1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_FB_H
3 #define _LINUX_FB_H
4
5 #include <linux/kgdb.h>
6 #include <uapi/linux/fb.h>
7
8 #define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
9
10 #include <linux/fs.h>
11 #include <linux/init.h>
12 #include <linux/workqueue.h>
13 #include <linux/notifier.h>
14 #include <linux/list.h>
15 #include <linux/backlight.h>
16 #include <linux/slab.h>
17 #include <asm/io.h>
18
19 struct vm_area_struct;
20 struct fb_info;
21 struct device;
22 struct file;
23 struct videomode;
24 struct device_node;
25
26 /* Definitions below are used in the parsed monitor specs */
27 #define FB_DPMS_ACTIVE_OFF 1
28 #define FB_DPMS_SUSPEND 2
29 #define FB_DPMS_STANDBY 4
30
31 #define FB_DISP_DDI 1
32 #define FB_DISP_ANA_700_300 2
33 #define FB_DISP_ANA_714_286 4
34 #define FB_DISP_ANA_1000_400 8
35 #define FB_DISP_ANA_700_000 16
36
37 #define FB_DISP_MONO 32
38 #define FB_DISP_RGB 64
39 #define FB_DISP_MULTI 128
40 #define FB_DISP_UNKNOWN 256
41
42 #define FB_SIGNAL_NONE 0
43 #define FB_SIGNAL_BLANK_BLANK 1
44 #define FB_SIGNAL_SEPARATE 2
45 #define FB_SIGNAL_COMPOSITE 4
46 #define FB_SIGNAL_SYNC_ON_GREEN 8
47 #define FB_SIGNAL_SERRATION_ON 16
48
49 #define FB_MISC_PRIM_COLOR 1
50 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
51 #define FB_MISC_HDMI 4
52 struct fb_chroma {
53 __u32 redx; /* in fraction of 1024 */
54 __u32 greenx;
55 __u32 bluex;
56 __u32 whitex;
57 __u32 redy;
58 __u32 greeny;
59 __u32 bluey;
60 __u32 whitey;
61 };
62
63 struct fb_monspecs {
64 struct fb_chroma chroma;
65 struct fb_videomode *modedb; /* mode database */
66 __u8 manufacturer[4]; /* Manufacturer */
67 __u8 monitor[14]; /* Monitor String */
68 __u8 serial_no[14]; /* Serial Number */
69 __u8 ascii[14]; /* ? */
70 __u32 modedb_len; /* mode database length */
71 __u32 model; /* Monitor Model */
72 __u32 serial; /* Serial Number - Integer */
73 __u32 year; /* Year manufactured */
74 __u32 week; /* Week Manufactured */
75 __u32 hfmin; /* hfreq lower limit (Hz) */
76 __u32 hfmax; /* hfreq upper limit (Hz) */
77 __u32 dclkmin; /* pixelclock lower limit (Hz) */
78 __u32 dclkmax; /* pixelclock upper limit (Hz) */
79 __u16 input; /* display type - see FB_DISP_* */
80 __u16 dpms; /* DPMS support - see FB_DPMS_ */
81 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
82 __u16 vfmin; /* vfreq lower limit (Hz) */
83 __u16 vfmax; /* vfreq upper limit (Hz) */
84 __u16 gamma; /* Gamma - in fractions of 100 */
85 __u16 gtf : 1; /* supports GTF */
86 __u16 misc; /* Misc flags - see FB_MISC_* */
87 __u8 version; /* EDID version... */
88 __u8 revision; /* ...and revision */
89 __u8 max_x; /* Maximum horizontal size (cm) */
90 __u8 max_y; /* Maximum vertical size (cm) */
91 };
92
93 struct fb_cmap_user {
94 __u32 start; /* First entry */
95 __u32 len; /* Number of entries */
96 __u16 __user *red; /* Red values */
97 __u16 __user *green;
98 __u16 __user *blue;
99 __u16 __user *transp; /* transparency, can be NULL */
100 };
101
102 struct fb_image_user {
103 __u32 dx; /* Where to place image */
104 __u32 dy;
105 __u32 width; /* Size of image */
106 __u32 height;
107 __u32 fg_color; /* Only used when a mono bitmap */
108 __u32 bg_color;
109 __u8 depth; /* Depth of the image */
110 const char __user *data; /* Pointer to image data */
111 struct fb_cmap_user cmap; /* color map info */
112 };
113
114 struct fb_cursor_user {
115 __u16 set; /* what to set */
116 __u16 enable; /* cursor on/off */
117 __u16 rop; /* bitop operation */
118 const char __user *mask; /* cursor mask bits */
119 struct fbcurpos hot; /* cursor hot spot */
120 struct fb_image_user image; /* Cursor image */
121 };
122
123 /*
124 * Register/unregister for framebuffer events
125 */
126
127 /* The resolution of the passed in fb_info about to change */
128 #define FB_EVENT_MODE_CHANGE 0x01
129
130 #ifdef CONFIG_GUMSTIX_AM200EPD
131 /* only used by mach-pxa/am200epd.c */
132 #define FB_EVENT_FB_REGISTERED 0x05
133 #define FB_EVENT_FB_UNREGISTERED 0x06
134 #endif
135
136 /* A display blank is requested */
137 #define FB_EVENT_BLANK 0x09
138 /* A hardware display blank early change occurred */
139 #define FB_EARLY_EVENT_BLANK 0x10
140 /* A hardware display blank revert early change occurred */
141 #define FB_R_EARLY_EVENT_BLANK 0x11
142
143 struct fb_event {
144 struct fb_info *info;
145 void *data;
146 };
147
148 struct fb_blit_caps {
149 u32 x;
150 u32 y;
151 u32 len;
152 u32 flags;
153 };
154
155 #ifdef CONFIG_FB_NOTIFY
156 extern int fb_register_client(struct notifier_block *nb);
157 extern int fb_unregister_client(struct notifier_block *nb);
158 extern int fb_notifier_call_chain(unsigned long val, void *v);
159 #else
160 static inline int fb_register_client(struct notifier_block *nb)
161 {
162 return 0;
163 };
164
165 static inline int fb_unregister_client(struct notifier_block *nb)
166 {
167 return 0;
168 };
169
170 static inline int fb_notifier_call_chain(unsigned long val, void *v)
171 {
172 return 0;
173 };
174 #endif
175
176 /*
177 * Pixmap structure definition
178 *
179 * The purpose of this structure is to translate data
180 * from the hardware independent format of fbdev to what
181 * format the hardware needs.
182 */
183
184 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
185 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
186 #define FB_PIXMAP_IO 4 /* memory is iomapped */
187 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
188
189 struct fb_pixmap {
190 u8 *addr; /* pointer to memory */
191 u32 size; /* size of buffer in bytes */
192 u32 offset; /* current offset to buffer */
193 u32 buf_align; /* byte alignment of each bitmap */
194 u32 scan_align; /* alignment per scanline */
195 u32 access_align; /* alignment per read/write (bits) */
196 u32 flags; /* see FB_PIXMAP_* */
197 u32 blit_x; /* supported bit block dimensions (1-32)*/
198 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
199 /* blit_y = 1 << (height - 1) */
200 /* if 0, will be set to 0xffffffff (all)*/
201 /* access methods */
202 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
203 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
204 };
205
206 #ifdef CONFIG_FB_DEFERRED_IO
207 struct fb_deferred_io {
208 /* delay between mkwrite and deferred handler */
209 unsigned long delay;
210 struct mutex lock; /* mutex that protects the page list */
211 struct list_head pagelist; /* list of touched pages */
212 /* callback */
213 void (*first_io)(struct fb_info *info);
214 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
215 };
216 #endif
217
218 /*
219 * Frame buffer operations
220 *
221 * LOCKING NOTE: those functions must _ALL_ be called with the console
222 * semaphore held, this is the only suitable locking mechanism we have
223 * in 2.6. Some may be called at interrupt time at this point though.
224 *
225 * The exception to this is the debug related hooks. Putting the fb
226 * into a debug state (e.g. flipping to the kernel console) and restoring
227 * it must be done in a lock-free manner, so low level drivers should
228 * keep track of the initial console (if applicable) and may need to
229 * perform direct, unlocked hardware writes in these hooks.
230 */
231
232 struct fb_ops {
233 /* open/release and usage marking */
234 struct module *owner;
235 int (*fb_open)(struct fb_info *info, int user);
236 int (*fb_release)(struct fb_info *info, int user);
237
238 /* For framebuffers with strange non linear layouts or that do not
239 * work with normal memory mapped access
240 */
241 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
242 size_t count, loff_t *ppos);
243 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
244 size_t count, loff_t *ppos);
245
246 /* checks var and eventually tweaks it to something supported,
247 * DO NOT MODIFY PAR */
248 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
249
250 /* set the video mode according to info->var */
251 int (*fb_set_par)(struct fb_info *info);
252
253 /* set color register */
254 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
255 unsigned blue, unsigned transp, struct fb_info *info);
256
257 /* set color registers in batch */
258 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
259
260 /* blank display */
261 int (*fb_blank)(int blank, struct fb_info *info);
262
263 /* pan display */
264 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
265
266 /* Draws a rectangle */
267 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
268 /* Copy data from area to another */
269 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
270 /* Draws a image to the display */
271 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
272
273 /* Draws cursor */
274 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
275
276 /* wait for blit idle, optional */
277 int (*fb_sync)(struct fb_info *info);
278
279 /* perform fb specific ioctl (optional) */
280 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
281 unsigned long arg);
282
283 /* Handle 32bit compat ioctl (optional) */
284 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
285 unsigned long arg);
286
287 /* perform fb specific mmap */
288 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
289
290 /* get capability given var */
291 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
292 struct fb_var_screeninfo *var);
293
294 /* teardown any resources to do with this framebuffer */
295 void (*fb_destroy)(struct fb_info *info);
296
297 /* called at KDB enter and leave time to prepare the console */
298 int (*fb_debug_enter)(struct fb_info *info);
299 int (*fb_debug_leave)(struct fb_info *info);
300 };
301
302 #ifdef CONFIG_FB_TILEBLITTING
303 #define FB_TILE_CURSOR_NONE 0
304 #define FB_TILE_CURSOR_UNDERLINE 1
305 #define FB_TILE_CURSOR_LOWER_THIRD 2
306 #define FB_TILE_CURSOR_LOWER_HALF 3
307 #define FB_TILE_CURSOR_TWO_THIRDS 4
308 #define FB_TILE_CURSOR_BLOCK 5
309
310 struct fb_tilemap {
311 __u32 width; /* width of each tile in pixels */
312 __u32 height; /* height of each tile in scanlines */
313 __u32 depth; /* color depth of each tile */
314 __u32 length; /* number of tiles in the map */
315 const __u8 *data; /* actual tile map: a bitmap array, packed
316 to the nearest byte */
317 };
318
319 struct fb_tilerect {
320 __u32 sx; /* origin in the x-axis */
321 __u32 sy; /* origin in the y-axis */
322 __u32 width; /* number of tiles in the x-axis */
323 __u32 height; /* number of tiles in the y-axis */
324 __u32 index; /* what tile to use: index to tile map */
325 __u32 fg; /* foreground color */
326 __u32 bg; /* background color */
327 __u32 rop; /* raster operation */
328 };
329
330 struct fb_tilearea {
331 __u32 sx; /* source origin in the x-axis */
332 __u32 sy; /* source origin in the y-axis */
333 __u32 dx; /* destination origin in the x-axis */
334 __u32 dy; /* destination origin in the y-axis */
335 __u32 width; /* number of tiles in the x-axis */
336 __u32 height; /* number of tiles in the y-axis */
337 };
338
339 struct fb_tileblit {
340 __u32 sx; /* origin in the x-axis */
341 __u32 sy; /* origin in the y-axis */
342 __u32 width; /* number of tiles in the x-axis */
343 __u32 height; /* number of tiles in the y-axis */
344 __u32 fg; /* foreground color */
345 __u32 bg; /* background color */
346 __u32 length; /* number of tiles to draw */
347 __u32 *indices; /* array of indices to tile map */
348 };
349
350 struct fb_tilecursor {
351 __u32 sx; /* cursor position in the x-axis */
352 __u32 sy; /* cursor position in the y-axis */
353 __u32 mode; /* 0 = erase, 1 = draw */
354 __u32 shape; /* see FB_TILE_CURSOR_* */
355 __u32 fg; /* foreground color */
356 __u32 bg; /* background color */
357 };
358
359 struct fb_tile_ops {
360 /* set tile characteristics */
361 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
362
363 /* all dimensions from hereon are in terms of tiles */
364
365 /* move a rectangular region of tiles from one area to another*/
366 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
367 /* fill a rectangular region with a tile */
368 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
369 /* copy an array of tiles */
370 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
371 /* cursor */
372 void (*fb_tilecursor)(struct fb_info *info,
373 struct fb_tilecursor *cursor);
374 /* get maximum length of the tile map */
375 int (*fb_get_tilemax)(struct fb_info *info);
376 };
377 #endif /* CONFIG_FB_TILEBLITTING */
378
379 /* FBINFO_* = fb_info.flags bit flags */
380 #define FBINFO_DEFAULT 0
381 #define FBINFO_HWACCEL_DISABLED 0x0002
382 /* When FBINFO_HWACCEL_DISABLED is set:
383 * Hardware acceleration is turned off. Software implementations
384 * of required functions (copyarea(), fillrect(), and imageblit())
385 * takes over; acceleration engine should be in a quiescent state */
386
387 /* hints */
388 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
389 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
390 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
391
392 /* hardware supported ops */
393 /* semantics: when a bit is set, it indicates that the operation is
394 * accelerated by hardware.
395 * required functions will still work even if the bit is not set.
396 * optional functions may not even exist if the flag bit is not set.
397 */
398 #define FBINFO_HWACCEL_NONE 0x0000
399 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
400 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
401 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
402 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
403 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
404 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
405 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
406
407 #define FBINFO_MISC_USEREVENT 0x10000 /* event request
408 from userspace */
409 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
410
411 /* A driver may set this flag to indicate that it does want a set_par to be
412 * called every time when fbcon_switch is executed. The advantage is that with
413 * this flag set you can really be sure that set_par is always called before
414 * any of the functions dependent on the correct hardware state or altering
415 * that state, even if you are using some broken X releases. The disadvantage
416 * is that it introduces unwanted delays to every console switch if set_par
417 * is slow. It is a good idea to try this flag in the drivers initialization
418 * code whenever there is a bug report related to switching between X and the
419 * framebuffer console.
420 */
421 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000
422
423 /* where the fb is a firmware driver, and can be replaced with a proper one */
424 #define FBINFO_MISC_FIRMWARE 0x80000
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 atomic_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 work_struct queue; /* Framebuffer event queue */
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 struct fb_deferred_io *fbdefio;
477 #endif
478
479 struct fb_ops *fbops;
480 struct device *device; /* This is the parent */
481 struct device *dev; /* This is this fb device */
482 int class_flag; /* private sysfs flags */
483 #ifdef CONFIG_FB_TILEBLITTING
484 struct fb_tile_ops *tileops; /* Tile Blitting */
485 #endif
486 union {
487 char __iomem *screen_base; /* Virtual address */
488 char *screen_buffer;
489 };
490 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
491 void *pseudo_palette; /* Fake palette of 16 colors */
492 #define FBINFO_STATE_RUNNING 0
493 #define FBINFO_STATE_SUSPENDED 1
494 u32 state; /* Hardware state i.e suspend */
495 void *fbcon_par; /* fbcon use-only private area */
496 /* From here on everything is device dependent */
497 void *par;
498 /* we need the PCI or similar aperture base/size not
499 smem_start/size as smem_start may just be an object
500 allocated inside the aperture so may not actually overlap */
501 struct apertures_struct {
502 unsigned int count;
503 struct aperture {
504 resource_size_t base;
505 resource_size_t size;
506 } ranges[0];
507 } *apertures;
508
509 bool skip_vt_switch; /* no VT switch on suspend/resume required */
510 };
511
512 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
513 struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
514 + max_num * sizeof(struct aperture), GFP_KERNEL);
515 if (!a)
516 return NULL;
517 a->count = max_num;
518 return a;
519 }
520
521 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
522
523 /* This will go away
524 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
525 * when it wants to turn the acceleration engine on. This is
526 * really a separate operation, and should be modified via sysfs.
527 * But for now, we leave it broken with the following define
528 */
529 #define STUPID_ACCELF_TEXT_SHIT
530
531 // This will go away
532 #if defined(__sparc__)
533
534 /* We map all of our framebuffers such that big-endian accesses
535 * are what we want, so the following is sufficient.
536 */
537
538 // This will go away
539 #define fb_readb sbus_readb
540 #define fb_readw sbus_readw
541 #define fb_readl sbus_readl
542 #define fb_readq sbus_readq
543 #define fb_writeb sbus_writeb
544 #define fb_writew sbus_writew
545 #define fb_writel sbus_writel
546 #define fb_writeq sbus_writeq
547 #define fb_memset sbus_memset_io
548 #define fb_memcpy_fromfb sbus_memcpy_fromio
549 #define fb_memcpy_tofb sbus_memcpy_toio
550
551 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
552 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
553 defined(__arm__) || defined(__aarch64__)
554
555 #define fb_readb __raw_readb
556 #define fb_readw __raw_readw
557 #define fb_readl __raw_readl
558 #define fb_readq __raw_readq
559 #define fb_writeb __raw_writeb
560 #define fb_writew __raw_writew
561 #define fb_writel __raw_writel
562 #define fb_writeq __raw_writeq
563 #define fb_memset memset_io
564 #define fb_memcpy_fromfb memcpy_fromio
565 #define fb_memcpy_tofb memcpy_toio
566
567 #else
568
569 #define fb_readb(addr) (*(volatile u8 *) (addr))
570 #define fb_readw(addr) (*(volatile u16 *) (addr))
571 #define fb_readl(addr) (*(volatile u32 *) (addr))
572 #define fb_readq(addr) (*(volatile u64 *) (addr))
573 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
574 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
575 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
576 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
577 #define fb_memset memset
578 #define fb_memcpy_fromfb memcpy
579 #define fb_memcpy_tofb memcpy
580
581 #endif
582
583 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
584 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
585 (val) << (bits))
586 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
587 (val) >> (bits))
588
589 /*
590 * `Generic' versions of the frame buffer device operations
591 */
592
593 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
594 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
595 extern int fb_blank(struct fb_info *info, int blank);
596 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
597 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
598 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
599 /*
600 * Drawing operations where framebuffer is in system RAM
601 */
602 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
603 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
604 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
605 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
606 size_t count, loff_t *ppos);
607 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
608 size_t count, loff_t *ppos);
609
610 /* drivers/video/fbmem.c */
611 extern int register_framebuffer(struct fb_info *fb_info);
612 extern void unregister_framebuffer(struct fb_info *fb_info);
613 extern void unlink_framebuffer(struct fb_info *fb_info);
614 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id,
615 const char *name);
616 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
617 const char *name, bool primary);
618 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
619 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
620 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
621 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
622 u32 height, u32 shift_high, u32 shift_low, u32 mod);
623 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
624 extern void fb_set_suspend(struct fb_info *info, int state);
625 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
626 struct fb_fix_screeninfo *fix);
627 extern int fb_get_options(const char *name, char **option);
628 extern int fb_new_modelist(struct fb_info *info);
629
630 extern struct fb_info *registered_fb[FB_MAX];
631 extern int num_registered_fb;
632 extern bool fb_center_logo;
633 extern struct class *fb_class;
634
635 #define for_each_registered_fb(i) \
636 for (i = 0; i < FB_MAX; i++) \
637 if (!registered_fb[i]) {} else
638
639 static inline void lock_fb_info(struct fb_info *info)
640 {
641 mutex_lock(&info->lock);
642 }
643
644 static inline void unlock_fb_info(struct fb_info *info)
645 {
646 mutex_unlock(&info->lock);
647 }
648
649 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
650 u8 *src, u32 s_pitch, u32 height)
651 {
652 u32 i, j;
653
654 d_pitch -= s_pitch;
655
656 for (i = height; i--; ) {
657 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
658 for (j = 0; j < s_pitch; j++)
659 *dst++ = *src++;
660 dst += d_pitch;
661 }
662 }
663
664 /* drivers/video/fb_defio.c */
665 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
666 extern void fb_deferred_io_init(struct fb_info *info);
667 extern void fb_deferred_io_open(struct fb_info *info,
668 struct inode *inode,
669 struct file *file);
670 extern void fb_deferred_io_cleanup(struct fb_info *info);
671 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
672 loff_t end, int datasync);
673
674 static inline bool fb_be_math(struct fb_info *info)
675 {
676 #ifdef CONFIG_FB_FOREIGN_ENDIAN
677 #if defined(CONFIG_FB_BOTH_ENDIAN)
678 return info->flags & FBINFO_BE_MATH;
679 #elif defined(CONFIG_FB_BIG_ENDIAN)
680 return true;
681 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
682 return false;
683 #endif /* CONFIG_FB_BOTH_ENDIAN */
684 #else
685 #ifdef __BIG_ENDIAN
686 return true;
687 #else
688 return false;
689 #endif /* __BIG_ENDIAN */
690 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
691 }
692
693 /* drivers/video/fbsysfs.c */
694 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
695 extern void framebuffer_release(struct fb_info *info);
696 extern int fb_init_device(struct fb_info *fb_info);
697 extern void fb_cleanup_device(struct fb_info *head);
698 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
699
700 /* drivers/video/fbmon.c */
701 #define FB_MAXTIMINGS 0
702 #define FB_VSYNCTIMINGS 1
703 #define FB_HSYNCTIMINGS 2
704 #define FB_DCLKTIMINGS 3
705 #define FB_IGNOREMON 0x100
706
707 #define FB_MODE_IS_UNKNOWN 0
708 #define FB_MODE_IS_DETAILED 1
709 #define FB_MODE_IS_STANDARD 2
710 #define FB_MODE_IS_VESA 4
711 #define FB_MODE_IS_CALCULATED 8
712 #define FB_MODE_IS_FIRST 16
713 #define FB_MODE_IS_FROM_VAR 32
714
715 extern int fbmon_dpms(const struct fb_info *fb_info);
716 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
717 struct fb_info *info);
718 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
719 struct fb_info *info);
720 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
721 extern const unsigned char *fb_firmware_edid(struct device *device);
722 extern void fb_edid_to_monspecs(unsigned char *edid,
723 struct fb_monspecs *specs);
724 extern void fb_destroy_modedb(struct fb_videomode *modedb);
725 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
726 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
727
728 extern int of_get_fb_videomode(struct device_node *np,
729 struct fb_videomode *fb,
730 int index);
731 extern int fb_videomode_from_videomode(const struct videomode *vm,
732 struct fb_videomode *fbmode);
733
734 /* drivers/video/modedb.c */
735 #define VESA_MODEDB_SIZE 43
736 #define DMT_SIZE 0x50
737
738 extern void fb_var_to_videomode(struct fb_videomode *mode,
739 const struct fb_var_screeninfo *var);
740 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
741 const struct fb_videomode *mode);
742 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
743 const struct fb_videomode *mode2);
744 extern int fb_add_videomode(const struct fb_videomode *mode,
745 struct list_head *head);
746 extern void fb_delete_videomode(const struct fb_videomode *mode,
747 struct list_head *head);
748 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
749 struct list_head *head);
750 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
751 struct list_head *head);
752 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
753 struct list_head *head);
754 extern void fb_destroy_modelist(struct list_head *head);
755 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
756 struct list_head *head);
757 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
758 struct list_head *head);
759
760 /* drivers/video/fbcmap.c */
761 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
762 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
763 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
764 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
765 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
766 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
767 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
768 extern const struct fb_cmap *fb_default_cmap(int len);
769 extern void fb_invert_cmaps(void);
770
771 struct fb_videomode {
772 const char *name; /* optional */
773 u32 refresh; /* optional */
774 u32 xres;
775 u32 yres;
776 u32 pixclock;
777 u32 left_margin;
778 u32 right_margin;
779 u32 upper_margin;
780 u32 lower_margin;
781 u32 hsync_len;
782 u32 vsync_len;
783 u32 sync;
784 u32 vmode;
785 u32 flag;
786 };
787
788 struct dmt_videomode {
789 u32 dmt_id;
790 u32 std_2byte_code;
791 u32 cvt_3byte_code;
792 const struct fb_videomode *mode;
793 };
794
795 extern const char *fb_mode_option;
796 extern const struct fb_videomode vesa_modes[];
797 extern const struct dmt_videomode dmt_modes[];
798
799 struct fb_modelist {
800 struct list_head list;
801 struct fb_videomode mode;
802 };
803
804 extern int fb_find_mode(struct fb_var_screeninfo *var,
805 struct fb_info *info, const char *mode_option,
806 const struct fb_videomode *db,
807 unsigned int dbsize,
808 const struct fb_videomode *default_mode,
809 unsigned int default_bpp);
810
811 /* Convenience logging macros */
812 #define fb_err(fb_info, fmt, ...) \
813 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
814 #define fb_notice(info, fmt, ...) \
815 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
816 #define fb_warn(fb_info, fmt, ...) \
817 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
818 #define fb_info(fb_info, fmt, ...) \
819 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
820 #define fb_dbg(fb_info, fmt, ...) \
821 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
822
823 #endif /* _LINUX_FB_H */
824
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