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