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