1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_FB_H
3 #define _LINUX_FB_H
4
5 #include <linux/refcount.h>
6 #include <linux/kgdb.h>
7 #include <uapi/linux/fb.h>
8
9 #define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
10
11 #include <linux/fs.h>
12 #include <linux/init.h>
13 #include <linux/workqueue.h>
14 #include <linux/notifier.h>
15 #include <linux/list.h>
16 #include <linux/backlight.h>
17 #include <linux/slab.h>
18 #include <asm/io.h>
19
20 struct vm_area_struct;
21 struct fb_info;
22 struct device;
23 struct file;
24 struct videomode;
25 struct device_node;
26
27 /* Definitions below are used in the parsed monitor specs */
28 #define FB_DPMS_ACTIVE_OFF 1
29 #define FB_DPMS_SUSPEND 2
30 #define FB_DPMS_STANDBY 4
31
32 #define FB_DISP_DDI 1
33 #define FB_DISP_ANA_700_300 2
34 #define FB_DISP_ANA_714_286 4
35 #define FB_DISP_ANA_1000_400 8
36 #define FB_DISP_ANA_700_000 16
37
38 #define FB_DISP_MONO 32
39 #define FB_DISP_RGB 64
40 #define FB_DISP_MULTI 128
41 #define FB_DISP_UNKNOWN 256
42
43 #define FB_SIGNAL_NONE 0
44 #define FB_SIGNAL_BLANK_BLANK 1
45 #define FB_SIGNAL_SEPARATE 2
46 #define FB_SIGNAL_COMPOSITE 4
47 #define FB_SIGNAL_SYNC_ON_GREEN 8
48 #define FB_SIGNAL_SERRATION_ON 16
49
50 #define FB_MISC_PRIM_COLOR 1
51 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
52 #define FB_MISC_HDMI 4
53 struct fb_chroma {
54 __u32 redx; /* in fraction of 1024 */
55 __u32 greenx;
56 __u32 bluex;
57 __u32 whitex;
58 __u32 redy;
59 __u32 greeny;
60 __u32 bluey;
61 __u32 whitey;
62 };
63
64 struct fb_monspecs {
65 struct fb_chroma chroma;
66 struct fb_videomode *modedb; /* mode database */
67 __u8 manufacturer[4]; /* Manufacturer */
68 __u8 monitor[14]; /* Monitor String */
69 __u8 serial_no[14]; /* Serial Number */
70 __u8 ascii[14]; /* ? */
71 __u32 modedb_len; /* mode database length */
72 __u32 model; /* Monitor Model */
73 __u32 serial; /* Serial Number - Integer */
74 __u32 year; /* Year manufactured */
75 __u32 week; /* Week Manufactured */
76 __u32 hfmin; /* hfreq lower limit (Hz) */
77 __u32 hfmax; /* hfreq upper limit (Hz) */
78 __u32 dclkmin; /* pixelclock lower limit (Hz) */
79 __u32 dclkmax; /* pixelclock upper limit (Hz) */
80 __u16 input; /* display type - see FB_DISP_* */
81 __u16 dpms; /* DPMS support - see FB_DPMS_ */
82 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
83 __u16 vfmin; /* vfreq lower limit (Hz) */
84 __u16 vfmax; /* vfreq upper limit (Hz) */
85 __u16 gamma; /* Gamma - in fractions of 100 */
86 __u16 gtf : 1; /* supports GTF */
87 __u16 misc; /* Misc flags - see FB_MISC_* */
88 __u8 version; /* EDID version... */
89 __u8 revision; /* ...and revision */
90 __u8 max_x; /* Maximum horizontal size (cm) */
91 __u8 max_y; /* Maximum vertical size (cm) */
92 };
93
94 struct fb_cmap_user {
95 __u32 start; /* First entry */
96 __u32 len; /* Number of entries */
97 __u16 __user *red; /* Red values */
98 __u16 __user *green;
99 __u16 __user *blue;
100 __u16 __user *transp; /* transparency, can be NULL */
101 };
102
103 struct fb_image_user {
104 __u32 dx; /* Where to place image */
105 __u32 dy;
106 __u32 width; /* Size of image */
107 __u32 height;
108 __u32 fg_color; /* Only used when a mono bitmap */
109 __u32 bg_color;
110 __u8 depth; /* Depth of the image */
111 const char __user *data; /* Pointer to image data */
112 struct fb_cmap_user cmap; /* color map info */
113 };
114
115 struct fb_cursor_user {
116 __u16 set; /* what to set */
117 __u16 enable; /* cursor on/off */
118 __u16 rop; /* bitop operation */
119 const char __user *mask; /* cursor mask bits */
120 struct fbcurpos hot; /* cursor hot spot */
121 struct fb_image_user image; /* Cursor image */
122 };
123
124 /*
125 * Register/unregister for framebuffer events
126 */
127
128 /* The resolution of the passed in fb_info about to change */
129 #define FB_EVENT_MODE_CHANGE 0x01
130
131 #ifdef CONFIG_GUMSTIX_AM200EPD
132 /* only used by mach-pxa/am200epd.c */
133 #define FB_EVENT_FB_REGISTERED 0x05
134 #define FB_EVENT_FB_UNREGISTERED 0x06
135 #endif
136
137 /* A display blank is requested */
138 #define FB_EVENT_BLANK 0x09
139
140 struct fb_event {
141 struct fb_info *info;
142 void *data;
143 };
144
145 struct fb_blit_caps {
146 u32 x;
147 u32 y;
148 u32 len;
149 u32 flags;
150 };
151
152 #ifdef CONFIG_FB_NOTIFY
153 extern int fb_register_client(struct notifier_block *nb);
154 extern int fb_unregister_client(struct notifier_block *nb);
155 extern int fb_notifier_call_chain(unsigned long val, void *v);
156 #else
fb_register_client(struct notifier_block * nb)157 static inline int fb_register_client(struct notifier_block *nb)
158 {
159 return 0;
160 };
161
fb_unregister_client(struct notifier_block * nb)162 static inline int fb_unregister_client(struct notifier_block *nb)
163 {
164 return 0;
165 };
166
fb_notifier_call_chain(unsigned long val,void * v)167 static inline int fb_notifier_call_chain(unsigned long val, void *v)
168 {
169 return 0;
170 };
171 #endif
172
173 /*
174 * Pixmap structure definition
175 *
176 * The purpose of this structure is to translate data
177 * from the hardware independent format of fbdev to what
178 * format the hardware needs.
179 */
180
181 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
182 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
183 #define FB_PIXMAP_IO 4 /* memory is iomapped */
184 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
185
186 struct fb_pixmap {
187 u8 *addr; /* pointer to memory */
188 u32 size; /* size of buffer in bytes */
189 u32 offset; /* current offset to buffer */
190 u32 buf_align; /* byte alignment of each bitmap */
191 u32 scan_align; /* alignment per scanline */
192 u32 access_align; /* alignment per read/write (bits) */
193 u32 flags; /* see FB_PIXMAP_* */
194 u32 blit_x; /* supported bit block dimensions (1-32)*/
195 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
196 /* blit_y = 1 << (height - 1) */
197 /* if 0, will be set to 0xffffffff (all)*/
198 /* access methods */
199 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
200 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
201 };
202
203 #ifdef CONFIG_FB_DEFERRED_IO
204 struct fb_deferred_io_pageref {
205 struct page *page;
206 unsigned long offset;
207 /* private */
208 struct list_head list;
209 };
210
211 struct fb_deferred_io {
212 /* delay between mkwrite and deferred handler */
213 unsigned long delay;
214 bool sort_pagereflist; /* sort pagelist by offset */
215 int open_count; /* number of opened files; protected by fb_info lock */
216 struct mutex lock; /* mutex that protects the pageref list */
217 struct list_head pagereflist; /* list of pagerefs for touched pages */
218 /* callback */
219 void (*first_io)(struct fb_info *info);
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_DEFAULT 0
387 #define FBINFO_HWACCEL_DISABLED 0x0002
388 /* When FBINFO_HWACCEL_DISABLED is set:
389 * Hardware acceleration is turned off. Software implementations
390 * of required functions (copyarea(), fillrect(), and imageblit())
391 * takes over; acceleration engine should be in a quiescent state */
392
393 /* hints */
394 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
395 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
396 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
397
398 /* hardware supported ops */
399 /* semantics: when a bit is set, it indicates that the operation is
400 * accelerated by hardware.
401 * required functions will still work even if the bit is not set.
402 * optional functions may not even exist if the flag bit is not set.
403 */
404 #define FBINFO_HWACCEL_NONE 0x0000
405 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
406 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
407 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
408 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
409 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
410 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
411 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
412
413 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
414
415 /* A driver may set this flag to indicate that it does want a set_par to be
416 * called every time when fbcon_switch is executed. The advantage is that with
417 * this flag set you can really be sure that set_par is always called before
418 * any of the functions dependent on the correct hardware state or altering
419 * that state, even if you are using some broken X releases. The disadvantage
420 * is that it introduces unwanted delays to every console switch if set_par
421 * is slow. It is a good idea to try this flag in the drivers initialization
422 * code whenever there is a bug report related to switching between X and the
423 * framebuffer console.
424 */
425 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000
426
427 /* where the fb is a firmware driver, and can be replaced with a proper one */
428 #define FBINFO_MISC_FIRMWARE 0x80000
429 /*
430 * Host and GPU endianness differ.
431 */
432 #define FBINFO_FOREIGN_ENDIAN 0x100000
433 /*
434 * Big endian math. This is the same flags as above, but with different
435 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
436 * and host endianness. Drivers should not use this flag.
437 */
438 #define FBINFO_BE_MATH 0x100000
439 /*
440 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
441 * drivers to stop userspace from trying to share buffers behind the kernel's
442 * back. Instead dma-buf based buffer sharing should be used.
443 */
444 #define FBINFO_HIDE_SMEM_START 0x200000
445
446
447 struct fb_info {
448 refcount_t count;
449 int node;
450 int flags;
451 /*
452 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
453 * a lcd is not mounted upright and fbcon should rotate to compensate.
454 */
455 int fbcon_rotate_hint;
456 struct mutex lock; /* Lock for open/release/ioctl funcs */
457 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
458 struct fb_var_screeninfo var; /* Current var */
459 struct fb_fix_screeninfo fix; /* Current fix */
460 struct fb_monspecs monspecs; /* Current Monitor specs */
461 struct fb_pixmap pixmap; /* Image hardware mapper */
462 struct fb_pixmap sprite; /* Cursor hardware mapper */
463 struct fb_cmap cmap; /* Current cmap */
464 struct list_head modelist; /* mode list */
465 struct fb_videomode *mode; /* current mode */
466
467 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
468 /* assigned backlight device */
469 /* set before framebuffer registration,
470 remove after unregister */
471 struct backlight_device *bl_dev;
472
473 /* Backlight level curve */
474 struct mutex bl_curve_mutex;
475 u8 bl_curve[FB_BACKLIGHT_LEVELS];
476 #endif
477 #ifdef CONFIG_FB_DEFERRED_IO
478 struct delayed_work deferred_work;
479 unsigned long npagerefs;
480 struct fb_deferred_io_pageref *pagerefs;
481 struct fb_deferred_io *fbdefio;
482 #endif
483
484 const struct fb_ops *fbops;
485 struct device *device; /* This is the parent */
486 struct device *dev; /* This is this fb device */
487 int class_flag; /* private sysfs flags */
488 #ifdef CONFIG_FB_TILEBLITTING
489 struct fb_tile_ops *tileops; /* Tile Blitting */
490 #endif
491 union {
492 char __iomem *screen_base; /* Virtual address */
493 char *screen_buffer;
494 };
495 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
496 void *pseudo_palette; /* Fake palette of 16 colors */
497 #define FBINFO_STATE_RUNNING 0
498 #define FBINFO_STATE_SUSPENDED 1
499 u32 state; /* Hardware state i.e suspend */
500 void *fbcon_par; /* fbcon use-only private area */
501 /* From here on everything is device dependent */
502 void *par;
503 /* we need the PCI or similar aperture base/size not
504 smem_start/size as smem_start may just be an object
505 allocated inside the aperture so may not actually overlap */
506 struct apertures_struct {
507 unsigned int count;
508 struct aperture {
509 resource_size_t base;
510 resource_size_t size;
511 } ranges[0];
512 } *apertures;
513
514 bool skip_vt_switch; /* no VT switch on suspend/resume required */
515 };
516
alloc_apertures(unsigned int max_num)517 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
518 struct apertures_struct *a;
519
520 a = kzalloc(struct_size(a, ranges, max_num), GFP_KERNEL);
521 if (!a)
522 return NULL;
523 a->count = max_num;
524 return a;
525 }
526
527 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
528
529 /* This will go away
530 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
531 * when it wants to turn the acceleration engine on. This is
532 * really a separate operation, and should be modified via sysfs.
533 * But for now, we leave it broken with the following define
534 */
535 #define STUPID_ACCELF_TEXT_SHIT
536
537 // This will go away
538 #if defined(__sparc__)
539
540 /* We map all of our framebuffers such that big-endian accesses
541 * are what we want, so the following is sufficient.
542 */
543
544 // This will go away
545 #define fb_readb sbus_readb
546 #define fb_readw sbus_readw
547 #define fb_readl sbus_readl
548 #define fb_readq sbus_readq
549 #define fb_writeb sbus_writeb
550 #define fb_writew sbus_writew
551 #define fb_writel sbus_writel
552 #define fb_writeq sbus_writeq
553 #define fb_memset sbus_memset_io
554 #define fb_memcpy_fromfb sbus_memcpy_fromio
555 #define fb_memcpy_tofb sbus_memcpy_toio
556
557 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
558 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
559 defined(__arm__) || defined(__aarch64__) || defined(__mips__)
560
561 #define fb_readb __raw_readb
562 #define fb_readw __raw_readw
563 #define fb_readl __raw_readl
564 #define fb_readq __raw_readq
565 #define fb_writeb __raw_writeb
566 #define fb_writew __raw_writew
567 #define fb_writel __raw_writel
568 #define fb_writeq __raw_writeq
569 #define fb_memset memset_io
570 #define fb_memcpy_fromfb memcpy_fromio
571 #define fb_memcpy_tofb memcpy_toio
572
573 #else
574
575 #define fb_readb(addr) (*(volatile u8 *) (addr))
576 #define fb_readw(addr) (*(volatile u16 *) (addr))
577 #define fb_readl(addr) (*(volatile u32 *) (addr))
578 #define fb_readq(addr) (*(volatile u64 *) (addr))
579 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
580 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
581 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
582 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
583 #define fb_memset memset
584 #define fb_memcpy_fromfb memcpy
585 #define fb_memcpy_tofb memcpy
586
587 #endif
588
589 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
590 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
591 (val) << (bits))
592 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
593 (val) >> (bits))
594
595 /*
596 * `Generic' versions of the frame buffer device operations
597 */
598
599 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
600 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
601 extern int fb_blank(struct fb_info *info, int blank);
602 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
603 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
604 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
605 /*
606 * Drawing operations where framebuffer is in system RAM
607 */
608 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
609 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
610 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
611 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
612 size_t count, loff_t *ppos);
613 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
614 size_t count, loff_t *ppos);
615
616 /* drivers/video/fbmem.c */
617 extern int register_framebuffer(struct fb_info *fb_info);
618 extern void unregister_framebuffer(struct fb_info *fb_info);
619 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
620 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
621 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
622 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
623 u32 height, u32 shift_high, u32 shift_low, u32 mod);
624 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
625 extern void fb_set_suspend(struct fb_info *info, int state);
626 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
627 struct fb_fix_screeninfo *fix);
628 extern int fb_get_options(const char *name, char **option);
629 extern int fb_new_modelist(struct fb_info *info);
630
631 extern bool fb_center_logo;
632 extern int fb_logo_count;
633 extern struct class *fb_class;
634
lock_fb_info(struct fb_info * info)635 static inline void lock_fb_info(struct fb_info *info)
636 {
637 mutex_lock(&info->lock);
638 }
639
unlock_fb_info(struct fb_info * info)640 static inline void unlock_fb_info(struct fb_info *info)
641 {
642 mutex_unlock(&info->lock);
643 }
644
__fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)645 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
646 u8 *src, u32 s_pitch, u32 height)
647 {
648 u32 i, j;
649
650 d_pitch -= s_pitch;
651
652 for (i = height; i--; ) {
653 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
654 for (j = 0; j < s_pitch; j++)
655 *dst++ = *src++;
656 dst += d_pitch;
657 }
658 }
659
660 /* drivers/video/fb_defio.c */
661 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
662 extern int fb_deferred_io_init(struct fb_info *info);
663 extern void fb_deferred_io_open(struct fb_info *info,
664 struct inode *inode,
665 struct file *file);
666 extern void fb_deferred_io_release(struct fb_info *info);
667 extern void fb_deferred_io_cleanup(struct fb_info *info);
668 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
669 loff_t end, int datasync);
670
fb_be_math(struct fb_info * info)671 static inline bool fb_be_math(struct fb_info *info)
672 {
673 #ifdef CONFIG_FB_FOREIGN_ENDIAN
674 #if defined(CONFIG_FB_BOTH_ENDIAN)
675 return info->flags & FBINFO_BE_MATH;
676 #elif defined(CONFIG_FB_BIG_ENDIAN)
677 return true;
678 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
679 return false;
680 #endif /* CONFIG_FB_BOTH_ENDIAN */
681 #else
682 #ifdef __BIG_ENDIAN
683 return true;
684 #else
685 return false;
686 #endif /* __BIG_ENDIAN */
687 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
688 }
689
690 /* drivers/video/fbsysfs.c */
691 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
692 extern void framebuffer_release(struct fb_info *info);
693 extern int fb_init_device(struct fb_info *fb_info);
694 extern void fb_cleanup_device(struct fb_info *head);
695 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
696
697 /* drivers/video/fbmon.c */
698 #define FB_MAXTIMINGS 0
699 #define FB_VSYNCTIMINGS 1
700 #define FB_HSYNCTIMINGS 2
701 #define FB_DCLKTIMINGS 3
702 #define FB_IGNOREMON 0x100
703
704 #define FB_MODE_IS_UNKNOWN 0
705 #define FB_MODE_IS_DETAILED 1
706 #define FB_MODE_IS_STANDARD 2
707 #define FB_MODE_IS_VESA 4
708 #define FB_MODE_IS_CALCULATED 8
709 #define FB_MODE_IS_FIRST 16
710 #define FB_MODE_IS_FROM_VAR 32
711
712 extern int fbmon_dpms(const struct fb_info *fb_info);
713 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
714 struct fb_info *info);
715 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
716 struct fb_info *info);
717 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
718 extern const unsigned char *fb_firmware_edid(struct device *device);
719 extern void fb_edid_to_monspecs(unsigned char *edid,
720 struct fb_monspecs *specs);
721 extern void fb_destroy_modedb(struct fb_videomode *modedb);
722 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
723 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
724
725 extern int of_get_fb_videomode(struct device_node *np,
726 struct fb_videomode *fb,
727 int index);
728 extern int fb_videomode_from_videomode(const struct videomode *vm,
729 struct fb_videomode *fbmode);
730
731 /* drivers/video/modedb.c */
732 #define VESA_MODEDB_SIZE 43
733 #define DMT_SIZE 0x50
734
735 extern void fb_var_to_videomode(struct fb_videomode *mode,
736 const struct fb_var_screeninfo *var);
737 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
738 const struct fb_videomode *mode);
739 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
740 const struct fb_videomode *mode2);
741 extern int fb_add_videomode(const struct fb_videomode *mode,
742 struct list_head *head);
743 extern void fb_delete_videomode(const struct fb_videomode *mode,
744 struct list_head *head);
745 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
746 struct list_head *head);
747 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
748 struct list_head *head);
749 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
750 struct list_head *head);
751 extern void fb_destroy_modelist(struct list_head *head);
752 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
753 struct list_head *head);
754 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
755 struct list_head *head);
756
757 /* drivers/video/fbcmap.c */
758 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
759 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
760 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
761 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
762 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
763 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
764 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
765 extern const struct fb_cmap *fb_default_cmap(int len);
766 extern void fb_invert_cmaps(void);
767
768 struct fb_videomode {
769 const char *name; /* optional */
770 u32 refresh; /* optional */
771 u32 xres;
772 u32 yres;
773 u32 pixclock;
774 u32 left_margin;
775 u32 right_margin;
776 u32 upper_margin;
777 u32 lower_margin;
778 u32 hsync_len;
779 u32 vsync_len;
780 u32 sync;
781 u32 vmode;
782 u32 flag;
783 };
784
785 struct dmt_videomode {
786 u32 dmt_id;
787 u32 std_2byte_code;
788 u32 cvt_3byte_code;
789 const struct fb_videomode *mode;
790 };
791
792 extern const char *fb_mode_option;
793 extern const struct fb_videomode vesa_modes[];
794 extern const struct dmt_videomode dmt_modes[];
795
796 struct fb_modelist {
797 struct list_head list;
798 struct fb_videomode mode;
799 };
800
801 extern int fb_find_mode(struct fb_var_screeninfo *var,
802 struct fb_info *info, const char *mode_option,
803 const struct fb_videomode *db,
804 unsigned int dbsize,
805 const struct fb_videomode *default_mode,
806 unsigned int default_bpp);
807
808 /* Convenience logging macros */
809 #define fb_err(fb_info, fmt, ...) \
810 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
811 #define fb_notice(info, fmt, ...) \
812 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
813 #define fb_warn(fb_info, fmt, ...) \
814 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
815 #define fb_info(fb_info, fmt, ...) \
816 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
817 #define fb_dbg(fb_info, fmt, ...) \
818 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
819
820 #endif /* _LINUX_FB_H */
821