see FB_DPMS_ */
83 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
84 __u16 vfmin; /* vfreq lower limit (Hz) */
85 __u16 vfmax; /* vfreq upper limit (Hz) */
86 __u16 gamma; /* Gamma - in fractions of 100 */
87 __u16 gtf : 1; /* supports GTF */
88 __u16 misc; /* Misc flags - see FB_MISC_* */
89 __u8 version; /* EDID version... */
90 __u8 revision; /* ...and revision */
91 __u8 max_x; /* Maximum horizontal size (cm) */
92 __u8 max_y; /* Maximum vertical size (cm) */
93 };
94
95 struct fb_cmap_user {
96 __u32 start; /* First entry */
97 __u32 len; /* Number of entries */
98 __u16 __user *red; /* Red values */
99 __u16 __user *green;
100 __u16 __user *blue;
101 __u16 __user *transp; /* transparency, can be NULL */
102 };
103
104 struct fb_image_user {
105 __u32 dx; /* Where to place image */
106 __u32 dy;
107 __u32 width; /* Size of image */
108 __u32 height;
109 __u32 fg_color; /* Only used when a mono bitmap */
110 __u32 bg_color;
111 __u8 depth; /* Depth of the image */
112 const char __user *data; /* Pointer to image data */
113 struct fb_cmap_user cmap; /* color map info */
114 };
115
116 struct fb_cursor_user {
117 __u16 set; /* what to set */
118 __u16 enable; /* cursor on/off */
119 __u16 rop; /* bitop operation */
120 const char __user *mask; /* cursor mask bits */
121 struct fbcurpos hot; /* cursor hot spot */
122 struct fb_image_user image; /* Cursor image */
123 };
124
125 /*
126 * Register/unregister for framebuffer events
127 */
128
129 /* The resolution of the passed in fb_info about to change */
130 #define FB_EVENT_MODE_CHANGE 0x01
131
132 #ifdef CONFIG_GUMSTIX_AM200EPD
133 /* only used by mach-pxa/am200epd.c */
134 #define FB_EVENT_FB_REGISTERED 0x05
135 #define FB_EVENT_FB_UNREGISTERED 0x06
136 #endif
137
138 /* A display blank is requested */
139 #define FB_EVENT_BLANK 0x09
140
141 struct fb_event {
142 struct fb_info *info;
143 void *data;
144 };
145
146 struct fb_blit_caps {
147 u32 x;
148 u32 y;
149 u32 len;
150 u32 flags;
151 };
152
153 #ifdef CONFIG_FB_NOTIFY
154 extern int fb_register_client(struct notifier_block *nb);
155 extern int fb_unregister_client(struct notifier_block *nb);
156 extern int fb_notifier_call_chain(unsigned long val, void *v);
157 #else
fb_register_client(struct notifier_block * nb)158 static inline int fb_register_client(struct notifier_block *nb)
159 {
160 return 0;
161 };
162
fb_unregister_client(struct notifier_block * nb)163 static inline int fb_unregister_client(struct notifier_block *nb)
164 {
165 return 0;
166 };
167
fb_notifier_call_chain(unsigned long val,void * v)168 static inline int fb_notifier_call_chain(unsigned long val, void *v)
169 {
170 return 0;
171 };
172 #endif
173
174 /*
175 * Pixmap structure definition
176 *
177 * The purpose of this structure is to translate data
178 * from the hardware independent format of fbdev to what
179 * format the hardware needs.
180 */
181
182 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
183 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
184 #define FB_PIXMAP_IO 4 /* memory is iomapped */
185 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
186
187 struct fb_pixmap {
188 u8 *addr; /* pointer to memory */
189 u32 size; /* size of buffer in bytes */
190 u32 offset; /* current offset to buffer */
191 u32 buf_align; /* byte alignment of each bitmap */
192 u32 scan_align; /* alignment per scanline */
193 u32 access_align; /* alignment per read/write (bits) */
194 u32 flags; /* see FB_PIXMAP_* */
195 u32 blit_x; /* supported bit block dimensions (1-32)*/
196 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
197 /* blit_y = 1 << (height - 1) */
198 /* if 0, will be set to 0xffffffff (all)*/
199 /* access methods */
200 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
201 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
202 };
203
204 #ifdef CONFIG_FB_DEFERRED_IO
205 struct fb_deferred_io_pageref {
206 struct page *page;
207 unsigned long offset;
208 /* private */
209 struct list_head list;
210 };
211
212 struct fb_deferred_io {
213 /* delay between mkwrite and deferred handler */
214 unsigned long delay;
215 bool sort_pagereflist; /* sort pagelist by offset */
216 int open_count; /* number of opened files; protected by fb_info lock */
217 struct mutex lock; /* mutex that protects the pageref list */
218 struct list_head pagereflist; /* list of pagerefs for touched pages */
219 /* callback */
220 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
221 };
222 #endif
223
224 /*
225 * Frame buffer operations
226 *
227 * LOCKING NOTE: those functions must _ALL_ be called with the console
228 * semaphore held, this is the only suitable locking mechanism we have
229 * in 2.6. Some may be called at interrupt time at this point though.
230 *
231 * The exception to this is the debug related hooks. Putting the fb
232 * into a debug state (e.g. flipping to the kernel console) and restoring
233 * it must be done in a lock-free manner, so low level drivers should
234 * keep track of the initial console (if applicable) and may need to
235 * perform direct, unlocked hardware writes in these hooks.
236 */
237
238 struct fb_ops {
239 /* open/release and usage marking */
240 struct module *owner;
241 int (*fb_open)(struct fb_info *info, int user);
242 int (*fb_release)(struct fb_info *info, int user);
243
244 /* For framebuffers with strange non linear layouts or that do not
245 * work with normal memory mapped access
246 */
247 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
248 size_t count, loff_t *ppos);
249 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
250 size_t count, loff_t *ppos);
251
252 /* checks var and eventually tweaks it to something supported,
253 * DO NOT MODIFY PAR */
254 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
255
256 /* set the video mode according to info->var */
257 int (*fb_set_par)(struct fb_info *info);
258
259 /* set color register */
260 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
261 unsigned blue, unsigned transp, struct fb_info *info);
262
263 /* set color registers in batch */
264 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
265
266 /* blank display */
267 int (*fb_blank)(int blank, struct fb_info *info);
268
269 /* pan display */
270 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
271
272 /* Draws a rectangle */
273 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
274 /* Copy data from area to another */
275 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
276 /* Draws a image to the display */
277 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
278
279 /* Draws cursor */
280 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
281
282 /* wait for blit idle, optional */
283 int (*fb_sync)(struct fb_info *info);
284
285 /* perform fb specific ioctl (optional) */
286 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
287 unsigned long arg);
288
289 /* Handle 32bit compat ioctl (optional) */
290 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
291 unsigned long arg);
292
293 /* perform fb specific mmap */
294 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
295
296 /* get capability given var */
297 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
298 struct fb_var_screeninfo *var);
299
300 /* teardown any resources to do with this framebuffer */
301 void (*fb_destroy)(struct fb_info *info);
302
303 /* called at KDB enter and leave time to prepare the console */
304 int (*fb_debug_enter)(struct fb_info *info);
305 int (*fb_debug_leave)(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
316 struct 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
325 struct 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
336 struct 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
345 struct 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
356 struct 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
365 struct 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
444 struct 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 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
465 /* assigned backlight device */
466 /* set before framebuffer registration,
467 remove after unregister */
468 struct backlight_device *bl_dev;
469
470 /* Backlight level curve */
471 struct mutex bl_curve_mutex;
472 u8 bl_curve[FB_BACKLIGHT_LEVELS];
473 #endif
474 #ifdef CONFIG_FB_DEFERRED_IO
475 struct delayed_work deferred_work;
476 unsigned long npagerefs;
477 struct fb_deferred_io_pageref *pagerefs;
478 struct fb_deferred_io *fbdefio;
479 #endif
480
481 const struct fb_ops *fbops;
482 struct device *device; /* This is the parent */
483 #if defined(CONFIG_FB_DEVICE)
484 struct device *dev; /* This is this fb device */
485 #endif
486 int class_flag; /* private sysfs flags */
487 #ifdef CONFIG_FB_TILEBLITTING
488 struct fb_tile_ops *tileops; /* Tile Blitting */
489 #endif
490 union {
491 char __iomem *screen_base; /* Virtual address */
492 char *screen_buffer;
493 };
494 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
495 void *pseudo_palette; /* Fake palette of 16 colors */
496 #define FBINFO_STATE_RUNNING 0
497 #define FBINFO_STATE_SUSPENDED 1
498 u32 state; /* Hardware state i.e suspend */
499 void *fbcon_par; /* fbcon use-only private area */
500 /* From here on everything is device dependent */
501 void *par;
502
503 bool skip_vt_switch; /* no VT switch on suspend/resume required */
504 };
505
506 /* This will go away
507 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
508 * when it wants to turn the acceleration engine on. This is
509 * really a separate operation, and should be modified via sysfs.
510 * But for now, we leave it broken with the following define
511 */
512 #define STUPID_ACCELF_TEXT_SHIT
513
514 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
515 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
516 (val) << (bits))
517 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
518 (val) >> (bits))
519
520 /*
521 * `Generic' versions of the frame buffer device operations
522 */
523
524 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
525 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
526 extern int fb_blank(struct fb_info *info, int blank);
527
528 /*
529 * Helpers for framebuffers in I/O memory
530 */
531
532 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
533 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
534 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
535 extern ssize_t fb_io_read(struct fb_info *info, char __user *buf,
536 size_t count, loff_t *ppos);
537 extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf,
538 size_t count, loff_t *ppos);
539
540 #define __FB_DEFAULT_IOMEM_OPS_RDWR \
541 .fb_read = fb_io_read, \
542 .fb_write = fb_io_write
543
544 #define __FB_DEFAULT_IOMEM_OPS_DRAW \
545 .fb_fillrect = cfb_fillrect, \
546 .fb_copyarea = cfb_copyarea, \
547 .fb_imageblit = cfb_imageblit
548
549 #define __FB_DEFAULT_IOMEM_OPS_MMAP \
550 .fb_mmap = NULL /* default implementation */
551
552 #define FB_DEFAULT_IOMEM_OPS \
553 __FB_DEFAULT_IOMEM_OPS_RDWR, \
554 __FB_DEFAULT_IOMEM_OPS_DRAW, \
555 __FB_DEFAULT_IOMEM_OPS_MMAP
556
557 /*
558 * Helpers for framebuffers in system memory
559 */
560
561 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
562 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
563 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
564 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
565 size_t count, loff_t *ppos);
566 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
567 size_t count, loff_t *ppos);
568
569 #define __FB_DEFAULT_SYSMEM_OPS_RDWR \
570 .fb_read = fb_sys_read, \
571 .fb_write = fb_sys_write
572
573 #define __FB_DEFAULT_SYSMEM_OPS_DRAW \
574 .fb_fillrect = sys_fillrect, \
575 .fb_copyarea = sys_copyarea, \
576 .fb_imageblit = sys_imageblit
577
578 /*
579 * Helpers for framebuffers in DMA-able memory
580 */
581
582 #define __FB_DEFAULT_DMAMEM_OPS_RDWR \
583 .fb_read = fb_sys_read, \
584 .fb_write = fb_sys_write
585
586 #define __FB_DEFAULT_DMAMEM_OPS_DRAW \
587 .fb_fillrect = sys_fillrect, \
588 .fb_copyarea = sys_copyarea, \
589 .fb_imageblit = sys_imageblit
590
591 /* fbmem.c */
592 extern int register_framebuffer(struct fb_info *fb_info);
593 extern void unregister_framebuffer(struct fb_info *fb_info);
594 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
595 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
596 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
597 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
598 u32 height, u32 shift_high, u32 shift_low, u32 mod);
599 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
600 extern void fb_set_suspend(struct fb_info *info, int state);
601 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
602 struct fb_fix_screeninfo *fix);
603 extern int fb_get_options(const char *name, char **option);
604 extern int fb_new_modelist(struct fb_info *info);
605
606 extern bool fb_center_logo;
607 extern int fb_logo_count;
608
lock_fb_info(struct fb_info * info)609 static inline void lock_fb_info(struct fb_info *info)
610 {
611 mutex_lock(&info->lock);
612 }
613
unlock_fb_info(struct fb_info * info)614 static inline void unlock_fb_info(struct fb_info *info)
615 {
616 mutex_unlock(&info->lock);
617 }
618
__fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)619 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
620 u8 *src, u32 s_pitch, u32 height)
621 {
622 u32 i, j;
623
624 d_pitch -= s_pitch;
625
626 for (i = height; i--; ) {
627 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
628 for (j = 0; j < s_pitch; j++)
629 *dst++ = *src++;
630 dst += d_pitch;
631 }
632 }
633
634 /* fb_defio.c */
635 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
636 extern int fb_deferred_io_init(struct fb_info *info);
637 extern void fb_deferred_io_open(struct fb_info *info,
638 struct inode *inode,
639 struct file *file);
640 extern void fb_deferred_io_release(struct fb_info *info);
641 extern void fb_deferred_io_cleanup(struct fb_info *info);
642 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
643 loff_t end, int datasync);
644
645 /*
646 * Generate callbacks for deferred I/O
647 */
648
649 #define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \
650 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \
651 size_t count, loff_t *ppos) \
652 { \
653 return fb_ ## __mode ## _read(info, buf, count, ppos); \
654 } \
655 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \
656 size_t count, loff_t *ppos) \
657 { \
658 unsigned long offset = *ppos; \
659 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \
660 if (ret > 0) \
661 __damage_range(info, offset, ret); \
662 return ret; \
663 }
664
665 #define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \
666 static void __prefix ## _defio_fillrect(struct fb_info *info, \
667 const struct fb_fillrect *rect) \
668 { \
669 __mode ## _fillrect(info, rect); \
670 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \
671 } \
672 static void __prefix ## _defio_copyarea(struct fb_info *info, \
673 const struct fb_copyarea *area) \
674 { \
675 __mode ## _copyarea(info, area); \
676 __damage_area(info, area->dx, area->dy, area->width, area->height); \
677 } \
678 static void __prefix ## _defio_imageblit(struct fb_info *info, \
679 const struct fb_image *image) \
680 { \
681 __mode ## _imageblit(info, image); \
682 __damage_area(info, image->dx, image->dy, image->width, image->height); \
683 }
684
685 #define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \
686 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \
687 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb)
688
689 #define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \
690 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
691 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
692
693 #define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \
694 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
695 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
696
697 /*
698 * Initializes struct fb_ops for deferred I/O.
699 */
700
701 #define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \
702 .fb_read = __prefix ## _defio_read, \
703 .fb_write = __prefix ## _defio_write
704
705 #define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \
706 .fb_fillrect = __prefix ## _defio_fillrect, \
707 .fb_copyarea = __prefix ## _defio_copyarea, \
708 .fb_imageblit = __prefix ## _defio_imageblit
709
710 #define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \
711 .fb_mmap = fb_deferred_io_mmap
712
713 #define FB_DEFAULT_DEFERRED_OPS(__prefix) \
714 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \
715 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \
716 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix)
717
fb_be_math(struct fb_info * info)718 static inline bool fb_be_math(struct fb_info *info)
719 {
720 #ifdef CONFIG_FB_FOREIGN_ENDIAN
721 #if defined(CONFIG_FB_BOTH_ENDIAN)
722 return info->flags & FBINFO_BE_MATH;
723 #elif defined(CONFIG_FB_BIG_ENDIAN)
724 return true;
725 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
726 return false;
727 #endif /* CONFIG_FB_BOTH_ENDIAN */
728 #else
729 #ifdef __BIG_ENDIAN
730 return true;
731 #else
732 return false;
733 #endif /* __BIG_ENDIAN */
734 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
735 }
736
737 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
738 extern void framebuffer_release(struct fb_info *info);
739 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
740
741 /* fbmon.c */
742 #define FB_MAXTIMINGS 0
743 #define FB_VSYNCTIMINGS 1
744 #define FB_HSYNCTIMINGS 2
745 #define FB_DCLKTIMINGS 3
746 #define FB_IGNOREMON 0x100
747
748 #define FB_MODE_IS_UNKNOWN 0
749 #define FB_MODE_IS_DETAILED 1
750 #define FB_MODE_IS_STANDARD 2
751 #define FB_MODE_IS_VESA 4
752 #define FB_MODE_IS_CALCULATED 8
753 #define FB_MODE_IS_FIRST 16
754 #define FB_MODE_IS_FROM_VAR 32
755
756 extern int fbmon_dpms(const struct fb_info *fb_info);
757 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
758 struct fb_info *info);
759 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
760 struct fb_info *info);
761 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
762 extern const unsigned char *fb_firmware_edid(struct device *device);
763 extern void fb_edid_to_monspecs(unsigned char *edid,
764 struct fb_monspecs *specs);
765 extern void fb_destroy_modedb(struct fb_videomode *modedb);
766 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
767 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
768
769 extern int of_get_fb_videomode(struct device_node *np,
770 struct fb_videomode *fb,
771 int index);
772 extern int fb_videomode_from_videomode(const struct videomode *vm,
773 struct fb_videomode *fbmode);
774
775 /* modedb.c */
776 #define VESA_MODEDB_SIZE 43
777 #define DMT_SIZE 0x50
778
779 extern void fb_var_to_videomode(struct fb_videomode *mode,
780 const struct fb_var_screeninfo *var);
781 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
782 const struct fb_videomode *mode);
783 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
784 const struct fb_videomode *mode2);
785 extern int fb_add_videomode(const struct fb_videomode *mode,
786 struct list_head *head);
787 extern void fb_delete_videomode(const struct fb_videomode *mode,
788 struct list_head *head);
789 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
790 struct list_head *head);
791 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
792 struct list_head *head);
793 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
794 struct list_head *head);
795 extern void fb_destroy_modelist(struct list_head *head);
796 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
797 struct list_head *head);
798 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
799 struct list_head *head);
800
801 /* fbcmap.c */
802 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
803 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
804 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
805 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
806 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
807 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
808 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
809 extern const struct fb_cmap *fb_default_cmap(int len);
810 extern void fb_invert_cmaps(void);
811
812 struct fb_videomode {
813 const char *name; /* optional */
814 u32 refresh; /* optional */
815 u32 xres;
816 u32 yres;
817 u32 pixclock;
818 u32 left_margin;
819 u32 right_margin;
820 u32 upper_margin;
821 u32 lower_margin;
822 u32 hsync_len;
823 u32 vsync_len;
824 u32 sync;
825 u32 vmode;
826 u32 flag;
827 };
828
829 struct dmt_videomode {
830 u32 dmt_id;
831 u32 std_2byte_code;
832 u32 cvt_3byte_code;
833 const struct fb_videomode *mode;
834 };
835
836 extern const struct fb_videomode vesa_modes[];
837 extern const struct dmt_videomode dmt_modes[];
838
839 struct fb_modelist {
840 struct list_head list;
841 struct fb_videomode mode;
842 };
843
844 extern int fb_find_mode(struct fb_var_screeninfo *var,
845 struct fb_info *info, const char *mode_option,
846 const struct fb_videomode *db,
847 unsigned int dbsize,
848 const struct fb_videomode *default_mode,
849 unsigned int default_bpp);
850
851 #if defined(CONFIG_VIDEO_NOMODESET)
852 bool fb_modesetting_disabled(const char *drvname);
853 #else
fb_modesetting_disabled(const char * drvname)854 static inline bool fb_modesetting_disabled(const char *drvname)
855 {
856 return false;
857 }
858 #endif
859
860 /* Convenience logging macros */
861 #define fb_err(fb_info, fmt, ...) \
862 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
863 #define fb_notice(info, fmt, ...) \
864 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
865 #define fb_warn(fb_info, fmt, ...) \
866 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
867 #define fb_info(fb_info, fmt, ...) \
868 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
869 #define fb_dbg(fb_info, fmt, ...) \
870 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
871
872 #endif /* _LINUX_FB_H */
873