sys/dev/drm/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  * $FreeBSD: src/sys/dev/drm2/drm_fb_helper.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  31  */
  32
  33 #include <drm/drmP.h>
  34 #include <drm/drm_crtc.h>
  35 #include <drm/drm_fb_helper.h>
  36 #include <drm/drm_crtc_helper.h>
  37
  38 static DRM_LIST_HEAD(kernel_fb_helper_list);
  39
  40 /* simple single crtc case helper function */
  41 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
  42 {
  43         struct drm_device *dev = fb_helper->dev;
  44         struct drm_connector *connector;
  45
  46         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  47                 struct drm_fb_helper_connector *fb_helper_connector;
  48
  49                 fb_helper_connector = kmalloc(
  50                     sizeof(struct drm_fb_helper_connector), DRM_MEM_KMS,
  51                     M_WAITOK | M_ZERO);
  52
  53                 fb_helper_connector->connector = connector;
  54                 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
  55         }
  56         return 0;
  57 }
  58
  59 const char *fb_mode_option;
  60
  61 /**
  62  * drm_fb_helper_connector_parse_command_line - parse command line for connector
  63  * @connector - connector to parse line for
  64  * @mode_option - per connector mode option
  65  *
  66  * This parses the connector specific then generic command lines for
  67  * modes and options to configure the connector.
  68  *
  69  * This uses the same parameters as the fb modedb.c, except for extra
  70  *      <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
  71  *
  72  * enable/enable Digital/disable bit at the end
  73  */
  74 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
  75                                                        const char *mode_option)
  76 {
  77         const char *name;
  78         unsigned int namelen;
  79         int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
  80         unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
  81         int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
  82         int i;
  83         enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
  84         struct drm_fb_helper_cmdline_mode *cmdline_mode;
  85         struct drm_connector *connector;
  86
  87         if (!fb_helper_conn)
  88                 return false;
  89         connector = fb_helper_conn->connector;
  90
  91         cmdline_mode = &fb_helper_conn->cmdline_mode;
  92         if (!mode_option)
  93                 mode_option = fb_mode_option;
  94
  95         if (!mode_option) {
  96                 cmdline_mode->specified = false;
  97                 return false;
  98         }
  99
 100         name = mode_option;
 101         namelen = strlen(name);
 102         for (i = namelen-1; i >= 0; i--) {
 103                 switch (name[i]) {
 104                 case '@':
 105                         namelen = i;
 106                         if (!refresh_specified && !bpp_specified &&
 107                             !yres_specified) {
 108                                 refresh = strtol(&name[i+1], NULL, 10);
 109                                 refresh_specified = 1;
 110                                 if (cvt || rb)
 111                                         cvt = 0;
 112                         } else
 113                                 goto done;
 114                         break;
 115                 case '-':
 116                         namelen = i;
 117                         if (!bpp_specified && !yres_specified) {
 118                                 bpp = strtol(&name[i+1], NULL, 10);
 119                                 bpp_specified = 1;
 120                                 if (cvt || rb)
 121                                         cvt = 0;
 122                         } else
 123                                 goto done;
 124                         break;
 125                 case 'x':
 126                         if (!yres_specified) {
 127                                 yres = strtol(&name[i+1], NULL, 10);
 128                                 yres_specified = 1;
 129                         } else
 130                                 goto done;
 131                 case '0' ... '9':
 132                         break;
 133                 case 'M':
 134                         if (!yres_specified)
 135                                 cvt = 1;
 136                         break;
 137                 case 'R':
 138                         if (cvt)
 139                                 rb = 1;
 140                         break;
 141                 case 'm':
 142                         if (!cvt)
 143                                 margins = 1;
 144                         break;
 145                 case 'i':
 146                         if (!cvt)
 147                                 interlace = 1;
 148                         break;
 149                 case 'e':
 150                         force = DRM_FORCE_ON;
 151                         break;
 152                 case 'D':
 153                         if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
 154                             (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
 155                                 force = DRM_FORCE_ON;
 156                         else
 157                                 force = DRM_FORCE_ON_DIGITAL;
 158                         break;
 159                 case 'd':
 160                         force = DRM_FORCE_OFF;
 161                         break;
 162                 default:
 163                         goto done;
 164                 }
 165         }
 166         if (i < 0 && yres_specified) {
 167                 xres = strtol(name, NULL, 10);
 168                 res_specified = 1;
 169         }
 170 done:
 171
 172         DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 173                 drm_get_connector_name(connector), xres, yres,
 174                 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
 175                 "", (margins) ? " with margins" : "", (interlace) ?
 176                 " interlaced" : "");
 177
 178         if (force) {
 179                 const char *s;
 180                 switch (force) {
 181                 case DRM_FORCE_OFF: s = "OFF"; break;
 182                 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
 183                 default:
 184                 case DRM_FORCE_ON: s = "ON"; break;
 185                 }
 186
 187                 DRM_INFO("forcing %s connector %s\n",
 188                          drm_get_connector_name(connector), s);
 189                 connector->force = force;
 190         }
 191
 192         if (res_specified) {
 193                 cmdline_mode->specified = true;
 194                 cmdline_mode->xres = xres;
 195                 cmdline_mode->yres = yres;
 196         }
 197
 198         if (refresh_specified) {
 199                 cmdline_mode->refresh_specified = true;
 200                 cmdline_mode->refresh = refresh;
 201         }
 202
 203         if (bpp_specified) {
 204                 cmdline_mode->bpp_specified = true;
 205                 cmdline_mode->bpp = bpp;
 206         }
 207         cmdline_mode->rb = rb ? true : false;
 208         cmdline_mode->cvt = cvt  ? true : false;
 209         cmdline_mode->interlace = interlace ? true : false;
 210
 211         return true;
 212 }
 213
 214 static int
 215 fb_get_options(const char *connector_name, char **option)
 216 {
 217
 218         return (1);
 219 }
 220
 221 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
 222 {
 223         struct drm_fb_helper_connector *fb_helper_conn;
 224         int i;
 225
 226         for (i = 0; i < fb_helper->connector_count; i++) {
 227                 char *option = NULL;
 228
 229                 fb_helper_conn = fb_helper->connector_info[i];
 230
 231                 /* do something on return - turn off connector maybe */
 232                 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
 233                         continue;
 234
 235                 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
 236         }
 237         return 0;
 238 }
 239
 240 #if 0
 241 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
 242 {
 243         uint16_t *r_base, *g_base, *b_base;
 244         int i;
 245
 246         r_base = crtc->gamma_store;
 247         g_base = r_base + crtc->gamma_size;
 248         b_base = g_base + crtc->gamma_size;
 249
 250         for (i = 0; i < crtc->gamma_size; i++)
 251                 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
 252 }
 253
 254 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
 255 {
 256         uint16_t *r_base, *g_base, *b_base;
 257
 258         r_base = crtc->gamma_store;
 259         g_base = r_base + crtc->gamma_size;
 260         b_base = g_base + crtc->gamma_size;
 261
 262         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
 263 }
 264 #endif
 265
 266 #if 0
 267 int drm_fb_helper_debug_enter(struct fb_info *info)
 268 {
 269         struct drm_fb_helper *helper = info->par;
 270         struct drm_crtc_helper_funcs *funcs;
 271         int i;
 272
 273         if (list_empty(&kernel_fb_helper_list))
 274                 return false;
 275
 276         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 277                 for (i = 0; i < helper->crtc_count; i++) {
 278                         struct drm_mode_set *mode_set =
 279                                 &helper->crtc_info[i].mode_set;
 280
 281                         if (!mode_set->crtc->enabled)
 282                                 continue;
 283
 284                         funcs = mode_set->crtc->helper_private;
 285                         drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
 286                         funcs->mode_set_base_atomic(mode_set->crtc,
 287                                                     mode_set->fb,
 288                                                     mode_set->x,
 289                                                     mode_set->y,
 290                                                     ENTER_ATOMIC_MODE_SET);
 291                 }
 292         }
 293
 294         return 0;
 295 }
 296 #endif
 297
 298 #if 0
 299 /* Find the real fb for a given fb helper CRTC */
 300 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
 301 {
 302         struct drm_device *dev = crtc->dev;
 303         struct drm_crtc *c;
 304
 305         list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
 306                 if (crtc->base.id == c->base.id)
 307                         return c->fb;
 308         }
 309
 310         return NULL;
 311 }
 312 #endif
 313
 314 #if 0
 315 int drm_fb_helper_debug_leave(struct fb_info *info)
 316 {
 317         struct drm_fb_helper *helper = info->par;
 318         struct drm_crtc *crtc;
 319         struct drm_crtc_helper_funcs *funcs;
 320         struct drm_framebuffer *fb;
 321         int i;
 322
 323         for (i = 0; i < helper->crtc_count; i++) {
 324                 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
 325                 crtc = mode_set->crtc;
 326                 funcs = crtc->helper_private;
 327                 fb = drm_mode_config_fb(crtc);
 328
 329                 if (!crtc->enabled)
 330                         continue;
 331
 332                 if (!fb) {
 333                         DRM_ERROR("no fb to restore??\n");
 334                         continue;
 335                 }
 336
 337                 drm_fb_helper_restore_lut_atomic(mode_set->crtc);
 338                 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
 339                                             crtc->y, LEAVE_ATOMIC_MODE_SET);
 340         }
 341
 342         return 0;
 343 }
 344 #endif
 345
 346 bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
 347 {
 348         bool error = false;
 349         int i, ret;
 350         for (i = 0; i < fb_helper->crtc_count; i++) {
 351                 struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
 352                 ret = drm_crtc_helper_set_config(mode_set);
 353                 if (ret)
 354                         error = true;
 355         }
 356         return error;
 357 }
 358
 359 #if 0
 360 bool drm_fb_helper_force_kernel_mode(void)
 361 {
 362         bool ret, error = false;
 363         struct drm_fb_helper *helper;
 364
 365         if (list_empty(&kernel_fb_helper_list))
 366                 return false;
 367
 368         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 369                 if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 370                         continue;
 371
 372                 ret = drm_fb_helper_restore_fbdev_mode(helper);
 373                 if (ret)
 374                         error = true;
 375         }
 376         return error;
 377 }
 378 #endif
 379
 380 #if 0
 381 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
 382                         void *panic_str)
 383 {
 384         printf("panic occurred, switching back to text console\n");
 385         return drm_fb_helper_force_kernel_mode();
 386         return 0;
 387 }
 388
 389 static struct notifier_block paniced = {
 390         .notifier_call = drm_fb_helper_panic,
 391 };
 392
 393 /**
 394  * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 395  *
 396  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 397  */
 398 void drm_fb_helper_restore(void)
 399 {
 400         bool ret;
 401         ret = drm_fb_helper_force_kernel_mode();
 402         if (ret == true)
 403                 DRM_ERROR("Failed to restore crtc configuration\n");
 404 }
 405
 406 #ifdef CONFIG_MAGIC_SYSRQ
 407 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
 408 {
 409         drm_fb_helper_restore();
 410 }
 411 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
 412
 413 static void drm_fb_helper_sysrq(int dummy1)
 414 {
 415         schedule_work(&drm_fb_helper_restore_work);
 416 }
 417
 418 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
 419         .handler = drm_fb_helper_sysrq,
 420         .help_msg = "force-fb(V)",
 421         .action_msg = "Restore framebuffer console",
 422 };
 423 #else
 424 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
 425 #endif
 426 #endif
 427
 428 #if 0
 429 static void drm_fb_helper_on(struct fb_info *info)
 430 {
 431         struct drm_fb_helper *fb_helper = info->par;
 432         struct drm_device *dev = fb_helper->dev;
 433         struct drm_crtc *crtc;
 434         struct drm_crtc_helper_funcs *crtc_funcs;
 435         struct drm_connector *connector;
 436         struct drm_encoder *encoder;
 437         int i, j;
 438
 439         /*
 440          * For each CRTC in this fb, turn the crtc on then,
 441          * find all associated encoders and turn them on.
 442          */
 443         sx_xlock(&dev->mode_config.mutex);
 444         for (i = 0; i < fb_helper->crtc_count; i++) {
 445                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 446                 crtc_funcs = crtc->helper_private;
 447
 448                 if (!crtc->enabled)
 449                         continue;
 450
 451                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 452
 453                 /* Walk the connectors & encoders on this fb turning them on */
 454                 for (j = 0; j < fb_helper->connector_count; j++) {
 455                         connector = fb_helper->connector_info[j]->connector;
 456                         connector->dpms = DRM_MODE_DPMS_ON;
 457                         drm_connector_property_set_value(connector,
 458                                                          dev->mode_config.dpms_property,
 459                                                          DRM_MODE_DPMS_ON);
 460                 }
 461                 /* Found a CRTC on this fb, now find encoders */
 462                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 463                         if (encoder->crtc == crtc) {
 464                                 struct drm_encoder_helper_funcs *encoder_funcs;
 465
 466                                 encoder_funcs = encoder->helper_private;
 467                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 468                         }
 469                 }
 470         }
 471         sx_xunlock(&dev->mode_config.mutex);
 472 }
 473 #endif
 474
 475 #if 0
 476 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
 477 {
 478         struct drm_fb_helper *fb_helper = info->par;
 479         struct drm_device *dev = fb_helper->dev;
 480         struct drm_crtc *crtc;
 481         struct drm_crtc_helper_funcs *crtc_funcs;
 482         struct drm_connector *connector;
 483         struct drm_encoder *encoder;
 484         int i, j;
 485
 486         /*
 487          * For each CRTC in this fb, find all associated encoders
 488          * and turn them off, then turn off the CRTC.
 489          */
 490         sx_xlock(&dev->mode_config.mutex);
 491         for (i = 0; i < fb_helper->crtc_count; i++) {
 492                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 493                 crtc_funcs = crtc->helper_private;
 494
 495                 if (!crtc->enabled)
 496                         continue;
 497
 498                 /* Walk the connectors on this fb and mark them off */
 499                 for (j = 0; j < fb_helper->connector_count; j++) {
 500                         connector = fb_helper->connector_info[j]->connector;
 501                         connector->dpms = dpms_mode;
 502                         drm_connector_property_set_value(connector,
 503                                                          dev->mode_config.dpms_property,
 504                                                          dpms_mode);
 505                 }
 506                 /* Found a CRTC on this fb, now find encoders */
 507                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 508                         if (encoder->crtc == crtc) {
 509                                 struct drm_encoder_helper_funcs *encoder_funcs;
 510
 511                                 encoder_funcs = encoder->helper_private;
 512                                 encoder_funcs->dpms(encoder, dpms_mode);
 513                         }
 514                 }
 515                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 516         }
 517         sx_xunlock(&dev->mode_config.mutex);
 518 }
 519 #endif
 520
 521 #if 0
 522 int drm_fb_helper_blank(int blank, struct fb_info *info)
 523 {
 524         switch (blank) {
 525         /* Display: On; HSync: On, VSync: On */
 526         case FB_BLANK_UNBLANK:
 527                 drm_fb_helper_on(info);
 528                 break;
 529         /* Display: Off; HSync: On, VSync: On */
 530         case FB_BLANK_NORMAL:
 531                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 532                 break;
 533         /* Display: Off; HSync: Off, VSync: On */
 534         case FB_BLANK_HSYNC_SUSPEND:
 535                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 536                 break;
 537         /* Display: Off; HSync: On, VSync: Off */
 538         case FB_BLANK_VSYNC_SUSPEND:
 539                 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
 540                 break;
 541         /* Display: Off; HSync: Off, VSync: Off */
 542         case FB_BLANK_POWERDOWN:
 543                 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
 544                 break;
 545         }
 546         return 0;
 547 }
 548 #endif
 549
 550 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
 551 {
 552         int i;
 553
 554         for (i = 0; i < helper->connector_count; i++)
 555                 drm_free(helper->connector_info[i], DRM_MEM_KMS);
 556         drm_free(helper->connector_info, DRM_MEM_KMS);
 557         for (i = 0; i < helper->crtc_count; i++) {
 558                 drm_free(helper->crtc_info[i].mode_set.connectors, DRM_MEM_KMS);
 559                 if (helper->crtc_info[i].mode_set.mode)
 560                         drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
 561         }
 562         drm_free(helper->crtc_info, DRM_MEM_KMS);
 563 }
 564
 565 int drm_fb_helper_init(struct drm_device *dev,
 566                        struct drm_fb_helper *fb_helper,
 567                        int crtc_count, int max_conn_count)
 568 {
 569         struct drm_crtc *crtc;
 570         int i;
 571
 572         fb_helper->dev = dev;
 573
 574         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 575
 576         fb_helper->crtc_info = kmalloc(crtc_count *
 577             sizeof(struct drm_fb_helper_crtc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 578
 579         fb_helper->crtc_count = crtc_count;
 580         fb_helper->connector_info = kmalloc(dev->mode_config.num_connector *
 581             sizeof(struct drm_fb_helper_connector *), DRM_MEM_KMS,
 582             M_WAITOK | M_ZERO);
 583         fb_helper->connector_count = 0;
 584
 585         for (i = 0; i < crtc_count; i++) {
 586                 fb_helper->crtc_info[i].mode_set.connectors =
 587                         kmalloc(max_conn_count * sizeof(struct drm_connector *),
 588                             DRM_MEM_KMS, M_WAITOK | M_ZERO);
 589
 590                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 591         }
 592
 593         i = 0;
 594         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 595                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 596                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 597                 i++;
 598         }
 599         fb_helper->conn_limit = max_conn_count;
 600         return 0;
 601 }
 602
 603 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 604 {
 605         if (!list_empty(&fb_helper->kernel_fb_list)) {
 606                 list_del(&fb_helper->kernel_fb_list);
 607                 if (list_empty(&kernel_fb_helper_list)) {
 608 #if 0
 609                         printk(KERN_INFO "drm: unregistered panic notifier\n");
 610                         atomic_notifier_chain_unregister(&panic_notifier_list,
 611                                                          &paniced);
 612                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 613 #endif
 614                 }
 615         }
 616
 617         drm_fb_helper_crtc_free(fb_helper);
 618
 619 }
 620
 621 #if 0
 622 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 623                      u16 blue, u16 regno, struct fb_info *info)
 624 {
 625         struct drm_fb_helper *fb_helper = info->par;
 626         struct drm_framebuffer *fb = fb_helper->fb;
 627         int pindex;
 628
 629         if (info->fix.visual == FB_VISUAL_trueCOLOR) {
 630                 u32 *palette;
 631                 u32 value;
 632                 /* place color in psuedopalette */
 633                 if (regno > 16)
 634                         return -EINVAL;
 635                 palette = (u32 *)info->pseudo_palette;
 636                 red >>= (16 - info->var.red.length);
 637                 green >>= (16 - info->var.green.length);
 638                 blue >>= (16 - info->var.blue.length);
 639                 value = (red << info->var.red.offset) |
 640                         (green << info->var.green.offset) |
 641                         (blue << info->var.blue.offset);
 642                 if (info->var.transp.length > 0) {
 643                         u32 mask = (1 << info->var.transp.length) - 1;
 644                         mask <<= info->var.transp.offset;
 645                         value |= mask;
 646                 }
 647                 palette[regno] = value;
 648                 return 0;
 649         }
 650
 651         pindex = regno;
 652
 653         if (fb->bits_per_pixel == 16) {
 654                 pindex = regno << 3;
 655
 656                 if (fb->depth == 16 && regno > 63)
 657                         return -EINVAL;
 658                 if (fb->depth == 15 && regno > 31)
 659                         return -EINVAL;
 660
 661                 if (fb->depth == 16) {
 662                         u16 r, g, b;
 663                         int i;
 664                         if (regno < 32) {
 665                                 for (i = 0; i < 8; i++)
 666                                         fb_helper->funcs->gamma_set(crtc, red,
 667                                                 green, blue, pindex + i);
 668                         }
 669
 670                         fb_helper->funcs->gamma_get(crtc, &r,
 671                                                     &g, &b,
 672                                                     pindex >> 1);
 673
 674                         for (i = 0; i < 4; i++)
 675                                 fb_helper->funcs->gamma_set(crtc, r,
 676                                                             green, b,
 677                                                             (pindex >> 1) + i);
 678                 }
 679         }
 680
 681         if (fb->depth != 16)
 682                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 683         return 0;
 684 }
 685 #endif
 686
 687 #if 0
 688 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 689 {
 690         struct drm_fb_helper *fb_helper = info->par;
 691         struct drm_crtc_helper_funcs *crtc_funcs;
 692         u16 *red, *green, *blue, *transp;
 693         struct drm_crtc *crtc;
 694         int i, j, rc = 0;
 695         int start;
 696
 697         for (i = 0; i < fb_helper->crtc_count; i++) {
 698                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 699                 crtc_funcs = crtc->helper_private;
 700
 701                 red = cmap->red;
 702                 green = cmap->green;
 703                 blue = cmap->blue;
 704                 transp = cmap->transp;
 705                 start = cmap->start;
 706
 707                 for (j = 0; j < cmap->len; j++) {
 708                         u16 hred, hgreen, hblue, htransp = 0xffff;
 709
 710                         hred = *red++;
 711                         hgreen = *green++;
 712                         hblue = *blue++;
 713
 714                         if (transp)
 715                                 htransp = *transp++;
 716
 717                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 718                         if (rc)
 719                                 return rc;
 720                 }
 721                 crtc_funcs->load_lut(crtc);
 722         }
 723         return rc;
 724 }
 725 #endif
 726
 727 #if 0
 728 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 729                             struct fb_info *info)
 730 {
 731         struct drm_fb_helper *fb_helper = info->par;
 732         struct drm_framebuffer *fb = fb_helper->fb;
 733         int depth;
 734
 735         if (var->pixclock != 0 || in_dbg_master())
 736                 return -EINVAL;
 737
 738         /* Need to resize the fb object !!! */
 739         if (var->bits_per_pixel > fb->bits_per_pixel ||
 740             var->xres > fb->width || var->yres > fb->height ||
 741             var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
 742                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 743                           "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
 744                           var->xres, var->yres, var->bits_per_pixel,
 745                           var->xres_virtual, var->yres_virtual,
 746                           fb->width, fb->height, fb->bits_per_pixel);
 747                 return -EINVAL;
 748         }
 749
 750         switch (var->bits_per_pixel) {
 751         case 16:
 752                 depth = (var->green.length == 6) ? 16 : 15;
 753                 break;
 754         case 32:
 755                 depth = (var->transp.length > 0) ? 32 : 24;
 756                 break;
 757         default:
 758                 depth = var->bits_per_pixel;
 759                 break;
 760         }
 761
 762         switch (depth) {
 763         case 8:
 764                 var->red.offset = 0;
 765                 var->green.offset = 0;
 766                 var->blue.offset = 0;
 767                 var->red.length = 8;
 768                 var->green.length = 8;
 769                 var->blue.length = 8;
 770                 var->transp.length = 0;
 771                 var->transp.offset = 0;
 772                 break;
 773         case 15:
 774                 var->red.offset = 10;
 775                 var->green.offset = 5;
 776                 var->blue.offset = 0;
 777                 var->red.length = 5;
 778                 var->green.length = 5;
 779                 var->blue.length = 5;
 780                 var->transp.length = 1;
 781                 var->transp.offset = 15;
 782                 break;
 783         case 16:
 784                 var->red.offset = 11;
 785                 var->green.offset = 5;
 786                 var->blue.offset = 0;
 787                 var->red.length = 5;
 788                 var->green.length = 6;
 789                 var->blue.length = 5;
 790                 var->transp.length = 0;
 791                 var->transp.offset = 0;
 792                 break;
 793         case 24:
 794                 var->red.offset = 16;
 795                 var->green.offset = 8;
 796                 var->blue.offset = 0;
 797                 var->red.length = 8;
 798                 var->green.length = 8;
 799                 var->blue.length = 8;
 800                 var->transp.length = 0;
 801                 var->transp.offset = 0;
 802                 break;
 803         case 32:
 804                 var->red.offset = 16;
 805                 var->green.offset = 8;
 806                 var->blue.offset = 0;
 807                 var->red.length = 8;
 808                 var->green.length = 8;
 809                 var->blue.length = 8;
 810                 var->transp.length = 8;
 811                 var->transp.offset = 24;
 812                 break;
 813         default:
 814                 return -EINVAL;
 815         }
 816         return 0;
 817 }
 818 #endif
 819
 820 #if 0
 821 /* this will let fbcon do the mode init */
 822 int drm_fb_helper_set_par(struct fb_info *info)
 823 {
 824         struct drm_fb_helper *fb_helper = info->par;
 825         struct drm_device *dev = fb_helper->dev;
 826         struct fb_var_screeninfo *var = &info->var;
 827         struct drm_crtc *crtc;
 828         int ret;
 829         int i;
 830
 831         if (var->pixclock != 0) {
 832                 DRM_ERROR("PIXEL CLOCK SET\n");
 833                 return -EINVAL;
 834         }
 835
 836         mutex_lock(&dev->mode_config.mutex);
 837         for (i = 0; i < fb_helper->crtc_count; i++) {
 838                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 839                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 840                 if (ret) {
 841                         mutex_unlock(&dev->mode_config.mutex);
 842                         return ret;
 843                 }
 844         }
 845         mutex_unlock(&dev->mode_config.mutex);
 846
 847         if (fb_helper->delayed_hotplug) {
 848                 fb_helper->delayed_hotplug = false;
 849                 drm_fb_helper_hotplug_event(fb_helper);
 850         }
 851         return 0;
 852 }
 853 #endif
 854
 855 #if 0
 856 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 857                               struct fb_info *info)
 858 {
 859         struct drm_fb_helper *fb_helper = info->par;
 860         struct drm_device *dev = fb_helper->dev;
 861         struct drm_mode_set *modeset;
 862         struct drm_crtc *crtc;
 863         int ret = 0;
 864         int i;
 865
 866         mutex_lock(&dev->mode_config.mutex);
 867         for (i = 0; i < fb_helper->crtc_count; i++) {
 868                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 869
 870                 modeset = &fb_helper->crtc_info[i].mode_set;
 871
 872                 modeset->x = var->xoffset;
 873                 modeset->y = var->yoffset;
 874
 875                 if (modeset->num_connectors) {
 876                         ret = crtc->funcs->set_config(modeset);
 877                         if (!ret) {
 878                                 info->var.xoffset = var->xoffset;
 879                                 info->var.yoffset = var->yoffset;
 880                         }
 881                 }
 882         }
 883         mutex_unlock(&dev->mode_config.mutex);
 884         return ret;
 885 }
 886 #endif
 887
 888 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 889                                   int preferred_bpp)
 890 {
 891         int new_fb = 0;
 892         int crtc_count = 0;
 893         int i;
 894 #if 0
 895         struct fb_info *info;
 896 #endif
 897         struct drm_fb_helper_surface_size sizes;
 898         int gamma_size = 0;
 899
 900         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 901         sizes.surface_depth = 24;
 902         sizes.surface_bpp = 32;
 903         sizes.fb_width = (unsigned)-1;
 904         sizes.fb_height = (unsigned)-1;
 905
 906         /* if driver picks 8 or 16 by default use that
 907            for both depth/bpp */
 908         if (preferred_bpp != sizes.surface_bpp) {
 909                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 910         }
 911         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 912         for (i = 0; i < fb_helper->connector_count; i++) {
 913                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 914                 struct drm_fb_helper_cmdline_mode *cmdline_mode;
 915
 916                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 917
 918                 if (cmdline_mode->bpp_specified) {
 919                         switch (cmdline_mode->bpp) {
 920                         case 8:
 921                                 sizes.surface_depth = sizes.surface_bpp = 8;
 922                                 break;
 923                         case 15:
 924                                 sizes.surface_depth = 15;
 925                                 sizes.surface_bpp = 16;
 926                                 break;
 927                         case 16:
 928                                 sizes.surface_depth = sizes.surface_bpp = 16;
 929                                 break;
 930                         case 24:
 931                                 sizes.surface_depth = sizes.surface_bpp = 24;
 932                                 break;
 933                         case 32:
 934                                 sizes.surface_depth = 24;
 935                                 sizes.surface_bpp = 32;
 936                                 break;
 937                         }
 938                         break;
 939                 }
 940         }
 941
 942         crtc_count = 0;
 943         for (i = 0; i < fb_helper->crtc_count; i++) {
 944                 struct drm_display_mode *desired_mode;
 945                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 946
 947                 if (desired_mode) {
 948                         if (gamma_size == 0)
 949                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 950                         if (desired_mode->hdisplay < sizes.fb_width)
 951                                 sizes.fb_width = desired_mode->hdisplay;
 952                         if (desired_mode->vdisplay < sizes.fb_height)
 953                                 sizes.fb_height = desired_mode->vdisplay;
 954                         if (desired_mode->hdisplay > sizes.surface_width)
 955                                 sizes.surface_width = desired_mode->hdisplay;
 956                         if (desired_mode->vdisplay > sizes.surface_height)
 957                                 sizes.surface_height = desired_mode->vdisplay;
 958                         crtc_count++;
 959                 }
 960         }
 961
 962         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
 963                 /* hmm everyone went away - assume VGA cable just fell out
 964                    and will come back later. */
 965                 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
 966                 sizes.fb_width = sizes.surface_width = 1024;
 967                 sizes.fb_height = sizes.surface_height = 768;
 968         }
 969
 970         /* push down into drivers */
 971         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
 972         if (new_fb < 0)
 973                 return new_fb;
 974
 975 #if 0
 976         info = fb_helper->fbdev;
 977 #endif
 978
 979         /* set the fb pointer */
 980         for (i = 0; i < fb_helper->crtc_count; i++) {
 981                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
 982         }
 983
 984 #if 0
 985         if (new_fb) {
 986                 info->var.pixclock = 0;
 987                 if (register_framebuffer(info) < 0) {
 988                         return -EINVAL;
 989                 }
 990
 991                 printf("fb%d: %s frame buffer device\n", info->node,
 992                        info->fix.id);
 993
 994         } else {
 995                 drm_fb_helper_set_par(info);
 996         }
 997
 998         /* Switch back to kernel console on panic */
 999         /* multi card linked list maybe */
1000         if (list_empty(&kernel_fb_helper_list)) {
1001                 printf("drm: registered panic notifier\n");
1002                 atomic_notifier_chain_register(&panic_notifier_list,
1003                                                &paniced);
1004         }
1005         if (new_fb)
1006                 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
1007 #endif
1008
1009         return 0;
1010 }
1011
1012 #if 0
1013 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
1014                             uint32_t depth)
1015 {
1016         info->fix.type = FB_TYPE_PACKED_PIXELS;
1017         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1018                 FB_VISUAL_trueCOLOR;
1019         info->fix.mmio_start = 0;
1020         info->fix.mmio_len = 0;
1021         info->fix.type_aux = 0;
1022         info->fix.xpanstep = 1; /* doing it in hw */
1023         info->fix.ypanstep = 1; /* doing it in hw */
1024         info->fix.ywrapstep = 0;
1025         info->fix.accel = FB_ACCEL_NONE;
1026         info->fix.type_aux = 0;
1027
1028         info->fix.line_length = pitch;
1029         return;
1030 }
1031
1032 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1033                             uint32_t fb_width, uint32_t fb_height)
1034 {
1035         struct drm_framebuffer *fb = fb_helper->fb;
1036         info->pseudo_palette = fb_helper->pseudo_palette;
1037         info->var.xres_virtual = fb->width;
1038         info->var.yres_virtual = fb->height;
1039         info->var.bits_per_pixel = fb->bits_per_pixel;
1040         info->var.accel_flags = FB_ACCELF_TEXT;
1041         info->var.xoffset = 0;
1042         info->var.yoffset = 0;
1043         info->var.activate = FB_ACTIVATE_NOW;
1044         info->var.height = -1;
1045         info->var.width = -1;
1046
1047         switch (fb->depth) {
1048         case 8:
1049                 info->var.red.offset = 0;
1050                 info->var.green.offset = 0;
1051                 info->var.blue.offset = 0;
1052                 info->var.red.length = 8; /* 8bit DAC */
1053                 info->var.green.length = 8;
1054                 info->var.blue.length = 8;
1055                 info->var.transp.offset = 0;
1056                 info->var.transp.length = 0;
1057                 break;
1058         case 15:
1059                 info->var.red.offset = 10;
1060                 info->var.green.offset = 5;
1061                 info->var.blue.offset = 0;
1062                 info->var.red.length = 5;
1063                 info->var.green.length = 5;
1064                 info->var.blue.length = 5;
1065                 info->var.transp.offset = 15;
1066                 info->var.transp.length = 1;
1067                 break;
1068         case 16:
1069                 info->var.red.offset = 11;
1070                 info->var.green.offset = 5;
1071                 info->var.blue.offset = 0;
1072                 info->var.red.length = 5;
1073                 info->var.green.length = 6;
1074                 info->var.blue.length = 5;
1075                 info->var.transp.offset = 0;
1076                 break;
1077         case 24:
1078                 info->var.red.offset = 16;
1079                 info->var.green.offset = 8;
1080                 info->var.blue.offset = 0;
1081                 info->var.red.length = 8;
1082                 info->var.green.length = 8;
1083                 info->var.blue.length = 8;
1084                 info->var.transp.offset = 0;
1085                 info->var.transp.length = 0;
1086                 break;
1087         case 32:
1088                 info->var.red.offset = 16;
1089                 info->var.green.offset = 8;
1090                 info->var.blue.offset = 0;
1091                 info->var.red.length = 8;
1092                 info->var.green.length = 8;
1093                 info->var.blue.length = 8;
1094                 info->var.transp.offset = 24;
1095                 info->var.transp.length = 8;
1096                 break;
1097         default:
1098                 break;
1099         }
1100
1101         info->var.xres = fb_width;
1102         info->var.yres = fb_height;
1103 }
1104 #endif
1105
1106 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1107                                                uint32_t maxX,
1108                                                uint32_t maxY)
1109 {
1110         struct drm_connector *connector;
1111         int count = 0;
1112         int i;
1113
1114         for (i = 0; i < fb_helper->connector_count; i++) {
1115                 connector = fb_helper->connector_info[i]->connector;
1116                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1117         }
1118
1119         return count;
1120 }
1121
1122 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1123 {
1124         struct drm_display_mode *mode;
1125
1126         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1127                 if (drm_mode_width(mode) > width ||
1128                     drm_mode_height(mode) > height)
1129                         continue;
1130                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1131                         return mode;
1132         }
1133         return NULL;
1134 }
1135
1136 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1137 {
1138         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1139         cmdline_mode = &fb_connector->cmdline_mode;
1140         return cmdline_mode->specified;
1141 }
1142
1143 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1144                                                       int width, int height)
1145 {
1146         struct drm_cmdline_mode *cmdline_mode;
1147         struct drm_display_mode *mode = NULL;
1148
1149         cmdline_mode = &fb_helper_conn->cmdline_mode1;
1150         if (cmdline_mode->specified == false &&
1151             !drm_fetch_cmdline_mode_from_kenv(fb_helper_conn->connector,
1152             cmdline_mode))
1153                         return (NULL);
1154
1155         /* attempt to find a matching mode in the list of modes
1156          *  we have gotten so far, if not add a CVT mode that conforms
1157          */
1158         if (cmdline_mode->rb || cmdline_mode->margins)
1159                 goto create_mode;
1160
1161         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1162                 /* check width/height */
1163                 if (mode->hdisplay != cmdline_mode->xres ||
1164                     mode->vdisplay != cmdline_mode->yres)
1165                         continue;
1166
1167                 if (cmdline_mode->refresh_specified) {
1168                         if (mode->vrefresh != cmdline_mode->refresh)
1169                                 continue;
1170                 }
1171
1172                 if (cmdline_mode->interlace) {
1173                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1174                                 continue;
1175                 }
1176                 return mode;
1177         }
1178
1179 create_mode:
1180         if (cmdline_mode->cvt)
1181                 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1182                                     cmdline_mode->xres, cmdline_mode->yres,
1183                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1184                                     cmdline_mode->rb, cmdline_mode->interlace,
1185                                     cmdline_mode->margins);
1186         else
1187                 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1188                                     cmdline_mode->xres, cmdline_mode->yres,
1189                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1190                                     cmdline_mode->interlace,
1191                                     cmdline_mode->margins);
1192         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1193         list_add(&mode->head, &fb_helper_conn->connector->modes);
1194         return mode;
1195 }
1196
1197 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1198 {
1199         bool enable;
1200
1201         if (strict) {
1202                 enable = connector->status == connector_status_connected;
1203         } else {
1204                 enable = connector->status != connector_status_disconnected;
1205         }
1206         return enable;
1207 }
1208
1209 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1210                                   bool *enabled)
1211 {
1212         bool any_enabled = false;
1213         struct drm_connector *connector;
1214         int i = 0;
1215
1216         for (i = 0; i < fb_helper->connector_count; i++) {
1217                 connector = fb_helper->connector_info[i]->connector;
1218                 enabled[i] = drm_connector_enabled(connector, true);
1219                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1220                           enabled[i] ? "yes" : "no");
1221                 any_enabled |= enabled[i];
1222         }
1223
1224         if (any_enabled)
1225                 return;
1226
1227         for (i = 0; i < fb_helper->connector_count; i++) {
1228                 connector = fb_helper->connector_info[i]->connector;
1229                 enabled[i] = drm_connector_enabled(connector, false);
1230         }
1231 }
1232
1233 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1234                               struct drm_display_mode **modes,
1235                               bool *enabled, int width, int height)
1236 {
1237         int count, i, j;
1238         bool can_clone = false;
1239         struct drm_fb_helper_connector *fb_helper_conn;
1240         struct drm_display_mode *dmt_mode, *mode;
1241
1242         /* only contemplate cloning in the single crtc case */
1243         if (fb_helper->crtc_count > 1)
1244                 return false;
1245
1246         count = 0;
1247         for (i = 0; i < fb_helper->connector_count; i++) {
1248                 if (enabled[i])
1249                         count++;
1250         }
1251
1252         /* only contemplate cloning if more than one connector is enabled */
1253         if (count <= 1)
1254                 return false;
1255
1256         /* check the command line or if nothing common pick 1024x768 */
1257         can_clone = true;
1258         for (i = 0; i < fb_helper->connector_count; i++) {
1259                 if (!enabled[i])
1260                         continue;
1261                 fb_helper_conn = fb_helper->connector_info[i];
1262                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1263                 if (!modes[i]) {
1264                         can_clone = false;
1265                         break;
1266                 }
1267                 for (j = 0; j < i; j++) {
1268                         if (!enabled[j])
1269                                 continue;
1270                         if (!drm_mode_equal(modes[j], modes[i]))
1271                                 can_clone = false;
1272                 }
1273         }
1274
1275         if (can_clone) {
1276                 DRM_DEBUG_KMS("can clone using command line\n");
1277                 return true;
1278         }
1279
1280         /* try and find a 1024x768 mode on each connector */
1281         can_clone = true;
1282         dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1283
1284         for (i = 0; i < fb_helper->connector_count; i++) {
1285
1286                 if (!enabled[i])
1287                         continue;
1288
1289                 fb_helper_conn = fb_helper->connector_info[i];
1290                 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1291                         if (drm_mode_equal(mode, dmt_mode))
1292                                 modes[i] = mode;
1293                 }
1294                 if (!modes[i])
1295                         can_clone = false;
1296         }
1297
1298         if (can_clone) {
1299                 DRM_DEBUG_KMS("can clone using 1024x768\n");
1300                 return true;
1301         }
1302         DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1303         return false;
1304 }
1305
1306 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1307                                  struct drm_display_mode **modes,
1308                                  bool *enabled, int width, int height)
1309 {
1310         struct drm_fb_helper_connector *fb_helper_conn;
1311         int i;
1312
1313         for (i = 0; i < fb_helper->connector_count; i++) {
1314                 fb_helper_conn = fb_helper->connector_info[i];
1315
1316                 if (enabled[i] == false)
1317                         continue;
1318
1319                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1320                               fb_helper_conn->connector->base.id);
1321
1322                 /* got for command line mode first */
1323                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1324                 if (!modes[i]) {
1325                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1326                                       fb_helper_conn->connector->base.id);
1327                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1328                 }
1329                 /* No preferred modes, pick one off the list */
1330                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1331                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1332                                 break;
1333                 }
1334                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1335                           "none");
1336         }
1337         return true;
1338 }
1339
1340 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1341                           struct drm_fb_helper_crtc **best_crtcs,
1342                           struct drm_display_mode **modes,
1343                           int n, int width, int height)
1344 {
1345         int c, o;
1346         struct drm_device *dev = fb_helper->dev;
1347         struct drm_connector *connector;
1348         struct drm_connector_helper_funcs *connector_funcs;
1349         struct drm_encoder *encoder;
1350         struct drm_fb_helper_crtc *best_crtc;
1351         int my_score, best_score, score;
1352         struct drm_fb_helper_crtc **crtcs, *crtc;
1353         struct drm_fb_helper_connector *fb_helper_conn;
1354
1355         if (n == fb_helper->connector_count)
1356                 return 0;
1357
1358         fb_helper_conn = fb_helper->connector_info[n];
1359         connector = fb_helper_conn->connector;
1360
1361         best_crtcs[n] = NULL;
1362         best_crtc = NULL;
1363         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1364         if (modes[n] == NULL)
1365                 return best_score;
1366
1367         crtcs = kmalloc(dev->mode_config.num_connector *
1368             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1369             M_WAITOK | M_ZERO);
1370
1371         my_score = 1;
1372         if (connector->status == connector_status_connected)
1373                 my_score++;
1374         if (drm_has_cmdline_mode(fb_helper_conn))
1375                 my_score++;
1376         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1377                 my_score++;
1378
1379         connector_funcs = connector->helper_private;
1380         encoder = connector_funcs->best_encoder(connector);
1381         if (!encoder)
1382                 goto out;
1383
1384         /* select a crtc for this connector and then attempt to configure
1385            remaining connectors */
1386         for (c = 0; c < fb_helper->crtc_count; c++) {
1387                 crtc = &fb_helper->crtc_info[c];
1388
1389                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1390                         continue;
1391                 }
1392
1393                 for (o = 0; o < n; o++)
1394                         if (best_crtcs[o] == crtc)
1395                                 break;
1396
1397                 if (o < n) {
1398                         /* ignore cloning unless only a single crtc */
1399                         if (fb_helper->crtc_count > 1)
1400                                 continue;
1401
1402                         if (!drm_mode_equal(modes[o], modes[n]))
1403                                 continue;
1404                 }
1405
1406                 crtcs[n] = crtc;
1407                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1408                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1409                                                   width, height);
1410                 if (score > best_score) {
1411                         best_crtc = crtc;
1412                         best_score = score;
1413                         memcpy(best_crtcs, crtcs,
1414                                dev->mode_config.num_connector *
1415                                sizeof(struct drm_fb_helper_crtc *));
1416                 }
1417         }
1418 out:
1419         drm_free(crtcs, DRM_MEM_KMS);
1420         return best_score;
1421 }
1422
1423 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1424 {
1425         struct drm_device *dev = fb_helper->dev;
1426         struct drm_fb_helper_crtc **crtcs;
1427         struct drm_display_mode **modes;
1428         struct drm_encoder *encoder;
1429         struct drm_mode_set *modeset;
1430         bool *enabled;
1431         int width, height;
1432         int i, ret;
1433
1434         DRM_DEBUG_KMS("\n");
1435
1436         width = dev->mode_config.max_width;
1437         height = dev->mode_config.max_height;
1438
1439         /* clean out all the encoder/crtc combos */
1440         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1441                 encoder->crtc = NULL;
1442         }
1443
1444         crtcs = kmalloc(dev->mode_config.num_connector *
1445             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1446             M_WAITOK | M_ZERO);
1447         modes = kmalloc(dev->mode_config.num_connector *
1448             sizeof(struct drm_display_mode *), DRM_MEM_KMS,
1449             M_WAITOK | M_ZERO);
1450         enabled = kmalloc(dev->mode_config.num_connector *
1451             sizeof(bool), DRM_MEM_KMS, M_WAITOK | M_ZERO);
1452
1453         drm_enable_connectors(fb_helper, enabled);
1454
1455         ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1456         if (!ret) {
1457                 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1458                 if (!ret)
1459                         DRM_ERROR("Unable to find initial modes\n");
1460         }
1461
1462         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1463
1464         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1465
1466         /* need to set the modesets up here for use later */
1467         /* fill out the connector<->crtc mappings into the modesets */
1468         for (i = 0; i < fb_helper->crtc_count; i++) {
1469                 modeset = &fb_helper->crtc_info[i].mode_set;
1470                 modeset->num_connectors = 0;
1471         }
1472
1473         for (i = 0; i < fb_helper->connector_count; i++) {
1474                 struct drm_display_mode *mode = modes[i];
1475                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1476                 modeset = &fb_crtc->mode_set;
1477
1478                 if (mode && fb_crtc) {
1479                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1480                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1481                         fb_crtc->desired_mode = mode;
1482                         if (modeset->mode)
1483                                 drm_mode_destroy(dev, modeset->mode);
1484                         modeset->mode = drm_mode_duplicate(dev,
1485                                                            fb_crtc->desired_mode);
1486                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1487                 }
1488         }
1489
1490         drm_free(crtcs, DRM_MEM_KMS);
1491         drm_free(modes, DRM_MEM_KMS);
1492         drm_free(enabled, DRM_MEM_KMS);
1493 }
1494
1495 /**
1496  * drm_helper_initial_config - setup a sane initial connector configuration
1497  * @dev: DRM device
1498  *
1499  * LOCKING:
1500  * Called at init time, must take mode config lock.
1501  *
1502  * Scan the CRTCs and connectors and try to put together an initial setup.
1503  * At the moment, this is a cloned configuration across all heads with
1504  * a new framebuffer object as the backing store.
1505  *
1506  * RETURNS:
1507  * Zero if everything went ok, nonzero otherwise.
1508  */
1509 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1510 {
1511         struct drm_device *dev = fb_helper->dev;
1512         int count = 0;
1513
1514         /* disable all the possible outputs/crtcs before entering KMS mode */
1515         drm_helper_disable_unused_functions(fb_helper->dev);
1516
1517         drm_fb_helper_parse_command_line(fb_helper);
1518
1519         count = drm_fb_helper_probe_connector_modes(fb_helper,
1520                                                     dev->mode_config.max_width,
1521                                                     dev->mode_config.max_height);
1522         /*
1523          * we shouldn't end up with no modes here.
1524          */
1525         if (count == 0) {
1526                 kprintf("No connectors reported connected with modes\n");
1527         }
1528         drm_setup_crtcs(fb_helper);
1529
1530         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1531 }
1532
1533 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1534 {
1535         struct drm_device *dev = fb_helper->dev;
1536         int count = 0;
1537         u32 max_width, max_height, bpp_sel;
1538         bool bound = false, crtcs_bound = false;
1539         struct drm_crtc *crtc;
1540
1541         if (!fb_helper->fb)
1542                 return 0;
1543
1544         lockmgr(&dev->mode_config.lock, LK_EXCLUSIVE);
1545         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1546                 if (crtc->fb)
1547                         crtcs_bound = true;
1548                 if (crtc->fb == fb_helper->fb)
1549                         bound = true;
1550         }
1551
1552         if (!bound && crtcs_bound) {
1553                 fb_helper->delayed_hotplug = true;
1554                 lockmgr(&dev->mode_config.lock, LK_RELEASE);
1555                 return 0;
1556         }
1557         DRM_DEBUG_KMS("\n");
1558
1559         max_width = fb_helper->fb->width;
1560         max_height = fb_helper->fb->height;
1561         bpp_sel = fb_helper->fb->bits_per_pixel;
1562
1563         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1564                                                     max_height);
1565         drm_setup_crtcs(fb_helper);
1566         lockmgr(&dev->mode_config.lock, LK_RELEASE);
1567
1568         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1569 }
1570