sys/dev/drm2/drm_fb_helper.c

   1 /*
   2  * Copyright (c) 2006-2009 Red Hat Inc.
   3  * Copyright (c) 2006-2008 Intel Corporation
   4  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   5  *
   6  * DRM framebuffer helper functions
   7  *
   8  * Permission to use, copy, modify, distribute, and sell this software and its
   9  * documentation for any purpose is hereby granted without fee, provided that
  10  * the above copyright notice appear in all copies and that both that copyright
  11  * notice and this permission notice appear in supporting documentation, and
  12  * that the name of the copyright holders not be used in advertising or
  13  * publicity pertaining to distribution of the software without specific,
  14  * written prior permission.  The copyright holders make no representations
  15  * about the suitability of this software for any purpose.  It is provided "as
  16  * is" without express or implied warranty.
  17  *
  18  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  *
  26  * Authors:
  27  *      Dave Airlie <airlied@linux.ie>
  28  *      Jesse Barnes <jesse.barnes@intel.com>
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <dev/drm2/drmP.h>
  35 #include <dev/drm2/drm_crtc.h>
  36 #include <dev/drm2/drm_fb_helper.h>
  37 #include <dev/drm2/drm_crtc_helper.h>
  38
  39 #include <sys/kdb.h>
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42
  43 struct vt_kms_softc {
  44         struct drm_fb_helper *fb_helper;
  45         struct task     fb_mode_task;
  46 };
  47
  48 static fb_enter_t       vt_kms_postswitch;
  49 static void vt_restore_fbdev_mode(void *, int);
  50
  51 /* Call restore out of vt(9) locks. */
  52 static void
  53 vt_restore_fbdev_mode(void *arg, int pending)
  54 {
  55         struct drm_fb_helper *fb_helper;
  56         struct vt_kms_softc *sc;
  57
  58         sc = (struct vt_kms_softc *)arg;
  59         fb_helper = sc->fb_helper;
  60         sx_xlock(&fb_helper->dev->mode_config.mutex);
  61         drm_fb_helper_restore_fbdev_mode(fb_helper);
  62         sx_xunlock(&fb_helper->dev->mode_config.mutex);
  63 }
  64
  65 static int
  66 vt_kms_postswitch(void *arg)
  67 {
  68         struct vt_kms_softc *sc;
  69
  70         sc = (struct vt_kms_softc *)arg;
  71
  72         if (!kdb_active && panicstr == NULL)
  73                 taskqueue_enqueue_fast(taskqueue_thread, &sc->fb_mode_task);
  74         else
  75                 drm_fb_helper_restore_fbdev_mode(sc->fb_helper);
  76
  77         return (0);
  78 }
  79
  80 static DRM_LIST_HEAD(kernel_fb_helper_list);
  81
  82 /* simple single crtc case helper function */
  83 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
  84 {
  85         struct drm_device *dev = fb_helper->dev;
  86         struct drm_connector *connector;
  87
  88         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  89                 struct drm_fb_helper_connector *fb_helper_connector;
  90
  91                 fb_helper_connector = malloc(
  92                     sizeof(struct drm_fb_helper_connector), DRM_MEM_KMS,
  93                     M_WAITOK | M_ZERO);
  94
  95                 fb_helper_connector->connector = connector;
  96                 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
  97         }
  98         return 0;
  99 }
 100
 101 static int
 102 fb_get_options(const char *connector_name, char **option)
 103 {
 104         char tunable[64];
 105
 106         /*
 107          * A user may use loader tunables to set a specific mode for the
 108          * console. Tunables are read in the following order:
 109          *     1. kern.vt.fb.modes.$connector_name
 110          *     2. kern.vt.fb.default_mode
 111          *
 112          * Example of a mode specific to the LVDS connector:
 113          *     kern.vt.fb.modes.LVDS="1024x768"
 114          *
 115          * Example of a mode applied to all connectors not having a
 116          * connector-specific mode:
 117          *     kern.vt.fb.default_mode="640x480"
 118          */
 119         snprintf(tunable, sizeof(tunable), "kern.vt.fb.modes.%s",
 120             connector_name);
 121         DRM_INFO("Connector %s: get mode from tunables:\n", connector_name);
 122         DRM_INFO("  - %s\n", tunable);
 123         DRM_INFO("  - kern.vt.fb.default_mode\n");
 124         *option = kern_getenv(tunable);
 125         if (*option == NULL)
 126                 *option = kern_getenv("kern.vt.fb.default_mode");
 127
 128         return (*option != NULL ? 0 : 1);
 129 }
 130
 131 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
 132 {
 133         struct drm_fb_helper_connector *fb_helper_conn;
 134         int i;
 135
 136         for (i = 0; i < fb_helper->connector_count; i++) {
 137                 struct drm_cmdline_mode *mode;
 138                 struct drm_connector *connector;
 139                 char *option = NULL;
 140
 141                 fb_helper_conn = fb_helper->connector_info[i];
 142                 connector = fb_helper_conn->connector;
 143                 mode = &fb_helper_conn->cmdline_mode;
 144
 145                 /* do something on return - turn off connector maybe */
 146                 if (fb_get_options(drm_get_connector_name(connector), &option))
 147                         continue;
 148
 149                 if (drm_mode_parse_command_line_for_connector(option,
 150                                                               connector,
 151                                                               mode)) {
 152                         if (mode->force) {
 153                                 const char *s;
 154                                 switch (mode->force) {
 155                                 case DRM_FORCE_OFF:
 156                                         s = "OFF";
 157                                         break;
 158                                 case DRM_FORCE_ON_DIGITAL:
 159                                         s = "ON - dig";
 160                                         break;
 161                                 default:
 162                                 case DRM_FORCE_ON:
 163                                         s = "ON";
 164                                         break;
 165                                 }
 166
 167                                 DRM_INFO("forcing %s connector %s\n",
 168                                          drm_get_connector_name(connector), s);
 169                                 connector->force = mode->force;
 170                         }
 171
 172                         DRM_INFO("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 173                                       drm_get_connector_name(connector),
 174                                       mode->xres, mode->yres,
 175                                       mode->refresh_specified ? mode->refresh : 60,
 176                                       mode->rb ? " reduced blanking" : "",
 177                                       mode->margins ? " with margins" : "",
 178                                       mode->interlace ?  " interlaced" : "");
 179                 }
 180
 181                 freeenv(option);
 182
 183         }
 184         return 0;
 185 }
 186
 187 #if 0
 188 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
 189 {
 190         uint16_t *r_base, *g_base, *b_base;
 191         int i;
 192
 193         r_base = crtc->gamma_store;
 194         g_base = r_base + crtc->gamma_size;
 195         b_base = g_base + crtc->gamma_size;
 196
 197         for (i = 0; i < crtc->gamma_size; i++)
 198                 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
 199 }
 200
 201 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
 202 {
 203         uint16_t *r_base, *g_base, *b_base;
 204
 205         r_base = crtc->gamma_store;
 206         g_base = r_base + crtc->gamma_size;
 207         b_base = g_base + crtc->gamma_size;
 208
 209         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
 210 }
 211 #endif
 212
 213 #if 0
 214 int drm_fb_helper_debug_enter(struct fb_info *info)
 215 {
 216         struct drm_fb_helper *helper = info->par;
 217         struct drm_crtc_helper_funcs *funcs;
 218         int i;
 219
 220         if (list_empty(&kernel_fb_helper_list))
 221                 return false;
 222
 223         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 224                 for (i = 0; i < helper->crtc_count; i++) {
 225                         struct drm_mode_set *mode_set =
 226                                 &helper->crtc_info[i].mode_set;
 227
 228                         if (!mode_set->crtc->enabled)
 229                                 continue;
 230
 231                         funcs = mode_set->crtc->helper_private;
 232                         drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
 233                         funcs->mode_set_base_atomic(mode_set->crtc,
 234                                                     mode_set->fb,
 235                                                     mode_set->x,
 236                                                     mode_set->y,
 237                                                     ENTER_ATOMIC_MODE_SET);
 238                 }
 239         }
 240
 241         return 0;
 242 }
 243 #endif
 244
 245 #if 0
 246 /* Find the real fb for a given fb helper CRTC */
 247 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
 248 {
 249         struct drm_device *dev = crtc->dev;
 250         struct drm_crtc *c;
 251
 252         list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
 253                 if (crtc->base.id == c->base.id)
 254                         return c->fb;
 255         }
 256
 257         return NULL;
 258 }
 259 #endif
 260
 261 #if 0
 262 int drm_fb_helper_debug_leave(struct fb_info *info)
 263 {
 264         struct drm_fb_helper *helper = info->par;
 265         struct drm_crtc *crtc;
 266         struct drm_crtc_helper_funcs *funcs;
 267         struct drm_framebuffer *fb;
 268         int i;
 269
 270         for (i = 0; i < helper->crtc_count; i++) {
 271                 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
 272                 crtc = mode_set->crtc;
 273                 funcs = crtc->helper_private;
 274                 fb = drm_mode_config_fb(crtc);
 275
 276                 if (!crtc->enabled)
 277                         continue;
 278
 279                 if (!fb) {
 280                         DRM_ERROR("no fb to restore??\n");
 281                         continue;
 282                 }
 283
 284                 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
 285                 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
 286                                             crtc->y, LEAVE_ATOMIC_MODE_SET);
 287         }
 288
 289         return 0;
 290 }
 291 #endif
 292
 293 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 294 {
 295         bool error = false;
 296         int i, ret;
 297         for (i = 0; i < fb_helper->crtc_count; i++) {
 298                 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
 299                 ret = drm_crtc_helper_set_config(mode_set);
 300                 if (ret)
 301                         error = true;
 302         }
 303         return error;
 304 }
 305
 306 #if 0
 307 bool drm_fb_helper_force_kernel_mode(void)
 308 {
 309         bool ret, error = false;
 310         struct drm_fb_helper *helper;
 311
 312         if (list_empty(&kernel_fb_helper_list))
 313                 return false;
 314
 315         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 316                 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 317                         continue;
 318
 319                 ret = drm_fb_helper_restore_fbdev_mode(helper);
 320                 if (ret)
 321                         error = true;
 322         }
 323         return error;
 324 }
 325 #endif
 326
 327 #if 0
 328 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
 329                         void *panic_str)
 330 {
 331         printf("panic occurred, switching back to text console\n");
 332         return drm_fb_helper_force_kernel_mode();
 333         return 0;
 334 }
 335
 336 static struct notifier_block paniced = {
 337         .notifier_call = drm_fb_helper_panic,
 338 };
 339
 340 /**
 341  * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 342  *
 343  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 344  */
 345 void drm_fb_helper_restore(void)
 346 {
 347         bool ret;
 348         ret = drm_fb_helper_force_kernel_mode();
 349         if (ret == true)
 350                 DRM_ERROR("Failed to restore crtc configuration\n");
 351 }
 352
 353 #ifdef CONFIG_MAGIC_SYSRQ
 354 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
 355 {
 356         drm_fb_helper_restore();
 357 }
 358 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
 359
 360 static void drm_fb_helper_sysrq(int dummy1)
 361 {
 362         schedule_work(&drm_fb_helper_restore_work);
 363 }
 364
 365 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
 366         .handler = drm_fb_helper_sysrq,
 367         .help_msg = "force-fb(V)",
 368         .action_msg = "Restore framebuffer console",
 369 };
 370 #else
 371 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
 372 #endif
 373 #endif
 374
 375 #if 0
 376 static void drm_fb_helper_on(struct fb_info *info)
 377 {
 378         struct drm_fb_helper *fb_helper = info->par;
 379         struct drm_device *dev = fb_helper->dev;
 380         struct drm_crtc *crtc;
 381         struct drm_crtc_helper_funcs *crtc_funcs;
 382         struct drm_connector *connector;
 383         struct drm_encoder *encoder;
 384         int i, j;
 385
 386         /*
 387          * For each CRTC in this fb, turn the crtc on then,
 388          * find all associated encoders and turn them on.
 389          */
 390         sx_xlock(&dev->mode_config.mutex);
 391         for (i = 0; i < fb_helper->crtc_count; i++) {
 392                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 393                 crtc_funcs = crtc->helper_private;
 394
 395                 if (!crtc->enabled)
 396                         continue;
 397
 398                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 399
 400                 /* Walk the connectors & encoders on this fb turning them on */
 401                 for (j = 0; j < fb_helper->connector_count; j++) {
 402                         connector = fb_helper->connector_info[j]->connector;
 403                         connector->dpms = DRM_MODE_DPMS_ON;
 404                         drm_connector_property_set_value(connector,
 405                                                          dev->mode_config.dpms_property,
 406                                                          DRM_MODE_DPMS_ON);
 407                 }
 408                 /* Found a CRTC on this fb, now find encoders */
 409                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 410                         if (encoder->crtc == crtc) {
 411                                 struct drm_encoder_helper_funcs *encoder_funcs;
 412
 413                                 encoder_funcs = encoder->helper_private;
 414                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 415                         }
 416                 }
 417         }
 418         sx_xunlock(&dev->mode_config.mutex);
 419 }
 420 #endif
 421
 422 #if 0
 423 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
 424 {
 425         struct drm_fb_helper *fb_helper = info->par;
 426         struct drm_device *dev = fb_helper->dev;
 427         struct drm_crtc *crtc;
 428         struct drm_crtc_helper_funcs *crtc_funcs;
 429         struct drm_connector *connector;
 430         struct drm_encoder *encoder;
 431         int i, j;
 432
 433         /*
 434          * For each CRTC in this fb, find all associated encoders
 435          * and turn them off, then turn off the CRTC.
 436          */
 437         sx_xlock(&dev->mode_config.mutex);
 438         for (i = 0; i < fb_helper->crtc_count; i++) {
 439                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 440                 crtc_funcs = crtc->helper_private;
 441
 442                 if (!crtc->enabled)
 443                         continue;
 444
 445                 /* Walk the connectors on this fb and mark them off */
 446                 for (j = 0; j < fb_helper->connector_count; j++) {
 447                         connector = fb_helper->connector_info[j]->connector;
 448                         connector->dpms = dpms_mode;
 449                         drm_connector_property_set_value(connector,
 450                                                          dev->mode_config.dpms_property,
 451                                                          dpms_mode);
 452                 }
 453                 /* Found a CRTC on this fb, now find encoders */
 454                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 455                         if (encoder->crtc == crtc) {
 456                                 struct drm_encoder_helper_funcs *encoder_funcs;
 457
 458                                 encoder_funcs = encoder->helper_private;
 459                                 encoder_funcs->dpms(encoder, dpms_mode);
 460                         }
 461                 }
 462                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 463         }
 464         sx_xunlock(&dev->mode_config.mutex);
 465 }
 466 #endif
 467
 468 #if 0
 469 int drm_fb_helper_blank(int blank, struct fb_info *info)
 470 {
 471         switch (blank) {
 472         /* Display: On; HSync: On, VSync: On */
 473         case FB_BLANK_UNBLANK:
 474                 drm_fb_helper_on(info);
 475                 break;
 476         /* Display: Off; HSync: On, VSync: On */
 477         case FB_BLANK_NORMAL:
 478                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 479                 break;
 480         /* Display: Off; HSync: Off, VSync: On */
 481         case FB_BLANK_HSYNC_SUSPEND:
 482                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 483                 break;
 484         /* Display: Off; HSync: On, VSync: Off */
 485         case FB_BLANK_VSYNC_SUSPEND:
 486                 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
 487                 break;
 488         /* Display: Off; HSync: Off, VSync: Off */
 489         case FB_BLANK_POWERDOWN:
 490                 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
 491                 break;
 492         }
 493         return 0;
 494 }
 495 #endif
 496
 497 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
 498 {
 499         int i;
 500
 501         for (i = 0; i < helper->connector_count; i++)
 502                 free(helper->connector_info[i], DRM_MEM_KMS);
 503         free(helper->connector_info, DRM_MEM_KMS);
 504         for (i = 0; i < helper->crtc_count; i++) {
 505                 free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS);
 506                 if (helper->crtc_info[i].mode_set.mode)
 507                         drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
 508         }
 509         free(helper->crtc_info, DRM_MEM_KMS);
 510 }
 511
 512 int drm_fb_helper_init(struct drm_device *dev,
 513                        struct drm_fb_helper *fb_helper,
 514                        int crtc_count, int max_conn_count)
 515 {
 516         struct drm_crtc *crtc;
 517         int i;
 518
 519         fb_helper->dev = dev;
 520
 521         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 522
 523         fb_helper->crtc_info = malloc(crtc_count *
 524             sizeof(struct drm_fb_helper_crtc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 525
 526         fb_helper->crtc_count = crtc_count;
 527         fb_helper->connector_info = malloc(dev->mode_config.num_connector *
 528             sizeof(struct drm_fb_helper_connector *), DRM_MEM_KMS,
 529             M_WAITOK | M_ZERO);
 530         fb_helper->connector_count = 0;
 531
 532         for (i = 0; i < crtc_count; i++) {
 533                 fb_helper->crtc_info[i].mode_set.connectors =
 534                         malloc(max_conn_count * sizeof(struct drm_connector *),
 535                             DRM_MEM_KMS, M_WAITOK | M_ZERO);
 536
 537                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 538         }
 539
 540         i = 0;
 541         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 542                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 543                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 544                 i++;
 545         }
 546         fb_helper->conn_limit = max_conn_count;
 547         return 0;
 548 }
 549
 550 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 551 {
 552         if (!list_empty(&fb_helper->kernel_fb_list)) {
 553                 list_del(&fb_helper->kernel_fb_list);
 554                 if (list_empty(&kernel_fb_helper_list)) {
 555 #if 0
 556                         printk(KERN_INFO "drm: unregistered panic notifier\n");
 557                         atomic_notifier_chain_unregister(&panic_notifier_list,
 558                                                          &paniced);
 559                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 560 #endif
 561                 }
 562         }
 563
 564         drm_fb_helper_crtc_free(fb_helper);
 565
 566 }
 567
 568 #if 0
 569 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 570                      u16 blue, u16 regno, struct fb_info *info)
 571 {
 572         struct drm_fb_helper *fb_helper = info->par;
 573         struct drm_framebuffer *fb = fb_helper->fb;
 574         int pindex;
 575
 576         if (info->fix.visual == FB_VISUAL_trueCOLOR) {
 577                 u32 *palette;
 578                 u32 value;
 579                 /* place color in psuedopalette */
 580                 if (regno > 16)
 581                         return -EINVAL;
 582                 palette = (u32 *)info->pseudo_palette;
 583                 red >>= (16 - info->var.red.length);
 584                 green >>= (16 - info->var.green.length);
 585                 blue >>= (16 - info->var.blue.length);
 586                 value = (red << info->var.red.offset) |
 587                         (green << info->var.green.offset) |
 588                         (blue << info->var.blue.offset);
 589                 if (info->var.transp.length > 0) {
 590                         u32 mask = (1 << info->var.transp.length) - 1;
 591                         mask <<= info->var.transp.offset;
 592                         value |= mask;
 593                 }
 594                 palette[regno] = value;
 595                 return 0;
 596         }
 597
 598         pindex = regno;
 599
 600         if (fb->bits_per_pixel == 16) {
 601                 pindex = regno << 3;
 602
 603                 if (fb->depth == 16 && regno > 63)
 604                         return -EINVAL;
 605                 if (fb->depth == 15 && regno > 31)
 606                         return -EINVAL;
 607
 608                 if (fb->depth == 16) {
 609                         u16 r, g, b;
 610                         int i;
 611                         if (regno < 32) {
 612                                 for (i = 0; i < 8; i++)
 613                                         fb_helper->funcs->gamma_set(crtc, red,
 614                                                 green, blue, pindex + i);
 615                         }
 616
 617                         fb_helper->funcs->gamma_get(crtc, &r,
 618                                                     &g, &b,
 619                                                     pindex >> 1);
 620
 621                         for (i = 0; i < 4; i++)
 622                                 fb_helper->funcs->gamma_set(crtc, r,
 623                                                             green, b,
 624                                                             (pindex >> 1) + i);
 625                 }
 626         }
 627
 628         if (fb->depth != 16)
 629                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 630         return 0;
 631 }
 632 #endif
 633
 634 #if 0
 635 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 636 {
 637         struct drm_fb_helper *fb_helper = info->par;
 638         struct drm_crtc_helper_funcs *crtc_funcs;
 639         u16 *red, *green, *blue, *transp;
 640         struct drm_crtc *crtc;
 641         int i, j, rc = 0;
 642         int start;
 643
 644         for (i = 0; i < fb_helper->crtc_count; i++) {
 645                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 646                 crtc_funcs = crtc->helper_private;
 647
 648                 red = cmap->red;
 649                 green = cmap->green;
 650                 blue = cmap->blue;
 651                 transp = cmap->transp;
 652                 start = cmap->start;
 653
 654                 for (j = 0; j < cmap->len; j++) {
 655                         u16 hred, hgreen, hblue, htransp = 0xffff;
 656
 657                         hred = *red++;
 658                         hgreen = *green++;
 659                         hblue = *blue++;
 660
 661                         if (transp)
 662                                 htransp = *transp++;
 663
 664                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 665                         if (rc)
 666                                 return rc;
 667                 }
 668                 crtc_funcs->load_lut(crtc);
 669         }
 670         return rc;
 671 }
 672 #endif
 673
 674 #if 0
 675 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 676                             struct fb_info *info)
 677 {
 678         struct drm_fb_helper *fb_helper = info->par;
 679         struct drm_framebuffer *fb = fb_helper->fb;
 680         int depth;
 681
 682         if (var->pixclock != 0 || in_dbg_master())
 683                 return -EINVAL;
 684
 685         /* Need to resize the fb object !!! */
 686         if (var->bits_per_pixel > fb->bits_per_pixel ||
 687             var->xres > fb->width || var->yres > fb->height ||
 688             var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
 689                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 690                           "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
 691                           var->xres, var->yres, var->bits_per_pixel,
 692                           var->xres_virtual, var->yres_virtual,
 693                           fb->width, fb->height, fb->bits_per_pixel);
 694                 return -EINVAL;
 695         }
 696
 697         switch (var->bits_per_pixel) {
 698         case 16:
 699                 depth = (var->green.length == 6) ? 16 : 15;
 700                 break;
 701         case 32:
 702                 depth = (var->transp.length > 0) ? 32 : 24;
 703                 break;
 704         default:
 705                 depth = var->bits_per_pixel;
 706                 break;
 707         }
 708
 709         switch (depth) {
 710         case 8:
 711                 var->red.offset = 0;
 712                 var->green.offset = 0;
 713                 var->blue.offset = 0;
 714                 var->red.length = 8;
 715                 var->green.length = 8;
 716                 var->blue.length = 8;
 717                 var->transp.length = 0;
 718                 var->transp.offset = 0;
 719                 break;
 720         case 15:
 721                 var->red.offset = 10;
 722                 var->green.offset = 5;
 723                 var->blue.offset = 0;
 724                 var->red.length = 5;
 725                 var->green.length = 5;
 726                 var->blue.length = 5;
 727                 var->transp.length = 1;
 728                 var->transp.offset = 15;
 729                 break;
 730         case 16:
 731                 var->red.offset = 11;
 732                 var->green.offset = 5;
 733                 var->blue.offset = 0;
 734                 var->red.length = 5;
 735                 var->green.length = 6;
 736                 var->blue.length = 5;
 737                 var->transp.length = 0;
 738                 var->transp.offset = 0;
 739                 break;
 740         case 24:
 741                 var->red.offset = 16;
 742                 var->green.offset = 8;
 743                 var->blue.offset = 0;
 744                 var->red.length = 8;
 745                 var->green.length = 8;
 746                 var->blue.length = 8;
 747                 var->transp.length = 0;
 748                 var->transp.offset = 0;
 749                 break;
 750         case 32:
 751                 var->red.offset = 16;
 752                 var->green.offset = 8;
 753                 var->blue.offset = 0;
 754                 var->red.length = 8;
 755                 var->green.length = 8;
 756                 var->blue.length = 8;
 757                 var->transp.length = 8;
 758                 var->transp.offset = 24;
 759                 break;
 760         default:
 761                 return -EINVAL;
 762         }
 763         return 0;
 764 }
 765 #endif
 766
 767 #if 0
 768 /* this will let fbcon do the mode init */
 769 int drm_fb_helper_set_par(struct fb_info *info)
 770 {
 771         struct drm_fb_helper *fb_helper = info->par;
 772         struct drm_device *dev = fb_helper->dev;
 773         struct fb_var_screeninfo *var = &info->var;
 774         struct drm_crtc *crtc;
 775         int ret;
 776         int i;
 777
 778         if (var->pixclock != 0) {
 779                 DRM_ERROR("PIXEL CLOCK SET\n");
 780                 return -EINVAL;
 781         }
 782
 783         mutex_lock(&dev->mode_config.mutex);
 784         for (i = 0; i < fb_helper->crtc_count; i++) {
 785                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 786                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 787                 if (ret) {
 788                         mutex_unlock(&dev->mode_config.mutex);
 789                         return ret;
 790                 }
 791         }
 792         mutex_unlock(&dev->mode_config.mutex);
 793
 794         if (fb_helper->delayed_hotplug) {
 795                 fb_helper->delayed_hotplug = false;
 796                 drm_fb_helper_hotplug_event(fb_helper);
 797         }
 798         return 0;
 799 }
 800 #endif
 801
 802 #if 0
 803 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 804                               struct fb_info *info)
 805 {
 806         struct drm_fb_helper *fb_helper = info->par;
 807         struct drm_device *dev = fb_helper->dev;
 808         struct drm_mode_set *modeset;
 809         struct drm_crtc *crtc;
 810         int ret = 0;
 811         int i;
 812
 813         mutex_lock(&dev->mode_config.mutex);
 814         for (i = 0; i < fb_helper->crtc_count; i++) {
 815                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 816
 817                 modeset = &fb_helper->crtc_info[i].mode_set;
 818
 819                 modeset->x = var->xoffset;
 820                 modeset->y = var->yoffset;
 821
 822                 if (modeset->num_connectors) {
 823                         ret = crtc->funcs->set_config(modeset);
 824                         if (!ret) {
 825                                 info->var.xoffset = var->xoffset;
 826                                 info->var.yoffset = var->yoffset;
 827                         }
 828                 }
 829         }
 830         mutex_unlock(&dev->mode_config.mutex);
 831         return ret;
 832 }
 833 #endif
 834
 835 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 836                                   int preferred_bpp)
 837 {
 838         int new_fb = 0;
 839         int crtc_count = 0;
 840         int i;
 841         struct fb_info *info;
 842         struct drm_fb_helper_surface_size sizes;
 843         int gamma_size = 0;
 844         struct vt_kms_softc *sc;
 845         device_t kdev;
 846
 847         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 848         sizes.surface_depth = 24;
 849         sizes.surface_bpp = 32;
 850         sizes.fb_width = (unsigned)-1;
 851         sizes.fb_height = (unsigned)-1;
 852
 853         /* if driver picks 8 or 16 by default use that
 854            for both depth/bpp */
 855         if (preferred_bpp != sizes.surface_bpp) {
 856                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 857         }
 858         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 859         for (i = 0; i < fb_helper->connector_count; i++) {
 860                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 861                 struct drm_cmdline_mode *cmdline_mode;
 862
 863                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 864
 865                 if (cmdline_mode->bpp_specified) {
 866                         switch (cmdline_mode->bpp) {
 867                         case 8:
 868                                 sizes.surface_depth = sizes.surface_bpp = 8;
 869                                 break;
 870                         case 15:
 871                                 sizes.surface_depth = 15;
 872                                 sizes.surface_bpp = 16;
 873                                 break;
 874                         case 16:
 875                                 sizes.surface_depth = sizes.surface_bpp = 16;
 876                                 break;
 877                         case 24:
 878                                 sizes.surface_depth = sizes.surface_bpp = 24;
 879                                 break;
 880                         case 32:
 881                                 sizes.surface_depth = 24;
 882                                 sizes.surface_bpp = 32;
 883                                 break;
 884                         }
 885                         break;
 886                 }
 887         }
 888
 889         crtc_count = 0;
 890         for (i = 0; i < fb_helper->crtc_count; i++) {
 891                 struct drm_display_mode *desired_mode;
 892                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 893
 894                 if (desired_mode) {
 895                         if (gamma_size == 0)
 896                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 897                         if (desired_mode->hdisplay < sizes.fb_width)
 898                                 sizes.fb_width = desired_mode->hdisplay;
 899                         if (desired_mode->vdisplay < sizes.fb_height)
 900                                 sizes.fb_height = desired_mode->vdisplay;
 901                         if (desired_mode->hdisplay > sizes.surface_width)
 902                                 sizes.surface_width = desired_mode->hdisplay;
 903                         if (desired_mode->vdisplay > sizes.surface_height)
 904                                 sizes.surface_height = desired_mode->vdisplay;
 905                         crtc_count++;
 906                 }
 907         }
 908
 909         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
 910                 /* hmm everyone went away - assume VGA cable just fell out
 911                    and will come back later. */
 912                 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
 913                 sizes.fb_width = sizes.surface_width = 1024;
 914                 sizes.fb_height = sizes.surface_height = 768;
 915         }
 916
 917         /* push down into drivers */
 918         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
 919         if (new_fb < 0)
 920                 return new_fb;
 921
 922         sc = malloc(sizeof(struct vt_kms_softc), DRM_MEM_KMS,
 923             M_WAITOK | M_ZERO);
 924         sc->fb_helper = fb_helper;
 925         TASK_INIT(&sc->fb_mode_task, 0, vt_restore_fbdev_mode, sc);
 926
 927         info = fb_helper->fbdev;
 928
 929         info->fb_name = device_get_nameunit(fb_helper->dev->device);
 930         info->fb_depth = fb_helper->fb->bits_per_pixel;
 931         info->fb_height = fb_helper->fb->height;
 932         info->fb_width = fb_helper->fb->width;
 933         info->fb_stride = fb_helper->fb->pitches[0];
 934         info->fb_priv = sc;
 935         info->enter = &vt_kms_postswitch;
 936
 937         /* set the fb pointer */
 938         for (i = 0; i < fb_helper->crtc_count; i++) {
 939                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
 940         }
 941
 942         if (new_fb) {
 943                 device_t fbd;
 944                 int ret;
 945
 946                 kdev = fb_helper->dev->device;
 947                 fbd = device_add_child(kdev, "fbd", device_get_unit(kdev));
 948                 if (fbd != NULL)
 949                         ret = device_probe_and_attach(fbd);
 950                 else
 951                         ret = ENODEV;
 952 #ifdef DEV_VT
 953                 if (ret != 0)
 954                         DRM_ERROR("Failed to attach fbd device: %d\n", ret);
 955 #endif
 956         }
 957         return 0;
 958 }
 959
 960 #if 0
 961 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
 962                             uint32_t depth)
 963 {
 964         info->fix.type = FB_TYPE_PACKED_PIXELS;
 965         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
 966                 FB_VISUAL_trueCOLOR;
 967         info->fix.mmio_start = 0;
 968         info->fix.mmio_len = 0;
 969         info->fix.type_aux = 0;
 970         info->fix.xpanstep = 1; /* doing it in hw */
 971         info->fix.ypanstep = 1; /* doing it in hw */
 972         info->fix.ywrapstep = 0;
 973         info->fix.accel = FB_ACCEL_NONE;
 974         info->fix.type_aux = 0;
 975
 976         info->fix.line_length = pitch;
 977         return;
 978 }
 979
 980 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
 981                             uint32_t fb_width, uint32_t fb_height)
 982 {
 983         struct drm_framebuffer *fb = fb_helper->fb;
 984         info->pseudo_palette = fb_helper->pseudo_palette;
 985         info->var.xres_virtual = fb->width;
 986         info->var.yres_virtual = fb->height;
 987         info->var.bits_per_pixel = fb->bits_per_pixel;
 988         info->var.accel_flags = FB_ACCELF_TEXT;
 989         info->var.xoffset = 0;
 990         info->var.yoffset = 0;
 991         info->var.activate = FB_ACTIVATE_NOW;
 992         info->var.height = -1;
 993         info->var.width = -1;
 994
 995         switch (fb->depth) {
 996         case 8:
 997                 info->var.red.offset = 0;
 998                 info->var.green.offset = 0;
 999                 info->var.blue.offset = 0;
1000                 info->var.red.length = 8; /* 8bit DAC */
1001                 info->var.green.length = 8;
1002                 info->var.blue.length = 8;
1003                 info->var.transp.offset = 0;
1004                 info->var.transp.length = 0;
1005                 break;
1006         case 15:
1007                 info->var.red.offset = 10;
1008                 info->var.green.offset = 5;
1009                 info->var.blue.offset = 0;
1010                 info->var.red.length = 5;
1011                 info->var.green.length = 5;
1012                 info->var.blue.length = 5;
1013                 info->var.transp.offset = 15;
1014                 info->var.transp.length = 1;
1015                 break;
1016         case 16:
1017                 info->var.red.offset = 11;
1018                 info->var.green.offset = 5;
1019                 info->var.blue.offset = 0;
1020                 info->var.red.length = 5;
1021                 info->var.green.length = 6;
1022                 info->var.blue.length = 5;
1023                 info->var.transp.offset = 0;
1024                 break;
1025         case 24:
1026                 info->var.red.offset = 16;
1027                 info->var.green.offset = 8;
1028                 info->var.blue.offset = 0;
1029                 info->var.red.length = 8;
1030                 info->var.green.length = 8;
1031                 info->var.blue.length = 8;
1032                 info->var.transp.offset = 0;
1033                 info->var.transp.length = 0;
1034                 break;
1035         case 32:
1036                 info->var.red.offset = 16;
1037                 info->var.green.offset = 8;
1038                 info->var.blue.offset = 0;
1039                 info->var.red.length = 8;
1040                 info->var.green.length = 8;
1041                 info->var.blue.length = 8;
1042                 info->var.transp.offset = 24;
1043                 info->var.transp.length = 8;
1044                 break;
1045         default:
1046                 break;
1047         }
1048
1049         info->var.xres = fb_width;
1050         info->var.yres = fb_height;
1051 }
1052 #endif
1053
1054 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1055                                                uint32_t maxX,
1056                                                uint32_t maxY)
1057 {
1058         struct drm_connector *connector;
1059         int count = 0;
1060         int i;
1061
1062         for (i = 0; i < fb_helper->connector_count; i++) {
1063                 connector = fb_helper->connector_info[i]->connector;
1064                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1065         }
1066
1067         return count;
1068 }
1069
1070 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1071 {
1072         struct drm_display_mode *mode;
1073
1074         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1075                 if (drm_mode_width(mode) > width ||
1076                     drm_mode_height(mode) > height)
1077                         continue;
1078                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1079                         return mode;
1080         }
1081         return NULL;
1082 }
1083
1084 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1085 {
1086         struct drm_cmdline_mode *cmdline_mode;
1087         cmdline_mode = &fb_connector->cmdline_mode;
1088         return cmdline_mode->specified;
1089 }
1090
1091 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1092                                                       int width, int height)
1093 {
1094         struct drm_cmdline_mode *cmdline_mode;
1095         struct drm_display_mode *mode = NULL;
1096
1097         cmdline_mode = &fb_helper_conn->cmdline_mode;
1098         if (cmdline_mode->specified == false)
1099                         return (NULL);
1100
1101         /* attempt to find a matching mode in the list of modes
1102          *  we have gotten so far, if not add a CVT mode that conforms
1103          */
1104         if (cmdline_mode->rb || cmdline_mode->margins)
1105                 goto create_mode;
1106
1107         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1108                 /* check width/height */
1109                 if (mode->hdisplay != cmdline_mode->xres ||
1110                     mode->vdisplay != cmdline_mode->yres)
1111                         continue;
1112
1113                 if (cmdline_mode->refresh_specified) {
1114                         if (mode->vrefresh != cmdline_mode->refresh)
1115                                 continue;
1116                 }
1117
1118                 if (cmdline_mode->interlace) {
1119                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1120                                 continue;
1121                 }
1122                 return mode;
1123         }
1124
1125 create_mode:
1126         if (cmdline_mode->cvt)
1127                 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1128                                     cmdline_mode->xres, cmdline_mode->yres,
1129                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1130                                     cmdline_mode->rb, cmdline_mode->interlace,
1131                                     cmdline_mode->margins);
1132         else
1133                 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1134                                     cmdline_mode->xres, cmdline_mode->yres,
1135                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1136                                     cmdline_mode->interlace,
1137                                     cmdline_mode->margins);
1138         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1139         list_add(&mode->head, &fb_helper_conn->connector->modes);
1140         return mode;
1141 }
1142
1143 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1144 {
1145         bool enable;
1146
1147         if (strict) {
1148                 enable = connector->status == connector_status_connected;
1149         } else {
1150                 enable = connector->status != connector_status_disconnected;
1151         }
1152         return enable;
1153 }
1154
1155 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1156                                   bool *enabled)
1157 {
1158         bool any_enabled = false;
1159         struct drm_connector *connector;
1160         int i = 0;
1161
1162         for (i = 0; i < fb_helper->connector_count; i++) {
1163                 connector = fb_helper->connector_info[i]->connector;
1164                 enabled[i] = drm_connector_enabled(connector, true);
1165                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1166                           enabled[i] ? "yes" : "no");
1167                 any_enabled |= enabled[i];
1168         }
1169
1170         if (any_enabled)
1171                 return;
1172
1173         for (i = 0; i < fb_helper->connector_count; i++) {
1174                 connector = fb_helper->connector_info[i]->connector;
1175                 enabled[i] = drm_connector_enabled(connector, false);
1176         }
1177 }
1178
1179 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1180                               struct drm_display_mode **modes,
1181                               bool *enabled, int width, int height)
1182 {
1183         int count, i, j;
1184         bool can_clone = false;
1185         struct drm_fb_helper_connector *fb_helper_conn;
1186         struct drm_display_mode *dmt_mode, *mode;
1187
1188         /* only contemplate cloning in the single crtc case */
1189         if (fb_helper->crtc_count > 1)
1190                 return false;
1191
1192         count = 0;
1193         for (i = 0; i < fb_helper->connector_count; i++) {
1194                 if (enabled[i])
1195                         count++;
1196         }
1197
1198         /* only contemplate cloning if more than one connector is enabled */
1199         if (count <= 1)
1200                 return false;
1201
1202         /* check the command line or if nothing common pick 1024x768 */
1203         can_clone = true;
1204         for (i = 0; i < fb_helper->connector_count; i++) {
1205                 if (!enabled[i])
1206                         continue;
1207                 fb_helper_conn = fb_helper->connector_info[i];
1208                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1209                 if (!modes[i]) {
1210                         can_clone = false;
1211                         break;
1212                 }
1213                 for (j = 0; j < i; j++) {
1214                         if (!enabled[j])
1215                                 continue;
1216                         if (!drm_mode_equal(modes[j], modes[i]))
1217                                 can_clone = false;
1218                 }
1219         }
1220
1221         if (can_clone) {
1222                 DRM_DEBUG_KMS("can clone using command line\n");
1223                 return true;
1224         }
1225
1226         /* try and find a 1024x768 mode on each connector */
1227         can_clone = true;
1228         dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1229
1230         for (i = 0; i < fb_helper->connector_count; i++) {
1231
1232                 if (!enabled[i])
1233                         continue;
1234
1235                 fb_helper_conn = fb_helper->connector_info[i];
1236                 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1237                         if (drm_mode_equal(mode, dmt_mode))
1238                                 modes[i] = mode;
1239                 }
1240                 if (!modes[i])
1241                         can_clone = false;
1242         }
1243
1244         if (can_clone) {
1245                 DRM_DEBUG_KMS("can clone using 1024x768\n");
1246                 return true;
1247         }
1248         DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1249         return false;
1250 }
1251
1252 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1253                                  struct drm_display_mode **modes,
1254                                  bool *enabled, int width, int height)
1255 {
1256         struct drm_fb_helper_connector *fb_helper_conn;
1257         int i;
1258
1259         for (i = 0; i < fb_helper->connector_count; i++) {
1260                 fb_helper_conn = fb_helper->connector_info[i];
1261
1262                 if (enabled[i] == false)
1263                         continue;
1264
1265                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1266                               fb_helper_conn->connector->base.id);
1267
1268                 /* got for command line mode first */
1269                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1270                 if (!modes[i]) {
1271                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1272                                       fb_helper_conn->connector->base.id);
1273                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1274                 }
1275                 /* No preferred modes, pick one off the list */
1276                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1277                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1278                                 break;
1279                 }
1280                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1281                           "none");
1282         }
1283         return true;
1284 }
1285
1286 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1287                           struct drm_fb_helper_crtc **best_crtcs,
1288                           struct drm_display_mode **modes,
1289                           int n, int width, int height)
1290 {
1291         int c, o;
1292         struct drm_device *dev = fb_helper->dev;
1293         struct drm_connector *connector;
1294         struct drm_connector_helper_funcs *connector_funcs;
1295         struct drm_encoder *encoder;
1296         struct drm_fb_helper_crtc *best_crtc;
1297         int my_score, best_score, score;
1298         struct drm_fb_helper_crtc **crtcs, *crtc;
1299         struct drm_fb_helper_connector *fb_helper_conn;
1300
1301         if (n == fb_helper->connector_count)
1302                 return 0;
1303
1304         fb_helper_conn = fb_helper->connector_info[n];
1305         connector = fb_helper_conn->connector;
1306
1307         best_crtcs[n] = NULL;
1308         best_crtc = NULL;
1309         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1310         if (modes[n] == NULL)
1311                 return best_score;
1312
1313         crtcs = malloc(dev->mode_config.num_connector *
1314             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1315             M_WAITOK | M_ZERO);
1316
1317         my_score = 1;
1318         if (connector->status == connector_status_connected)
1319                 my_score++;
1320         if (drm_has_cmdline_mode(fb_helper_conn))
1321                 my_score++;
1322         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1323                 my_score++;
1324
1325         connector_funcs = connector->helper_private;
1326         encoder = connector_funcs->best_encoder(connector);
1327         if (!encoder)
1328                 goto out;
1329
1330         /* select a crtc for this connector and then attempt to configure
1331            remaining connectors */
1332         for (c = 0; c < fb_helper->crtc_count; c++) {
1333                 crtc = &fb_helper->crtc_info[c];
1334
1335                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1336                         continue;
1337                 }
1338
1339                 for (o = 0; o < n; o++)
1340                         if (best_crtcs[o] == crtc)
1341                                 break;
1342
1343                 if (o < n) {
1344                         /* ignore cloning unless only a single crtc */
1345                         if (fb_helper->crtc_count > 1)
1346                                 continue;
1347
1348                         if (!drm_mode_equal(modes[o], modes[n]))
1349                                 continue;
1350                 }
1351
1352                 crtcs[n] = crtc;
1353                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1354                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1355                                                   width, height);
1356                 if (score > best_score) {
1357                         best_crtc = crtc;
1358                         best_score = score;
1359                         memcpy(best_crtcs, crtcs,
1360                                dev->mode_config.num_connector *
1361                                sizeof(struct drm_fb_helper_crtc *));
1362                 }
1363         }
1364 out:
1365         free(crtcs, DRM_MEM_KMS);
1366         return best_score;
1367 }
1368
1369 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1370 {
1371         struct drm_device *dev = fb_helper->dev;
1372         struct drm_fb_helper_crtc **crtcs;
1373         struct drm_display_mode **modes;
1374         struct drm_encoder *encoder;
1375         struct drm_mode_set *modeset;
1376         bool *enabled;
1377         int width, height;
1378         int i, ret;
1379
1380         DRM_DEBUG_KMS("\n");
1381
1382         width = dev->mode_config.max_width;
1383         height = dev->mode_config.max_height;
1384
1385         /* clean out all the encoder/crtc combos */
1386         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1387                 encoder->crtc = NULL;
1388         }
1389
1390         crtcs = malloc(dev->mode_config.num_connector *
1391             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1392             M_WAITOK | M_ZERO);
1393         modes = malloc(dev->mode_config.num_connector *
1394             sizeof(struct drm_display_mode *), DRM_MEM_KMS,
1395             M_WAITOK | M_ZERO);
1396         enabled = malloc(dev->mode_config.num_connector *
1397             sizeof(bool), DRM_MEM_KMS, M_WAITOK | M_ZERO);
1398
1399         drm_enable_connectors(fb_helper, enabled);
1400
1401         ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1402         if (!ret) {
1403                 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1404                 if (!ret)
1405                         DRM_ERROR("Unable to find initial modes\n");
1406         }
1407
1408         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1409
1410         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1411
1412         /* need to set the modesets up here for use later */
1413         /* fill out the connector<->crtc mappings into the modesets */
1414         for (i = 0; i < fb_helper->crtc_count; i++) {
1415                 modeset = &fb_helper->crtc_info[i].mode_set;
1416                 modeset->num_connectors = 0;
1417         }
1418
1419         for (i = 0; i < fb_helper->connector_count; i++) {
1420                 struct drm_display_mode *mode = modes[i];
1421                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1422                 modeset = &fb_crtc->mode_set;
1423
1424                 if (mode && fb_crtc) {
1425                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1426                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1427                         fb_crtc->desired_mode = mode;
1428                         if (modeset->mode)
1429                                 drm_mode_destroy(dev, modeset->mode);
1430                         modeset->mode = drm_mode_duplicate(dev,
1431                                                            fb_crtc->desired_mode);
1432                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1433                 }
1434         }
1435
1436         free(crtcs, DRM_MEM_KMS);
1437         free(modes, DRM_MEM_KMS);
1438         free(enabled, DRM_MEM_KMS);
1439 }
1440
1441 /**
1442  * drm_helper_initial_config - setup a sane initial connector configuration
1443  * @dev: DRM device
1444  *
1445  * LOCKING:
1446  * Called at init time, must take mode config lock.
1447  *
1448  * Scan the CRTCs and connectors and try to put together an initial setup.
1449  * At the moment, this is a cloned configuration across all heads with
1450  * a new framebuffer object as the backing store.
1451  *
1452  * RETURNS:
1453  * Zero if everything went ok, nonzero otherwise.
1454  */
1455 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1456 {
1457         struct drm_device *dev = fb_helper->dev;
1458         int count = 0;
1459
1460         /* disable all the possible outputs/crtcs before entering KMS mode */
1461         drm_helper_disable_unused_functions(fb_helper->dev);
1462
1463         drm_fb_helper_parse_command_line(fb_helper);
1464
1465         count = drm_fb_helper_probe_connector_modes(fb_helper,
1466                                                     dev->mode_config.max_width,
1467                                                     dev->mode_config.max_height);
1468         /*
1469          * we shouldn't end up with no modes here.
1470          */
1471         if (count == 0) {
1472                 printf("No connectors reported connected with modes\n");
1473         }
1474         drm_setup_crtcs(fb_helper);
1475
1476         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1477 }
1478
1479 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1480 {
1481         struct drm_device *dev = fb_helper->dev;
1482         int count = 0;
1483         u32 max_width, max_height, bpp_sel;
1484         bool bound = false, crtcs_bound = false;
1485         struct drm_crtc *crtc;
1486
1487         if (!fb_helper->fb)
1488                 return 0;
1489
1490         sx_xlock(&dev->mode_config.mutex);
1491         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1492                 if (crtc->fb)
1493                         crtcs_bound = true;
1494                 if (crtc->fb == fb_helper->fb)
1495                         bound = true;
1496         }
1497
1498         if (!bound && crtcs_bound) {
1499                 fb_helper->delayed_hotplug = true;
1500                 sx_xunlock(&dev->mode_config.mutex);
1501                 return 0;
1502         }
1503         DRM_DEBUG_KMS("\n");
1504
1505         max_width = fb_helper->fb->width;
1506         max_height = fb_helper->fb->height;
1507         bpp_sel = fb_helper->fb->bits_per_pixel;
1508
1509         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1510                                                     max_height);
1511         drm_setup_crtcs(fb_helper);
1512         sx_xunlock(&dev->mode_config.mutex);
1513
1514         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1515 }
1516