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