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