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
139 struct fb_event {
140 struct fb_info *info;
141 void *data;
142 };
143
144 struct fb_blit_caps {
145 u32 x;
146 u32 y;
147 u32 len;
148 u32 flags;
149 };
150
151 #ifdef CONFIG_FB_NOTIFY
152 extern int fb_register_client(struct notifier_block *nb);
153 extern int fb_unregister_client(struct notifier_block *nb);
154 extern int fb_notifier_call_chain(unsigned long val, void *v);
155 #else
fb_register_client(struct notifier_block * nb)156 static inline int fb_register_client(struct notifier_block *nb)
157 {
158 return 0;
159 };
160
fb_unregister_client(struct notifier_block * nb)161 static inline int fb_unregister_client(struct notifier_block *nb)
162 {
163 return 0;
164 };
165
fb_notifier_call_chain(unsigned long val,void * v)166 static inline int fb_notifier_call_chain(unsigned long val, void *v)
167 {
168 return 0;
169 };
170 #endif
171
172 /*
173 * Pixmap structure definition
174 *
175 * The purpose of this structure is to translate data
176 * from the hardware independent format of fbdev to what
177 * format the hardware needs.
178 */
179
180 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
181 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
182 #define FB_PIXMAP_IO 4 /* memory is iomapped */
183 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
184
185 struct fb_pixmap {
186 u8 *addr; /* pointer to memory */
187 u32 size; /* size of buffer in bytes */
188 u32 offset; /* current offset to buffer */
189 u32 buf_align; /* byte alignment of each bitmap */
190 u32 scan_align; /* alignment per scanline */
191 u32 access_align; /* alignment per read/write (bits) */
192 u32 flags; /* see FB_PIXMAP_* */
193 u32 blit_x; /* supported bit block dimensions (1-32)*/
194 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
195 /* blit_y = 1 << (height - 1) */
196 /* if 0, will be set to 0xffffffff (all)*/
197 /* access methods */
198 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
199 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
200 };
201
202 #ifdef CONFIG_FB_DEFERRED_IO
203 struct fb_deferred_io {
204 /* delay between mkwrite and deferred handler */
205 unsigned long delay;
206 struct mutex lock; /* mutex that protects the page list */
207 struct list_head pagelist; /* list of touched pages */
208 /* callback */
209 void (*first_io)(struct fb_info *info);
210 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
211 };
212 #endif
213
214 /*
215 * Frame buffer operations
216 *
217 * LOCKING NOTE: those functions must _ALL_ be called with the console
218 * semaphore held, this is the only suitable locking mechanism we have
219 * in 2.6. Some may be called at interrupt time at this point though.
220 *
221 * The exception to this is the debug related hooks. Putting the fb
222 * into a debug state (e.g. flipping to the kernel console) and restoring
223 * it must be done in a lock-free manner, so low level drivers should
224 * keep track of the initial console (if applicable) and may need to
225 * perform direct, unlocked hardware writes in these hooks.
226 */
227
228 struct fb_ops {
229 /* open/release and usage marking */
230 struct module *owner;
231 int (*fb_open)(struct fb_info *info, int user);
232 int (*fb_release)(struct fb_info *info, int user);
233
234 /* For framebuffers with strange non linear layouts or that do not
235 * work with normal memory mapped access
236 */
237 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
238 size_t count, loff_t *ppos);
239 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
240 size_t count, loff_t *ppos);
241
242 /* checks var and eventually tweaks it to something supported,
243 * DO NOT MODIFY PAR */
244 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
245
246 /* set the video mode according to info->var */
247 int (*fb_set_par)(struct fb_info *info);
248
249 /* set color register */
250 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
251 unsigned blue, unsigned transp, struct fb_info *info);
252
253 /* set color registers in batch */
254 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
255
256 /* blank display */
257 int (*fb_blank)(int blank, struct fb_info *info);
258
259 /* pan display */
260 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
261
262 /* Draws a rectangle */
263 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
264 /* Copy data from area to another */
265 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
266 /* Draws a image to the display */
267 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
268
269 /* Draws cursor */
270 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
271
272 /* wait for blit idle, optional */
273 int (*fb_sync)(struct fb_info *info);
274
275 /* perform fb specific ioctl (optional) */
276 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
277 unsigned long arg);
278
279 /* Handle 32bit compat ioctl (optional) */
280 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
281 unsigned long arg);
282
283 /* perform fb specific mmap */
284 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
285
286 /* get capability given var */
287 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
288 struct fb_var_screeninfo *var);
289
290 /* teardown any resources to do with this framebuffer */
291 void (*fb_destroy)(struct fb_info *info);
292
293 /* called at KDB enter and leave time to prepare the console */
294 int (*fb_debug_enter)(struct fb_info *info);
295 int (*fb_debug_leave)(struct fb_info *info);
296 };
297
298 #ifdef CONFIG_FB_TILEBLITTING
299 #define FB_TILE_CURSOR_NONE 0
300 #define FB_TILE_CURSOR_UNDERLINE 1
301 #define FB_TILE_CURSOR_LOWER_THIRD 2
302 #define FB_TILE_CURSOR_LOWER_HALF 3
303 #define FB_TILE_CURSOR_TWO_THIRDS 4
304 #define FB_TILE_CURSOR_BLOCK 5
305
306 struct fb_tilemap {
307 __u32 width; /* width of each tile in pixels */
308 __u32 height; /* height of each tile in scanlines */
309 __u32 depth; /* color depth of each tile */
310 __u32 length; /* number of tiles in the map */
311 const __u8 *data; /* actual tile map: a bitmap array, packed
312 to the nearest byte */
313 };
314
315 struct fb_tilerect {
316 __u32 sx; /* origin in the x-axis */
317 __u32 sy; /* origin in the y-axis */
318 __u32 width; /* number of tiles in the x-axis */
319 __u32 height; /* number of tiles in the y-axis */
320 __u32 index; /* what tile to use: index to tile map */
321 __u32 fg; /* foreground color */
322 __u32 bg; /* background color */
323 __u32 rop; /* raster operation */
324 };
325
326 struct fb_tilearea {
327 __u32 sx; /* source origin in the x-axis */
328 __u32 sy; /* source origin in the y-axis */
329 __u32 dx; /* destination origin in the x-axis */
330 __u32 dy; /* destination origin in the y-axis */
331 __u32 width; /* number of tiles in the x-axis */
332 __u32 height; /* number of tiles in the y-axis */
333 };
334
335 struct fb_tileblit {
336 __u32 sx; /* origin in the x-axis */
337 __u32 sy; /* origin in the y-axis */
338 __u32 width; /* number of tiles in the x-axis */
339 __u32 height; /* number of tiles in the y-axis */
340 __u32 fg; /* foreground color */
341 __u32 bg; /* background color */
342 __u32 length; /* number of tiles to draw */
343 __u32 *indices; /* array of indices to tile map */
344 };
345
346 struct fb_tilecursor {
347 __u32 sx; /* cursor position in the x-axis */
348 __u32 sy; /* cursor position in the y-axis */
349 __u32 mode; /* 0 = erase, 1 = draw */
350 __u32 shape; /* see FB_TILE_CURSOR_* */
351 __u32 fg; /* foreground color */
352 __u32 bg; /* background color */
353 };
354
355 struct fb_tile_ops {
356 /* set tile characteristics */
357 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
358
359 /* all dimensions from hereon are in terms of tiles */
360
361 /* move a rectangular region of tiles from one area to another*/
362 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
363 /* fill a rectangular region with a tile */
364 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
365 /* copy an array of tiles */
366 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
367 /* cursor */
368 void (*fb_tilecursor)(struct fb_info *info,
369 struct fb_tilecursor *cursor);
370 /* get maximum length of the tile map */
371 int (*fb_get_tilemax)(struct fb_info *info);
372 };
373 #endif /* CONFIG_FB_TILEBLITTING */
374
375 /* FBINFO_* = fb_info.flags bit flags */
376 #define FBINFO_DEFAULT 0
377 #define FBINFO_HWACCEL_DISABLED 0x0002
378 /* When FBINFO_HWACCEL_DISABLED is set:
379 * Hardware acceleration is turned off. Software implementations
380 * of required functions (copyarea(), fillrect(), and imageblit())
381 * takes over; acceleration engine should be in a quiescent state */
382
383 /* hints */
384 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
385 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
386 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
387
388 /* hardware supported ops */
389 /* semantics: when a bit is set, it indicates that the operation is
390 * accelerated by hardware.
391 * required functions will still work even if the bit is not set.
392 * optional functions may not even exist if the flag bit is not set.
393 */
394 #define FBINFO_HWACCEL_NONE 0x0000
395 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
396 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
397 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
398 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
399 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
400 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
401 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
402
403 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
404
405 /* A driver may set this flag to indicate that it does want a set_par to be
406 * called every time when fbcon_switch is executed. The advantage is that with
407 * this flag set you can really be sure that set_par is always called before
408 * any of the functions dependent on the correct hardware state or altering
409 * that state, even if you are using some broken X releases. The disadvantage
410 * is that it introduces unwanted delays to every console switch if set_par
411 * is slow. It is a good idea to try this flag in the drivers initialization
412 * code whenever there is a bug report related to switching between X and the
413 * framebuffer console.
414 */
415 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000
416
417 /* where the fb is a firmware driver, and can be replaced with a proper one */
418 #define FBINFO_MISC_FIRMWARE 0x80000
419 /*
420 * Host and GPU endianness differ.
421 */
422 #define FBINFO_FOREIGN_ENDIAN 0x100000
423 /*
424 * Big endian math. This is the same flags as above, but with different
425 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
426 * and host endianness. Drivers should not use this flag.
427 */
428 #define FBINFO_BE_MATH 0x100000
429 /*
430 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
431 * drivers to stop userspace from trying to share buffers behind the kernel's
432 * back. Instead dma-buf based buffer sharing should be used.
433 */
434 #define FBINFO_HIDE_SMEM_START 0x200000
435
436
437 struct fb_info {
438 atomic_t count;
439 int node;
440 int flags;
441 /*
442 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
443 * a lcd is not mounted upright and fbcon should rotate to compensate.
444 */
445 int fbcon_rotate_hint;
446 struct mutex lock; /* Lock for open/release/ioctl funcs */
447 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
448 struct fb_var_screeninfo var; /* Current var */
449 struct fb_fix_screeninfo fix; /* Current fix */
450 struct fb_monspecs monspecs; /* Current Monitor specs */
451 struct work_struct queue; /* Framebuffer event queue */
452 struct fb_pixmap pixmap; /* Image hardware mapper */
453 struct fb_pixmap sprite; /* Cursor hardware mapper */
454 struct fb_cmap cmap; /* Current cmap */
455 struct list_head modelist; /* mode list */
456 struct fb_videomode *mode; /* current mode */
457
458 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
459 /* assigned backlight device */
460 /* set before framebuffer registration,
461 remove after unregister */
462 struct backlight_device *bl_dev;
463
464 /* Backlight level curve */
465 struct mutex bl_curve_mutex;
466 u8 bl_curve[FB_BACKLIGHT_LEVELS];
467 #endif
468 #ifdef CONFIG_FB_DEFERRED_IO
469 struct delayed_work deferred_work;
470 struct fb_deferred_io *fbdefio;
471 #endif
472
473 const struct fb_ops *fbops;
474 struct device *device; /* This is the parent */
475 struct device *dev; /* This is this fb device */
476 int class_flag; /* private sysfs flags */
477 #ifdef CONFIG_FB_TILEBLITTING
478 struct fb_tile_ops *tileops; /* Tile Blitting */
479 #endif
480 union {
481 char __iomem *screen_base; /* Virtual address */
482 char *screen_buffer;
483 };
484 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
485 void *pseudo_palette; /* Fake palette of 16 colors */
486 #define FBINFO_STATE_RUNNING 0
487 #define FBINFO_STATE_SUSPENDED 1
488 u32 state; /* Hardware state i.e suspend */
489 void *fbcon_par; /* fbcon use-only private area */
490 /* From here on everything is device dependent */
491 void *par;
492 /* we need the PCI or similar aperture base/size not
493 smem_start/size as smem_start may just be an object
494 allocated inside the aperture so may not actually overlap */
495 struct apertures_struct {
496 unsigned int count;
497 struct aperture {
498 resource_size_t base;
499 resource_size_t size;
500 } ranges[0];
501 } *apertures;
502
503 bool skip_vt_switch; /* no VT switch on suspend/resume required */
504 };
505
alloc_apertures(unsigned int max_num)506 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
507 struct apertures_struct *a;
508
509 a = kzalloc(struct_size(a, ranges, max_num), GFP_KERNEL);
510 if (!a)
511 return NULL;
512 a->count = max_num;
513 return a;
514 }
515
516 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
517
518 /* This will go away
519 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
520 * when it wants to turn the acceleration engine on. This is
521 * really a separate operation, and should be modified via sysfs.
522 * But for now, we leave it broken with the following define
523 */
524 #define STUPID_ACCELF_TEXT_SHIT
525
526 // This will go away
527 #if defined(__sparc__)
528
529 /* We map all of our framebuffers such that big-endian accesses
530 * are what we want, so the following is sufficient.
531 */
532
533 // This will go away
534 #define fb_readb sbus_readb
535 #define fb_readw sbus_readw
536 #define fb_readl sbus_readl
537 #define fb_readq sbus_readq
538 #define fb_writeb sbus_writeb
539 #define fb_writew sbus_writew
540 #define fb_writel sbus_writel
541 #define fb_writeq sbus_writeq
542 #define fb_memset sbus_memset_io
543 #define fb_memcpy_fromfb sbus_memcpy_fromio
544 #define fb_memcpy_tofb sbus_memcpy_toio
545
546 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
547 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
548 defined(__arm__) || defined(__aarch64__)
549
550 #define fb_readb __raw_readb
551 #define fb_readw __raw_readw
552 #define fb_readl __raw_readl
553 #define fb_readq __raw_readq
554 #define fb_writeb __raw_writeb
555 #define fb_writew __raw_writew
556 #define fb_writel __raw_writel
557 #define fb_writeq __raw_writeq
558 #define fb_memset memset_io
559 #define fb_memcpy_fromfb memcpy_fromio
560 #define fb_memcpy_tofb memcpy_toio
561
562 #else
563
564 #define fb_readb(addr) (*(volatile u8 *) (addr))
565 #define fb_readw(addr) (*(volatile u16 *) (addr))
566 #define fb_readl(addr) (*(volatile u32 *) (addr))
567 #define fb_readq(addr) (*(volatile u64 *) (addr))
568 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
569 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
570 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
571 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
572 #define fb_memset memset
573 #define fb_memcpy_fromfb memcpy
574 #define fb_memcpy_tofb memcpy
575
576 #endif
577
578 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
579 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
580 (val) << (bits))
581 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
582 (val) >> (bits))
583
584 /*
585 * `Generic' versions of the frame buffer device operations
586 */
587
588 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
589 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
590 extern int fb_blank(struct fb_info *info, int blank);
591 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
592 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
593 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
594 /*
595 * Drawing operations where framebuffer is in system RAM
596 */
597 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
598 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
599 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
600 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
601 size_t count, loff_t *ppos);
602 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
603 size_t count, loff_t *ppos);
604
605 /* drivers/video/fbmem.c */
606 extern int register_framebuffer(struct fb_info *fb_info);
607 extern void unregister_framebuffer(struct fb_info *fb_info);
608 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
609 const char *name);
610 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
611 const char *name, bool primary);
612 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
613 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
614 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
615 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
616 u32 height, u32 shift_high, u32 shift_low, u32 mod);
617 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
618 extern void fb_set_suspend(struct fb_info *info, int state);
619 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
620 struct fb_fix_screeninfo *fix);
621 extern int fb_get_options(const char *name, char **option);
622 extern int fb_new_modelist(struct fb_info *info);
623
624 extern struct fb_info *registered_fb[FB_MAX];
625 extern int num_registered_fb;
626 extern bool fb_center_logo;
627 extern int fb_logo_count;
628 extern struct class *fb_class;
629
630 #define for_each_registered_fb(i) \
631 for (i = 0; i < FB_MAX; i++) \
632 if (!registered_fb[i]) {} else
633
lock_fb_info(struct fb_info * info)634 static inline void lock_fb_info(struct fb_info *info)
635 {
636 mutex_lock(&info->lock);
637 }
638
unlock_fb_info(struct fb_info * info)639 static inline void unlock_fb_info(struct fb_info *info)
640 {
641 mutex_unlock(&info->lock);
642 }
643
__fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)644 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
645 u8 *src, u32 s_pitch, u32 height)
646 {
647 u32 i, j;
648
649 d_pitch -= s_pitch;
650
651 for (i = height; i--; ) {
652 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
653 for (j = 0; j < s_pitch; j++)
654 *dst++ = *src++;
655 dst += d_pitch;
656 }
657 }
658
659 /* drivers/video/fb_defio.c */
660 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
661 extern void fb_deferred_io_init(struct fb_info *info);
662 extern void fb_deferred_io_open(struct fb_info *info,
663 struct inode *inode,
664 struct file *file);
665 extern void fb_deferred_io_cleanup(struct fb_info *info);
666 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
667 loff_t end, int datasync);
668
fb_be_math(struct fb_info * info)669 static inline bool fb_be_math(struct fb_info *info)
670 {
671 #ifdef CONFIG_FB_FOREIGN_ENDIAN
672 #if defined(CONFIG_FB_BOTH_ENDIAN)
673 return info->flags & FBINFO_BE_MATH;
674 #elif defined(CONFIG_FB_BIG_ENDIAN)
675 return true;
676 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
677 return false;
678 #endif /* CONFIG_FB_BOTH_ENDIAN */
679 #else
680 #ifdef __BIG_ENDIAN
681 return true;
682 #else
683 return false;
684 #endif /* __BIG_ENDIAN */
685 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
686 }
687
688 /* drivers/video/fbsysfs.c */
689 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
690 extern void framebuffer_release(struct fb_info *info);
691 extern int fb_init_device(struct fb_info *fb_info);
692 extern void fb_cleanup_device(struct fb_info *head);
693 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
694
695 /* drivers/video/fbmon.c */
696 #define FB_MAXTIMINGS 0
697 #define FB_VSYNCTIMINGS 1
698 #define FB_HSYNCTIMINGS 2
699 #define FB_DCLKTIMINGS 3
700 #define FB_IGNOREMON 0x100
701
702 #define FB_MODE_IS_UNKNOWN 0
703 #define FB_MODE_IS_DETAILED 1
704 #define FB_MODE_IS_STANDARD 2
705 #define FB_MODE_IS_VESA 4
706 #define FB_MODE_IS_CALCULATED 8
707 #define FB_MODE_IS_FIRST 16
708 #define FB_MODE_IS_FROM_VAR 32
709
710 extern int fbmon_dpms(const struct fb_info *fb_info);
711 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
712 struct fb_info *info);
713 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
714 struct fb_info *info);
715 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
716 extern const unsigned char *fb_firmware_edid(struct device *device);
717 extern void fb_edid_to_monspecs(unsigned char *edid,
718 struct fb_monspecs *specs);
719 extern void fb_destroy_modedb(struct fb_videomode *modedb);
720 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
721 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
722
723 extern int of_get_fb_videomode(struct device_node *np,
724 struct fb_videomode *fb,
725 int index);
726 extern int fb_videomode_from_videomode(const struct videomode *vm,
727 struct fb_videomode *fbmode);
728
729 /* drivers/video/modedb.c */
730 #define VESA_MODEDB_SIZE 43
731 #define DMT_SIZE 0x50
732
733 extern void fb_var_to_videomode(struct fb_videomode *mode,
734 const struct fb_var_screeninfo *var);
735 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
736 const struct fb_videomode *mode);
737 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
738 const struct fb_videomode *mode2);
739 extern int fb_add_videomode(const struct fb_videomode *mode,
740 struct list_head *head);
741 extern void fb_delete_videomode(const struct fb_videomode *mode,
742 struct list_head *head);
743 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
744 struct list_head *head);
745 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
746 struct list_head *head);
747 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
748 struct list_head *head);
749 extern void fb_destroy_modelist(struct list_head *head);
750 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
751 struct list_head *head);
752 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
753 struct list_head *head);
754
755 /* drivers/video/fbcmap.c */
756 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
757 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
758 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
759 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
760 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
761 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
762 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
763 extern const struct fb_cmap *fb_default_cmap(int len);
764 extern void fb_invert_cmaps(void);
765
766 struct fb_videomode {
767 const char *name; /* optional */
768 u32 refresh; /* optional */
769 u32 xres;
770 u32 yres;
771 u32 pixclock;
772 u32 left_margin;
773 u32 right_margin;
774 u32 upper_margin;
775 u32 lower_margin;
776 u32 hsync_len;
777 u32 vsync_len;
778 u32 sync;
779 u32 vmode;
780 u32 flag;
781 };
782
783 struct dmt_videomode {
784 u32 dmt_id;
785 u32 std_2byte_code;
786 u32 cvt_3byte_code;
787 const struct fb_videomode *mode;
788 };
789
790 extern const char *fb_mode_option;
791 extern const struct fb_videomode vesa_modes[];
792 extern const struct dmt_videomode dmt_modes[];
793
794 struct fb_modelist {
795 struct list_head list;
796 struct fb_videomode mode;
797 };
798
799 extern int fb_find_mode(struct fb_var_screeninfo *var,
800 struct fb_info *info, const char *mode_option,
801 const struct fb_videomode *db,
802 unsigned int dbsize,
803 const struct fb_videomode *default_mode,
804 unsigned int default_bpp);
805
806 /* Convenience logging macros */
807 #define fb_err(fb_info, fmt, ...) \
808 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
809 #define fb_notice(info, fmt, ...) \
810 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
811 #define fb_warn(fb_info, fmt, ...) \
812 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
813 #define fb_info(fb_info, fmt, ...) \
814 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
815 #define fb_dbg(fb_info, fmt, ...) \
816 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
817
818 #endif /* _LINUX_FB_H */
819