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 #include <asm/io.h> 19 20 struct vm_area_struct; 21 struct fb_info; 22 struct device; 23 struct file; 24 struct videomode; 25 struct device_node; 26 27 /* Definitions below are used in the parsed monitor specs */ 28 #define FB_DPMS_ACTIVE_OFF 1 29 #define FB_DPMS_SUSPEND 2 30 #define FB_DPMS_STANDBY 4 31 32 #define FB_DISP_DDI 1 33 #define FB_DISP_ANA_700_300 2 34 #define FB_DISP_ANA_714_286 4 35 #define FB_DISP_ANA_1000_400 8 36 #define FB_DISP_ANA_700_000 16 37 38 #define FB_DISP_MONO 32 39 #define FB_DISP_RGB 64 40 #define FB_DISP_MULTI 128 41 #define FB_DISP_UNKNOWN 256 42 43 #define FB_SIGNAL_NONE 0 44 #define FB_SIGNAL_BLANK_BLANK 1 45 #define FB_SIGNAL_SEPARATE 2 46 #define FB_SIGNAL_COMPOSITE 4 47 #define FB_SIGNAL_SYNC_ON_GREEN 8 48 #define FB_SIGNAL_SERRATION_ON 16 49 50 #define FB_MISC_PRIM_COLOR 1 51 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */ 52 #define FB_MISC_HDMI 4 53 struct fb_chroma { 54 __u32 redx; /* in fraction of 1024 */ 55 __u32 greenx; 56 __u32 bluex; 57 __u32 whitex; 58 __u32 redy; 59 __u32 greeny; 60 __u32 bluey; 61 __u32 whitey; 62 }; 63 64 struct fb_monspecs { 65 struct fb_chroma chroma; 66 struct fb_videomode *modedb; /* mode database */ 67 __u8 manufacturer[4]; /* Manufacturer */ 68 __u8 monitor[14]; /* Monitor String */ 69 __u8 serial_no[14]; /* Serial Number */ 70 __u8 ascii[14]; /* ? */ 71 __u32 modedb_len; /* mode database length */ 72 __u32 model; /* Monitor Model */ 73 __u32 serial; /* Serial Number - Integer */ 74 __u32 year; /* Year manufactured */ 75 __u32 week; /* Week Manufactured */ 76 __u32 hfmin; /* hfreq lower limit (Hz) */ 77 __u32 hfmax; /* hfreq upper limit (Hz) */ 78 __u32 dclkmin; /* pixelclock lower limit (Hz) */ 79 __u32 dclkmax; /* pixelclock upper limit (Hz) */ 80 __u16 input; /* display type - see FB_DISP_* */ 81 __u16 dpms; /* DPMS support - see FB_DPMS_ */ 82 __u16 signal; /* Signal Type - see FB_SIGNAL_* */ 83 __u16 vfmin; /* vfreq lower limit (Hz) */ 84 __u16 vfmax; /* vfreq upper limit (Hz) */ 85 __u16 gamma; /* Gamma - in fractions of 100 */ 86 __u16 gtf : 1; /* supports GTF */ 87 __u16 misc; /* Misc flags - see FB_MISC_* */ 88 __u8 version; /* EDID version... */ 89 __u8 revision; /* ...and revision */ 90 __u8 max_x; /* Maximum horizontal size (cm) */ 91 __u8 max_y; /* Maximum vertical size (cm) */ 92 }; 93 94 struct fb_cmap_user { 95 __u32 start; /* First entry */ 96 __u32 len; /* Number of entries */ 97 __u16 __user *red; /* Red values */ 98 __u16 __user *green; 99 __u16 __user *blue; 100 __u16 __user *transp; /* transparency, can be NULL */ 101 }; 102 103 struct fb_image_user { 104 __u32 dx; /* Where to place image */ 105 __u32 dy; 106 __u32 width; /* Size of image */ 107 __u32 height; 108 __u32 fg_color; /* Only used when a mono bitmap */ 109 __u32 bg_color; 110 __u8 depth; /* Depth of the image */ 111 const char __user *data; /* Pointer to image data */ 112 struct fb_cmap_user cmap; /* color map info */ 113 }; 114 115 struct fb_cursor_user { 116 __u16 set; /* what to set */ 117 __u16 enable; /* cursor on/off */ 118 __u16 rop; /* bitop operation */ 119 const char __user *mask; /* cursor mask bits */ 120 struct fbcurpos hot; /* cursor hot spot */ 121 struct fb_image_user image; /* Cursor image */ 122 }; 123 124 /* 125 * Register/unregister for framebuffer events 126 */ 127 128 /* The resolution of the passed in fb_info about to change */ 129 #define FB_EVENT_MODE_CHANGE 0x01 130 131 #ifdef CONFIG_GUMSTIX_AM200EPD 132 /* only used by mach-pxa/am200epd.c */ 133 #define FB_EVENT_FB_REGISTERED 0x05 134 #define FB_EVENT_FB_UNREGISTERED 0x06 135 #endif 136 137 /* A display blank is requested */ 138 #define FB_EVENT_BLANK 0x09 139 140 struct fb_event { 141 struct fb_info *info; 142 void *data; 143 }; 144 145 struct fb_blit_caps { 146 u32 x; 147 u32 y; 148 u32 len; 149 u32 flags; 150 }; 151 152 #ifdef CONFIG_FB_NOTIFY 153 extern int fb_register_client(struct notifier_block *nb); 154 extern int fb_unregister_client(struct notifier_block *nb); 155 extern int fb_notifier_call_chain(unsigned long val, void *v); 156 #else 157 static inline int fb_register_client(struct notifier_block *nb) 158 { 159 return 0; 160 }; 161 162 static inline int fb_unregister_client(struct notifier_block *nb) 163 { 164 return 0; 165 }; 166 167 static inline int fb_notifier_call_chain(unsigned long val, void *v) 168 { 169 return 0; 170 }; 171 #endif 172 173 /* 174 * Pixmap structure definition 175 * 176 * The purpose of this structure is to translate data 177 * from the hardware independent format of fbdev to what 178 * format the hardware needs. 179 */ 180 181 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ 182 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ 183 #define FB_PIXMAP_IO 4 /* memory is iomapped */ 184 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ 185 186 struct fb_pixmap { 187 u8 *addr; /* pointer to memory */ 188 u32 size; /* size of buffer in bytes */ 189 u32 offset; /* current offset to buffer */ 190 u32 buf_align; /* byte alignment of each bitmap */ 191 u32 scan_align; /* alignment per scanline */ 192 u32 access_align; /* alignment per read/write (bits) */ 193 u32 flags; /* see FB_PIXMAP_* */ 194 u32 blit_x; /* supported bit block dimensions (1-32)*/ 195 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */ 196 /* blit_y = 1 << (height - 1) */ 197 /* if 0, will be set to 0xffffffff (all)*/ 198 /* access methods */ 199 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); 200 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); 201 }; 202 203 #ifdef CONFIG_FB_DEFERRED_IO 204 struct fb_deferred_io_pageref { 205 struct page *page; 206 unsigned long offset; 207 /* private */ 208 struct list_head list; 209 }; 210 211 struct fb_deferred_io { 212 /* delay between mkwrite and deferred handler */ 213 unsigned long delay; 214 bool sort_pagereflist; /* sort pagelist by offset */ 215 struct mutex lock; /* mutex that protects the pageref list */ 216 struct list_head pagereflist; /* list of pagerefs for touched pages */ 217 /* callback */ 218 void (*first_io)(struct fb_info *info); 219 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); 220 }; 221 #endif 222 223 /* 224 * Frame buffer operations 225 * 226 * LOCKING NOTE: those functions must _ALL_ be called with the console 227 * semaphore held, this is the only suitable locking mechanism we have 228 * in 2.6. Some may be called at interrupt time at this point though. 229 * 230 * The exception to this is the debug related hooks. Putting the fb 231 * into a debug state (e.g. flipping to the kernel console) and restoring 232 * it must be done in a lock-free manner, so low level drivers should 233 * keep track of the initial console (if applicable) and may need to 234 * perform direct, unlocked hardware writes in these hooks. 235 */ 236 237 struct fb_ops { 238 /* open/release and usage marking */ 239 struct module *owner; 240 int (*fb_open)(struct fb_info *info, int user); 241 int (*fb_release)(struct fb_info *info, int user); 242 243 /* For framebuffers with strange non linear layouts or that do not 244 * work with normal memory mapped access 245 */ 246 ssize_t (*fb_read)(struct fb_info *info, char __user *buf, 247 size_t count, loff_t *ppos); 248 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, 249 size_t count, loff_t *ppos); 250 251 /* checks var and eventually tweaks it to something supported, 252 * DO NOT MODIFY PAR */ 253 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); 254 255 /* set the video mode according to info->var */ 256 int (*fb_set_par)(struct fb_info *info); 257 258 /* set color register */ 259 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, 260 unsigned blue, unsigned transp, struct fb_info *info); 261 262 /* set color registers in batch */ 263 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); 264 265 /* blank display */ 266 int (*fb_blank)(int blank, struct fb_info *info); 267 268 /* pan display */ 269 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); 270 271 /* Draws a rectangle */ 272 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); 273 /* Copy data from area to another */ 274 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); 275 /* Draws a image to the display */ 276 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); 277 278 /* Draws cursor */ 279 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); 280 281 /* wait for blit idle, optional */ 282 int (*fb_sync)(struct fb_info *info); 283 284 /* perform fb specific ioctl (optional) */ 285 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, 286 unsigned long arg); 287 288 /* Handle 32bit compat ioctl (optional) */ 289 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, 290 unsigned long arg); 291 292 /* perform fb specific mmap */ 293 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); 294 295 /* get capability given var */ 296 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, 297 struct fb_var_screeninfo *var); 298 299 /* teardown any resources to do with this framebuffer */ 300 void (*fb_destroy)(struct fb_info *info); 301 302 /* called at KDB enter and leave time to prepare the console */ 303 int (*fb_debug_enter)(struct fb_info *info); 304 int (*fb_debug_leave)(struct fb_info *info); 305 }; 306 307 #ifdef CONFIG_FB_TILEBLITTING 308 #define FB_TILE_CURSOR_NONE 0 309 #define FB_TILE_CURSOR_UNDERLINE 1 310 #define FB_TILE_CURSOR_LOWER_THIRD 2 311 #define FB_TILE_CURSOR_LOWER_HALF 3 312 #define FB_TILE_CURSOR_TWO_THIRDS 4 313 #define FB_TILE_CURSOR_BLOCK 5 314 315 struct fb_tilemap { 316 __u32 width; /* width of each tile in pixels */ 317 __u32 height; /* height of each tile in scanlines */ 318 __u32 depth; /* color depth of each tile */ 319 __u32 length; /* number of tiles in the map */ 320 const __u8 *data; /* actual tile map: a bitmap array, packed 321 to the nearest byte */ 322 }; 323 324 struct fb_tilerect { 325 __u32 sx; /* origin in the x-axis */ 326 __u32 sy; /* origin in the y-axis */ 327 __u32 width; /* number of tiles in the x-axis */ 328 __u32 height; /* number of tiles in the y-axis */ 329 __u32 index; /* what tile to use: index to tile map */ 330 __u32 fg; /* foreground color */ 331 __u32 bg; /* background color */ 332 __u32 rop; /* raster operation */ 333 }; 334 335 struct fb_tilearea { 336 __u32 sx; /* source origin in the x-axis */ 337 __u32 sy; /* source origin in the y-axis */ 338 __u32 dx; /* destination origin in the x-axis */ 339 __u32 dy; /* destination origin in the y-axis */ 340 __u32 width; /* number of tiles in the x-axis */ 341 __u32 height; /* number of tiles in the y-axis */ 342 }; 343 344 struct fb_tileblit { 345 __u32 sx; /* origin in the x-axis */ 346 __u32 sy; /* origin in the y-axis */ 347 __u32 width; /* number of tiles in the x-axis */ 348 __u32 height; /* number of tiles in the y-axis */ 349 __u32 fg; /* foreground color */ 350 __u32 bg; /* background color */ 351 __u32 length; /* number of tiles to draw */ 352 __u32 *indices; /* array of indices to tile map */ 353 }; 354 355 struct fb_tilecursor { 356 __u32 sx; /* cursor position in the x-axis */ 357 __u32 sy; /* cursor position in the y-axis */ 358 __u32 mode; /* 0 = erase, 1 = draw */ 359 __u32 shape; /* see FB_TILE_CURSOR_* */ 360 __u32 fg; /* foreground color */ 361 __u32 bg; /* background color */ 362 }; 363 364 struct fb_tile_ops { 365 /* set tile characteristics */ 366 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); 367 368 /* all dimensions from hereon are in terms of tiles */ 369 370 /* move a rectangular region of tiles from one area to another*/ 371 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); 372 /* fill a rectangular region with a tile */ 373 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); 374 /* copy an array of tiles */ 375 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); 376 /* cursor */ 377 void (*fb_tilecursor)(struct fb_info *info, 378 struct fb_tilecursor *cursor); 379 /* get maximum length of the tile map */ 380 int (*fb_get_tilemax)(struct fb_info *info); 381 }; 382 #endif /* CONFIG_FB_TILEBLITTING */ 383 384 /* FBINFO_* = fb_info.flags bit flags */ 385 #define FBINFO_DEFAULT 0 386 #define FBINFO_HWACCEL_DISABLED 0x0002 387 /* When FBINFO_HWACCEL_DISABLED is set: 388 * Hardware acceleration is turned off. Software implementations 389 * of required functions (copyarea(), fillrect(), and imageblit()) 390 * takes over; acceleration engine should be in a quiescent state */ 391 392 /* hints */ 393 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ 394 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ 395 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ 396 397 /* hardware supported ops */ 398 /* semantics: when a bit is set, it indicates that the operation is 399 * accelerated by hardware. 400 * required functions will still work even if the bit is not set. 401 * optional functions may not even exist if the flag bit is not set. 402 */ 403 #define FBINFO_HWACCEL_NONE 0x0000 404 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ 405 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ 406 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ 407 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ 408 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ 409 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ 410 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ 411 412 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ 413 414 /* A driver may set this flag to indicate that it does want a set_par to be 415 * called every time when fbcon_switch is executed. The advantage is that with 416 * this flag set you can really be sure that set_par is always called before 417 * any of the functions dependent on the correct hardware state or altering 418 * that state, even if you are using some broken X releases. The disadvantage 419 * is that it introduces unwanted delays to every console switch if set_par 420 * is slow. It is a good idea to try this flag in the drivers initialization 421 * code whenever there is a bug report related to switching between X and the 422 * framebuffer console. 423 */ 424 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 425 426 /* where the fb is a firmware driver, and can be replaced with a proper one */ 427 #define FBINFO_MISC_FIRMWARE 0x80000 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 struct device *dev; /* This is this fb device */ 486 int class_flag; /* private sysfs flags */ 487 #ifdef CONFIG_FB_TILEBLITTING 488 struct fb_tile_ops *tileops; /* Tile Blitting */ 489 #endif 490 union { 491 char __iomem *screen_base; /* Virtual address */ 492 char *screen_buffer; 493 }; 494 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 495 void *pseudo_palette; /* Fake palette of 16 colors */ 496 #define FBINFO_STATE_RUNNING 0 497 #define FBINFO_STATE_SUSPENDED 1 498 u32 state; /* Hardware state i.e suspend */ 499 void *fbcon_par; /* fbcon use-only private area */ 500 /* From here on everything is device dependent */ 501 void *par; 502 /* we need the PCI or similar aperture base/size not 503 smem_start/size as smem_start may just be an object 504 allocated inside the aperture so may not actually overlap */ 505 struct apertures_struct { 506 unsigned int count; 507 struct aperture { 508 resource_size_t base; 509 resource_size_t size; 510 } ranges[0]; 511 } *apertures; 512 513 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 514 bool forced_out; /* set when being removed by another driver */ 515 }; 516 517 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) { 518 struct apertures_struct *a; 519 520 a = kzalloc(struct_size(a, ranges, max_num), GFP_KERNEL); 521 if (!a) 522 return NULL; 523 a->count = max_num; 524 return a; 525 } 526 527 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT 528 529 /* This will go away 530 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 531 * when it wants to turn the acceleration engine on. This is 532 * really a separate operation, and should be modified via sysfs. 533 * But for now, we leave it broken with the following define 534 */ 535 #define STUPID_ACCELF_TEXT_SHIT 536 537 // This will go away 538 #if defined(__sparc__) 539 540 /* We map all of our framebuffers such that big-endian accesses 541 * are what we want, so the following is sufficient. 542 */ 543 544 // This will go away 545 #define fb_readb sbus_readb 546 #define fb_readw sbus_readw 547 #define fb_readl sbus_readl 548 #define fb_readq sbus_readq 549 #define fb_writeb sbus_writeb 550 #define fb_writew sbus_writew 551 #define fb_writel sbus_writel 552 #define fb_writeq sbus_writeq 553 #define fb_memset sbus_memset_io 554 #define fb_memcpy_fromfb sbus_memcpy_fromio 555 #define fb_memcpy_tofb sbus_memcpy_toio 556 557 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \ 558 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \ 559 defined(__arm__) || defined(__aarch64__) 560 561 #define fb_readb __raw_readb 562 #define fb_readw __raw_readw 563 #define fb_readl __raw_readl 564 #define fb_readq __raw_readq 565 #define fb_writeb __raw_writeb 566 #define fb_writew __raw_writew 567 #define fb_writel __raw_writel 568 #define fb_writeq __raw_writeq 569 #define fb_memset memset_io 570 #define fb_memcpy_fromfb memcpy_fromio 571 #define fb_memcpy_tofb memcpy_toio 572 573 #else 574 575 #define fb_readb(addr) (*(volatile u8 *) (addr)) 576 #define fb_readw(addr) (*(volatile u16 *) (addr)) 577 #define fb_readl(addr) (*(volatile u32 *) (addr)) 578 #define fb_readq(addr) (*(volatile u64 *) (addr)) 579 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b)) 580 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b)) 581 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b)) 582 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b)) 583 #define fb_memset memset 584 #define fb_memcpy_fromfb memcpy 585 #define fb_memcpy_tofb memcpy 586 587 #endif 588 589 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 590 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 591 (val) << (bits)) 592 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 593 (val) >> (bits)) 594 595 /* 596 * `Generic' versions of the frame buffer device operations 597 */ 598 599 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 600 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 601 extern int fb_blank(struct fb_info *info, int blank); 602 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 603 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 604 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 605 /* 606 * Drawing operations where framebuffer is in system RAM 607 */ 608 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 609 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 610 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 611 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 612 size_t count, loff_t *ppos); 613 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 614 size_t count, loff_t *ppos); 615 616 /* drivers/video/fbmem.c */ 617 extern int register_framebuffer(struct fb_info *fb_info); 618 extern void unregister_framebuffer(struct fb_info *fb_info); 619 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, 620 const char *name); 621 extern int remove_conflicting_framebuffers(struct apertures_struct *a, 622 const char *name, bool primary); 623 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate); 624 extern int fb_show_logo(struct fb_info *fb_info, int rotate); 625 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 626 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 627 u32 height, u32 shift_high, u32 shift_low, u32 mod); 628 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 629 extern void fb_set_suspend(struct fb_info *info, int state); 630 extern int fb_get_color_depth(struct fb_var_screeninfo *var, 631 struct fb_fix_screeninfo *fix); 632 extern int fb_get_options(const char *name, char **option); 633 extern int fb_new_modelist(struct fb_info *info); 634 635 extern struct fb_info *registered_fb[FB_MAX]; 636 extern int num_registered_fb; 637 extern bool fb_center_logo; 638 extern int fb_logo_count; 639 extern struct class *fb_class; 640 641 #define for_each_registered_fb(i) \ 642 for (i = 0; i < FB_MAX; i++) \ 643 if (!registered_fb[i]) {} else 644 645 static inline void lock_fb_info(struct fb_info *info) 646 { 647 mutex_lock(&info->lock); 648 } 649 650 static inline void unlock_fb_info(struct fb_info *info) 651 { 652 mutex_unlock(&info->lock); 653 } 654 655 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 656 u8 *src, u32 s_pitch, u32 height) 657 { 658 u32 i, j; 659 660 d_pitch -= s_pitch; 661 662 for (i = height; i--; ) { 663 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 664 for (j = 0; j < s_pitch; j++) 665 *dst++ = *src++; 666 dst += d_pitch; 667 } 668 } 669 670 /* drivers/video/fb_defio.c */ 671 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 672 extern int fb_deferred_io_init(struct fb_info *info); 673 extern void fb_deferred_io_open(struct fb_info *info, 674 struct inode *inode, 675 struct file *file); 676 extern void fb_deferred_io_cleanup(struct fb_info *info); 677 extern int fb_deferred_io_fsync(struct file *file, loff_t start, 678 loff_t end, int datasync); 679 680 static inline bool fb_be_math(struct fb_info *info) 681 { 682 #ifdef CONFIG_FB_FOREIGN_ENDIAN 683 #if defined(CONFIG_FB_BOTH_ENDIAN) 684 return info->flags & FBINFO_BE_MATH; 685 #elif defined(CONFIG_FB_BIG_ENDIAN) 686 return true; 687 #elif defined(CONFIG_FB_LITTLE_ENDIAN) 688 return false; 689 #endif /* CONFIG_FB_BOTH_ENDIAN */ 690 #else 691 #ifdef __BIG_ENDIAN 692 return true; 693 #else 694 return false; 695 #endif /* __BIG_ENDIAN */ 696 #endif /* CONFIG_FB_FOREIGN_ENDIAN */ 697 } 698 699 /* drivers/video/fbsysfs.c */ 700 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 701 extern void framebuffer_release(struct fb_info *info); 702 extern int fb_init_device(struct fb_info *fb_info); 703 extern void fb_cleanup_device(struct fb_info *head); 704 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 705 706 /* drivers/video/fbmon.c */ 707 #define FB_MAXTIMINGS 0 708 #define FB_VSYNCTIMINGS 1 709 #define FB_HSYNCTIMINGS 2 710 #define FB_DCLKTIMINGS 3 711 #define FB_IGNOREMON 0x100 712 713 #define FB_MODE_IS_UNKNOWN 0 714 #define FB_MODE_IS_DETAILED 1 715 #define FB_MODE_IS_STANDARD 2 716 #define FB_MODE_IS_VESA 4 717 #define FB_MODE_IS_CALCULATED 8 718 #define FB_MODE_IS_FIRST 16 719 #define FB_MODE_IS_FROM_VAR 32 720 721 extern int fbmon_dpms(const struct fb_info *fb_info); 722 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 723 struct fb_info *info); 724 extern int fb_validate_mode(const struct fb_var_screeninfo *var, 725 struct fb_info *info); 726 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 727 extern const unsigned char *fb_firmware_edid(struct device *device); 728 extern void fb_edid_to_monspecs(unsigned char *edid, 729 struct fb_monspecs *specs); 730 extern void fb_destroy_modedb(struct fb_videomode *modedb); 731 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 732 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 733 734 extern int of_get_fb_videomode(struct device_node *np, 735 struct fb_videomode *fb, 736 int index); 737 extern int fb_videomode_from_videomode(const struct videomode *vm, 738 struct fb_videomode *fbmode); 739 740 /* drivers/video/modedb.c */ 741 #define VESA_MODEDB_SIZE 43 742 #define DMT_SIZE 0x50 743 744 extern void fb_var_to_videomode(struct fb_videomode *mode, 745 const struct fb_var_screeninfo *var); 746 extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 747 const struct fb_videomode *mode); 748 extern int fb_mode_is_equal(const struct fb_videomode *mode1, 749 const struct fb_videomode *mode2); 750 extern int fb_add_videomode(const struct fb_videomode *mode, 751 struct list_head *head); 752 extern void fb_delete_videomode(const struct fb_videomode *mode, 753 struct list_head *head); 754 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 755 struct list_head *head); 756 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 757 struct list_head *head); 758 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 759 struct list_head *head); 760 extern void fb_destroy_modelist(struct list_head *head); 761 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 762 struct list_head *head); 763 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 764 struct list_head *head); 765 766 /* drivers/video/fbcmap.c */ 767 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 768 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 769 extern void fb_dealloc_cmap(struct fb_cmap *cmap); 770 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 771 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 772 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 773 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 774 extern const struct fb_cmap *fb_default_cmap(int len); 775 extern void fb_invert_cmaps(void); 776 777 struct fb_videomode { 778 const char *name; /* optional */ 779 u32 refresh; /* optional */ 780 u32 xres; 781 u32 yres; 782 u32 pixclock; 783 u32 left_margin; 784 u32 right_margin; 785 u32 upper_margin; 786 u32 lower_margin; 787 u32 hsync_len; 788 u32 vsync_len; 789 u32 sync; 790 u32 vmode; 791 u32 flag; 792 }; 793 794 struct dmt_videomode { 795 u32 dmt_id; 796 u32 std_2byte_code; 797 u32 cvt_3byte_code; 798 const struct fb_videomode *mode; 799 }; 800 801 extern const char *fb_mode_option; 802 extern const struct fb_videomode vesa_modes[]; 803 extern const struct dmt_videomode dmt_modes[]; 804 805 struct fb_modelist { 806 struct list_head list; 807 struct fb_videomode mode; 808 }; 809 810 extern int fb_find_mode(struct fb_var_screeninfo *var, 811 struct fb_info *info, const char *mode_option, 812 const struct fb_videomode *db, 813 unsigned int dbsize, 814 const struct fb_videomode *default_mode, 815 unsigned int default_bpp); 816 817 /* Convenience logging macros */ 818 #define fb_err(fb_info, fmt, ...) \ 819 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 820 #define fb_notice(info, fmt, ...) \ 821 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 822 #define fb_warn(fb_info, fmt, ...) \ 823 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 824 #define fb_info(fb_info, fmt, ...) \ 825 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 826 #define fb_dbg(fb_info, fmt, ...) \ 827 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 828 829 #endif /* _LINUX_FB_H */ 830