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  * $FreeBSD: src/sys/dev/drm2/drm_fb_helper.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  31  */
  32
  33 #include <dev/drm2/drmP.h>
  34 #include <dev/drm2/drm_crtc.h>
  35 #include <dev/drm2/drm_fb_helper.h>
  36 #include <dev/drm2/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         drm_free(helper->crtc_info, DRM_MEM_KMS);
 560 }
 561
 562 int drm_fb_helper_init(struct drm_device *dev,
 563                        struct drm_fb_helper *fb_helper,
 564                        int crtc_count, int max_conn_count)
 565 {
 566         struct drm_crtc *crtc;
 567         int i;
 568
 569         fb_helper->dev = dev;
 570
 571         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 572
 573         fb_helper->crtc_info = kmalloc(crtc_count *
 574             sizeof(struct drm_fb_helper_crtc), DRM_MEM_KMS, M_WAITOK | M_ZERO);
 575
 576         fb_helper->crtc_count = crtc_count;
 577         fb_helper->connector_info = kmalloc(dev->mode_config.num_connector *
 578             sizeof(struct drm_fb_helper_connector *), DRM_MEM_KMS,
 579             M_WAITOK | M_ZERO);
 580         fb_helper->connector_count = 0;
 581
 582         for (i = 0; i < crtc_count; i++) {
 583                 fb_helper->crtc_info[i].mode_set.connectors =
 584                         kmalloc(max_conn_count * sizeof(struct drm_connector *),
 585                             DRM_MEM_KMS, M_WAITOK | M_ZERO);
 586
 587                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 588         }
 589
 590         i = 0;
 591         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 592                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 593                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 594                 i++;
 595         }
 596         fb_helper->conn_limit = max_conn_count;
 597         return 0;
 598 }
 599
 600 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 601 {
 602         if (!list_empty(&fb_helper->kernel_fb_list)) {
 603                 list_del(&fb_helper->kernel_fb_list);
 604                 if (list_empty(&kernel_fb_helper_list)) {
 605 #if 0
 606                         printk(KERN_INFO "drm: unregistered panic notifier\n");
 607                         atomic_notifier_chain_unregister(&panic_notifier_list,
 608                                                          &paniced);
 609                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 610 #endif
 611                 }
 612         }
 613
 614         drm_fb_helper_crtc_free(fb_helper);
 615
 616 }
 617
 618 #if 0
 619 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 620                      u16 blue, u16 regno, struct fb_info *info)
 621 {
 622         struct drm_fb_helper *fb_helper = info->par;
 623         struct drm_framebuffer *fb = fb_helper->fb;
 624         int pindex;
 625
 626         if (info->fix.visual == FB_VISUAL_trueCOLOR) {
 627                 u32 *palette;
 628                 u32 value;
 629                 /* place color in psuedopalette */
 630                 if (regno > 16)
 631                         return -EINVAL;
 632                 palette = (u32 *)info->pseudo_palette;
 633                 red >>= (16 - info->var.red.length);
 634                 green >>= (16 - info->var.green.length);
 635                 blue >>= (16 - info->var.blue.length);
 636                 value = (red << info->var.red.offset) |
 637                         (green << info->var.green.offset) |
 638                         (blue << info->var.blue.offset);
 639                 if (info->var.transp.length > 0) {
 640                         u32 mask = (1 << info->var.transp.length) - 1;
 641                         mask <<= info->var.transp.offset;
 642                         value |= mask;
 643                 }
 644                 palette[regno] = value;
 645                 return 0;
 646         }
 647
 648         pindex = regno;
 649
 650         if (fb->bits_per_pixel == 16) {
 651                 pindex = regno << 3;
 652
 653                 if (fb->depth == 16 && regno > 63)
 654                         return -EINVAL;
 655                 if (fb->depth == 15 && regno > 31)
 656                         return -EINVAL;
 657
 658                 if (fb->depth == 16) {
 659                         u16 r, g, b;
 660                         int i;
 661                         if (regno < 32) {
 662                                 for (i = 0; i < 8; i++)
 663                                         fb_helper->funcs->gamma_set(crtc, red,
 664                                                 green, blue, pindex + i);
 665                         }
 666
 667                         fb_helper->funcs->gamma_get(crtc, &r,
 668                                                     &g, &b,
 669                                                     pindex >> 1);
 670
 671                         for (i = 0; i < 4; i++)
 672                                 fb_helper->funcs->gamma_set(crtc, r,
 673                                                             green, b,
 674                                                             (pindex >> 1) + i);
 675                 }
 676         }
 677
 678         if (fb->depth != 16)
 679                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 680         return 0;
 681 }
 682 #endif
 683
 684 #if 0
 685 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 686 {
 687         struct drm_fb_helper *fb_helper = info->par;
 688         struct drm_crtc_helper_funcs *crtc_funcs;
 689         u16 *red, *green, *blue, *transp;
 690         struct drm_crtc *crtc;
 691         int i, j, rc = 0;
 692         int start;
 693
 694         for (i = 0; i < fb_helper->crtc_count; i++) {
 695                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 696                 crtc_funcs = crtc->helper_private;
 697
 698                 red = cmap->red;
 699                 green = cmap->green;
 700                 blue = cmap->blue;
 701                 transp = cmap->transp;
 702                 start = cmap->start;
 703
 704                 for (j = 0; j < cmap->len; j++) {
 705                         u16 hred, hgreen, hblue, htransp = 0xffff;
 706
 707                         hred = *red++;
 708                         hgreen = *green++;
 709                         hblue = *blue++;
 710
 711                         if (transp)
 712                                 htransp = *transp++;
 713
 714                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 715                         if (rc)
 716                                 return rc;
 717                 }
 718                 crtc_funcs->load_lut(crtc);
 719         }
 720         return rc;
 721 }
 722 #endif
 723
 724 #if 0
 725 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 726                             struct fb_info *info)
 727 {
 728         struct drm_fb_helper *fb_helper = info->par;
 729         struct drm_framebuffer *fb = fb_helper->fb;
 730         int depth;
 731
 732         if (var->pixclock != 0 || in_dbg_master())
 733                 return -EINVAL;
 734
 735         /* Need to resize the fb object !!! */
 736         if (var->bits_per_pixel > fb->bits_per_pixel ||
 737             var->xres > fb->width || var->yres > fb->height ||
 738             var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
 739                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 740                           "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
 741                           var->xres, var->yres, var->bits_per_pixel,
 742                           var->xres_virtual, var->yres_virtual,
 743                           fb->width, fb->height, fb->bits_per_pixel);
 744                 return -EINVAL;
 745         }
 746
 747         switch (var->bits_per_pixel) {
 748         case 16:
 749                 depth = (var->green.length == 6) ? 16 : 15;
 750                 break;
 751         case 32:
 752                 depth = (var->transp.length > 0) ? 32 : 24;
 753                 break;
 754         default:
 755                 depth = var->bits_per_pixel;
 756                 break;
 757         }
 758
 759         switch (depth) {
 760         case 8:
 761                 var->red.offset = 0;
 762                 var->green.offset = 0;
 763                 var->blue.offset = 0;
 764                 var->red.length = 8;
 765                 var->green.length = 8;
 766                 var->blue.length = 8;
 767                 var->transp.length = 0;
 768                 var->transp.offset = 0;
 769                 break;
 770         case 15:
 771                 var->red.offset = 10;
 772                 var->green.offset = 5;
 773                 var->blue.offset = 0;
 774                 var->red.length = 5;
 775                 var->green.length = 5;
 776                 var->blue.length = 5;
 777                 var->transp.length = 1;
 778                 var->transp.offset = 15;
 779                 break;
 780         case 16:
 781                 var->red.offset = 11;
 782                 var->green.offset = 5;
 783                 var->blue.offset = 0;
 784                 var->red.length = 5;
 785                 var->green.length = 6;
 786                 var->blue.length = 5;
 787                 var->transp.length = 0;
 788                 var->transp.offset = 0;
 789                 break;
 790         case 24:
 791                 var->red.offset = 16;
 792                 var->green.offset = 8;
 793                 var->blue.offset = 0;
 794                 var->red.length = 8;
 795                 var->green.length = 8;
 796                 var->blue.length = 8;
 797                 var->transp.length = 0;
 798                 var->transp.offset = 0;
 799                 break;
 800         case 32:
 801                 var->red.offset = 16;
 802                 var->green.offset = 8;
 803                 var->blue.offset = 0;
 804                 var->red.length = 8;
 805                 var->green.length = 8;
 806                 var->blue.length = 8;
 807                 var->transp.length = 8;
 808                 var->transp.offset = 24;
 809                 break;
 810         default:
 811                 return -EINVAL;
 812         }
 813         return 0;
 814 }
 815 #endif
 816
 817 #if 0
 818 /* this will let fbcon do the mode init */
 819 int drm_fb_helper_set_par(struct fb_info *info)
 820 {
 821         struct drm_fb_helper *fb_helper = info->par;
 822         struct drm_device *dev = fb_helper->dev;
 823         struct fb_var_screeninfo *var = &info->var;
 824         struct drm_crtc *crtc;
 825         int ret;
 826         int i;
 827
 828         if (var->pixclock != 0) {
 829                 DRM_ERROR("PIXEL CLOCK SET\n");
 830                 return -EINVAL;
 831         }
 832
 833         mutex_lock(&dev->mode_config.mutex);
 834         for (i = 0; i < fb_helper->crtc_count; i++) {
 835                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 836                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 837                 if (ret) {
 838                         mutex_unlock(&dev->mode_config.mutex);
 839                         return ret;
 840                 }
 841         }
 842         mutex_unlock(&dev->mode_config.mutex);
 843
 844         if (fb_helper->delayed_hotplug) {
 845                 fb_helper->delayed_hotplug = false;
 846                 drm_fb_helper_hotplug_event(fb_helper);
 847         }
 848         return 0;
 849 }
 850 #endif
 851
 852 #if 0
 853 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 854                               struct fb_info *info)
 855 {
 856         struct drm_fb_helper *fb_helper = info->par;
 857         struct drm_device *dev = fb_helper->dev;
 858         struct drm_mode_set *modeset;
 859         struct drm_crtc *crtc;
 860         int ret = 0;
 861         int i;
 862
 863         mutex_lock(&dev->mode_config.mutex);
 864         for (i = 0; i < fb_helper->crtc_count; i++) {
 865                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 866
 867                 modeset = &fb_helper->crtc_info[i].mode_set;
 868
 869                 modeset->x = var->xoffset;
 870                 modeset->y = var->yoffset;
 871
 872                 if (modeset->num_connectors) {
 873                         ret = crtc->funcs->set_config(modeset);
 874                         if (!ret) {
 875                                 info->var.xoffset = var->xoffset;
 876                                 info->var.yoffset = var->yoffset;
 877                         }
 878                 }
 879         }
 880         mutex_unlock(&dev->mode_config.mutex);
 881         return ret;
 882 }
 883 #endif
 884
 885 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 886                                   int preferred_bpp)
 887 {
 888         int new_fb = 0;
 889         int crtc_count = 0;
 890         int i;
 891 #if 0
 892         struct fb_info *info;
 893 #endif
 894         struct drm_fb_helper_surface_size sizes;
 895         int gamma_size = 0;
 896
 897         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 898         sizes.surface_depth = 24;
 899         sizes.surface_bpp = 32;
 900         sizes.fb_width = (unsigned)-1;
 901         sizes.fb_height = (unsigned)-1;
 902
 903         /* if driver picks 8 or 16 by default use that
 904            for both depth/bpp */
 905         if (preferred_bpp != sizes.surface_bpp) {
 906                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 907         }
 908         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 909         for (i = 0; i < fb_helper->connector_count; i++) {
 910                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 911                 struct drm_fb_helper_cmdline_mode *cmdline_mode;
 912
 913                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 914
 915                 if (cmdline_mode->bpp_specified) {
 916                         switch (cmdline_mode->bpp) {
 917                         case 8:
 918                                 sizes.surface_depth = sizes.surface_bpp = 8;
 919                                 break;
 920                         case 15:
 921                                 sizes.surface_depth = 15;
 922                                 sizes.surface_bpp = 16;
 923                                 break;
 924                         case 16:
 925                                 sizes.surface_depth = sizes.surface_bpp = 16;
 926                                 break;
 927                         case 24:
 928                                 sizes.surface_depth = sizes.surface_bpp = 24;
 929                                 break;
 930                         case 32:
 931                                 sizes.surface_depth = 24;
 932                                 sizes.surface_bpp = 32;
 933                                 break;
 934                         }
 935                         break;
 936                 }
 937         }
 938
 939         crtc_count = 0;
 940         for (i = 0; i < fb_helper->crtc_count; i++) {
 941                 struct drm_display_mode *desired_mode;
 942                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 943
 944                 if (desired_mode) {
 945                         if (gamma_size == 0)
 946                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 947                         if (desired_mode->hdisplay < sizes.fb_width)
 948                                 sizes.fb_width = desired_mode->hdisplay;
 949                         if (desired_mode->vdisplay < sizes.fb_height)
 950                                 sizes.fb_height = desired_mode->vdisplay;
 951                         if (desired_mode->hdisplay > sizes.surface_width)
 952                                 sizes.surface_width = desired_mode->hdisplay;
 953                         if (desired_mode->vdisplay > sizes.surface_height)
 954                                 sizes.surface_height = desired_mode->vdisplay;
 955                         crtc_count++;
 956                 }
 957         }
 958
 959         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
 960                 /* hmm everyone went away - assume VGA cable just fell out
 961                    and will come back later. */
 962                 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
 963                 sizes.fb_width = sizes.surface_width = 1024;
 964                 sizes.fb_height = sizes.surface_height = 768;
 965         }
 966
 967         /* push down into drivers */
 968         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
 969         if (new_fb < 0)
 970                 return new_fb;
 971
 972 #if 0
 973         info = fb_helper->fbdev;
 974 #endif
 975
 976         /* set the fb pointer */
 977         for (i = 0; i < fb_helper->crtc_count; i++) {
 978                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
 979         }
 980
 981 #if 0
 982         if (new_fb) {
 983                 info->var.pixclock = 0;
 984                 if (register_framebuffer(info) < 0) {
 985                         return -EINVAL;
 986                 }
 987
 988                 printf("fb%d: %s frame buffer device\n", info->node,
 989                        info->fix.id);
 990
 991         } else {
 992                 drm_fb_helper_set_par(info);
 993         }
 994
 995         /* Switch back to kernel console on panic */
 996         /* multi card linked list maybe */
 997         if (list_empty(&kernel_fb_helper_list)) {
 998                 printf("drm: registered panic notifier\n");
 999                 atomic_notifier_chain_register(&panic_notifier_list,
1000                                                &paniced);
1001         }
1002         if (new_fb)
1003                 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
1004 #endif
1005
1006         return 0;
1007 }
1008
1009 #if 0
1010 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
1011                             uint32_t depth)
1012 {
1013         info->fix.type = FB_TYPE_PACKED_PIXELS;
1014         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1015                 FB_VISUAL_trueCOLOR;
1016         info->fix.mmio_start = 0;
1017         info->fix.mmio_len = 0;
1018         info->fix.type_aux = 0;
1019         info->fix.xpanstep = 1; /* doing it in hw */
1020         info->fix.ypanstep = 1; /* doing it in hw */
1021         info->fix.ywrapstep = 0;
1022         info->fix.accel = FB_ACCEL_NONE;
1023         info->fix.type_aux = 0;
1024
1025         info->fix.line_length = pitch;
1026         return;
1027 }
1028
1029 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1030                             uint32_t fb_width, uint32_t fb_height)
1031 {
1032         struct drm_framebuffer *fb = fb_helper->fb;
1033         info->pseudo_palette = fb_helper->pseudo_palette;
1034         info->var.xres_virtual = fb->width;
1035         info->var.yres_virtual = fb->height;
1036         info->var.bits_per_pixel = fb->bits_per_pixel;
1037         info->var.accel_flags = FB_ACCELF_TEXT;
1038         info->var.xoffset = 0;
1039         info->var.yoffset = 0;
1040         info->var.activate = FB_ACTIVATE_NOW;
1041         info->var.height = -1;
1042         info->var.width = -1;
1043
1044         switch (fb->depth) {
1045         case 8:
1046                 info->var.red.offset = 0;
1047                 info->var.green.offset = 0;
1048                 info->var.blue.offset = 0;
1049                 info->var.red.length = 8; /* 8bit DAC */
1050                 info->var.green.length = 8;
1051                 info->var.blue.length = 8;
1052                 info->var.transp.offset = 0;
1053                 info->var.transp.length = 0;
1054                 break;
1055         case 15:
1056                 info->var.red.offset = 10;
1057                 info->var.green.offset = 5;
1058                 info->var.blue.offset = 0;
1059                 info->var.red.length = 5;
1060                 info->var.green.length = 5;
1061                 info->var.blue.length = 5;
1062                 info->var.transp.offset = 15;
1063                 info->var.transp.length = 1;
1064                 break;
1065         case 16:
1066                 info->var.red.offset = 11;
1067                 info->var.green.offset = 5;
1068                 info->var.blue.offset = 0;
1069                 info->var.red.length = 5;
1070                 info->var.green.length = 6;
1071                 info->var.blue.length = 5;
1072                 info->var.transp.offset = 0;
1073                 break;
1074         case 24:
1075                 info->var.red.offset = 16;
1076                 info->var.green.offset = 8;
1077                 info->var.blue.offset = 0;
1078                 info->var.red.length = 8;
1079                 info->var.green.length = 8;
1080                 info->var.blue.length = 8;
1081                 info->var.transp.offset = 0;
1082                 info->var.transp.length = 0;
1083                 break;
1084         case 32:
1085                 info->var.red.offset = 16;
1086                 info->var.green.offset = 8;
1087                 info->var.blue.offset = 0;
1088                 info->var.red.length = 8;
1089                 info->var.green.length = 8;
1090                 info->var.blue.length = 8;
1091                 info->var.transp.offset = 24;
1092                 info->var.transp.length = 8;
1093                 break;
1094         default:
1095                 break;
1096         }
1097
1098         info->var.xres = fb_width;
1099         info->var.yres = fb_height;
1100 }
1101 #endif
1102
1103 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
1104                                                uint32_t maxX,
1105                                                uint32_t maxY)
1106 {
1107         struct drm_connector *connector;
1108         int count = 0;
1109         int i;
1110
1111         for (i = 0; i < fb_helper->connector_count; i++) {
1112                 connector = fb_helper->connector_info[i]->connector;
1113                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1114         }
1115
1116         return count;
1117 }
1118
1119 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1120 {
1121         struct drm_display_mode *mode;
1122
1123         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1124                 if (drm_mode_width(mode) > width ||
1125                     drm_mode_height(mode) > height)
1126                         continue;
1127                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1128                         return mode;
1129         }
1130         return NULL;
1131 }
1132
1133 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1134 {
1135         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1136         cmdline_mode = &fb_connector->cmdline_mode;
1137         return cmdline_mode->specified;
1138 }
1139
1140 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1141                                                       int width, int height)
1142 {
1143         struct drm_cmdline_mode *cmdline_mode;
1144         struct drm_display_mode *mode = NULL;
1145
1146         cmdline_mode = &fb_helper_conn->cmdline_mode1;
1147         if (cmdline_mode->specified == false &&
1148             !drm_fetch_cmdline_mode_from_kenv(fb_helper_conn->connector,
1149             cmdline_mode))
1150                         return (NULL);
1151
1152         /* attempt to find a matching mode in the list of modes
1153          *  we have gotten so far, if not add a CVT mode that conforms
1154          */
1155         if (cmdline_mode->rb || cmdline_mode->margins)
1156                 goto create_mode;
1157
1158         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1159                 /* check width/height */
1160                 if (mode->hdisplay != cmdline_mode->xres ||
1161                     mode->vdisplay != cmdline_mode->yres)
1162                         continue;
1163
1164                 if (cmdline_mode->refresh_specified) {
1165                         if (mode->vrefresh != cmdline_mode->refresh)
1166                                 continue;
1167                 }
1168
1169                 if (cmdline_mode->interlace) {
1170                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1171                                 continue;
1172                 }
1173                 return mode;
1174         }
1175
1176 create_mode:
1177         if (cmdline_mode->cvt)
1178                 mode = drm_cvt_mode(fb_helper_conn->connector->dev,
1179                                     cmdline_mode->xres, cmdline_mode->yres,
1180                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1181                                     cmdline_mode->rb, cmdline_mode->interlace,
1182                                     cmdline_mode->margins);
1183         else
1184                 mode = drm_gtf_mode(fb_helper_conn->connector->dev,
1185                                     cmdline_mode->xres, cmdline_mode->yres,
1186                                     cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1187                                     cmdline_mode->interlace,
1188                                     cmdline_mode->margins);
1189         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1190         list_add(&mode->head, &fb_helper_conn->connector->modes);
1191         return mode;
1192 }
1193
1194 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1195 {
1196         bool enable;
1197
1198         if (strict) {
1199                 enable = connector->status == connector_status_connected;
1200         } else {
1201                 enable = connector->status != connector_status_disconnected;
1202         }
1203         return enable;
1204 }
1205
1206 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1207                                   bool *enabled)
1208 {
1209         bool any_enabled = false;
1210         struct drm_connector *connector;
1211         int i = 0;
1212
1213         for (i = 0; i < fb_helper->connector_count; i++) {
1214                 connector = fb_helper->connector_info[i]->connector;
1215                 enabled[i] = drm_connector_enabled(connector, true);
1216                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1217                           enabled[i] ? "yes" : "no");
1218                 any_enabled |= enabled[i];
1219         }
1220
1221         if (any_enabled)
1222                 return;
1223
1224         for (i = 0; i < fb_helper->connector_count; i++) {
1225                 connector = fb_helper->connector_info[i]->connector;
1226                 enabled[i] = drm_connector_enabled(connector, false);
1227         }
1228 }
1229
1230 static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
1231                               struct drm_display_mode **modes,
1232                               bool *enabled, int width, int height)
1233 {
1234         int count, i, j;
1235         bool can_clone = false;
1236         struct drm_fb_helper_connector *fb_helper_conn;
1237         struct drm_display_mode *dmt_mode, *mode;
1238
1239         /* only contemplate cloning in the single crtc case */
1240         if (fb_helper->crtc_count > 1)
1241                 return false;
1242
1243         count = 0;
1244         for (i = 0; i < fb_helper->connector_count; i++) {
1245                 if (enabled[i])
1246                         count++;
1247         }
1248
1249         /* only contemplate cloning if more than one connector is enabled */
1250         if (count <= 1)
1251                 return false;
1252
1253         /* check the command line or if nothing common pick 1024x768 */
1254         can_clone = true;
1255         for (i = 0; i < fb_helper->connector_count; i++) {
1256                 if (!enabled[i])
1257                         continue;
1258                 fb_helper_conn = fb_helper->connector_info[i];
1259                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1260                 if (!modes[i]) {
1261                         can_clone = false;
1262                         break;
1263                 }
1264                 for (j = 0; j < i; j++) {
1265                         if (!enabled[j])
1266                                 continue;
1267                         if (!drm_mode_equal(modes[j], modes[i]))
1268                                 can_clone = false;
1269                 }
1270         }
1271
1272         if (can_clone) {
1273                 DRM_DEBUG_KMS("can clone using command line\n");
1274                 return true;
1275         }
1276
1277         /* try and find a 1024x768 mode on each connector */
1278         can_clone = true;
1279         dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
1280
1281         for (i = 0; i < fb_helper->connector_count; i++) {
1282
1283                 if (!enabled[i])
1284                         continue;
1285
1286                 fb_helper_conn = fb_helper->connector_info[i];
1287                 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1288                         if (drm_mode_equal(mode, dmt_mode))
1289                                 modes[i] = mode;
1290                 }
1291                 if (!modes[i])
1292                         can_clone = false;
1293         }
1294
1295         if (can_clone) {
1296                 DRM_DEBUG_KMS("can clone using 1024x768\n");
1297                 return true;
1298         }
1299         DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
1300         return false;
1301 }
1302
1303 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1304                                  struct drm_display_mode **modes,
1305                                  bool *enabled, int width, int height)
1306 {
1307         struct drm_fb_helper_connector *fb_helper_conn;
1308         int i;
1309
1310         for (i = 0; i < fb_helper->connector_count; i++) {
1311                 fb_helper_conn = fb_helper->connector_info[i];
1312
1313                 if (enabled[i] == false)
1314                         continue;
1315
1316                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1317                               fb_helper_conn->connector->base.id);
1318
1319                 /* got for command line mode first */
1320                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1321                 if (!modes[i]) {
1322                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1323                                       fb_helper_conn->connector->base.id);
1324                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1325                 }
1326                 /* No preferred modes, pick one off the list */
1327                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1328                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1329                                 break;
1330                 }
1331                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1332                           "none");
1333         }
1334         return true;
1335 }
1336
1337 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1338                           struct drm_fb_helper_crtc **best_crtcs,
1339                           struct drm_display_mode **modes,
1340                           int n, int width, int height)
1341 {
1342         int c, o;
1343         struct drm_device *dev = fb_helper->dev;
1344         struct drm_connector *connector;
1345         struct drm_connector_helper_funcs *connector_funcs;
1346         struct drm_encoder *encoder;
1347         struct drm_fb_helper_crtc *best_crtc;
1348         int my_score, best_score, score;
1349         struct drm_fb_helper_crtc **crtcs, *crtc;
1350         struct drm_fb_helper_connector *fb_helper_conn;
1351
1352         if (n == fb_helper->connector_count)
1353                 return 0;
1354
1355         fb_helper_conn = fb_helper->connector_info[n];
1356         connector = fb_helper_conn->connector;
1357
1358         best_crtcs[n] = NULL;
1359         best_crtc = NULL;
1360         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1361         if (modes[n] == NULL)
1362                 return best_score;
1363
1364         crtcs = kmalloc(dev->mode_config.num_connector *
1365             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1366             M_WAITOK | M_ZERO);
1367
1368         my_score = 1;
1369         if (connector->status == connector_status_connected)
1370                 my_score++;
1371         if (drm_has_cmdline_mode(fb_helper_conn))
1372                 my_score++;
1373         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1374                 my_score++;
1375
1376         connector_funcs = connector->helper_private;
1377         encoder = connector_funcs->best_encoder(connector);
1378         if (!encoder)
1379                 goto out;
1380
1381         /* select a crtc for this connector and then attempt to configure
1382            remaining connectors */
1383         for (c = 0; c < fb_helper->crtc_count; c++) {
1384                 crtc = &fb_helper->crtc_info[c];
1385
1386                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1387                         continue;
1388                 }
1389
1390                 for (o = 0; o < n; o++)
1391                         if (best_crtcs[o] == crtc)
1392                                 break;
1393
1394                 if (o < n) {
1395                         /* ignore cloning unless only a single crtc */
1396                         if (fb_helper->crtc_count > 1)
1397                                 continue;
1398
1399                         if (!drm_mode_equal(modes[o], modes[n]))
1400                                 continue;
1401                 }
1402
1403                 crtcs[n] = crtc;
1404                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1405                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1406                                                   width, height);
1407                 if (score > best_score) {
1408                         best_crtc = crtc;
1409                         best_score = score;
1410                         memcpy(best_crtcs, crtcs,
1411                                dev->mode_config.num_connector *
1412                                sizeof(struct drm_fb_helper_crtc *));
1413                 }
1414         }
1415 out:
1416         drm_free(crtcs, DRM_MEM_KMS);
1417         return best_score;
1418 }
1419
1420 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1421 {
1422         struct drm_device *dev = fb_helper->dev;
1423         struct drm_fb_helper_crtc **crtcs;
1424         struct drm_display_mode **modes;
1425         struct drm_encoder *encoder;
1426         struct drm_mode_set *modeset;
1427         bool *enabled;
1428         int width, height;
1429         int i, ret;
1430
1431         DRM_DEBUG_KMS("\n");
1432
1433         width = dev->mode_config.max_width;
1434         height = dev->mode_config.max_height;
1435
1436         /* clean out all the encoder/crtc combos */
1437         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1438                 encoder->crtc = NULL;
1439         }
1440
1441         crtcs = kmalloc(dev->mode_config.num_connector *
1442             sizeof(struct drm_fb_helper_crtc *), DRM_MEM_KMS,
1443             M_WAITOK | M_ZERO);
1444         modes = kmalloc(dev->mode_config.num_connector *
1445             sizeof(struct drm_display_mode *), DRM_MEM_KMS,
1446             M_WAITOK | M_ZERO);
1447         enabled = kmalloc(dev->mode_config.num_connector *
1448             sizeof(bool), DRM_MEM_KMS, M_WAITOK | M_ZERO);
1449
1450         drm_enable_connectors(fb_helper, enabled);
1451
1452         ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
1453         if (!ret) {
1454                 ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1455                 if (!ret)
1456                         DRM_ERROR("Unable to find initial modes\n");
1457         }
1458
1459         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1460
1461         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1462
1463         /* need to set the modesets up here for use later */
1464         /* fill out the connector<->crtc mappings into the modesets */
1465         for (i = 0; i < fb_helper->crtc_count; i++) {
1466                 modeset = &fb_helper->crtc_info[i].mode_set;
1467                 modeset->num_connectors = 0;
1468         }
1469
1470         for (i = 0; i < fb_helper->connector_count; i++) {
1471                 struct drm_display_mode *mode = modes[i];
1472                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1473                 modeset = &fb_crtc->mode_set;
1474
1475                 if (mode && fb_crtc) {
1476                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1477                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1478                         fb_crtc->desired_mode = mode;
1479                         if (modeset->mode)
1480                                 drm_mode_destroy(dev, modeset->mode);
1481                         modeset->mode = drm_mode_duplicate(dev,
1482                                                            fb_crtc->desired_mode);
1483                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1484                 }
1485         }
1486
1487         drm_free(crtcs, DRM_MEM_KMS);
1488         drm_free(modes, DRM_MEM_KMS);
1489         drm_free(enabled, DRM_MEM_KMS);
1490 }
1491
1492 /**
1493  * drm_helper_initial_config - setup a sane initial connector configuration
1494  * @dev: DRM device
1495  *
1496  * LOCKING:
1497  * Called at init time, must take mode config lock.
1498  *
1499  * Scan the CRTCs and connectors and try to put together an initial setup.
1500  * At the moment, this is a cloned configuration across all heads with
1501  * a new framebuffer object as the backing store.
1502  *
1503  * RETURNS:
1504  * Zero if everything went ok, nonzero otherwise.
1505  */
1506 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1507 {
1508         struct drm_device *dev = fb_helper->dev;
1509         int count = 0;
1510
1511         /* disable all the possible outputs/crtcs before entering KMS mode */
1512         drm_helper_disable_unused_functions(fb_helper->dev);
1513
1514         drm_fb_helper_parse_command_line(fb_helper);
1515
1516         count = drm_fb_helper_probe_connector_modes(fb_helper,
1517                                                     dev->mode_config.max_width,
1518                                                     dev->mode_config.max_height);
1519         /*
1520          * we shouldn't end up with no modes here.
1521          */
1522         if (count == 0) {
1523                 kprintf("No connectors reported connected with modes\n");
1524         }
1525         drm_setup_crtcs(fb_helper);
1526
1527         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1528 }
1529
1530 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1531 {
1532         struct drm_device *dev = fb_helper->dev;
1533         int count = 0;
1534         u32 max_width, max_height, bpp_sel;
1535         bool bound = false, crtcs_bound = false;
1536         struct drm_crtc *crtc;
1537
1538         if (!fb_helper->fb)
1539                 return 0;
1540
1541         lockmgr(&dev->mode_config.lock, LK_EXCLUSIVE);
1542         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1543                 if (crtc->fb)
1544                         crtcs_bound = true;
1545                 if (crtc->fb == fb_helper->fb)
1546                         bound = true;
1547         }
1548
1549         if (!bound && crtcs_bound) {
1550                 fb_helper->delayed_hotplug = true;
1551                 lockmgr(&dev->mode_config.lock, LK_RELEASE);
1552                 return 0;
1553         }
1554         DRM_DEBUG_KMS("\n");
1555
1556         max_width = fb_helper->fb->width;
1557         max_height = fb_helper->fb->height;
1558         bpp_sel = fb_helper->fb->bits_per_pixel;
1559
1560         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1561                                                     max_height);
1562         drm_setup_crtcs(fb_helper);
1563         lockmgr(&dev->mode_config.lock, LK_RELEASE);
1564
1565         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1566 }
1567