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/video.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 /* Enough for the VT console needs, see its max_font_width/height */ 149 #define FB_MAX_BLIT_WIDTH 64 150 #define FB_MAX_BLIT_HEIGHT 128 151 152 struct fb_blit_caps { 153 DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH); 154 DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT); 155 u32 len; 156 u32 flags; 157 }; 158 159 #ifdef CONFIG_FB_NOTIFY 160 extern int fb_register_client(struct notifier_block *nb); 161 extern int fb_unregister_client(struct notifier_block *nb); 162 extern int fb_notifier_call_chain(unsigned long val, void *v); 163 #else fb_register_client(struct notifier_block * nb)164 static inline int fb_register_client(struct notifier_block *nb) 165 { 166 return 0; 167 }; 168 fb_unregister_client(struct notifier_block * nb)169 static inline int fb_unregister_client(struct notifier_block *nb) 170 { 171 return 0; 172 }; 173 fb_notifier_call_chain(unsigned long val,void * v)174 static inline int fb_notifier_call_chain(unsigned long val, void *v) 175 { 176 return 0; 177 }; 178 #endif 179 180 /* 181 * Pixmap structure definition 182 * 183 * The purpose of this structure is to translate data 184 * from the hardware independent format of fbdev to what 185 * format the hardware needs. 186 */ 187 188 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ 189 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ 190 #define FB_PIXMAP_IO 4 /* memory is iomapped */ 191 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ 192 193 struct fb_pixmap { 194 u8 *addr; /* pointer to memory */ 195 u32 size; /* size of buffer in bytes */ 196 u32 offset; /* current offset to buffer */ 197 u32 buf_align; /* byte alignment of each bitmap */ 198 u32 scan_align; /* alignment per scanline */ 199 u32 access_align; /* alignment per read/write (bits) */ 200 u32 flags; /* see FB_PIXMAP_* */ 201 /* supported bit block dimensions */ 202 /* Format: test_bit(width - 1, blit_x) */ 203 /* test_bit(height - 1, blit_y) */ 204 /* if zero, will be set to full (all) */ 205 DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH); 206 DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT); 207 /* access methods */ 208 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); 209 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); 210 }; 211 212 #ifdef CONFIG_FB_DEFERRED_IO 213 struct fb_deferred_io_pageref { 214 struct page *page; 215 unsigned long offset; 216 /* private */ 217 struct list_head list; 218 }; 219 220 struct fb_deferred_io { 221 /* delay between mkwrite and deferred handler */ 222 unsigned long delay; 223 bool sort_pagereflist; /* sort pagelist by offset */ 224 int open_count; /* number of opened files; protected by fb_info lock */ 225 struct mutex lock; /* mutex that protects the pageref list */ 226 struct list_head pagereflist; /* list of pagerefs for touched pages */ 227 /* callback */ 228 struct page *(*get_page)(struct fb_info *info, unsigned long offset); 229 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); 230 }; 231 #endif 232 233 /* 234 * Frame buffer operations 235 * 236 * LOCKING NOTE: those functions must _ALL_ be called with the console 237 * semaphore held, this is the only suitable locking mechanism we have 238 * in 2.6. Some may be called at interrupt time at this point though. 239 * 240 * The exception to this is the debug related hooks. Putting the fb 241 * into a debug state (e.g. flipping to the kernel console) and restoring 242 * it must be done in a lock-free manner, so low level drivers should 243 * keep track of the initial console (if applicable) and may need to 244 * perform direct, unlocked hardware writes in these hooks. 245 */ 246 247 struct fb_ops { 248 /* open/release and usage marking */ 249 struct module *owner; 250 int (*fb_open)(struct fb_info *info, int user); 251 int (*fb_release)(struct fb_info *info, int user); 252 253 /* For framebuffers with strange non linear layouts or that do not 254 * work with normal memory mapped access 255 */ 256 ssize_t (*fb_read)(struct fb_info *info, char __user *buf, 257 size_t count, loff_t *ppos); 258 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, 259 size_t count, loff_t *ppos); 260 261 /* checks var and eventually tweaks it to something supported, 262 * DO NOT MODIFY PAR */ 263 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); 264 265 /* set the video mode according to info->var */ 266 int (*fb_set_par)(struct fb_info *info); 267 268 /* set color register */ 269 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, 270 unsigned blue, unsigned transp, struct fb_info *info); 271 272 /* set color registers in batch */ 273 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); 274 275 /* blank display */ 276 int (*fb_blank)(int blank, struct fb_info *info); 277 278 /* pan display */ 279 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); 280 281 /* Draws a rectangle */ 282 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); 283 /* Copy data from area to another */ 284 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); 285 /* Draws a image to the display */ 286 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); 287 288 /* Draws cursor */ 289 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); 290 291 /* wait for blit idle, optional */ 292 int (*fb_sync)(struct fb_info *info); 293 294 /* perform fb specific ioctl (optional) */ 295 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, 296 unsigned long arg); 297 298 /* Handle 32bit compat ioctl (optional) */ 299 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, 300 unsigned long arg); 301 302 /* perform fb specific mmap */ 303 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); 304 305 /* get capability given var */ 306 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, 307 struct fb_var_screeninfo *var); 308 309 /* teardown any resources to do with this framebuffer */ 310 void (*fb_destroy)(struct fb_info *info); 311 312 /* called at KDB enter and leave time to prepare the console */ 313 int (*fb_debug_enter)(struct fb_info *info); 314 int (*fb_debug_leave)(struct fb_info *info); 315 }; 316 317 #ifdef CONFIG_FB_TILEBLITTING 318 #define FB_TILE_CURSOR_NONE 0 319 #define FB_TILE_CURSOR_UNDERLINE 1 320 #define FB_TILE_CURSOR_LOWER_THIRD 2 321 #define FB_TILE_CURSOR_LOWER_HALF 3 322 #define FB_TILE_CURSOR_TWO_THIRDS 4 323 #define FB_TILE_CURSOR_BLOCK 5 324 325 struct fb_tilemap { 326 __u32 width; /* width of each tile in pixels */ 327 __u32 height; /* height of each tile in scanlines */ 328 __u32 depth; /* color depth of each tile */ 329 __u32 length; /* number of tiles in the map */ 330 const __u8 *data; /* actual tile map: a bitmap array, packed 331 to the nearest byte */ 332 }; 333 334 struct fb_tilerect { 335 __u32 sx; /* origin in the x-axis */ 336 __u32 sy; /* origin in the y-axis */ 337 __u32 width; /* number of tiles in the x-axis */ 338 __u32 height; /* number of tiles in the y-axis */ 339 __u32 index; /* what tile to use: index to tile map */ 340 __u32 fg; /* foreground color */ 341 __u32 bg; /* background color */ 342 __u32 rop; /* raster operation */ 343 }; 344 345 struct fb_tilearea { 346 __u32 sx; /* source origin in the x-axis */ 347 __u32 sy; /* source origin in the y-axis */ 348 __u32 dx; /* destination origin in the x-axis */ 349 __u32 dy; /* destination 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 }; 353 354 struct fb_tileblit { 355 __u32 sx; /* origin in the x-axis */ 356 __u32 sy; /* origin in the y-axis */ 357 __u32 width; /* number of tiles in the x-axis */ 358 __u32 height; /* number of tiles in the y-axis */ 359 __u32 fg; /* foreground color */ 360 __u32 bg; /* background color */ 361 __u32 length; /* number of tiles to draw */ 362 __u32 *indices; /* array of indices to tile map */ 363 }; 364 365 struct fb_tilecursor { 366 __u32 sx; /* cursor position in the x-axis */ 367 __u32 sy; /* cursor position in the y-axis */ 368 __u32 mode; /* 0 = erase, 1 = draw */ 369 __u32 shape; /* see FB_TILE_CURSOR_* */ 370 __u32 fg; /* foreground color */ 371 __u32 bg; /* background color */ 372 }; 373 374 struct fb_tile_ops { 375 /* set tile characteristics */ 376 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); 377 378 /* all dimensions from hereon are in terms of tiles */ 379 380 /* move a rectangular region of tiles from one area to another*/ 381 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); 382 /* fill a rectangular region with a tile */ 383 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); 384 /* copy an array of tiles */ 385 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); 386 /* cursor */ 387 void (*fb_tilecursor)(struct fb_info *info, 388 struct fb_tilecursor *cursor); 389 /* get maximum length of the tile map */ 390 int (*fb_get_tilemax)(struct fb_info *info); 391 }; 392 #endif /* CONFIG_FB_TILEBLITTING */ 393 394 /* FBINFO_* = fb_info.flags bit flags */ 395 #define FBINFO_HWACCEL_DISABLED 0x0002 396 /* When FBINFO_HWACCEL_DISABLED is set: 397 * Hardware acceleration is turned off. Software implementations 398 * of required functions (copyarea(), fillrect(), and imageblit()) 399 * takes over; acceleration engine should be in a quiescent state */ 400 401 /* hints */ 402 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ 403 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ 404 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ 405 406 /* hardware supported ops */ 407 /* semantics: when a bit is set, it indicates that the operation is 408 * accelerated by hardware. 409 * required functions will still work even if the bit is not set. 410 * optional functions may not even exist if the flag bit is not set. 411 */ 412 #define FBINFO_HWACCEL_NONE 0x0000 413 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ 414 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ 415 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ 416 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ 417 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ 418 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ 419 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ 420 421 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ 422 423 /* A driver may set this flag to indicate that it does want a set_par to be 424 * called every time when fbcon_switch is executed. The advantage is that with 425 * this flag set you can really be sure that set_par is always called before 426 * any of the functions dependent on the correct hardware state or altering 427 * that state, even if you are using some broken X releases. The disadvantage 428 * is that it introduces unwanted delays to every console switch if set_par 429 * is slow. It is a good idea to try this flag in the drivers initialization 430 * code whenever there is a bug report related to switching between X and the 431 * framebuffer console. 432 */ 433 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 434 435 /* 436 * Host and GPU endianness differ. 437 */ 438 #define FBINFO_FOREIGN_ENDIAN 0x100000 439 /* 440 * Big endian math. This is the same flags as above, but with different 441 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag 442 * and host endianness. Drivers should not use this flag. 443 */ 444 #define FBINFO_BE_MATH 0x100000 445 /* 446 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM 447 * drivers to stop userspace from trying to share buffers behind the kernel's 448 * back. Instead dma-buf based buffer sharing should be used. 449 */ 450 #define FBINFO_HIDE_SMEM_START 0x200000 451 452 453 struct fb_info { 454 refcount_t count; 455 int node; 456 int flags; 457 /* 458 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows 459 * a lcd is not mounted upright and fbcon should rotate to compensate. 460 */ 461 int fbcon_rotate_hint; 462 struct mutex lock; /* Lock for open/release/ioctl funcs */ 463 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */ 464 struct fb_var_screeninfo var; /* Current var */ 465 struct fb_fix_screeninfo fix; /* Current fix */ 466 struct fb_monspecs monspecs; /* Current Monitor specs */ 467 struct fb_pixmap pixmap; /* Image hardware mapper */ 468 struct fb_pixmap sprite; /* Cursor hardware mapper */ 469 struct fb_cmap cmap; /* Current cmap */ 470 struct list_head modelist; /* mode list */ 471 struct fb_videomode *mode; /* current mode */ 472 473 #if IS_ENABLED(CONFIG_FB_BACKLIGHT) 474 /* assigned backlight device */ 475 /* set before framebuffer registration, 476 remove after unregister */ 477 struct backlight_device *bl_dev; 478 479 /* Backlight level curve */ 480 struct mutex bl_curve_mutex; 481 u8 bl_curve[FB_BACKLIGHT_LEVELS]; 482 #endif 483 #ifdef CONFIG_FB_DEFERRED_IO 484 struct delayed_work deferred_work; 485 unsigned long npagerefs; 486 struct fb_deferred_io_pageref *pagerefs; 487 struct fb_deferred_io *fbdefio; 488 #endif 489 490 const struct fb_ops *fbops; 491 struct device *device; /* This is the parent */ 492 #if defined(CONFIG_FB_DEVICE) 493 struct device *dev; /* This is this fb device */ 494 #endif 495 int class_flag; /* private sysfs flags */ 496 #ifdef CONFIG_FB_TILEBLITTING 497 struct fb_tile_ops *tileops; /* Tile Blitting */ 498 #endif 499 union { 500 char __iomem *screen_base; /* Virtual address */ 501 char *screen_buffer; 502 }; 503 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 504 void *pseudo_palette; /* Fake palette of 16 colors */ 505 #define FBINFO_STATE_RUNNING 0 506 #define FBINFO_STATE_SUSPENDED 1 507 u32 state; /* Hardware state i.e suspend */ 508 void *fbcon_par; /* fbcon use-only private area */ 509 /* From here on everything is device dependent */ 510 void *par; 511 512 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 513 bool skip_panic; /* Do not write to the fb after a panic */ 514 }; 515 516 /* This will go away 517 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 518 * when it wants to turn the acceleration engine on. This is 519 * really a separate operation, and should be modified via sysfs. 520 * But for now, we leave it broken with the following define 521 */ 522 #define STUPID_ACCELF_TEXT_SHIT 523 524 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 525 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 526 (val) << (bits)) 527 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 528 (val) >> (bits)) 529 530 /* 531 * `Generic' versions of the frame buffer device operations 532 */ 533 534 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 535 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 536 extern int fb_blank(struct fb_info *info, int blank); 537 538 /* 539 * Helpers for framebuffers in I/O memory 540 */ 541 542 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 543 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 544 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 545 extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, 546 size_t count, loff_t *ppos); 547 extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, 548 size_t count, loff_t *ppos); 549 int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 550 551 #define __FB_DEFAULT_IOMEM_OPS_RDWR \ 552 .fb_read = fb_io_read, \ 553 .fb_write = fb_io_write 554 555 #define __FB_DEFAULT_IOMEM_OPS_DRAW \ 556 .fb_fillrect = cfb_fillrect, \ 557 .fb_copyarea = cfb_copyarea, \ 558 .fb_imageblit = cfb_imageblit 559 560 #define __FB_DEFAULT_IOMEM_OPS_MMAP \ 561 .fb_mmap = fb_io_mmap 562 563 #define FB_DEFAULT_IOMEM_OPS \ 564 __FB_DEFAULT_IOMEM_OPS_RDWR, \ 565 __FB_DEFAULT_IOMEM_OPS_DRAW, \ 566 __FB_DEFAULT_IOMEM_OPS_MMAP 567 568 /* 569 * Helpers for framebuffers in system memory 570 */ 571 572 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 573 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 574 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 575 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 576 size_t count, loff_t *ppos); 577 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 578 size_t count, loff_t *ppos); 579 580 #define __FB_DEFAULT_SYSMEM_OPS_RDWR \ 581 .fb_read = fb_sys_read, \ 582 .fb_write = fb_sys_write 583 584 #define __FB_DEFAULT_SYSMEM_OPS_DRAW \ 585 .fb_fillrect = sys_fillrect, \ 586 .fb_copyarea = sys_copyarea, \ 587 .fb_imageblit = sys_imageblit 588 589 /* 590 * Helpers for framebuffers in DMA-able memory 591 */ 592 593 #define __FB_DEFAULT_DMAMEM_OPS_RDWR \ 594 .fb_read = fb_sys_read, \ 595 .fb_write = fb_sys_write 596 597 #define __FB_DEFAULT_DMAMEM_OPS_DRAW \ 598 .fb_fillrect = sys_fillrect, \ 599 .fb_copyarea = sys_copyarea, \ 600 .fb_imageblit = sys_imageblit 601 602 /* fbmem.c */ 603 extern int register_framebuffer(struct fb_info *fb_info); 604 extern void unregister_framebuffer(struct fb_info *fb_info); 605 extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info); 606 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 607 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 608 u32 height, u32 shift_high, u32 shift_low, u32 mod); 609 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 610 extern void fb_set_suspend(struct fb_info *info, int state); 611 extern int fb_get_color_depth(struct fb_var_screeninfo *var, 612 struct fb_fix_screeninfo *fix); 613 extern int fb_get_options(const char *name, char **option); 614 extern int fb_new_modelist(struct fb_info *info); 615 lock_fb_info(struct fb_info * info)616 static inline void lock_fb_info(struct fb_info *info) 617 { 618 mutex_lock(&info->lock); 619 } 620 unlock_fb_info(struct fb_info * info)621 static inline void unlock_fb_info(struct fb_info *info) 622 { 623 mutex_unlock(&info->lock); 624 } 625 __fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)626 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 627 u8 *src, u32 s_pitch, u32 height) 628 { 629 u32 i, j; 630 631 d_pitch -= s_pitch; 632 633 for (i = height; i--; ) { 634 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 635 for (j = 0; j < s_pitch; j++) 636 *dst++ = *src++; 637 dst += d_pitch; 638 } 639 } 640 641 /* fb_defio.c */ 642 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 643 extern int fb_deferred_io_init(struct fb_info *info); 644 extern void fb_deferred_io_open(struct fb_info *info, 645 struct inode *inode, 646 struct file *file); 647 extern void fb_deferred_io_release(struct fb_info *info); 648 extern void fb_deferred_io_cleanup(struct fb_info *info); 649 extern int fb_deferred_io_fsync(struct file *file, loff_t start, 650 loff_t end, int datasync); 651 652 /* 653 * Generate callbacks for deferred I/O 654 */ 655 656 #define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \ 657 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \ 658 size_t count, loff_t *ppos) \ 659 { \ 660 return fb_ ## __mode ## _read(info, buf, count, ppos); \ 661 } \ 662 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \ 663 size_t count, loff_t *ppos) \ 664 { \ 665 unsigned long offset = *ppos; \ 666 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \ 667 if (ret > 0) \ 668 __damage_range(info, offset, ret); \ 669 return ret; \ 670 } 671 672 #define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \ 673 static void __prefix ## _defio_fillrect(struct fb_info *info, \ 674 const struct fb_fillrect *rect) \ 675 { \ 676 __mode ## _fillrect(info, rect); \ 677 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \ 678 } \ 679 static void __prefix ## _defio_copyarea(struct fb_info *info, \ 680 const struct fb_copyarea *area) \ 681 { \ 682 __mode ## _copyarea(info, area); \ 683 __damage_area(info, area->dx, area->dy, area->width, area->height); \ 684 } \ 685 static void __prefix ## _defio_imageblit(struct fb_info *info, \ 686 const struct fb_image *image) \ 687 { \ 688 __mode ## _imageblit(info, image); \ 689 __damage_area(info, image->dx, image->dy, image->width, image->height); \ 690 } 691 692 #define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \ 693 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \ 694 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb) 695 696 #define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \ 697 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 698 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 699 700 #define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \ 701 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 702 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 703 704 /* 705 * Initializes struct fb_ops for deferred I/O. 706 */ 707 708 #define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \ 709 .fb_read = __prefix ## _defio_read, \ 710 .fb_write = __prefix ## _defio_write 711 712 #define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \ 713 .fb_fillrect = __prefix ## _defio_fillrect, \ 714 .fb_copyarea = __prefix ## _defio_copyarea, \ 715 .fb_imageblit = __prefix ## _defio_imageblit 716 717 #define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \ 718 .fb_mmap = fb_deferred_io_mmap 719 720 #define FB_DEFAULT_DEFERRED_OPS(__prefix) \ 721 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \ 722 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \ 723 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) 724 fb_be_math(struct fb_info * info)725 static inline bool fb_be_math(struct fb_info *info) 726 { 727 #ifdef CONFIG_FB_FOREIGN_ENDIAN 728 #if defined(CONFIG_FB_BOTH_ENDIAN) 729 return info->flags & FBINFO_BE_MATH; 730 #elif defined(CONFIG_FB_BIG_ENDIAN) 731 return true; 732 #elif defined(CONFIG_FB_LITTLE_ENDIAN) 733 return false; 734 #endif /* CONFIG_FB_BOTH_ENDIAN */ 735 #else 736 #ifdef __BIG_ENDIAN 737 return true; 738 #else 739 return false; 740 #endif /* __BIG_ENDIAN */ 741 #endif /* CONFIG_FB_FOREIGN_ENDIAN */ 742 } 743 744 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 745 extern void framebuffer_release(struct fb_info *info); 746 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 747 748 #if IS_ENABLED(CONFIG_FB_BACKLIGHT) 749 struct backlight_device *fb_bl_device(struct fb_info *info); 750 #else fb_bl_device(struct fb_info * info)751 static inline struct backlight_device *fb_bl_device(struct fb_info *info) 752 { 753 return NULL; 754 } 755 #endif 756 757 /* fbmon.c */ 758 #define FB_MAXTIMINGS 0 759 #define FB_VSYNCTIMINGS 1 760 #define FB_HSYNCTIMINGS 2 761 #define FB_DCLKTIMINGS 3 762 #define FB_IGNOREMON 0x100 763 764 #define FB_MODE_IS_UNKNOWN 0 765 #define FB_MODE_IS_DETAILED 1 766 #define FB_MODE_IS_STANDARD 2 767 #define FB_MODE_IS_VESA 4 768 #define FB_MODE_IS_CALCULATED 8 769 #define FB_MODE_IS_FIRST 16 770 #define FB_MODE_IS_FROM_VAR 32 771 772 extern int fbmon_dpms(const struct fb_info *fb_info); 773 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 774 struct fb_info *info); 775 extern int fb_validate_mode(const struct fb_var_screeninfo *var, 776 struct fb_info *info); 777 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 778 extern const unsigned char *fb_firmware_edid(struct device *device); 779 extern void fb_edid_to_monspecs(unsigned char *edid, 780 struct fb_monspecs *specs); 781 extern void fb_destroy_modedb(struct fb_videomode *modedb); 782 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 783 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 784 785 extern int of_get_fb_videomode(struct device_node *np, 786 struct fb_videomode *fb, 787 int index); 788 extern int fb_videomode_from_videomode(const struct videomode *vm, 789 struct fb_videomode *fbmode); 790 791 /* modedb.c */ 792 #define VESA_MODEDB_SIZE 43 793 #define DMT_SIZE 0x50 794 795 extern void fb_var_to_videomode(struct fb_videomode *mode, 796 const struct fb_var_screeninfo *var); 797 extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 798 const struct fb_videomode *mode); 799 extern int fb_mode_is_equal(const struct fb_videomode *mode1, 800 const struct fb_videomode *mode2); 801 extern int fb_add_videomode(const struct fb_videomode *mode, 802 struct list_head *head); 803 extern void fb_delete_videomode(const struct fb_videomode *mode, 804 struct list_head *head); 805 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 806 struct list_head *head); 807 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 808 struct list_head *head); 809 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 810 struct list_head *head); 811 extern void fb_destroy_modelist(struct list_head *head); 812 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 813 struct list_head *head); 814 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 815 struct list_head *head); 816 817 /* fbcmap.c */ 818 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 819 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 820 extern void fb_dealloc_cmap(struct fb_cmap *cmap); 821 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 822 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 823 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 824 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 825 extern const struct fb_cmap *fb_default_cmap(int len); 826 extern void fb_invert_cmaps(void); 827 828 struct fb_videomode { 829 const char *name; /* optional */ 830 u32 refresh; /* optional */ 831 u32 xres; 832 u32 yres; 833 u32 pixclock; 834 u32 left_margin; 835 u32 right_margin; 836 u32 upper_margin; 837 u32 lower_margin; 838 u32 hsync_len; 839 u32 vsync_len; 840 u32 sync; 841 u32 vmode; 842 u32 flag; 843 }; 844 845 struct dmt_videomode { 846 u32 dmt_id; 847 u32 std_2byte_code; 848 u32 cvt_3byte_code; 849 const struct fb_videomode *mode; 850 }; 851 852 extern const struct fb_videomode vesa_modes[]; 853 extern const struct dmt_videomode dmt_modes[]; 854 855 struct fb_modelist { 856 struct list_head list; 857 struct fb_videomode mode; 858 }; 859 860 extern int fb_find_mode(struct fb_var_screeninfo *var, 861 struct fb_info *info, const char *mode_option, 862 const struct fb_videomode *db, 863 unsigned int dbsize, 864 const struct fb_videomode *default_mode, 865 unsigned int default_bpp); 866 867 bool fb_modesetting_disabled(const char *drvname); 868 869 /* 870 * Convenience logging macros 871 */ 872 873 #define fb_err(fb_info, fmt, ...) \ 874 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 875 #define fb_notice(info, fmt, ...) \ 876 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 877 #define fb_warn(fb_info, fmt, ...) \ 878 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 879 #define fb_info(fb_info, fmt, ...) \ 880 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 881 #define fb_dbg(fb_info, fmt, ...) \ 882 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 883 884 #define fb_warn_once(fb_info, fmt, ...) \ 885 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 886 887 #define fb_WARN_ONCE(fb_info, condition, fmt, ...) \ 888 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 889 #define fb_WARN_ON_ONCE(fb_info, x) \ 890 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")") 891 892 #endif /* _LINUX_FB_H */ 893