Line data Source code
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
158 : static inline int fb_register_client(struct notifier_block *nb)
159 : {
160 : return 0;
161 : };
162 :
163 : static inline int fb_unregister_client(struct notifier_block *nb)
164 : {
165 : return 0;
166 : };
167 :
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 : /* drivers/video/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 :
609 : static inline void lock_fb_info(struct fb_info *info)
610 : {
611 0 : mutex_lock(&info->lock);
612 : }
613 :
614 : static inline void unlock_fb_info(struct fb_info *info)
615 : {
616 0 : mutex_unlock(&info->lock);
617 : }
618 :
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 0 : d_pitch -= s_pitch;
625 :
626 0 : for (i = height; i--; ) {
627 : /* s_pitch is a few bytes at the most, memcpy is suboptimal */
628 0 : for (j = 0; j < s_pitch; j++)
629 0 : *dst++ = *src++;
630 0 : dst += d_pitch;
631 : }
632 : }
633 :
634 : /* drivers/video/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 : /*
694 : * Initializes struct fb_ops for deferred I/O.
695 : */
696 :
697 : #define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \
698 : .fb_read = __prefix ## _defio_read, \
699 : .fb_write = __prefix ## _defio_write
700 :
701 : #define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \
702 : .fb_fillrect = __prefix ## _defio_fillrect, \
703 : .fb_copyarea = __prefix ## _defio_copyarea, \
704 : .fb_imageblit = __prefix ## _defio_imageblit
705 :
706 : #define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \
707 : .fb_mmap = fb_deferred_io_mmap
708 :
709 : #define FB_DEFAULT_DEFERRED_OPS(__prefix) \
710 : __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \
711 : __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \
712 : __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix)
713 :
714 : static inline bool fb_be_math(struct fb_info *info)
715 : {
716 : #ifdef CONFIG_FB_FOREIGN_ENDIAN
717 : #if defined(CONFIG_FB_BOTH_ENDIAN)
718 : return info->flags & FBINFO_BE_MATH;
719 : #elif defined(CONFIG_FB_BIG_ENDIAN)
720 : return true;
721 : #elif defined(CONFIG_FB_LITTLE_ENDIAN)
722 : return false;
723 : #endif /* CONFIG_FB_BOTH_ENDIAN */
724 : #else
725 : #ifdef __BIG_ENDIAN
726 : return true;
727 : #else
728 : return false;
729 : #endif /* __BIG_ENDIAN */
730 : #endif /* CONFIG_FB_FOREIGN_ENDIAN */
731 : }
732 :
733 : extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
734 : extern void framebuffer_release(struct fb_info *info);
735 : extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
736 :
737 : /* drivers/video/fbmon.c */
738 : #define FB_MAXTIMINGS 0
739 : #define FB_VSYNCTIMINGS 1
740 : #define FB_HSYNCTIMINGS 2
741 : #define FB_DCLKTIMINGS 3
742 : #define FB_IGNOREMON 0x100
743 :
744 : #define FB_MODE_IS_UNKNOWN 0
745 : #define FB_MODE_IS_DETAILED 1
746 : #define FB_MODE_IS_STANDARD 2
747 : #define FB_MODE_IS_VESA 4
748 : #define FB_MODE_IS_CALCULATED 8
749 : #define FB_MODE_IS_FIRST 16
750 : #define FB_MODE_IS_FROM_VAR 32
751 :
752 : extern int fbmon_dpms(const struct fb_info *fb_info);
753 : extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
754 : struct fb_info *info);
755 : extern int fb_validate_mode(const struct fb_var_screeninfo *var,
756 : struct fb_info *info);
757 : extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
758 : extern const unsigned char *fb_firmware_edid(struct device *device);
759 : extern void fb_edid_to_monspecs(unsigned char *edid,
760 : struct fb_monspecs *specs);
761 : extern void fb_destroy_modedb(struct fb_videomode *modedb);
762 : extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
763 : extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
764 :
765 : extern int of_get_fb_videomode(struct device_node *np,
766 : struct fb_videomode *fb,
767 : int index);
768 : extern int fb_videomode_from_videomode(const struct videomode *vm,
769 : struct fb_videomode *fbmode);
770 :
771 : /* drivers/video/modedb.c */
772 : #define VESA_MODEDB_SIZE 43
773 : #define DMT_SIZE 0x50
774 :
775 : extern void fb_var_to_videomode(struct fb_videomode *mode,
776 : const struct fb_var_screeninfo *var);
777 : extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
778 : const struct fb_videomode *mode);
779 : extern int fb_mode_is_equal(const struct fb_videomode *mode1,
780 : const struct fb_videomode *mode2);
781 : extern int fb_add_videomode(const struct fb_videomode *mode,
782 : struct list_head *head);
783 : extern void fb_delete_videomode(const struct fb_videomode *mode,
784 : struct list_head *head);
785 : extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
786 : struct list_head *head);
787 : extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
788 : struct list_head *head);
789 : extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
790 : struct list_head *head);
791 : extern void fb_destroy_modelist(struct list_head *head);
792 : extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
793 : struct list_head *head);
794 : extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
795 : struct list_head *head);
796 :
797 : /* drivers/video/fbcmap.c */
798 : extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
799 : extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
800 : extern void fb_dealloc_cmap(struct fb_cmap *cmap);
801 : extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
802 : extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
803 : extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
804 : extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
805 : extern const struct fb_cmap *fb_default_cmap(int len);
806 : extern void fb_invert_cmaps(void);
807 :
808 : struct fb_videomode {
809 : const char *name; /* optional */
810 : u32 refresh; /* optional */
811 : u32 xres;
812 : u32 yres;
813 : u32 pixclock;
814 : u32 left_margin;
815 : u32 right_margin;
816 : u32 upper_margin;
817 : u32 lower_margin;
818 : u32 hsync_len;
819 : u32 vsync_len;
820 : u32 sync;
821 : u32 vmode;
822 : u32 flag;
823 : };
824 :
825 : struct dmt_videomode {
826 : u32 dmt_id;
827 : u32 std_2byte_code;
828 : u32 cvt_3byte_code;
829 : const struct fb_videomode *mode;
830 : };
831 :
832 : extern const struct fb_videomode vesa_modes[];
833 : extern const struct dmt_videomode dmt_modes[];
834 :
835 : struct fb_modelist {
836 : struct list_head list;
837 : struct fb_videomode mode;
838 : };
839 :
840 : extern int fb_find_mode(struct fb_var_screeninfo *var,
841 : struct fb_info *info, const char *mode_option,
842 : const struct fb_videomode *db,
843 : unsigned int dbsize,
844 : const struct fb_videomode *default_mode,
845 : unsigned int default_bpp);
846 :
847 : #if defined(CONFIG_VIDEO_NOMODESET)
848 : bool fb_modesetting_disabled(const char *drvname);
849 : #else
850 : static inline bool fb_modesetting_disabled(const char *drvname)
851 : {
852 : return false;
853 : }
854 : #endif
855 :
856 : /* Convenience logging macros */
857 : #define fb_err(fb_info, fmt, ...) \
858 : pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
859 : #define fb_notice(info, fmt, ...) \
860 : pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
861 : #define fb_warn(fb_info, fmt, ...) \
862 : pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
863 : #define fb_info(fb_info, fmt, ...) \
864 : pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
865 : #define fb_dbg(fb_info, fmt, ...) \
866 : pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
867 :
868 : #endif /* _LINUX_FB_H */
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