projects/linux·blob v5.8 · refs

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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
19struct vm_area_struct;
20struct fb_info;
21struct device;
22struct file;
23struct videomode;
24struct 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
52struct 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
63struct 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
93struct 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
102struct 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
114struct 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
139struct fb_event {
140 struct fb_info *info;
141 void *data;
142};
143
144struct fb_blit_caps {
145 u32 x;
146 u32 y;
147 u32 len;
148 u32 flags;
149};
150
151#ifdef CONFIG_FB_NOTIFY
152extern int fb_register_client(struct notifier_block *nb);
153extern int fb_unregister_client(struct notifier_block *nb);
154extern int fb_notifier_call_chain(unsigned long val, void *v);
155#else
156static inline int fb_register_client(struct notifier_block *nb)
157{
158 return 0;
159};
160
161static inline int fb_unregister_client(struct notifier_block *nb)
162{
163 return 0;
164};
165
166static 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
185struct 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
203struct 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
228struct 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
306struct 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
315struct 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
326struct 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
335struct 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
346struct 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
355struct 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_USEREVENT 0x10000 /* event request
404 from userspace */
405#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
406
407/* A driver may set this flag to indicate that it does want a set_par to be
408 * called every time when fbcon_switch is executed. The advantage is that with
409 * this flag set you can really be sure that set_par is always called before
410 * any of the functions dependent on the correct hardware state or altering
411 * that state, even if you are using some broken X releases. The disadvantage
412 * is that it introduces unwanted delays to every console switch if set_par
413 * is slow. It is a good idea to try this flag in the drivers initialization
414 * code whenever there is a bug report related to switching between X and the
415 * framebuffer console.
416 */
417#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
418
419/* where the fb is a firmware driver, and can be replaced with a proper one */
420#define FBINFO_MISC_FIRMWARE 0x80000
421/*
422 * Host and GPU endianness differ.
423 */
424#define FBINFO_FOREIGN_ENDIAN 0x100000
425/*
426 * Big endian math. This is the same flags as above, but with different
427 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
428 * and host endianness. Drivers should not use this flag.
429 */
430#define FBINFO_BE_MATH 0x100000
431/*
432 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
433 * drivers to stop userspace from trying to share buffers behind the kernel's
434 * back. Instead dma-buf based buffer sharing should be used.
435 */
436#define FBINFO_HIDE_SMEM_START 0x200000
437
438
439struct fb_info {
440 atomic_t count;
441 int node;
442 int flags;
443 /*
444 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
445 * a lcd is not mounted upright and fbcon should rotate to compensate.
446 */
447 int fbcon_rotate_hint;
448 struct mutex lock; /* Lock for open/release/ioctl funcs */
449 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
450 struct fb_var_screeninfo var; /* Current var */
451 struct fb_fix_screeninfo fix; /* Current fix */
452 struct fb_monspecs monspecs; /* Current Monitor specs */
453 struct work_struct queue; /* Framebuffer event queue */
454 struct fb_pixmap pixmap; /* Image hardware mapper */
455 struct fb_pixmap sprite; /* Cursor hardware mapper */
456 struct fb_cmap cmap; /* Current cmap */
457 struct list_head modelist; /* mode list */
458 struct fb_videomode *mode; /* current mode */
459
460#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
461 /* assigned backlight device */
462 /* set before framebuffer registration,
463 remove after unregister */
464 struct backlight_device *bl_dev;
465
466 /* Backlight level curve */
467 struct mutex bl_curve_mutex;
468 u8 bl_curve[FB_BACKLIGHT_LEVELS];
469#endif
470#ifdef CONFIG_FB_DEFERRED_IO
471 struct delayed_work deferred_work;
472 struct fb_deferred_io *fbdefio;
473#endif
474
475 const struct fb_ops *fbops;
476 struct device *device; /* This is the parent */
477 struct device *dev; /* This is this fb device */
478 int class_flag; /* private sysfs flags */
479#ifdef CONFIG_FB_TILEBLITTING
480 struct fb_tile_ops *tileops; /* Tile Blitting */
481#endif
482 union {
483 char __iomem *screen_base; /* Virtual address */
484 char *screen_buffer;
485 };
486 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
487 void *pseudo_palette; /* Fake palette of 16 colors */
488#define FBINFO_STATE_RUNNING 0
489#define FBINFO_STATE_SUSPENDED 1
490 u32 state; /* Hardware state i.e suspend */
491 void *fbcon_par; /* fbcon use-only private area */
492 /* From here on everything is device dependent */
493 void *par;
494 /* we need the PCI or similar aperture base/size not
495 smem_start/size as smem_start may just be an object
496 allocated inside the aperture so may not actually overlap */
497 struct apertures_struct {
498 unsigned int count;
499 struct aperture {
500 resource_size_t base;
501 resource_size_t size;
502 } ranges[0];
503 } *apertures;
504
505 bool skip_vt_switch; /* no VT switch on suspend/resume required */
506};
507
508static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
509 struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
510 + max_num * sizeof(struct aperture), GFP_KERNEL);
511 if (!a)
512 return NULL;
513 a->count = max_num;
514 return a;
515}
516
517#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
518
519/* This will go away
520 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
521 * when it wants to turn the acceleration engine on. This is
522 * really a separate operation, and should be modified via sysfs.
523 * But for now, we leave it broken with the following define
524 */
525#define STUPID_ACCELF_TEXT_SHIT
526
527// This will go away
528#if defined(__sparc__)
529
530/* We map all of our framebuffers such that big-endian accesses
531 * are what we want, so the following is sufficient.
532 */
533
534// This will go away
535#define fb_readb sbus_readb
536#define fb_readw sbus_readw
537#define fb_readl sbus_readl
538#define fb_readq sbus_readq
539#define fb_writeb sbus_writeb
540#define fb_writew sbus_writew
541#define fb_writel sbus_writel
542#define fb_writeq sbus_writeq
543#define fb_memset sbus_memset_io
544#define fb_memcpy_fromfb sbus_memcpy_fromio
545#define fb_memcpy_tofb sbus_memcpy_toio
546
547#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
548 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
549 defined(__arm__) || defined(__aarch64__)
550
551#define fb_readb __raw_readb
552#define fb_readw __raw_readw
553#define fb_readl __raw_readl
554#define fb_readq __raw_readq
555#define fb_writeb __raw_writeb
556#define fb_writew __raw_writew
557#define fb_writel __raw_writel
558#define fb_writeq __raw_writeq
559#define fb_memset memset_io
560#define fb_memcpy_fromfb memcpy_fromio
561#define fb_memcpy_tofb memcpy_toio
562
563#else
564
565#define fb_readb(addr) (*(volatile u8 *) (addr))
566#define fb_readw(addr) (*(volatile u16 *) (addr))
567#define fb_readl(addr) (*(volatile u32 *) (addr))
568#define fb_readq(addr) (*(volatile u64 *) (addr))
569#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
570#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
571#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
572#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
573#define fb_memset memset
574#define fb_memcpy_fromfb memcpy
575#define fb_memcpy_tofb memcpy
576
577#endif
578
579#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
580#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
581 (val) << (bits))
582#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
583 (val) >> (bits))
584
585 /*
586 * `Generic' versions of the frame buffer device operations
587 */
588
589extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
590extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
591extern int fb_blank(struct fb_info *info, int blank);
592extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
593extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
594extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
595/*
596 * Drawing operations where framebuffer is in system RAM
597 */
598extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
599extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
600extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
601extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
602 size_t count, loff_t *ppos);
603extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
604 size_t count, loff_t *ppos);
605
606/* drivers/video/fbmem.c */
607extern int register_framebuffer(struct fb_info *fb_info);
608extern void unregister_framebuffer(struct fb_info *fb_info);
609extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
610 const char *name);
611extern int remove_conflicting_framebuffers(struct apertures_struct *a,
612 const char *name, bool primary);
613extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
614extern int fb_show_logo(struct fb_info *fb_info, int rotate);
615extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
616extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
617 u32 height, u32 shift_high, u32 shift_low, u32 mod);
618extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
619extern void fb_set_suspend(struct fb_info *info, int state);
620extern int fb_get_color_depth(struct fb_var_screeninfo *var,
621 struct fb_fix_screeninfo *fix);
622extern int fb_get_options(const char *name, char **option);
623extern int fb_new_modelist(struct fb_info *info);
624
625extern struct fb_info *registered_fb[FB_MAX];
626extern int num_registered_fb;
627extern bool fb_center_logo;
628extern int fb_logo_count;
629extern struct class *fb_class;
630
631#define for_each_registered_fb(i) \
632 for (i = 0; i < FB_MAX; i++) \
633 if (!registered_fb[i]) {} else
634
635static inline void lock_fb_info(struct fb_info *info)
636{
637 mutex_lock(&info->lock);
638}
639
640static inline void unlock_fb_info(struct fb_info *info)
641{
642 mutex_unlock(&info->lock);
643}
644
645static 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 */
661int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
662extern void fb_deferred_io_init(struct fb_info *info);
663extern void fb_deferred_io_open(struct fb_info *info,
664 struct inode *inode,
665 struct file *file);
666extern void fb_deferred_io_cleanup(struct fb_info *info);
667extern int fb_deferred_io_fsync(struct file *file, loff_t start,
668 loff_t end, int datasync);
669
670static inline bool fb_be_math(struct fb_info *info)
671{
672#ifdef CONFIG_FB_FOREIGN_ENDIAN
673#if defined(CONFIG_FB_BOTH_ENDIAN)
674 return info->flags & FBINFO_BE_MATH;
675#elif defined(CONFIG_FB_BIG_ENDIAN)
676 return true;
677#elif defined(CONFIG_FB_LITTLE_ENDIAN)
678 return false;
679#endif /* CONFIG_FB_BOTH_ENDIAN */
680#else
681#ifdef __BIG_ENDIAN
682 return true;
683#else
684 return false;
685#endif /* __BIG_ENDIAN */
686#endif /* CONFIG_FB_FOREIGN_ENDIAN */
687}
688
689/* drivers/video/fbsysfs.c */
690extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
691extern void framebuffer_release(struct fb_info *info);
692extern int fb_init_device(struct fb_info *fb_info);
693extern void fb_cleanup_device(struct fb_info *head);
694extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
695
696/* drivers/video/fbmon.c */
697#define FB_MAXTIMINGS 0
698#define FB_VSYNCTIMINGS 1
699#define FB_HSYNCTIMINGS 2
700#define FB_DCLKTIMINGS 3
701#define FB_IGNOREMON 0x100
702
703#define FB_MODE_IS_UNKNOWN 0
704#define FB_MODE_IS_DETAILED 1
705#define FB_MODE_IS_STANDARD 2
706#define FB_MODE_IS_VESA 4
707#define FB_MODE_IS_CALCULATED 8
708#define FB_MODE_IS_FIRST 16
709#define FB_MODE_IS_FROM_VAR 32
710
711extern int fbmon_dpms(const struct fb_info *fb_info);
712extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
713 struct fb_info *info);
714extern int fb_validate_mode(const struct fb_var_screeninfo *var,
715 struct fb_info *info);
716extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
717extern const unsigned char *fb_firmware_edid(struct device *device);
718extern void fb_edid_to_monspecs(unsigned char *edid,
719 struct fb_monspecs *specs);
720extern void fb_destroy_modedb(struct fb_videomode *modedb);
721extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
722extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
723
724extern int of_get_fb_videomode(struct device_node *np,
725 struct fb_videomode *fb,
726 int index);
727extern int fb_videomode_from_videomode(const struct videomode *vm,
728 struct fb_videomode *fbmode);
729
730/* drivers/video/modedb.c */
731#define VESA_MODEDB_SIZE 43
732#define DMT_SIZE 0x50
733
734extern void fb_var_to_videomode(struct fb_videomode *mode,
735 const struct fb_var_screeninfo *var);
736extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
737 const struct fb_videomode *mode);
738extern int fb_mode_is_equal(const struct fb_videomode *mode1,
739 const struct fb_videomode *mode2);
740extern int fb_add_videomode(const struct fb_videomode *mode,
741 struct list_head *head);
742extern void fb_delete_videomode(const struct fb_videomode *mode,
743 struct list_head *head);
744extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
745 struct list_head *head);
746extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
747 struct list_head *head);
748extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
749 struct list_head *head);
750extern void fb_destroy_modelist(struct list_head *head);
751extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
752 struct list_head *head);
753extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
754 struct list_head *head);
755
756/* drivers/video/fbcmap.c */
757extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
758extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
759extern void fb_dealloc_cmap(struct fb_cmap *cmap);
760extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
761extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
762extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
763extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
764extern const struct fb_cmap *fb_default_cmap(int len);
765extern void fb_invert_cmaps(void);
766
767struct fb_videomode {
768 const char *name; /* optional */
769 u32 refresh; /* optional */
770 u32 xres;
771 u32 yres;
772 u32 pixclock;
773 u32 left_margin;
774 u32 right_margin;
775 u32 upper_margin;
776 u32 lower_margin;
777 u32 hsync_len;
778 u32 vsync_len;
779 u32 sync;
780 u32 vmode;
781 u32 flag;
782};
783
784struct dmt_videomode {
785 u32 dmt_id;
786 u32 std_2byte_code;
787 u32 cvt_3byte_code;
788 const struct fb_videomode *mode;
789};
790
791extern const char *fb_mode_option;
792extern const struct fb_videomode vesa_modes[];
793extern const struct dmt_videomode dmt_modes[];
794
795struct fb_modelist {
796 struct list_head list;
797 struct fb_videomode mode;
798};
799
800extern int fb_find_mode(struct fb_var_screeninfo *var,
801 struct fb_info *info, const char *mode_option,
802 const struct fb_videomode *db,
803 unsigned int dbsize,
804 const struct fb_videomode *default_mode,
805 unsigned int default_bpp);
806
807/* Convenience logging macros */
808#define fb_err(fb_info, fmt, ...) \
809 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
810#define fb_notice(info, fmt, ...) \
811 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
812#define fb_warn(fb_info, fmt, ...) \
813 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
814#define fb_info(fb_info, fmt, ...) \
815 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
816#define fb_dbg(fb_info, fmt, ...) \
817 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
818
819#endif /* _LINUX_FB_H */