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