Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_fb_helper.c
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1 /* 2 * Copyright (c) 2006-2009 Red Hat Inc. 3 * Copyright (c) 2006-2008 Intel Corporation 4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 5 * 6 * DRM framebuffer helper functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Dave Airlie <airlied@linux.ie> 28 * Jesse Barnes <jesse.barnes@intel.com> 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 35 36 #include <dev/drm2/drmP.h> 37 #include <dev/drm2/drm_crtc.h> 38 #include <dev/drm2/drm_fb_helper.h> 39 #include <dev/drm2/drm_crtc_helper.h> 40 41 MODULE_AUTHOR("David Airlie, Jesse Barnes"); 42 MODULE_DESCRIPTION("DRM KMS helper"); 43 MODULE_LICENSE("GPL and additional rights"); 44 45 static DRM_LIST_HEAD(kernel_fb_helper_list); 46 47 #include <sys/kdb.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 51 struct vt_kms_softc { 52 struct drm_fb_helper *fb_helper; 53 struct task fb_mode_task; 54 }; 55 56 /* Call restore out of vt(9) locks. */ 57 static void 58 vt_restore_fbdev_mode(void *arg, int pending) 59 { 60 struct drm_fb_helper *fb_helper; 61 struct vt_kms_softc *sc; 62 63 sc = (struct vt_kms_softc *)arg; 64 fb_helper = sc->fb_helper; 65 sx_xlock(&fb_helper->dev->mode_config.mutex); 66 drm_fb_helper_restore_fbdev_mode(fb_helper); 67 sx_xunlock(&fb_helper->dev->mode_config.mutex); 68 } 69 70 static int 71 vt_kms_postswitch(void *arg) 72 { 73 struct vt_kms_softc *sc; 74 75 sc = (struct vt_kms_softc *)arg; 76 77 if (!kdb_active && !KERNEL_PANICKED()) 78 taskqueue_enqueue(taskqueue_thread, &sc->fb_mode_task); 79 else 80 drm_fb_helper_restore_fbdev_mode(sc->fb_helper); 81 82 return (0); 83 } 84 85 struct fb_info * 86 framebuffer_alloc() 87 { 88 struct fb_info *info; 89 struct vt_kms_softc *sc; 90 91 info = malloc(sizeof(*info), DRM_MEM_KMS, M_WAITOK | M_ZERO); 92 93 sc = malloc(sizeof(*sc), DRM_MEM_KMS, M_WAITOK | M_ZERO); 94 TASK_INIT(&sc->fb_mode_task, 0, vt_restore_fbdev_mode, sc); 95 96 info->fb_priv = sc; 97 info->enter = &vt_kms_postswitch; 98 99 return (info); 100 } 101 102 void 103 framebuffer_release(struct fb_info *info) 104 { 105 106 free(info->fb_priv, DRM_MEM_KMS); 107 free(info, DRM_MEM_KMS); 108 } 109 110 static int 111 fb_get_options(const char *connector_name, char **option) 112 { 113 char tunable[64]; 114 115 /* 116 * A user may use loader tunables to set a specific mode for the 117 * console. Tunables are read in the following order: 118 * 1. kern.vt.fb.modes.$connector_name 119 * 2. kern.vt.fb.default_mode 120 * 121 * Example of a mode specific to the LVDS connector: 122 * kern.vt.fb.modes.LVDS="1024x768" 123 * 124 * Example of a mode applied to all connectors not having a 125 * connector-specific mode: 126 * kern.vt.fb.default_mode="640x480" 127 */ 128 snprintf(tunable, sizeof(tunable), "kern.vt.fb.modes.%s", 129 connector_name); 130 DRM_INFO("Connector %s: get mode from tunables:\n", connector_name); 131 DRM_INFO(" - %s\n", tunable); 132 DRM_INFO(" - kern.vt.fb.default_mode\n"); 133 *option = kern_getenv(tunable); 134 if (*option == NULL) 135 *option = kern_getenv("kern.vt.fb.default_mode"); 136 137 return (*option != NULL ? 0 : -ENOENT); 138 } 139 140 /** 141 * DOC: fbdev helpers 142 * 143 * The fb helper functions are useful to provide an fbdev on top of a drm kernel 144 * mode setting driver. They can be used mostly independantely from the crtc 145 * helper functions used by many drivers to implement the kernel mode setting 146 * interfaces. 147 */ 148 149 /* simple single crtc case helper function */ 150 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) 151 { 152 struct drm_device *dev = fb_helper->dev; 153 struct drm_connector *connector; 154 int i; 155 156 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 157 struct drm_fb_helper_connector *fb_helper_connector; 158 159 fb_helper_connector = malloc(sizeof(struct drm_fb_helper_connector), 160 DRM_MEM_KMS, M_NOWAIT | M_ZERO); 161 if (!fb_helper_connector) 162 goto fail; 163 164 fb_helper_connector->connector = connector; 165 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; 166 } 167 return 0; 168 fail: 169 for (i = 0; i < fb_helper->connector_count; i++) { 170 free(fb_helper->connector_info[i], DRM_MEM_KMS); 171 fb_helper->connector_info[i] = NULL; 172 } 173 fb_helper->connector_count = 0; 174 return -ENOMEM; 175 } 176 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); 177 178 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) 179 { 180 struct drm_fb_helper_connector *fb_helper_conn; 181 int i; 182 183 for (i = 0; i < fb_helper->connector_count; i++) { 184 struct drm_cmdline_mode *mode; 185 struct drm_connector *connector; 186 char *option = NULL; 187 188 fb_helper_conn = fb_helper->connector_info[i]; 189 connector = fb_helper_conn->connector; 190 mode = &fb_helper_conn->cmdline_mode; 191 192 /* do something on return - turn off connector maybe */ 193 if (fb_get_options(drm_get_connector_name(connector), &option)) 194 continue; 195 196 if (drm_mode_parse_command_line_for_connector(option, 197 connector, 198 mode)) { 199 if (mode->force) { 200 const char *s; 201 switch (mode->force) { 202 case DRM_FORCE_OFF: 203 s = "OFF"; 204 break; 205 case DRM_FORCE_ON_DIGITAL: 206 s = "ON - dig"; 207 break; 208 default: 209 case DRM_FORCE_ON: 210 s = "ON"; 211 break; 212 } 213 214 DRM_INFO("forcing %s connector %s\n", 215 drm_get_connector_name(connector), s); 216 connector->force = mode->force; 217 } 218 219 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 220 drm_get_connector_name(connector), 221 mode->xres, mode->yres, 222 mode->refresh_specified ? mode->refresh : 60, 223 mode->rb ? " reduced blanking" : "", 224 mode->margins ? " with margins" : "", 225 mode->interlace ? " interlaced" : ""); 226 } 227 228 freeenv(option); 229 } 230 return 0; 231 } 232 233 #if 0 && defined(FREEBSD_NOTYET) 234 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) 235 { 236 uint16_t *r_base, *g_base, *b_base; 237 int i; 238 239 r_base = crtc->gamma_store; 240 g_base = r_base + crtc->gamma_size; 241 b_base = g_base + crtc->gamma_size; 242 243 for (i = 0; i < crtc->gamma_size; i++) 244 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); 245 } 246 247 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) 248 { 249 uint16_t *r_base, *g_base, *b_base; 250 251 if (crtc->funcs->gamma_set == NULL) 252 return; 253 254 r_base = crtc->gamma_store; 255 g_base = r_base + crtc->gamma_size; 256 b_base = g_base + crtc->gamma_size; 257 258 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 259 } 260 261 int drm_fb_helper_debug_enter(struct fb_info *info) 262 { 263 struct drm_fb_helper *helper = info->par; 264 struct drm_crtc_helper_funcs *funcs; 265 int i; 266 267 if (list_empty(&kernel_fb_helper_list)) 268 return false; 269 270 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { 271 for (i = 0; i < helper->crtc_count; i++) { 272 struct drm_mode_set *mode_set = 273 &helper->crtc_info[i].mode_set; 274 275 if (!mode_set->crtc->enabled) 276 continue; 277 278 funcs = mode_set->crtc->helper_private; 279 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); 280 funcs->mode_set_base_atomic(mode_set->crtc, 281 mode_set->fb, 282 mode_set->x, 283 mode_set->y, 284 ENTER_ATOMIC_MODE_SET); 285 } 286 } 287 288 return 0; 289 } 290 EXPORT_SYMBOL(drm_fb_helper_debug_enter); 291 292 /* Find the real fb for a given fb helper CRTC */ 293 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) 294 { 295 struct drm_device *dev = crtc->dev; 296 struct drm_crtc *c; 297 298 list_for_each_entry(c, &dev->mode_config.crtc_list, head) { 299 if (crtc->base.id == c->base.id) 300 return c->fb; 301 } 302 303 return NULL; 304 } 305 306 int drm_fb_helper_debug_leave(struct fb_info *info) 307 { 308 struct drm_fb_helper *helper = info->par; 309 struct drm_crtc *crtc; 310 struct drm_crtc_helper_funcs *funcs; 311 struct drm_framebuffer *fb; 312 int i; 313 314 for (i = 0; i < helper->crtc_count; i++) { 315 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; 316 crtc = mode_set->crtc; 317 funcs = crtc->helper_private; 318 fb = drm_mode_config_fb(crtc); 319 320 if (!crtc->enabled) 321 continue; 322 323 if (!fb) { 324 DRM_ERROR("no fb to restore??\n"); 325 continue; 326 } 327 328 drm_fb_helper_restore_lut_atomic(mode_set->crtc); 329 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, 330 crtc->y, LEAVE_ATOMIC_MODE_SET); 331 } 332 333 return 0; 334 } 335 EXPORT_SYMBOL(drm_fb_helper_debug_leave); 336 #endif /* FREEBSD_NOTYET */ 337 338 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) 339 { 340 bool error = false; 341 int i, ret; 342 343 for (i = 0; i < fb_helper->crtc_count; i++) { 344 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; 345 ret = mode_set->crtc->funcs->set_config(mode_set); 346 if (ret) 347 error = true; 348 } 349 return error; 350 } 351 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode); 352 353 static bool drm_fb_helper_force_kernel_mode(void) 354 { 355 bool ret, error = false; 356 struct drm_fb_helper *helper; 357 358 if (list_empty(&kernel_fb_helper_list)) 359 return false; 360 361 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { 362 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF) 363 continue; 364 365 ret = drm_fb_helper_restore_fbdev_mode(helper); 366 if (ret) 367 error = true; 368 } 369 return error; 370 } 371 372 #if 0 && defined(FREEBSD_NOTYET) 373 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, 374 void *panic_str) 375 { 376 /* 377 * It's a waste of time and effort to switch back to text console 378 * if the kernel should reboot before panic messages can be seen. 379 */ 380 if (panic_timeout < 0) 381 return 0; 382 383 pr_err("panic occurred, switching back to text console\n"); 384 return drm_fb_helper_force_kernel_mode(); 385 } 386 EXPORT_SYMBOL(drm_fb_helper_panic); 387 388 static struct notifier_block paniced = { 389 .notifier_call = drm_fb_helper_panic, 390 }; 391 #endif /* FREEBSD_NOTYET */ 392 393 /** 394 * drm_fb_helper_restore - restore the framebuffer console (kernel) config 395 * 396 * Restore's the kernel's fbcon mode, used for lastclose & panic paths. 397 */ 398 void drm_fb_helper_restore(void) 399 { 400 bool ret; 401 ret = drm_fb_helper_force_kernel_mode(); 402 if (ret == true) 403 DRM_ERROR("Failed to restore crtc configuration\n"); 404 } 405 EXPORT_SYMBOL(drm_fb_helper_restore); 406 407 #ifdef __linux__ 408 #ifdef CONFIG_MAGIC_SYSRQ 409 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) 410 { 411 drm_fb_helper_restore(); 412 } 413 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); 414 415 static void drm_fb_helper_sysrq(int dummy1) 416 { 417 schedule_work(&drm_fb_helper_restore_work); 418 } 419 420 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { 421 .handler = drm_fb_helper_sysrq, 422 .help_msg = "force-fb(V)", 423 .action_msg = "Restore framebuffer console", 424 }; 425 #else 426 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; 427 #endif 428 #endif 429 430 #if 0 && defined(FREEBSD_NOTYET) 431 static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) 432 { 433 struct drm_fb_helper *fb_helper = info->par; 434 struct drm_device *dev = fb_helper->dev; 435 struct drm_crtc *crtc; 436 struct drm_connector *connector; 437 int i, j; 438 439 /* 440 * For each CRTC in this fb, turn the connectors on/off. 441 */ 442 sx_xlock(&dev->mode_config.mutex); 443 for (i = 0; i < fb_helper->crtc_count; i++) { 444 crtc = fb_helper->crtc_info[i].mode_set.crtc; 445 446 if (!crtc->enabled) 447 continue; 448 449 /* Walk the connectors & encoders on this fb turning them on/off */ 450 for (j = 0; j < fb_helper->connector_count; j++) { 451 connector = fb_helper->connector_info[j]->connector; 452 connector->funcs->dpms(connector, dpms_mode); 453 drm_object_property_set_value(&connector->base, 454 dev->mode_config.dpms_property, dpms_mode); 455 } 456 } 457 sx_xunlock(&dev->mode_config.mutex); 458 } 459 460 int drm_fb_helper_blank(int blank, struct fb_info *info) 461 { 462 switch (blank) { 463 /* Display: On; HSync: On, VSync: On */ 464 case FB_BLANK_UNBLANK: 465 drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); 466 break; 467 /* Display: Off; HSync: On, VSync: On */ 468 case FB_BLANK_NORMAL: 469 drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); 470 break; 471 /* Display: Off; HSync: Off, VSync: On */ 472 case FB_BLANK_HSYNC_SUSPEND: 473 drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); 474 break; 475 /* Display: Off; HSync: On, VSync: Off */ 476 case FB_BLANK_VSYNC_SUSPEND: 477 drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); 478 break; 479 /* Display: Off; HSync: Off, VSync: Off */ 480 case FB_BLANK_POWERDOWN: 481 drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); 482 break; 483 } 484 return 0; 485 } 486 EXPORT_SYMBOL(drm_fb_helper_blank); 487 #endif /* FREEBSD_NOTYET */ 488 489 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) 490 { 491 int i; 492 493 for (i = 0; i < helper->connector_count; i++) 494 free(helper->connector_info[i], DRM_MEM_KMS); 495 free(helper->connector_info, DRM_MEM_KMS); 496 for (i = 0; i < helper->crtc_count; i++) { 497 free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS); 498 if (helper->crtc_info[i].mode_set.mode) 499 drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); 500 } 501 free(helper->crtc_info, DRM_MEM_KMS); 502 } 503 504 int drm_fb_helper_init(struct drm_device *dev, 505 struct drm_fb_helper *fb_helper, 506 int crtc_count, int max_conn_count) 507 { 508 struct drm_crtc *crtc; 509 int i; 510 511 fb_helper->dev = dev; 512 513 INIT_LIST_HEAD(&fb_helper->kernel_fb_list); 514 515 fb_helper->crtc_info = malloc(crtc_count * sizeof(struct drm_fb_helper_crtc), 516 DRM_MEM_KMS, M_NOWAIT | M_ZERO); 517 if (!fb_helper->crtc_info) 518 return -ENOMEM; 519 520 fb_helper->crtc_count = crtc_count; 521 fb_helper->connector_info = malloc(dev->mode_config.num_connector * sizeof(struct drm_fb_helper_connector *), 522 DRM_MEM_KMS, M_NOWAIT | M_ZERO); 523 if (!fb_helper->connector_info) { 524 free(fb_helper->crtc_info, DRM_MEM_KMS); 525 return -ENOMEM; 526 } 527 fb_helper->connector_count = 0; 528 529 for (i = 0; i < crtc_count; i++) { 530 fb_helper->crtc_info[i].mode_set.connectors = 531 malloc(max_conn_count * 532 sizeof(struct drm_connector *), 533 DRM_MEM_KMS, M_NOWAIT | M_ZERO); 534 535 if (!fb_helper->crtc_info[i].mode_set.connectors) 536 goto out_free; 537 fb_helper->crtc_info[i].mode_set.num_connectors = 0; 538 } 539 540 i = 0; 541 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 542 fb_helper->crtc_info[i].mode_set.crtc = crtc; 543 i++; 544 } 545 546 return 0; 547 out_free: 548 drm_fb_helper_crtc_free(fb_helper); 549 return -ENOMEM; 550 } 551 EXPORT_SYMBOL(drm_fb_helper_init); 552 553 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) 554 { 555 if (!list_empty(&fb_helper->kernel_fb_list)) { 556 list_del(&fb_helper->kernel_fb_list); 557 #if 0 && defined(FREEBSD_NOTYET) 558 if (list_empty(&kernel_fb_helper_list)) { 559 pr_info("drm: unregistered panic notifier\n"); 560 atomic_notifier_chain_unregister(&panic_notifier_list, 561 &paniced); 562 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); 563 } 564 #endif /* FREEBSD_NOTYET */ 565 } 566 567 drm_fb_helper_crtc_free(fb_helper); 568 569 } 570 EXPORT_SYMBOL(drm_fb_helper_fini); 571 572 #if 0 && defined(FREEBSD_NOTYET) 573 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, 574 u16 blue, u16 regno, struct fb_info *info) 575 { 576 struct drm_fb_helper *fb_helper = info->par; 577 struct drm_framebuffer *fb = fb_helper->fb; 578 int pindex; 579 580 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 581 u32 *palette; 582 u32 value; 583 /* place color in pseudopalette */ 584 if (regno > 16) 585 return -EINVAL; 586 palette = (u32 *)info->pseudo_palette; 587 red >>= (16 - info->var.red.length); 588 green >>= (16 - info->var.green.length); 589 blue >>= (16 - info->var.blue.length); 590 value = (red << info->var.red.offset) | 591 (green << info->var.green.offset) | 592 (blue << info->var.blue.offset); 593 if (info->var.transp.length > 0) { 594 u32 mask = (1 << info->var.transp.length) - 1; 595 mask <<= info->var.transp.offset; 596 value |= mask; 597 } 598 palette[regno] = value; 599 return 0; 600 } 601 602 pindex = regno; 603 604 if (fb->bits_per_pixel == 16) { 605 pindex = regno << 3; 606 607 if (fb->depth == 16 && regno > 63) 608 return -EINVAL; 609 if (fb->depth == 15 && regno > 31) 610 return -EINVAL; 611 612 if (fb->depth == 16) { 613 u16 r, g, b; 614 int i; 615 if (regno < 32) { 616 for (i = 0; i < 8; i++) 617 fb_helper->funcs->gamma_set(crtc, red, 618 green, blue, pindex + i); 619 } 620 621 fb_helper->funcs->gamma_get(crtc, &r, 622 &g, &b, 623 pindex >> 1); 624 625 for (i = 0; i < 4; i++) 626 fb_helper->funcs->gamma_set(crtc, r, 627 green, b, 628 (pindex >> 1) + i); 629 } 630 } 631 632 if (fb->depth != 16) 633 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); 634 return 0; 635 } 636 637 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) 638 { 639 struct drm_fb_helper *fb_helper = info->par; 640 struct drm_crtc_helper_funcs *crtc_funcs; 641 u16 *red, *green, *blue, *transp; 642 struct drm_crtc *crtc; 643 int i, j, rc = 0; 644 int start; 645 646 for (i = 0; i < fb_helper->crtc_count; i++) { 647 crtc = fb_helper->crtc_info[i].mode_set.crtc; 648 crtc_funcs = crtc->helper_private; 649 650 red = cmap->red; 651 green = cmap->green; 652 blue = cmap->blue; 653 transp = cmap->transp; 654 start = cmap->start; 655 656 for (j = 0; j < cmap->len; j++) { 657 u16 hred, hgreen, hblue, htransp = 0xffff; 658 659 hred = *red++; 660 hgreen = *green++; 661 hblue = *blue++; 662 663 if (transp) 664 htransp = *transp++; 665 666 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); 667 if (rc) 668 return rc; 669 } 670 crtc_funcs->load_lut(crtc); 671 } 672 return rc; 673 } 674 EXPORT_SYMBOL(drm_fb_helper_setcmap); 675 676 int drm_fb_helper_check_var(struct fb_var_screeninfo *var, 677 struct fb_info *info) 678 { 679 struct drm_fb_helper *fb_helper = info->par; 680 struct drm_framebuffer *fb = fb_helper->fb; 681 int depth; 682 683 if (var->pixclock != 0 || in_dbg_master()) 684 return -EINVAL; 685 686 /* Need to resize the fb object !!! */ 687 if (var->bits_per_pixel > fb->bits_per_pixel || 688 var->xres > fb->width || var->yres > fb->height || 689 var->xres_virtual > fb->width || var->yres_virtual > fb->height) { 690 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " 691 "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", 692 var->xres, var->yres, var->bits_per_pixel, 693 var->xres_virtual, var->yres_virtual, 694 fb->width, fb->height, fb->bits_per_pixel); 695 return -EINVAL; 696 } 697 698 switch (var->bits_per_pixel) { 699 case 16: 700 depth = (var->green.length == 6) ? 16 : 15; 701 break; 702 case 32: 703 depth = (var->transp.length > 0) ? 32 : 24; 704 break; 705 default: 706 depth = var->bits_per_pixel; 707 break; 708 } 709 710 switch (depth) { 711 case 8: 712 var->red.offset = 0; 713 var->green.offset = 0; 714 var->blue.offset = 0; 715 var->red.length = 8; 716 var->green.length = 8; 717 var->blue.length = 8; 718 var->transp.length = 0; 719 var->transp.offset = 0; 720 break; 721 case 15: 722 var->red.offset = 10; 723 var->green.offset = 5; 724 var->blue.offset = 0; 725 var->red.length = 5; 726 var->green.length = 5; 727 var->blue.length = 5; 728 var->transp.length = 1; 729 var->transp.offset = 15; 730 break; 731 case 16: 732 var->red.offset = 11; 733 var->green.offset = 5; 734 var->blue.offset = 0; 735 var->red.length = 5; 736 var->green.length = 6; 737 var->blue.length = 5; 738 var->transp.length = 0; 739 var->transp.offset = 0; 740 break; 741 case 24: 742 var->red.offset = 16; 743 var->green.offset = 8; 744 var->blue.offset = 0; 745 var->red.length = 8; 746 var->green.length = 8; 747 var->blue.length = 8; 748 var->transp.length = 0; 749 var->transp.offset = 0; 750 break; 751 case 32: 752 var->red.offset = 16; 753 var->green.offset = 8; 754 var->blue.offset = 0; 755 var->red.length = 8; 756 var->green.length = 8; 757 var->blue.length = 8; 758 var->transp.length = 8; 759 var->transp.offset = 24; 760 break; 761 default: 762 return -EINVAL; 763 } 764 return 0; 765 } 766 EXPORT_SYMBOL(drm_fb_helper_check_var); 767 768 /* this will let fbcon do the mode init */ 769 int drm_fb_helper_set_par(struct fb_info *info) 770 { 771 struct drm_fb_helper *fb_helper = info->par; 772 struct drm_device *dev = fb_helper->dev; 773 struct fb_var_screeninfo *var = &info->var; 774 struct drm_crtc *crtc; 775 int ret; 776 int i; 777 778 if (var->pixclock != 0) { 779 DRM_ERROR("PIXEL CLOCK SET\n"); 780 return -EINVAL; 781 } 782 783 sx_xlock(&dev->mode_config.mutex); 784 for (i = 0; i < fb_helper->crtc_count; i++) { 785 crtc = fb_helper->crtc_info[i].mode_set.crtc; 786 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set); 787 if (ret) { 788 sx_xunlock(&dev->mode_config.mutex); 789 return ret; 790 } 791 } 792 sx_xunlock(&dev->mode_config.mutex); 793 794 if (fb_helper->delayed_hotplug) { 795 fb_helper->delayed_hotplug = false; 796 drm_fb_helper_hotplug_event(fb_helper); 797 } 798 return 0; 799 } 800 EXPORT_SYMBOL(drm_fb_helper_set_par); 801 802 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, 803 struct fb_info *info) 804 { 805 struct drm_fb_helper *fb_helper = info->par; 806 struct drm_device *dev = fb_helper->dev; 807 struct drm_mode_set *modeset; 808 struct drm_crtc *crtc; 809 int ret = 0; 810 int i; 811 812 sx_xlock(&dev->mode_config.mutex); 813 for (i = 0; i < fb_helper->crtc_count; i++) { 814 crtc = fb_helper->crtc_info[i].mode_set.crtc; 815 816 modeset = &fb_helper->crtc_info[i].mode_set; 817 818 modeset->x = var->xoffset; 819 modeset->y = var->yoffset; 820 821 if (modeset->num_connectors) { 822 ret = crtc->funcs->set_config(modeset); 823 if (!ret) { 824 info->var.xoffset = var->xoffset; 825 info->var.yoffset = var->yoffset; 826 } 827 } 828 } 829 sx_xunlock(&dev->mode_config.mutex); 830 return ret; 831 } 832 EXPORT_SYMBOL(drm_fb_helper_pan_display); 833 #endif /* FREEBSD_NOTYET */ 834 835 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, 836 int preferred_bpp) 837 { 838 int new_fb = 0; 839 int crtc_count = 0; 840 int i; 841 struct fb_info *info; 842 struct drm_fb_helper_surface_size sizes; 843 int gamma_size = 0; 844 #if defined(__FreeBSD__) 845 struct drm_crtc *crtc; 846 struct drm_device *dev; 847 int ret; 848 device_t kdev; 849 #endif 850 851 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); 852 sizes.surface_depth = 24; 853 sizes.surface_bpp = 32; 854 sizes.fb_width = (unsigned)-1; 855 sizes.fb_height = (unsigned)-1; 856 857 /* if driver picks 8 or 16 by default use that 858 for both depth/bpp */ 859 if (preferred_bpp != sizes.surface_bpp) 860 sizes.surface_depth = sizes.surface_bpp = preferred_bpp; 861 862 /* first up get a count of crtcs now in use and new min/maxes width/heights */ 863 for (i = 0; i < fb_helper->connector_count; i++) { 864 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; 865 struct drm_cmdline_mode *cmdline_mode; 866 867 cmdline_mode = &fb_helper_conn->cmdline_mode; 868 869 if (cmdline_mode->bpp_specified) { 870 switch (cmdline_mode->bpp) { 871 case 8: 872 sizes.surface_depth = sizes.surface_bpp = 8; 873 break; 874 case 15: 875 sizes.surface_depth = 15; 876 sizes.surface_bpp = 16; 877 break; 878 case 16: 879 sizes.surface_depth = sizes.surface_bpp = 16; 880 break; 881 case 24: 882 sizes.surface_depth = sizes.surface_bpp = 24; 883 break; 884 case 32: 885 sizes.surface_depth = 24; 886 sizes.surface_bpp = 32; 887 break; 888 } 889 break; 890 } 891 } 892 893 crtc_count = 0; 894 for (i = 0; i < fb_helper->crtc_count; i++) { 895 struct drm_display_mode *desired_mode; 896 desired_mode = fb_helper->crtc_info[i].desired_mode; 897 898 if (desired_mode) { 899 if (gamma_size == 0) 900 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; 901 if (desired_mode->hdisplay < sizes.fb_width) 902 sizes.fb_width = desired_mode->hdisplay; 903 if (desired_mode->vdisplay < sizes.fb_height) 904 sizes.fb_height = desired_mode->vdisplay; 905 if (desired_mode->hdisplay > sizes.surface_width) 906 sizes.surface_width = desired_mode->hdisplay; 907 if (desired_mode->vdisplay > sizes.surface_height) 908 sizes.surface_height = desired_mode->vdisplay; 909 crtc_count++; 910 } 911 } 912 913 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { 914 /* hmm everyone went away - assume VGA cable just fell out 915 and will come back later. */ 916 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); 917 sizes.fb_width = sizes.surface_width = 1024; 918 sizes.fb_height = sizes.surface_height = 768; 919 } 920 921 /* push down into drivers */ 922 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); 923 if (new_fb < 0) 924 return new_fb; 925 926 info = fb_helper->fbdev; 927 928 kdev = fb_helper->dev->dev; 929 info->fb_video_dev = device_get_parent(kdev); 930 931 /* set the fb pointer */ 932 for (i = 0; i < fb_helper->crtc_count; i++) 933 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; 934 935 #if defined(__FreeBSD__) 936 if (new_fb) { 937 int ret; 938 939 info->fb_fbd_dev = device_add_child(kdev, "fbd", 940 device_get_unit(kdev)); 941 if (info->fb_fbd_dev != NULL) 942 ret = device_probe_and_attach(info->fb_fbd_dev); 943 else 944 ret = ENODEV; 945 #ifdef DEV_VT 946 if (ret != 0) 947 DRM_ERROR("Failed to attach fbd device: %d\n", ret); 948 #endif 949 } else { 950 /* Modified version of drm_fb_helper_set_par() */ 951 dev = fb_helper->dev; 952 sx_xlock(&dev->mode_config.mutex); 953 for (i = 0; i < fb_helper->crtc_count; i++) { 954 crtc = fb_helper->crtc_info[i].mode_set.crtc; 955 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set); 956 if (ret) { 957 sx_xunlock(&dev->mode_config.mutex); 958 return ret; 959 } 960 } 961 sx_xunlock(&dev->mode_config.mutex); 962 963 if (fb_helper->delayed_hotplug) { 964 fb_helper->delayed_hotplug = false; 965 drm_fb_helper_hotplug_event(fb_helper); 966 } 967 } 968 #else 969 if (new_fb) { 970 info->var.pixclock = 0; 971 if (register_framebuffer(info) < 0) 972 return -EINVAL; 973 974 dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", 975 info->node, info->fix.id); 976 977 } else { 978 drm_fb_helper_set_par(info); 979 } 980 #endif 981 982 #if 0 && defined(FREEBSD_NOTYET) 983 /* Switch back to kernel console on panic */ 984 /* multi card linked list maybe */ 985 if (list_empty(&kernel_fb_helper_list)) { 986 dev_info(fb_helper->dev->dev, "registered panic notifier\n"); 987 atomic_notifier_chain_register(&panic_notifier_list, 988 &paniced); 989 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); 990 } 991 #endif /* FREEBSD_NOTYET */ 992 if (new_fb) 993 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); 994 995 return 0; 996 } 997 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe); 998 999 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, 1000 uint32_t depth) 1001 { 1002 info->fb_stride = pitch; 1003 1004 return; 1005 } 1006 EXPORT_SYMBOL(drm_fb_helper_fill_fix); 1007 1008 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, 1009 uint32_t fb_width, uint32_t fb_height) 1010 { 1011 struct drm_framebuffer *fb = fb_helper->fb; 1012 struct vt_kms_softc *sc; 1013 1014 info->fb_name = device_get_nameunit(fb_helper->dev->dev); 1015 info->fb_width = fb->width; 1016 info->fb_height = fb->height; 1017 info->fb_depth = fb->bits_per_pixel; 1018 1019 sc = (struct vt_kms_softc *)info->fb_priv; 1020 sc->fb_helper = fb_helper; 1021 } 1022 EXPORT_SYMBOL(drm_fb_helper_fill_var); 1023 1024 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, 1025 uint32_t maxX, 1026 uint32_t maxY) 1027 { 1028 struct drm_connector *connector; 1029 int count = 0; 1030 int i; 1031 1032 for (i = 0; i < fb_helper->connector_count; i++) { 1033 connector = fb_helper->connector_info[i]->connector; 1034 count += connector->funcs->fill_modes(connector, maxX, maxY); 1035 } 1036 1037 return count; 1038 } 1039 1040 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) 1041 { 1042 struct drm_display_mode *mode; 1043 1044 list_for_each_entry(mode, &fb_connector->connector->modes, head) { 1045 if (drm_mode_width(mode) > width || 1046 drm_mode_height(mode) > height) 1047 continue; 1048 if (mode->type & DRM_MODE_TYPE_PREFERRED) 1049 return mode; 1050 } 1051 return NULL; 1052 } 1053 1054 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) 1055 { 1056 struct drm_cmdline_mode *cmdline_mode; 1057 cmdline_mode = &fb_connector->cmdline_mode; 1058 return cmdline_mode->specified; 1059 } 1060 1061 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, 1062 int width, int height) 1063 { 1064 struct drm_cmdline_mode *cmdline_mode; 1065 struct drm_display_mode *mode = NULL; 1066 1067 cmdline_mode = &fb_helper_conn->cmdline_mode; 1068 if (cmdline_mode->specified == false) 1069 return mode; 1070 1071 /* attempt to find a matching mode in the list of modes 1072 * we have gotten so far, if not add a CVT mode that conforms 1073 */ 1074 if (cmdline_mode->rb || cmdline_mode->margins) 1075 goto create_mode; 1076 1077 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { 1078 /* check width/height */ 1079 if (mode->hdisplay != cmdline_mode->xres || 1080 mode->vdisplay != cmdline_mode->yres) 1081 continue; 1082 1083 if (cmdline_mode->refresh_specified) { 1084 if (mode->vrefresh != cmdline_mode->refresh) 1085 continue; 1086 } 1087 1088 if (cmdline_mode->interlace) { 1089 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) 1090 continue; 1091 } 1092 return mode; 1093 } 1094 1095 create_mode: 1096 mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, 1097 cmdline_mode); 1098 list_add(&mode->head, &fb_helper_conn->connector->modes); 1099 return mode; 1100 } 1101 1102 static bool drm_connector_enabled(struct drm_connector *connector, bool strict) 1103 { 1104 bool enable; 1105 1106 if (strict) 1107 enable = connector->status == connector_status_connected; 1108 else 1109 enable = connector->status != connector_status_disconnected; 1110 1111 return enable; 1112 } 1113 1114 static void drm_enable_connectors(struct drm_fb_helper *fb_helper, 1115 bool *enabled) 1116 { 1117 bool any_enabled = false; 1118 struct drm_connector *connector; 1119 int i = 0; 1120 1121 for (i = 0; i < fb_helper->connector_count; i++) { 1122 connector = fb_helper->connector_info[i]->connector; 1123 enabled[i] = drm_connector_enabled(connector, true); 1124 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, 1125 enabled[i] ? "yes" : "no"); 1126 any_enabled |= enabled[i]; 1127 } 1128 1129 if (any_enabled) 1130 return; 1131 1132 for (i = 0; i < fb_helper->connector_count; i++) { 1133 connector = fb_helper->connector_info[i]->connector; 1134 enabled[i] = drm_connector_enabled(connector, false); 1135 } 1136 } 1137 1138 static bool drm_target_cloned(struct drm_fb_helper *fb_helper, 1139 struct drm_display_mode **modes, 1140 bool *enabled, int width, int height) 1141 { 1142 int count, i, j; 1143 bool can_clone = false; 1144 struct drm_fb_helper_connector *fb_helper_conn; 1145 struct drm_display_mode *dmt_mode, *mode; 1146 1147 /* only contemplate cloning in the single crtc case */ 1148 if (fb_helper->crtc_count > 1) 1149 return false; 1150 1151 count = 0; 1152 for (i = 0; i < fb_helper->connector_count; i++) { 1153 if (enabled[i]) 1154 count++; 1155 } 1156 1157 /* only contemplate cloning if more than one connector is enabled */ 1158 if (count <= 1) 1159 return false; 1160 1161 /* check the command line or if nothing common pick 1024x768 */ 1162 can_clone = true; 1163 for (i = 0; i < fb_helper->connector_count; i++) { 1164 if (!enabled[i]) 1165 continue; 1166 fb_helper_conn = fb_helper->connector_info[i]; 1167 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 1168 if (!modes[i]) { 1169 can_clone = false; 1170 break; 1171 } 1172 for (j = 0; j < i; j++) { 1173 if (!enabled[j]) 1174 continue; 1175 if (!drm_mode_equal(modes[j], modes[i])) 1176 can_clone = false; 1177 } 1178 } 1179 1180 if (can_clone) { 1181 DRM_DEBUG_KMS("can clone using command line\n"); 1182 return true; 1183 } 1184 1185 /* try and find a 1024x768 mode on each connector */ 1186 can_clone = true; 1187 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); 1188 1189 for (i = 0; i < fb_helper->connector_count; i++) { 1190 1191 if (!enabled[i]) 1192 continue; 1193 1194 fb_helper_conn = fb_helper->connector_info[i]; 1195 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { 1196 if (drm_mode_equal(mode, dmt_mode)) 1197 modes[i] = mode; 1198 } 1199 if (!modes[i]) 1200 can_clone = false; 1201 } 1202 1203 if (can_clone) { 1204 DRM_DEBUG_KMS("can clone using 1024x768\n"); 1205 return true; 1206 } 1207 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); 1208 return false; 1209 } 1210 1211 static bool drm_target_preferred(struct drm_fb_helper *fb_helper, 1212 struct drm_display_mode **modes, 1213 bool *enabled, int width, int height) 1214 { 1215 struct drm_fb_helper_connector *fb_helper_conn; 1216 int i; 1217 1218 for (i = 0; i < fb_helper->connector_count; i++) { 1219 fb_helper_conn = fb_helper->connector_info[i]; 1220 1221 if (enabled[i] == false) 1222 continue; 1223 1224 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", 1225 fb_helper_conn->connector->base.id); 1226 1227 /* got for command line mode first */ 1228 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 1229 if (!modes[i]) { 1230 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", 1231 fb_helper_conn->connector->base.id); 1232 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); 1233 } 1234 /* No preferred modes, pick one off the list */ 1235 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { 1236 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) 1237 break; 1238 } 1239 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : 1240 "none"); 1241 } 1242 return true; 1243 } 1244 1245 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, 1246 struct drm_fb_helper_crtc **best_crtcs, 1247 struct drm_display_mode **modes, 1248 int n, int width, int height) 1249 { 1250 int c, o; 1251 struct drm_device *dev = fb_helper->dev; 1252 struct drm_connector *connector; 1253 struct drm_connector_helper_funcs *connector_funcs; 1254 struct drm_encoder *encoder; 1255 struct drm_fb_helper_crtc *best_crtc; 1256 int my_score, best_score, score; 1257 struct drm_fb_helper_crtc **crtcs, *crtc; 1258 struct drm_fb_helper_connector *fb_helper_conn; 1259 1260 if (n == fb_helper->connector_count) 1261 return 0; 1262 1263 fb_helper_conn = fb_helper->connector_info[n]; 1264 connector = fb_helper_conn->connector; 1265 1266 best_crtcs[n] = NULL; 1267 best_crtc = NULL; 1268 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); 1269 if (modes[n] == NULL) 1270 return best_score; 1271 1272 crtcs = malloc(dev->mode_config.num_connector * 1273 sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 1274 if (!crtcs) 1275 return best_score; 1276 1277 my_score = 1; 1278 if (connector->status == connector_status_connected) 1279 my_score++; 1280 if (drm_has_cmdline_mode(fb_helper_conn)) 1281 my_score++; 1282 if (drm_has_preferred_mode(fb_helper_conn, width, height)) 1283 my_score++; 1284 1285 connector_funcs = connector->helper_private; 1286 encoder = connector_funcs->best_encoder(connector); 1287 if (!encoder) 1288 goto out; 1289 1290 /* select a crtc for this connector and then attempt to configure 1291 remaining connectors */ 1292 for (c = 0; c < fb_helper->crtc_count; c++) { 1293 crtc = &fb_helper->crtc_info[c]; 1294 1295 if ((encoder->possible_crtcs & (1 << c)) == 0) 1296 continue; 1297 1298 for (o = 0; o < n; o++) 1299 if (best_crtcs[o] == crtc) 1300 break; 1301 1302 if (o < n) { 1303 /* ignore cloning unless only a single crtc */ 1304 if (fb_helper->crtc_count > 1) 1305 continue; 1306 1307 if (!drm_mode_equal(modes[o], modes[n])) 1308 continue; 1309 } 1310 1311 crtcs[n] = crtc; 1312 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); 1313 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, 1314 width, height); 1315 if (score > best_score) { 1316 best_crtc = crtc; 1317 best_score = score; 1318 memcpy(best_crtcs, crtcs, 1319 dev->mode_config.num_connector * 1320 sizeof(struct drm_fb_helper_crtc *)); 1321 } 1322 } 1323 out: 1324 free(crtcs, DRM_MEM_KMS); 1325 return best_score; 1326 } 1327 1328 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) 1329 { 1330 struct drm_device *dev = fb_helper->dev; 1331 struct drm_fb_helper_crtc **crtcs; 1332 struct drm_display_mode **modes; 1333 struct drm_mode_set *modeset; 1334 bool *enabled; 1335 int width, height; 1336 int i, ret; 1337 1338 DRM_DEBUG_KMS("\n"); 1339 1340 width = dev->mode_config.max_width; 1341 height = dev->mode_config.max_height; 1342 1343 crtcs = malloc(dev->mode_config.num_connector * 1344 sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 1345 modes = malloc(dev->mode_config.num_connector * 1346 sizeof(struct drm_display_mode *), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 1347 enabled = malloc(dev->mode_config.num_connector * 1348 sizeof(bool), DRM_MEM_KMS, M_NOWAIT | M_ZERO); 1349 if (!crtcs || !modes || !enabled) { 1350 DRM_ERROR("Memory allocation failed\n"); 1351 goto out; 1352 } 1353 1354 1355 drm_enable_connectors(fb_helper, enabled); 1356 1357 ret = drm_target_cloned(fb_helper, modes, enabled, width, height); 1358 if (!ret) { 1359 ret = drm_target_preferred(fb_helper, modes, enabled, width, height); 1360 if (!ret) 1361 DRM_ERROR("Unable to find initial modes\n"); 1362 } 1363 1364 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); 1365 1366 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); 1367 1368 /* need to set the modesets up here for use later */ 1369 /* fill out the connector<->crtc mappings into the modesets */ 1370 for (i = 0; i < fb_helper->crtc_count; i++) { 1371 modeset = &fb_helper->crtc_info[i].mode_set; 1372 modeset->num_connectors = 0; 1373 } 1374 1375 for (i = 0; i < fb_helper->connector_count; i++) { 1376 struct drm_display_mode *mode = modes[i]; 1377 struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; 1378 modeset = &fb_crtc->mode_set; 1379 1380 if (mode && fb_crtc) { 1381 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", 1382 mode->name, fb_crtc->mode_set.crtc->base.id); 1383 fb_crtc->desired_mode = mode; 1384 if (modeset->mode) 1385 drm_mode_destroy(dev, modeset->mode); 1386 modeset->mode = drm_mode_duplicate(dev, 1387 fb_crtc->desired_mode); 1388 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; 1389 } 1390 } 1391 1392 out: 1393 free(crtcs, DRM_MEM_KMS); 1394 free(modes, DRM_MEM_KMS); 1395 free(enabled, DRM_MEM_KMS); 1396 } 1397 1398 /** 1399 * drm_helper_initial_config - setup a sane initial connector configuration 1400 * @fb_helper: fb_helper device struct 1401 * @bpp_sel: bpp value to use for the framebuffer configuration 1402 * 1403 * LOCKING: 1404 * Called at init time by the driver to set up the @fb_helper initial 1405 * configuration, must take the mode config lock. 1406 * 1407 * Scans the CRTCs and connectors and tries to put together an initial setup. 1408 * At the moment, this is a cloned configuration across all heads with 1409 * a new framebuffer object as the backing store. 1410 * 1411 * RETURNS: 1412 * Zero if everything went ok, nonzero otherwise. 1413 */ 1414 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) 1415 { 1416 struct drm_device *dev = fb_helper->dev; 1417 int count = 0; 1418 1419 /* disable all the possible outputs/crtcs before entering KMS mode */ 1420 drm_helper_disable_unused_functions(fb_helper->dev); 1421 1422 drm_fb_helper_parse_command_line(fb_helper); 1423 1424 count = drm_fb_helper_probe_connector_modes(fb_helper, 1425 dev->mode_config.max_width, 1426 dev->mode_config.max_height); 1427 /* 1428 * we shouldn't end up with no modes here. 1429 */ 1430 if (count == 0) 1431 dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); 1432 1433 drm_setup_crtcs(fb_helper); 1434 1435 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 1436 } 1437 EXPORT_SYMBOL(drm_fb_helper_initial_config); 1438 1439 /** 1440 * drm_fb_helper_hotplug_event - respond to a hotplug notification by 1441 * probing all the outputs attached to the fb 1442 * @fb_helper: the drm_fb_helper 1443 * 1444 * LOCKING: 1445 * Called at runtime, must take mode config lock. 1446 * 1447 * Scan the connectors attached to the fb_helper and try to put together a 1448 * setup after *notification of a change in output configuration. 1449 * 1450 * RETURNS: 1451 * 0 on success and a non-zero error code otherwise. 1452 */ 1453 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) 1454 { 1455 struct drm_device *dev = fb_helper->dev; 1456 int count = 0; 1457 u32 max_width, max_height, bpp_sel; 1458 int bound = 0, crtcs_bound = 0; 1459 struct drm_crtc *crtc; 1460 1461 if (!fb_helper->fb) 1462 return 0; 1463 1464 sx_xlock(&dev->mode_config.mutex); 1465 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 1466 if (crtc->fb) 1467 crtcs_bound++; 1468 if (crtc->fb == fb_helper->fb) 1469 bound++; 1470 } 1471 1472 if (bound < crtcs_bound) { 1473 fb_helper->delayed_hotplug = true; 1474 sx_xunlock(&dev->mode_config.mutex); 1475 return 0; 1476 } 1477 DRM_DEBUG_KMS("\n"); 1478 1479 max_width = fb_helper->fb->width; 1480 max_height = fb_helper->fb->height; 1481 bpp_sel = fb_helper->fb->bits_per_pixel; 1482 1483 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, 1484 max_height); 1485 drm_setup_crtcs(fb_helper); 1486 sx_xunlock(&dev->mode_config.mutex); 1487 1488 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 1489 } 1490 EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
Cache object: 923c38e849a1bc23a74fa2abfcb818a7
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