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