genfb.c revision 1.39
1 /* $NetBSD: genfb.c,v 1.39 2011/03/08 03:16:30 macallan 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 1.39 2011/03/08 03:16:30 macallan 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, fbaddr; 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 sc->sc_fbaddr = NULL; 137 if (prop_dictionary_get_uint64(dict, "virtual_address", &fbaddr)) { 138 sc->sc_fbaddr = (void *)fbaddr; 139 } 140 141 if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) 142 sc->sc_stride = (sc->sc_width * sc->sc_depth) >> 3; 143 144 /* 145 * deal with a bug in the Raptor firmware which always sets 146 * stride = width even when depth != 8 147 */ 148 if (sc->sc_stride < sc->sc_width * (sc->sc_depth >> 3)) 149 sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3); 150 151 sc->sc_fbsize = sc->sc_height * sc->sc_stride; 152 153 /* optional colour map callback */ 154 sc->sc_cmcb = NULL; 155 if (prop_dictionary_get_uint64(dict, "cmap_callback", &cmap_cb)) { 156 if (cmap_cb != 0) 157 sc->sc_cmcb = (void *)(vaddr_t)cmap_cb; 158 } 159 160 /* optional pmf callback */ 161 sc->sc_pmfcb = NULL; 162 if (prop_dictionary_get_uint64(dict, "pmf_callback", &pmf_cb)) { 163 if (pmf_cb != 0) 164 sc->sc_pmfcb = (void *)(vaddr_t)pmf_cb; 165 } 166 167 /* optional mode callback */ 168 sc->sc_modecb = NULL; 169 if (prop_dictionary_get_uint64(dict, "mode_callback", &mode_cb)) { 170 if (mode_cb != 0) 171 sc->sc_modecb = (void *)(vaddr_t)mode_cb; 172 } 173 174 /* optional backlight control callback */ 175 sc->sc_backlight = NULL; 176 if (prop_dictionary_get_uint64(dict, "backlight_callback", &bl_cb)) { 177 if (bl_cb != 0) { 178 sc->sc_backlight = (void *)(vaddr_t)bl_cb; 179 sc->sc_backlight_on = 1; 180 aprint_naive_dev(sc->sc_dev, 181 "enabling backlight control\n"); 182 sc->sc_backlight_level = 183 sc->sc_backlight->gpc_get_parameter( 184 sc->sc_backlight->gpc_cookie); 185 if (console) { 186 pmf_event_register(sc->sc_dev, 187 PMFE_DISPLAY_BRIGHTNESS_UP, 188 genfb_brightness_up, TRUE); 189 pmf_event_register(sc->sc_dev, 190 PMFE_DISPLAY_BRIGHTNESS_DOWN, 191 genfb_brightness_down, TRUE); 192 } 193 } 194 } 195 } 196 197 int 198 genfb_attach(struct genfb_softc *sc, struct genfb_ops *ops) 199 { 200 struct wsemuldisplaydev_attach_args aa; 201 prop_dictionary_t dict; 202 struct rasops_info *ri; 203 uint16_t crow; 204 long defattr; 205 int i, j; 206 bool console; 207 #ifdef SPLASHSCREEN 208 int error = ENXIO; 209 #endif 210 211 dict = device_properties(sc->sc_dev); 212 prop_dictionary_get_bool(dict, "is_console", &console); 213 214 if (prop_dictionary_get_uint16(dict, "cursor-row", &crow) == false) 215 crow = 0; 216 if (prop_dictionary_get_bool(dict, "clear-screen", &sc->sc_want_clear) 217 == false) 218 sc->sc_want_clear = true; 219 220 /* do not attach when we're not console */ 221 if (!console) { 222 aprint_normal_dev(sc->sc_dev, "no console, unable to continue\n"); 223 return -1; 224 } 225 226 aprint_verbose_dev(sc->sc_dev, "framebuffer at %p, size %dx%d, depth %d, " 227 "stride %d\n", 228 sc->sc_fboffset ? (void *)(intptr_t)sc->sc_fboffset : sc->sc_fbaddr, 229 sc->sc_width, sc->sc_height, sc->sc_depth, sc->sc_stride); 230 231 sc->sc_defaultscreen_descr = (struct wsscreen_descr){ 232 "default", 233 0, 0, 234 NULL, 235 8, 16, 236 WSSCREEN_WSCOLORS | WSSCREEN_HILIT, 237 NULL 238 }; 239 sc->sc_screens[0] = &sc->sc_defaultscreen_descr; 240 sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens}; 241 memcpy(&sc->sc_ops, ops, sizeof(struct genfb_ops)); 242 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 243 if (sc->sc_modecb != NULL) 244 sc->sc_modecb->gmc_setmode(sc, sc->sc_mode); 245 246 #ifdef GENFB_SHADOWFB 247 sc->sc_shadowfb = kmem_alloc(sc->sc_fbsize, KM_SLEEP); 248 if (sc->sc_want_clear == false && sc->sc_shadowfb != NULL) 249 memcpy(sc->sc_shadowfb, sc->sc_fbaddr, sc->sc_fbsize); 250 #endif 251 252 vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, 253 &genfb_accessops); 254 sc->vd.init_screen = genfb_init_screen; 255 256 /* Do not print anything between this point and the screen 257 * clear operation below. Otherwise it will be lost. */ 258 259 ri = &sc->sc_console_screen.scr_ri; 260 261 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1, 262 &defattr); 263 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 264 265 #ifdef SPLASHSCREEN 266 /* 267 * If system isn't going to go multiuser, or user has requested to see 268 * boot text, don't render splash screen immediately 269 */ 270 if (DISABLESPLASH) 271 #endif 272 vcons_redraw_screen(&sc->sc_console_screen); 273 274 sc->sc_defaultscreen_descr.textops = &ri->ri_ops; 275 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps; 276 sc->sc_defaultscreen_descr.nrows = ri->ri_rows; 277 sc->sc_defaultscreen_descr.ncols = ri->ri_cols; 278 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, crow, 279 defattr); 280 281 /* Clear the whole screen to bring it to a known state. */ 282 if (sc->sc_want_clear) 283 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, defattr); 284 285 j = 0; 286 for (i = 0; i < min(1 << sc->sc_depth, 256); i++) { 287 #ifndef SPLASHSCREEN 288 sc->sc_cmap_red[i] = rasops_cmap[j]; 289 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 290 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 291 j += 3; 292 #else 293 if (i >= SPLASH_CMAP_OFFSET && 294 i < SPLASH_CMAP_OFFSET + SPLASH_CMAP_SIZE) { 295 splash_get_cmap(i, 296 &sc->sc_cmap_red[i], 297 &sc->sc_cmap_green[i], 298 &sc->sc_cmap_blue[i]); 299 } else { 300 sc->sc_cmap_red[i] = rasops_cmap[j]; 301 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 302 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 303 } 304 j += 3; 305 #endif 306 } 307 genfb_restore_palette(sc); 308 309 #ifdef SPLASHSCREEN 310 sc->sc_splash.si_depth = sc->sc_depth; 311 sc->sc_splash.si_bits = sc->sc_console_screen.scr_ri.ri_bits; 312 sc->sc_splash.si_hwbits = sc->sc_fbaddr; 313 sc->sc_splash.si_width = sc->sc_width; 314 sc->sc_splash.si_height = sc->sc_height; 315 sc->sc_splash.si_stride = sc->sc_stride; 316 sc->sc_splash.si_fillrect = NULL; 317 if (!DISABLESPLASH) { 318 error = splash_render(&sc->sc_splash, 319 SPLASH_F_CENTER|SPLASH_F_FILL); 320 if (error) { 321 SCREEN_ENABLE_DRAWING(&sc->sc_console_screen); 322 vcons_replay_msgbuf(&sc->sc_console_screen); 323 } 324 } 325 #else 326 vcons_replay_msgbuf(&sc->sc_console_screen); 327 #endif 328 329 if (genfb_softc == NULL) 330 genfb_softc = sc; 331 332 aa.console = console; 333 aa.scrdata = &sc->sc_screenlist; 334 aa.accessops = &genfb_accessops; 335 aa.accesscookie = &sc->vd; 336 337 #ifdef GENFB_DISABLE_TEXT 338 if (!DISABLESPLASH && error == 0) 339 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 340 #endif 341 342 config_found(sc->sc_dev, &aa, wsemuldisplaydevprint); 343 344 return 0; 345 } 346 347 static int 348 genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 349 struct lwp *l) 350 { 351 struct vcons_data *vd = v; 352 struct genfb_softc *sc = vd->cookie; 353 struct wsdisplay_fbinfo *wdf; 354 struct vcons_screen *ms = vd->active; 355 struct wsdisplay_param *param; 356 int new_mode, error; 357 358 switch (cmd) { 359 case WSDISPLAYIO_GINFO: 360 if (ms == NULL) 361 return ENODEV; 362 wdf = (void *)data; 363 wdf->height = ms->scr_ri.ri_height; 364 wdf->width = ms->scr_ri.ri_width; 365 wdf->depth = ms->scr_ri.ri_depth; 366 wdf->cmsize = 256; 367 return 0; 368 369 case WSDISPLAYIO_GETCMAP: 370 return genfb_getcmap(sc, 371 (struct wsdisplay_cmap *)data); 372 373 case WSDISPLAYIO_PUTCMAP: 374 return genfb_putcmap(sc, 375 (struct wsdisplay_cmap *)data); 376 377 case WSDISPLAYIO_LINEBYTES: 378 *(u_int *)data = sc->sc_stride; 379 return 0; 380 381 case WSDISPLAYIO_SMODE: 382 new_mode = *(int *)data; 383 384 /* notify the bus backend */ 385 error = 0; 386 if (sc->sc_ops.genfb_ioctl) 387 error = sc->sc_ops.genfb_ioctl(sc, vs, 388 cmd, data, flag, l); 389 if (error) 390 return error; 391 392 if (new_mode != sc->sc_mode) { 393 sc->sc_mode = new_mode; 394 if (sc->sc_modecb != NULL) 395 sc->sc_modecb->gmc_setmode(sc, 396 sc->sc_mode); 397 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 398 genfb_restore_palette(sc); 399 vcons_redraw_screen(ms); 400 } 401 } 402 return 0; 403 case WSDISPLAYIO_SSPLASH: 404 #if defined(SPLASHSCREEN) 405 if(*(int *)data == 1) { 406 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 407 splash_render(&sc->sc_splash, 408 SPLASH_F_CENTER|SPLASH_F_FILL); 409 } else { 410 SCREEN_ENABLE_DRAWING(&sc->sc_console_screen); 411 } 412 vcons_redraw_screen(ms); 413 return 0; 414 #else 415 return ENODEV; 416 #endif 417 case WSDISPLAYIO_GETPARAM: 418 param = (struct wsdisplay_param *)data; 419 if (sc->sc_backlight == NULL) 420 return EPASSTHROUGH; 421 switch (param->param) { 422 case WSDISPLAYIO_PARAM_BRIGHTNESS: 423 param->min = 0; 424 param->max = 255; 425 param->curval = sc->sc_backlight_level; 426 return 0; 427 case WSDISPLAYIO_PARAM_BACKLIGHT: 428 param->min = 0; 429 param->max = 1; 430 param->curval = sc->sc_backlight_on; 431 return 0; 432 } 433 return EPASSTHROUGH; 434 435 case WSDISPLAYIO_SETPARAM: 436 param = (struct wsdisplay_param *)data; 437 if (sc->sc_backlight == NULL) 438 return EPASSTHROUGH; 439 switch (param->param) { 440 case WSDISPLAYIO_PARAM_BRIGHTNESS: 441 genfb_set_backlight(sc, param->curval); 442 return 0; 443 case WSDISPLAYIO_PARAM_BACKLIGHT: 444 genfb_switch_backlight(sc, param->curval); 445 return 0; 446 } 447 return EPASSTHROUGH; 448 default: 449 if (sc->sc_ops.genfb_ioctl) 450 return sc->sc_ops.genfb_ioctl(sc, vs, cmd, 451 data, flag, l); 452 } 453 return EPASSTHROUGH; 454 } 455 456 static paddr_t 457 genfb_mmap(void *v, void *vs, off_t offset, int prot) 458 { 459 struct vcons_data *vd = v; 460 struct genfb_softc *sc = vd->cookie; 461 462 if (sc->sc_ops.genfb_mmap) 463 return sc->sc_ops.genfb_mmap(sc, vs, offset, prot); 464 465 return -1; 466 } 467 468 static void 469 genfb_init_screen(void *cookie, struct vcons_screen *scr, 470 int existing, long *defattr) 471 { 472 struct genfb_softc *sc = cookie; 473 struct rasops_info *ri = &scr->scr_ri; 474 475 ri->ri_depth = sc->sc_depth; 476 ri->ri_width = sc->sc_width; 477 ri->ri_height = sc->sc_height; 478 ri->ri_stride = sc->sc_stride; 479 ri->ri_flg = RI_CENTER; 480 if (sc->sc_want_clear) 481 ri->ri_flg |= RI_FULLCLEAR; 482 483 #ifdef GENFB_SHADOWFB 484 if (sc->sc_shadowfb != NULL) { 485 486 ri->ri_hwbits = (char *)sc->sc_fbaddr; 487 ri->ri_bits = (char *)sc->sc_shadowfb; 488 } else 489 #endif 490 { 491 ri->ri_bits = (char *)sc->sc_fbaddr; 492 scr->scr_flags |= VCONS_DONT_READ; 493 } 494 495 if (existing && sc->sc_want_clear) { 496 ri->ri_flg |= RI_CLEAR; 497 } 498 499 rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8); 500 ri->ri_caps = WSSCREEN_WSCOLORS; 501 502 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 503 sc->sc_width / ri->ri_font->fontwidth); 504 505 /* TODO: actually center output */ 506 ri->ri_hw = scr; 507 508 #ifdef GENFB_DISABLE_TEXT 509 if (scr == &sc->sc_console_screen && !DISABLESPLASH) 510 SCREEN_DISABLE_DRAWING(&sc->sc_console_screen); 511 #endif 512 } 513 514 static int 515 genfb_putcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 516 { 517 u_char *r, *g, *b; 518 u_int index = cm->index; 519 u_int count = cm->count; 520 int i, error; 521 u_char rbuf[256], gbuf[256], bbuf[256]; 522 523 #ifdef GENFB_DEBUG 524 aprint_debug("putcmap: %d %d\n",index, count); 525 #endif 526 if (cm->index >= 256 || cm->count > 256 || 527 (cm->index + cm->count) > 256) 528 return EINVAL; 529 error = copyin(cm->red, &rbuf[index], count); 530 if (error) 531 return error; 532 error = copyin(cm->green, &gbuf[index], count); 533 if (error) 534 return error; 535 error = copyin(cm->blue, &bbuf[index], count); 536 if (error) 537 return error; 538 539 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 540 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 541 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 542 543 r = &sc->sc_cmap_red[index]; 544 g = &sc->sc_cmap_green[index]; 545 b = &sc->sc_cmap_blue[index]; 546 547 for (i = 0; i < count; i++) { 548 genfb_putpalreg(sc, index, *r, *g, *b); 549 index++; 550 r++, g++, b++; 551 } 552 return 0; 553 } 554 555 static int 556 genfb_getcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 557 { 558 u_int index = cm->index; 559 u_int count = cm->count; 560 int error; 561 562 if (index >= 255 || count > 256 || index + count > 256) 563 return EINVAL; 564 565 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 566 if (error) 567 return error; 568 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 569 if (error) 570 return error; 571 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 572 if (error) 573 return error; 574 575 return 0; 576 } 577 578 void 579 genfb_restore_palette(struct genfb_softc *sc) 580 { 581 int i; 582 583 if (sc->sc_depth <= 8) { 584 for (i = 0; i < (1 << sc->sc_depth); i++) { 585 genfb_putpalreg(sc, i, sc->sc_cmap_red[i], 586 sc->sc_cmap_green[i], sc->sc_cmap_blue[i]); 587 } 588 } 589 } 590 591 static int 592 genfb_putpalreg(struct genfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g, 593 uint8_t b) 594 { 595 596 if (sc->sc_cmcb) { 597 598 sc->sc_cmcb->gcc_set_mapreg(sc->sc_cmcb->gcc_cookie, 599 idx, r, g, b); 600 } 601 return 0; 602 } 603 604 void 605 genfb_cnattach(void) 606 { 607 genfb_cnattach_called = 1; 608 } 609 610 void 611 genfb_disable(void) 612 { 613 genfb_enabled = 0; 614 } 615 616 int 617 genfb_is_console(void) 618 { 619 return genfb_cnattach_called; 620 } 621 622 int 623 genfb_is_enabled(void) 624 { 625 return genfb_enabled; 626 } 627 628 int 629 genfb_borrow(bus_addr_t addr, bus_space_handle_t *hdlp) 630 { 631 struct genfb_softc *sc = genfb_softc; 632 633 if (sc && sc->sc_ops.genfb_borrow) 634 return sc->sc_ops.genfb_borrow(sc, addr, hdlp); 635 return 0; 636 } 637 638 static void 639 genfb_set_backlight(struct genfb_softc *sc, int level) 640 { 641 642 KASSERT(sc->sc_backlight != NULL); 643 644 /* 645 * should we do nothing when backlight is off, should we just store the 646 * level and use it when turning back on or should we just flip sc_bl_on 647 * and turn the backlight on? 648 * For now turn it on so a crashed screensaver can't get the user stuck 649 * with a dark screen as long as hotkeys work 650 */ 651 if (level > 255) level = 255; 652 if (level < 0) level = 0; 653 if (level == sc->sc_backlight_level) 654 return; 655 sc->sc_backlight_level = level; 656 if (sc->sc_backlight_on == 0) 657 sc->sc_backlight_on = 1; 658 sc->sc_backlight->gpc_set_parameter( 659 sc->sc_backlight->gpc_cookie, level); 660 } 661 662 static void 663 genfb_switch_backlight(struct genfb_softc *sc, int on) 664 { 665 int level; 666 667 KASSERT(sc->sc_backlight != NULL); 668 669 if (on == sc->sc_backlight_on) 670 return; 671 sc->sc_backlight_on = on; 672 level = on ? sc->sc_backlight_level : 0; 673 sc->sc_backlight->gpc_set_parameter( 674 sc->sc_backlight->gpc_cookie, level); 675 } 676 677 678 static void 679 genfb_brightness_up(device_t dev) 680 { 681 struct genfb_softc *sc = device_private(dev); 682 683 genfb_set_backlight(sc, sc->sc_backlight_level + 8); 684 } 685 686 static void 687 genfb_brightness_down(device_t dev) 688 { 689 struct genfb_softc *sc = device_private(dev); 690 691 genfb_set_backlight(sc, sc->sc_backlight_level - 8); 692 } 693 694 void 695 genfb_enable_polling(device_t dev) 696 { 697 struct genfb_softc *sc = device_private(dev); 698 699 if (sc->sc_console_screen.scr_vd) { 700 SCREEN_ENABLE_DRAWING(&sc->sc_console_screen); 701 vcons_hard_switch(&sc->sc_console_screen); 702 vcons_enable_polling(&sc->vd); 703 } 704 } 705 706 void 707 genfb_disable_polling(device_t dev) 708 { 709 struct genfb_softc *sc = device_private(dev); 710 711 if (sc->sc_console_screen.scr_vd) { 712 vcons_disable_polling(&sc->vd); 713 } 714 } 715
Indexes created Fri Sep 26 08:10:20 GMT 2025