SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/gpu/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 #include <linux/kernel.h>
  31 #include <linux/sysrq.h>
  32 #include <linux/fb.h>
  33 #include "drmP.h"
  34 #include "drm_crtc.h"
  35 #include "drm_fb_helper.h"
  36 #include "drm_crtc_helper.h"
  37
  38 MODULE_AUTHOR("David Airlie, Jesse Barnes");
  39 MODULE_DESCRIPTION("DRM KMS helper");
  40 MODULE_LICENSE("GPL and additional rights");
  41
  42 static LIST_HEAD(kernel_fb_helper_list);
  43
  44 static struct slow_work_ops output_status_change_ops;
  45
  46 /* simple single crtc case helper function */
  47 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
  48 {
  49         struct drm_device *dev = fb_helper->dev;
  50         struct drm_connector *connector;
  51         int i;
  52
  53         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  54                 struct drm_fb_helper_connector *fb_helper_connector;
  55
  56                 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
  57                 if (!fb_helper_connector)
  58                         goto fail;
  59
  60                 fb_helper_connector->connector = connector;
  61                 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
  62         }
  63         return 0;
  64 fail:
  65         for (i = 0; i < fb_helper->connector_count; i++) {
  66                 kfree(fb_helper->connector_info[i]);
  67                 fb_helper->connector_info[i] = NULL;
  68         }
  69         fb_helper->connector_count = 0;
  70         return -ENOMEM;
  71 }
  72 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
  73
  74 /**
  75  * drm_fb_helper_connector_parse_command_line - parse command line for connector
  76  * @connector - connector to parse line for
  77  * @mode_option - per connector mode option
  78  *
  79  * This parses the connector specific then generic command lines for
  80  * modes and options to configure the connector.
  81  *
  82  * This uses the same parameters as the fb modedb.c, except for extra
  83  *      <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
  84  *
  85  * enable/enable Digital/disable bit at the end
  86  */
  87 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
  88                                                        const char *mode_option)
  89 {
  90         const char *name;
  91         unsigned int namelen;
  92         int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
  93         unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
  94         int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
  95         int i;
  96         enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
  97         struct drm_fb_helper_cmdline_mode *cmdline_mode;
  98         struct drm_connector *connector = fb_helper_conn->connector;
  99
 100         if (!fb_helper_conn)
 101                 return false;
 102
 103         cmdline_mode = &fb_helper_conn->cmdline_mode;
 104         if (!mode_option)
 105                 mode_option = fb_mode_option;
 106
 107         if (!mode_option) {
 108                 cmdline_mode->specified = false;
 109                 return false;
 110         }
 111
 112         name = mode_option;
 113         namelen = strlen(name);
 114         for (i = namelen-1; i >= 0; i--) {
 115                 switch (name[i]) {
 116                 case '@':
 117                         namelen = i;
 118                         if (!refresh_specified && !bpp_specified &&
 119                             !yres_specified) {
 120                                 refresh = simple_strtol(&name[i+1], NULL, 10);
 121                                 refresh_specified = 1;
 122                                 if (cvt || rb)
 123                                         cvt = 0;
 124                         } else
 125                                 goto done;
 126                         break;
 127                 case '-':
 128                         namelen = i;
 129                         if (!bpp_specified && !yres_specified) {
 130                                 bpp = simple_strtol(&name[i+1], NULL, 10);
 131                                 bpp_specified = 1;
 132                                 if (cvt || rb)
 133                                         cvt = 0;
 134                         } else
 135                                 goto done;
 136                         break;
 137                 case 'x':
 138                         if (!yres_specified) {
 139                                 yres = simple_strtol(&name[i+1], NULL, 10);
 140                                 yres_specified = 1;
 141                         } else
 142                                 goto done;
 143                 case '0' ... '9':
 144                         break;
 145                 case 'M':
 146                         if (!yres_specified)
 147                                 cvt = 1;
 148                         break;
 149                 case 'R':
 150                         if (!cvt)
 151                                 rb = 1;
 152                         break;
 153                 case 'm':
 154                         if (!cvt)
 155                                 margins = 1;
 156                         break;
 157                 case 'i':
 158                         if (!cvt)
 159                                 interlace = 1;
 160                         break;
 161                 case 'e':
 162                         force = DRM_FORCE_ON;
 163                         break;
 164                 case 'D':
 165                         if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
 166                             (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
 167                                 force = DRM_FORCE_ON;
 168                         else
 169                                 force = DRM_FORCE_ON_DIGITAL;
 170                         break;
 171                 case 'd':
 172                         force = DRM_FORCE_OFF;
 173                         break;
 174                 default:
 175                         goto done;
 176                 }
 177         }
 178         if (i < 0 && yres_specified) {
 179                 xres = simple_strtol(name, NULL, 10);
 180                 res_specified = 1;
 181         }
 182 done:
 183
 184         DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 185                 drm_get_connector_name(connector), xres, yres,
 186                 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
 187                 "", (margins) ? " with margins" : "", (interlace) ?
 188                 " interlaced" : "");
 189
 190         if (force) {
 191                 const char *s;
 192                 switch (force) {
 193                 case DRM_FORCE_OFF: s = "OFF"; break;
 194                 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
 195                 default:
 196                 case DRM_FORCE_ON: s = "ON"; break;
 197                 }
 198
 199                 DRM_INFO("forcing %s connector %s\n",
 200                          drm_get_connector_name(connector), s);
 201                 connector->force = force;
 202         }
 203
 204         if (res_specified) {
 205                 cmdline_mode->specified = true;
 206                 cmdline_mode->xres = xres;
 207                 cmdline_mode->yres = yres;
 208         }
 209
 210         if (refresh_specified) {
 211                 cmdline_mode->refresh_specified = true;
 212                 cmdline_mode->refresh = refresh;
 213         }
 214
 215         if (bpp_specified) {
 216                 cmdline_mode->bpp_specified = true;
 217                 cmdline_mode->bpp = bpp;
 218         }
 219         cmdline_mode->rb = rb ? true : false;
 220         cmdline_mode->cvt = cvt  ? true : false;
 221         cmdline_mode->interlace = interlace ? true : false;
 222
 223         return true;
 224 }
 225
 226 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
 227 {
 228         struct drm_fb_helper_connector *fb_helper_conn;
 229         int i;
 230
 231         for (i = 0; i < fb_helper->connector_count; i++) {
 232                 char *option = NULL;
 233
 234                 fb_helper_conn = fb_helper->connector_info[i];
 235
 236                 /* do something on return - turn off connector maybe */
 237                 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
 238                         continue;
 239
 240                 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
 241         }
 242         return 0;
 243 }
 244
 245 bool drm_fb_helper_force_kernel_mode(void)
 246 {
 247         int i = 0;
 248         bool ret, error = false;
 249         struct drm_fb_helper *helper;
 250
 251         if (list_empty(&kernel_fb_helper_list))
 252                 return false;
 253
 254         list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
 255                 for (i = 0; i < helper->crtc_count; i++) {
 256                         struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
 257                         ret = drm_crtc_helper_set_config(mode_set);
 258                         if (ret)
 259                                 error = true;
 260                 }
 261         }
 262         return error;
 263 }
 264
 265 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
 266                         void *panic_str)
 267 {
 268         DRM_ERROR("panic occurred, switching back to text console\n");
 269         return drm_fb_helper_force_kernel_mode();
 270         return 0;
 271 }
 272 EXPORT_SYMBOL(drm_fb_helper_panic);
 273
 274 static struct notifier_block paniced = {
 275         .notifier_call = drm_fb_helper_panic,
 276 };
 277
 278 /**
 279  * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 280  *
 281  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 282  */
 283 void drm_fb_helper_restore(void)
 284 {
 285         bool ret;
 286         ret = drm_fb_helper_force_kernel_mode();
 287         if (ret == true)
 288                 DRM_ERROR("Failed to restore crtc configuration\n");
 289 }
 290 EXPORT_SYMBOL(drm_fb_helper_restore);
 291
 292 #ifdef CONFIG_MAGIC_SYSRQ
 293 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
 294 {
 295         drm_fb_helper_restore();
 296 }
 297 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
 298
 299 static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
 300 {
 301         schedule_work(&drm_fb_helper_restore_work);
 302 }
 303
 304 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
 305         .handler = drm_fb_helper_sysrq,
 306         .help_msg = "force-fb(V)",
 307         .action_msg = "Restore framebuffer console",
 308 };
 309 #else
 310 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
 311 #endif
 312
 313 static void drm_fb_helper_on(struct fb_info *info)
 314 {
 315         struct drm_fb_helper *fb_helper = info->par;
 316         struct drm_device *dev = fb_helper->dev;
 317         struct drm_crtc *crtc;
 318         struct drm_crtc_helper_funcs *crtc_funcs;
 319         struct drm_encoder *encoder;
 320         int i;
 321
 322         /*
 323          * For each CRTC in this fb, turn the crtc on then,
 324          * find all associated encoders and turn them on.
 325          */
 326         mutex_lock(&dev->mode_config.mutex);
 327         for (i = 0; i < fb_helper->crtc_count; i++) {
 328                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 329                 crtc_funcs = crtc->helper_private;
 330
 331                 if (!crtc->enabled)
 332                         continue;
 333
 334                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 335
 336
 337                 /* Found a CRTC on this fb, now find encoders */
 338                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 339                         if (encoder->crtc == crtc) {
 340                                 struct drm_encoder_helper_funcs *encoder_funcs;
 341
 342                                 encoder_funcs = encoder->helper_private;
 343                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 344                         }
 345                 }
 346         }
 347         mutex_unlock(&dev->mode_config.mutex);
 348 }
 349
 350 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
 351 {
 352         struct drm_fb_helper *fb_helper = info->par;
 353         struct drm_device *dev = fb_helper->dev;
 354         struct drm_crtc *crtc;
 355         struct drm_crtc_helper_funcs *crtc_funcs;
 356         struct drm_encoder *encoder;
 357         int i;
 358
 359         /*
 360          * For each CRTC in this fb, find all associated encoders
 361          * and turn them off, then turn off the CRTC.
 362          */
 363         mutex_lock(&dev->mode_config.mutex);
 364         for (i = 0; i < fb_helper->crtc_count; i++) {
 365                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 366                 crtc_funcs = crtc->helper_private;
 367
 368                 if (!crtc->enabled)
 369                         continue;
 370
 371                 /* Found a CRTC on this fb, now find encoders */
 372                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 373                         if (encoder->crtc == crtc) {
 374                                 struct drm_encoder_helper_funcs *encoder_funcs;
 375
 376                                 encoder_funcs = encoder->helper_private;
 377                                 encoder_funcs->dpms(encoder, dpms_mode);
 378                         }
 379                 }
 380                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
 381         }
 382         mutex_unlock(&dev->mode_config.mutex);
 383 }
 384
 385 int drm_fb_helper_blank(int blank, struct fb_info *info)
 386 {
 387         switch (blank) {
 388         /* Display: On; HSync: On, VSync: On */
 389         case FB_BLANK_UNBLANK:
 390                 drm_fb_helper_on(info);
 391                 break;
 392         /* Display: Off; HSync: On, VSync: On */
 393         case FB_BLANK_NORMAL:
 394                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 395                 break;
 396         /* Display: Off; HSync: Off, VSync: On */
 397         case FB_BLANK_HSYNC_SUSPEND:
 398                 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
 399                 break;
 400         /* Display: Off; HSync: On, VSync: Off */
 401         case FB_BLANK_VSYNC_SUSPEND:
 402                 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
 403                 break;
 404         /* Display: Off; HSync: Off, VSync: Off */
 405         case FB_BLANK_POWERDOWN:
 406                 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
 407                 break;
 408         }
 409         return 0;
 410 }
 411 EXPORT_SYMBOL(drm_fb_helper_blank);
 412
 413 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
 414 {
 415         int i;
 416
 417         for (i = 0; i < helper->connector_count; i++)
 418                 kfree(helper->connector_info[i]);
 419         kfree(helper->connector_info);
 420         for (i = 0; i < helper->crtc_count; i++)
 421                 kfree(helper->crtc_info[i].mode_set.connectors);
 422         kfree(helper->crtc_info);
 423 }
 424
 425 int drm_fb_helper_init(struct drm_device *dev,
 426                        struct drm_fb_helper *fb_helper,
 427                        int crtc_count, int max_conn_count,
 428                        bool polled)
 429 {
 430         struct drm_crtc *crtc;
 431         int ret = 0;
 432         int i;
 433
 434         fb_helper->dev = dev;
 435         fb_helper->poll_enabled = polled;
 436
 437         slow_work_register_user(THIS_MODULE);
 438         delayed_slow_work_init(&fb_helper->output_status_change_slow_work,
 439                                &output_status_change_ops);
 440
 441         INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
 442
 443         fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
 444         if (!fb_helper->crtc_info)
 445                 return -ENOMEM;
 446
 447         fb_helper->crtc_count = crtc_count;
 448         fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
 449         if (!fb_helper->connector_info) {
 450                 kfree(fb_helper->crtc_info);
 451                 return -ENOMEM;
 452         }
 453         fb_helper->connector_count = 0;
 454
 455         for (i = 0; i < crtc_count; i++) {
 456                 fb_helper->crtc_info[i].mode_set.connectors =
 457                         kcalloc(max_conn_count,
 458                                 sizeof(struct drm_connector *),
 459                                 GFP_KERNEL);
 460
 461                 if (!fb_helper->crtc_info[i].mode_set.connectors) {
 462                         ret = -ENOMEM;
 463                         goto out_free;
 464                 }
 465                 fb_helper->crtc_info[i].mode_set.num_connectors = 0;
 466         }
 467
 468         i = 0;
 469         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 470                 fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 471                 fb_helper->crtc_info[i].mode_set.crtc = crtc;
 472                 i++;
 473         }
 474         fb_helper->conn_limit = max_conn_count;
 475         return 0;
 476 out_free:
 477         drm_fb_helper_crtc_free(fb_helper);
 478         return -ENOMEM;
 479 }
 480 EXPORT_SYMBOL(drm_fb_helper_init);
 481
 482 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
 483 {
 484         if (!list_empty(&fb_helper->kernel_fb_list)) {
 485                 list_del(&fb_helper->kernel_fb_list);
 486                 if (list_empty(&kernel_fb_helper_list)) {
 487                         printk(KERN_INFO "unregistered panic notifier\n");
 488                         atomic_notifier_chain_unregister(&panic_notifier_list,
 489                                                          &paniced);
 490                         unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 491                 }
 492         }
 493
 494         drm_fb_helper_crtc_free(fb_helper);
 495
 496         delayed_slow_work_cancel(&fb_helper->output_status_change_slow_work);
 497         slow_work_unregister_user(THIS_MODULE);
 498 }
 499 EXPORT_SYMBOL(drm_fb_helper_fini);
 500
 501 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 502                      u16 blue, u16 regno, struct fb_info *info)
 503 {
 504         struct drm_fb_helper *fb_helper = info->par;
 505         struct drm_framebuffer *fb = fb_helper->fb;
 506         int pindex;
 507
 508         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 509                 u32 *palette;
 510                 u32 value;
 511                 /* place color in psuedopalette */
 512                 if (regno > 16)
 513                         return -EINVAL;
 514                 palette = (u32 *)info->pseudo_palette;
 515                 red >>= (16 - info->var.red.length);
 516                 green >>= (16 - info->var.green.length);
 517                 blue >>= (16 - info->var.blue.length);
 518                 value = (red << info->var.red.offset) |
 519                         (green << info->var.green.offset) |
 520                         (blue << info->var.blue.offset);
 521                 palette[regno] = value;
 522                 return 0;
 523         }
 524
 525         pindex = regno;
 526
 527         if (fb->bits_per_pixel == 16) {
 528                 pindex = regno << 3;
 529
 530                 if (fb->depth == 16 && regno > 63)
 531                         return -EINVAL;
 532                 if (fb->depth == 15 && regno > 31)
 533                         return -EINVAL;
 534
 535                 if (fb->depth == 16) {
 536                         u16 r, g, b;
 537                         int i;
 538                         if (regno < 32) {
 539                                 for (i = 0; i < 8; i++)
 540                                         fb_helper->funcs->gamma_set(crtc, red,
 541                                                 green, blue, pindex + i);
 542                         }
 543
 544                         fb_helper->funcs->gamma_get(crtc, &r,
 545                                                     &g, &b,
 546                                                     pindex >> 1);
 547
 548                         for (i = 0; i < 4; i++)
 549                                 fb_helper->funcs->gamma_set(crtc, r,
 550                                                             green, b,
 551                                                             (pindex >> 1) + i);
 552                 }
 553         }
 554
 555         if (fb->depth != 16)
 556                 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
 557         return 0;
 558 }
 559
 560 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 561 {
 562         struct drm_fb_helper *fb_helper = info->par;
 563         struct drm_crtc_helper_funcs *crtc_funcs;
 564         u16 *red, *green, *blue, *transp;
 565         struct drm_crtc *crtc;
 566         int i, rc = 0;
 567         int start;
 568
 569         for (i = 0; i < fb_helper->crtc_count; i++) {
 570                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 571                 crtc_funcs = crtc->helper_private;
 572
 573                 red = cmap->red;
 574                 green = cmap->green;
 575                 blue = cmap->blue;
 576                 transp = cmap->transp;
 577                 start = cmap->start;
 578
 579                 for (i = 0; i < cmap->len; i++) {
 580                         u16 hred, hgreen, hblue, htransp = 0xffff;
 581
 582                         hred = *red++;
 583                         hgreen = *green++;
 584                         hblue = *blue++;
 585
 586                         if (transp)
 587                                 htransp = *transp++;
 588
 589                         rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
 590                         if (rc)
 591                                 return rc;
 592                 }
 593                 crtc_funcs->load_lut(crtc);
 594         }
 595         return rc;
 596 }
 597 EXPORT_SYMBOL(drm_fb_helper_setcmap);
 598
 599 int drm_fb_helper_setcolreg(unsigned regno,
 600                             unsigned red,
 601                             unsigned green,
 602                             unsigned blue,
 603                             unsigned transp,
 604                             struct fb_info *info)
 605 {
 606         struct drm_fb_helper *fb_helper = info->par;
 607         struct drm_crtc *crtc;
 608         struct drm_crtc_helper_funcs *crtc_funcs;
 609         int i;
 610         int ret;
 611
 612         if (regno > 255)
 613                 return 1;
 614
 615         for (i = 0; i < fb_helper->crtc_count; i++) {
 616                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 617                 crtc_funcs = crtc->helper_private;
 618
 619                 ret = setcolreg(crtc, red, green, blue, regno, info);
 620                 if (ret)
 621                         return ret;
 622
 623                 crtc_funcs->load_lut(crtc);
 624         }
 625         return 0;
 626 }
 627 EXPORT_SYMBOL(drm_fb_helper_setcolreg);
 628
 629 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 630                             struct fb_info *info)
 631 {
 632         struct drm_fb_helper *fb_helper = info->par;
 633         struct drm_framebuffer *fb = fb_helper->fb;
 634         int depth;
 635
 636         if (var->pixclock != 0)
 637                 return -EINVAL;
 638
 639         /* Need to resize the fb object !!! */
 640         if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
 641                 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
 642                           "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
 643                           fb->width, fb->height, fb->bits_per_pixel);
 644                 return -EINVAL;
 645         }
 646
 647         switch (var->bits_per_pixel) {
 648         case 16:
 649                 depth = (var->green.length == 6) ? 16 : 15;
 650                 break;
 651         case 32:
 652                 depth = (var->transp.length > 0) ? 32 : 24;
 653                 break;
 654         default:
 655                 depth = var->bits_per_pixel;
 656                 break;
 657         }
 658
 659         switch (depth) {
 660         case 8:
 661                 var->red.offset = 0;
 662                 var->green.offset = 0;
 663                 var->blue.offset = 0;
 664                 var->red.length = 8;
 665                 var->green.length = 8;
 666                 var->blue.length = 8;
 667                 var->transp.length = 0;
 668                 var->transp.offset = 0;
 669                 break;
 670         case 15:
 671                 var->red.offset = 10;
 672                 var->green.offset = 5;
 673                 var->blue.offset = 0;
 674                 var->red.length = 5;
 675                 var->green.length = 5;
 676                 var->blue.length = 5;
 677                 var->transp.length = 1;
 678                 var->transp.offset = 15;
 679                 break;
 680         case 16:
 681                 var->red.offset = 11;
 682                 var->green.offset = 5;
 683                 var->blue.offset = 0;
 684                 var->red.length = 5;
 685                 var->green.length = 6;
 686                 var->blue.length = 5;
 687                 var->transp.length = 0;
 688                 var->transp.offset = 0;
 689                 break;
 690         case 24:
 691                 var->red.offset = 16;
 692                 var->green.offset = 8;
 693                 var->blue.offset = 0;
 694                 var->red.length = 8;
 695                 var->green.length = 8;
 696                 var->blue.length = 8;
 697                 var->transp.length = 0;
 698                 var->transp.offset = 0;
 699                 break;
 700         case 32:
 701                 var->red.offset = 16;
 702                 var->green.offset = 8;
 703                 var->blue.offset = 0;
 704                 var->red.length = 8;
 705                 var->green.length = 8;
 706                 var->blue.length = 8;
 707                 var->transp.length = 8;
 708                 var->transp.offset = 24;
 709                 break;
 710         default:
 711                 return -EINVAL;
 712         }
 713         return 0;
 714 }
 715 EXPORT_SYMBOL(drm_fb_helper_check_var);
 716
 717 /* this will let fbcon do the mode init */
 718 int drm_fb_helper_set_par(struct fb_info *info)
 719 {
 720         struct drm_fb_helper *fb_helper = info->par;
 721         struct drm_device *dev = fb_helper->dev;
 722         struct fb_var_screeninfo *var = &info->var;
 723         struct drm_crtc *crtc;
 724         int ret;
 725         int i;
 726
 727         if (var->pixclock != 0) {
 728                 DRM_ERROR("PIXEL CLOCK SET\n");
 729                 return -EINVAL;
 730         }
 731
 732         mutex_lock(&dev->mode_config.mutex);
 733         for (i = 0; i < fb_helper->crtc_count; i++) {
 734                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 735                 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
 736                 if (ret) {
 737                         mutex_unlock(&dev->mode_config.mutex);
 738                         return ret;
 739                 }
 740         }
 741         mutex_unlock(&dev->mode_config.mutex);
 742
 743         if (fb_helper->delayed_hotplug) {
 744                 fb_helper->delayed_hotplug = false;
 745                 delayed_slow_work_enqueue(&fb_helper->output_status_change_slow_work, 0);
 746         }
 747         return 0;
 748 }
 749 EXPORT_SYMBOL(drm_fb_helper_set_par);
 750
 751 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 752                               struct fb_info *info)
 753 {
 754         struct drm_fb_helper *fb_helper = info->par;
 755         struct drm_device *dev = fb_helper->dev;
 756         struct drm_mode_set *modeset;
 757         struct drm_crtc *crtc;
 758         int ret = 0;
 759         int i;
 760
 761         mutex_lock(&dev->mode_config.mutex);
 762         for (i = 0; i < fb_helper->crtc_count; i++) {
 763                 crtc = fb_helper->crtc_info[i].mode_set.crtc;
 764
 765                 modeset = &fb_helper->crtc_info[i].mode_set;
 766
 767                 modeset->x = var->xoffset;
 768                 modeset->y = var->yoffset;
 769
 770                 if (modeset->num_connectors) {
 771                         ret = crtc->funcs->set_config(modeset);
 772                         if (!ret) {
 773                                 info->var.xoffset = var->xoffset;
 774                                 info->var.yoffset = var->yoffset;
 775                         }
 776                 }
 777         }
 778         mutex_unlock(&dev->mode_config.mutex);
 779         return ret;
 780 }
 781 EXPORT_SYMBOL(drm_fb_helper_pan_display);
 782
 783 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
 784                                   int preferred_bpp)
 785 {
 786         int new_fb = 0;
 787         int crtc_count = 0;
 788         int i;
 789         struct fb_info *info;
 790         struct drm_fb_helper_surface_size sizes;
 791         int gamma_size = 0;
 792
 793         memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
 794         sizes.surface_depth = 24;
 795         sizes.surface_bpp = 32;
 796         sizes.fb_width = (unsigned)-1;
 797         sizes.fb_height = (unsigned)-1;
 798
 799         /* if driver picks 8 or 16 by default use that
 800            for both depth/bpp */
 801         if (preferred_bpp != sizes.surface_bpp) {
 802                 sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
 803         }
 804         /* first up get a count of crtcs now in use and new min/maxes width/heights */
 805         for (i = 0; i < fb_helper->connector_count; i++) {
 806                 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
 807                 struct drm_fb_helper_cmdline_mode *cmdline_mode;
 808
 809                 cmdline_mode = &fb_helper_conn->cmdline_mode;
 810
 811                 if (cmdline_mode->bpp_specified) {
 812                         switch (cmdline_mode->bpp) {
 813                         case 8:
 814                                 sizes.surface_depth = sizes.surface_bpp = 8;
 815                                 break;
 816                         case 15:
 817                                 sizes.surface_depth = 15;
 818                                 sizes.surface_bpp = 16;
 819                                 break;
 820                         case 16:
 821                                 sizes.surface_depth = sizes.surface_bpp = 16;
 822                                 break;
 823                         case 24:
 824                                 sizes.surface_depth = sizes.surface_bpp = 24;
 825                                 break;
 826                         case 32:
 827                                 sizes.surface_depth = 24;
 828                                 sizes.surface_bpp = 32;
 829                                 break;
 830                         }
 831                         break;
 832                 }
 833         }
 834
 835         crtc_count = 0;
 836         for (i = 0; i < fb_helper->crtc_count; i++) {
 837                 struct drm_display_mode *desired_mode;
 838                 desired_mode = fb_helper->crtc_info[i].desired_mode;
 839
 840                 if (desired_mode) {
 841                         if (gamma_size == 0)
 842                                 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
 843                         if (desired_mode->hdisplay < sizes.fb_width)
 844                                 sizes.fb_width = desired_mode->hdisplay;
 845                         if (desired_mode->vdisplay < sizes.fb_height)
 846                                 sizes.fb_height = desired_mode->vdisplay;
 847                         if (desired_mode->hdisplay > sizes.surface_width)
 848                                 sizes.surface_width = desired_mode->hdisplay;
 849                         if (desired_mode->vdisplay > sizes.surface_height)
 850                                 sizes.surface_height = desired_mode->vdisplay;
 851                         crtc_count++;
 852                 }
 853         }
 854
 855         if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
 856                 /* hmm everyone went away - assume VGA cable just fell out
 857                    and will come back later. */
 858                 DRM_ERROR("Cannot find any crtc or sizes - going 1024x768\n");
 859                 sizes.fb_width = sizes.surface_width = 1024;
 860                 sizes.fb_height = sizes.surface_height = 768;
 861         }
 862
 863         /* push down into drivers */
 864         new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
 865         if (new_fb < 0)
 866                 return new_fb;
 867
 868         info = fb_helper->fbdev;
 869
 870         /* set the fb pointer */
 871         for (i = 0; i < fb_helper->crtc_count; i++) {
 872                 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
 873         }
 874
 875         if (new_fb) {
 876                 info->var.pixclock = 0;
 877                 if (register_framebuffer(info) < 0) {
 878                         return -EINVAL;
 879                 }
 880
 881                 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
 882                        info->fix.id);
 883
 884         } else {
 885                 drm_fb_helper_set_par(info);
 886         }
 887
 888         /* Switch back to kernel console on panic */
 889         /* multi card linked list maybe */
 890         if (list_empty(&kernel_fb_helper_list)) {
 891                 printk(KERN_INFO "registered panic notifier\n");
 892                 atomic_notifier_chain_register(&panic_notifier_list,
 893                                                &paniced);
 894                 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
 895         }
 896         if (new_fb)
 897                 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
 898
 899         return 0;
 900 }
 901 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
 902
 903 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
 904                             uint32_t depth)
 905 {
 906         info->fix.type = FB_TYPE_PACKED_PIXELS;
 907         info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
 908                 FB_VISUAL_TRUECOLOR;
 909         info->fix.type_aux = 0;
 910         info->fix.xpanstep = 1; /* doing it in hw */
 911         info->fix.ypanstep = 1; /* doing it in hw */
 912         info->fix.ywrapstep = 0;
 913         info->fix.accel = FB_ACCEL_NONE;
 914         info->fix.type_aux = 0;
 915
 916         info->fix.line_length = pitch;
 917         return;
 918 }
 919 EXPORT_SYMBOL(drm_fb_helper_fill_fix);
 920
 921 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
 922                             uint32_t fb_width, uint32_t fb_height)
 923 {
 924         struct drm_framebuffer *fb = fb_helper->fb;
 925         info->pseudo_palette = fb_helper->pseudo_palette;
 926         info->var.xres_virtual = fb->width;
 927         info->var.yres_virtual = fb->height;
 928         info->var.bits_per_pixel = fb->bits_per_pixel;
 929         info->var.xoffset = 0;
 930         info->var.yoffset = 0;
 931         info->var.activate = FB_ACTIVATE_NOW;
 932         info->var.height = -1;
 933         info->var.width = -1;
 934
 935         switch (fb->depth) {
 936         case 8:
 937                 info->var.red.offset = 0;
 938                 info->var.green.offset = 0;
 939                 info->var.blue.offset = 0;
 940                 info->var.red.length = 8; /* 8bit DAC */
 941                 info->var.green.length = 8;
 942                 info->var.blue.length = 8;
 943                 info->var.transp.offset = 0;
 944                 info->var.transp.length = 0;
 945                 break;
 946         case 15:
 947                 info->var.red.offset = 10;
 948                 info->var.green.offset = 5;
 949                 info->var.blue.offset = 0;
 950                 info->var.red.length = 5;
 951                 info->var.green.length = 5;
 952                 info->var.blue.length = 5;
 953                 info->var.transp.offset = 15;
 954                 info->var.transp.length = 1;
 955                 break;
 956         case 16:
 957                 info->var.red.offset = 11;
 958                 info->var.green.offset = 5;
 959                 info->var.blue.offset = 0;
 960                 info->var.red.length = 5;
 961                 info->var.green.length = 6;
 962                 info->var.blue.length = 5;
 963                 info->var.transp.offset = 0;
 964                 break;
 965         case 24:
 966                 info->var.red.offset = 16;
 967                 info->var.green.offset = 8;
 968                 info->var.blue.offset = 0;
 969                 info->var.red.length = 8;
 970                 info->var.green.length = 8;
 971                 info->var.blue.length = 8;
 972                 info->var.transp.offset = 0;
 973                 info->var.transp.length = 0;
 974                 break;
 975         case 32:
 976                 info->var.red.offset = 16;
 977                 info->var.green.offset = 8;
 978                 info->var.blue.offset = 0;
 979                 info->var.red.length = 8;
 980                 info->var.green.length = 8;
 981                 info->var.blue.length = 8;
 982                 info->var.transp.offset = 24;
 983                 info->var.transp.length = 8;
 984                 break;
 985         default:
 986                 break;
 987         }
 988
 989         info->var.xres = fb_width;
 990         info->var.yres = fb_height;
 991 }
 992 EXPORT_SYMBOL(drm_fb_helper_fill_var);
 993
 994 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
 995                                                uint32_t maxX,
 996                                                uint32_t maxY)
 997 {
 998         struct drm_connector *connector;
 999         int count = 0;
1000         int i;
1001
1002         for (i = 0; i < fb_helper->connector_count; i++) {
1003                 connector = fb_helper->connector_info[i]->connector;
1004                 count += connector->funcs->fill_modes(connector, maxX, maxY);
1005         }
1006
1007         return count;
1008 }
1009
1010 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1011 {
1012         struct drm_display_mode *mode;
1013
1014         list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1015                 if (drm_mode_width(mode) > width ||
1016                     drm_mode_height(mode) > height)
1017                         continue;
1018                 if (mode->type & DRM_MODE_TYPE_PREFERRED)
1019                         return mode;
1020         }
1021         return NULL;
1022 }
1023
1024 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1025 {
1026         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1027         cmdline_mode = &fb_connector->cmdline_mode;
1028         return cmdline_mode->specified;
1029 }
1030
1031 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
1032                                                       int width, int height)
1033 {
1034         struct drm_fb_helper_cmdline_mode *cmdline_mode;
1035         struct drm_display_mode *mode = NULL;
1036
1037         cmdline_mode = &fb_helper_conn->cmdline_mode;
1038         if (cmdline_mode->specified == false)
1039                 return mode;
1040
1041         /* attempt to find a matching mode in the list of modes
1042          *  we have gotten so far, if not add a CVT mode that conforms
1043          */
1044         if (cmdline_mode->rb || cmdline_mode->margins)
1045                 goto create_mode;
1046
1047         list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1048                 /* check width/height */
1049                 if (mode->hdisplay != cmdline_mode->xres ||
1050                     mode->vdisplay != cmdline_mode->yres)
1051                         continue;
1052
1053                 if (cmdline_mode->refresh_specified) {
1054                         if (mode->vrefresh != cmdline_mode->refresh)
1055                                 continue;
1056                 }
1057
1058                 if (cmdline_mode->interlace) {
1059                         if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
1060                                 continue;
1061                 }
1062                 return mode;
1063         }
1064
1065 create_mode:
1066         mode = drm_cvt_mode(fb_helper_conn->connector->dev, cmdline_mode->xres,
1067                             cmdline_mode->yres,
1068                             cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
1069                             cmdline_mode->rb, cmdline_mode->interlace,
1070                             cmdline_mode->margins);
1071         drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1072         list_add(&mode->head, &fb_helper_conn->connector->modes);
1073         return mode;
1074 }
1075
1076 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
1077 {
1078         bool enable;
1079
1080         if (strict) {
1081                 enable = connector->status == connector_status_connected;
1082         } else {
1083                 enable = connector->status != connector_status_disconnected;
1084         }
1085         return enable;
1086 }
1087
1088 static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
1089                                   bool *enabled)
1090 {
1091         bool any_enabled = false;
1092         struct drm_connector *connector;
1093         int i = 0;
1094
1095         for (i = 0; i < fb_helper->connector_count; i++) {
1096                 connector = fb_helper->connector_info[i]->connector;
1097                 enabled[i] = drm_connector_enabled(connector, true);
1098                 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
1099                           enabled[i] ? "yes" : "no");
1100                 any_enabled |= enabled[i];
1101         }
1102
1103         if (any_enabled)
1104                 return;
1105
1106         for (i = 0; i < fb_helper->connector_count; i++) {
1107                 connector = fb_helper->connector_info[i]->connector;
1108                 enabled[i] = drm_connector_enabled(connector, false);
1109         }
1110 }
1111
1112 static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1113                                  struct drm_display_mode **modes,
1114                                  bool *enabled, int width, int height)
1115 {
1116         struct drm_fb_helper_connector *fb_helper_conn;
1117         int i;
1118
1119         for (i = 0; i < fb_helper->connector_count; i++) {
1120                 fb_helper_conn = fb_helper->connector_info[i];
1121
1122                 if (enabled[i] == false)
1123                         continue;
1124
1125                 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1126                               fb_helper_conn->connector->base.id);
1127
1128                 /* got for command line mode first */
1129                 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1130                 if (!modes[i]) {
1131                         DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1132                                       fb_helper_conn->connector->base.id);
1133                         modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1134                 }
1135                 /* No preferred modes, pick one off the list */
1136                 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
1137                         list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1138                                 break;
1139                 }
1140                 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
1141                           "none");
1142         }
1143         return true;
1144 }
1145
1146 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
1147                           struct drm_fb_helper_crtc **best_crtcs,
1148                           struct drm_display_mode **modes,
1149                           int n, int width, int height)
1150 {
1151         int c, o;
1152         struct drm_device *dev = fb_helper->dev;
1153         struct drm_connector *connector;
1154         struct drm_connector_helper_funcs *connector_funcs;
1155         struct drm_encoder *encoder;
1156         struct drm_fb_helper_crtc *best_crtc;
1157         int my_score, best_score, score;
1158         struct drm_fb_helper_crtc **crtcs, *crtc;
1159         struct drm_fb_helper_connector *fb_helper_conn;
1160
1161         if (n == fb_helper->connector_count)
1162                 return 0;
1163
1164         fb_helper_conn = fb_helper->connector_info[n];
1165         connector = fb_helper_conn->connector;
1166
1167         best_crtcs[n] = NULL;
1168         best_crtc = NULL;
1169         best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1170         if (modes[n] == NULL)
1171                 return best_score;
1172
1173         crtcs = kzalloc(dev->mode_config.num_connector *
1174                         sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1175         if (!crtcs)
1176                 return best_score;
1177
1178         my_score = 1;
1179         if (connector->status == connector_status_connected)
1180                 my_score++;
1181         if (drm_has_cmdline_mode(fb_helper_conn))
1182                 my_score++;
1183         if (drm_has_preferred_mode(fb_helper_conn, width, height))
1184                 my_score++;
1185
1186         connector_funcs = connector->helper_private;
1187         encoder = connector_funcs->best_encoder(connector);
1188         if (!encoder)
1189                 goto out;
1190
1191         /* select a crtc for this connector and then attempt to configure
1192            remaining connectors */
1193         for (c = 0; c < fb_helper->crtc_count; c++) {
1194                 crtc = &fb_helper->crtc_info[c];
1195
1196                 if ((encoder->possible_crtcs & (1 << c)) == 0) {
1197                         continue;
1198                 }
1199
1200                 for (o = 0; o < n; o++)
1201                         if (best_crtcs[o] == crtc)
1202                                 break;
1203
1204                 if (o < n) {
1205                         /* ignore cloning for now */
1206                         continue;
1207                 }
1208
1209                 crtcs[n] = crtc;
1210                 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
1211                 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1212                                                   width, height);
1213                 if (score > best_score) {
1214                         best_crtc = crtc;
1215                         best_score = score;
1216                         memcpy(best_crtcs, crtcs,
1217                                dev->mode_config.num_connector *
1218                                sizeof(struct drm_fb_helper_crtc *));
1219                 }
1220         }
1221 out:
1222         kfree(crtcs);
1223         return best_score;
1224 }
1225
1226 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1227 {
1228         struct drm_device *dev = fb_helper->dev;
1229         struct drm_fb_helper_crtc **crtcs;
1230         struct drm_display_mode **modes;
1231         struct drm_encoder *encoder;
1232         struct drm_mode_set *modeset;
1233         bool *enabled;
1234         int width, height;
1235         int i, ret;
1236
1237         DRM_DEBUG_KMS("\n");
1238
1239         width = dev->mode_config.max_width;
1240         height = dev->mode_config.max_height;
1241
1242         /* clean out all the encoder/crtc combos */
1243         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1244                 encoder->crtc = NULL;
1245         }
1246
1247         crtcs = kcalloc(dev->mode_config.num_connector,
1248                         sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1249         modes = kcalloc(dev->mode_config.num_connector,
1250                         sizeof(struct drm_display_mode *), GFP_KERNEL);
1251         enabled = kcalloc(dev->mode_config.num_connector,
1252                           sizeof(bool), GFP_KERNEL);
1253
1254         drm_enable_connectors(fb_helper, enabled);
1255
1256         ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
1257         if (!ret)
1258                 DRM_ERROR("Unable to find initial modes\n");
1259
1260         DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
1261
1262         drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
1263
1264         /* need to set the modesets up here for use later */
1265         /* fill out the connector<->crtc mappings into the modesets */
1266         for (i = 0; i < fb_helper->crtc_count; i++) {
1267                 modeset = &fb_helper->crtc_info[i].mode_set;
1268                 modeset->num_connectors = 0;
1269         }
1270
1271         for (i = 0; i < fb_helper->connector_count; i++) {
1272                 struct drm_display_mode *mode = modes[i];
1273                 struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
1274                 modeset = &fb_crtc->mode_set;
1275
1276                 if (mode && fb_crtc) {
1277                         DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1278                                       mode->name, fb_crtc->mode_set.crtc->base.id);
1279                         fb_crtc->desired_mode = mode;
1280                         if (modeset->mode)
1281                                 drm_mode_destroy(dev, modeset->mode);
1282                         modeset->mode = drm_mode_duplicate(dev,
1283                                                            fb_crtc->desired_mode);
1284                         modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1285                 }
1286         }
1287
1288         kfree(crtcs);
1289         kfree(modes);
1290         kfree(enabled);
1291 }
1292
1293 /**
1294  * drm_helper_initial_config - setup a sane initial connector configuration
1295  * @dev: DRM device
1296  *
1297  * LOCKING:
1298  * Called at init time, must take mode config lock.
1299  *
1300  * Scan the CRTCs and connectors and try to put together an initial setup.
1301  * At the moment, this is a cloned configuration across all heads with
1302  * a new framebuffer object as the backing store.
1303  *
1304  * RETURNS:
1305  * Zero if everything went ok, nonzero otherwise.
1306  */
1307 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1308 {
1309         struct drm_device *dev = fb_helper->dev;
1310         int count = 0;
1311
1312         /* disable all the possible outputs/crtcs before entering KMS mode */
1313         drm_helper_disable_unused_functions(fb_helper->dev);
1314
1315         drm_fb_helper_parse_command_line(fb_helper);
1316
1317         count = drm_fb_helper_probe_connector_modes(fb_helper,
1318                                                     dev->mode_config.max_width,
1319                                                     dev->mode_config.max_height);
1320         /*
1321          * we shouldn't end up with no modes here.
1322          */
1323         if (count == 0) {
1324                 if (fb_helper->poll_enabled) {
1325                         delayed_slow_work_enqueue(&fb_helper->output_status_change_slow_work,
1326                                                   5*HZ);
1327                         printk(KERN_INFO "No connectors reported connected with modes - started polling\n");
1328                 } else
1329                         printk(KERN_INFO "No connectors reported connected with modes\n");
1330         }
1331         drm_setup_crtcs(fb_helper);
1332
1333         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1334 }
1335 EXPORT_SYMBOL(drm_fb_helper_initial_config);
1336
1337 /* we got a hotplug irq - need to update fbcon */
1338 void drm_helper_fb_hpd_irq_event(struct drm_fb_helper *fb_helper)
1339 {
1340         /* if we don't have the fbdev registered yet do nothing */
1341         if (!fb_helper->fbdev)
1342                 return;
1343
1344         /* schedule a slow work asap */
1345         delayed_slow_work_enqueue(&fb_helper->output_status_change_slow_work, 0);
1346 }
1347 EXPORT_SYMBOL(drm_helper_fb_hpd_irq_event);
1348
1349 bool drm_helper_fb_hotplug_event(struct drm_fb_helper *fb_helper, bool polled)
1350 {
1351         int count = 0;
1352         int ret;
1353         u32 max_width, max_height, bpp_sel;
1354
1355         if (!fb_helper->fb)
1356                 return false;
1357         DRM_DEBUG_KMS("\n");
1358
1359         max_width = fb_helper->fb->width;
1360         max_height = fb_helper->fb->height;
1361         bpp_sel = fb_helper->fb->bits_per_pixel;
1362
1363         count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
1364                                                     max_height);
1365         if (fb_helper->poll_enabled && !polled) {
1366                 if (count) {
1367                         delayed_slow_work_cancel(&fb_helper->output_status_change_slow_work);
1368                 } else {
1369                         ret = delayed_slow_work_enqueue(&fb_helper->output_status_change_slow_work, 5*HZ);
1370                 }
1371         }
1372         drm_setup_crtcs(fb_helper);
1373
1374         return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1375 }
1376 EXPORT_SYMBOL(drm_helper_fb_hotplug_event);
1377
1378 /*
1379  * delayed work queue execution function
1380  * - check if fbdev is actually in use on the gpu
1381  *   - if not set delayed flag and repoll if necessary
1382  * - check for connector status change
1383  * - repoll if 0 modes found
1384  *- call driver output status changed notifier
1385  */
1386 static void output_status_change_execute(struct slow_work *work)
1387 {
1388         struct delayed_slow_work *delayed_work = container_of(work, struct delayed_slow_work, work);
1389         struct drm_fb_helper *fb_helper = container_of(delayed_work, struct drm_fb_helper, output_status_change_slow_work);
1390         struct drm_connector *connector;
1391         enum drm_connector_status old_status, status;
1392         bool repoll, changed = false;
1393         int ret;
1394         int i;
1395         bool bound = false, crtcs_bound = false;
1396         struct drm_crtc *crtc;
1397
1398         repoll = fb_helper->poll_enabled;
1399
1400         /* first of all check the fbcon framebuffer is actually bound to any crtc */
1401         /* take into account that no crtc at all maybe bound */
1402         list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
1403                 if (crtc->fb)
1404                         crtcs_bound = true;
1405                 if (crtc->fb == fb_helper->fb)
1406                         bound = true;
1407         }
1408
1409         if (bound == false && crtcs_bound) {
1410                 fb_helper->delayed_hotplug = true;
1411                 goto requeue;
1412         }
1413
1414         for (i = 0; i < fb_helper->connector_count; i++) {
1415                 connector = fb_helper->connector_info[i]->connector;
1416                 old_status = connector->status;
1417                 status = connector->funcs->detect(connector);
1418                 if (old_status != status) {
1419                         changed = true;
1420                 }
1421                 if (status == connector_status_connected && repoll) {
1422                         DRM_DEBUG("%s is connected - stop polling\n", drm_get_connector_name(connector));
1423                         repoll = false;
1424                 }
1425         }
1426
1427         if (changed) {
1428                 if (fb_helper->funcs->fb_output_status_changed)
1429                         fb_helper->funcs->fb_output_status_changed(fb_helper);
1430         }
1431
1432 requeue:
1433         if (repoll) {
1434                 ret = delayed_slow_work_enqueue(delayed_work, 5*HZ);
1435                 if (ret)
1436                         DRM_ERROR("delayed enqueue failed %d\n", ret);
1437         }
1438 }
1439
1440 static struct slow_work_ops output_status_change_ops = {
1441         .execute = output_status_change_execute,
1442 };
1443