Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_FB_H
3#define _LINUX_FB_H
4
5#include <uapi/linux/fb.h>
6
7#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
8
9#include <linux/mutex.h>
10#include <linux/printk.h>
11#include <linux/refcount.h>
12#include <linux/types.h>
13#include <linux/workqueue.h>
14
15#include <asm/video.h>
16
17struct backlight_device;
18struct device;
19struct device_node;
20struct fb_info;
21struct file;
22struct i2c_adapter;
23struct inode;
24struct lcd_device;
25struct module;
26struct notifier_block;
27struct page;
28struct videomode;
29struct vm_area_struct;
30
31/* Definitions below are used in the parsed monitor specs */
32#define FB_DPMS_ACTIVE_OFF 1
33#define FB_DPMS_SUSPEND 2
34#define FB_DPMS_STANDBY 4
35
36#define FB_DISP_DDI 1
37#define FB_DISP_ANA_700_300 2
38#define FB_DISP_ANA_714_286 4
39#define FB_DISP_ANA_1000_400 8
40#define FB_DISP_ANA_700_000 16
41
42#define FB_DISP_MONO 32
43#define FB_DISP_RGB 64
44#define FB_DISP_MULTI 128
45#define FB_DISP_UNKNOWN 256
46
47#define FB_SIGNAL_NONE 0
48#define FB_SIGNAL_BLANK_BLANK 1
49#define FB_SIGNAL_SEPARATE 2
50#define FB_SIGNAL_COMPOSITE 4
51#define FB_SIGNAL_SYNC_ON_GREEN 8
52#define FB_SIGNAL_SERRATION_ON 16
53
54#define FB_MISC_PRIM_COLOR 1
55#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
56#define FB_MISC_HDMI 4
57struct fb_chroma {
58 __u32 redx; /* in fraction of 1024 */
59 __u32 greenx;
60 __u32 bluex;
61 __u32 whitex;
62 __u32 redy;
63 __u32 greeny;
64 __u32 bluey;
65 __u32 whitey;
66};
67
68struct fb_monspecs {
69 struct fb_chroma chroma;
70 struct fb_videomode *modedb; /* mode database */
71 __u8 manufacturer[4]; /* Manufacturer */
72 __u8 monitor[14]; /* Monitor String */
73 __u8 serial_no[14]; /* Serial Number */
74 __u8 ascii[14]; /* ? */
75 __u32 modedb_len; /* mode database length */
76 __u32 model; /* Monitor Model */
77 __u32 serial; /* Serial Number - Integer */
78 __u32 year; /* Year manufactured */
79 __u32 week; /* Week Manufactured */
80 __u32 hfmin; /* hfreq lower limit (Hz) */
81 __u32 hfmax; /* hfreq upper limit (Hz) */
82 __u32 dclkmin; /* pixelclock lower limit (Hz) */
83 __u32 dclkmax; /* pixelclock upper limit (Hz) */
84 __u16 input; /* display type - see FB_DISP_* */
85 __u16 dpms; /* DPMS support - see FB_DPMS_ */
86 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
87 __u16 vfmin; /* vfreq lower limit (Hz) */
88 __u16 vfmax; /* vfreq upper limit (Hz) */
89 __u16 gamma; /* Gamma - in fractions of 100 */
90 __u16 gtf : 1; /* supports GTF */
91 __u16 misc; /* Misc flags - see FB_MISC_* */
92 __u8 version; /* EDID version... */
93 __u8 revision; /* ...and revision */
94 __u8 max_x; /* Maximum horizontal size (cm) */
95 __u8 max_y; /* Maximum vertical size (cm) */
96};
97
98struct fb_cmap_user {
99 __u32 start; /* First entry */
100 __u32 len; /* Number of entries */
101 __u16 __user *red; /* Red values */
102 __u16 __user *green;
103 __u16 __user *blue;
104 __u16 __user *transp; /* transparency, can be NULL */
105};
106
107struct fb_image_user {
108 __u32 dx; /* Where to place image */
109 __u32 dy;
110 __u32 width; /* Size of image */
111 __u32 height;
112 __u32 fg_color; /* Only used when a mono bitmap */
113 __u32 bg_color;
114 __u8 depth; /* Depth of the image */
115 const char __user *data; /* Pointer to image data */
116 struct fb_cmap_user cmap; /* color map info */
117};
118
119struct fb_cursor_user {
120 __u16 set; /* what to set */
121 __u16 enable; /* cursor on/off */
122 __u16 rop; /* bitop operation */
123 const char __user *mask; /* cursor mask bits */
124 struct fbcurpos hot; /* cursor hot spot */
125 struct fb_image_user image; /* Cursor image */
126};
127
128/*
129 * Register/unregister for framebuffer events
130 */
131
132#ifdef CONFIG_GUMSTIX_AM200EPD
133/* only used by mach-pxa/am200epd.c */
134#define FB_EVENT_FB_REGISTERED 0x05
135#define FB_EVENT_FB_UNREGISTERED 0x06
136#endif
137
138struct fb_event {
139 struct fb_info *info;
140 void *data;
141};
142
143/* Enough for the VT console needs, see its max_font_width/height */
144#define FB_MAX_BLIT_WIDTH 64
145#define FB_MAX_BLIT_HEIGHT 128
146
147struct fb_blit_caps {
148 DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH);
149 DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT);
150 u32 len;
151 u32 flags;
152};
153
154#ifdef CONFIG_FB_NOTIFY
155extern int fb_register_client(struct notifier_block *nb);
156extern int fb_unregister_client(struct notifier_block *nb);
157extern int fb_notifier_call_chain(unsigned long val, void *v);
158#else
159static inline int fb_register_client(struct notifier_block *nb)
160{
161 return 0;
162};
163
164static inline int fb_unregister_client(struct notifier_block *nb)
165{
166 return 0;
167};
168
169static inline int fb_notifier_call_chain(unsigned long val, void *v)
170{
171 return 0;
172};
173#endif
174
175/*
176 * Pixmap structure definition
177 *
178 * The purpose of this structure is to translate data
179 * from the hardware independent format of fbdev to what
180 * format the hardware needs.
181 */
182
183#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
184#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
185#define FB_PIXMAP_IO 4 /* memory is iomapped */
186#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
187
188struct fb_pixmap {
189 u8 *addr; /* pointer to memory */
190 u32 size; /* size of buffer in bytes */
191 u32 offset; /* current offset to buffer */
192 u32 buf_align; /* byte alignment of each bitmap */
193 u32 scan_align; /* alignment per scanline */
194 u32 access_align; /* alignment per read/write (bits) */
195 u32 flags; /* see FB_PIXMAP_* */
196 /* supported bit block dimensions */
197 /* Format: test_bit(width - 1, blit_x) */
198 /* test_bit(height - 1, blit_y) */
199 /* if zero, will be set to full (all) */
200 DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH);
201 DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT);
202 /* access methods */
203 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
204 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
205};
206
207#ifdef CONFIG_FB_DEFERRED_IO
208struct fb_deferred_io_pageref {
209 struct page *page;
210 unsigned long offset;
211 /* private */
212 struct list_head list;
213};
214
215struct fb_deferred_io {
216 /* delay between mkwrite and deferred handler */
217 unsigned long delay;
218 bool sort_pagereflist; /* sort pagelist by offset */
219 int open_count; /* number of opened files; protected by fb_info lock */
220 struct mutex lock; /* mutex that protects the pageref list */
221 struct list_head pagereflist; /* list of pagerefs for touched pages */
222 struct address_space *mapping; /* page cache object for fb device */
223 /* callback */
224 struct page *(*get_page)(struct fb_info *info, unsigned long offset);
225 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
226};
227#endif
228
229/*
230 * Frame buffer operations
231 *
232 * LOCKING NOTE: those functions must _ALL_ be called with the console
233 * semaphore held, this is the only suitable locking mechanism we have
234 * in 2.6. Some may be called at interrupt time at this point though.
235 *
236 * The exception to this is the debug related hooks. Putting the fb
237 * into a debug state (e.g. flipping to the kernel console) and restoring
238 * it must be done in a lock-free manner, so low level drivers should
239 * keep track of the initial console (if applicable) and may need to
240 * perform direct, unlocked hardware writes in these hooks.
241 */
242
243struct fb_ops {
244 /* open/release and usage marking */
245 struct module *owner;
246 int (*fb_open)(struct fb_info *info, int user);
247 int (*fb_release)(struct fb_info *info, int user);
248
249 /* For framebuffers with strange non linear layouts or that do not
250 * work with normal memory mapped access
251 */
252 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
253 size_t count, loff_t *ppos);
254 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
255 size_t count, loff_t *ppos);
256
257 /* checks var and eventually tweaks it to something supported,
258 * DO NOT MODIFY PAR */
259 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
260
261 /* set the video mode according to info->var */
262 int (*fb_set_par)(struct fb_info *info);
263
264 /* set color register */
265 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
266 unsigned blue, unsigned transp, struct fb_info *info);
267
268 /* set color registers in batch */
269 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
270
271 /* blank display */
272 int (*fb_blank)(int blank, struct fb_info *info);
273
274 /* pan display */
275 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
276
277 /* Draws a rectangle */
278 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
279 /* Copy data from area to another */
280 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
281 /* Draws a image to the display */
282 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
283
284 /* Draws cursor */
285 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
286
287 /* wait for blit idle, optional */
288 int (*fb_sync)(struct fb_info *info);
289
290 /* perform fb specific ioctl (optional) */
291 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
292 unsigned long arg);
293
294 /* Handle 32bit compat ioctl (optional) */
295 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
296 unsigned long arg);
297
298 /* perform fb specific mmap */
299 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
300
301 /* get capability given var */
302 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
303 struct fb_var_screeninfo *var);
304
305 /* teardown any resources to do with this framebuffer */
306 void (*fb_destroy)(struct fb_info *info);
307
308 /* called at KDB enter and leave time to prepare the console */
309 int (*fb_debug_enter)(struct fb_info *info);
310 int (*fb_debug_leave)(struct fb_info *info);
311};
312
313#ifdef CONFIG_FB_TILEBLITTING
314#define FB_TILE_CURSOR_NONE 0
315#define FB_TILE_CURSOR_UNDERLINE 1
316#define FB_TILE_CURSOR_LOWER_THIRD 2
317#define FB_TILE_CURSOR_LOWER_HALF 3
318#define FB_TILE_CURSOR_TWO_THIRDS 4
319#define FB_TILE_CURSOR_BLOCK 5
320
321struct fb_tilemap {
322 __u32 width; /* width of each tile in pixels */
323 __u32 height; /* height of each tile in scanlines */
324 __u32 depth; /* color depth of each tile */
325 __u32 length; /* number of tiles in the map */
326 const __u8 *data; /* actual tile map: a bitmap array, packed
327 to the nearest byte */
328};
329
330struct fb_tilerect {
331 __u32 sx; /* origin in the x-axis */
332 __u32 sy; /* origin in the y-axis */
333 __u32 width; /* number of tiles in the x-axis */
334 __u32 height; /* number of tiles in the y-axis */
335 __u32 index; /* what tile to use: index to tile map */
336 __u32 fg; /* foreground color */
337 __u32 bg; /* background color */
338 __u32 rop; /* raster operation */
339};
340
341struct fb_tilearea {
342 __u32 sx; /* source origin in the x-axis */
343 __u32 sy; /* source origin in the y-axis */
344 __u32 dx; /* destination origin in the x-axis */
345 __u32 dy; /* destination origin in the y-axis */
346 __u32 width; /* number of tiles in the x-axis */
347 __u32 height; /* number of tiles in the y-axis */
348};
349
350struct fb_tileblit {
351 __u32 sx; /* origin in the x-axis */
352 __u32 sy; /* origin in the y-axis */
353 __u32 width; /* number of tiles in the x-axis */
354 __u32 height; /* number of tiles in the y-axis */
355 __u32 fg; /* foreground color */
356 __u32 bg; /* background color */
357 __u32 length; /* number of tiles to draw */
358 __u32 *indices; /* array of indices to tile map */
359};
360
361struct fb_tilecursor {
362 __u32 sx; /* cursor position in the x-axis */
363 __u32 sy; /* cursor position in the y-axis */
364 __u32 mode; /* 0 = erase, 1 = draw */
365 __u32 shape; /* see FB_TILE_CURSOR_* */
366 __u32 fg; /* foreground color */
367 __u32 bg; /* background color */
368};
369
370struct fb_tile_ops {
371 /* set tile characteristics */
372 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
373
374 /* all dimensions from hereon are in terms of tiles */
375
376 /* move a rectangular region of tiles from one area to another*/
377 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
378 /* fill a rectangular region with a tile */
379 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
380 /* copy an array of tiles */
381 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
382 /* cursor */
383 void (*fb_tilecursor)(struct fb_info *info,
384 struct fb_tilecursor *cursor);
385 /* get maximum length of the tile map */
386 int (*fb_get_tilemax)(struct fb_info *info);
387};
388#endif /* CONFIG_FB_TILEBLITTING */
389
390/* FBINFO_* = fb_info.flags bit flags */
391#define FBINFO_HWACCEL_DISABLED 0x0002
392 /* When FBINFO_HWACCEL_DISABLED is set:
393 * Hardware acceleration is turned off. Software implementations
394 * of required functions (copyarea(), fillrect(), and imageblit())
395 * takes over; acceleration engine should be in a quiescent state */
396
397/* hints */
398#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
399#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
400#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
401
402/* hardware supported ops */
403/* semantics: when a bit is set, it indicates that the operation is
404 * accelerated by hardware.
405 * required functions will still work even if the bit is not set.
406 * optional functions may not even exist if the flag bit is not set.
407 */
408#define FBINFO_HWACCEL_NONE 0x0000
409#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
410#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
411#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
412#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
413#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
414#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
415#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
416
417#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
418
419/* A driver may set this flag to indicate that it does want a set_par to be
420 * called every time when fbcon_switch is executed. The advantage is that with
421 * this flag set you can really be sure that set_par is always called before
422 * any of the functions dependent on the correct hardware state or altering
423 * that state, even if you are using some broken X releases. The disadvantage
424 * is that it introduces unwanted delays to every console switch if set_par
425 * is slow. It is a good idea to try this flag in the drivers initialization
426 * code whenever there is a bug report related to switching between X and the
427 * framebuffer console.
428 */
429#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
430
431/*
432 * Host and GPU endianness differ.
433 */
434#define FBINFO_FOREIGN_ENDIAN 0x100000
435/*
436 * Big endian math. This is the same flags as above, but with different
437 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
438 * and host endianness. Drivers should not use this flag.
439 */
440#define FBINFO_BE_MATH 0x100000
441/*
442 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
443 * drivers to stop userspace from trying to share buffers behind the kernel's
444 * back. Instead dma-buf based buffer sharing should be used.
445 */
446#define FBINFO_HIDE_SMEM_START 0x200000
447
448
449struct fb_info {
450 refcount_t count;
451 int node;
452 int flags;
453 /*
454 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
455 * a lcd is not mounted upright and fbcon should rotate to compensate.
456 */
457 int fbcon_rotate_hint;
458 struct mutex lock; /* Lock for open/release/ioctl funcs */
459 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
460 struct fb_var_screeninfo var; /* Current var */
461 struct fb_fix_screeninfo fix; /* Current fix */
462 struct fb_monspecs monspecs; /* Current Monitor specs */
463 struct fb_pixmap pixmap; /* Image hardware mapper */
464 struct fb_pixmap sprite; /* Cursor hardware mapper */
465 struct fb_cmap cmap; /* Current cmap */
466 struct list_head modelist; /* mode list */
467 struct fb_videomode *mode; /* current mode */
468
469 int blank; /* current blanking; see FB_BLANK_ constants */
470
471#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
472 /* assigned backlight device */
473 /* set before framebuffer registration,
474 remove after unregister */
475 struct backlight_device *bl_dev;
476
477 /* Backlight level curve */
478 struct mutex bl_curve_mutex;
479 u8 bl_curve[FB_BACKLIGHT_LEVELS];
480#endif
481
482 /*
483 * Assigned LCD device; set before framebuffer
484 * registration, remove after unregister
485 */
486 struct lcd_device *lcd_dev;
487
488#ifdef CONFIG_FB_DEFERRED_IO
489 struct delayed_work deferred_work;
490 unsigned long npagerefs;
491 struct fb_deferred_io_pageref *pagerefs;
492 struct fb_deferred_io *fbdefio;
493#endif
494
495 const struct fb_ops *fbops;
496 struct device *device; /* This is the parent */
497#if defined(CONFIG_FB_DEVICE)
498 struct device *dev; /* This is this fb device */
499#endif
500 int class_flag; /* private sysfs flags */
501#ifdef CONFIG_FB_TILEBLITTING
502 struct fb_tile_ops *tileops; /* Tile Blitting */
503#endif
504 union {
505 char __iomem *screen_base; /* Virtual address */
506 char *screen_buffer;
507 };
508 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
509 void *pseudo_palette; /* Fake palette of 16 colors */
510#define FBINFO_STATE_RUNNING 0
511#define FBINFO_STATE_SUSPENDED 1
512 u32 state; /* Hardware state i.e suspend */
513 void *fbcon_par; /* fbcon use-only private area */
514 /* From here on everything is device dependent */
515 void *par;
516
517 bool skip_vt_switch; /* no VT switch on suspend/resume required */
518 bool skip_panic; /* Do not write to the fb after a panic */
519};
520
521/* This will go away
522 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
523 * when it wants to turn the acceleration engine on. This is
524 * really a separate operation, and should be modified via sysfs.
525 * But for now, we leave it broken with the following define
526 */
527#define STUPID_ACCELF_TEXT_SHIT
528
529#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
530#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
531 (val) << (bits))
532#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
533 (val) >> (bits))
534
535 /*
536 * `Generic' versions of the frame buffer device operations
537 */
538
539extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
540extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
541extern int fb_blank(struct fb_info *info, int blank);
542
543/*
544 * Helpers for framebuffers in I/O memory
545 */
546
547extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
548extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
549extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
550extern ssize_t fb_io_read(struct fb_info *info, char __user *buf,
551 size_t count, loff_t *ppos);
552extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf,
553 size_t count, loff_t *ppos);
554int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
555
556#define __FB_DEFAULT_IOMEM_OPS_RDWR \
557 .fb_read = fb_io_read, \
558 .fb_write = fb_io_write
559
560#define __FB_DEFAULT_IOMEM_OPS_DRAW \
561 .fb_fillrect = cfb_fillrect, \
562 .fb_copyarea = cfb_copyarea, \
563 .fb_imageblit = cfb_imageblit
564
565#define __FB_DEFAULT_IOMEM_OPS_MMAP \
566 .fb_mmap = fb_io_mmap
567
568#define FB_DEFAULT_IOMEM_OPS \
569 __FB_DEFAULT_IOMEM_OPS_RDWR, \
570 __FB_DEFAULT_IOMEM_OPS_DRAW, \
571 __FB_DEFAULT_IOMEM_OPS_MMAP
572
573/*
574 * Helpers for framebuffers in system memory
575 */
576
577extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
578extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
579extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
580extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
581 size_t count, loff_t *ppos);
582extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
583 size_t count, loff_t *ppos);
584
585#define __FB_DEFAULT_SYSMEM_OPS_RDWR \
586 .fb_read = fb_sys_read, \
587 .fb_write = fb_sys_write
588
589#define __FB_DEFAULT_SYSMEM_OPS_DRAW \
590 .fb_fillrect = sys_fillrect, \
591 .fb_copyarea = sys_copyarea, \
592 .fb_imageblit = sys_imageblit
593
594/*
595 * Helpers for framebuffers in DMA-able memory
596 */
597
598#define __FB_DEFAULT_DMAMEM_OPS_RDWR \
599 .fb_read = fb_sys_read, \
600 .fb_write = fb_sys_write
601
602#define __FB_DEFAULT_DMAMEM_OPS_DRAW \
603 .fb_fillrect = sys_fillrect, \
604 .fb_copyarea = sys_copyarea, \
605 .fb_imageblit = sys_imageblit
606
607/* fbmem.c */
608extern int register_framebuffer(struct fb_info *fb_info);
609extern void unregister_framebuffer(struct fb_info *fb_info);
610extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info);
611extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
612extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
613 u32 height, u32 shift_high, u32 shift_low, u32 mod);
614extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
615extern void fb_set_suspend(struct fb_info *info, int state);
616extern int fb_get_color_depth(struct fb_var_screeninfo *var,
617 struct fb_fix_screeninfo *fix);
618extern int fb_get_options(const char *name, char **option);
619extern int fb_new_modelist(struct fb_info *info);
620
621static inline void lock_fb_info(struct fb_info *info)
622{
623 mutex_lock(&info->lock);
624}
625
626static inline void unlock_fb_info(struct fb_info *info)
627{
628 mutex_unlock(&info->lock);
629}
630
631static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
632 u8 *src, u32 s_pitch, u32 height)
633{
634 u32 i, j;
635
636 d_pitch -= s_pitch;
637
638 for (i = height; i--; ) {
639 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
640 for (j = 0; j < s_pitch; j++)
641 *dst++ = *src++;
642 dst += d_pitch;
643 }
644}
645
646/* fb_defio.c */
647int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
648extern int fb_deferred_io_init(struct fb_info *info);
649extern void fb_deferred_io_open(struct fb_info *info,
650 struct inode *inode,
651 struct file *file);
652extern void fb_deferred_io_release(struct fb_info *info);
653extern void fb_deferred_io_cleanup(struct fb_info *info);
654extern int fb_deferred_io_fsync(struct file *file, loff_t start,
655 loff_t end, int datasync);
656
657/*
658 * Generate callbacks for deferred I/O
659 */
660
661#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \
662 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \
663 size_t count, loff_t *ppos) \
664 { \
665 return fb_ ## __mode ## _read(info, buf, count, ppos); \
666 } \
667 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \
668 size_t count, loff_t *ppos) \
669 { \
670 unsigned long offset = *ppos; \
671 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \
672 if (ret > 0) \
673 __damage_range(info, offset, ret); \
674 return ret; \
675 }
676
677#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \
678 static void __prefix ## _defio_fillrect(struct fb_info *info, \
679 const struct fb_fillrect *rect) \
680 { \
681 __mode ## _fillrect(info, rect); \
682 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \
683 } \
684 static void __prefix ## _defio_copyarea(struct fb_info *info, \
685 const struct fb_copyarea *area) \
686 { \
687 __mode ## _copyarea(info, area); \
688 __damage_area(info, area->dx, area->dy, area->width, area->height); \
689 } \
690 static void __prefix ## _defio_imageblit(struct fb_info *info, \
691 const struct fb_image *image) \
692 { \
693 __mode ## _imageblit(info, image); \
694 __damage_area(info, image->dx, image->dy, image->width, image->height); \
695 }
696
697#define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \
698 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \
699 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb)
700
701#define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \
702 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
703 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
704
705#define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \
706 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \
707 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys)
708
709/*
710 * Initializes struct fb_ops for deferred I/O.
711 */
712
713#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \
714 .fb_read = __prefix ## _defio_read, \
715 .fb_write = __prefix ## _defio_write
716
717#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \
718 .fb_fillrect = __prefix ## _defio_fillrect, \
719 .fb_copyarea = __prefix ## _defio_copyarea, \
720 .fb_imageblit = __prefix ## _defio_imageblit
721
722#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \
723 .fb_mmap = fb_deferred_io_mmap
724
725#define FB_DEFAULT_DEFERRED_OPS(__prefix) \
726 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \
727 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \
728 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix)
729
730static inline bool fb_be_math(struct fb_info *info)
731{
732#ifdef CONFIG_FB_FOREIGN_ENDIAN
733#if defined(CONFIG_FB_BOTH_ENDIAN)
734 return info->flags & FBINFO_BE_MATH;
735#elif defined(CONFIG_FB_BIG_ENDIAN)
736 return true;
737#elif defined(CONFIG_FB_LITTLE_ENDIAN)
738 return false;
739#endif /* CONFIG_FB_BOTH_ENDIAN */
740#else
741#ifdef __BIG_ENDIAN
742 return true;
743#else
744 return false;
745#endif /* __BIG_ENDIAN */
746#endif /* CONFIG_FB_FOREIGN_ENDIAN */
747}
748
749extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
750extern void framebuffer_release(struct fb_info *info);
751extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
752
753#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
754struct backlight_device *fb_bl_device(struct fb_info *info);
755void fb_bl_notify_blank(struct fb_info *info, int old_blank);
756#else
757static inline struct backlight_device *fb_bl_device(struct fb_info *info)
758{
759 return NULL;
760}
761
762static inline void fb_bl_notify_blank(struct fb_info *info, int old_blank)
763{ }
764#endif
765
766static inline struct lcd_device *fb_lcd_device(struct fb_info *info)
767{
768 return info->lcd_dev;
769}
770
771/* fbmon.c */
772#define FB_MAXTIMINGS 0
773#define FB_VSYNCTIMINGS 1
774#define FB_HSYNCTIMINGS 2
775#define FB_DCLKTIMINGS 3
776#define FB_IGNOREMON 0x100
777
778#define FB_MODE_IS_UNKNOWN 0
779#define FB_MODE_IS_DETAILED 1
780#define FB_MODE_IS_STANDARD 2
781#define FB_MODE_IS_VESA 4
782#define FB_MODE_IS_CALCULATED 8
783#define FB_MODE_IS_FIRST 16
784#define FB_MODE_IS_FROM_VAR 32
785
786extern int fbmon_dpms(const struct fb_info *fb_info);
787extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
788 struct fb_info *info);
789extern int fb_validate_mode(const struct fb_var_screeninfo *var,
790 struct fb_info *info);
791extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
792extern const unsigned char *fb_firmware_edid(struct device *device);
793extern void fb_edid_to_monspecs(unsigned char *edid,
794 struct fb_monspecs *specs);
795extern void fb_destroy_modedb(struct fb_videomode *modedb);
796extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
797extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
798
799extern int of_get_fb_videomode(struct device_node *np,
800 struct fb_videomode *fb,
801 int index);
802extern int fb_videomode_from_videomode(const struct videomode *vm,
803 struct fb_videomode *fbmode);
804
805/* modedb.c */
806#define VESA_MODEDB_SIZE 43
807#define DMT_SIZE 0x50
808
809extern void fb_var_to_videomode(struct fb_videomode *mode,
810 const struct fb_var_screeninfo *var);
811extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
812 const struct fb_videomode *mode);
813extern int fb_mode_is_equal(const struct fb_videomode *mode1,
814 const struct fb_videomode *mode2);
815extern int fb_add_videomode(const struct fb_videomode *mode,
816 struct list_head *head);
817extern void fb_delete_videomode(const struct fb_videomode *mode,
818 struct list_head *head);
819extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
820 struct list_head *head);
821extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
822 struct list_head *head);
823extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
824 struct list_head *head);
825extern void fb_destroy_modelist(struct list_head *head);
826extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
827 struct list_head *head);
828extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
829 struct list_head *head);
830
831/* fbcmap.c */
832extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
833extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
834extern void fb_dealloc_cmap(struct fb_cmap *cmap);
835extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
836extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
837extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
838extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
839extern const struct fb_cmap *fb_default_cmap(int len);
840extern void fb_invert_cmaps(void);
841
842struct fb_videomode {
843 const char *name; /* optional */
844 u32 refresh; /* optional */
845 u32 xres;
846 u32 yres;
847 u32 pixclock;
848 u32 left_margin;
849 u32 right_margin;
850 u32 upper_margin;
851 u32 lower_margin;
852 u32 hsync_len;
853 u32 vsync_len;
854 u32 sync;
855 u32 vmode;
856 u32 flag;
857};
858
859struct dmt_videomode {
860 u32 dmt_id;
861 u32 std_2byte_code;
862 u32 cvt_3byte_code;
863 const struct fb_videomode *mode;
864};
865
866extern const struct fb_videomode vesa_modes[];
867extern const struct dmt_videomode dmt_modes[];
868
869struct fb_modelist {
870 struct list_head list;
871 struct fb_videomode mode;
872};
873
874extern int fb_find_mode(struct fb_var_screeninfo *var,
875 struct fb_info *info, const char *mode_option,
876 const struct fb_videomode *db,
877 unsigned int dbsize,
878 const struct fb_videomode *default_mode,
879 unsigned int default_bpp);
880
881bool fb_modesetting_disabled(const char *drvname);
882
883/*
884 * Convenience logging macros
885 */
886
887#define fb_err(fb_info, fmt, ...) \
888 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
889#define fb_notice(info, fmt, ...) \
890 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
891#define fb_warn(fb_info, fmt, ...) \
892 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
893#define fb_info(fb_info, fmt, ...) \
894 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
895#define fb_dbg(fb_info, fmt, ...) \
896 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
897
898#define fb_warn_once(fb_info, fmt, ...) \
899 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
900
901#define fb_WARN_ONCE(fb_info, condition, fmt, ...) \
902 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
903#define fb_WARN_ON_ONCE(fb_info, x) \
904 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")")
905
906#endif /* _LINUX_FB_H */