sys/dev/drm2/drm_fb_helper.c

   1 /*
   2  * Copyright (c) 2006-2009 Red Hat Inc.
   3  * Copyright (c) 2006-2008 Intel Corporation
   4  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   5  *
   6  * DRM framebuffer helper functions
   7  *
   8  * Permission to use, copy, modify, distribute, and sell this software and its
   9  * documentation for any purpose is hereby granted without fee, provided that
  10  * the above copyright notice appear in all copies and that both that copyright
  11  * notice and this permission notice appear in supporting documentation, and
  12  * that the name of the copyright holders not be used in advertising or
  13  * publicity pertaining to distribution of the software without specific,
  14  * written prior permission.  The copyright holders make no representations
  15  * about the suitability of this software for any purpose.  It is provided "as
  16  * is" without express or implied warranty.
  17  *
  18  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  *
  26  * Authors:
  27  *      Dave Airlie <airlied@linux.ie>
  28  *      Jesse Barnes <jesse.barnes@intel.com>
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <dev/drm2/drmP.h>
  35 #include <dev/drm2/drm_crtc.h>
  36 #include <dev/drm2/drm_fb_helper.h>
  37 #include <dev/drm2/drm_crtc_helper.h>
  38
  39 #if defined(__FreeBSD__)
  40 struct vt_kms_softc {
  41         struct drm_fb_helper *fb_helper;
  42         struct task     fb_mode_task;
  43 };
  44
  45 static fb_enter_t       vt_kms_postswitch;
  46 static void vt_restore_fbdev_mode(void *, int);
  47
  48 /* Call restore out of vt(9) locks. */
  49 static void
  50 vt_restore_fbdev_mode(void *arg, int pending)
  51 {
  52         struct vt_kms_softc *sc;
  53
  54         sc = (struct vt_kms_softc *)arg;
  55         drm_fb_helper_restore_fbdev_mode(sc->fb_helper);
  56 }
  57
  58 static int
  59 vt_kms_postswitch(void *arg)
  60 {
  61         struct vt_kms_softc *sc;
  62
  63         sc = (struct vt_kms_softc *)arg;
  64         taskqueue_enqueue_fast(taskqueue_thread, &sc->fb_mode_task);
  65
  66         return (0);
  67 }
  68 #endif
  69
  70 static DRM_LIST_HEAD(kernel_fb_helper_list);
  71
  72 /* simple single crtc case helper function */
  73 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
  74 {
  75         struct drm_device *dev = fb_helper->dev;
  76         struct drm_connector *connector;
  77
  78         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  79                 struct drm_fb_helper_connector *fb_helper_connector;
  80
  81                 fb_helper_connector = malloc(
  82                     sizeof(struct drm_fb_helper_connector), DRM_MEM_KMS,
  83                     M_WAITOK | M_ZERO);
  84
  85                 fb_helper_connector->connector = connector;
  86                 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
  87         }
  88         return 0;
  89 }
  90
  91 const char *fb_mode_option;
  92
  93 /**
  94  * drm_fb_helper_connector_parse_command_line - parse command line for connector
  95  * @connector - connector to parse line for
  96  * @mode_option - per connector mode option
  97  *
  98  * This parses the connector specific then generic command lines for
  99  * modes and options to configure the connector.
 100  *
 101  * This uses the same parameters as the fb modedb.c, except for extra
 102  *      <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
 103  *
 104  * enable/enable Digital/disable bit at the end
 105  */
 106 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
 107                                                        const char *mode_option)
 108 {
 109         const char *name;
 110         unsigned int namelen;
 111         int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 112         unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
 113         int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
 114         int i;
 115         enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
 116         struct drm_fb_helper_cmdline_mode *cmdline_mode;
 117         struct drm_connector *connector;
 118
 119         if (!fb_helper_conn)
 120                 return false;
 121         connector = fb_helper_conn->connector;
 122
 123         cmdline_mode = &fb_helper_conn->cmdline_mode;
 124         if (!mode_option)
 125                 mode_option = fb_mode_option;
 126
 127         if (!mode_option) {
 128                 cmdline_mode->specified = false;
 129                 return false;
 130         }
 131
 132         name = mode_option;
 133         namelen = strlen(name);
 134         for (i = namelen-1; i >= 0; i--) {
 135                 switch (name[i]) {
 136                 case '@':
 137                         namelen = i;
 138                         if (!refresh_specified && !bpp_specified &&
 139                             !yres_specified) {
 140                                 refresh = strtol(&name[i+1], NULL, 10);
 141                                 refresh_specified = 1;
 142                                 if (cvt || rb)
 143                                         cvt = 0;
 144                         } else
 145                                 goto done;
 146                         break;
 147                 case '-':
 148                         namelen = i;
 149                         if (!bpp_specified && !yres_specified) {
 150                                 bpp = strtol(&name[i+1], NULL, 10);
 151                                 bpp_specified = 1;
 152                                 if (cvt || rb)
 153                                         cvt = 0;
 154                         } else
 155                                 goto done;
 156                         break;
 157                 case 'x':
 158                         if (!yres_specified) {
 159                                 yres = strtol(&name[i+1], NULL, 10);
 160                                 yres_specified = 1;
 161                         } else
 162                                 goto done;
 163                 case '0' ... '9':
 164                         break;
 165                 case 'M':
 166                         if (!yres_specified)
 167                                 cvt = 1;
 168                         break;
 169                 case 'R':
 170                         if (cvt)
 171                                 rb = 1;
 172                         break;
 173                 case 'm':
 174                         if (!cvt)
 175                                 margins = 1;
 176                         break;
 177                 case 'i':
 178                         if (!cvt)
 179                                 interlace = 1;
 180                         break;
 181                 case 'e':
 182                         force = DRM_FORCE_ON;
 183                         break;
 184                 case 'D':
 185                         if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
 186                             (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
 187                                 force = DRM_FORCE_ON;
 188                         else
 189                                 force = DRM_FORCE_ON_DIGITAL;
 190                         break;
 191                 case 'd':
 192                         force = DRM_FORCE_OFF;
 193                         break;
 194                 default:
 195                         goto done;
 196                 }
 197         }
 198         if (i < 0 && yres_specified) {
 199                 xres = strtol(name, NULL, 10);
 200                 res_specified = 1;
 201         }
 202 done:
 203
 204         DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 205                 drm_get_connector_name(connector), xres, yres,
 206                 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
 207                 "", (margins) ? " with margins" : "", (interlace) ?
 208                 " interlaced" : "");
 209
 210         if (force) {
 211                 const char *s;
 212                 switch (force) {
 213                 case DRM_FORCE_OFF: s = "OFF"; break;
 214                 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
 215                 default:
 216                 case DRM_FORCE_ON: s = "ON"; break;
 217                 }
 218
 219                 DRM_INFO("forcing %s connector %s\n",
 220                          drm_get_connector_name(connector), s);
 221                 connector->force = force;
 222         }
 223
 224         if (res_specified) {
 225                 cmdline_mode->specified = true;
 226                 cmdline_mode->xres = xres;
 227                 cmdline_mode->yres = yres;
 228         }
 229
 230         if (refresh_specified) {
 231                 cmdline_mode->refresh_specified = true;
 232                 cmdline_mode->refresh = refresh;
 233         }
 234
 235         if (bpp_specified) {
 236                 cmdline_mode->bpp_specified = true;
 237                 cmdline_mode->bpp = bpp;
 238         }
 239         cmdline_mode->rb = rb ? true : false;
 240         cmdline_mode->cvt = cvt  ? true : false;
 241         cmdline_mode->interlace = interlace ? true : false;
 242
 243         return true;
 244 }
 245
 246 static int
 247 fb_get_options(const char *connector_name, char **option)
 248 {
 249
 250         /*
 251          * TODO: store mode options pointer in ${option} for connector with
 252          * name ${connector_name}
 253          */
 254         return (1);
 255 }
 256
 257 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
 258 {
 259         struct drm_fb_helper_connector *fb_helper_conn;
 260         int i;
 261
 262         for (i = 0; i < fb_helper->connector_count; i++) {
 263                 char *option = NULL;
 264
 265                 fb_helper_conn = fb_helper->connector_info[i];
 266
 267                 /* do something on return - turn off connector maybe */
 268                 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
 269                         continue;
 270
 271                 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
 272         }
 273         return 0;
 274 }
 275
 276 #if 0
 277 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
 278 {
 279         uint16_t *r_base, *g_base, *b_base;
 280         int i;
 281
 282         r_base = crtc->gamma_store;
 283         g_base = r_base + crtc->gamma_size;
 284         b_base = g_base + crtc->gamma_size;
 285
 286         for (i = 0; i < crtc->gamma_size; i++)
 287                 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
 288 }
 289
 290 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
 291 {
 292         uint16_t *r_base, *g_base, *b_base;
 293
 294         r_base = crtc->gamma_store;
 295         g_base = r_base + crtc->gamma_size;
 296         b_base = g_base + crtc->gamma_size;
 297
 298         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
 299 }
 300 #endif
 301
 302 #if 0
 303 int drm_fb_helper_debug_enter(struct fb_info *info)
 304 {
 305         struct drm_fb_helper *helper = info->par;
 306         struct drm_crtc_helper_funcs *funcs;
 307         int i;
 308
 309         if (list_empty(&kernel_fb_helper_list))
 310                 return false;
 311
 312         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 313                 for (i = 0; i < helper->crtc_count; i++) {
 314                         struct drm_mode_set *mode_set =
 315                                 &helper->crtc_info[i].mode_set;
 316
 317                         if (!mode_set->crtc->enabled)
 318                                 continue;
 319
 320                         funcs = mode_set->crtc->helper_private;
 321                         drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
 322                         funcs->mode_set_base_atomic(mode_set->crtc,
 323                                                     mode_set->fb,
 324                                                     mode_set->x,
 325                                                     mode_set->y,
 326                                                     ENTER_ATOMIC_MODE_SET);
 327                 }
 328         }
 329
 330         return 0;
 331 }
 332 #endif
 333
 334 #if 0
 335 /* Find the real fb for a given fb helper CRTC */
 336 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
 337 {
 338         struct drm_device *dev = crtc->dev;
 339         struct drm_crtc *c;
 340
 341         list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
 342                 if (crtc->base.id == c->base.id)
 343                         return c->fb;
 344         }
 345
 346         return NULL;
 347 }
 348 #endif
 349
 350 #if 0
 351 int drm_fb_helper_debug_leave(struct fb_info *info)
 352 {
 353         struct drm_fb_helper *helper = info->par;
 354         struct drm_crtc *crtc;
 355         struct drm_crtc_helper_funcs *funcs;
 356         struct drm_framebuffer *fb;
 357         int i;
 358
 359         for (i = 0; i < helper->crtc_count; i++) {
 360                 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
 361                 crtc = mode_set->crtc;
 362                 funcs = crtc->helper_private;
 363                 fb = drm_mode_config_fb(crtc);
 364
 365                 if (!crtc->enabled)
 366                         continue;
 367
 368                 if (!fb) {
 369                         DRM_ERROR("no fb to restore??\n");
 370                         continue;
 371                 }
 372
 373                 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
 374                 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
 375                                             crtc->y, LEAVE_ATOMIC_MODE_SET);
 376         }
 377
 378         return 0;
 379 }
 380 #endif
 381
 382 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 383 {
 384         bool error = false;
 385         int i, ret;
 386         for (i = 0; i < fb_helper->crtc_count; i++) {
 387                 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
 388                 ret = drm_crtc_helper_set_config(mode_set);
 389                 if (ret)
 390                         error = true;
 391         }
 392         return error;
 393 }
 394
 395 #if 0
 396 bool drm_fb_helper_force_kernel_mode(void)
 397 {
 398         bool ret, error = false;
 399         struct drm_fb_helper *helper;
 400
 401         if (list_empty(&kernel_fb_helper_list))
 402                 return false;
 403
 404         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 405                 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 406                         continue;
 407
 408                 ret = drm_fb_helper_restore_fbdev_mode(helper);
 409                 if (ret)
 410                         error = true;
 411         }
 412         return error;
 413 }
 414 #endif
 415
 416 #if 0
 417 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
 418                         void *panic_str)
 419 {
 420         printf("panic occurred, switching back to text console\n");
 421         return drm_fb_helper_force_kernel_mode();
 422         return 0;
 423 }
 424
 425 static struct notifier_block paniced = {
 426         .notifier_call = drm_fb_helper_panic,
 427 };
 428
 429 /**
 430  * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 431  *
 432  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 433  */
 434 void drm_fb_helper_restore(void)
 435 {
 436         bool ret;
 437         ret = drm_fb_helper_force_kernel_mode();
 438         if (ret == true)
 439                 DRM_ERROR("Failed to restore crtc configuration\n");
 440 }
 441
 442 #ifdef CONFIG_MAGIC_SYSRQ
 443 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
 444 {
 445         drm_fb_helper_restore();
 446 }
 447 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
 448
 449 static void drm_fb_helper_sysrq(int dummy1)
 450 {
 451         schedule_work(&drm_fb_helper_restore_work);
 452 }
 453
 454 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
 455         .handler = drm_fb_helper_sysrq,
 456         .help_msg = "force-fb(V)",
 457         .action_msg = "Restore framebuffer console",
 458 };
 459 #else
 460 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
 461 #endif
 462 #endif
 463
 464 #if 0
 465 static void drm_fb_helper_on(struct fb_info *info)
 466 {
 467         struct drm_fb_helper *fb_helper = info->par;
 468         struct drm_device *dev = fb_helper->dev;
 469         struct drm_crtc *crtc;
 470         struct drm_crtc_helper_funcs *crtc_funcs;
 471         struct drm_connector *connector;
 472         struct drm_encoder *encoder;
 473         int i, j;
 474
 475         /*
 476          * For each CRTC in this fb, turn the crtc on then,
 477          * find all associated encoders and turn them on.
 478          */
 479         sx_xlock(&dev->mode_config.mutex);
 480         for (i = 0; i < fb_helper->crtc_count; i++) {
 481                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 482                 crtc_funcs = crtc->helper_private;
 483
 484                 if (!crtc->enabled)
 485                         continue;
 486
 487                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 488
 489                 /* Walk the connectors & encoders on this fb turning them on */
 490                 for (j = 0; j < fb_helper->connector_count; j++) {
 491                         connector = fb_helper->connector_info[j]->connector;
 492                         connector->dpms = DRM_MODE_DPMS_ON;
 493                         drm_connector_property_set_value(connector,
 494                                                          dev->mode_config.dpms_property,
 495                                                          DRM_MODE_DPMS_ON);
 496                 }
 497                 /* Found a CRTC on this fb, now find encoders */
 498                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 499                         if (encoder->crtc == crtc) {
 500                                 struct drm_encoder_helper_funcs *encoder_funcs;
 501
 502                                 encoder_funcs = encoder->helper_private;
 503                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 504                         }
 505                 }
 506         }
 507         sx_xunlock(&dev->mode_config.mutex);
 508 }
 509 #endif
 510
 511 #if 0
 512 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
 513 {
 514         struct drm_fb_helper *fb_helper = info->par;
 515         struct drm_device *dev = fb_helper->dev;
 516         struct drm_crtc *crtc;
 517         struct drm_crtc_helper_funcs *crtc_funcs;
 518         struct drm_connector *connector;
 519         struct drm_encoder *encoder;
 520         int i, j;
 521
 522         /*
 523          * For each CRTC in this fb, find all associated encoders
 524          * and turn them off, then turn off the CRTC.
 525          */
 526         sx_xlock(&dev->mode_config.mutex);
 527         for (i = 0; i < fb_helper->crtc_count; i++) {
 528                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 529                 crtc_funcs = crtc->helper_private;
 530
 531                 if (!crtc->enabled)
 532                         continue;
 533
 534                 /* Walk the connectors on this fb and mark them off */
 535                 for (j = 0; j < fb_helper->connector_count; j++) {
 536                         connector = fb_helper->connector_info[j]->connector;
 537                         connector->dpms = dpms_mode;
 538                         drm_connector_property_set_value(connector,
 539                                                          dev->mode_config.dpms_property,
 540                                                          dpms_mode);
 541                 }
 542                 /* Found a CRTC on this fb, now find encoders */
 543                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 544                         if (encoder->crtc == crtc) {
 545                                 struct drm_encoder_helper_funcs *encoder_funcs;
 546
 547                                 encoder_funcs = encoder->helper_private;
 548                                 encoder_funcs->dpms(encoder, dpms_mode);
 549                         }
 550                 }
 551                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 552         }
 553         sx_xunlock(&dev->mode_config.mutex);
 554 }
 555 #endif
 556
 557 #if 0
 558 int drm_fb_helper_blank(int blank, struct fb_info *info)
 559 {
 560         switch (blank) {
 561         /* Display: On; HSync: On, VSync: On */
 562         case FB_BLANK_UNBLANK:
 563                 drm_fb_helper_on(info);
 564                 break;
 565         /* Display: Off; HSync: On, VSync: On */
 566         case FB_BLANK_NORMAL:
 567                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 568                 break;
 569         /* Display: Off; HSync: Off, VSync: On */
 570         case FB_BLANK_HSYNC_SUSPEND:
 571                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 572                 break;
 573         /* Display: Off; HSync: On, VSync: Off */
 574         case FB_BLANK_VSYNC_SUSPEND:
 575                 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
 576                 break;
 577         /* Display: Off; HSync: Off, VSync: Off */
 578         case FB_BLANK_POWERDOWN:
 579                 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
 580                 break;
 581         }
 582         return 0;
 583 }
 584 #endif
 585
 586 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
 587 {
 588         int i;
 589
 590         for (i = 0; i < helper->connector_count; i++)
 591                 free(helper->connector_info[i], DRM_MEM_KMS);
 592         free(helper->connector_info, DRM_MEM_KMS);
 593         for (i = 0; i < helper->crtc_count; i++) {
 594                 free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS);
 595                 if (helper->crtc_info[i].mode_set.mode)
 596                         drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
 597         }
 598         free(helper->crtc_info, DRM_MEM_KMS);
 599 }
 600
 601 int drm_fb_helper_init(struct drm_device *dev,
 602                        struct drm_fb_helper *fb_helper,
 603                        int crtc_count, int max_conn_count)
 604 {
 605         struct drm_crtc *crtc;
 606         int i;
 607
 608         fb_helper->dev = dev;
 609
 610         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 611
 612         fb_helper->crtc_info = malloc(crtc_count *
 613             sizeof(struct drm_fb_helper_crtc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 614
 615         fb_helper->crtc_count = crtc_count;
 616         fb_helper->connector_info = malloc(dev->mode_config.num_connector *
 617             sizeof(struct drm_fb_helper_connector *), DRM_MEM_KMS,
 618             M_WAITOK | M_ZERO);
 619         fb_helper->connector_count = 0;
 620
 621         for (i = 0; i < crtc_count; i++) {
 622                 fb_helper->crtc_info[i].mode_set.connectors =
 623                         malloc(max_conn_count * sizeof(struct drm_connector *),
 624                             DRM_MEM_KMS, M_WAITOK | M_ZERO);
 625
 626                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 627         }
 628
 629         i = 0;
 630         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 631                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 632                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 633                 i++;
 634         }
 635         fb_helper->conn_limit = max_conn_count;
 636         return 0;
 637 }
 638
 639 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 640 {
 641         if (!list_empty(&fb_helper->kernel_fb_list)) {
 642                 list_del(&fb_helper->kernel_fb_list);
 643                 if (list_empty(&kernel_fb_helper_list)) {
 644 #if 0
 645                         printk(KERN_INFO "drm: unregistered panic notifier\n");
 646                         atomic_notifier_chain_unregister(&panic_notifier_list,
 647                                                          &paniced);
 648                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 649 #endif
 650                 }
 651         }
 652
 653         drm_fb_helper_crtc_free(fb_helper);
 654
 655 }
 656
 657 #if 0
 658 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 659                      u16 blue, u16 regno, struct fb_info *info)
 660 {
 661         struct drm_fb_helper *fb_helper = info->par;
 662         struct drm_framebuffer *fb = fb_helper->fb;
 663         int pindex;
 664
 665         if (info->fix.visual == FB_VISUAL_trueCOLOR) {
 666                 u32 *palette;
 667                 u32 value;
 668                 /* place color in psuedopalette */
 669                 if (regno > 16)
 670                         return -EINVAL;
 671                 palette = (u32 *)info->pseudo_palette;
 672                 red >>= (16 - info->var.red.length);
 673                 green >>= (16 - info->var.green.length);
 674                 blue >>= (16 - info->var.blue.length);
 675                 value = (red << info->var.red.offset) |
 676                         (green << info->var.green.offset) |
 677                         (blue << info->var.blue.offset);
 678                 if (info->var.transp.length > 0) {
 679                         u32 mask = (1 << info->var.transp.length) - 1;
 680                         mask <<= info->var.transp.offset;
 681                         value |= mask;
 682                 }
 683                 palette[regno] = value;
 684                 return 0;
 685         }
 686
 687         pindex = regno;
 688
 689         if (fb->bits_per_pixel == 16) {
 690                 pindex = regno << 3;
 691
 692                 if (fb->depth == 16 && regno > 63)
 693                         return -EINVAL;
 694                 if (fb->depth == 15 && regno > 31)
 695                         return -EINVAL;
 696
 697                 if (fb->depth == 16) {
 698                         u16 r, g, b;
 699                         int i;
 700                         if (regno < 32) {
 701                                 for (i = 0; i < 8; i++)
 702                                         fb_helper->funcs->gamma_set(crtc, red,
 703                                                 green, blue, pindex + i);
 704                         }
 705
 706                         fb_helper->funcs->gamma_get(crtc, &r,
 707                                                     &g, &b,
 708                                                     pindex >> 1);
 709
 710                         for (i = 0; i < 4; i++)
 711                                 fb_helper->funcs->gamma_set(crtc, r,
 712                                                             green, b,
 713                                                             (pindex >> 1) + i);
 714                 }
 715         }
 716
 717         if (fb->depth != 16)
 718                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 719         return 0;
 720 }
 721 #endif
 722
 723 #if 0
 724 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 725 {
 726         struct drm_fb_helper *fb_helper = info->par;
 727         struct drm_crtc_helper_funcs *crtc_funcs;
 728         u16 *red, *green, *blue, *transp;
 729         struct drm_crtc *crtc;
 730         int i, j, rc = 0;
 731         int start;
 732
 733         for (i = 0; i < fb_helper->crtc_count; i++) {
 734                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 735                 crtc_funcs = crtc->helper_private;
 736
 737                 red = cmap->red;
 738                 green = cmap->green;
 739                 blue = cmap->blue;
 740                 transp = cmap->transp;
 741                 start = cmap->start;
 742
 743                 for (j = 0; j < cmap->len; j++) {
 744                         u16 hred, hgreen, hblue, htransp = 0xffff;
 745
 746                         hred = *red++;
 747                         hgreen = *green++;
 748                         hblue = *blue++;
 749
 750                         if (transp)
 751                                 htransp = *transp++;
 752
 753                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 754                         if (rc)
 755                                 return rc;
 756                 }
 757                 crtc_funcs->load_lut(crtc);
 758         }
 759         return rc;
 760 }
 761 #endif
 762
 763 #if 0
 764 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 765                             struct fb_info *info)
 766 {
 767         struct drm_fb_helper *fb_helper = info->par;
 768         struct drm_framebuffer *fb = fb_helper->fb;
 769         int depth;
 770
 771         if (var->pixclock != 0 || in_dbg_master())
 772                 return -EINVAL;
 773
 774         /* Need to resize the fb object !!! */
 775         if (var->bits_per_pixel > fb->bits_per_pixel ||
 776             var->xres > fb->width || var->yres > fb->height ||
 777             var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
 778                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 779                           "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
 780                           var->xres, var->yres, var->bits_per_pixel,
 781                           var->xres_virtual, var->yres_virtual,
 782                           fb->width, fb->height, fb->bits_per_pixel);
 783                 return -EINVAL;
 784         }
 785
 786         switch (var->bits_per_pixel) {
 787         case 16:
 788                 depth = (var->green.length == 6) ? 16 : 15;
 789                 break;
 790         case 32:
 791                 depth = (var->transp.length > 0) ? 32 : 24;
 792                 break;
 793         default:
 794                 depth = var->bits_per_pixel;
 795                 break;
 796         }
 797
 798         switch (depth) {
 799         case 8:
 800                 var->red.offset = 0;
 801                 var->green.offset = 0;
 802                 var->blue.offset = 0;
 803                 var->red.length = 8;
 804                 var->green.length = 8;
 805                 var->blue.length = 8;
 806                 var->transp.length = 0;
 807                 var->transp.offset = 0;
 808                 break;
 809         case 15:
 810                 var->red.offset = 10;
 811                 var->green.offset = 5;
 812                 var->blue.offset = 0;
 813                 var->red.length = 5;
 814                 var->green.length = 5;
 815                 var->blue.length = 5;
 816                 var->transp.length = 1;
 817                 var->transp.offset = 15;
 818                 break;
 819         case 16:
 820                 var->red.offset = 11;
 821                 var->green.offset = 5;
 822                 var->blue.offset = 0;
 823                 var->red.length = 5;
 824                 var->green.length = 6;
 825                 var->blue.length = 5;
 826                 var->transp.length = 0;
 827                 var->transp.offset = 0;
 828                 break;
 829         case 24:
 830                 var->red.offset = 16;
 831                 var->green.offset = 8;
 832                 var->blue.offset = 0;
 833                 var->red.length = 8;
 834                 var->green.length = 8;
 835                 var->blue.length = 8;
 836                 var->transp.length = 0;
 837                 var->transp.offset = 0;
 838                 break;
 839         case 32:
 840                 var->red.offset = 16;
 841                 var->green.offset = 8;
 842                 var->blue.offset = 0;
 843                 var->red.length = 8;
 844                 var->green.length = 8;
 845                 var->blue.length = 8;
 846                 var->transp.length = 8;
 847                 var->transp.offset = 24;
 848                 break;
 849         default:
 850                 return -EINVAL;
 851         }
 852         return 0;
 853 }
 854 #endif
 855
 856 #if 0
 857 /* this will let fbcon do the mode init */
 858 int drm_fb_helper_set_par(struct fb_info *info)
 859 {
 860         struct drm_fb_helper *fb_helper = info->par;
 861         struct drm_device *dev = fb_helper->dev;
 862         struct fb_var_screeninfo *var = &info->var;
 863         struct drm_crtc *crtc;
 864         int ret;
 865         int i;
 866
 867         if (var->pixclock != 0) {
 868                 DRM_ERROR("PIXEL CLOCK SET\n");
 869                 return -EINVAL;
 870         }
 871
 872         mutex_lock(&dev->mode_config.mutex);
 873         for (i = 0; i < fb_helper->crtc_count; i++) {
 874                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 875                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 876                 if (ret) {
 877                         mutex_unlock(&dev->mode_config.mutex);
 878                         return ret;
 879                 }
 880         }
 881         mutex_unlock(&dev->mode_config.mutex);
 882
 883         if (fb_helper->delayed_hotplug) {
 884                 fb_helper->delayed_hotplug = false;
 885                 drm_fb_helper_hotplug_event(fb_helper);
 886         }
 887         return 0;
 888 }
 889 #endif
 890
 891 #if 0
 892 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 893                               struct fb_info *info)
 894 {
 895         struct drm_fb_helper *fb_helper = info->par;
 896         struct drm_device *dev = fb_helper->dev;
 897         struct drm_mode_set *modeset;
 898         struct drm_crtc *crtc;
 899         int ret = 0;
 900         int i;
 901
 902         mutex_lock(&dev->mode_config.mutex);
 903         for (i = 0; i < fb_helper->crtc_count; i++) {
 904                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 905
 906                 modeset = &fb_helper->crtc_info[i].mode_set;
 907
 908                 modeset->x = var->xoffset;
 909                 modeset->y = var->yoffset;
 910
 911                 if (modeset->num_connectors) {
 912                         ret = crtc->funcs->set_config(modeset);
 913                         if (!ret) {
 914                                 info->var.xoffset = var->xoffset;
 915                                 info->var.yoffset = var->yoffset;
 916                         }
 917                 }
 918         }
 919         mutex_unlock(&dev->mode_config.mutex);
 920         return ret;
 921 }
 922 #endif
 923
 924 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 925                                   int preferred_bpp)
 926 {
 927         int new_fb = 0;
 928         int crtc_count = 0;
 929         int i;
 930         struct fb_info *info;
 931         struct drm_fb_helper_surface_size sizes;
 932         int gamma_size = 0;
 933 #if defined(__FreeBSD__)
 934         struct vt_kms_softc *sc;
 935 #endif
 936
 937         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 938         sizes.surface_depth = 24;
 939         sizes.surface_bpp = 32;
 940         sizes.fb_width = (unsigned)-1;
 941         sizes.fb_height = (unsigned)-1;
 942
 943         /* if driver picks 8 or 16 by default use that
 944            for both depth/bpp */
 945         if (preferred_bpp != sizes.surface_bpp) {
 946                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 947         }
 948         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 949         for (i = 0; i < fb_helper->connector_count; i++) {
 950                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 951                 struct drm_fb_helper_cmdline_mode *cmdline_mode;
 952
 953                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 954
 955                 if (cmdline_mode->bpp_specified) {
 956                         switch (cmdline_mode->bpp) {
 957                         case 8:
 958                                 sizes.surface_depth = sizes.surface_bpp = 8;
 959                                 break;
 960                         case 15:
 961                                 sizes.surface_depth = 15;
 962                                 sizes.surface_bpp = 16;
 963                                 break;
 964                         case 16:
 965                                 sizes.surface_depth = sizes.surface_bpp = 16;
 966                                 break;
 967                         case 24:
 968                                 sizes.surface_depth = sizes.surface_bpp = 24;
 969                                 break;
 970                         case 32:
 971                                 sizes.surface_depth = 24;
 972                                 sizes.surface_bpp = 32;
 973                                 break;
 974                         }
 975                         break;
 976                 }
 977         }
 978
 979         crtc_count = 0;
 980         for (i = 0; i < fb_helper->crtc_count; i++) {
 981                 struct drm_display_mode *desired_mode;
 982                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 983
 984                 if (desired_mode) {
 985                         if (gamma_size == 0)
 986                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 987                         if (desired_mode->hdisplay < sizes.fb_width)
 988                                 sizes.fb_width = desired_mode->hdisplay;
 989                         if (desired_mode->vdisplay < sizes.fb_height)
 990                                 sizes.fb_height = desired_mode->vdisplay;
 991                         if (desired_mode->hdisplay > sizes.surface_width)
 992                                 sizes.surface_width = desired_mode->hdisplay;
 993                         if (desired_mode->vdisplay > sizes.surface_height)
 994                                 sizes.surface_height = desired_mode->vdisplay;
 995                         crtc_count++;
 996                 }
 997         }
 998
 999         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
1000                 /* hmm everyone went away - assume VGA cable just fell out
1001                    and will come back later. */
1002                 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
1003                 sizes.fb_width = sizes.surface_width = 1024;
1004                 sizes.fb_height = sizes.surface_height = 768;
1005         }
1006
1007         /* push down into drivers */
1008         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
1009         if (new_fb < 0)
1010                 return new_fb;
1011
1012 #if defined(__FreeBSD__)
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 #endif
1028
1029         /* set the fb pointer */
1030         for (i = 0; i < fb_helper->crtc_count; i++) {
1031                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
1032         }
1033
1034 #if defined(__FreeBSD__)
1035         if (new_fb) {
1036                 register_framebuffer(info);
1037         }
1038 #else
1039         if (new_fb) {
1040                 info->var.pixclock = 0;
1041                 if (register_framebuffer(info) < 0) {
1042                         return -EINVAL;
1043                 }
1044
1045                 printf("fb%d: %s frame buffer device\n", info->node,
1046                        info->fix.id);
1047
1048         } else {
1049                 drm_fb_helper_set_par(info);
1050         }
1051
1052         /* Switch back to kernel console on panic */
1053         /* multi card linked list maybe */
1054         if (list_empty(&kernel_fb_helper_list)) {
1055                 printf("drm: registered panic notifier\n");
1056                 atomic_notifier_chain_register(&panic_notifier_list,
1057                                                &paniced);
1058         }
1059         if (new_fb)
1060                 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
1061 #endif
1062         return 0;
1063 }
1064
1065 #if 0
1066 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
1067                             uint32_t depth)
1068 {
1069         info->fix.type = FB_TYPE_PACKED_PIXELS;
1070         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1071                 FB_VISUAL_trueCOLOR;
1072         info->fix.mmio_start = 0;
1073         info->fix.mmio_len = 0;
1074         info->fix.type_aux = 0;
1075         info->fix.xpanstep = 1; /* doing it in hw */
1076         info->fix.ypanstep = 1; /* doing it in hw */
1077         info->fix.ywrapstep = 0;
1078         info->fix.accel = FB_ACCEL_NONE;
1079         info->fix.type_aux = 0;
1080
1081         info->fix.line_length = pitch;
1082         return;
1083 }
1084
1085 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1086                             uint32_t fb_width, uint32_t fb_height)
1087 {
1088         struct drm_framebuffer *fb = fb_helper->fb;
1089         info->pseudo_palette = fb_helper->pseudo_palette;
1090         info->var.xres_virtual = fb->width;
1091         info->var.yres_virtual = fb->height;
1092         info->var.bits_per_pixel = fb->bits_per_pixel;
1093         info->var.accel_flags = FB_ACCELF_TEXT;
1094         info->var.xoffset = 0;
1095         info->var.yoffset = 0;
1096         info->var.activate = FB_ACTIVATE_NOW;
1097         info->var.height = -1;
1098         info->var.width = -1;
1099
1100         switch (fb->depth) {
1101         case 8:
1102                 info->var.red.offset = 0;
1103                 info->var.green.offset = 0;
1104                 info->var.blue.offset = 0;
1105                 info->var.red.length = 8; /* 8bit DAC */
1106                 info->var.green.length = 8;
1107                 info->var.blue.length = 8;
1108                 info->var.transp.offset = 0;
1109                 info->var.transp.length = 0;
1110                 break;
1111         case 15:
1112                 info->var.red.offset = 10;
1113                 info->var.green.offset = 5;
1114                 info->var.blue.offset = 0;
1115                 info->var.red.length = 5;
1116                 info->var.green.length = 5;
1117                 info->var.blue.length = 5;
1118                 info->var.transp.offset = 15;
1119                 info->var.transp.length = 1;
1120                 break;
1121         case 16:
1122                 info->var.red.offset = 11;
1123                 info->var.green.offset = 5;
1124                 info->var.blue.offset = 0;
1125                 info->var.red.length = 5;
1126                 info->var.green.length = 6;
1127                 info->var.blue.length = 5;
1128                 info->var.transp.offset = 0;
1129                 break;
1130         case 24:
1131                 info->var.red.offset = 16;
1132                 info->var.green.offset = 8;
1133                 info->var.blue.offset = 0;
1134                 info->var.red.length = 8;
1135                 info->var.green.length = 8;
1136                 info->var.blue.length = 8;
1137                 info->var.transp.offset = 0;
1138                 info->var.transp.length = 0;
1139                 break;
1140         case 32:
1141                 info->var.red.offset = 16;
1142                 info->var.green.offset = 8;
1143                 info->var.blue.offset = 0;
1144                 info->var.red.length = 8;
1145                 info->var.green.length = 8;
1146                 info->var.blue.length = 8;
1147                 info->var.transp.offset = 24;
1148                 info->var.transp.length = 8;
1149                 break;
1150         default:
1151                 break;
1152         }
1153
1154         info->var.xres = fb_width;
1155         info->var.yres = fb_height;
1156 }
1157 #endif
1158
1159 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1160                                                uint32_t maxX,
1161                                                uint32_t maxY)
1162 {
1163         struct drm_connector *connector;
1164         int count = 0;
1165         int i;
1166
1167         for (i = 0; i < fb_helper->connector_count; i++) {
1168                 connector = fb_helper->connector_info[i]->connector;
1169                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1170         }
1171
1172         return count;
1173 }
1174
1175 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1176 {
1177         struct drm_display_mode *mode;
1178
1179         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1180                 if (drm_mode_width(mode) > width ||
1181                     drm_mode_height(mode) > height)
1182                         continue;
1183                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1184                         return mode;
1185         }
1186         return NULL;
1187 }
1188
1189 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1190 {
1191         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1192         cmdline_mode = &fb_connector->cmdline_mode;
1193         return cmdline_mode->specified;
1194 }
1195
1196 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1197                                                       int width, int height)
1198 {
1199         struct drm_cmdline_mode *cmdline_mode;
1200         struct drm_display_mode *mode = NULL;
1201
1202         cmdline_mode = &fb_helper_conn->cmdline_mode1;
1203         if (cmdline_mode->specified == false &&
1204             !drm_fetch_cmdline_mode_from_kenv(fb_helper_conn->connector,
1205             cmdline_mode))
1206                         return (NULL);
1207
1208         /* attempt to find a matching mode in the list of modes
1209          *  we have gotten so far, if not add a CVT mode that conforms
1210          */
1211         if (cmdline_mode->rb || cmdline_mode->margins)
1212                 goto create_mode;
1213
1214         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1215                 /* check width/height */
1216                 if (mode->hdisplay != cmdline_mode->xres ||
1217                     mode->vdisplay != cmdline_mode->yres)
1218                         continue;
1219
1220                 if (cmdline_mode->refresh_specified) {
1221                         if (mode->vrefresh != cmdline_mode->refresh)
1222                                 continue;
1223                 }
1224
1225                 if (cmdline_mode->interlace) {
1226                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1227                                 continue;
1228                 }
1229                 return mode;
1230         }
1231
1232 create_mode:
1233         if (cmdline_mode->cvt)
1234                 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1235                                     cmdline_mode->xres, cmdline_mode->yres,
1236                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1237                                     cmdline_mode->rb, cmdline_mode->interlace,
1238                                     cmdline_mode->margins);
1239         else
1240                 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1241                                     cmdline_mode->xres, cmdline_mode->yres,
1242                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1243                                     cmdline_mode->interlace,
1244                                     cmdline_mode->margins);
1245         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1246         list_add(&mode->head, &fb_helper_conn->connector->modes);
1247         return mode;
1248 }
1249
1250 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1251 {
1252         bool enable;
1253
1254         if (strict) {
1255                 enable = connector->status == connector_status_connected;
1256         } else {
1257                 enable = connector->status != connector_status_disconnected;
1258         }
1259         return enable;
1260 }
1261
1262 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1263                                   bool *enabled)
1264 {
1265         bool any_enabled = false;
1266         struct drm_connector *connector;
1267         int i = 0;
1268
1269         for (i = 0; i < fb_helper->connector_count; i++) {
1270                 connector = fb_helper->connector_info[i]->connector;
1271                 enabled[i] = drm_connector_enabled(connector, true);
1272                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1273                           enabled[i] ? "yes" : "no");
1274                 any_enabled |= enabled[i];
1275         }
1276
1277         if (any_enabled)
1278                 return;
1279
1280         for (i = 0; i < fb_helper->connector_count; i++) {
1281                 connector = fb_helper->connector_info[i]->connector;
1282                 enabled[i] = drm_connector_enabled(connector, false);
1283         }
1284 }
1285
1286 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1287                               struct drm_display_mode **modes,
1288                               bool *enabled, int width, int height)
1289 {
1290         int count, i, j;
1291         bool can_clone = false;
1292         struct drm_fb_helper_connector *fb_helper_conn;
1293         struct drm_display_mode *dmt_mode, *mode;
1294
1295         /* only contemplate cloning in the single crtc case */
1296         if (fb_helper->crtc_count > 1)
1297                 return false;
1298
1299         count = 0;
1300         for (i = 0; i < fb_helper->connector_count; i++) {
1301                 if (enabled[i])
1302                         count++;
1303         }
1304
1305         /* only contemplate cloning if more than one connector is enabled */
1306         if (count <= 1)
1307                 return false;
1308
1309         /* check the command line or if nothing common pick 1024x768 */
1310         can_clone = true;
1311         for (i = 0; i < fb_helper->connector_count; i++) {
1312                 if (!enabled[i])
1313                         continue;
1314                 fb_helper_conn = fb_helper->connector_info[i];
1315                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1316                 if (!modes[i]) {
1317                         can_clone = false;
1318                         break;
1319                 }
1320                 for (j = 0; j < i; j++) {
1321                         if (!enabled[j])
1322                                 continue;
1323                         if (!drm_mode_equal(modes[j], modes[i]))
1324                                 can_clone = false;
1325                 }
1326         }
1327
1328         if (can_clone) {
1329                 DRM_DEBUG_KMS("can clone using command line\n");
1330                 return true;
1331         }
1332
1333         /* try and find a 1024x768 mode on each connector */
1334         can_clone = true;
1335         dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1336
1337         for (i = 0; i < fb_helper->connector_count; i++) {
1338
1339                 if (!enabled[i])
1340                         continue;
1341
1342                 fb_helper_conn = fb_helper->connector_info[i];
1343                 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1344                         if (drm_mode_equal(mode, dmt_mode))
1345                                 modes[i] = mode;
1346                 }
1347                 if (!modes[i])
1348                         can_clone = false;
1349         }
1350
1351         if (can_clone) {
1352                 DRM_DEBUG_KMS("can clone using 1024x768\n");
1353                 return true;
1354         }
1355         DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1356         return false;
1357 }
1358
1359 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1360                                  struct drm_display_mode **modes,
1361                                  bool *enabled, int width, int height)
1362 {
1363         struct drm_fb_helper_connector *fb_helper_conn;
1364         int i;
1365
1366         for (i = 0; i < fb_helper->connector_count; i++) {
1367                 fb_helper_conn = fb_helper->connector_info[i];
1368
1369                 if (enabled[i] == false)
1370                         continue;
1371
1372                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1373                               fb_helper_conn->connector->base.id);
1374
1375                 /* got for command line mode first */
1376                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1377                 if (!modes[i]) {
1378                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1379                                       fb_helper_conn->connector->base.id);
1380                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1381                 }
1382                 /* No preferred modes, pick one off the list */
1383                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1384                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1385                                 break;
1386                 }
1387                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1388                           "none");
1389         }
1390         return true;
1391 }
1392
1393 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1394                           struct drm_fb_helper_crtc **best_crtcs,
1395                           struct drm_display_mode **modes,
1396                           int n, int width, int height)
1397 {
1398         int c, o;
1399         struct drm_device *dev = fb_helper->dev;
1400         struct drm_connector *connector;
1401         struct drm_connector_helper_funcs *connector_funcs;
1402         struct drm_encoder *encoder;
1403         struct drm_fb_helper_crtc *best_crtc;
1404         int my_score, best_score, score;
1405         struct drm_fb_helper_crtc **crtcs, *crtc;
1406         struct drm_fb_helper_connector *fb_helper_conn;
1407
1408         if (n == fb_helper->connector_count)
1409                 return 0;
1410
1411         fb_helper_conn = fb_helper->connector_info[n];
1412         connector = fb_helper_conn->connector;
1413
1414         best_crtcs[n] = NULL;
1415         best_crtc = NULL;
1416         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1417         if (modes[n] == NULL)
1418                 return best_score;
1419
1420         crtcs = malloc(dev->mode_config.num_connector *
1421             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1422             M_WAITOK | M_ZERO);
1423
1424         my_score = 1;
1425         if (connector->status == connector_status_connected)
1426                 my_score++;
1427         if (drm_has_cmdline_mode(fb_helper_conn))
1428                 my_score++;
1429         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1430                 my_score++;
1431
1432         connector_funcs = connector->helper_private;
1433         encoder = connector_funcs->best_encoder(connector);
1434         if (!encoder)
1435                 goto out;
1436
1437         /* select a crtc for this connector and then attempt to configure
1438            remaining connectors */
1439         for (c = 0; c < fb_helper->crtc_count; c++) {
1440                 crtc = &fb_helper->crtc_info[c];
1441
1442                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1443                         continue;
1444                 }
1445
1446                 for (o = 0; o < n; o++)
1447                         if (best_crtcs[o] == crtc)
1448                                 break;
1449
1450                 if (o < n) {
1451                         /* ignore cloning unless only a single crtc */
1452                         if (fb_helper->crtc_count > 1)
1453                                 continue;
1454
1455                         if (!drm_mode_equal(modes[o], modes[n]))
1456                                 continue;
1457                 }
1458
1459                 crtcs[n] = crtc;
1460                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1461                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1462                                                   width, height);
1463                 if (score > best_score) {
1464                         best_crtc = crtc;
1465                         best_score = score;
1466                         memcpy(best_crtcs, crtcs,
1467                                dev->mode_config.num_connector *
1468                                sizeof(struct drm_fb_helper_crtc *));
1469                 }
1470         }
1471 out:
1472         free(crtcs, DRM_MEM_KMS);
1473         return best_score;
1474 }
1475
1476 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1477 {
1478         struct drm_device *dev = fb_helper->dev;
1479         struct drm_fb_helper_crtc **crtcs;
1480         struct drm_display_mode **modes;
1481         struct drm_encoder *encoder;
1482         struct drm_mode_set *modeset;
1483         bool *enabled;
1484         int width, height;
1485         int i, ret;
1486
1487         DRM_DEBUG_KMS("\n");
1488
1489         width = dev->mode_config.max_width;
1490         height = dev->mode_config.max_height;
1491
1492         /* clean out all the encoder/crtc combos */
1493         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1494                 encoder->crtc = NULL;
1495         }
1496
1497         crtcs = malloc(dev->mode_config.num_connector *
1498             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1499             M_WAITOK | M_ZERO);
1500         modes = malloc(dev->mode_config.num_connector *
1501             sizeof(struct drm_display_mode *), DRM_MEM_KMS,
1502             M_WAITOK | M_ZERO);
1503         enabled = malloc(dev->mode_config.num_connector *
1504             sizeof(bool), DRM_MEM_KMS, M_WAITOK | M_ZERO);
1505
1506         drm_enable_connectors(fb_helper, enabled);
1507
1508         ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1509         if (!ret) {
1510                 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1511                 if (!ret)
1512                         DRM_ERROR("Unable to find initial modes\n");
1513         }
1514
1515         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1516
1517         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1518
1519         /* need to set the modesets up here for use later */
1520         /* fill out the connector<->crtc mappings into the modesets */
1521         for (i = 0; i < fb_helper->crtc_count; i++) {
1522                 modeset = &fb_helper->crtc_info[i].mode_set;
1523                 modeset->num_connectors = 0;
1524         }
1525
1526         for (i = 0; i < fb_helper->connector_count; i++) {
1527                 struct drm_display_mode *mode = modes[i];
1528                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1529                 modeset = &fb_crtc->mode_set;
1530
1531                 if (mode && fb_crtc) {
1532                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1533                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1534                         fb_crtc->desired_mode = mode;
1535                         if (modeset->mode)
1536                                 drm_mode_destroy(dev, modeset->mode);
1537                         modeset->mode = drm_mode_duplicate(dev,
1538                                                            fb_crtc->desired_mode);
1539                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1540                 }
1541         }
1542
1543         free(crtcs, DRM_MEM_KMS);
1544         free(modes, DRM_MEM_KMS);
1545         free(enabled, DRM_MEM_KMS);
1546 }
1547
1548 /**
1549  * drm_helper_initial_config - setup a sane initial connector configuration
1550  * @dev: DRM device
1551  *
1552  * LOCKING:
1553  * Called at init time, must take mode config lock.
1554  *
1555  * Scan the CRTCs and connectors and try to put together an initial setup.
1556  * At the moment, this is a cloned configuration across all heads with
1557  * a new framebuffer object as the backing store.
1558  *
1559  * RETURNS:
1560  * Zero if everything went ok, nonzero otherwise.
1561  */
1562 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1563 {
1564         struct drm_device *dev = fb_helper->dev;
1565         int count = 0;
1566
1567         /* disable all the possible outputs/crtcs before entering KMS mode */
1568         drm_helper_disable_unused_functions(fb_helper->dev);
1569
1570         drm_fb_helper_parse_command_line(fb_helper);
1571
1572         count = drm_fb_helper_probe_connector_modes(fb_helper,
1573                                                     dev->mode_config.max_width,
1574                                                     dev->mode_config.max_height);
1575         /*
1576          * we shouldn't end up with no modes here.
1577          */
1578         if (count == 0) {
1579                 printf("No connectors reported connected with modes\n");
1580         }
1581         drm_setup_crtcs(fb_helper);
1582
1583         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1584 }
1585
1586 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1587 {
1588         struct drm_device *dev = fb_helper->dev;
1589         int count = 0;
1590         u32 max_width, max_height, bpp_sel;
1591         bool bound = false, crtcs_bound = false;
1592         struct drm_crtc *crtc;
1593
1594         if (!fb_helper->fb)
1595                 return 0;
1596
1597         sx_xlock(&dev->mode_config.mutex);
1598         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1599                 if (crtc->fb)
1600                         crtcs_bound = true;
1601                 if (crtc->fb == fb_helper->fb)
1602                         bound = true;
1603         }
1604
1605         if (!bound && crtcs_bound) {
1606                 fb_helper->delayed_hotplug = true;
1607                 sx_xunlock(&dev->mode_config.mutex);
1608                 return 0;
1609         }
1610         DRM_DEBUG_KMS("\n");
1611
1612         max_width = fb_helper->fb->width;
1613         max_height = fb_helper->fb->height;
1614         bpp_sel = fb_helper->fb->bits_per_pixel;
1615
1616         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1617                                                     max_height);
1618         drm_setup_crtcs(fb_helper);
1619         sx_xunlock(&dev->mode_config.mutex);
1620
1621         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1622 }
1623