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/fb.h> 16 17struct backlight_device; 18struct device; 19struct device_node; 20struct fb_info; 21struct file; 22struct i2c_adapter; 23struct inode; 24struct module; 25struct notifier_block; 26struct page; 27struct videomode; 28struct vm_area_struct; 29 30/* Definitions below are used in the parsed monitor specs */ 31#define FB_DPMS_ACTIVE_OFF 1 32#define FB_DPMS_SUSPEND 2 33#define FB_DPMS_STANDBY 4 34 35#define FB_DISP_DDI 1 36#define FB_DISP_ANA_700_300 2 37#define FB_DISP_ANA_714_286 4 38#define FB_DISP_ANA_1000_400 8 39#define FB_DISP_ANA_700_000 16 40 41#define FB_DISP_MONO 32 42#define FB_DISP_RGB 64 43#define FB_DISP_MULTI 128 44#define FB_DISP_UNKNOWN 256 45 46#define FB_SIGNAL_NONE 0 47#define FB_SIGNAL_BLANK_BLANK 1 48#define FB_SIGNAL_SEPARATE 2 49#define FB_SIGNAL_COMPOSITE 4 50#define FB_SIGNAL_SYNC_ON_GREEN 8 51#define FB_SIGNAL_SERRATION_ON 16 52 53#define FB_MISC_PRIM_COLOR 1 54#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */ 55#define FB_MISC_HDMI 4 56struct fb_chroma { 57 __u32 redx; /* in fraction of 1024 */ 58 __u32 greenx; 59 __u32 bluex; 60 __u32 whitex; 61 __u32 redy; 62 __u32 greeny; 63 __u32 bluey; 64 __u32 whitey; 65}; 66 67struct fb_monspecs { 68 struct fb_chroma chroma; 69 struct fb_videomode *modedb; /* mode database */ 70 __u8 manufacturer[4]; /* Manufacturer */ 71 __u8 monitor[14]; /* Monitor String */ 72 __u8 serial_no[14]; /* Serial Number */ 73 __u8 ascii[14]; /* ? */ 74 __u32 modedb_len; /* mode database length */ 75 __u32 model; /* Monitor Model */ 76 __u32 serial; /* Serial Number - Integer */ 77 __u32 year; /* Year manufactured */ 78 __u32 week; /* Week Manufactured */ 79 __u32 hfmin; /* hfreq lower limit (Hz) */ 80 __u32 hfmax; /* hfreq upper limit (Hz) */ 81 __u32 dclkmin; /* pixelclock lower limit (Hz) */ 82 __u32 dclkmax; /* pixelclock upper limit (Hz) */ 83 __u16 input; /* display type - see FB_DISP_* */ 84 __u16 dpms; /* DPMS support - see FB_DPMS_ */ 85 __u16 signal; /* Signal Type - see FB_SIGNAL_* */ 86 __u16 vfmin; /* vfreq lower limit (Hz) */ 87 __u16 vfmax; /* vfreq upper limit (Hz) */ 88 __u16 gamma; /* Gamma - in fractions of 100 */ 89 __u16 gtf : 1; /* supports GTF */ 90 __u16 misc; /* Misc flags - see FB_MISC_* */ 91 __u8 version; /* EDID version... */ 92 __u8 revision; /* ...and revision */ 93 __u8 max_x; /* Maximum horizontal size (cm) */ 94 __u8 max_y; /* Maximum vertical size (cm) */ 95}; 96 97struct fb_cmap_user { 98 __u32 start; /* First entry */ 99 __u32 len; /* Number of entries */ 100 __u16 __user *red; /* Red values */ 101 __u16 __user *green; 102 __u16 __user *blue; 103 __u16 __user *transp; /* transparency, can be NULL */ 104}; 105 106struct fb_image_user { 107 __u32 dx; /* Where to place image */ 108 __u32 dy; 109 __u32 width; /* Size of image */ 110 __u32 height; 111 __u32 fg_color; /* Only used when a mono bitmap */ 112 __u32 bg_color; 113 __u8 depth; /* Depth of the image */ 114 const char __user *data; /* Pointer to image data */ 115 struct fb_cmap_user cmap; /* color map info */ 116}; 117 118struct fb_cursor_user { 119 __u16 set; /* what to set */ 120 __u16 enable; /* cursor on/off */ 121 __u16 rop; /* bitop operation */ 122 const char __user *mask; /* cursor mask bits */ 123 struct fbcurpos hot; /* cursor hot spot */ 124 struct fb_image_user image; /* Cursor image */ 125}; 126 127/* 128 * Register/unregister for framebuffer events 129 */ 130 131/* The resolution of the passed in fb_info about to change */ 132#define FB_EVENT_MODE_CHANGE 0x01 133 134#ifdef CONFIG_GUMSTIX_AM200EPD 135/* only used by mach-pxa/am200epd.c */ 136#define FB_EVENT_FB_REGISTERED 0x05 137#define FB_EVENT_FB_UNREGISTERED 0x06 138#endif 139 140/* A display blank is requested */ 141#define FB_EVENT_BLANK 0x09 142 143struct fb_event { 144 struct fb_info *info; 145 void *data; 146}; 147 148/* Enough for the VT console needs, see its max_font_width/height */ 149#define FB_MAX_BLIT_WIDTH 64 150#define FB_MAX_BLIT_HEIGHT 128 151 152struct fb_blit_caps { 153 DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH); 154 DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT); 155 u32 len; 156 u32 flags; 157}; 158 159#ifdef CONFIG_FB_NOTIFY 160extern int fb_register_client(struct notifier_block *nb); 161extern int fb_unregister_client(struct notifier_block *nb); 162extern int fb_notifier_call_chain(unsigned long val, void *v); 163#else 164static inline int fb_register_client(struct notifier_block *nb) 165{ 166 return 0; 167}; 168 169static inline int fb_unregister_client(struct notifier_block *nb) 170{ 171 return 0; 172}; 173 174static inline int fb_notifier_call_chain(unsigned long val, void *v) 175{ 176 return 0; 177}; 178#endif 179 180/* 181 * Pixmap structure definition 182 * 183 * The purpose of this structure is to translate data 184 * from the hardware independent format of fbdev to what 185 * format the hardware needs. 186 */ 187 188#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ 189#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ 190#define FB_PIXMAP_IO 4 /* memory is iomapped */ 191#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ 192 193struct fb_pixmap { 194 u8 *addr; /* pointer to memory */ 195 u32 size; /* size of buffer in bytes */ 196 u32 offset; /* current offset to buffer */ 197 u32 buf_align; /* byte alignment of each bitmap */ 198 u32 scan_align; /* alignment per scanline */ 199 u32 access_align; /* alignment per read/write (bits) */ 200 u32 flags; /* see FB_PIXMAP_* */ 201 /* supported bit block dimensions */ 202 /* Format: test_bit(width - 1, blit_x) */ 203 /* test_bit(height - 1, blit_y) */ 204 /* if zero, will be set to full (all) */ 205 DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH); 206 DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT); 207 /* access methods */ 208 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); 209 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); 210}; 211 212#ifdef CONFIG_FB_DEFERRED_IO 213struct fb_deferred_io_pageref { 214 struct page *page; 215 unsigned long offset; 216 /* private */ 217 struct list_head list; 218}; 219 220struct fb_deferred_io { 221 /* delay between mkwrite and deferred handler */ 222 unsigned long delay; 223 bool sort_pagereflist; /* sort pagelist by offset */ 224 int open_count; /* number of opened files; protected by fb_info lock */ 225 struct mutex lock; /* mutex that protects the pageref list */ 226 struct list_head pagereflist; /* list of pagerefs for touched pages */ 227 /* callback */ 228 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); 229}; 230#endif 231 232/* 233 * Frame buffer operations 234 * 235 * LOCKING NOTE: those functions must _ALL_ be called with the console 236 * semaphore held, this is the only suitable locking mechanism we have 237 * in 2.6. Some may be called at interrupt time at this point though. 238 * 239 * The exception to this is the debug related hooks. Putting the fb 240 * into a debug state (e.g. flipping to the kernel console) and restoring 241 * it must be done in a lock-free manner, so low level drivers should 242 * keep track of the initial console (if applicable) and may need to 243 * perform direct, unlocked hardware writes in these hooks. 244 */ 245 246struct fb_ops { 247 /* open/release and usage marking */ 248 struct module *owner; 249 int (*fb_open)(struct fb_info *info, int user); 250 int (*fb_release)(struct fb_info *info, int user); 251 252 /* For framebuffers with strange non linear layouts or that do not 253 * work with normal memory mapped access 254 */ 255 ssize_t (*fb_read)(struct fb_info *info, char __user *buf, 256 size_t count, loff_t *ppos); 257 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, 258 size_t count, loff_t *ppos); 259 260 /* checks var and eventually tweaks it to something supported, 261 * DO NOT MODIFY PAR */ 262 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); 263 264 /* set the video mode according to info->var */ 265 int (*fb_set_par)(struct fb_info *info); 266 267 /* set color register */ 268 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, 269 unsigned blue, unsigned transp, struct fb_info *info); 270 271 /* set color registers in batch */ 272 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); 273 274 /* blank display */ 275 int (*fb_blank)(int blank, struct fb_info *info); 276 277 /* pan display */ 278 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); 279 280 /* Draws a rectangle */ 281 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); 282 /* Copy data from area to another */ 283 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); 284 /* Draws a image to the display */ 285 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); 286 287 /* Draws cursor */ 288 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); 289 290 /* wait for blit idle, optional */ 291 int (*fb_sync)(struct fb_info *info); 292 293 /* perform fb specific ioctl (optional) */ 294 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, 295 unsigned long arg); 296 297 /* Handle 32bit compat ioctl (optional) */ 298 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, 299 unsigned long arg); 300 301 /* perform fb specific mmap */ 302 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); 303 304 /* get capability given var */ 305 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, 306 struct fb_var_screeninfo *var); 307 308 /* teardown any resources to do with this framebuffer */ 309 void (*fb_destroy)(struct fb_info *info); 310 311 /* called at KDB enter and leave time to prepare the console */ 312 int (*fb_debug_enter)(struct fb_info *info); 313 int (*fb_debug_leave)(struct fb_info *info); 314}; 315 316#ifdef CONFIG_FB_TILEBLITTING 317#define FB_TILE_CURSOR_NONE 0 318#define FB_TILE_CURSOR_UNDERLINE 1 319#define FB_TILE_CURSOR_LOWER_THIRD 2 320#define FB_TILE_CURSOR_LOWER_HALF 3 321#define FB_TILE_CURSOR_TWO_THIRDS 4 322#define FB_TILE_CURSOR_BLOCK 5 323 324struct fb_tilemap { 325 __u32 width; /* width of each tile in pixels */ 326 __u32 height; /* height of each tile in scanlines */ 327 __u32 depth; /* color depth of each tile */ 328 __u32 length; /* number of tiles in the map */ 329 const __u8 *data; /* actual tile map: a bitmap array, packed 330 to the nearest byte */ 331}; 332 333struct fb_tilerect { 334 __u32 sx; /* origin in the x-axis */ 335 __u32 sy; /* origin in the y-axis */ 336 __u32 width; /* number of tiles in the x-axis */ 337 __u32 height; /* number of tiles in the y-axis */ 338 __u32 index; /* what tile to use: index to tile map */ 339 __u32 fg; /* foreground color */ 340 __u32 bg; /* background color */ 341 __u32 rop; /* raster operation */ 342}; 343 344struct fb_tilearea { 345 __u32 sx; /* source origin in the x-axis */ 346 __u32 sy; /* source origin in the y-axis */ 347 __u32 dx; /* destination origin in the x-axis */ 348 __u32 dy; /* destination origin in the y-axis */ 349 __u32 width; /* number of tiles in the x-axis */ 350 __u32 height; /* number of tiles in the y-axis */ 351}; 352 353struct fb_tileblit { 354 __u32 sx; /* origin in the x-axis */ 355 __u32 sy; /* origin in the y-axis */ 356 __u32 width; /* number of tiles in the x-axis */ 357 __u32 height; /* number of tiles in the y-axis */ 358 __u32 fg; /* foreground color */ 359 __u32 bg; /* background color */ 360 __u32 length; /* number of tiles to draw */ 361 __u32 *indices; /* array of indices to tile map */ 362}; 363 364struct fb_tilecursor { 365 __u32 sx; /* cursor position in the x-axis */ 366 __u32 sy; /* cursor position in the y-axis */ 367 __u32 mode; /* 0 = erase, 1 = draw */ 368 __u32 shape; /* see FB_TILE_CURSOR_* */ 369 __u32 fg; /* foreground color */ 370 __u32 bg; /* background color */ 371}; 372 373struct fb_tile_ops { 374 /* set tile characteristics */ 375 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); 376 377 /* all dimensions from hereon are in terms of tiles */ 378 379 /* move a rectangular region of tiles from one area to another*/ 380 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); 381 /* fill a rectangular region with a tile */ 382 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); 383 /* copy an array of tiles */ 384 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); 385 /* cursor */ 386 void (*fb_tilecursor)(struct fb_info *info, 387 struct fb_tilecursor *cursor); 388 /* get maximum length of the tile map */ 389 int (*fb_get_tilemax)(struct fb_info *info); 390}; 391#endif /* CONFIG_FB_TILEBLITTING */ 392 393/* FBINFO_* = fb_info.flags bit flags */ 394#define FBINFO_HWACCEL_DISABLED 0x0002 395 /* When FBINFO_HWACCEL_DISABLED is set: 396 * Hardware acceleration is turned off. Software implementations 397 * of required functions (copyarea(), fillrect(), and imageblit()) 398 * takes over; acceleration engine should be in a quiescent state */ 399 400/* hints */ 401#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ 402#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ 403#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ 404 405/* hardware supported ops */ 406/* semantics: when a bit is set, it indicates that the operation is 407 * accelerated by hardware. 408 * required functions will still work even if the bit is not set. 409 * optional functions may not even exist if the flag bit is not set. 410 */ 411#define FBINFO_HWACCEL_NONE 0x0000 412#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ 413#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ 414#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ 415#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ 416#define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ 417#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ 418#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ 419 420#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ 421 422/* A driver may set this flag to indicate that it does want a set_par to be 423 * called every time when fbcon_switch is executed. The advantage is that with 424 * this flag set you can really be sure that set_par is always called before 425 * any of the functions dependent on the correct hardware state or altering 426 * that state, even if you are using some broken X releases. The disadvantage 427 * is that it introduces unwanted delays to every console switch if set_par 428 * is slow. It is a good idea to try this flag in the drivers initialization 429 * code whenever there is a bug report related to switching between X and the 430 * framebuffer console. 431 */ 432#define FBINFO_MISC_ALWAYS_SETPAR 0x40000 433 434/* 435 * Host and GPU endianness differ. 436 */ 437#define FBINFO_FOREIGN_ENDIAN 0x100000 438/* 439 * Big endian math. This is the same flags as above, but with different 440 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag 441 * and host endianness. Drivers should not use this flag. 442 */ 443#define FBINFO_BE_MATH 0x100000 444/* 445 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM 446 * drivers to stop userspace from trying to share buffers behind the kernel's 447 * back. Instead dma-buf based buffer sharing should be used. 448 */ 449#define FBINFO_HIDE_SMEM_START 0x200000 450 451 452struct fb_info { 453 refcount_t count; 454 int node; 455 int flags; 456 /* 457 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows 458 * a lcd is not mounted upright and fbcon should rotate to compensate. 459 */ 460 int fbcon_rotate_hint; 461 struct mutex lock; /* Lock for open/release/ioctl funcs */ 462 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */ 463 struct fb_var_screeninfo var; /* Current var */ 464 struct fb_fix_screeninfo fix; /* Current fix */ 465 struct fb_monspecs monspecs; /* Current Monitor specs */ 466 struct fb_pixmap pixmap; /* Image hardware mapper */ 467 struct fb_pixmap sprite; /* Cursor hardware mapper */ 468 struct fb_cmap cmap; /* Current cmap */ 469 struct list_head modelist; /* mode list */ 470 struct fb_videomode *mode; /* current mode */ 471 472#if IS_ENABLED(CONFIG_FB_BACKLIGHT) 473 /* assigned backlight device */ 474 /* set before framebuffer registration, 475 remove after unregister */ 476 struct backlight_device *bl_dev; 477 478 /* Backlight level curve */ 479 struct mutex bl_curve_mutex; 480 u8 bl_curve[FB_BACKLIGHT_LEVELS]; 481#endif 482#ifdef CONFIG_FB_DEFERRED_IO 483 struct delayed_work deferred_work; 484 unsigned long npagerefs; 485 struct fb_deferred_io_pageref *pagerefs; 486 struct fb_deferred_io *fbdefio; 487#endif 488 489 const struct fb_ops *fbops; 490 struct device *device; /* This is the parent */ 491#if defined(CONFIG_FB_DEVICE) 492 struct device *dev; /* This is this fb device */ 493#endif 494 int class_flag; /* private sysfs flags */ 495#ifdef CONFIG_FB_TILEBLITTING 496 struct fb_tile_ops *tileops; /* Tile Blitting */ 497#endif 498 union { 499 char __iomem *screen_base; /* Virtual address */ 500 char *screen_buffer; 501 }; 502 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 503 void *pseudo_palette; /* Fake palette of 16 colors */ 504#define FBINFO_STATE_RUNNING 0 505#define FBINFO_STATE_SUSPENDED 1 506 u32 state; /* Hardware state i.e suspend */ 507 void *fbcon_par; /* fbcon use-only private area */ 508 /* From here on everything is device dependent */ 509 void *par; 510 511 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 512}; 513 514/* This will go away 515 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 516 * when it wants to turn the acceleration engine on. This is 517 * really a separate operation, and should be modified via sysfs. 518 * But for now, we leave it broken with the following define 519 */ 520#define STUPID_ACCELF_TEXT_SHIT 521 522#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 523#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 524 (val) << (bits)) 525#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 526 (val) >> (bits)) 527 528 /* 529 * `Generic' versions of the frame buffer device operations 530 */ 531 532extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 533extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 534extern int fb_blank(struct fb_info *info, int blank); 535 536/* 537 * Helpers for framebuffers in I/O memory 538 */ 539 540extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 541extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 542extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 543extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, 544 size_t count, loff_t *ppos); 545extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, 546 size_t count, loff_t *ppos); 547int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 548 549#define __FB_DEFAULT_IOMEM_OPS_RDWR \ 550 .fb_read = fb_io_read, \ 551 .fb_write = fb_io_write 552 553#define __FB_DEFAULT_IOMEM_OPS_DRAW \ 554 .fb_fillrect = cfb_fillrect, \ 555 .fb_copyarea = cfb_copyarea, \ 556 .fb_imageblit = cfb_imageblit 557 558#define __FB_DEFAULT_IOMEM_OPS_MMAP \ 559 .fb_mmap = fb_io_mmap 560 561#define FB_DEFAULT_IOMEM_OPS \ 562 __FB_DEFAULT_IOMEM_OPS_RDWR, \ 563 __FB_DEFAULT_IOMEM_OPS_DRAW, \ 564 __FB_DEFAULT_IOMEM_OPS_MMAP 565 566/* 567 * Helpers for framebuffers in system memory 568 */ 569 570extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 571extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 572extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 573extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 574 size_t count, loff_t *ppos); 575extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 576 size_t count, loff_t *ppos); 577 578#define __FB_DEFAULT_SYSMEM_OPS_RDWR \ 579 .fb_read = fb_sys_read, \ 580 .fb_write = fb_sys_write 581 582#define __FB_DEFAULT_SYSMEM_OPS_DRAW \ 583 .fb_fillrect = sys_fillrect, \ 584 .fb_copyarea = sys_copyarea, \ 585 .fb_imageblit = sys_imageblit 586 587/* 588 * Helpers for framebuffers in DMA-able memory 589 */ 590 591#define __FB_DEFAULT_DMAMEM_OPS_RDWR \ 592 .fb_read = fb_sys_read, \ 593 .fb_write = fb_sys_write 594 595#define __FB_DEFAULT_DMAMEM_OPS_DRAW \ 596 .fb_fillrect = sys_fillrect, \ 597 .fb_copyarea = sys_copyarea, \ 598 .fb_imageblit = sys_imageblit 599 600/* fbmem.c */ 601extern int register_framebuffer(struct fb_info *fb_info); 602extern void unregister_framebuffer(struct fb_info *fb_info); 603extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 604extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 605 u32 height, u32 shift_high, u32 shift_low, u32 mod); 606extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 607extern void fb_set_suspend(struct fb_info *info, int state); 608extern int fb_get_color_depth(struct fb_var_screeninfo *var, 609 struct fb_fix_screeninfo *fix); 610extern int fb_get_options(const char *name, char **option); 611extern int fb_new_modelist(struct fb_info *info); 612 613static inline void lock_fb_info(struct fb_info *info) 614{ 615 mutex_lock(&info->lock); 616} 617 618static inline void unlock_fb_info(struct fb_info *info) 619{ 620 mutex_unlock(&info->lock); 621} 622 623static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 624 u8 *src, u32 s_pitch, u32 height) 625{ 626 u32 i, j; 627 628 d_pitch -= s_pitch; 629 630 for (i = height; i--; ) { 631 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 632 for (j = 0; j < s_pitch; j++) 633 *dst++ = *src++; 634 dst += d_pitch; 635 } 636} 637 638/* fb_defio.c */ 639int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 640extern int fb_deferred_io_init(struct fb_info *info); 641extern void fb_deferred_io_open(struct fb_info *info, 642 struct inode *inode, 643 struct file *file); 644extern void fb_deferred_io_release(struct fb_info *info); 645extern void fb_deferred_io_cleanup(struct fb_info *info); 646extern int fb_deferred_io_fsync(struct file *file, loff_t start, 647 loff_t end, int datasync); 648 649/* 650 * Generate callbacks for deferred I/O 651 */ 652 653#define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \ 654 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \ 655 size_t count, loff_t *ppos) \ 656 { \ 657 return fb_ ## __mode ## _read(info, buf, count, ppos); \ 658 } \ 659 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \ 660 size_t count, loff_t *ppos) \ 661 { \ 662 unsigned long offset = *ppos; \ 663 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \ 664 if (ret > 0) \ 665 __damage_range(info, offset, ret); \ 666 return ret; \ 667 } 668 669#define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \ 670 static void __prefix ## _defio_fillrect(struct fb_info *info, \ 671 const struct fb_fillrect *rect) \ 672 { \ 673 __mode ## _fillrect(info, rect); \ 674 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \ 675 } \ 676 static void __prefix ## _defio_copyarea(struct fb_info *info, \ 677 const struct fb_copyarea *area) \ 678 { \ 679 __mode ## _copyarea(info, area); \ 680 __damage_area(info, area->dx, area->dy, area->width, area->height); \ 681 } \ 682 static void __prefix ## _defio_imageblit(struct fb_info *info, \ 683 const struct fb_image *image) \ 684 { \ 685 __mode ## _imageblit(info, image); \ 686 __damage_area(info, image->dx, image->dy, image->width, image->height); \ 687 } 688 689#define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \ 690 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \ 691 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb) 692 693#define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \ 694 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 695 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 696 697/* 698 * Initializes struct fb_ops for deferred I/O. 699 */ 700 701#define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \ 702 .fb_read = __prefix ## _defio_read, \ 703 .fb_write = __prefix ## _defio_write 704 705#define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \ 706 .fb_fillrect = __prefix ## _defio_fillrect, \ 707 .fb_copyarea = __prefix ## _defio_copyarea, \ 708 .fb_imageblit = __prefix ## _defio_imageblit 709 710#define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \ 711 .fb_mmap = fb_deferred_io_mmap 712 713#define FB_DEFAULT_DEFERRED_OPS(__prefix) \ 714 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \ 715 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \ 716 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) 717 718static inline bool fb_be_math(struct fb_info *info) 719{ 720#ifdef CONFIG_FB_FOREIGN_ENDIAN 721#if defined(CONFIG_FB_BOTH_ENDIAN) 722 return info->flags & FBINFO_BE_MATH; 723#elif defined(CONFIG_FB_BIG_ENDIAN) 724 return true; 725#elif defined(CONFIG_FB_LITTLE_ENDIAN) 726 return false; 727#endif /* CONFIG_FB_BOTH_ENDIAN */ 728#else 729#ifdef __BIG_ENDIAN 730 return true; 731#else 732 return false; 733#endif /* __BIG_ENDIAN */ 734#endif /* CONFIG_FB_FOREIGN_ENDIAN */ 735} 736 737extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 738extern void framebuffer_release(struct fb_info *info); 739extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 740 741/* fbmon.c */ 742#define FB_MAXTIMINGS 0 743#define FB_VSYNCTIMINGS 1 744#define FB_HSYNCTIMINGS 2 745#define FB_DCLKTIMINGS 3 746#define FB_IGNOREMON 0x100 747 748#define FB_MODE_IS_UNKNOWN 0 749#define FB_MODE_IS_DETAILED 1 750#define FB_MODE_IS_STANDARD 2 751#define FB_MODE_IS_VESA 4 752#define FB_MODE_IS_CALCULATED 8 753#define FB_MODE_IS_FIRST 16 754#define FB_MODE_IS_FROM_VAR 32 755 756extern int fbmon_dpms(const struct fb_info *fb_info); 757extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 758 struct fb_info *info); 759extern int fb_validate_mode(const struct fb_var_screeninfo *var, 760 struct fb_info *info); 761extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 762extern const unsigned char *fb_firmware_edid(struct device *device); 763extern void fb_edid_to_monspecs(unsigned char *edid, 764 struct fb_monspecs *specs); 765extern void fb_destroy_modedb(struct fb_videomode *modedb); 766extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 767extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 768 769extern int of_get_fb_videomode(struct device_node *np, 770 struct fb_videomode *fb, 771 int index); 772extern int fb_videomode_from_videomode(const struct videomode *vm, 773 struct fb_videomode *fbmode); 774 775/* modedb.c */ 776#define VESA_MODEDB_SIZE 43 777#define DMT_SIZE 0x50 778 779extern void fb_var_to_videomode(struct fb_videomode *mode, 780 const struct fb_var_screeninfo *var); 781extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 782 const struct fb_videomode *mode); 783extern int fb_mode_is_equal(const struct fb_videomode *mode1, 784 const struct fb_videomode *mode2); 785extern int fb_add_videomode(const struct fb_videomode *mode, 786 struct list_head *head); 787extern void fb_delete_videomode(const struct fb_videomode *mode, 788 struct list_head *head); 789extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 790 struct list_head *head); 791extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 792 struct list_head *head); 793extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 794 struct list_head *head); 795extern void fb_destroy_modelist(struct list_head *head); 796extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 797 struct list_head *head); 798extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 799 struct list_head *head); 800 801/* fbcmap.c */ 802extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 803extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 804extern void fb_dealloc_cmap(struct fb_cmap *cmap); 805extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 806extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 807extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 808extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 809extern const struct fb_cmap *fb_default_cmap(int len); 810extern void fb_invert_cmaps(void); 811 812struct fb_videomode { 813 const char *name; /* optional */ 814 u32 refresh; /* optional */ 815 u32 xres; 816 u32 yres; 817 u32 pixclock; 818 u32 left_margin; 819 u32 right_margin; 820 u32 upper_margin; 821 u32 lower_margin; 822 u32 hsync_len; 823 u32 vsync_len; 824 u32 sync; 825 u32 vmode; 826 u32 flag; 827}; 828 829struct dmt_videomode { 830 u32 dmt_id; 831 u32 std_2byte_code; 832 u32 cvt_3byte_code; 833 const struct fb_videomode *mode; 834}; 835 836extern const struct fb_videomode vesa_modes[]; 837extern const struct dmt_videomode dmt_modes[]; 838 839struct fb_modelist { 840 struct list_head list; 841 struct fb_videomode mode; 842}; 843 844extern int fb_find_mode(struct fb_var_screeninfo *var, 845 struct fb_info *info, const char *mode_option, 846 const struct fb_videomode *db, 847 unsigned int dbsize, 848 const struct fb_videomode *default_mode, 849 unsigned int default_bpp); 850 851bool fb_modesetting_disabled(const char *drvname); 852 853/* 854 * Convenience logging macros 855 */ 856 857#define fb_err(fb_info, fmt, ...) \ 858 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 859#define fb_notice(info, fmt, ...) \ 860 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 861#define fb_warn(fb_info, fmt, ...) \ 862 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 863#define fb_info(fb_info, fmt, ...) \ 864 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 865#define fb_dbg(fb_info, fmt, ...) \ 866 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 867 868#define fb_warn_once(fb_info, fmt, ...) \ 869 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 870 871#define fb_WARN_ONCE(fb_info, condition, fmt, ...) \ 872 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 873#define fb_WARN_ON_ONCE(fb_info, x) \ 874 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")") 875 876#endif /* _LINUX_FB_H */ 877