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