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Merge tag 'perf-tools-for-v6.4-3-2023-05-06' of git://git.kernel.org/pub/scm/linux...
[linux-block.git] / include / linux / fb.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 2#ifndef _LINUX_FB_H
3#define _LINUX_FB_H
4
0189cb57 5#include <linux/refcount.h>
d219adc1 6#include <linux/kgdb.h>
607ca46e 7#include <uapi/linux/fb.h>
1da177e4 8
1da177e4 9#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)
1da177e4
LT		 10
11#include <linux/fs.h>
12#include <linux/init.h>
1da177e4 13#include <linux/workqueue.h>
1da177e4
LT		 14#include <linux/notifier.h>
15#include <linux/list.h>
2b257425 16#include <linux/backlight.h>
1471ca9a 17#include <linux/slab.h>
1da177e4
LT		 18#include <asm/io.h>
19
20struct vm_area_struct;
21struct fb_info;
22struct device;
23struct file;
2db54c72 24struct videomode;
79089044 25struct device_node;
1da177e4
LT		 26
27/* Definitions below are used in the parsed monitor specs */
28#define FB_DPMS_ACTIVE_OFF 1
29#define FB_DPMS_SUSPEND 2
30#define FB_DPMS_STANDBY 4
31
32#define FB_DISP_DDI 1
33#define FB_DISP_ANA_700_300 2
34#define FB_DISP_ANA_714_286 4
35#define FB_DISP_ANA_1000_400 8
36#define FB_DISP_ANA_700_000 16
37
38#define FB_DISP_MONO 32
39#define FB_DISP_RGB 64
40#define FB_DISP_MULTI 128
41#define FB_DISP_UNKNOWN 256
42
43#define FB_SIGNAL_NONE 0
44#define FB_SIGNAL_BLANK_BLANK 1
45#define FB_SIGNAL_SEPARATE 2
46#define FB_SIGNAL_COMPOSITE 4
47#define FB_SIGNAL_SYNC_ON_GREEN 8
48#define FB_SIGNAL_SERRATION_ON 16
49
50#define FB_MISC_PRIM_COLOR 1
51#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */
e6853aaf 52#define FB_MISC_HDMI 4
1da177e4
LT		 53struct fb_chroma {
54 __u32 redx; /* in fraction of 1024 */
55 __u32 greenx;
56 __u32 bluex;
57 __u32 whitex;
58 __u32 redy;
59 __u32 greeny;
60 __u32 bluey;
61 __u32 whitey;
62};
63
64struct fb_monspecs {
65 struct fb_chroma chroma;
66 struct fb_videomode *modedb; /* mode database */
67 __u8 manufacturer[4]; /* Manufacturer */
68 __u8 monitor[14]; /* Monitor String */
69 __u8 serial_no[14]; /* Serial Number */
70 __u8 ascii[14]; /* ? */
71 __u32 modedb_len; /* mode database length */
72 __u32 model; /* Monitor Model */
73 __u32 serial; /* Serial Number - Integer */
74 __u32 year; /* Year manufactured */
75 __u32 week; /* Week Manufactured */
76 __u32 hfmin; /* hfreq lower limit (Hz) */
77 __u32 hfmax; /* hfreq upper limit (Hz) */
78 __u32 dclkmin; /* pixelclock lower limit (Hz) */
79 __u32 dclkmax; /* pixelclock upper limit (Hz) */
80 __u16 input; /* display type - see FB_DISP_* */
81 __u16 dpms; /* DPMS support - see FB_DPMS_ */
82 __u16 signal; /* Signal Type - see FB_SIGNAL_* */
83 __u16 vfmin; /* vfreq lower limit (Hz) */
84 __u16 vfmax; /* vfreq upper limit (Hz) */
85 __u16 gamma; /* Gamma - in fractions of 100 */
86 __u16 gtf : 1; /* supports GTF */
87 __u16 misc; /* Misc flags - see FB_MISC_* */
88 __u8 version; /* EDID version... */
89 __u8 revision; /* ...and revision */
90 __u8 max_x; /* Maximum horizontal size (cm) */
91 __u8 max_y; /* Maximum vertical size (cm) */
92};
93
94struct fb_cmap_user {
95 __u32 start; /* First entry */
96 __u32 len; /* Number of entries */
97 __u16 __user *red; /* Red values */
98 __u16 __user *green;
99 __u16 __user *blue;
100 __u16 __user *transp; /* transparency, can be NULL */
101};
102
103struct fb_image_user {
104 __u32 dx; /* Where to place image */
105 __u32 dy;
106 __u32 width; /* Size of image */
107 __u32 height;
108 __u32 fg_color; /* Only used when a mono bitmap */
109 __u32 bg_color;
110 __u8 depth; /* Depth of the image */
111 const char __user *data; /* Pointer to image data */
112 struct fb_cmap_user cmap; /* color map info */
113};
114
115struct fb_cursor_user {
116 __u16 set; /* what to set */
117 __u16 enable; /* cursor on/off */
118 __u16 rop; /* bitop operation */
119 const char __user *mask; /* cursor mask bits */
120 struct fbcurpos hot; /* cursor hot spot */
121 struct fb_image_user image; /* Cursor image */
122};
123
124/*
125 * Register/unregister for framebuffer events
126 */
127
2d05f56a 128/* The resolution of the passed in fb_info about to change */
1da177e4 129#define FB_EVENT_MODE_CHANGE 0x01
97b67986
DV		 130
131#ifdef CONFIG_GUMSTIX_AM200EPD
132/* only used by mach-pxa/am200epd.c */
1da177e4 133#define FB_EVENT_FB_REGISTERED 0x05
e614b18d 134#define FB_EVENT_FB_UNREGISTERED 0x06
97b67986
DV		 135#endif
136
7a625549 137/* A display blank is requested */
e614b18d 138#define FB_EVENT_BLANK 0x09
1da177e4
LT		 139
140struct fb_event {
141 struct fb_info *info;
142 void *data;
143};
144
38a3dc51
AD		 145struct fb_blit_caps {
146 u32 x;
147 u32 y;
148 u32 len;
149 u32 flags;
150};
1da177e4 151
5ec96538 152#ifdef CONFIG_FB_NOTIFY
1da177e4
LT		 153extern int fb_register_client(struct notifier_block *nb);
154extern int fb_unregister_client(struct notifier_block *nb);
256154fb 155extern int fb_notifier_call_chain(unsigned long val, void *v);
5ec96538
EG		 156#else
157static inline int fb_register_client(struct notifier_block *nb)
158{
159 return 0;
160};
161
162static inline int fb_unregister_client(struct notifier_block *nb)
163{
164 return 0;
165};
166
167static inline int fb_notifier_call_chain(unsigned long val, void *v)
168{
169 return 0;
170};
171#endif
172
1da177e4
LT		 173/*
174 * Pixmap structure definition
175 *
176 * The purpose of this structure is to translate data
177 * from the hardware independent format of fbdev to what
178 * format the hardware needs.
179 */
180
181#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */
182#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */
183#define FB_PIXMAP_IO 4 /* memory is iomapped */
184#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */
185
186struct fb_pixmap {
187 u8 *addr; /* pointer to memory */
188 u32 size; /* size of buffer in bytes */
189 u32 offset; /* current offset to buffer */
190 u32 buf_align; /* byte alignment of each bitmap */
191 u32 scan_align; /* alignment per scanline */
f5a9951c 192 u32 access_align; /* alignment per read/write (bits) */
1da177e4 193 u32 flags; /* see FB_PIXMAP_* */
bf26ad72
AD		 194 u32 blit_x; /* supported bit block dimensions (1-32)*/
195 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
196 /* blit_y = 1 << (height - 1) */
197 /* if 0, will be set to 0xffffffff (all)*/
1da177e4 198 /* access methods */
f5a9951c
JS		 199 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
200 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
1da177e4
LT		 201};
202
60b59bea 203#ifdef CONFIG_FB_DEFERRED_IO
56c134f7
TZ		 204struct fb_deferred_io_pageref {
205 struct page *page;
206 unsigned long offset;
207 /* private */
208 struct list_head list;
209};
210
60b59bea
JK		 211struct fb_deferred_io {
212 /* delay between mkwrite and deferred handler */
213 unsigned long delay;
e80eec1b 214 bool sort_pagereflist; /* sort pagelist by offset */
fe9ae05c 215 int open_count; /* number of opened files; protected by fb_info lock */
e80eec1b
TZ		 216 struct mutex lock; /* mutex that protects the pageref list */
217 struct list_head pagereflist; /* list of pagerefs for touched pages */
60b59bea
JK		 218 /* callback */
219 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
220};
221#endif
1da177e4
LT		 222
223/*
224 * Frame buffer operations
225 *
226 * LOCKING NOTE: those functions must _ALL_ be called with the console
b3c2ffd5 227 * semaphore held, this is the only suitable locking mechanism we have
1da177e4 228 * in 2.6. Some may be called at interrupt time at this point though.
d219adc1
JB		 229 *
230 * The exception to this is the debug related hooks. Putting the fb
231 * into a debug state (e.g. flipping to the kernel console) and restoring
232 * it must be done in a lock-free manner, so low level drivers should
233 * keep track of the initial console (if applicable) and may need to
234 * perform direct, unlocked hardware writes in these hooks.
1da177e4
LT		 235 */
236
237struct fb_ops {
238 /* open/release and usage marking */
239 struct module *owner;
240 int (*fb_open)(struct fb_info *info, int user);
241 int (*fb_release)(struct fb_info *info, int user);
242
243 /* For framebuffers with strange non linear layouts or that do not
244 * work with normal memory mapped access
245 */
3f9b0880
AD		 246 ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
247 size_t count, loff_t *ppos);
248 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
249 size_t count, loff_t *ppos);
1da177e4
LT		 250
251 /* checks var and eventually tweaks it to something supported,
252 * DO NOT MODIFY PAR */
253 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
254
255 /* set the video mode according to info->var */
256 int (*fb_set_par)(struct fb_info *info);
257
258 /* set color register */
259 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
260 unsigned blue, unsigned transp, struct fb_info *info);
261
71494376
BH		 262 /* set color registers in batch */
263 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
264
1da177e4
LT		 265 /* blank display */
266 int (*fb_blank)(int blank, struct fb_info *info);
267
268 /* pan display */
269 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
270
271 /* Draws a rectangle */
272 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
1148836f 273 /* Copy data from area to another */
1da177e4
LT		 274 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
275 /* Draws a image to the display */
276 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
277
278 /* Draws cursor */
279 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
280
1da177e4
LT		 281 /* wait for blit idle, optional */
282 int (*fb_sync)(struct fb_info *info);
283
284 /* perform fb specific ioctl (optional) */
67a6680d
CH		 285 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
286 unsigned long arg);
1da177e4
LT		 287
288 /* Handle 32bit compat ioctl (optional) */
67a6680d
CH		 289 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
290 unsigned long arg);
1da177e4
LT		 291
292 /* perform fb specific mmap */
216d526c 293 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
47434847 294
38a3dc51
AD		 295 /* get capability given var */
296 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
297 struct fb_var_screeninfo *var);
4410f391
DA		 298
299 /* teardown any resources to do with this framebuffer */
300 void (*fb_destroy)(struct fb_info *info);
d219adc1
JB		 301
302 /* called at KDB enter and leave time to prepare the console */
303 int (*fb_debug_enter)(struct fb_info *info);
304 int (*fb_debug_leave)(struct fb_info *info);
1da177e4
LT		 305};
306
307#ifdef CONFIG_FB_TILEBLITTING
1da177e4
LT		 308#define FB_TILE_CURSOR_NONE 0
309#define FB_TILE_CURSOR_UNDERLINE 1
310#define FB_TILE_CURSOR_LOWER_THIRD 2
311#define FB_TILE_CURSOR_LOWER_HALF 3
312#define FB_TILE_CURSOR_TWO_THIRDS 4
313#define FB_TILE_CURSOR_BLOCK 5
314
315struct fb_tilemap {
316 __u32 width; /* width of each tile in pixels */
317 __u32 height; /* height of each tile in scanlines */
318 __u32 depth; /* color depth of each tile */
319 __u32 length; /* number of tiles in the map */
2f4516db 320 const __u8 *data; /* actual tile map: a bitmap array, packed
1da177e4
LT		 321 to the nearest byte */
322};
323
324struct fb_tilerect {
325 __u32 sx; /* origin in the x-axis */
326 __u32 sy; /* origin in the y-axis */
327 __u32 width; /* number of tiles in the x-axis */
328 __u32 height; /* number of tiles in the y-axis */
329 __u32 index; /* what tile to use: index to tile map */
330 __u32 fg; /* foreground color */
331 __u32 bg; /* background color */
332 __u32 rop; /* raster operation */
333};
334
335struct fb_tilearea {
336 __u32 sx; /* source origin in the x-axis */
337 __u32 sy; /* source origin in the y-axis */
338 __u32 dx; /* destination origin in the x-axis */
339 __u32 dy; /* destination origin in the y-axis */
340 __u32 width; /* number of tiles in the x-axis */
341 __u32 height; /* number of tiles in the y-axis */
342};
343
344struct fb_tileblit {
345 __u32 sx; /* origin in the x-axis */
346 __u32 sy; /* origin in the y-axis */
347 __u32 width; /* number of tiles in the x-axis */
348 __u32 height; /* number of tiles in the y-axis */
349 __u32 fg; /* foreground color */
350 __u32 bg; /* background color */
351 __u32 length; /* number of tiles to draw */
352 __u32 *indices; /* array of indices to tile map */
353};
354
355struct fb_tilecursor {
356 __u32 sx; /* cursor position in the x-axis */
357 __u32 sy; /* cursor position in the y-axis */
358 __u32 mode; /* 0 = erase, 1 = draw */
359 __u32 shape; /* see FB_TILE_CURSOR_* */
360 __u32 fg; /* foreground color */
361 __u32 bg; /* background color */
362};
363
364struct fb_tile_ops {
365 /* set tile characteristics */
366 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
367
368 /* all dimensions from hereon are in terms of tiles */
369
370 /* move a rectangular region of tiles from one area to another*/
371 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
372 /* fill a rectangular region with a tile */
373 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
374 /* copy an array of tiles */
375 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
376 /* cursor */
377 void (*fb_tilecursor)(struct fb_info *info,
378 struct fb_tilecursor *cursor);
11f11d52
AD		 379 /* get maximum length of the tile map */
380 int (*fb_get_tilemax)(struct fb_info *info);
1da177e4
LT		 381};
382#endif /* CONFIG_FB_TILEBLITTING */
383
384/* FBINFO_* = fb_info.flags bit flags */
376b3ff5 385#define FBINFO_DEFAULT 0
1da177e4
LT		 386#define FBINFO_HWACCEL_DISABLED 0x0002
387 /* When FBINFO_HWACCEL_DISABLED is set:
388 * Hardware acceleration is turned off. Software implementations
389 * of required functions (copyarea(), fillrect(), and imageblit())
390 * takes over; acceleration engine should be in a quiescent state */
391
392/* hints */
7164bb43 393#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */
1da177e4
LT		 394#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
395#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */
396
397/* hardware supported ops */
398/* semantics: when a bit is set, it indicates that the operation is
399 * accelerated by hardware.
400 * required functions will still work even if the bit is not set.
401 * optional functions may not even exist if the flag bit is not set.
402 */
403#define FBINFO_HWACCEL_NONE 0x0000
404#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */
405#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */
406#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */
407#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */
408#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */
409#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */
410#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */
411
1da177e4
LT		 412#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */
413
39942fd8
KP		 414/* A driver may set this flag to indicate that it does want a set_par to be
415 * called every time when fbcon_switch is executed. The advantage is that with
7f927fcc 416 * this flag set you can really be sure that set_par is always called before
25985edc 417 * any of the functions dependent on the correct hardware state or altering
39942fd8
KP		 418 * that state, even if you are using some broken X releases. The disadvantage
419 * is that it introduces unwanted delays to every console switch if set_par
420 * is slow. It is a good idea to try this flag in the drivers initialization
421 * code whenever there is a bug report related to switching between X and the
422 * framebuffer console.
423 */
424#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
425
e4c690e0
AV		 426/*
427 * Host and GPU endianness differ.
428 */
429#define FBINFO_FOREIGN_ENDIAN 0x100000
430/*
431 * Big endian math. This is the same flags as above, but with different
432 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
433 * and host endianness. Drivers should not use this flag.
434 */
435#define FBINFO_BE_MATH 0x100000
da6c7707
DV		 436/*
437 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
438 * drivers to stop userspace from trying to share buffers behind the kernel's
439 * back. Instead dma-buf based buffer sharing should be used.
440 */
441#define FBINFO_HIDE_SMEM_START 0x200000
442
e4c690e0 443
1da177e4 444struct fb_info {
0189cb57 445 refcount_t count;
1da177e4
LT		 446 int node;
447 int flags;
c9e6a364
HG		 448 /*
449 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
450 * a lcd is not mounted upright and fbcon should rotate to compensate.
451 */
452 int fbcon_rotate_hint;
3e680aae 453 struct mutex lock; /* Lock for open/release/ioctl funcs */
537a1bf0 454 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
1da177e4
LT		 455 struct fb_var_screeninfo var; /* Current var */
456 struct fb_fix_screeninfo fix; /* Current fix */
457 struct fb_monspecs monspecs; /* Current Monitor specs */
1da177e4
LT		 458 struct fb_pixmap pixmap; /* Image hardware mapper */
459 struct fb_pixmap sprite; /* Cursor hardware mapper */
460 struct fb_cmap cmap; /* Current cmap */
461 struct list_head modelist; /* mode list */
462 struct fb_videomode *mode; /* current mode */
5474c120 463
b4a1ed0c 464#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
5474c120 465 /* assigned backlight device */
2d05f56a 466 /* set before framebuffer registration,
37ce69a5 467 remove after unregister */
5474c120
MH		 468 struct backlight_device *bl_dev;
469
470 /* Backlight level curve */
2d05f56a 471 struct mutex bl_curve_mutex;
5474c120
MH		 472 u8 bl_curve[FB_BACKLIGHT_LEVELS];
473#endif
60b59bea
JK		 474#ifdef CONFIG_FB_DEFERRED_IO
475 struct delayed_work deferred_work;
56c134f7
TZ		 476 unsigned long npagerefs;
477 struct fb_deferred_io_pageref *pagerefs;
60b59bea
JK		 478 struct fb_deferred_io *fbdefio;
479#endif
5474c120 480
bf9e25ec 481 const struct fb_ops *fbops;
78cde088
GKH		 482 struct device *device; /* This is the parent */
483 struct device *dev; /* This is this fb device */
1a6600be 484 int class_flag; /* private sysfs flags */
1da177e4
LT		 485#ifdef CONFIG_FB_TILEBLITTING
486 struct fb_tile_ops *tileops; /* Tile Blitting */
487#endif
17a7b0b4
LS		 488 union {
489 char __iomem *screen_base; /* Virtual address */
490 char *screen_buffer;
491 };
2d05f56a
TZ		 492 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
493 void *pseudo_palette; /* Fake palette of 16 colors */
1da177e4
LT		 494#define FBINFO_STATE_RUNNING 0
495#define FBINFO_STATE_SUSPENDED 1
496 u32 state; /* Hardware state i.e suspend */
497 void *fbcon_par; /* fbcon use-only private area */
498 /* From here on everything is device dependent */
4410f391 499 void *par;
3cf2667b
JB		 500
501 bool skip_vt_switch; /* no VT switch on suspend/resume required */
1da177e4
LT		 502};
503
1da177e4
LT		 504#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
505
506/* This will go away
507 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
508 * when it wants to turn the acceleration engine on. This is
509 * really a separate operation, and should be modified via sysfs.
510 * But for now, we leave it broken with the following define
511 */
512#define STUPID_ACCELF_TEXT_SHIT
513
514// This will go away
515#if defined(__sparc__)
516
517/* We map all of our framebuffers such that big-endian accesses
518 * are what we want, so the following is sufficient.
519 */
520
521// This will go away
522#define fb_readb sbus_readb
523#define fb_readw sbus_readw
524#define fb_readl sbus_readl
525#define fb_readq sbus_readq
526#define fb_writeb sbus_writeb
527#define fb_writew sbus_writew
528#define fb_writel sbus_writel
529#define fb_writeq sbus_writeq
530#define fb_memset sbus_memset_io
f11b478d
JH		 531#define fb_memcpy_fromfb sbus_memcpy_fromio
532#define fb_memcpy_tofb sbus_memcpy_toio
1da177e4 533
f1b95b71
JZ		 534#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
535 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
25b72d53 536 defined(__arm__) || defined(__aarch64__) || defined(__mips__)
1da177e4
LT		 537
538#define fb_readb __raw_readb
539#define fb_readw __raw_readw
540#define fb_readl __raw_readl
541#define fb_readq __raw_readq
542#define fb_writeb __raw_writeb
543#define fb_writew __raw_writew
544#define fb_writel __raw_writel
545#define fb_writeq __raw_writeq
546#define fb_memset memset_io
f11b478d
JH		 547#define fb_memcpy_fromfb memcpy_fromio
548#define fb_memcpy_tofb memcpy_toio
1da177e4
LT		 549
550#else
551
552#define fb_readb(addr) (*(volatile u8 *) (addr))
553#define fb_readw(addr) (*(volatile u16 *) (addr))
554#define fb_readl(addr) (*(volatile u32 *) (addr))
555#define fb_readq(addr) (*(volatile u64 *) (addr))
556#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
557#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
558#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
559#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
560#define fb_memset memset
f11b478d
JH		 561#define fb_memcpy_fromfb memcpy
562#define fb_memcpy_tofb memcpy
1da177e4 563
be0d9b6c
AD		 564#endif
565
e4c690e0
AV		 566#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
567#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
568 (val) << (bits))
569#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
570 (val) >> (bits))
1da177e4
LT		 571
572 /*
573 * `Generic' versions of the frame buffer device operations
574 */
575
2d05f56a
TZ		 576extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
577extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
1da177e4 578extern int fb_blank(struct fb_info *info, int blank);
2d05f56a
TZ		 579extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
580extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
1da177e4 581extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
68648ed1
AD		 582/*
583 * Drawing operations where framebuffer is in system RAM
584 */
585extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
586extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
587extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
09aaf268
AD		 588extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
589 size_t count, loff_t *ppos);
590extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
591 size_t count, loff_t *ppos);
1da177e4
LT		 592
593/* drivers/video/fbmem.c */
594extern int register_framebuffer(struct fb_info *fb_info);
deb00d27 595extern void unregister_framebuffer(struct fb_info *fb_info);
9c44e5f6
AD		 596extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
597extern int fb_show_logo(struct fb_info *fb_info, int rotate);
1da177e4 598extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
f1ab5dac 599extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
1da177e4 600 u32 height, u32 shift_high, u32 shift_low, u32 mod);
f1ab5dac 601extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
1da177e4 602extern void fb_set_suspend(struct fb_info *info, int state);
b8c90945
AD		 603extern int fb_get_color_depth(struct fb_var_screeninfo *var,
604 struct fb_fix_screeninfo *fix);
a66e62ae 605extern int fb_get_options(const char *name, char **option);
1da177e4
LT		 606extern int fb_new_modelist(struct fb_info *info);
607
890d14d2 608extern bool fb_center_logo;
691f50ab 609extern int fb_logo_count;
9db71a18 610extern struct class *fb_class;
1da177e4 611
cf4a3ae4
DV		 612static inline void lock_fb_info(struct fb_info *info)
613{
614 mutex_lock(&info->lock);
615}
1f5e31d7
AR		 616
617static inline void unlock_fb_info(struct fb_info *info)
618{
619 mutex_unlock(&info->lock);
620}
621
829e79b6
AD		 622static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
623 u8 *src, u32 s_pitch, u32 height)
624{
ee346873 625 u32 i, j;
829e79b6
AD		 626
627 d_pitch -= s_pitch;
628
629 for (i = height; i--; ) {
630 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
631 for (j = 0; j < s_pitch; j++)
632 *dst++ = *src++;
633 dst += d_pitch;
634 }
635}
636
60b59bea 637/* drivers/video/fb_defio.c */
ba026334 638int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
56c134f7 639extern int fb_deferred_io_init(struct fb_info *info);
0b78f8bc
MW		 640extern void fb_deferred_io_open(struct fb_info *info,
641 struct inode *inode,
642 struct file *file);
3efc61d9 643extern void fb_deferred_io_release(struct fb_info *info);
60b59bea 644extern void fb_deferred_io_cleanup(struct fb_info *info);
02c24a82
JB		 645extern int fb_deferred_io_fsync(struct file *file, loff_t start,
646 loff_t end, int datasync);
60b59bea 647
e4c690e0
AV		 648static inline bool fb_be_math(struct fb_info *info)
649{
650#ifdef CONFIG_FB_FOREIGN_ENDIAN
651#if defined(CONFIG_FB_BOTH_ENDIAN)
652 return info->flags & FBINFO_BE_MATH;
653#elif defined(CONFIG_FB_BIG_ENDIAN)
654 return true;
655#elif defined(CONFIG_FB_LITTLE_ENDIAN)
656 return false;
657#endif /* CONFIG_FB_BOTH_ENDIAN */
658#else
659#ifdef __BIG_ENDIAN
660 return true;
661#else
662 return false;
663#endif /* __BIG_ENDIAN */
664#endif /* CONFIG_FB_FOREIGN_ENDIAN */
665}
666
1da177e4
LT		 667/* drivers/video/fbsysfs.c */
668extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
669extern void framebuffer_release(struct fb_info *info);
78cde088
GKH		 670extern int fb_init_device(struct fb_info *fb_info);
671extern void fb_cleanup_device(struct fb_info *head);
5474c120 672extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
1da177e4
LT		 673
674/* drivers/video/fbmon.c */
675#define FB_MAXTIMINGS 0
676#define FB_VSYNCTIMINGS 1
677#define FB_HSYNCTIMINGS 2
678#define FB_DCLKTIMINGS 3
679#define FB_IGNOREMON 0x100
680
681#define FB_MODE_IS_UNKNOWN 0
682#define FB_MODE_IS_DETAILED 1
683#define FB_MODE_IS_STANDARD 2
684#define FB_MODE_IS_VESA 4
685#define FB_MODE_IS_CALCULATED 8
686#define FB_MODE_IS_FIRST 16
687#define FB_MODE_IS_FROM_VAR 32
688
1da177e4
LT		 689extern int fbmon_dpms(const struct fb_info *fb_info);
690extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
691 struct fb_info *info);
692extern int fb_validate_mode(const struct fb_var_screeninfo *var,
693 struct fb_info *info);
694extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
5e518d76
AD		 695extern const unsigned char *fb_firmware_edid(struct device *device);
696extern void fb_edid_to_monspecs(unsigned char *edid,
697 struct fb_monspecs *specs);
1da177e4 698extern void fb_destroy_modedb(struct fb_videomode *modedb);
96fe6a21 699extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
fc5891c8 700extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
1da177e4 701
79089044
ST		 702extern int of_get_fb_videomode(struct device_node *np,
703 struct fb_videomode *fb,
704 int index);
2db54c72
ST		 705extern int fb_videomode_from_videomode(const struct videomode *vm,
706 struct fb_videomode *fbmode);
707
1da177e4 708/* drivers/video/modedb.c */
37715f55 709#define VESA_MODEDB_SIZE 43
8f5ee77b
DU		 710#define DMT_SIZE 0x50
711
1da177e4 712extern void fb_var_to_videomode(struct fb_videomode *mode,
9791d763 713 const struct fb_var_screeninfo *var);
1da177e4 714extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
9791d763
GU		 715 const struct fb_videomode *mode);
716extern int fb_mode_is_equal(const struct fb_videomode *mode1,
717 const struct fb_videomode *mode2);
718extern int fb_add_videomode(const struct fb_videomode *mode,
719 struct list_head *head);
720extern void fb_delete_videomode(const struct fb_videomode *mode,
1da177e4 721 struct list_head *head);
9791d763
GU		 722extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
723 struct list_head *head);
724extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
725 struct list_head *head);
726extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
727 struct list_head *head);
1da177e4 728extern void fb_destroy_modelist(struct list_head *head);
9791d763 729extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1da177e4 730 struct list_head *head);
9791d763
GU		 731extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
732 struct list_head *head);
1da177e4
LT		 733
734/* drivers/video/fbcmap.c */
735extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
1e7c7804 736extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
1da177e4 737extern void fb_dealloc_cmap(struct fb_cmap *cmap);
adf6b206
HD		 738extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
739extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
1da177e4
LT		 740extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
741extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
adf6b206 742extern const struct fb_cmap *fb_default_cmap(int len);
1da177e4
LT		 743extern void fb_invert_cmaps(void);
744
745struct fb_videomode {
746 const char *name; /* optional */
747 u32 refresh; /* optional */
748 u32 xres;
749 u32 yres;
750 u32 pixclock;
751 u32 left_margin;
752 u32 right_margin;
753 u32 upper_margin;
754 u32 lower_margin;
755 u32 hsync_len;
756 u32 vsync_len;
757 u32 sync;
758 u32 vmode;
759 u32 flag;
760};
761
8f5ee77b
DU		 762struct dmt_videomode {
763 u32 dmt_id;
764 u32 std_2byte_code;
765 u32 cvt_3byte_code;
766 const struct fb_videomode *mode;
767};
768
1da177e4 769extern const struct fb_videomode vesa_modes[];
8f5ee77b 770extern const struct dmt_videomode dmt_modes[];
1da177e4
LT		 771
772struct fb_modelist {
773 struct list_head list;
774 struct fb_videomode mode;
775};
776
777extern int fb_find_mode(struct fb_var_screeninfo *var,
778 struct fb_info *info, const char *mode_option,
779 const struct fb_videomode *db,
780 unsigned int dbsize,
781 const struct fb_videomode *default_mode,
782 unsigned int default_bpp);
783
0ba2fa8c
TZ		 784#if defined(CONFIG_VIDEO_NOMODESET)
785bool fb_modesetting_disabled(const char *drvname);
786#else
0c0860d1 787static inline bool fb_modesetting_disabled(const char *drvname)
0ba2fa8c
TZ		 788{
789 return false;
790}
791#endif
792
f51a07d0
JP		 793/* Convenience logging macros */
794#define fb_err(fb_info, fmt, ...) \
795 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
796#define fb_notice(info, fmt, ...) \
797 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
798#define fb_warn(fb_info, fmt, ...) \
799 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
800#define fb_info(fb_info, fmt, ...) \
801 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
802#define fb_dbg(fb_info, fmt, ...) \
803 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
804
1da177e4 805#endif /* _LINUX_FB_H */
Linux 6.x block layer and io_uring tree(s)