genfb.c revision 1.34
1 /* $NetBSD: genfb.c,v 1.34 2011/02/08 10:52:56 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.34 2011/02/08 10:52:56 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/proc.h> 37 #include <sys/mutex.h> 38 #include <sys/ioctl.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/kmem.h> 42 43 #include <dev/wscons/wsconsio.h> 44 #include <dev/wscons/wsdisplayvar.h> 45 #include <dev/rasops/rasops.h> 46 #include <dev/wsfont/wsfont.h> 47 48 #include <dev/wscons/wsdisplay_vconsvar.h> 49 50 #include <dev/wsfb/genfbvar.h> 51 52 #ifdef GENFB_DISABLE_TEXT 53 #include <sys/reboot.h> 54 #define DISABLESPLASH (boothowto & (RB_SINGLE | RB_USERCONF | RB_ASKNAME | \ 55 AB_VERBOSE | AB_DEBUG) ) 56 #endif 57 58 #include "opt_genfb.h" 59 #include "opt_wsfb.h" 60 61 #ifdef GENFB_DEBUG 62 #define GPRINTF panic 63 #else 64 #define GPRINTF aprint_verbose 65 #endif 66 67 static int genfb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 68 static paddr_t genfb_mmap(void *, void *, off_t, int); 69 static void genfb_init_screen(void *, struct vcons_screen *, int, long *); 70 71 static int genfb_putcmap(struct genfb_softc *, struct wsdisplay_cmap *); 72 static int genfb_getcmap(struct genfb_softc *, struct wsdisplay_cmap *); 73 static int genfb_putpalreg(struct genfb_softc *, uint8_t, uint8_t, 74 uint8_t, uint8_t); 75 76 static void genfb_brightness_up(device_t); 77 static void genfb_brightness_down(device_t); 78 /* set backlight level */ 79 static void genfb_set_backlight(struct genfb_softc *, int); 80 /* turn backlight on and off without messing with the level */ 81 static void genfb_switch_backlight(struct genfb_softc *, int); 82 83 extern const u_char rasops_cmap[768]; 84 85 static int genfb_cnattach_called = 0; 86 static int genfb_enabled = 1; 87 88 struct wsdisplay_accessops genfb_accessops = { 89 genfb_ioctl, 90 genfb_mmap, 91 NULL, /* alloc_screen */ 92 NULL, /* free_screen */ 93 NULL, /* show_screen */ 94 NULL, /* load_font */ 95 NULL, /* pollc */ 96 NULL /* scroll */ 97 }; 98 99 static struct genfb_softc *genfb_softc = NULL; 100 101 void 102 genfb_init(struct genfb_softc *sc) 103 { 104 prop_dictionary_t dict; 105 uint64_t cmap_cb, pmf_cb, mode_cb, bl_cb; 106 uint32_t fboffset; 107 bool console; 108 109 dict = device_properties(sc->sc_dev); 110 #ifdef GENFB_DEBUG 111 printf(prop_dictionary_externalize(dict)); 112 #endif 113 prop_dictionary_get_bool(dict, "is_console", &console); 114 115 if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) { 116 GPRINTF("no width property\n"); 117 return; 118 } 119 if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) { 120 GPRINTF("no height property\n"); 121 return; 122 } 123 if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) { 124 GPRINTF("no depth property\n"); 125 return; 126 } 127 128 /* XXX should be a 64bit value */ 129 if (!prop_dictionary_get_uint32(dict, "address", &fboffset)) { 130 GPRINTF("no address property\n"); 131 return; 132 } 133 134 sc->sc_fboffset = fboffset; 135 136 if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) 137 sc->sc_stride = (sc->sc_width * sc->sc_depth) >> 3; 138 139 /* 140 * deal with a bug in the Raptor firmware which always sets 141 * stride = width even when depth != 8 142 */ 143 if (sc->sc_stride < sc->sc_width * (sc->sc_depth >> 3)) 144 sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3); 145 146 sc->sc_fbsize = sc->sc_height * sc->sc_stride; 147 148 /* optional colour map callback */ 149 sc->sc_cmcb = NULL; 150 if (prop_dictionary_get_uint64(dict, "cmap_callback", &cmap_cb)) { 151 if (cmap_cb != 0) 152 sc->sc_cmcb = (void *)(vaddr_t)cmap_cb; 153 } 154 155 /* optional pmf callback */ 156 sc->sc_pmfcb = NULL; 157 if (prop_dictionary_get_uint64(dict, "pmf_callback", &pmf_cb)) { 158 if (pmf_cb != 0) 159 sc->sc_pmfcb = (void *)(vaddr_t)pmf_cb; 160 } 161 162 /* optional mode callback */ 163 sc->sc_modecb = NULL; 164 if (prop_dictionary_get_uint64(dict, "mode_callback", &mode_cb)) { 165 if (mode_cb != 0) 166 sc->sc_modecb = (void *)(vaddr_t)mode_cb; 167 } 168 169 /* optional backlight control callback */ 170 sc->sc_backlight = NULL; 171 if (prop_dictionary_get_uint64(dict, "backlight_callback", &bl_cb)) { 172 if (bl_cb != 0) { 173 sc->sc_backlight = (void *)(vaddr_t)bl_cb; 174 sc->sc_backlight_on = 1; 175 aprint_naive_dev(sc->sc_dev, 176 "enabling backlight control\n"); 177 sc->sc_backlight_level = 178 sc->sc_backlight->gpc_get_parameter( 179 sc->sc_backlight->gpc_cookie); 180 if (console) { 181 pmf_event_register(sc->sc_dev, 182 PMFE_DISPLAY_BRIGHTNESS_UP, 183 genfb_brightness_up, TRUE); 184 pmf_event_register(sc->sc_dev, 185 PMFE_DISPLAY_BRIGHTNESS_DOWN, 186 genfb_brightness_down, TRUE); 187 } 188 } 189 } 190 } 191 192 int 193 genfb_attach(struct genfb_softc *sc, struct genfb_ops *ops) 194 { 195 struct wsemuldisplaydev_attach_args aa; 196 prop_dictionary_t dict; 197 struct rasops_info *ri; 198 uint16_t crow; 199 long defattr; 200 int i, j; 201 bool console; 202 #ifdef SPLASHSCREEN 203 int error = ENXIO; 204 #endif 205 206 dict = device_properties(sc->sc_dev); 207 prop_dictionary_get_bool(dict, "is_console", &console); 208 209 if (prop_dictionary_get_uint16(dict, "cursor-row", &crow) == false) 210 crow = 0; 211 if (prop_dictionary_get_bool(dict, "clear-screen", &sc->sc_want_clear) 212 == false) 213 sc->sc_want_clear = true; 214 215 /* do not attach when we're not console */ 216 if (!console) { 217 aprint_normal_dev(sc->sc_dev, "no console, unable to continue\n"); 218 return -1; 219 } 220 221 aprint_verbose_dev(sc->sc_dev, "framebuffer at %p, size %dx%d, depth %d, " 222 "stride %d\n", 223 sc->sc_fboffset ? (void *)(intptr_t)sc->sc_fboffset : sc->sc_fbaddr, 224 sc->sc_width, sc->sc_height, sc->sc_depth, sc->sc_stride); 225 226 sc->sc_defaultscreen_descr = (struct wsscreen_descr){ 227 "default", 228 0, 0, 229 NULL, 230 8, 16, 231 WSSCREEN_WSCOLORS | WSSCREEN_HILIT, 232 NULL 233 }; 234 sc->sc_screens[0] = &sc->sc_defaultscreen_descr; 235 sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens}; 236 memcpy(&sc->sc_ops, ops, sizeof(struct genfb_ops)); 237 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 238 if (sc->sc_modecb->gmc_setmode) 239 sc->sc_modecb->gmc_setmode(sc, sc->sc_mode); 240 241 #ifdef GENFB_SHADOWFB 242 sc->sc_shadowfb = kmem_alloc(sc->sc_fbsize, KM_SLEEP); 243 if (sc->sc_want_clear == false && sc->sc_shadowfb != NULL) 244 memcpy(sc->sc_shadowfb, sc->sc_fbaddr, sc->sc_fbsize); 245 #endif 246 247 vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, 248 &genfb_accessops); 249 sc->vd.init_screen = genfb_init_screen; 250 251 /* Do not print anything between this point and the screen 252 * clear operation below. Otherwise it will be lost. */ 253 254 ri = &sc->sc_console_screen.scr_ri; 255 256 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1, 257 &defattr); 258 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 259 260 #ifdef SPLASHSCREEN 261 /* 262 * If system isn't going to go multiuser, or user has requested to see 263 * boot text, don't render splash screen immediately 264 */ 265 if (DISABLESPLASH) 266 #endif 267 vcons_redraw_screen(&sc->sc_console_screen); 268 269 sc->sc_defaultscreen_descr.textops = &ri->ri_ops; 270 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps; 271 sc->sc_defaultscreen_descr.nrows = ri->ri_rows; 272 sc->sc_defaultscreen_descr.ncols = ri->ri_cols; 273 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, crow, 274 defattr); 275 276 /* Clear the whole screen to bring it to a known state. */ 277 if (sc->sc_want_clear) 278 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, defattr); 279 280 j = 0; 281 for (i = 0; i < min(1 << sc->sc_depth, 256); i++) { 282 #ifndef SPLASHSCREEN 283 sc->sc_cmap_red[i] = rasops_cmap[j]; 284 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 285 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 286 j += 3; 287 #else 288 if (i >= SPLASH_CMAP_OFFSET && 289 i < SPLASH_CMAP_OFFSET + SPLASH_CMAP_SIZE) { 290 splash_get_cmap(i, 291 &sc->sc_cmap_red[i], 292 &sc->sc_cmap_green[i], 293 &sc->sc_cmap_blue[i]); 294 } else { 295 sc->sc_cmap_red[i] = rasops_cmap[j]; 296 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 297 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 298 } 299 j += 3; 300 #endif 301 } 302 genfb_restore_palette(sc); 303 304 #ifdef SPLASHSCREEN 305 sc->sc_splash.si_depth = sc->sc_depth; 306 sc->sc_splash.si_bits = sc->sc_console_screen.scr_ri.ri_bits; 307 sc->sc_splash.si_hwbits = sc->sc_fbaddr; 308 sc->sc_splash.si_width = sc->sc_width; 309 sc->sc_splash.si_height = sc->sc_height; 310 sc->sc_splash.si_stride = sc->sc_stride; 311 sc->sc_splash.si_fillrect = NULL; 312 if (!DISABLESPLASH) { 313 error = splash_render(&sc->sc_splash, 314 SPLASH_F_CENTER|SPLASH_F_FILL); 315 if (error) { 316 SCREEN_ENABLE_DRAWING(&sc->sc_console_screen); 317 vcons_replay_msgbuf(&sc->sc_console_screen); 318 } 319 } 320 #else 321 vcons_replay_msgbuf(&sc->sc_console_screen); 322 #endif 323 324 if (genfb_softc == NULL) 325 genfb_softc = sc; 326 327 aa.console = console; 328 aa.scrdata = &sc->sc_screenlist; 329 aa.accessops = &genfb_accessops; 330 aa.accesscookie = &sc->vd; 331 332 #ifdef GENFB_DISABLE_TEXT 333 if (!DISABLESPLASH && error == 0) 334 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 335 #endif 336 337 config_found(sc->sc_dev, &aa, wsemuldisplaydevprint); 338 339 return 0; 340 } 341 342 static int 343 genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 344 struct lwp *l) 345 { 346 struct vcons_data *vd = v; 347 struct genfb_softc *sc = vd->cookie; 348 struct wsdisplay_fbinfo *wdf; 349 struct vcons_screen *ms = vd->active; 350 struct wsdisplay_param *param; 351 int new_mode, error; 352 353 switch (cmd) { 354 case WSDISPLAYIO_GINFO: 355 if (ms == NULL) 356 return ENODEV; 357 wdf = (void *)data; 358 wdf->height = ms->scr_ri.ri_height; 359 wdf->width = ms->scr_ri.ri_width; 360 wdf->depth = ms->scr_ri.ri_depth; 361 wdf->cmsize = 256; 362 return 0; 363 364 case WSDISPLAYIO_GETCMAP: 365 return genfb_getcmap(sc, 366 (struct wsdisplay_cmap *)data); 367 368 case WSDISPLAYIO_PUTCMAP: 369 return genfb_putcmap(sc, 370 (struct wsdisplay_cmap *)data); 371 372 case WSDISPLAYIO_LINEBYTES: 373 *(u_int *)data = sc->sc_stride; 374 return 0; 375 376 case WSDISPLAYIO_SMODE: 377 new_mode = *(int *)data; 378 379 /* notify the bus backend */ 380 error = 0; 381 if (sc->sc_ops.genfb_ioctl) 382 error = sc->sc_ops.genfb_ioctl(sc, vs, 383 cmd, data, flag, l); 384 if (error) 385 return error; 386 387 if (new_mode != sc->sc_mode) { 388 sc->sc_mode = new_mode; 389 if (sc->sc_modecb->gmc_setmode) 390 sc->sc_modecb->gmc_setmode(sc, 391 sc->sc_mode); 392 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 393 genfb_restore_palette(sc); 394 vcons_redraw_screen(ms); 395 } 396 } 397 return 0; 398 case WSDISPLAYIO_SSPLASH: 399 #if defined(SPLASHSCREEN) 400 if(*(int *)data == 1) { 401 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 402 splash_render(&sc->sc_splash, 403 SPLASH_F_CENTER|SPLASH_F_FILL); 404 } else { 405 SCREEN_ENABLE_DRAWING(&sc->sc_console_screen); 406 } 407 vcons_redraw_screen(ms); 408 return 0; 409 #else 410 return ENODEV; 411 #endif 412 case WSDISPLAYIO_GETPARAM: 413 param = (struct wsdisplay_param *)data; 414 if (sc->sc_backlight == NULL) 415 return EPASSTHROUGH; 416 switch (param->param) { 417 case WSDISPLAYIO_PARAM_BRIGHTNESS: 418 param->min = 0; 419 param->max = 255; 420 param->curval = sc->sc_backlight_level; 421 return 0; 422 case WSDISPLAYIO_PARAM_BACKLIGHT: 423 param->min = 0; 424 param->max = 1; 425 param->curval = sc->sc_backlight_on; 426 return 0; 427 } 428 return EPASSTHROUGH; 429 430 case WSDISPLAYIO_SETPARAM: 431 param = (struct wsdisplay_param *)data; 432 if (sc->sc_backlight == NULL) 433 return EPASSTHROUGH; 434 switch (param->param) { 435 case WSDISPLAYIO_PARAM_BRIGHTNESS: 436 genfb_set_backlight(sc, param->curval); 437 return 0; 438 case WSDISPLAYIO_PARAM_BACKLIGHT: 439 genfb_switch_backlight(sc, param->curval); 440 return 0; 441 } 442 return EPASSTHROUGH; 443 default: 444 if (sc->sc_ops.genfb_ioctl) 445 return sc->sc_ops.genfb_ioctl(sc, vs, cmd, 446 data, flag, l); 447 } 448 return EPASSTHROUGH; 449 } 450 451 static paddr_t 452 genfb_mmap(void *v, void *vs, off_t offset, int prot) 453 { 454 struct vcons_data *vd = v; 455 struct genfb_softc *sc = vd->cookie; 456 457 if (sc->sc_ops.genfb_mmap) 458 return sc->sc_ops.genfb_mmap(sc, vs, offset, prot); 459 460 return -1; 461 } 462 463 static void 464 genfb_init_screen(void *cookie, struct vcons_screen *scr, 465 int existing, long *defattr) 466 { 467 struct genfb_softc *sc = cookie; 468 struct rasops_info *ri = &scr->scr_ri; 469 470 ri->ri_depth = sc->sc_depth; 471 ri->ri_width = sc->sc_width; 472 ri->ri_height = sc->sc_height; 473 ri->ri_stride = sc->sc_stride; 474 ri->ri_flg = RI_CENTER; 475 if (sc->sc_want_clear) 476 ri->ri_flg |= RI_FULLCLEAR; 477 478 #ifdef GENFB_SHADOWFB 479 if (sc->sc_shadowfb != NULL) { 480 481 ri->ri_hwbits = (char *)sc->sc_fbaddr; 482 ri->ri_bits = (char *)sc->sc_shadowfb; 483 } else 484 #endif 485 { 486 ri->ri_bits = (char *)sc->sc_fbaddr; 487 scr->scr_flags |= VCONS_DONT_READ; 488 } 489 490 if (existing && sc->sc_want_clear) { 491 ri->ri_flg |= RI_CLEAR; 492 } 493 494 rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8); 495 ri->ri_caps = WSSCREEN_WSCOLORS; 496 497 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 498 sc->sc_width / ri->ri_font->fontwidth); 499 500 /* TODO: actually center output */ 501 ri->ri_hw = scr; 502 503 #ifdef GENFB_DISABLE_TEXT 504 if (scr == &sc->sc_console_screen && !DISABLESPLASH) 505 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 506 #endif 507 } 508 509 static int 510 genfb_putcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 511 { 512 u_char *r, *g, *b; 513 u_int index = cm->index; 514 u_int count = cm->count; 515 int i, error; 516 u_char rbuf[256], gbuf[256], bbuf[256]; 517 518 #ifdef GENFB_DEBUG 519 aprint_debug("putcmap: %d %d\n",index, count); 520 #endif 521 if (cm->index >= 256 || cm->count > 256 || 522 (cm->index + cm->count) > 256) 523 return EINVAL; 524 error = copyin(cm->red, &rbuf[index], count); 525 if (error) 526 return error; 527 error = copyin(cm->green, &gbuf[index], count); 528 if (error) 529 return error; 530 error = copyin(cm->blue, &bbuf[index], count); 531 if (error) 532 return error; 533 534 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 535 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 536 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 537 538 r = &sc->sc_cmap_red[index]; 539 g = &sc->sc_cmap_green[index]; 540 b = &sc->sc_cmap_blue[index]; 541 542 for (i = 0; i < count; i++) { 543 genfb_putpalreg(sc, index, *r, *g, *b); 544 index++; 545 r++, g++, b++; 546 } 547 return 0; 548 } 549 550 static int 551 genfb_getcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 552 { 553 u_int index = cm->index; 554 u_int count = cm->count; 555 int error; 556 557 if (index >= 255 || count > 256 || index + count > 256) 558 return EINVAL; 559 560 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 561 if (error) 562 return error; 563 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 564 if (error) 565 return error; 566 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 567 if (error) 568 return error; 569 570 return 0; 571 } 572 573 void 574 genfb_restore_palette(struct genfb_softc *sc) 575 { 576 int i; 577 578 if (sc->sc_depth <= 8) { 579 for (i = 0; i < (1 << sc->sc_depth); i++) { 580 genfb_putpalreg(sc, i, sc->sc_cmap_red[i], 581 sc->sc_cmap_green[i], sc->sc_cmap_blue[i]); 582 } 583 } 584 } 585 586 static int 587 genfb_putpalreg(struct genfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g, 588 uint8_t b) 589 { 590 591 if (sc->sc_cmcb) { 592 593 sc->sc_cmcb->gcc_set_mapreg(sc->sc_cmcb->gcc_cookie, 594 idx, r, g, b); 595 } 596 return 0; 597 } 598 599 void 600 genfb_cnattach(void) 601 { 602 genfb_cnattach_called = 1; 603 } 604 605 void 606 genfb_disable(void) 607 { 608 genfb_enabled = 0; 609 } 610 611 int 612 genfb_is_console(void) 613 { 614 return genfb_cnattach_called; 615 } 616 617 int 618 genfb_is_enabled(void) 619 { 620 return genfb_enabled; 621 } 622 623 int 624 genfb_borrow(bus_addr_t addr, bus_space_handle_t *hdlp) 625 { 626 struct genfb_softc *sc = genfb_softc; 627 628 if (sc && sc->sc_ops.genfb_borrow) 629 return sc->sc_ops.genfb_borrow(sc, addr, hdlp); 630 return 0; 631 } 632 633 static void 634 genfb_set_backlight(struct genfb_softc *sc, int level) 635 { 636 637 KASSERT(sc->sc_backlight != NULL); 638 639 /* 640 * should we do nothing when backlight is off, should we just store the 641 * level and use it when turning back on or should we just flip sc_bl_on 642 * and turn the backlight on? 643 * For now turn it on so a crashed screensaver can't get the user stuck 644 * with a dark screen as long as hotkeys work 645 */ 646 if (level > 255) level = 255; 647 if (level < 0) level = 0; 648 if (level == sc->sc_backlight_level) 649 return; 650 sc->sc_backlight_level = level; 651 if (sc->sc_backlight_on == 0) 652 sc->sc_backlight_on = 1; 653 sc->sc_backlight->gpc_set_parameter( 654 sc->sc_backlight->gpc_cookie, level); 655 } 656 657 static void 658 genfb_switch_backlight(struct genfb_softc *sc, int on) 659 { 660 int level; 661 662 KASSERT(sc->sc_backlight != NULL); 663 664 if (on == sc->sc_backlight_on) 665 return; 666 sc->sc_backlight_on = on; 667 level = on ? sc->sc_backlight_level : 0; 668 sc->sc_backlight->gpc_set_parameter( 669 sc->sc_backlight->gpc_cookie, level); 670 } 671 672 673 static void 674 genfb_brightness_up(device_t dev) 675 { 676 struct genfb_softc *sc = device_private(dev); 677 678 genfb_set_backlight(sc, sc->sc_backlight_level + 8); 679 } 680 681 static void 682 genfb_brightness_down(device_t dev) 683 { 684 struct genfb_softc *sc = device_private(dev); 685 686 genfb_set_backlight(sc, sc->sc_backlight_level - 8); 687 } 688
Indexes created Thu Sep 25 16:09:42 GMT 2025