drivers/video/omap2/dss/overlay.c

   1 /*
   2  * linux/drivers/video/omap2/dss/overlay.c
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Some code and ideas taken from drivers/video/omap/ driver
   8  * by Imre Deak.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #define DSS_SUBSYS_NAME "OVERLAY"
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/err.h>
  28 #include <linux/sysfs.h>
  29 #include <linux/kobject.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/delay.h>
  32 #include <linux/slab.h>
  33
  34 #include <plat/display.h>
  35 #include <plat/cpu.h>
  36
  37 #include "dss.h"
  38 #include "dss_features.h"
  39
  40 static int num_overlays;
  41 static struct list_head overlay_list;
  42
  43 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
  44 {
  45         return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
  46 }
  47
  48 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
  49 {
  50         return snprintf(buf, PAGE_SIZE, "%s\n",
  51                         ovl->manager ? ovl->manager->name : "<none>");
  52 }
  53
  54 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
  55                 size_t size)
  56 {
  57         int i, r;
  58         struct omap_overlay_manager *mgr = NULL;
  59         struct omap_overlay_manager *old_mgr;
  60         int len = size;
  61
  62         if (buf[size-1] == '\n')
  63                 --len;
  64
  65         if (len > 0) {
  66                 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
  67                         mgr = omap_dss_get_overlay_manager(i);
  68
  69                         if (sysfs_streq(buf, mgr->name))
  70                                 break;
  71
  72                         mgr = NULL;
  73                 }
  74         }
  75
  76         if (len > 0 && mgr == NULL)
  77                 return -EINVAL;
  78
  79         if (mgr)
  80                 DSSDBG("manager %s found\n", mgr->name);
  81
  82         if (mgr == ovl->manager)
  83                 return size;
  84
  85         old_mgr = ovl->manager;
  86
  87         /* detach old manager */
  88         if (old_mgr) {
  89                 r = ovl->unset_manager(ovl);
  90                 if (r) {
  91                         DSSERR("detach failed\n");
  92                         return r;
  93                 }
  94
  95                 r = old_mgr->apply(old_mgr);
  96                 if (r)
  97                         return r;
  98         }
  99
 100         if (mgr) {
 101                 r = ovl->set_manager(ovl, mgr);
 102                 if (r) {
 103                         DSSERR("Failed to attach overlay\n");
 104                         return r;
 105                 }
 106
 107                 r = mgr->apply(mgr);
 108                 if (r)
 109                         return r;
 110         }
 111
 112         return size;
 113 }
 114
 115 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
 116 {
 117         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 118                         ovl->info.width, ovl->info.height);
 119 }
 120
 121 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
 122 {
 123         return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
 124 }
 125
 126 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
 127 {
 128         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 129                         ovl->info.pos_x, ovl->info.pos_y);
 130 }
 131
 132 static ssize_t overlay_position_store(struct omap_overlay *ovl,
 133                 const char *buf, size_t size)
 134 {
 135         int r;
 136         char *last;
 137         struct omap_overlay_info info;
 138
 139         ovl->get_overlay_info(ovl, &info);
 140
 141         info.pos_x = simple_strtoul(buf, &last, 10);
 142         ++last;
 143         if (last - buf >= size)
 144                 return -EINVAL;
 145
 146         info.pos_y = simple_strtoul(last, &last, 10);
 147
 148         r = ovl->set_overlay_info(ovl, &info);
 149         if (r)
 150                 return r;
 151
 152         if (ovl->manager) {
 153                 r = ovl->manager->apply(ovl->manager);
 154                 if (r)
 155                         return r;
 156         }
 157
 158         return size;
 159 }
 160
 161 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
 162 {
 163         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 164                         ovl->info.out_width, ovl->info.out_height);
 165 }
 166
 167 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
 168                 const char *buf, size_t size)
 169 {
 170         int r;
 171         char *last;
 172         struct omap_overlay_info info;
 173
 174         ovl->get_overlay_info(ovl, &info);
 175
 176         info.out_width = simple_strtoul(buf, &last, 10);
 177         ++last;
 178         if (last - buf >= size)
 179                 return -EINVAL;
 180
 181         info.out_height = simple_strtoul(last, &last, 10);
 182
 183         r = ovl->set_overlay_info(ovl, &info);
 184         if (r)
 185                 return r;
 186
 187         if (ovl->manager) {
 188                 r = ovl->manager->apply(ovl->manager);
 189                 if (r)
 190                         return r;
 191         }
 192
 193         return size;
 194 }
 195
 196 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
 197 {
 198         return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
 199 }
 200
 201 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
 202                 size_t size)
 203 {
 204         int r;
 205         struct omap_overlay_info info;
 206
 207         ovl->get_overlay_info(ovl, &info);
 208
 209         info.enabled = simple_strtoul(buf, NULL, 10);
 210
 211         r = ovl->set_overlay_info(ovl, &info);
 212         if (r)
 213                 return r;
 214
 215         if (ovl->manager) {
 216                 r = ovl->manager->apply(ovl->manager);
 217                 if (r)
 218                         return r;
 219         }
 220
 221         return size;
 222 }
 223
 224 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
 225 {
 226         return snprintf(buf, PAGE_SIZE, "%d\n",
 227                         ovl->info.global_alpha);
 228 }
 229
 230 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
 231                 const char *buf, size_t size)
 232 {
 233         int r;
 234         struct omap_overlay_info info;
 235
 236         ovl->get_overlay_info(ovl, &info);
 237
 238         /* Video1 plane does not support global alpha
 239          * to always make it 255 completely opaque
 240          */
 241         if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
 242                         ovl->id == OMAP_DSS_VIDEO1)
 243                 info.global_alpha = 255;
 244         else
 245                 info.global_alpha = simple_strtoul(buf, NULL, 10);
 246
 247         r = ovl->set_overlay_info(ovl, &info);
 248         if (r)
 249                 return r;
 250
 251         if (ovl->manager) {
 252                 r = ovl->manager->apply(ovl->manager);
 253                 if (r)
 254                         return r;
 255         }
 256
 257         return size;
 258 }
 259
 260 static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
 261                 char *buf)
 262 {
 263         return snprintf(buf, PAGE_SIZE, "%d\n",
 264                         ovl->info.pre_mult_alpha);
 265 }
 266
 267 static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
 268                 const char *buf, size_t size)
 269 {
 270         int r;
 271         struct omap_overlay_info info;
 272
 273         ovl->get_overlay_info(ovl, &info);
 274
 275         /* only GFX and Video2 plane support pre alpha multiplied
 276          * set zero for Video1 plane
 277          */
 278         if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
 279                 ovl->id == OMAP_DSS_VIDEO1)
 280                 info.pre_mult_alpha = 0;
 281         else
 282                 info.pre_mult_alpha = simple_strtoul(buf, NULL, 10);
 283
 284         r = ovl->set_overlay_info(ovl, &info);
 285         if (r)
 286                 return r;
 287
 288         if (ovl->manager) {
 289                 r = ovl->manager->apply(ovl->manager);
 290                 if (r)
 291                         return r;
 292         }
 293
 294         return size;
 295 }
 296
 297 struct overlay_attribute {
 298         struct attribute attr;
 299         ssize_t (*show)(struct omap_overlay *, char *);
 300         ssize_t (*store)(struct omap_overlay *, const char *, size_t);
 301 };
 302
 303 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
 304         struct overlay_attribute overlay_attr_##_name = \
 305         __ATTR(_name, _mode, _show, _store)
 306
 307 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
 308 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
 309                 overlay_manager_show, overlay_manager_store);
 310 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
 311 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
 312 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
 313                 overlay_position_show, overlay_position_store);
 314 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
 315                 overlay_output_size_show, overlay_output_size_store);
 316 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
 317                 overlay_enabled_show, overlay_enabled_store);
 318 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
 319                 overlay_global_alpha_show, overlay_global_alpha_store);
 320 static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO|S_IWUSR,
 321                 overlay_pre_mult_alpha_show,
 322                 overlay_pre_mult_alpha_store);
 323
 324 static struct attribute *overlay_sysfs_attrs[] = {
 325         &overlay_attr_name.attr,
 326         &overlay_attr_manager.attr,
 327         &overlay_attr_input_size.attr,
 328         &overlay_attr_screen_width.attr,
 329         &overlay_attr_position.attr,
 330         &overlay_attr_output_size.attr,
 331         &overlay_attr_enabled.attr,
 332         &overlay_attr_global_alpha.attr,
 333         &overlay_attr_pre_mult_alpha.attr,
 334         NULL
 335 };
 336
 337 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
 338                 char *buf)
 339 {
 340         struct omap_overlay *overlay;
 341         struct overlay_attribute *overlay_attr;
 342
 343         overlay = container_of(kobj, struct omap_overlay, kobj);
 344         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 345
 346         if (!overlay_attr->show)
 347                 return -ENOENT;
 348
 349         return overlay_attr->show(overlay, buf);
 350 }
 351
 352 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
 353                 const char *buf, size_t size)
 354 {
 355         struct omap_overlay *overlay;
 356         struct overlay_attribute *overlay_attr;
 357
 358         overlay = container_of(kobj, struct omap_overlay, kobj);
 359         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 360
 361         if (!overlay_attr->store)
 362                 return -ENOENT;
 363
 364         return overlay_attr->store(overlay, buf, size);
 365 }
 366
 367 static const struct sysfs_ops overlay_sysfs_ops = {
 368         .show = overlay_attr_show,
 369         .store = overlay_attr_store,
 370 };
 371
 372 static struct kobj_type overlay_ktype = {
 373         .sysfs_ops = &overlay_sysfs_ops,
 374         .default_attrs = overlay_sysfs_attrs,
 375 };
 376
 377 /* Check if overlay parameters are compatible with display */
 378 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
 379 {
 380         struct omap_overlay_info *info;
 381         u16 outw, outh;
 382         u16 dw, dh;
 383
 384         if (!dssdev)
 385                 return 0;
 386
 387         if (!ovl->info.enabled)
 388                 return 0;
 389
 390         info = &ovl->info;
 391
 392         if (info->paddr == 0) {
 393                 DSSDBG("check_overlay failed: paddr 0\n");
 394                 return -EINVAL;
 395         }
 396
 397         dssdev->driver->get_resolution(dssdev, &dw, &dh);
 398
 399         DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
 400                         ovl->id,
 401                         info->pos_x, info->pos_y,
 402                         info->width, info->height,
 403                         info->out_width, info->out_height,
 404                         dw, dh);
 405
 406         if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 407                 outw = info->width;
 408                 outh = info->height;
 409         } else {
 410                 if (info->out_width == 0)
 411                         outw = info->width;
 412                 else
 413                         outw = info->out_width;
 414
 415                 if (info->out_height == 0)
 416                         outh = info->height;
 417                 else
 418                         outh = info->out_height;
 419         }
 420
 421         if (dw < info->pos_x + outw) {
 422                 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
 423                                 dw, info->pos_x, outw);
 424                 return -EINVAL;
 425         }
 426
 427         if (dh < info->pos_y + outh) {
 428                 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
 429                                 dh, info->pos_y, outh);
 430                 return -EINVAL;
 431         }
 432
 433         if ((ovl->supported_modes & info->color_mode) == 0) {
 434                 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
 435                 return -EINVAL;
 436         }
 437
 438         return 0;
 439 }
 440
 441 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
 442                 struct omap_overlay_info *info)
 443 {
 444         int r;
 445         struct omap_overlay_info old_info;
 446
 447         old_info = ovl->info;
 448         ovl->info = *info;
 449
 450         if (ovl->manager) {
 451                 r = dss_check_overlay(ovl, ovl->manager->device);
 452                 if (r) {
 453                         ovl->info = old_info;
 454                         return r;
 455                 }
 456         }
 457
 458         ovl->info_dirty = true;
 459
 460         return 0;
 461 }
 462
 463 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
 464                 struct omap_overlay_info *info)
 465 {
 466         *info = ovl->info;
 467 }
 468
 469 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
 470 {
 471         return dss_mgr_wait_for_go_ovl(ovl);
 472 }
 473
 474 static int omap_dss_set_manager(struct omap_overlay *ovl,
 475                 struct omap_overlay_manager *mgr)
 476 {
 477         if (!mgr)
 478                 return -EINVAL;
 479
 480         if (ovl->manager) {
 481                 DSSERR("overlay '%s' already has a manager '%s'\n",
 482                                 ovl->name, ovl->manager->name);
 483                 return -EINVAL;
 484         }
 485
 486         if (ovl->info.enabled) {
 487                 DSSERR("overlay has to be disabled to change the manager\n");
 488                 return -EINVAL;
 489         }
 490
 491         ovl->manager = mgr;
 492
 493         dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
 494         /* XXX: on manual update display, in auto update mode, a bug happens
 495          * here. When an overlay is first enabled on LCD, then it's disabled,
 496          * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
 497          * errors. Waiting before changing the channel_out fixes it. I'm
 498          * guessing that the overlay is still somehow being used for the LCD,
 499          * but I don't understand how or why. */
 500         msleep(40);
 501         dispc_set_channel_out(ovl->id, mgr->id);
 502         dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
 503
 504         return 0;
 505 }
 506
 507 static int omap_dss_unset_manager(struct omap_overlay *ovl)
 508 {
 509         int r;
 510
 511         if (!ovl->manager) {
 512                 DSSERR("failed to detach overlay: manager not set\n");
 513                 return -EINVAL;
 514         }
 515
 516         if (ovl->info.enabled) {
 517                 DSSERR("overlay has to be disabled to unset the manager\n");
 518                 return -EINVAL;
 519         }
 520
 521         r = ovl->wait_for_go(ovl);
 522         if (r)
 523                 return r;
 524
 525         ovl->manager = NULL;
 526
 527         return 0;
 528 }
 529
 530 int omap_dss_get_num_overlays(void)
 531 {
 532         return num_overlays;
 533 }
 534 EXPORT_SYMBOL(omap_dss_get_num_overlays);
 535
 536 struct omap_overlay *omap_dss_get_overlay(int num)
 537 {
 538         int i = 0;
 539         struct omap_overlay *ovl;
 540
 541         list_for_each_entry(ovl, &overlay_list, list) {
 542                 if (i++ == num)
 543                         return ovl;
 544         }
 545
 546         return NULL;
 547 }
 548 EXPORT_SYMBOL(omap_dss_get_overlay);
 549
 550 static void omap_dss_add_overlay(struct omap_overlay *overlay)
 551 {
 552         ++num_overlays;
 553         list_add_tail(&overlay->list, &overlay_list);
 554 }
 555
 556 static struct omap_overlay *dispc_overlays[MAX_DSS_OVERLAYS];
 557
 558 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
 559 {
 560         mgr->num_overlays = dss_feat_get_num_ovls();
 561         mgr->overlays = dispc_overlays;
 562 }
 563
 564 #ifdef L4_EXAMPLE
 565 static struct omap_overlay *l4_overlays[1];
 566 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
 567 {
 568         mgr->num_overlays = 1;
 569         mgr->overlays = l4_overlays;
 570 }
 571 #endif
 572
 573 void dss_init_overlays(struct platform_device *pdev)
 574 {
 575         int i, r;
 576
 577         INIT_LIST_HEAD(&overlay_list);
 578
 579         num_overlays = 0;
 580
 581         for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
 582                 struct omap_overlay *ovl;
 583                 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
 584
 585                 BUG_ON(ovl == NULL);
 586
 587                 switch (i) {
 588                 case 0:
 589                         ovl->name = "gfx";
 590                         ovl->id = OMAP_DSS_GFX;
 591                         ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
 592                         ovl->info.global_alpha = 255;
 593                         break;
 594                 case 1:
 595                         ovl->name = "vid1";
 596                         ovl->id = OMAP_DSS_VIDEO1;
 597                         ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
 598                                 OMAP_DSS_OVL_CAP_DISPC;
 599                         ovl->info.global_alpha = 255;
 600                         break;
 601                 case 2:
 602                         ovl->name = "vid2";
 603                         ovl->id = OMAP_DSS_VIDEO2;
 604                         ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
 605                                 OMAP_DSS_OVL_CAP_DISPC;
 606                         ovl->info.global_alpha = 255;
 607                         break;
 608                 }
 609
 610                 ovl->set_manager = &omap_dss_set_manager;
 611                 ovl->unset_manager = &omap_dss_unset_manager;
 612                 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
 613                 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
 614                 ovl->wait_for_go = &dss_ovl_wait_for_go;
 615
 616                 ovl->supported_modes =
 617                         dss_feat_get_supported_color_modes(ovl->id);
 618
 619                 omap_dss_add_overlay(ovl);
 620
 621                 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
 622                                 &pdev->dev.kobj, "overlay%d", i);
 623
 624                 if (r) {
 625                         DSSERR("failed to create sysfs file\n");
 626                         continue;
 627                 }
 628
 629                 dispc_overlays[i] = ovl;
 630         }
 631
 632 #ifdef L4_EXAMPLE
 633         {
 634                 struct omap_overlay *ovl;
 635                 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
 636
 637                 BUG_ON(ovl == NULL);
 638
 639                 ovl->name = "l4";
 640                 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
 641
 642                 ovl->set_manager = &omap_dss_set_manager;
 643                 ovl->unset_manager = &omap_dss_unset_manager;
 644                 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
 645                 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
 646
 647                 omap_dss_add_overlay(ovl);
 648
 649                 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
 650                                 &pdev->dev.kobj, "overlayl4");
 651
 652                 if (r)
 653                         DSSERR("failed to create sysfs file\n");
 654
 655                 l4_overlays[0] = ovl;
 656         }
 657 #endif
 658 }
 659
 660 /* connect overlays to the new device, if not already connected. if force
 661  * selected, connect always. */
 662 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
 663 {
 664         int i;
 665         struct omap_overlay_manager *lcd_mgr;
 666         struct omap_overlay_manager *tv_mgr;
 667         struct omap_overlay_manager *mgr = NULL;
 668
 669         lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
 670         tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
 671
 672         if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
 673                 if (!lcd_mgr->device || force) {
 674                         if (lcd_mgr->device)
 675                                 lcd_mgr->unset_device(lcd_mgr);
 676                         lcd_mgr->set_device(lcd_mgr, dssdev);
 677                         mgr = lcd_mgr;
 678                 }
 679         }
 680
 681         if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
 682                 if (!tv_mgr->device || force) {
 683                         if (tv_mgr->device)
 684                                 tv_mgr->unset_device(tv_mgr);
 685                         tv_mgr->set_device(tv_mgr, dssdev);
 686                         mgr = tv_mgr;
 687                 }
 688         }
 689
 690         if (mgr) {
 691                 for (i = 0; i < dss_feat_get_num_ovls(); i++) {
 692                         struct omap_overlay *ovl;
 693                         ovl = omap_dss_get_overlay(i);
 694                         if (!ovl->manager || force) {
 695                                 if (ovl->manager)
 696                                         omap_dss_unset_manager(ovl);
 697                                 omap_dss_set_manager(ovl, mgr);
 698                         }
 699                 }
 700         }
 701 }
 702
 703 void dss_uninit_overlays(struct platform_device *pdev)
 704 {
 705         struct omap_overlay *ovl;
 706
 707         while (!list_empty(&overlay_list)) {
 708                 ovl = list_first_entry(&overlay_list,
 709                                 struct omap_overlay, list);
 710                 list_del(&ovl->list);
 711                 kobject_del(&ovl->kobj);
 712                 kobject_put(&ovl->kobj);
 713                 kfree(ovl);
 714         }
 715
 716         num_overlays = 0;
 717 }
 718