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fb.h
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linux-6.19.14/include/linux/fb.h
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#ifdef CONFIG_FB_TILEBLITTING 501 struct fb_tile_ops *tileops; /* Tile Blitting */ 502#endif 503 union { 504 char __iomem *screen_base; /* Virtual address */ 505 char *screen_buffer; 506 }; 507 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 508 void *pseudo_palette; /* Fake palette of 16 colors */ 509#define FBINFO_STATE_RUNNING 0 510#define FBINFO_STATE_SUSPENDED 1 511 u32 state; /* Hardware state i.e suspend */ 512 void *fbcon_par; /* fbcon use-only private area */ 513 /* From here on everything is device dependent */ 514 void *par; 515 516 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 517 bool skip_panic; /* Do not write to the fb after a panic */ 518}; 519 520/* This will go away 521 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 522 * when it wants to turn the acceleration engine on. This is 523 * really a separate operation, and should be modified via sysfs. 524 * But for now, we leave it broken with the following define 525 */ 526#define STUPID_ACCELF_TEXT_SHIT 527 528#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 529#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 530 (val) << (bits)) 531#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 532 (val) >> (bits)) 533 534 /* 535 * `Generic' versions of the frame buffer device operations 536 */ 537 538extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 539extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 540extern int fb_blank(struct fb_info *info, int blank); 541 542/* 543 * Helpers for framebuffers in I/O memory 544 */ 545 546extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 547extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 548extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 549extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, 550 size_t count, loff_t *ppos); 551extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, 552 size_t count, loff_t *ppos); 553int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 554 555#define __FB_DEFAULT_IOMEM_OPS_RDWR \ 556 .fb_read = fb_io_read, \ 557 .fb_write = fb_io_write 558 559#define __FB_DEFAULT_IOMEM_OPS_DRAW \ 560 .fb_fillrect = cfb_fillrect, \ 561 .fb_copyarea = cfb_copyarea, \ 562 .fb_imageblit = cfb_imageblit 563 564#define __FB_DEFAULT_IOMEM_OPS_MMAP \ 565 .fb_mmap = fb_io_mmap 566 567#define FB_DEFAULT_IOMEM_OPS \ 568 __FB_DEFAULT_IOMEM_OPS_RDWR, \ 569 __FB_DEFAULT_IOMEM_OPS_DRAW, \ 570 __FB_DEFAULT_IOMEM_OPS_MMAP 571 572/* 573 * Helpers for framebuffers in system memory 574 */ 575 576extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 577extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 578extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 579extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 580 size_t count, loff_t *ppos); 581extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 582 size_t count, loff_t *ppos); 583 584#define __FB_DEFAULT_SYSMEM_OPS_RDWR \ 585 .fb_read = fb_sys_read, \ 586 .fb_write = fb_sys_write 587 588#define __FB_DEFAULT_SYSMEM_OPS_DRAW \ 589 .fb_fillrect = sys_fillrect, \ 590 .fb_copyarea = sys_copyarea, \ 591 .fb_imageblit = sys_imageblit 592 593/* 594 * Helpers for framebuffers in DMA-able memory 595 */ 596 597#define __FB_DEFAULT_DMAMEM_OPS_RDWR \ 598 .fb_read = fb_sys_read, \ 599 .fb_write = fb_sys_write 600 601#define __FB_DEFAULT_DMAMEM_OPS_DRAW \ 602 .fb_fillrect = sys_fillrect, \ 603 .fb_copyarea = sys_copyarea, \ 604 .fb_imageblit = sys_imageblit 605 606/* fbmem.c */ 607extern int register_framebuffer(struct fb_info *fb_info); 608extern void unregister_framebuffer(struct fb_info *fb_info); 609extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info); 610extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 611extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 612 u32 height, u32 shift_high, u32 shift_low, u32 mod); 613extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 614extern void fb_set_suspend(struct fb_info *info, int state); 615extern int fb_get_color_depth(struct fb_var_screeninfo *var, 616 struct fb_fix_screeninfo *fix); 617extern int fb_get_options(const char *name, char **option); 618extern int fb_new_modelist(struct fb_info *info); 619 620static inline void lock_fb_info(struct fb_info *info) 621{ 622 mutex_lock(&info->lock); 623} 624 625static inline void unlock_fb_info(struct fb_info *info) 626{ 627 mutex_unlock(&info->lock); 628} 629 630static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 631 u8 *src, u32 s_pitch, u32 height) 632{ 633 u32 i, j; 634 635 d_pitch -= s_pitch; 636 637 for (i = height; i--; ) { 638 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 639 for (j = 0; j < s_pitch; j++) 640 *dst++ = *src++; 641 dst += d_pitch; 642 } 643} 644 645/* fb_defio.c */ 646int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 647extern int fb_deferred_io_init(struct fb_info *info); 648extern void fb_deferred_io_open(struct fb_info *info, 649 struct inode *inode, 650 struct file *file); 651extern void fb_deferred_io_release(struct fb_info *info); 652extern void fb_deferred_io_cleanup(struct fb_info *info); 653extern int fb_deferred_io_fsync(struct file *file, loff_t start, 654 loff_t end, int datasync); 655 656/* 657 * Generate callbacks for deferred I/O 658 */ 659 660#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \ 661 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \ 662 size_t count, loff_t *ppos) \ 663 { \ 664 return fb_ ## __mode ## _read(info, buf, count, ppos); \ 665 } \ 666 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \ 667 size_t count, loff_t *ppos) \ 668 { \ 669 unsigned long offset = *ppos; \ 670 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \ 671 if (ret > 0) \ 672 __damage_range(info, offset, ret); \ 673 return ret; \ 674 } 675 676#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \ 677 static void __prefix ## _defio_fillrect(struct fb_info *info, \ 678 const struct fb_fillrect *rect) \ 679 { \ 680 __mode ## _fillrect(info, rect); \ 681 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \ 682 } \ 683 static void __prefix ## _defio_copyarea(struct fb_info *info, \ 684 const struct fb_copyarea *area) \ 685 { \ 686 __mode ## _copyarea(info, area); \ 687 __damage_area(info, area->dx, area->dy, area->width, area->height); \ 688 } \ 689 static void __prefix ## _defio_imageblit(struct fb_info *info, \ 690 const struct fb_image *image) \ 691 { \ 692 __mode ## _imageblit(info, image); \ 693 __damage_area(info, image->dx, image->dy, image->width, image->height); \ 694 } 695 696#define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \ 697 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \ 698 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb) 699 700#define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \ 701 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 702 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 703 704#define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \ 705 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 706 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 707 708/* 709 * Initializes struct fb_ops for deferred I/O. 710 */ 711 712#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \ 713 .fb_read = __prefix ## _defio_read, \ 714 .fb_write = __prefix ## _defio_write 715 716#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \ 717 .fb_fillrect = __prefix ## _defio_fillrect, \ 718 .fb_copyarea = __prefix ## _defio_copyarea, \ 719 .fb_imageblit = __prefix ## _defio_imageblit 720 721#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \ 722 .fb_mmap = fb_deferred_io_mmap 723 724#define FB_DEFAULT_DEFERRED_OPS(__prefix) \ 725 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \ 726 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \ 727 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) 728 729static inline bool fb_be_math(struct fb_info *info) 730{ 731#ifdef CONFIG_FB_FOREIGN_ENDIAN 732#if defined(CONFIG_FB_BOTH_ENDIAN) 733 return info->flags & FBINFO_BE_MATH; 734#elif defined(CONFIG_FB_BIG_ENDIAN) 735 return true; 736#elif defined(CONFIG_FB_LITTLE_ENDIAN) 737 return false; 738#endif /* CONFIG_FB_BOTH_ENDIAN */ 739#else 740#ifdef __BIG_ENDIAN 741 return true; 742#else 743 return false; 744#endif /* __BIG_ENDIAN */ 745#endif /* CONFIG_FB_FOREIGN_ENDIAN */ 746} 747 748extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 749extern void framebuffer_release(struct fb_info *info); 750extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 751 752#if IS_ENABLED(CONFIG_FB_BACKLIGHT) 753struct backlight_device *fb_bl_device(struct fb_info *info); 754void fb_bl_notify_blank(struct fb_info *info, int old_blank); 755#else 756static inline struct backlight_device *fb_bl_device(struct fb_info *info) 757{ 758 return NULL; 759} 760 761static inline void fb_bl_notify_blank(struct fb_info *info, int old_blank) 762{ } 763#endif 764 765static inline struct lcd_device *fb_lcd_device(struct fb_info *info) 766{ 767 return info->lcd_dev; 768} 769 770/* fbmon.c */ 771#define FB_MAXTIMINGS 0 772#define FB_VSYNCTIMINGS 1 773#define FB_HSYNCTIMINGS 2 774#define FB_DCLKTIMINGS 3 775#define FB_IGNOREMON 0x100 776 777#define FB_MODE_IS_UNKNOWN 0 778#define FB_MODE_IS_DETAILED 1 779#define FB_MODE_IS_STANDARD 2 780#define FB_MODE_IS_VESA 4 781#define FB_MODE_IS_CALCULATED 8 782#define FB_MODE_IS_FIRST 16 783#define FB_MODE_IS_FROM_VAR 32 784 785extern int fbmon_dpms(const struct fb_info *fb_info); 786extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 787 struct fb_info *info); 788extern int fb_validate_mode(const struct fb_var_screeninfo *var, 789 struct fb_info *info); 790extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 791extern const unsigned char *fb_firmware_edid(struct device *device); 792extern void fb_edid_to_monspecs(unsigned char *edid, 793 struct fb_monspecs *specs); 794extern void fb_destroy_modedb(struct fb_videomode *modedb); 795extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 796extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 797 798extern int of_get_fb_videomode(struct device_node *np, 799 struct fb_videomode *fb, 800 int index); 801extern int fb_videomode_from_videomode(const struct videomode *vm, 802 struct fb_videomode *fbmode); 803 804/* modedb.c */ 805#define VESA_MODEDB_SIZE 43 806#define DMT_SIZE 0x50 807 808extern void fb_var_to_videomode(struct fb_videomode *mode, 809 const struct fb_var_screeninfo *var); 810extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 811 const struct fb_videomode *mode); 812extern int fb_mode_is_equal(const struct fb_videomode *mode1, 813 const struct fb_videomode *mode2); 814extern int fb_add_videomode(const struct fb_videomode *mode, 815 struct list_head *head); 816extern void fb_delete_videomode(const struct fb_videomode *mode, 817 struct list_head *head); 818extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 819 struct list_head *head); 820extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 821 struct list_head *head); 822extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 823 struct list_head *head); 824extern void fb_destroy_modelist(struct list_head *head); 825extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 826 struct list_head *head); 827extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 828 struct list_head *head); 829 830/* fbcmap.c */ 831extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 832extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 833extern void fb_dealloc_cmap(struct fb_cmap *cmap); 834extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 835extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 836extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 837extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 838extern const struct fb_cmap *fb_default_cmap(int len); 839extern void fb_invert_cmaps(void); 840 841struct fb_videomode { 842 const char *name; /* optional */ 843 u32 refresh; /* optional */ 844 u32 xres; 845 u32 yres; 846 u32 pixclock; 847 u32 left_margin; 848 u32 right_margin; 849 u32 upper_margin; 850 u32 lower_margin; 851 u32 hsync_len; 852 u32 vsync_len; 853 u32 sync; 854 u32 vmode; 855 u32 flag; 856}; 857 858struct dmt_videomode { 859 u32 dmt_id; 860 u32 std_2byte_code; 861 u32 cvt_3byte_code; 862 const struct fb_videomode *mode; 863}; 864 865extern const struct fb_videomode vesa_modes[]; 866extern const struct dmt_videomode dmt_modes[]; 867 868struct fb_modelist { 869 struct list_head list; 870 struct fb_videomode mode; 871}; 872 873extern int fb_find_mode(struct fb_var_screeninfo *var, 874 struct fb_info *info, const char *mode_option, 875 const struct fb_videomode *db, 876 unsigned int dbsize, 877 const struct fb_videomode *default_mode, 878 unsigned int default_bpp); 879 880bool fb_modesetting_disabled(const char *drvname); 881 882/* 883 * Convenience logging macros 884 */ 885 886#define fb_err(fb_info, fmt, ...) \ 887 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 888#define fb_notice(info, fmt, ...) \ 889 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 890#define fb_warn(fb_info, fmt, ...) \ 891 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 892#define fb_info(fb_info, fmt, ...) \ 893 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 894#define fb_dbg(fb_info, fmt, ...) \ 895 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 896 897#define fb_warn_once(fb_info, fmt, ...) \ 898 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 899 900#define fb_WARN_ONCE(fb_info, condition, fmt, ...) \ 901 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 902#define fb_WARN_ON_ONCE(fb_info, x) \ 903 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")") 904 905#endif /* _LINUX_FB_H */
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