sys/dev/drm2/drm_fb_helper.c

   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 #include <dev/drm2/drmP.h>
  35 #include <dev/drm2/drm_crtc.h>
  36 #include <dev/drm2/drm_fb_helper.h>
  37 #include <dev/drm2/drm_crtc_helper.h>
  38
  39 #if defined(__FreeBSD__)
  40 struct vt_kms_softc {
  41         struct drm_fb_helper *fb_helper;
  42         struct task     fb_mode_task;
  43 };
  44
  45 static fb_enter_t       vt_kms_postswitch;
  46 static void vt_restore_fbdev_mode(void *, int);
  47
  48 /* Call restore out of vt(9) locks. */
  49 static void
  50 vt_restore_fbdev_mode(void *arg, int pending)
  51 {
  52         struct drm_fb_helper *fb_helper;
  53         struct vt_kms_softc *sc;
  54
  55         sc = (struct vt_kms_softc *)arg;
  56         fb_helper = sc->fb_helper;
  57         sx_xlock(&fb_helper->dev->mode_config.mutex);
  58         drm_fb_helper_restore_fbdev_mode(fb_helper);
  59         sx_xunlock(&fb_helper->dev->mode_config.mutex);
  60 }
  61
  62 static int
  63 vt_kms_postswitch(void *arg)
  64 {
  65         struct vt_kms_softc *sc;
  66
  67         sc = (struct vt_kms_softc *)arg;
  68         taskqueue_enqueue_fast(taskqueue_thread, &sc->fb_mode_task);
  69
  70         return (0);
  71 }
  72 #endif
  73
  74 static DRM_LIST_HEAD(kernel_fb_helper_list);
  75
  76 /* simple single crtc case helper function */
  77 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
  78 {
  79         struct drm_device *dev = fb_helper->dev;
  80         struct drm_connector *connector;
  81
  82         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  83                 struct drm_fb_helper_connector *fb_helper_connector;
  84
  85                 fb_helper_connector = malloc(
  86                     sizeof(struct drm_fb_helper_connector), DRM_MEM_KMS,
  87                     M_WAITOK | M_ZERO);
  88
  89                 fb_helper_connector->connector = connector;
  90                 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
  91         }
  92         return 0;
  93 }
  94
  95 const char *fb_mode_option;
  96
  97 /**
  98  * drm_fb_helper_connector_parse_command_line - parse command line for connector
  99  * @connector - connector to parse line for
 100  * @mode_option - per connector mode option
 101  *
 102  * This parses the connector specific then generic command lines for
 103  * modes and options to configure the connector.
 104  *
 105  * This uses the same parameters as the fb modedb.c, except for extra
 106  *      <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
 107  *
 108  * enable/enable Digital/disable bit at the end
 109  */
 110 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
 111                                                        const char *mode_option)
 112 {
 113         const char *name;
 114         unsigned int namelen;
 115         int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 116         unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
 117         int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
 118         int i;
 119         enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
 120         struct drm_fb_helper_cmdline_mode *cmdline_mode;
 121         struct drm_connector *connector;
 122
 123         if (!fb_helper_conn)
 124                 return false;
 125         connector = fb_helper_conn->connector;
 126
 127         cmdline_mode = &fb_helper_conn->cmdline_mode;
 128         if (!mode_option)
 129                 mode_option = fb_mode_option;
 130
 131         if (!mode_option) {
 132                 cmdline_mode->specified = false;
 133                 return false;
 134         }
 135
 136         name = mode_option;
 137         namelen = strlen(name);
 138         for (i = namelen-1; i >= 0; i--) {
 139                 switch (name[i]) {
 140                 case '@':
 141                         namelen = i;
 142                         if (!refresh_specified && !bpp_specified &&
 143                             !yres_specified) {
 144                                 refresh = strtol(&name[i+1], NULL, 10);
 145                                 refresh_specified = 1;
 146                                 if (cvt || rb)
 147                                         cvt = 0;
 148                         } else
 149                                 goto done;
 150                         break;
 151                 case '-':
 152                         namelen = i;
 153                         if (!bpp_specified && !yres_specified) {
 154                                 bpp = strtol(&name[i+1], NULL, 10);
 155                                 bpp_specified = 1;
 156                                 if (cvt || rb)
 157                                         cvt = 0;
 158                         } else
 159                                 goto done;
 160                         break;
 161                 case 'x':
 162                         if (!yres_specified) {
 163                                 yres = strtol(&name[i+1], NULL, 10);
 164                                 yres_specified = 1;
 165                         } else
 166                                 goto done;
 167                 case '0' ... '9':
 168                         break;
 169                 case 'M':
 170                         if (!yres_specified)
 171                                 cvt = 1;
 172                         break;
 173                 case 'R':
 174                         if (cvt)
 175                                 rb = 1;
 176                         break;
 177                 case 'm':
 178                         if (!cvt)
 179                                 margins = 1;
 180                         break;
 181                 case 'i':
 182                         if (!cvt)
 183                                 interlace = 1;
 184                         break;
 185                 case 'e':
 186                         force = DRM_FORCE_ON;
 187                         break;
 188                 case 'D':
 189                         if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
 190                             (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
 191                                 force = DRM_FORCE_ON;
 192                         else
 193                                 force = DRM_FORCE_ON_DIGITAL;
 194                         break;
 195                 case 'd':
 196                         force = DRM_FORCE_OFF;
 197                         break;
 198                 default:
 199                         goto done;
 200                 }
 201         }
 202         if (i < 0 && yres_specified) {
 203                 xres = strtol(name, NULL, 10);
 204                 res_specified = 1;
 205         }
 206 done:
 207
 208         DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 209                 drm_get_connector_name(connector), xres, yres,
 210                 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
 211                 "", (margins) ? " with margins" : "", (interlace) ?
 212                 " interlaced" : "");
 213
 214         if (force) {
 215                 const char *s;
 216                 switch (force) {
 217                 case DRM_FORCE_OFF: s = "OFF"; break;
 218                 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
 219                 default:
 220                 case DRM_FORCE_ON: s = "ON"; break;
 221                 }
 222
 223                 DRM_INFO("forcing %s connector %s\n",
 224                          drm_get_connector_name(connector), s);
 225                 connector->force = force;
 226         }
 227
 228         if (res_specified) {
 229                 cmdline_mode->specified = true;
 230                 cmdline_mode->xres = xres;
 231                 cmdline_mode->yres = yres;
 232         }
 233
 234         if (refresh_specified) {
 235                 cmdline_mode->refresh_specified = true;
 236                 cmdline_mode->refresh = refresh;
 237         }
 238
 239         if (bpp_specified) {
 240                 cmdline_mode->bpp_specified = true;
 241                 cmdline_mode->bpp = bpp;
 242         }
 243         cmdline_mode->rb = rb ? true : false;
 244         cmdline_mode->cvt = cvt  ? true : false;
 245         cmdline_mode->interlace = interlace ? true : false;
 246
 247         return true;
 248 }
 249
 250 static int
 251 fb_get_options(const char *connector_name, char **option)
 252 {
 253
 254         /*
 255          * TODO: store mode options pointer in ${option} for connector with
 256          * name ${connector_name}
 257          */
 258         return (1);
 259 }
 260
 261 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
 262 {
 263         struct drm_fb_helper_connector *fb_helper_conn;
 264         int i;
 265
 266         for (i = 0; i < fb_helper->connector_count; i++) {
 267                 char *option = NULL;
 268
 269                 fb_helper_conn = fb_helper->connector_info[i];
 270
 271                 /* do something on return - turn off connector maybe */
 272                 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
 273                         continue;
 274
 275                 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
 276         }
 277         return 0;
 278 }
 279
 280 #if 0
 281 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
 282 {
 283         uint16_t *r_base, *g_base, *b_base;
 284         int i;
 285
 286         r_base = crtc->gamma_store;
 287         g_base = r_base + crtc->gamma_size;
 288         b_base = g_base + crtc->gamma_size;
 289
 290         for (i = 0; i < crtc->gamma_size; i++)
 291                 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
 292 }
 293
 294 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
 295 {
 296         uint16_t *r_base, *g_base, *b_base;
 297
 298         r_base = crtc->gamma_store;
 299         g_base = r_base + crtc->gamma_size;
 300         b_base = g_base + crtc->gamma_size;
 301
 302         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
 303 }
 304 #endif
 305
 306 #if 0
 307 int drm_fb_helper_debug_enter(struct fb_info *info)
 308 {
 309         struct drm_fb_helper *helper = info->par;
 310         struct drm_crtc_helper_funcs *funcs;
 311         int i;
 312
 313         if (list_empty(&kernel_fb_helper_list))
 314                 return false;
 315
 316         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 317                 for (i = 0; i < helper->crtc_count; i++) {
 318                         struct drm_mode_set *mode_set =
 319                                 &helper->crtc_info[i].mode_set;
 320
 321                         if (!mode_set->crtc->enabled)
 322                                 continue;
 323
 324                         funcs = mode_set->crtc->helper_private;
 325                         drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
 326                         funcs->mode_set_base_atomic(mode_set->crtc,
 327                                                     mode_set->fb,
 328                                                     mode_set->x,
 329                                                     mode_set->y,
 330                                                     ENTER_ATOMIC_MODE_SET);
 331                 }
 332         }
 333
 334         return 0;
 335 }
 336 #endif
 337
 338 #if 0
 339 /* Find the real fb for a given fb helper CRTC */
 340 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
 341 {
 342         struct drm_device *dev = crtc->dev;
 343         struct drm_crtc *c;
 344
 345         list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
 346                 if (crtc->base.id == c->base.id)
 347                         return c->fb;
 348         }
 349
 350         return NULL;
 351 }
 352 #endif
 353
 354 #if 0
 355 int drm_fb_helper_debug_leave(struct fb_info *info)
 356 {
 357         struct drm_fb_helper *helper = info->par;
 358         struct drm_crtc *crtc;
 359         struct drm_crtc_helper_funcs *funcs;
 360         struct drm_framebuffer *fb;
 361         int i;
 362
 363         for (i = 0; i < helper->crtc_count; i++) {
 364                 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
 365                 crtc = mode_set->crtc;
 366                 funcs = crtc->helper_private;
 367                 fb = drm_mode_config_fb(crtc);
 368
 369                 if (!crtc->enabled)
 370                         continue;
 371
 372                 if (!fb) {
 373                         DRM_ERROR("no fb to restore??\n");
 374                         continue;
 375                 }
 376
 377                 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
 378                 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
 379                                             crtc->y, LEAVE_ATOMIC_MODE_SET);
 380         }
 381
 382         return 0;
 383 }
 384 #endif
 385
 386 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 387 {
 388         bool error = false;
 389         int i, ret;
 390         for (i = 0; i < fb_helper->crtc_count; i++) {
 391                 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
 392                 ret = drm_crtc_helper_set_config(mode_set);
 393                 if (ret)
 394                         error = true;
 395         }
 396         return error;
 397 }
 398
 399 #if 0
 400 bool drm_fb_helper_force_kernel_mode(void)
 401 {
 402         bool ret, error = false;
 403         struct drm_fb_helper *helper;
 404
 405         if (list_empty(&kernel_fb_helper_list))
 406                 return false;
 407
 408         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 409                 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 410                         continue;
 411
 412                 ret = drm_fb_helper_restore_fbdev_mode(helper);
 413                 if (ret)
 414                         error = true;
 415         }
 416         return error;
 417 }
 418 #endif
 419
 420 #if 0
 421 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
 422                         void *panic_str)
 423 {
 424         printf("panic occurred, switching back to text console\n");
 425         return drm_fb_helper_force_kernel_mode();
 426         return 0;
 427 }
 428
 429 static struct notifier_block paniced = {
 430         .notifier_call = drm_fb_helper_panic,
 431 };
 432
 433 /**
 434  * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 435  *
 436  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 437  */
 438 void drm_fb_helper_restore(void)
 439 {
 440         bool ret;
 441         ret = drm_fb_helper_force_kernel_mode();
 442         if (ret == true)
 443                 DRM_ERROR("Failed to restore crtc configuration\n");
 444 }
 445
 446 #ifdef CONFIG_MAGIC_SYSRQ
 447 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
 448 {
 449         drm_fb_helper_restore();
 450 }
 451 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
 452
 453 static void drm_fb_helper_sysrq(int dummy1)
 454 {
 455         schedule_work(&drm_fb_helper_restore_work);
 456 }
 457
 458 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
 459         .handler = drm_fb_helper_sysrq,
 460         .help_msg = "force-fb(V)",
 461         .action_msg = "Restore framebuffer console",
 462 };
 463 #else
 464 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
 465 #endif
 466 #endif
 467
 468 #if 0
 469 static void drm_fb_helper_on(struct fb_info *info)
 470 {
 471         struct drm_fb_helper *fb_helper = info->par;
 472         struct drm_device *dev = fb_helper->dev;
 473         struct drm_crtc *crtc;
 474         struct drm_crtc_helper_funcs *crtc_funcs;
 475         struct drm_connector *connector;
 476         struct drm_encoder *encoder;
 477         int i, j;
 478
 479         /*
 480          * For each CRTC in this fb, turn the crtc on then,
 481          * find all associated encoders and turn them on.
 482          */
 483         sx_xlock(&dev->mode_config.mutex);
 484         for (i = 0; i < fb_helper->crtc_count; i++) {
 485                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 486                 crtc_funcs = crtc->helper_private;
 487
 488                 if (!crtc->enabled)
 489                         continue;
 490
 491                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 492
 493                 /* Walk the connectors & encoders on this fb turning them on */
 494                 for (j = 0; j < fb_helper->connector_count; j++) {
 495                         connector = fb_helper->connector_info[j]->connector;
 496                         connector->dpms = DRM_MODE_DPMS_ON;
 497                         drm_connector_property_set_value(connector,
 498                                                          dev->mode_config.dpms_property,
 499                                                          DRM_MODE_DPMS_ON);
 500                 }
 501                 /* Found a CRTC on this fb, now find encoders */
 502                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 503                         if (encoder->crtc == crtc) {
 504                                 struct drm_encoder_helper_funcs *encoder_funcs;
 505
 506                                 encoder_funcs = encoder->helper_private;
 507                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 508                         }
 509                 }
 510         }
 511         sx_xunlock(&dev->mode_config.mutex);
 512 }
 513 #endif
 514
 515 #if 0
 516 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
 517 {
 518         struct drm_fb_helper *fb_helper = info->par;
 519         struct drm_device *dev = fb_helper->dev;
 520         struct drm_crtc *crtc;
 521         struct drm_crtc_helper_funcs *crtc_funcs;
 522         struct drm_connector *connector;
 523         struct drm_encoder *encoder;
 524         int i, j;
 525
 526         /*
 527          * For each CRTC in this fb, find all associated encoders
 528          * and turn them off, then turn off the CRTC.
 529          */
 530         sx_xlock(&dev->mode_config.mutex);
 531         for (i = 0; i < fb_helper->crtc_count; i++) {
 532                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 533                 crtc_funcs = crtc->helper_private;
 534
 535                 if (!crtc->enabled)
 536                         continue;
 537
 538                 /* Walk the connectors on this fb and mark them off */
 539                 for (j = 0; j < fb_helper->connector_count; j++) {
 540                         connector = fb_helper->connector_info[j]->connector;
 541                         connector->dpms = dpms_mode;
 542                         drm_connector_property_set_value(connector,
 543                                                          dev->mode_config.dpms_property,
 544                                                          dpms_mode);
 545                 }
 546                 /* Found a CRTC on this fb, now find encoders */
 547                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 548                         if (encoder->crtc == crtc) {
 549                                 struct drm_encoder_helper_funcs *encoder_funcs;
 550
 551                                 encoder_funcs = encoder->helper_private;
 552                                 encoder_funcs->dpms(encoder, dpms_mode);
 553                         }
 554                 }
 555                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 556         }
 557         sx_xunlock(&dev->mode_config.mutex);
 558 }
 559 #endif
 560
 561 #if 0
 562 int drm_fb_helper_blank(int blank, struct fb_info *info)
 563 {
 564         switch (blank) {
 565         /* Display: On; HSync: On, VSync: On */
 566         case FB_BLANK_UNBLANK:
 567                 drm_fb_helper_on(info);
 568                 break;
 569         /* Display: Off; HSync: On, VSync: On */
 570         case FB_BLANK_NORMAL:
 571                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 572                 break;
 573         /* Display: Off; HSync: Off, VSync: On */
 574         case FB_BLANK_HSYNC_SUSPEND:
 575                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 576                 break;
 577         /* Display: Off; HSync: On, VSync: Off */
 578         case FB_BLANK_VSYNC_SUSPEND:
 579                 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
 580                 break;
 581         /* Display: Off; HSync: Off, VSync: Off */
 582         case FB_BLANK_POWERDOWN:
 583                 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
 584                 break;
 585         }
 586         return 0;
 587 }
 588 #endif
 589
 590 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
 591 {
 592         int i;
 593
 594         for (i = 0; i < helper->connector_count; i++)
 595                 free(helper->connector_info[i], DRM_MEM_KMS);
 596         free(helper->connector_info, DRM_MEM_KMS);
 597         for (i = 0; i < helper->crtc_count; i++) {
 598                 free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS);
 599                 if (helper->crtc_info[i].mode_set.mode)
 600                         drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
 601         }
 602         free(helper->crtc_info, DRM_MEM_KMS);
 603 }
 604
 605 int drm_fb_helper_init(struct drm_device *dev,
 606                        struct drm_fb_helper *fb_helper,
 607                        int crtc_count, int max_conn_count)
 608 {
 609         struct drm_crtc *crtc;
 610         int i;
 611
 612         fb_helper->dev = dev;
 613
 614         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 615
 616         fb_helper->crtc_info = malloc(crtc_count *
 617             sizeof(struct drm_fb_helper_crtc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 618
 619         fb_helper->crtc_count = crtc_count;
 620         fb_helper->connector_info = malloc(dev->mode_config.num_connector *
 621             sizeof(struct drm_fb_helper_connector *), DRM_MEM_KMS,
 622             M_WAITOK | M_ZERO);
 623         fb_helper->connector_count = 0;
 624
 625         for (i = 0; i < crtc_count; i++) {
 626                 fb_helper->crtc_info[i].mode_set.connectors =
 627                         malloc(max_conn_count * sizeof(struct drm_connector *),
 628                             DRM_MEM_KMS, M_WAITOK | M_ZERO);
 629
 630                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 631         }
 632
 633         i = 0;
 634         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 635                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 636                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 637                 i++;
 638         }
 639         fb_helper->conn_limit = max_conn_count;
 640         return 0;
 641 }
 642
 643 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 644 {
 645         if (!list_empty(&fb_helper->kernel_fb_list)) {
 646                 list_del(&fb_helper->kernel_fb_list);
 647                 if (list_empty(&kernel_fb_helper_list)) {
 648 #if 0
 649                         printk(KERN_INFO "drm: unregistered panic notifier\n");
 650                         atomic_notifier_chain_unregister(&panic_notifier_list,
 651                                                          &paniced);
 652                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 653 #endif
 654                 }
 655         }
 656
 657         drm_fb_helper_crtc_free(fb_helper);
 658
 659 }
 660
 661 #if 0
 662 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 663                      u16 blue, u16 regno, struct fb_info *info)
 664 {
 665         struct drm_fb_helper *fb_helper = info->par;
 666         struct drm_framebuffer *fb = fb_helper->fb;
 667         int pindex;
 668
 669         if (info->fix.visual == FB_VISUAL_trueCOLOR) {
 670                 u32 *palette;
 671                 u32 value;
 672                 /* place color in psuedopalette */
 673                 if (regno > 16)
 674                         return -EINVAL;
 675                 palette = (u32 *)info->pseudo_palette;
 676                 red >>= (16 - info->var.red.length);
 677                 green >>= (16 - info->var.green.length);
 678                 blue >>= (16 - info->var.blue.length);
 679                 value = (red << info->var.red.offset) |
 680                         (green << info->var.green.offset) |
 681                         (blue << info->var.blue.offset);
 682                 if (info->var.transp.length > 0) {
 683                         u32 mask = (1 << info->var.transp.length) - 1;
 684                         mask <<= info->var.transp.offset;
 685                         value |= mask;
 686                 }
 687                 palette[regno] = value;
 688                 return 0;
 689         }
 690
 691         pindex = regno;
 692
 693         if (fb->bits_per_pixel == 16) {
 694                 pindex = regno << 3;
 695
 696                 if (fb->depth == 16 && regno > 63)
 697                         return -EINVAL;
 698                 if (fb->depth == 15 && regno > 31)
 699                         return -EINVAL;
 700
 701                 if (fb->depth == 16) {
 702                         u16 r, g, b;
 703                         int i;
 704                         if (regno < 32) {
 705                                 for (i = 0; i < 8; i++)
 706                                         fb_helper->funcs->gamma_set(crtc, red,
 707                                                 green, blue, pindex + i);
 708                         }
 709
 710                         fb_helper->funcs->gamma_get(crtc, &r,
 711                                                     &g, &b,
 712                                                     pindex >> 1);
 713
 714                         for (i = 0; i < 4; i++)
 715                                 fb_helper->funcs->gamma_set(crtc, r,
 716                                                             green, b,
 717                                                             (pindex >> 1) + i);
 718                 }
 719         }
 720
 721         if (fb->depth != 16)
 722                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 723         return 0;
 724 }
 725 #endif
 726
 727 #if 0
 728 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 729 {
 730         struct drm_fb_helper *fb_helper = info->par;
 731         struct drm_crtc_helper_funcs *crtc_funcs;
 732         u16 *red, *green, *blue, *transp;
 733         struct drm_crtc *crtc;
 734         int i, j, rc = 0;
 735         int start;
 736
 737         for (i = 0; i < fb_helper->crtc_count; i++) {
 738                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 739                 crtc_funcs = crtc->helper_private;
 740
 741                 red = cmap->red;
 742                 green = cmap->green;
 743                 blue = cmap->blue;
 744                 transp = cmap->transp;
 745                 start = cmap->start;
 746
 747                 for (j = 0; j < cmap->len; j++) {
 748                         u16 hred, hgreen, hblue, htransp = 0xffff;
 749
 750                         hred = *red++;
 751                         hgreen = *green++;
 752                         hblue = *blue++;
 753
 754                         if (transp)
 755                                 htransp = *transp++;
 756
 757                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 758                         if (rc)
 759                                 return rc;
 760                 }
 761                 crtc_funcs->load_lut(crtc);
 762         }
 763         return rc;
 764 }
 765 #endif
 766
 767 #if 0
 768 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 769                             struct fb_info *info)
 770 {
 771         struct drm_fb_helper *fb_helper = info->par;
 772         struct drm_framebuffer *fb = fb_helper->fb;
 773         int depth;
 774
 775         if (var->pixclock != 0 || in_dbg_master())
 776                 return -EINVAL;
 777
 778         /* Need to resize the fb object !!! */
 779         if (var->bits_per_pixel > fb->bits_per_pixel ||
 780             var->xres > fb->width || var->yres > fb->height ||
 781             var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
 782                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 783                           "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
 784                           var->xres, var->yres, var->bits_per_pixel,
 785                           var->xres_virtual, var->yres_virtual,
 786                           fb->width, fb->height, fb->bits_per_pixel);
 787                 return -EINVAL;
 788         }
 789
 790         switch (var->bits_per_pixel) {
 791         case 16:
 792                 depth = (var->green.length == 6) ? 16 : 15;
 793                 break;
 794         case 32:
 795                 depth = (var->transp.length > 0) ? 32 : 24;
 796                 break;
 797         default:
 798                 depth = var->bits_per_pixel;
 799                 break;
 800         }
 801
 802         switch (depth) {
 803         case 8:
 804                 var->red.offset = 0;
 805                 var->green.offset = 0;
 806                 var->blue.offset = 0;
 807                 var->red.length = 8;
 808                 var->green.length = 8;
 809                 var->blue.length = 8;
 810                 var->transp.length = 0;
 811                 var->transp.offset = 0;
 812                 break;
 813         case 15:
 814                 var->red.offset = 10;
 815                 var->green.offset = 5;
 816                 var->blue.offset = 0;
 817                 var->red.length = 5;
 818                 var->green.length = 5;
 819                 var->blue.length = 5;
 820                 var->transp.length = 1;
 821                 var->transp.offset = 15;
 822                 break;
 823         case 16:
 824                 var->red.offset = 11;
 825                 var->green.offset = 5;
 826                 var->blue.offset = 0;
 827                 var->red.length = 5;
 828                 var->green.length = 6;
 829                 var->blue.length = 5;
 830                 var->transp.length = 0;
 831                 var->transp.offset = 0;
 832                 break;
 833         case 24:
 834                 var->red.offset = 16;
 835                 var->green.offset = 8;
 836                 var->blue.offset = 0;
 837                 var->red.length = 8;
 838                 var->green.length = 8;
 839                 var->blue.length = 8;
 840                 var->transp.length = 0;
 841                 var->transp.offset = 0;
 842                 break;
 843         case 32:
 844                 var->red.offset = 16;
 845                 var->green.offset = 8;
 846                 var->blue.offset = 0;
 847                 var->red.length = 8;
 848                 var->green.length = 8;
 849                 var->blue.length = 8;
 850                 var->transp.length = 8;
 851                 var->transp.offset = 24;
 852                 break;
 853         default:
 854                 return -EINVAL;
 855         }
 856         return 0;
 857 }
 858 #endif
 859
 860 #if 0
 861 /* this will let fbcon do the mode init */
 862 int drm_fb_helper_set_par(struct fb_info *info)
 863 {
 864         struct drm_fb_helper *fb_helper = info->par;
 865         struct drm_device *dev = fb_helper->dev;
 866         struct fb_var_screeninfo *var = &info->var;
 867         struct drm_crtc *crtc;
 868         int ret;
 869         int i;
 870
 871         if (var->pixclock != 0) {
 872                 DRM_ERROR("PIXEL CLOCK SET\n");
 873                 return -EINVAL;
 874         }
 875
 876         mutex_lock(&dev->mode_config.mutex);
 877         for (i = 0; i < fb_helper->crtc_count; i++) {
 878                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 879                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 880                 if (ret) {
 881                         mutex_unlock(&dev->mode_config.mutex);
 882                         return ret;
 883                 }
 884         }
 885         mutex_unlock(&dev->mode_config.mutex);
 886
 887         if (fb_helper->delayed_hotplug) {
 888                 fb_helper->delayed_hotplug = false;
 889                 drm_fb_helper_hotplug_event(fb_helper);
 890         }
 891         return 0;
 892 }
 893 #endif
 894
 895 #if 0
 896 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 897                               struct fb_info *info)
 898 {
 899         struct drm_fb_helper *fb_helper = info->par;
 900         struct drm_device *dev = fb_helper->dev;
 901         struct drm_mode_set *modeset;
 902         struct drm_crtc *crtc;
 903         int ret = 0;
 904         int i;
 905
 906         mutex_lock(&dev->mode_config.mutex);
 907         for (i = 0; i < fb_helper->crtc_count; i++) {
 908                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 909
 910                 modeset = &fb_helper->crtc_info[i].mode_set;
 911
 912                 modeset->x = var->xoffset;
 913                 modeset->y = var->yoffset;
 914
 915                 if (modeset->num_connectors) {
 916                         ret = crtc->funcs->set_config(modeset);
 917                         if (!ret) {
 918                                 info->var.xoffset = var->xoffset;
 919                                 info->var.yoffset = var->yoffset;
 920                         }
 921                 }
 922         }
 923         mutex_unlock(&dev->mode_config.mutex);
 924         return ret;
 925 }
 926 #endif
 927
 928 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 929                                   int preferred_bpp)
 930 {
 931         int new_fb = 0;
 932         int crtc_count = 0;
 933         int i;
 934         struct fb_info *info;
 935         struct drm_fb_helper_surface_size sizes;
 936         int gamma_size = 0;
 937 #if defined(__FreeBSD__)
 938         struct vt_kms_softc *sc;
 939         device_t kdev;
 940 #endif
 941
 942         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 943         sizes.surface_depth = 24;
 944         sizes.surface_bpp = 32;
 945         sizes.fb_width = (unsigned)-1;
 946         sizes.fb_height = (unsigned)-1;
 947
 948         /* if driver picks 8 or 16 by default use that
 949            for both depth/bpp */
 950         if (preferred_bpp != sizes.surface_bpp) {
 951                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 952         }
 953         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 954         for (i = 0; i < fb_helper->connector_count; i++) {
 955                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 956                 struct drm_fb_helper_cmdline_mode *cmdline_mode;
 957
 958                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 959
 960                 if (cmdline_mode->bpp_specified) {
 961                         switch (cmdline_mode->bpp) {
 962                         case 8:
 963                                 sizes.surface_depth = sizes.surface_bpp = 8;
 964                                 break;
 965                         case 15:
 966                                 sizes.surface_depth = 15;
 967                                 sizes.surface_bpp = 16;
 968                                 break;
 969                         case 16:
 970                                 sizes.surface_depth = sizes.surface_bpp = 16;
 971                                 break;
 972                         case 24:
 973                                 sizes.surface_depth = sizes.surface_bpp = 24;
 974                                 break;
 975                         case 32:
 976                                 sizes.surface_depth = 24;
 977                                 sizes.surface_bpp = 32;
 978                                 break;
 979                         }
 980                         break;
 981                 }
 982         }
 983
 984         crtc_count = 0;
 985         for (i = 0; i < fb_helper->crtc_count; i++) {
 986                 struct drm_display_mode *desired_mode;
 987                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 988
 989                 if (desired_mode) {
 990                         if (gamma_size == 0)
 991                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 992                         if (desired_mode->hdisplay < sizes.fb_width)
 993                                 sizes.fb_width = desired_mode->hdisplay;
 994                         if (desired_mode->vdisplay < sizes.fb_height)
 995                                 sizes.fb_height = desired_mode->vdisplay;
 996                         if (desired_mode->hdisplay > sizes.surface_width)
 997                                 sizes.surface_width = desired_mode->hdisplay;
 998                         if (desired_mode->vdisplay > sizes.surface_height)
 999                                 sizes.surface_height = desired_mode->vdisplay;
1000                         crtc_count++;
1001                 }
1002         }
1003
1004         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
1005                 /* hmm everyone went away - assume VGA cable just fell out
1006                    and will come back later. */
1007                 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
1008                 sizes.fb_width = sizes.surface_width = 1024;
1009                 sizes.fb_height = sizes.surface_height = 768;
1010         }
1011
1012         /* push down into drivers */
1013         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
1014         if (new_fb < 0)
1015                 return new_fb;
1016
1017 #if defined(__FreeBSD__)
1018         sc = malloc(sizeof(struct vt_kms_softc), DRM_MEM_KMS,
1019             M_WAITOK | M_ZERO);
1020         sc->fb_helper = fb_helper;
1021         TASK_INIT(&sc->fb_mode_task, 0, vt_restore_fbdev_mode, sc);
1022
1023         info = fb_helper->fbdev;
1024
1025         info->fb_name = device_get_nameunit(fb_helper->dev->device);
1026         info->fb_depth = fb_helper->fb->bits_per_pixel;
1027         info->fb_height = fb_helper->fb->height;
1028         info->fb_width = fb_helper->fb->width;
1029         info->fb_stride = fb_helper->fb->pitches[0];
1030         info->fb_priv = sc;
1031         info->enter = &vt_kms_postswitch;
1032 #endif
1033
1034         /* set the fb pointer */
1035         for (i = 0; i < fb_helper->crtc_count; i++) {
1036                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
1037         }
1038
1039 #if defined(__FreeBSD__)
1040         if (new_fb) {
1041                 device_t fbd;
1042                 int ret;
1043
1044                 kdev = fb_helper->dev->device;
1045                 fbd = device_add_child(kdev, "fbd", device_get_unit(kdev));
1046                 ret = device_probe_and_attach(fbd);
1047                 if (ret != 0)
1048                         DRM_ERROR("Failed to attach fbd device: %d\n", ret);
1049         }
1050 #else
1051         if (new_fb) {
1052                 info->var.pixclock = 0;
1053                 if (register_framebuffer(info) < 0) {
1054                         return -EINVAL;
1055                 }
1056
1057                 printf("fb%d: %s frame buffer device\n", info->node,
1058                        info->fix.id);
1059
1060         } else {
1061                 drm_fb_helper_set_par(info);
1062         }
1063
1064         /* Switch back to kernel console on panic */
1065         /* multi card linked list maybe */
1066         if (list_empty(&kernel_fb_helper_list)) {
1067                 printf("drm: registered panic notifier\n");
1068                 atomic_notifier_chain_register(&panic_notifier_list,
1069                                                &paniced);
1070         }
1071         if (new_fb)
1072                 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
1073 #endif
1074         return 0;
1075 }
1076
1077 #if 0
1078 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
1079                             uint32_t depth)
1080 {
1081         info->fix.type = FB_TYPE_PACKED_PIXELS;
1082         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1083                 FB_VISUAL_trueCOLOR;
1084         info->fix.mmio_start = 0;
1085         info->fix.mmio_len = 0;
1086         info->fix.type_aux = 0;
1087         info->fix.xpanstep = 1; /* doing it in hw */
1088         info->fix.ypanstep = 1; /* doing it in hw */
1089         info->fix.ywrapstep = 0;
1090         info->fix.accel = FB_ACCEL_NONE;
1091         info->fix.type_aux = 0;
1092
1093         info->fix.line_length = pitch;
1094         return;
1095 }
1096
1097 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1098                             uint32_t fb_width, uint32_t fb_height)
1099 {
1100         struct drm_framebuffer *fb = fb_helper->fb;
1101         info->pseudo_palette = fb_helper->pseudo_palette;
1102         info->var.xres_virtual = fb->width;
1103         info->var.yres_virtual = fb->height;
1104         info->var.bits_per_pixel = fb->bits_per_pixel;
1105         info->var.accel_flags = FB_ACCELF_TEXT;
1106         info->var.xoffset = 0;
1107         info->var.yoffset = 0;
1108         info->var.activate = FB_ACTIVATE_NOW;
1109         info->var.height = -1;
1110         info->var.width = -1;
1111
1112         switch (fb->depth) {
1113         case 8:
1114                 info->var.red.offset = 0;
1115                 info->var.green.offset = 0;
1116                 info->var.blue.offset = 0;
1117                 info->var.red.length = 8; /* 8bit DAC */
1118                 info->var.green.length = 8;
1119                 info->var.blue.length = 8;
1120                 info->var.transp.offset = 0;
1121                 info->var.transp.length = 0;
1122                 break;
1123         case 15:
1124                 info->var.red.offset = 10;
1125                 info->var.green.offset = 5;
1126                 info->var.blue.offset = 0;
1127                 info->var.red.length = 5;
1128                 info->var.green.length = 5;
1129                 info->var.blue.length = 5;
1130                 info->var.transp.offset = 15;
1131                 info->var.transp.length = 1;
1132                 break;
1133         case 16:
1134                 info->var.red.offset = 11;
1135                 info->var.green.offset = 5;
1136                 info->var.blue.offset = 0;
1137                 info->var.red.length = 5;
1138                 info->var.green.length = 6;
1139                 info->var.blue.length = 5;
1140                 info->var.transp.offset = 0;
1141                 break;
1142         case 24:
1143                 info->var.red.offset = 16;
1144                 info->var.green.offset = 8;
1145                 info->var.blue.offset = 0;
1146                 info->var.red.length = 8;
1147                 info->var.green.length = 8;
1148                 info->var.blue.length = 8;
1149                 info->var.transp.offset = 0;
1150                 info->var.transp.length = 0;
1151                 break;
1152         case 32:
1153                 info->var.red.offset = 16;
1154                 info->var.green.offset = 8;
1155                 info->var.blue.offset = 0;
1156                 info->var.red.length = 8;
1157                 info->var.green.length = 8;
1158                 info->var.blue.length = 8;
1159                 info->var.transp.offset = 24;
1160                 info->var.transp.length = 8;
1161                 break;
1162         default:
1163                 break;
1164         }
1165
1166         info->var.xres = fb_width;
1167         info->var.yres = fb_height;
1168 }
1169 #endif
1170
1171 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1172                                                uint32_t maxX,
1173                                                uint32_t maxY)
1174 {
1175         struct drm_connector *connector;
1176         int count = 0;
1177         int i;
1178
1179         for (i = 0; i < fb_helper->connector_count; i++) {
1180                 connector = fb_helper->connector_info[i]->connector;
1181                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1182         }
1183
1184         return count;
1185 }
1186
1187 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1188 {
1189         struct drm_display_mode *mode;
1190
1191         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1192                 if (drm_mode_width(mode) > width ||
1193                     drm_mode_height(mode) > height)
1194                         continue;
1195                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1196                         return mode;
1197         }
1198         return NULL;
1199 }
1200
1201 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1202 {
1203         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1204         cmdline_mode = &fb_connector->cmdline_mode;
1205         return cmdline_mode->specified;
1206 }
1207
1208 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1209                                                       int width, int height)
1210 {
1211         struct drm_cmdline_mode *cmdline_mode;
1212         struct drm_display_mode *mode = NULL;
1213
1214         cmdline_mode = &fb_helper_conn->cmdline_mode1;
1215         if (cmdline_mode->specified == false &&
1216             !drm_fetch_cmdline_mode_from_kenv(fb_helper_conn->connector,
1217             cmdline_mode))
1218                         return (NULL);
1219
1220         /* attempt to find a matching mode in the list of modes
1221          *  we have gotten so far, if not add a CVT mode that conforms
1222          */
1223         if (cmdline_mode->rb || cmdline_mode->margins)
1224                 goto create_mode;
1225
1226         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1227                 /* check width/height */
1228                 if (mode->hdisplay != cmdline_mode->xres ||
1229                     mode->vdisplay != cmdline_mode->yres)
1230                         continue;
1231
1232                 if (cmdline_mode->refresh_specified) {
1233                         if (mode->vrefresh != cmdline_mode->refresh)
1234                                 continue;
1235                 }
1236
1237                 if (cmdline_mode->interlace) {
1238                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1239                                 continue;
1240                 }
1241                 return mode;
1242         }
1243
1244 create_mode:
1245         if (cmdline_mode->cvt)
1246                 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1247                                     cmdline_mode->xres, cmdline_mode->yres,
1248                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1249                                     cmdline_mode->rb, cmdline_mode->interlace,
1250                                     cmdline_mode->margins);
1251         else
1252                 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1253                                     cmdline_mode->xres, cmdline_mode->yres,
1254                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1255                                     cmdline_mode->interlace,
1256                                     cmdline_mode->margins);
1257         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1258         list_add(&mode->head, &fb_helper_conn->connector->modes);
1259         return mode;
1260 }
1261
1262 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1263 {
1264         bool enable;
1265
1266         if (strict) {
1267                 enable = connector->status == connector_status_connected;
1268         } else {
1269                 enable = connector->status != connector_status_disconnected;
1270         }
1271         return enable;
1272 }
1273
1274 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1275                                   bool *enabled)
1276 {
1277         bool any_enabled = false;
1278         struct drm_connector *connector;
1279         int i = 0;
1280
1281         for (i = 0; i < fb_helper->connector_count; i++) {
1282                 connector = fb_helper->connector_info[i]->connector;
1283                 enabled[i] = drm_connector_enabled(connector, true);
1284                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1285                           enabled[i] ? "yes" : "no");
1286                 any_enabled |= enabled[i];
1287         }
1288
1289         if (any_enabled)
1290                 return;
1291
1292         for (i = 0; i < fb_helper->connector_count; i++) {
1293                 connector = fb_helper->connector_info[i]->connector;
1294                 enabled[i] = drm_connector_enabled(connector, false);
1295         }
1296 }
1297
1298 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1299                               struct drm_display_mode **modes,
1300                               bool *enabled, int width, int height)
1301 {
1302         int count, i, j;
1303         bool can_clone = false;
1304         struct drm_fb_helper_connector *fb_helper_conn;
1305         struct drm_display_mode *dmt_mode, *mode;
1306
1307         /* only contemplate cloning in the single crtc case */
1308         if (fb_helper->crtc_count > 1)
1309                 return false;
1310
1311         count = 0;
1312         for (i = 0; i < fb_helper->connector_count; i++) {
1313                 if (enabled[i])
1314                         count++;
1315         }
1316
1317         /* only contemplate cloning if more than one connector is enabled */
1318         if (count <= 1)
1319                 return false;
1320
1321         /* check the command line or if nothing common pick 1024x768 */
1322         can_clone = true;
1323         for (i = 0; i < fb_helper->connector_count; i++) {
1324                 if (!enabled[i])
1325                         continue;
1326                 fb_helper_conn = fb_helper->connector_info[i];
1327                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1328                 if (!modes[i]) {
1329                         can_clone = false;
1330                         break;
1331                 }
1332                 for (j = 0; j < i; j++) {
1333                         if (!enabled[j])
1334                                 continue;
1335                         if (!drm_mode_equal(modes[j], modes[i]))
1336                                 can_clone = false;
1337                 }
1338         }
1339
1340         if (can_clone) {
1341                 DRM_DEBUG_KMS("can clone using command line\n");
1342                 return true;
1343         }
1344
1345         /* try and find a 1024x768 mode on each connector */
1346         can_clone = true;
1347         dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1348
1349         for (i = 0; i < fb_helper->connector_count; i++) {
1350
1351                 if (!enabled[i])
1352                         continue;
1353
1354                 fb_helper_conn = fb_helper->connector_info[i];
1355                 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1356                         if (drm_mode_equal(mode, dmt_mode))
1357                                 modes[i] = mode;
1358                 }
1359                 if (!modes[i])
1360                         can_clone = false;
1361         }
1362
1363         if (can_clone) {
1364                 DRM_DEBUG_KMS("can clone using 1024x768\n");
1365                 return true;
1366         }
1367         DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1368         return false;
1369 }
1370
1371 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1372                                  struct drm_display_mode **modes,
1373                                  bool *enabled, int width, int height)
1374 {
1375         struct drm_fb_helper_connector *fb_helper_conn;
1376         int i;
1377
1378         for (i = 0; i < fb_helper->connector_count; i++) {
1379                 fb_helper_conn = fb_helper->connector_info[i];
1380
1381                 if (enabled[i] == false)
1382                         continue;
1383
1384                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1385                               fb_helper_conn->connector->base.id);
1386
1387                 /* got for command line mode first */
1388                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1389                 if (!modes[i]) {
1390                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1391                                       fb_helper_conn->connector->base.id);
1392                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1393                 }
1394                 /* No preferred modes, pick one off the list */
1395                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1396                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1397                                 break;
1398                 }
1399                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1400                           "none");
1401         }
1402         return true;
1403 }
1404
1405 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1406                           struct drm_fb_helper_crtc **best_crtcs,
1407                           struct drm_display_mode **modes,
1408                           int n, int width, int height)
1409 {
1410         int c, o;
1411         struct drm_device *dev = fb_helper->dev;
1412         struct drm_connector *connector;
1413         struct drm_connector_helper_funcs *connector_funcs;
1414         struct drm_encoder *encoder;
1415         struct drm_fb_helper_crtc *best_crtc;
1416         int my_score, best_score, score;
1417         struct drm_fb_helper_crtc **crtcs, *crtc;
1418         struct drm_fb_helper_connector *fb_helper_conn;
1419
1420         if (n == fb_helper->connector_count)
1421                 return 0;
1422
1423         fb_helper_conn = fb_helper->connector_info[n];
1424         connector = fb_helper_conn->connector;
1425
1426         best_crtcs[n] = NULL;
1427         best_crtc = NULL;
1428         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1429         if (modes[n] == NULL)
1430                 return best_score;
1431
1432         crtcs = malloc(dev->mode_config.num_connector *
1433             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1434             M_WAITOK | M_ZERO);
1435
1436         my_score = 1;
1437         if (connector->status == connector_status_connected)
1438                 my_score++;
1439         if (drm_has_cmdline_mode(fb_helper_conn))
1440                 my_score++;
1441         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1442                 my_score++;
1443
1444         connector_funcs = connector->helper_private;
1445         encoder = connector_funcs->best_encoder(connector);
1446         if (!encoder)
1447                 goto out;
1448
1449         /* select a crtc for this connector and then attempt to configure
1450            remaining connectors */
1451         for (c = 0; c < fb_helper->crtc_count; c++) {
1452                 crtc = &fb_helper->crtc_info[c];
1453
1454                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1455                         continue;
1456                 }
1457
1458                 for (o = 0; o < n; o++)
1459                         if (best_crtcs[o] == crtc)
1460                                 break;
1461
1462                 if (o < n) {
1463                         /* ignore cloning unless only a single crtc */
1464                         if (fb_helper->crtc_count > 1)
1465                                 continue;
1466
1467                         if (!drm_mode_equal(modes[o], modes[n]))
1468                                 continue;
1469                 }
1470
1471                 crtcs[n] = crtc;
1472                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1473                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1474                                                   width, height);
1475                 if (score > best_score) {
1476                         best_crtc = crtc;
1477                         best_score = score;
1478                         memcpy(best_crtcs, crtcs,
1479                                dev->mode_config.num_connector *
1480                                sizeof(struct drm_fb_helper_crtc *));
1481                 }
1482         }
1483 out:
1484         free(crtcs, DRM_MEM_KMS);
1485         return best_score;
1486 }
1487
1488 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1489 {
1490         struct drm_device *dev = fb_helper->dev;
1491         struct drm_fb_helper_crtc **crtcs;
1492         struct drm_display_mode **modes;
1493         struct drm_encoder *encoder;
1494         struct drm_mode_set *modeset;
1495         bool *enabled;
1496         int width, height;
1497         int i, ret;
1498
1499         DRM_DEBUG_KMS("\n");
1500
1501         width = dev->mode_config.max_width;
1502         height = dev->mode_config.max_height;
1503
1504         /* clean out all the encoder/crtc combos */
1505         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1506                 encoder->crtc = NULL;
1507         }
1508
1509         crtcs = malloc(dev->mode_config.num_connector *
1510             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1511             M_WAITOK | M_ZERO);
1512         modes = malloc(dev->mode_config.num_connector *
1513             sizeof(struct drm_display_mode *), DRM_MEM_KMS,
1514             M_WAITOK | M_ZERO);
1515         enabled = malloc(dev->mode_config.num_connector *
1516             sizeof(bool), DRM_MEM_KMS, M_WAITOK | M_ZERO);
1517
1518         drm_enable_connectors(fb_helper, enabled);
1519
1520         ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1521         if (!ret) {
1522                 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1523                 if (!ret)
1524                         DRM_ERROR("Unable to find initial modes\n");
1525         }
1526
1527         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1528
1529         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1530
1531         /* need to set the modesets up here for use later */
1532         /* fill out the connector<->crtc mappings into the modesets */
1533         for (i = 0; i < fb_helper->crtc_count; i++) {
1534                 modeset = &fb_helper->crtc_info[i].mode_set;
1535                 modeset->num_connectors = 0;
1536         }
1537
1538         for (i = 0; i < fb_helper->connector_count; i++) {
1539                 struct drm_display_mode *mode = modes[i];
1540                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1541                 modeset = &fb_crtc->mode_set;
1542
1543                 if (mode && fb_crtc) {
1544                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1545                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1546                         fb_crtc->desired_mode = mode;
1547                         if (modeset->mode)
1548                                 drm_mode_destroy(dev, modeset->mode);
1549                         modeset->mode = drm_mode_duplicate(dev,
1550                                                            fb_crtc->desired_mode);
1551                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1552                 }
1553         }
1554
1555         free(crtcs, DRM_MEM_KMS);
1556         free(modes, DRM_MEM_KMS);
1557         free(enabled, DRM_MEM_KMS);
1558 }
1559
1560 /**
1561  * drm_helper_initial_config - setup a sane initial connector configuration
1562  * @dev: DRM device
1563  *
1564  * LOCKING:
1565  * Called at init time, must take mode config lock.
1566  *
1567  * Scan the CRTCs and connectors and try to put together an initial setup.
1568  * At the moment, this is a cloned configuration across all heads with
1569  * a new framebuffer object as the backing store.
1570  *
1571  * RETURNS:
1572  * Zero if everything went ok, nonzero otherwise.
1573  */
1574 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1575 {
1576         struct drm_device *dev = fb_helper->dev;
1577         int count = 0;
1578
1579         /* disable all the possible outputs/crtcs before entering KMS mode */
1580         drm_helper_disable_unused_functions(fb_helper->dev);
1581
1582         drm_fb_helper_parse_command_line(fb_helper);
1583
1584         count = drm_fb_helper_probe_connector_modes(fb_helper,
1585                                                     dev->mode_config.max_width,
1586                                                     dev->mode_config.max_height);
1587         /*
1588          * we shouldn't end up with no modes here.
1589          */
1590         if (count == 0) {
1591                 printf("No connectors reported connected with modes\n");
1592         }
1593         drm_setup_crtcs(fb_helper);
1594
1595         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1596 }
1597
1598 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1599 {
1600         struct drm_device *dev = fb_helper->dev;
1601         int count = 0;
1602         u32 max_width, max_height, bpp_sel;
1603         bool bound = false, crtcs_bound = false;
1604         struct drm_crtc *crtc;
1605
1606         if (!fb_helper->fb)
1607                 return 0;
1608
1609         sx_xlock(&dev->mode_config.mutex);
1610         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1611                 if (crtc->fb)
1612                         crtcs_bound = true;
1613                 if (crtc->fb == fb_helper->fb)
1614                         bound = true;
1615         }
1616
1617         if (!bound && crtcs_bound) {
1618                 fb_helper->delayed_hotplug = true;
1619                 sx_xunlock(&dev->mode_config.mutex);
1620                 return 0;
1621         }
1622         DRM_DEBUG_KMS("\n");
1623
1624         max_width = fb_helper->fb->width;
1625         max_height = fb_helper->fb->height;
1626         bpp_sel = fb_helper->fb->bits_per_pixel;
1627
1628         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1629                                                     max_height);
1630         drm_setup_crtcs(fb_helper);
1631         sx_xunlock(&dev->mode_config.mutex);
1632
1633         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1634 }
1635