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 lcd_device; 25 struct module; 26 struct notifier_block; 27 struct page; 28 struct videomode; 29 struct vm_area_struct; 30 31 /* Definitions below are used in the parsed monitor specs */ 32 #define FB_DPMS_ACTIVE_OFF 1 33 #define FB_DPMS_SUSPEND 2 34 #define FB_DPMS_STANDBY 4 35 36 #define FB_DISP_DDI 1 37 #define FB_DISP_ANA_700_300 2 38 #define FB_DISP_ANA_714_286 4 39 #define FB_DISP_ANA_1000_400 8 40 #define FB_DISP_ANA_700_000 16 41 42 #define FB_DISP_MONO 32 43 #define FB_DISP_RGB 64 44 #define FB_DISP_MULTI 128 45 #define FB_DISP_UNKNOWN 256 46 47 #define FB_SIGNAL_NONE 0 48 #define FB_SIGNAL_BLANK_BLANK 1 49 #define FB_SIGNAL_SEPARATE 2 50 #define FB_SIGNAL_COMPOSITE 4 51 #define FB_SIGNAL_SYNC_ON_GREEN 8 52 #define FB_SIGNAL_SERRATION_ON 16 53 54 #define FB_MISC_PRIM_COLOR 1 55 #define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred */ 56 #define FB_MISC_HDMI 4 57 struct fb_chroma { 58 __u32 redx; /* in fraction of 1024 */ 59 __u32 greenx; 60 __u32 bluex; 61 __u32 whitex; 62 __u32 redy; 63 __u32 greeny; 64 __u32 bluey; 65 __u32 whitey; 66 }; 67 68 struct fb_monspecs { 69 struct fb_chroma chroma; 70 struct fb_videomode *modedb; /* mode database */ 71 __u8 manufacturer[4]; /* Manufacturer */ 72 __u8 monitor[14]; /* Monitor String */ 73 __u8 serial_no[14]; /* Serial Number */ 74 __u8 ascii[14]; /* ? */ 75 __u32 modedb_len; /* mode database length */ 76 __u32 model; /* Monitor Model */ 77 __u32 serial; /* Serial Number - Integer */ 78 __u32 year; /* Year manufactured */ 79 __u32 week; /* Week Manufactured */ 80 __u32 hfmin; /* hfreq lower limit (Hz) */ 81 __u32 hfmax; /* hfreq upper limit (Hz) */ 82 __u32 dclkmin; /* pixelclock lower limit (Hz) */ 83 __u32 dclkmax; /* pixelclock upper limit (Hz) */ 84 __u16 input; /* display type - see FB_DISP_* */ 85 __u16 dpms; /* DPMS support - see FB_DPMS_ */ 86 __u16 signal; /* Signal Type - see FB_SIGNAL_* */ 87 __u16 vfmin; /* vfreq lower limit (Hz) */ 88 __u16 vfmax; /* vfreq upper limit (Hz) */ 89 __u16 gamma; /* Gamma - in fractions of 100 */ 90 __u16 gtf : 1; /* supports GTF */ 91 __u16 misc; /* Misc flags - see FB_MISC_* */ 92 __u8 version; /* EDID version... */ 93 __u8 revision; /* ...and revision */ 94 __u8 max_x; /* Maximum horizontal size (cm) */ 95 __u8 max_y; /* Maximum vertical size (cm) */ 96 }; 97 98 struct fb_cmap_user { 99 __u32 start; /* First entry */ 100 __u32 len; /* Number of entries */ 101 __u16 __user *red; /* Red values */ 102 __u16 __user *green; 103 __u16 __user *blue; 104 __u16 __user *transp; /* transparency, can be NULL */ 105 }; 106 107 struct fb_image_user { 108 __u32 dx; /* Where to place image */ 109 __u32 dy; 110 __u32 width; /* Size of image */ 111 __u32 height; 112 __u32 fg_color; /* Only used when a mono bitmap */ 113 __u32 bg_color; 114 __u8 depth; /* Depth of the image */ 115 const char __user *data; /* Pointer to image data */ 116 struct fb_cmap_user cmap; /* color map info */ 117 }; 118 119 struct fb_cursor_user { 120 __u16 set; /* what to set */ 121 __u16 enable; /* cursor on/off */ 122 __u16 rop; /* bitop operation */ 123 const char __user *mask; /* cursor mask bits */ 124 struct fbcurpos hot; /* cursor hot spot */ 125 struct fb_image_user image; /* Cursor image */ 126 }; 127 128 /* 129 * Register/unregister for framebuffer events 130 */ 131 132 #ifdef CONFIG_GUMSTIX_AM200EPD 133 /* only used by mach-pxa/am200epd.c */ 134 #define FB_EVENT_FB_REGISTERED 0x05 135 #define FB_EVENT_FB_UNREGISTERED 0x06 136 #endif 137 138 struct fb_event { 139 struct fb_info *info; 140 void *data; 141 }; 142 143 /* Enough for the VT console needs, see its max_font_width/height */ 144 #define FB_MAX_BLIT_WIDTH 64 145 #define FB_MAX_BLIT_HEIGHT 128 146 147 struct fb_blit_caps { 148 DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH); 149 DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT); 150 u32 len; 151 u32 flags; 152 }; 153 154 #ifdef CONFIG_FB_NOTIFY 155 extern int fb_register_client(struct notifier_block *nb); 156 extern int fb_unregister_client(struct notifier_block *nb); 157 extern int fb_notifier_call_chain(unsigned long val, void *v); 158 #else 159 static inline int fb_register_client(struct notifier_block *nb) 160 { 161 return 0; 162 }; 163 164 static inline int fb_unregister_client(struct notifier_block *nb) 165 { 166 return 0; 167 }; 168 169 static inline int fb_notifier_call_chain(unsigned long val, void *v) 170 { 171 return 0; 172 }; 173 #endif 174 175 /* 176 * Pixmap structure definition 177 * 178 * The purpose of this structure is to translate data 179 * from the hardware independent format of fbdev to what 180 * format the hardware needs. 181 */ 182 183 #define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon */ 184 #define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM */ 185 #define FB_PIXMAP_IO 4 /* memory is iomapped */ 186 #define FB_PIXMAP_SYNC 256 /* set if GPU can DMA */ 187 188 struct fb_pixmap { 189 u8 *addr; /* pointer to memory */ 190 u32 size; /* size of buffer in bytes */ 191 u32 offset; /* current offset to buffer */ 192 u32 buf_align; /* byte alignment of each bitmap */ 193 u32 scan_align; /* alignment per scanline */ 194 u32 access_align; /* alignment per read/write (bits) */ 195 u32 flags; /* see FB_PIXMAP_* */ 196 /* supported bit block dimensions */ 197 /* Format: test_bit(width - 1, blit_x) */ 198 /* test_bit(height - 1, blit_y) */ 199 /* if zero, will be set to full (all) */ 200 DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH); 201 DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT); 202 /* access methods */ 203 void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); 204 void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size); 205 }; 206 207 #ifdef CONFIG_FB_DEFERRED_IO 208 struct fb_deferred_io_pageref { 209 struct page *page; 210 unsigned long offset; 211 /* private */ 212 struct list_head list; 213 }; 214 215 struct fb_deferred_io { 216 /* delay between mkwrite and deferred handler */ 217 unsigned long delay; 218 bool sort_pagereflist; /* sort pagelist by offset */ 219 int open_count; /* number of opened files; protected by fb_info lock */ 220 struct mutex lock; /* mutex that protects the pageref list */ 221 struct list_head pagereflist; /* list of pagerefs for touched pages */ 222 struct address_space *mapping; /* page cache object for fb device */ 223 /* callback */ 224 struct page *(*get_page)(struct fb_info *info, unsigned long offset); 225 void (*deferred_io)(struct fb_info *info, struct list_head *pagelist); 226 }; 227 #endif 228 229 /* 230 * Frame buffer operations 231 * 232 * LOCKING NOTE: those functions must _ALL_ be called with the console 233 * semaphore held, this is the only suitable locking mechanism we have 234 * in 2.6. Some may be called at interrupt time at this point though. 235 * 236 * The exception to this is the debug related hooks. Putting the fb 237 * into a debug state (e.g. flipping to the kernel console) and restoring 238 * it must be done in a lock-free manner, so low level drivers should 239 * keep track of the initial console (if applicable) and may need to 240 * perform direct, unlocked hardware writes in these hooks. 241 */ 242 243 struct fb_ops { 244 /* open/release and usage marking */ 245 struct module *owner; 246 int (*fb_open)(struct fb_info *info, int user); 247 int (*fb_release)(struct fb_info *info, int user); 248 249 /* For framebuffers with strange non linear layouts or that do not 250 * work with normal memory mapped access 251 */ 252 ssize_t (*fb_read)(struct fb_info *info, char __user *buf, 253 size_t count, loff_t *ppos); 254 ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, 255 size_t count, loff_t *ppos); 256 257 /* checks var and eventually tweaks it to something supported, 258 * DO NOT MODIFY PAR */ 259 int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); 260 261 /* set the video mode according to info->var */ 262 int (*fb_set_par)(struct fb_info *info); 263 264 /* set color register */ 265 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, 266 unsigned blue, unsigned transp, struct fb_info *info); 267 268 /* set color registers in batch */ 269 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); 270 271 /* blank display */ 272 int (*fb_blank)(int blank, struct fb_info *info); 273 274 /* pan display */ 275 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); 276 277 /* Draws a rectangle */ 278 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); 279 /* Copy data from area to another */ 280 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); 281 /* Draws a image to the display */ 282 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); 283 284 /* Draws cursor */ 285 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); 286 287 /* wait for blit idle, optional */ 288 int (*fb_sync)(struct fb_info *info); 289 290 /* perform fb specific ioctl (optional) */ 291 int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, 292 unsigned long arg); 293 294 /* Handle 32bit compat ioctl (optional) */ 295 int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, 296 unsigned long arg); 297 298 /* perform fb specific mmap */ 299 int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); 300 301 /* get capability given var */ 302 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, 303 struct fb_var_screeninfo *var); 304 305 /* teardown any resources to do with this framebuffer */ 306 void (*fb_destroy)(struct fb_info *info); 307 }; 308 309 #ifdef CONFIG_FB_TILEBLITTING 310 #define FB_TILE_CURSOR_NONE 0 311 #define FB_TILE_CURSOR_UNDERLINE 1 312 #define FB_TILE_CURSOR_LOWER_THIRD 2 313 #define FB_TILE_CURSOR_LOWER_HALF 3 314 #define FB_TILE_CURSOR_TWO_THIRDS 4 315 #define FB_TILE_CURSOR_BLOCK 5 316 317 struct fb_tilemap { 318 __u32 width; /* width of each tile in pixels */ 319 __u32 height; /* height of each tile in scanlines */ 320 __u32 depth; /* color depth of each tile */ 321 __u32 length; /* number of tiles in the map */ 322 const __u8 *data; /* actual tile map: a bitmap array, packed 323 to the nearest byte */ 324 }; 325 326 struct fb_tilerect { 327 __u32 sx; /* origin in the x-axis */ 328 __u32 sy; /* origin in the y-axis */ 329 __u32 width; /* number of tiles in the x-axis */ 330 __u32 height; /* number of tiles in the y-axis */ 331 __u32 index; /* what tile to use: index to tile map */ 332 __u32 fg; /* foreground color */ 333 __u32 bg; /* background color */ 334 __u32 rop; /* raster operation */ 335 }; 336 337 struct fb_tilearea { 338 __u32 sx; /* source origin in the x-axis */ 339 __u32 sy; /* source origin in the y-axis */ 340 __u32 dx; /* destination origin in the x-axis */ 341 __u32 dy; /* destination origin in the y-axis */ 342 __u32 width; /* number of tiles in the x-axis */ 343 __u32 height; /* number of tiles in the y-axis */ 344 }; 345 346 struct fb_tileblit { 347 __u32 sx; /* origin in the x-axis */ 348 __u32 sy; /* origin in the y-axis */ 349 __u32 width; /* number of tiles in the x-axis */ 350 __u32 height; /* number of tiles in the y-axis */ 351 __u32 fg; /* foreground color */ 352 __u32 bg; /* background color */ 353 __u32 length; /* number of tiles to draw */ 354 __u32 *indices; /* array of indices to tile map */ 355 }; 356 357 struct fb_tilecursor { 358 __u32 sx; /* cursor position in the x-axis */ 359 __u32 sy; /* cursor position in the y-axis */ 360 __u32 mode; /* 0 = erase, 1 = draw */ 361 __u32 shape; /* see FB_TILE_CURSOR_* */ 362 __u32 fg; /* foreground color */ 363 __u32 bg; /* background color */ 364 }; 365 366 struct fb_tile_ops { 367 /* set tile characteristics */ 368 void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); 369 370 /* all dimensions from hereon are in terms of tiles */ 371 372 /* move a rectangular region of tiles from one area to another*/ 373 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); 374 /* fill a rectangular region with a tile */ 375 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); 376 /* copy an array of tiles */ 377 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); 378 /* cursor */ 379 void (*fb_tilecursor)(struct fb_info *info, 380 struct fb_tilecursor *cursor); 381 /* get maximum length of the tile map */ 382 int (*fb_get_tilemax)(struct fb_info *info); 383 }; 384 #endif /* CONFIG_FB_TILEBLITTING */ 385 386 /* FBINFO_* = fb_info.flags bit flags */ 387 #define FBINFO_HWACCEL_DISABLED 0x0002 388 /* When FBINFO_HWACCEL_DISABLED is set: 389 * Hardware acceleration is turned off. Software implementations 390 * of required functions (copyarea(), fillrect(), and imageblit()) 391 * takes over; acceleration engine should be in a quiescent state */ 392 393 /* hints */ 394 #define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. */ 395 #define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */ 396 #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ 397 398 /* hardware supported ops */ 399 /* semantics: when a bit is set, it indicates that the operation is 400 * accelerated by hardware. 401 * required functions will still work even if the bit is not set. 402 * optional functions may not even exist if the flag bit is not set. 403 */ 404 #define FBINFO_HWACCEL_NONE 0x0000 405 #define FBINFO_HWACCEL_COPYAREA 0x0100 /* required */ 406 #define FBINFO_HWACCEL_FILLRECT 0x0200 /* required */ 407 #define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required */ 408 #define FBINFO_HWACCEL_ROTATE 0x0800 /* optional */ 409 #define FBINFO_HWACCEL_XPAN 0x1000 /* optional */ 410 #define FBINFO_HWACCEL_YPAN 0x2000 /* optional */ 411 #define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */ 412 413 #define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting */ 414 415 /* A driver may set this flag to indicate that it does want a set_par to be 416 * called every time when fbcon_switch is executed. The advantage is that with 417 * this flag set you can really be sure that set_par is always called before 418 * any of the functions dependent on the correct hardware state or altering 419 * that state, even if you are using some broken X releases. The disadvantage 420 * is that it introduces unwanted delays to every console switch if set_par 421 * is slow. It is a good idea to try this flag in the drivers initialization 422 * code whenever there is a bug report related to switching between X and the 423 * framebuffer console. 424 */ 425 #define FBINFO_MISC_ALWAYS_SETPAR 0x40000 426 427 /* 428 * Host and GPU endianness differ. 429 */ 430 #define FBINFO_FOREIGN_ENDIAN 0x100000 431 /* 432 * Big endian math. This is the same flags as above, but with different 433 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag 434 * and host endianness. Drivers should not use this flag. 435 */ 436 #define FBINFO_BE_MATH 0x100000 437 /* 438 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM 439 * drivers to stop userspace from trying to share buffers behind the kernel's 440 * back. Instead dma-buf based buffer sharing should be used. 441 */ 442 #define FBINFO_HIDE_SMEM_START 0x200000 443 444 445 struct fb_info { 446 refcount_t count; 447 int node; 448 int flags; 449 /* 450 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows 451 * a lcd is not mounted upright and fbcon should rotate to compensate. 452 */ 453 int fbcon_rotate_hint; 454 struct mutex lock; /* Lock for open/release/ioctl funcs */ 455 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */ 456 struct fb_var_screeninfo var; /* Current var */ 457 struct fb_fix_screeninfo fix; /* Current fix */ 458 struct fb_monspecs monspecs; /* Current Monitor specs */ 459 struct fb_pixmap pixmap; /* Image hardware mapper */ 460 struct fb_pixmap sprite; /* Cursor hardware mapper */ 461 struct fb_cmap cmap; /* Current cmap */ 462 struct list_head modelist; /* mode list */ 463 struct fb_videomode *mode; /* current mode */ 464 465 int blank; /* current blanking; see FB_BLANK_ constants */ 466 467 #if IS_ENABLED(CONFIG_FB_BACKLIGHT) 468 /* assigned backlight device */ 469 /* set before framebuffer registration, 470 remove after unregister */ 471 struct backlight_device *bl_dev; 472 473 /* Backlight level curve */ 474 struct mutex bl_curve_mutex; 475 u8 bl_curve[FB_BACKLIGHT_LEVELS]; 476 #endif 477 478 /* 479 * Assigned LCD device; set before framebuffer 480 * registration, remove after unregister 481 */ 482 struct lcd_device *lcd_dev; 483 484 #ifdef CONFIG_FB_DEFERRED_IO 485 struct delayed_work deferred_work; 486 unsigned long npagerefs; 487 struct fb_deferred_io_pageref *pagerefs; 488 struct fb_deferred_io *fbdefio; 489 #endif 490 491 const struct fb_ops *fbops; 492 struct device *device; /* This is the parent */ 493 #if defined(CONFIG_FB_DEVICE) 494 struct device *dev; /* This is this fb device */ 495 #endif 496 int class_flag; /* private sysfs flags */ 497 #ifdef CONFIG_FB_TILEBLITTING 498 struct fb_tile_ops *tileops; /* Tile Blitting */ 499 #endif 500 union { 501 char __iomem *screen_base; /* Virtual address */ 502 char *screen_buffer; 503 }; 504 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */ 505 void *pseudo_palette; /* Fake palette of 16 colors */ 506 #define FBINFO_STATE_RUNNING 0 507 #define FBINFO_STATE_SUSPENDED 1 508 u32 state; /* Hardware state i.e suspend */ 509 void *fbcon_par; /* fbcon use-only private area */ 510 /* From here on everything is device dependent */ 511 void *par; 512 513 bool skip_vt_switch; /* no VT switch on suspend/resume required */ 514 bool skip_panic; /* Do not write to the fb after a panic */ 515 }; 516 517 /* This will go away 518 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags 519 * when it wants to turn the acceleration engine on. This is 520 * really a separate operation, and should be modified via sysfs. 521 * But for now, we leave it broken with the following define 522 */ 523 #define STUPID_ACCELF_TEXT_SHIT 524 525 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0) 526 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ 527 (val) << (bits)) 528 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ 529 (val) >> (bits)) 530 531 /* 532 * `Generic' versions of the frame buffer device operations 533 */ 534 535 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 536 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 537 extern int fb_blank(struct fb_info *info, int blank); 538 539 /* 540 * Helpers for framebuffers in I/O memory 541 */ 542 543 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 544 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 545 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image); 546 extern ssize_t fb_io_read(struct fb_info *info, char __user *buf, 547 size_t count, loff_t *ppos); 548 extern ssize_t fb_io_write(struct fb_info *info, const char __user *buf, 549 size_t count, loff_t *ppos); 550 int fb_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 551 552 #define __FB_DEFAULT_IOMEM_OPS_RDWR \ 553 .fb_read = fb_io_read, \ 554 .fb_write = fb_io_write 555 556 #define __FB_DEFAULT_IOMEM_OPS_DRAW \ 557 .fb_fillrect = cfb_fillrect, \ 558 .fb_copyarea = cfb_copyarea, \ 559 .fb_imageblit = cfb_imageblit 560 561 #define __FB_DEFAULT_IOMEM_OPS_MMAP \ 562 .fb_mmap = fb_io_mmap 563 564 #define FB_DEFAULT_IOMEM_OPS \ 565 __FB_DEFAULT_IOMEM_OPS_RDWR, \ 566 __FB_DEFAULT_IOMEM_OPS_DRAW, \ 567 __FB_DEFAULT_IOMEM_OPS_MMAP 568 569 /* 570 * Helpers for framebuffers in system memory 571 */ 572 573 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 574 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area); 575 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image); 576 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, 577 size_t count, loff_t *ppos); 578 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, 579 size_t count, loff_t *ppos); 580 581 #define __FB_DEFAULT_SYSMEM_OPS_RDWR \ 582 .fb_read = fb_sys_read, \ 583 .fb_write = fb_sys_write 584 585 #define __FB_DEFAULT_SYSMEM_OPS_DRAW \ 586 .fb_fillrect = sys_fillrect, \ 587 .fb_copyarea = sys_copyarea, \ 588 .fb_imageblit = sys_imageblit 589 590 /* 591 * Helpers for framebuffers in DMA-able memory 592 */ 593 594 #define __FB_DEFAULT_DMAMEM_OPS_RDWR \ 595 .fb_read = fb_sys_read, \ 596 .fb_write = fb_sys_write 597 598 #define __FB_DEFAULT_DMAMEM_OPS_DRAW \ 599 .fb_fillrect = sys_fillrect, \ 600 .fb_copyarea = sys_copyarea, \ 601 .fb_imageblit = sys_imageblit 602 603 /* fbmem.c */ 604 extern int register_framebuffer(struct fb_info *fb_info); 605 extern void unregister_framebuffer(struct fb_info *fb_info); 606 extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info); 607 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size); 608 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, 609 u32 height, u32 shift_high, u32 shift_low, u32 mod); 610 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height); 611 extern void fb_set_suspend(struct fb_info *info, int state); 612 extern int fb_get_color_depth(struct fb_var_screeninfo *var, 613 struct fb_fix_screeninfo *fix); 614 extern int fb_get_options(const char *name, char **option); 615 extern int fb_new_modelist(struct fb_info *info); 616 617 static inline void lock_fb_info(struct fb_info *info) 618 { 619 mutex_lock(&info->lock); 620 } 621 622 static inline void unlock_fb_info(struct fb_info *info) 623 { 624 mutex_unlock(&info->lock); 625 } 626 627 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, 628 u8 *src, u32 s_pitch, u32 height) 629 { 630 u32 i, j; 631 632 d_pitch -= s_pitch; 633 634 for (i = height; i--; ) { 635 /* s_pitch is a few bytes at the most, memcpy is suboptimal */ 636 for (j = 0; j < s_pitch; j++) 637 *dst++ = *src++; 638 dst += d_pitch; 639 } 640 } 641 642 /* fb_defio.c */ 643 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 644 extern int fb_deferred_io_init(struct fb_info *info); 645 extern void fb_deferred_io_open(struct fb_info *info, 646 struct inode *inode, 647 struct file *file); 648 extern void fb_deferred_io_release(struct fb_info *info); 649 extern void fb_deferred_io_cleanup(struct fb_info *info); 650 extern int fb_deferred_io_fsync(struct file *file, loff_t start, 651 loff_t end, int datasync); 652 653 /* 654 * Generate callbacks for deferred I/O 655 */ 656 657 #define __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, __mode) \ 658 static ssize_t __prefix ## _defio_read(struct fb_info *info, char __user *buf, \ 659 size_t count, loff_t *ppos) \ 660 { \ 661 return fb_ ## __mode ## _read(info, buf, count, ppos); \ 662 } \ 663 static ssize_t __prefix ## _defio_write(struct fb_info *info, const char __user *buf, \ 664 size_t count, loff_t *ppos) \ 665 { \ 666 unsigned long offset = *ppos; \ 667 ssize_t ret = fb_ ## __mode ## _write(info, buf, count, ppos); \ 668 if (ret > 0) \ 669 __damage_range(info, offset, ret); \ 670 return ret; \ 671 } 672 673 #define __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, __mode) \ 674 static void __prefix ## _defio_fillrect(struct fb_info *info, \ 675 const struct fb_fillrect *rect) \ 676 { \ 677 __mode ## _fillrect(info, rect); \ 678 __damage_area(info, rect->dx, rect->dy, rect->width, rect->height); \ 679 } \ 680 static void __prefix ## _defio_copyarea(struct fb_info *info, \ 681 const struct fb_copyarea *area) \ 682 { \ 683 __mode ## _copyarea(info, area); \ 684 __damage_area(info, area->dx, area->dy, area->width, area->height); \ 685 } \ 686 static void __prefix ## _defio_imageblit(struct fb_info *info, \ 687 const struct fb_image *image) \ 688 { \ 689 __mode ## _imageblit(info, image); \ 690 __damage_area(info, image->dx, image->dy, image->width, image->height); \ 691 } 692 693 #define FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(__prefix, __damage_range, __damage_area) \ 694 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, io) \ 695 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, cfb) 696 697 #define FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(__prefix, __damage_range, __damage_area) \ 698 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 699 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 700 701 #define FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(__prefix, __damage_range, __damage_area) \ 702 __FB_GEN_DEFAULT_DEFERRED_OPS_RDWR(__prefix, __damage_range, sys) \ 703 __FB_GEN_DEFAULT_DEFERRED_OPS_DRAW(__prefix, __damage_area, sys) 704 705 /* 706 * Initializes struct fb_ops for deferred I/O. 707 */ 708 709 #define __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix) \ 710 .fb_read = __prefix ## _defio_read, \ 711 .fb_write = __prefix ## _defio_write 712 713 #define __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix) \ 714 .fb_fillrect = __prefix ## _defio_fillrect, \ 715 .fb_copyarea = __prefix ## _defio_copyarea, \ 716 .fb_imageblit = __prefix ## _defio_imageblit 717 718 #define __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) \ 719 .fb_mmap = fb_deferred_io_mmap 720 721 #define FB_DEFAULT_DEFERRED_OPS(__prefix) \ 722 __FB_DEFAULT_DEFERRED_OPS_RDWR(__prefix), \ 723 __FB_DEFAULT_DEFERRED_OPS_DRAW(__prefix), \ 724 __FB_DEFAULT_DEFERRED_OPS_MMAP(__prefix) 725 726 static inline bool fb_be_math(struct fb_info *info) 727 { 728 #ifdef CONFIG_FB_FOREIGN_ENDIAN 729 #if defined(CONFIG_FB_BOTH_ENDIAN) 730 return info->flags & FBINFO_BE_MATH; 731 #elif defined(CONFIG_FB_BIG_ENDIAN) 732 return true; 733 #elif defined(CONFIG_FB_LITTLE_ENDIAN) 734 return false; 735 #endif /* CONFIG_FB_BOTH_ENDIAN */ 736 #else 737 #ifdef __BIG_ENDIAN 738 return true; 739 #else 740 return false; 741 #endif /* __BIG_ENDIAN */ 742 #endif /* CONFIG_FB_FOREIGN_ENDIAN */ 743 } 744 745 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); 746 extern void framebuffer_release(struct fb_info *info); 747 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max); 748 749 #if IS_ENABLED(CONFIG_FB_BACKLIGHT) 750 struct backlight_device *fb_bl_device(struct fb_info *info); 751 void fb_bl_notify_blank(struct fb_info *info, int old_blank); 752 #else 753 static inline struct backlight_device *fb_bl_device(struct fb_info *info) 754 { 755 return NULL; 756 } 757 758 static inline void fb_bl_notify_blank(struct fb_info *info, int old_blank) 759 { } 760 #endif 761 762 static inline struct lcd_device *fb_lcd_device(struct fb_info *info) 763 { 764 return info->lcd_dev; 765 } 766 767 /* fbmon.c */ 768 #define FB_MAXTIMINGS 0 769 #define FB_VSYNCTIMINGS 1 770 #define FB_HSYNCTIMINGS 2 771 #define FB_DCLKTIMINGS 3 772 #define FB_IGNOREMON 0x100 773 774 #define FB_MODE_IS_UNKNOWN 0 775 #define FB_MODE_IS_DETAILED 1 776 #define FB_MODE_IS_STANDARD 2 777 #define FB_MODE_IS_VESA 4 778 #define FB_MODE_IS_CALCULATED 8 779 #define FB_MODE_IS_FIRST 16 780 #define FB_MODE_IS_FROM_VAR 32 781 782 extern int fbmon_dpms(const struct fb_info *fb_info); 783 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, 784 struct fb_info *info); 785 extern int fb_validate_mode(const struct fb_var_screeninfo *var, 786 struct fb_info *info); 787 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); 788 extern const unsigned char *fb_firmware_edid(struct device *device); 789 extern void fb_edid_to_monspecs(unsigned char *edid, 790 struct fb_monspecs *specs); 791 extern void fb_destroy_modedb(struct fb_videomode *modedb); 792 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb); 793 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter); 794 795 extern int of_get_fb_videomode(struct device_node *np, 796 struct fb_videomode *fb, 797 int index); 798 extern int fb_videomode_from_videomode(const struct videomode *vm, 799 struct fb_videomode *fbmode); 800 801 /* modedb.c */ 802 #define VESA_MODEDB_SIZE 43 803 #define DMT_SIZE 0x50 804 805 extern void fb_var_to_videomode(struct fb_videomode *mode, 806 const struct fb_var_screeninfo *var); 807 extern void fb_videomode_to_var(struct fb_var_screeninfo *var, 808 const struct fb_videomode *mode); 809 extern int fb_mode_is_equal(const struct fb_videomode *mode1, 810 const struct fb_videomode *mode2); 811 extern int fb_add_videomode(const struct fb_videomode *mode, 812 struct list_head *head); 813 extern void fb_delete_videomode(const struct fb_videomode *mode, 814 struct list_head *head); 815 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, 816 struct list_head *head); 817 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, 818 struct list_head *head); 819 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, 820 struct list_head *head); 821 extern void fb_destroy_modelist(struct list_head *head); 822 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, 823 struct list_head *head); 824 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, 825 struct list_head *head); 826 827 /* fbcmap.c */ 828 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp); 829 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags); 830 extern void fb_dealloc_cmap(struct fb_cmap *cmap); 831 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to); 832 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to); 833 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info); 834 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info); 835 extern const struct fb_cmap *fb_default_cmap(int len); 836 extern void fb_invert_cmaps(void); 837 838 struct fb_videomode { 839 const char *name; /* optional */ 840 u32 refresh; /* optional */ 841 u32 xres; 842 u32 yres; 843 u32 pixclock; 844 u32 left_margin; 845 u32 right_margin; 846 u32 upper_margin; 847 u32 lower_margin; 848 u32 hsync_len; 849 u32 vsync_len; 850 u32 sync; 851 u32 vmode; 852 u32 flag; 853 }; 854 855 struct dmt_videomode { 856 u32 dmt_id; 857 u32 std_2byte_code; 858 u32 cvt_3byte_code; 859 const struct fb_videomode *mode; 860 }; 861 862 extern const struct fb_videomode vesa_modes[]; 863 extern const struct dmt_videomode dmt_modes[]; 864 865 struct fb_modelist { 866 struct list_head list; 867 struct fb_videomode mode; 868 }; 869 870 extern int fb_find_mode(struct fb_var_screeninfo *var, 871 struct fb_info *info, const char *mode_option, 872 const struct fb_videomode *db, 873 unsigned int dbsize, 874 const struct fb_videomode *default_mode, 875 unsigned int default_bpp); 876 877 bool fb_modesetting_disabled(const char *drvname); 878 879 /* 880 * Convenience logging macros 881 */ 882 883 #define fb_err(fb_info, fmt, ...) \ 884 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 885 #define fb_notice(info, fmt, ...) \ 886 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 887 #define fb_warn(fb_info, fmt, ...) \ 888 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 889 #define fb_info(fb_info, fmt, ...) \ 890 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 891 #define fb_dbg(fb_info, fmt, ...) \ 892 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 893 894 #define fb_warn_once(fb_info, fmt, ...) \ 895 pr_warn_once("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 896 897 #define fb_WARN_ONCE(fb_info, condition, fmt, ...) \ 898 WARN_ONCE(condition, "fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) 899 #define fb_WARN_ON_ONCE(fb_info, x) \ 900 fb_WARN_ONCE(fb_info, (x), "%s", "fb_WARN_ON_ONCE(" __stringify(x) ")") 901 902 #endif /* _LINUX_FB_H */ 903