1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_FB_H 3 #define _LINUX_FB_H 4 5 #include <linux/kgdb.h> 6 #include <uapi/linux/fb.h> 7 8 #define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user) 9 10 #include <linux/fs.h> 11 #include <linux/init.h> 12 #include <linux/workqueue.h> 13 #include <linux/notifier.h> 14 #include <linux/list.h> 15 #include <linux/backlight.h> 16 #include <linux/slab.h> 17 #include <asm/io.h> 18 19 struct vm_area_struct; 20 struct fb_info; 21 struct device; 22 struct file; 23 struct videomode; 24 struct device_node; 25 26 /* Definitions below are used in the parsed monitor specs */ 27 #define FB_DPMS_ACTIVE_OFF 1 28 #define FB_DPMS_SUSPEND 2 29 #define FB_DPMS_STANDBY 4 30 31 #define FB_DISP_DDI 1 32 #define FB_DISP_ANA_700_300 2 33 #define FB_DISP_ANA_714_286 4 34 #define FB_DISP_ANA_1000_400 8 35 #define FB_DISP_ANA_700_000 16 36 37 #define FB_DISP_MONO 32 38 #define FB_DISP_RGB 64 39 #define FB_DISP_MULTI 128 40 #define FB_DISP_UNKNOWN 256 41 42 #define FB_SIGNAL_NONE 0 43 #define FB_SIGNAL_BLANK_BLANK 1 44 #define FB_SIGNAL_SEPARATE 2 45 #define FB_SIGNAL_COMPOSITE 4 46 #define FB_SIGNAL_SYNC_ON_GREEN 8 47 #define FB_SIGNAL_SERRATION_ON 16 48 49 #define FB_MISC_PRIM_COLOR 1 50 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */ 51 #define FB_MISC_HDMI 4 52 struct fb_chroma { 53 __u32 redx; /* in fraction of 1024 */ 54 __u32 greenx; 55 __u32 bluex; 56 __u32 whitex; 57 __u32 redy; 58 __u32 greeny; 59 __u32 bluey; 60 __u32 whitey; 61 }; 62 63 struct fb_monspecs { 64 struct fb_chroma chroma; 65 struct fb_videomode *modedb; /* mode database */ 66 __u8 manufacturer[4]; /* Manufacturer */ 67 __u8 monitor[14]; /* Monitor String */ 68 __u8 serial_no[14]; /* Serial Number */ 69 __u8 ascii[14]; /* ? */ 70 __u32 modedb_len; /* mode database length */ 71 __u32 model; /* Monitor Model */ 72 __u32 serial; /* Serial Number - Integer */ 73 __u32 year; /* Year manufactured */ 74 __u32 week; /* Week Manufactured */ 75 __u32 hfmin; /* hfreq lower limit (Hz) */ 76 __u32 hfmax; /* hfreq upper limit (Hz) */ 77 __u32 dclkmin; /* pixelclock lower limit (Hz) */ 78 __u32 dclkmax; /* pixelclock upper limit (Hz) */ 79 __u16 input; /* display type - see FB_DISP_* */ 80 __u16 dpms; /* DPMS support - see FB_DPMS_ */ 81 __u16 signal; /* Signal Type - see FB_SIGNAL_* */ 82 __u16 vfmin; /* vfreq lower limit (Hz) */ 83 __u16 vfmax; /* vfreq upper limit (Hz) */ 84 __u16 gamma; /* Gamma - in fractions of 100 */ 85 __u16 gtf : 1; /* supports GTF */ 86 __u16 misc; /* Misc flags - see FB_MISC_* */ 87 __u8 version; /* EDID version... */ 88 __u8 revision; /* ...and revision */ 89 __u8 max_x; /* Maximum horizontal size (cm) */ 90 __u8 max_y; /* Maximum vertical size (cm) */ 91 }; 92 93 struct fb_cmap_user { 94 __u32 start; /* First entry */ 95 __u32 len; /* Number of entries */ 96 __u16 __user *red; /* Red values */ 97 __u16 __user *green; 98 __u16 __user *blue; 99 __u16 __user *transp; /* transparency, can be NULL */ 100 }; 101 102 struct fb_image_user { 103 __u32 dx; /* Where to place image */ 104 __u32 dy; 105 __u32 width; /* Size of image */ 106 __u32 height; 107 __u32 fg_color; /* Only used when a mono bitmap */ 108 __u32 bg_color; 109 __u8 depth; /* Depth of the image */ 110 const char __user *data; /* Pointer to image data */ 111 struct fb_cmap_user cmap; /* color map info */ 112 }; 113 114 struct fb_cursor_user { 115 __u16 set; /* what to set */ 116 __u16 enable; /* cursor on/off */ 117 __u16 rop; /* bitop operation */ 118 const char __user *mask; /* cursor mask bits */ 119 struct fbcurpos hot; /* cursor hot spot */ 120 struct fb_image_user image; /* Cursor image */ 121 }; 122 123 /* 124 * Register/unregister for framebuffer events 125 */ 126 127 /* The resolution of the passed in fb_info about to change */ 128 #define FB_EVENT_MODE_CHANGE 0x01 129 130 #ifdef CONFIG_GUMSTIX_AM200EPD 131 /* only used by mach-pxa/am200epd.c */ 132 #define FB_EVENT_FB_REGISTERED 0x05 133 #define FB_EVENT_FB_UNREGISTERED 0x06 134 #endif 135 136 /* A display blank is requested */ 137 #define FB_EVENT_BLANK 0x09 138 139 struct fb_event { 140 struct fb_info *info; 141 void *data; 142 }; 143 144 struct fb_blit_caps { 145 u32 x; 146 u32 y; 147 u32 len; 148 u32 flags; 149 }; 150 151 #ifdef CONFIG_FB_NOTIFY 152 extern int fb_register_client(struct notifier_block *nb); 153 extern int fb_unregister_client(struct notifier_block *nb); 154 extern int fb_notifier_call_chain(unsigned long val, void *v); 155 #else 156 static inline int fb_register_client(struct notifier_block *nb) 157 { 158 return 0; 159 }; 160 161 static inline int fb_unregister_client(struct notifier_block *nb) 162 { 163 return 0; 164 }; 165 166 static inline int fb_notifier_call_chain(unsigned long val, void *v) 167 { 168 return 0; 169 }; 170 #endif 171 172 /* 173 * Pixmap structure definition 174 * 175 * The purpose of this structure is to translate data 176 * from the hardware independent format of fbdev to what 177 * format the hardware needs. 178 */ 179 180 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ 181 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ 182 #define FB_PIXMAP_IO 4 /* memory is iomapped */ 183 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ 184 185 struct fb_pixmap { 186 u8 *addr; /* pointer to memory */ 187 u32 size; /* size of buffer in bytes */ 188 u32 offset; /* current offset to buffer */ 189 u32 buf_align; /* byte alignment of each bitmap */ 190 u32 scan_align; /* alignment per scanline */ 191 u32 access_align; /* alignment per read/write (bits) */ 192 u32 flags; /* see FB_PIXMAP_* */ 193 u32 blit_x; /* supported bit block dimensions (1-32)*/ 194 u32 blit_y; /* Format: blit_x = 1 << (width - 1) */ 195 /* blit_y = 1 << (height - 1) */ 196 /* if 0, will be set to 0xffffffff (all)*/ 197 /* access methods */ 198 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); 199 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); 200 }; 201 202 #ifdef CONFIG_FB_DEFERRED_IO 203 struct fb_deferred_io { 204 /* delay between mkwrite and deferred handler */ 205 unsigned long delay; 206 struct mutex lock; /* mutex that protects the page list */ 207 struct list_head pagelist; /* list of touched pages */ 208 /* callback */ 209 void (*first_io)(struct fb_info *info); 210 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); 211 }; 212 #endif 213 214 /* 215 * Frame buffer operations 216 * 217 * LOCKING NOTE: those functions must _ALL_ be called with the console 218 * semaphore held, this is the only suitable locking mechanism we have 219 * in 2.6. Some may be called at interrupt time at this point though. 220 * 221 * The exception to this is the debug related hooks. Putting the fb 222 * into a debug state (e.g. flipping to the kernel console) and restoring 223 * it must be done in a lock-free manner, so low level drivers should 224 * keep track of the initial console (if applicable) and may need to 225 * perform direct, unlocked hardware writes in these hooks. 226 */ 227 228 struct fb_ops { 229 /* open/release and usage marking */ 230 struct module *owner; 231 int (*fb_open)(struct fb_info *info, int user); 232 int (*fb_release)(struct fb_info *info, int user); 233 234 /* For framebuffers with strange non linear layouts or that do not 235 * work with normal memory mapped access 236 */ 237 ssize_t (*fb_read)(struct fb_info *info, char __user *buf, 238 size_t count, loff_t *ppos); 239 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, 240 size_t count, loff_t *ppos); 241 242 /* checks var and eventually tweaks it to something supported, 243 * DO NOT MODIFY PAR */ 244 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); 245 246 /* set the video mode according to info->var */ 247 int (*fb_set_par)(struct fb_info *info); 248 249 /* set color register */ 250 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, 251 unsigned blue, unsigned transp, struct fb_info *info); 252 253 /* set color registers in batch */ 254 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); 255 256 /* blank display */ 257 int (*fb_blank)(int blank, struct fb_info *info); 258 259 /* pan display */ 260 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); 261 262 /* Draws a rectangle */ 263 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); 264 /* Copy data from area to another */ 265 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); 266 /* Draws a image to the display */ 267 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); 268 269 /* Draws cursor */ 270 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); 271 272 /* wait for blit idle, optional */ 273 int (*fb_sync)(struct fb_info *info); 274 275 /* perform fb specific ioctl (optional) */ 276 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, 277 unsigned long arg); 278 279 /* Handle 32bit compat ioctl (optional) */ 280 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, 281 unsigned long arg); 282 283 /* perform fb specific mmap */ 284 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); 285 286 /* get capability given var */ 287 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, 288 struct fb_var_screeninfo *var); 289 290 /* teardown any resources to do with this framebuffer */ 291 void (*fb_destroy)(struct fb_info *info); 292 293 /* called at KDB enter and leave time to prepare the console */ 294 int (*fb_debug_enter)(struct fb_info *info); 295 int (*fb_debug_leave)(struct fb_info *info); 296 }; 297 298 #ifdef CONFIG_FB_TILEBLITTING 299 #define FB_TILE_CURSOR_NONE 0 300 #define FB_TILE_CURSOR_UNDERLINE 1 301 #define FB_TILE_CURSOR_LOWER_THIRD 2 302 #define FB_TILE_CURSOR_LOWER_HALF 3 303 #define FB_TILE_CURSOR_TWO_THIRDS 4 304 #define FB_TILE_CURSOR_BLOCK 5 305 306 struct fb_tilemap { 307 __u32 width; /* width of each tile in pixels */ 308 __u32 height; /* height of each tile in scanlines */ 309 __u32 depth; /* color depth of each tile */ 310 __u32 length; /* number of tiles in the map */ 311 const __u8 *data; /* actual tile map: a bitmap array, packed 312 to the nearest byte */ 313 }; 314 315 struct fb_tilerect { 316 __u32 sx; /* origin in the x-axis */ 317 __u32 sy; /* origin in the y-axis */ 318 __u32 width; /* number of tiles in the x-axis */ 319 __u32 height; /* number of tiles in the y-axis */ 320 __u32 index; /* what tile to use: index to tile map */ 321 __u32 fg; /* foreground color */ 322 __u32 bg; /* background color */ 323 __u32 rop; /* raster operation */ 324 }; 325 326 struct fb_tilearea { 327 __u32 sx; /* source origin in the x-axis */ 328 __u32 sy; /* source origin in the y-axis */ 329 __u32 dx; /* destination origin in the x-axis */ 330 __u32 dy; /* destination origin in the y-axis */ 331 __u32 width; /* number of tiles in the x-axis */ 332 __u32 height; /* number of tiles in the y-axis */ 333 }; 334 335 struct fb_tileblit { 336 __u32 sx; /* origin in the x-axis */ 337 __u32 sy; /* origin in the y-axis */ 338 __u32 width; /* number of tiles in the x-axis */ 339 __u32 height; /* number of tiles in the y-axis */ 340 __u32 fg; /* foreground color */ 341 __u32 bg; /* background color */ 342 __u32 length; /* number of tiles to draw */ 343 __u32 *indices; /* array of indices to tile map */ 344 }; 345 346 struct fb_tilecursor { 347 __u32 sx; /* cursor position in the x-axis */ 348 __u32 sy; /* cursor position in the y-axis */ 349 __u32 mode; /* 0 = erase, 1 = draw */ 350 __u32 shape; /* see FB_TILE_CURSOR_* */ 351 __u32 fg; /* foreground color */ 352 __u32 bg; /* background color */ 353 }; 354 355 struct fb_tile_ops { 356 /* set tile characteristics */ 357 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); 358 359 /* all dimensions from hereon are in terms of tiles */ 360 361 /* move a rectangular region of tiles from one area to another*/ 362 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); 363 /* fill a rectangular region with a tile */ 364 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); 365 /* copy an array of tiles */ 366 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); 367 /* cursor */ 368 void (*fb_tilecursor)(struct fb_info *info, 369 struct fb_tilecursor *cursor); 370 /* get maximum length of the tile map */ 371 int (*fb_get_tilemax)(struct fb_info *info); 372 }; 373 #endif /* CONFIG_FB_TILEBLITTING */ 374 375 /* FBINFO_* = fb_info.flags bit flags */ 376 #define FBINFO_DEFAULT 0 377 #define FBINFO_HWACCEL_DISABLED 0x0002 378 /* When FBINFO_HWACCEL_DISABLED is set: 379 * Hardware acceleration is turned off. Software implementations 380 * of required functions (copyarea(), fillrect(), and imageblit()) 381 * takes over; acceleration engine should be in a quiescent state */ 382 383 /* hints */ 384 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ 385 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ 386 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ 387 388 /* hardware supported ops */ 389 /* semantics: when a bit is set, it indicates that the operation is 390 * accelerated by hardware. 391 * required functions will still work even if the bit is not set. 392 * optional functions may not even exist if the flag bit is not set. 393 */ 394 #define FBINFO_HWACCEL_NONE 0x0000 395 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ 396 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ 397 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ 398 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ 399 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ 400 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ 401 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ 402 403 #define FBINFO_MISC_USEREVENT 0x10000 /* event request 404 from userspace */ 405 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ 406 407 /* A driver may set this flag to indicate that it does want a set_par to be 408 * called every time when fbcon_switch is executed. The advantage is that with 409 * this flag set you can really be sure that set_par is always called before 410 * any of the functions dependent on the correct hardware state or altering 411 * that state, even if you are using some broken X releases. The disadvantage 412 * is that it introduces unwanted delays to every console switch if set_par 413 * is slow. It is a good idea to try this flag in the drivers initialization 414 * code whenever there is a bug report related to switching between X and the 415 * framebuffer console. 416 */ 417 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 418 419 /* where the fb is a firmware driver, and can be replaced with a proper one */ 420 #define FBINFO_MISC_FIRMWARE 0x80000 421 /* 422 * Host and GPU endianness differ. 423 */ 424 #define FBINFO_FOREIGN_ENDIAN 0x100000 425 /* 426 * Big endian math. This is the same flags as above, but with different 427 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag 428 * and host endianness. Drivers should not use this flag. 429 */ 430 #define FBINFO_BE_MATH 0x100000 431 /* 432 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM 433 * drivers to stop userspace from trying to share buffers behind the kernel's 434 * back. Instead dma-buf based buffer sharing should be used. 435 */ 436 #define FBINFO_HIDE_SMEM_START 0x200000 437 438 439 struct fb_info { 440 atomic_t count; 441 int node; 442 int flags; 443 /* 444 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows 445 * a lcd is not mounted upright and fbcon should rotate to compensate. 446 */ 447 int fbcon_rotate_hint; 448 struct mutex lock; /* Lock for open/release/ioctl funcs */ 449 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */ 450 struct fb_var_screeninfo var; /* Current var */ 451 struct fb_fix_screeninfo fix; /* Current fix */ 452 struct fb_monspecs monspecs; /* Current Monitor specs */ 453 struct work_struct queue; /* Framebuffer event queue */ 454 struct fb_pixmap pixmap; /* Image hardware mapper */ 455 struct fb_pixmap sprite; /* Cursor hardware mapper */ 456 struct fb_cmap cmap; /* Current cmap */ 457 struct list_head modelist; /* mode list */ 458 struct fb_videomode *mode; /* current mode */ 459 460 #if IS_ENABLED(CONFIG_FB_BACKLIGHT) 461 /* assigned backlight device */ 462 /* set before framebuffer registration, 463 remove after unregister */ 464 struct backlight_device *bl_dev; 465 466 /* Backlight level curve */ 467 struct mutex bl_curve_mutex; 468 u8 bl_curve[FB_BACKLIGHT_LEVELS]; 469 #endif 470 #ifdef CONFIG_FB_DEFERRED_IO 471 struct delayed_work deferred_work; 472 struct fb_deferred_io *fbdefio; 473 #endif 474 475 struct fb_ops *fbops; 476 struct device *device; /* This is the parent */ 477 struct device *dev; /* This is this fb device */ 478 int class_flag; /* private sysfs flags */ 479 #ifdef CONFIG_FB_TILEBLITTING 480 struct fb_tile_ops *tileops; /* Tile Blitting */ 481 #endif 482 union { 483 char __iomem *screen_base; /* Virtual address */ 484 char *screen_buffer; 485 }; 486 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 487 void *pseudo_palette; /* Fake palette of 16 colors */ 488 #define FBINFO_STATE_RUNNING 0 489 #define FBINFO_STATE_SUSPENDED 1 490 u32 state; /* Hardware state i.e suspend */ 491 void *fbcon_par; /* fbcon use-only private area */ 492 /* From here on everything is device dependent */ 493 void *par; 494 /* we need the PCI or similar aperture base/size not 495 smem_start/size as smem_start may just be an object 496 allocated inside the aperture so may not actually overlap */ 497 struct apertures_struct { 498 unsigned int count; 499 struct aperture { 500 resource_size_t base; 501 resource_size_t size; 502 } ranges[0]; 503 } *apertures; 504 505 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 506 }; 507 508 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) { 509 struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct) 510 + max_num * sizeof(struct aperture), GFP_KERNEL); 511 if (!a) 512 return NULL; 513 a->count = max_num; 514 return a; 515 } 516 517 #define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT 518 519 /* This will go away 520 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 521 * when it wants to turn the acceleration engine on. This is 522 * really a separate operation, and should be modified via sysfs. 523 * But for now, we leave it broken with the following define 524 */ 525 #define STUPID_ACCELF_TEXT_SHIT 526 527 // This will go away 528 #if defined(__sparc__) 529 530 /* We map all of our framebuffers such that big-endian accesses 531 * are what we want, so the following is sufficient. 532 */ 533 534 // This will go away 535 #define fb_readb sbus_readb 536 #define fb_readw sbus_readw 537 #define fb_readl sbus_readl 538 #define fb_readq sbus_readq 539 #define fb_writeb sbus_writeb 540 #define fb_writew sbus_writew 541 #define fb_writel sbus_writel 542 #define fb_writeq sbus_writeq 543 #define fb_memset sbus_memset_io 544 #define fb_memcpy_fromfb sbus_memcpy_fromio 545 #define fb_memcpy_tofb sbus_memcpy_toio 546 547 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \ 548 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \ 549 defined(__arm__) || defined(__aarch64__) 550 551 #define fb_readb __raw_readb 552 #define fb_readw __raw_readw 553 #define fb_readl __raw_readl 554 #define fb_readq __raw_readq 555 #define fb_writeb __raw_writeb 556 #define fb_writew __raw_writew 557 #define fb_writel __raw_writel 558 #define fb_writeq __raw_writeq 559 #define fb_memset memset_io 560 #define fb_memcpy_fromfb memcpy_fromio 561 #define fb_memcpy_tofb memcpy_toio 562 563 #else 564 565 #define fb_readb(addr) (*(volatile u8 *) (addr)) 566 #define fb_readw(addr) (*(volatile u16 *) (addr)) 567 #define fb_readl(addr) (*(volatile u32 *) (addr)) 568 #define fb_readq(addr) (*(volatile u64 *) (addr)) 569 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b)) 570 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b)) 571 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b)) 572 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b)) 573 #define fb_memset memset 574 #define fb_memcpy_fromfb memcpy 575 #define fb_memcpy_tofb memcpy 576 577 #endif 578 579 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 580 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 581 (val) << (bits)) 582 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 583 (val) >> (bits)) 584 585 /* 586 * `Generic' versions of the frame buffer device operations 587 */ 588 589 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 590 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 591 extern int fb_blank(struct fb_info *info, int blank); 592 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 593 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 594 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 595 /* 596 * Drawing operations where framebuffer is in system RAM 597 */ 598 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 599 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 600 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 601 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 602 size_t count, loff_t *ppos); 603 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 604 size_t count, loff_t *ppos); 605 606 /* drivers/video/fbmem.c */ 607 extern int register_framebuffer(struct fb_info *fb_info); 608 extern void unregister_framebuffer(struct fb_info *fb_info); 609 extern void unlink_framebuffer(struct fb_info *fb_info); 610 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, 611 const char *name); 612 extern int remove_conflicting_framebuffers(struct apertures_struct *a, 613 const char *name, bool primary); 614 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate); 615 extern int fb_show_logo(struct fb_info *fb_info, int rotate); 616 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 617 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 618 u32 height, u32 shift_high, u32 shift_low, u32 mod); 619 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 620 extern void fb_set_suspend(struct fb_info *info, int state); 621 extern int fb_get_color_depth(struct fb_var_screeninfo *var, 622 struct fb_fix_screeninfo *fix); 623 extern int fb_get_options(const char *name, char **option); 624 extern int fb_new_modelist(struct fb_info *info); 625 626 extern struct fb_info *registered_fb[FB_MAX]; 627 extern int num_registered_fb; 628 extern bool fb_center_logo; 629 extern struct class *fb_class; 630 631 #define for_each_registered_fb(i) \ 632 for (i = 0; i < FB_MAX; i++) \ 633 if (!registered_fb[i]) {} else 634 635 static inline void lock_fb_info(struct fb_info *info) 636 { 637 mutex_lock(&info->lock); 638 } 639 640 static inline void unlock_fb_info(struct fb_info *info) 641 { 642 mutex_unlock(&info->lock); 643 } 644 645 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 646 u8 *src, u32 s_pitch, u32 height) 647 { 648 u32 i, j; 649 650 d_pitch -= s_pitch; 651 652 for (i = height; i--; ) { 653 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 654 for (j = 0; j < s_pitch; j++) 655 *dst++ = *src++; 656 dst += d_pitch; 657 } 658 } 659 660 /* drivers/video/fb_defio.c */ 661 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 662 extern void fb_deferred_io_init(struct fb_info *info); 663 extern void fb_deferred_io_open(struct fb_info *info, 664 struct inode *inode, 665 struct file *file); 666 extern void fb_deferred_io_cleanup(struct fb_info *info); 667 extern int fb_deferred_io_fsync(struct file *file, loff_t start, 668 loff_t end, int datasync); 669 670 static inline bool fb_be_math(struct fb_info *info) 671 { 672 #ifdef CONFIG_FB_FOREIGN_ENDIAN 673 #if defined(CONFIG_FB_BOTH_ENDIAN) 674 return info->flags & FBINFO_BE_MATH; 675 #elif defined(CONFIG_FB_BIG_ENDIAN) 676 return true; 677 #elif defined(CONFIG_FB_LITTLE_ENDIAN) 678 return false; 679 #endif /* CONFIG_FB_BOTH_ENDIAN */ 680 #else 681 #ifdef __BIG_ENDIAN 682 return true; 683 #else 684 return false; 685 #endif /* __BIG_ENDIAN */ 686 #endif /* CONFIG_FB_FOREIGN_ENDIAN */ 687 } 688 689 /* drivers/video/fbsysfs.c */ 690 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 691 extern void framebuffer_release(struct fb_info *info); 692 extern int fb_init_device(struct fb_info *fb_info); 693 extern void fb_cleanup_device(struct fb_info *head); 694 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 695 696 /* drivers/video/fbmon.c */ 697 #define FB_MAXTIMINGS 0 698 #define FB_VSYNCTIMINGS 1 699 #define FB_HSYNCTIMINGS 2 700 #define FB_DCLKTIMINGS 3 701 #define FB_IGNOREMON 0x100 702 703 #define FB_MODE_IS_UNKNOWN 0 704 #define FB_MODE_IS_DETAILED 1 705 #define FB_MODE_IS_STANDARD 2 706 #define FB_MODE_IS_VESA 4 707 #define FB_MODE_IS_CALCULATED 8 708 #define FB_MODE_IS_FIRST 16 709 #define FB_MODE_IS_FROM_VAR 32 710 711 extern int fbmon_dpms(const struct fb_info *fb_info); 712 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 713 struct fb_info *info); 714 extern int fb_validate_mode(const struct fb_var_screeninfo *var, 715 struct fb_info *info); 716 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 717 extern const unsigned char *fb_firmware_edid(struct device *device); 718 extern void fb_edid_to_monspecs(unsigned char *edid, 719 struct fb_monspecs *specs); 720 extern void fb_destroy_modedb(struct fb_videomode *modedb); 721 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 722 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 723 724 extern int of_get_fb_videomode(struct device_node *np, 725 struct fb_videomode *fb, 726 int index); 727 extern int fb_videomode_from_videomode(const struct videomode *vm, 728 struct fb_videomode *fbmode); 729 730 /* drivers/video/modedb.c */ 731 #define VESA_MODEDB_SIZE 43 732 #define DMT_SIZE 0x50 733 734 extern void fb_var_to_videomode(struct fb_videomode *mode, 735 const struct fb_var_screeninfo *var); 736 extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 737 const struct fb_videomode *mode); 738 extern int fb_mode_is_equal(const struct fb_videomode *mode1, 739 const struct fb_videomode *mode2); 740 extern int fb_add_videomode(const struct fb_videomode *mode, 741 struct list_head *head); 742 extern void fb_delete_videomode(const struct fb_videomode *mode, 743 struct list_head *head); 744 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 745 struct list_head *head); 746 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 747 struct list_head *head); 748 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 749 struct list_head *head); 750 extern void fb_destroy_modelist(struct list_head *head); 751 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 752 struct list_head *head); 753 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 754 struct list_head *head); 755 756 /* drivers/video/fbcmap.c */ 757 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 758 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 759 extern void fb_dealloc_cmap(struct fb_cmap *cmap); 760 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 761 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 762 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 763 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 764 extern const struct fb_cmap *fb_default_cmap(int len); 765 extern void fb_invert_cmaps(void); 766 767 struct fb_videomode { 768 const char *name; /* optional */ 769 u32 refresh; /* optional */ 770 u32 xres; 771 u32 yres; 772 u32 pixclock; 773 u32 left_margin; 774 u32 right_margin; 775 u32 upper_margin; 776 u32 lower_margin; 777 u32 hsync_len; 778 u32 vsync_len; 779 u32 sync; 780 u32 vmode; 781 u32 flag; 782 }; 783 784 struct dmt_videomode { 785 u32 dmt_id; 786 u32 std_2byte_code; 787 u32 cvt_3byte_code; 788 const struct fb_videomode *mode; 789 }; 790 791 extern const char *fb_mode_option; 792 extern const struct fb_videomode vesa_modes[]; 793 extern const struct dmt_videomode dmt_modes[]; 794 795 struct fb_modelist { 796 struct list_head list; 797 struct fb_videomode mode; 798 }; 799 800 extern int fb_find_mode(struct fb_var_screeninfo *var, 801 struct fb_info *info, const char *mode_option, 802 const struct fb_videomode *db, 803 unsigned int dbsize, 804 const struct fb_videomode *default_mode, 805 unsigned int default_bpp); 806 807 /* Convenience logging macros */ 808 #define fb_err(fb_info, fmt, ...) \ 809 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 810 #define fb_notice(info, fmt, ...) \ 811 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 812 #define fb_warn(fb_info, fmt, ...) \ 813 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 814 #define fb_info(fb_info, fmt, ...) \ 815 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 816 #define fb_dbg(fb_info, fmt, ...) \ 817 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 818 819 #endif /* _LINUX_FB_H */ 820