drivers/video/omap2/omapfb/omapfb-ioctl.c

   1 /*
   2  * linux/drivers/video/omap2/omapfb-ioctl.c
   3  *
   4  * Copyright (C) 2008 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 #include <linux/fb.h>
  24 #include <linux/device.h>
  25 #include <linux/uaccess.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/mm.h>
  28 #include <linux/omapfb.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <plat/display.h>
  32 #include <plat/vrfb.h>
  33 #include <plat/vram.h>
  34
  35 #include "omapfb.h"
  36
  37 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
  38 {
  39         struct omapfb_info *ofbi = FB2OFB(fbi);
  40         struct omapfb2_device *fbdev = ofbi->fbdev;
  41         struct omap_overlay *ovl;
  42         struct omap_overlay_info info;
  43         int r = 0;
  44
  45         DBG("omapfb_setup_plane\n");
  46
  47         if (ofbi->num_overlays != 1) {
  48                 r = -EINVAL;
  49                 goto out;
  50         }
  51
  52         /* XXX uses only the first overlay */
  53         ovl = ofbi->overlays[0];
  54
  55         if (pi->enabled && !ofbi->region.size) {
  56                 /*
  57                  * This plane's memory was freed, can't enable it
  58                  * until it's reallocated.
  59                  */
  60                 r = -EINVAL;
  61                 goto out;
  62         }
  63
  64         ovl->get_overlay_info(ovl, &info);
  65
  66         info.pos_x = pi->pos_x;
  67         info.pos_y = pi->pos_y;
  68         info.out_width = pi->out_width;
  69         info.out_height = pi->out_height;
  70         info.enabled = pi->enabled;
  71
  72         r = ovl->set_overlay_info(ovl, &info);
  73         if (r)
  74                 goto out;
  75
  76         if (ovl->manager) {
  77                 r = ovl->manager->apply(ovl->manager);
  78                 if (r)
  79                         goto out;
  80         }
  81
  82 out:
  83         if (r)
  84                 dev_err(fbdev->dev, "setup_plane failed\n");
  85         return r;
  86 }
  87
  88 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
  89 {
  90         struct omapfb_info *ofbi = FB2OFB(fbi);
  91
  92         if (ofbi->num_overlays != 1) {
  93                 memset(pi, 0, sizeof(*pi));
  94         } else {
  95                 struct omap_overlay_info *ovli;
  96                 struct omap_overlay *ovl;
  97
  98                 ovl = ofbi->overlays[0];
  99                 ovli = &ovl->info;
 100
 101                 pi->pos_x = ovli->pos_x;
 102                 pi->pos_y = ovli->pos_y;
 103                 pi->enabled = ovli->enabled;
 104                 pi->channel_out = 0; /* xxx */
 105                 pi->mirror = 0;
 106                 pi->out_width = ovli->out_width;
 107                 pi->out_height = ovli->out_height;
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
 114 {
 115         struct omapfb_info *ofbi = FB2OFB(fbi);
 116         struct omapfb2_device *fbdev = ofbi->fbdev;
 117         struct omapfb2_mem_region *rg;
 118         int r, i;
 119         size_t size;
 120
 121         if (mi->type > OMAPFB_MEMTYPE_MAX)
 122                 return -EINVAL;
 123
 124         size = PAGE_ALIGN(mi->size);
 125
 126         rg = &ofbi->region;
 127
 128         for (i = 0; i < ofbi->num_overlays; i++) {
 129                 if (ofbi->overlays[i]->info.enabled)
 130                         return -EBUSY;
 131         }
 132
 133         if (rg->size != size || rg->type != mi->type) {
 134                 r = omapfb_realloc_fbmem(fbi, size, mi->type);
 135                 if (r) {
 136                         dev_err(fbdev->dev, "realloc fbmem failed\n");
 137                         return r;
 138                 }
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
 145 {
 146         struct omapfb_info *ofbi = FB2OFB(fbi);
 147         struct omapfb2_mem_region *rg;
 148
 149         rg = &ofbi->region;
 150         memset(mi, 0, sizeof(*mi));
 151
 152         mi->size = rg->size;
 153         mi->type = rg->type;
 154
 155         return 0;
 156 }
 157
 158 static int omapfb_update_window_nolock(struct fb_info *fbi,
 159                 u32 x, u32 y, u32 w, u32 h)
 160 {
 161         struct omap_dss_device *display = fb2display(fbi);
 162         u16 dw, dh;
 163
 164         if (!display)
 165                 return 0;
 166
 167         if (w == 0 || h == 0)
 168                 return 0;
 169
 170         display->get_resolution(display, &dw, &dh);
 171
 172         if (x + w > dw || y + h > dh)
 173                 return -EINVAL;
 174
 175         return display->update(display, x, y, w, h);
 176 }
 177
 178 /* This function is exported for SGX driver use */
 179 int omapfb_update_window(struct fb_info *fbi,
 180                 u32 x, u32 y, u32 w, u32 h)
 181 {
 182         struct omapfb_info *ofbi = FB2OFB(fbi);
 183         struct omapfb2_device *fbdev = ofbi->fbdev;
 184         int r;
 185
 186         omapfb_lock(fbdev);
 187         lock_fb_info(fbi);
 188
 189         r = omapfb_update_window_nolock(fbi, x, y, w, h);
 190
 191         unlock_fb_info(fbi);
 192         omapfb_unlock(fbdev);
 193
 194         return r;
 195 }
 196 EXPORT_SYMBOL(omapfb_update_window);
 197
 198 static int omapfb_set_update_mode(struct fb_info *fbi,
 199                                    enum omapfb_update_mode mode)
 200 {
 201         struct omap_dss_device *display = fb2display(fbi);
 202         enum omap_dss_update_mode um;
 203         int r;
 204
 205         if (!display || !display->set_update_mode)
 206                 return -EINVAL;
 207
 208         switch (mode) {
 209         case OMAPFB_UPDATE_DISABLED:
 210                 um = OMAP_DSS_UPDATE_DISABLED;
 211                 break;
 212
 213         case OMAPFB_AUTO_UPDATE:
 214                 um = OMAP_DSS_UPDATE_AUTO;
 215                 break;
 216
 217         case OMAPFB_MANUAL_UPDATE:
 218                 um = OMAP_DSS_UPDATE_MANUAL;
 219                 break;
 220
 221         default:
 222                 return -EINVAL;
 223         }
 224
 225         r = display->set_update_mode(display, um);
 226
 227         return r;
 228 }
 229
 230 static int omapfb_get_update_mode(struct fb_info *fbi,
 231                 enum omapfb_update_mode *mode)
 232 {
 233         struct omap_dss_device *display = fb2display(fbi);
 234         enum omap_dss_update_mode m;
 235
 236         if (!display || !display->get_update_mode)
 237                 return -EINVAL;
 238
 239         m = display->get_update_mode(display);
 240
 241         switch (m) {
 242         case OMAP_DSS_UPDATE_DISABLED:
 243                 *mode = OMAPFB_UPDATE_DISABLED;
 244                 break;
 245         case OMAP_DSS_UPDATE_AUTO:
 246                 *mode = OMAPFB_AUTO_UPDATE;
 247                 break;
 248         case OMAP_DSS_UPDATE_MANUAL:
 249                 *mode = OMAPFB_MANUAL_UPDATE;
 250                 break;
 251         default:
 252                 BUG();
 253         }
 254
 255         return 0;
 256 }
 257
 258 /* XXX this color key handling is a hack... */
 259 static struct omapfb_color_key omapfb_color_keys[2];
 260
 261 static int _omapfb_set_color_key(struct omap_overlay_manager *mgr,
 262                 struct omapfb_color_key *ck)
 263 {
 264         struct omap_overlay_manager_info info;
 265         enum omap_dss_trans_key_type kt;
 266         int r;
 267
 268         mgr->get_manager_info(mgr, &info);
 269
 270         if (ck->key_type == OMAPFB_COLOR_KEY_DISABLED) {
 271                 info.trans_enabled = false;
 272                 omapfb_color_keys[mgr->id] = *ck;
 273
 274                 r = mgr->set_manager_info(mgr, &info);
 275                 if (r)
 276                         return r;
 277
 278                 r = mgr->apply(mgr);
 279
 280                 return r;
 281         }
 282
 283         switch (ck->key_type) {
 284         case OMAPFB_COLOR_KEY_GFX_DST:
 285                 kt = OMAP_DSS_COLOR_KEY_GFX_DST;
 286                 break;
 287         case OMAPFB_COLOR_KEY_VID_SRC:
 288                 kt = OMAP_DSS_COLOR_KEY_VID_SRC;
 289                 break;
 290         default:
 291                 return -EINVAL;
 292         }
 293
 294         info.default_color = ck->background;
 295         info.trans_key = ck->trans_key;
 296         info.trans_key_type = kt;
 297         info.trans_enabled = true;
 298
 299         omapfb_color_keys[mgr->id] = *ck;
 300
 301         r = mgr->set_manager_info(mgr, &info);
 302         if (r)
 303                 return r;
 304
 305         r = mgr->apply(mgr);
 306
 307         return r;
 308 }
 309
 310 static int omapfb_set_color_key(struct fb_info *fbi,
 311                 struct omapfb_color_key *ck)
 312 {
 313         struct omapfb_info *ofbi = FB2OFB(fbi);
 314         struct omapfb2_device *fbdev = ofbi->fbdev;
 315         int r;
 316         int i;
 317         struct omap_overlay_manager *mgr = NULL;
 318
 319         omapfb_lock(fbdev);
 320
 321         for (i = 0; i < ofbi->num_overlays; i++) {
 322                 if (ofbi->overlays[i]->manager) {
 323                         mgr = ofbi->overlays[i]->manager;
 324                         break;
 325                 }
 326         }
 327
 328         if (!mgr) {
 329                 r = -EINVAL;
 330                 goto err;
 331         }
 332
 333         r = _omapfb_set_color_key(mgr, ck);
 334 err:
 335         omapfb_unlock(fbdev);
 336
 337         return r;
 338 }
 339
 340 static int omapfb_get_color_key(struct fb_info *fbi,
 341                 struct omapfb_color_key *ck)
 342 {
 343         struct omapfb_info *ofbi = FB2OFB(fbi);
 344         struct omapfb2_device *fbdev = ofbi->fbdev;
 345         struct omap_overlay_manager *mgr = NULL;
 346         int r = 0;
 347         int i;
 348
 349         omapfb_lock(fbdev);
 350
 351         for (i = 0; i < ofbi->num_overlays; i++) {
 352                 if (ofbi->overlays[i]->manager) {
 353                         mgr = ofbi->overlays[i]->manager;
 354                         break;
 355                 }
 356         }
 357
 358         if (!mgr) {
 359                 r = -EINVAL;
 360                 goto err;
 361         }
 362
 363         *ck = omapfb_color_keys[mgr->id];
 364 err:
 365         omapfb_unlock(fbdev);
 366
 367         return r;
 368 }
 369
 370 static int omapfb_memory_read(struct fb_info *fbi,
 371                 struct omapfb_memory_read *mr)
 372 {
 373         struct omap_dss_device *display = fb2display(fbi);
 374         void *buf;
 375         int r;
 376
 377         if (!display || !display->memory_read)
 378                 return -ENOENT;
 379
 380         if (!access_ok(VERIFY_WRITE, mr->buffer, mr->buffer_size))
 381                 return -EFAULT;
 382
 383         if (mr->w * mr->h * 3 > mr->buffer_size)
 384                 return -EINVAL;
 385
 386         buf = vmalloc(mr->buffer_size);
 387         if (!buf) {
 388                 DBG("vmalloc failed\n");
 389                 return -ENOMEM;
 390         }
 391
 392         r = display->memory_read(display, buf, mr->buffer_size,
 393                         mr->x, mr->y, mr->w, mr->h);
 394
 395         if (r > 0) {
 396                 if (copy_to_user(mr->buffer, buf, mr->buffer_size))
 397                         r = -EFAULT;
 398         }
 399
 400         vfree(buf);
 401
 402         return r;
 403 }
 404
 405 static int omapfb_get_ovl_colormode(struct omapfb2_device *fbdev,
 406                              struct omapfb_ovl_colormode *mode)
 407 {
 408         int ovl_idx = mode->overlay_idx;
 409         int mode_idx = mode->mode_idx;
 410         struct omap_overlay *ovl;
 411         enum omap_color_mode supported_modes;
 412         struct fb_var_screeninfo var;
 413         int i;
 414
 415         if (ovl_idx >= fbdev->num_overlays)
 416                 return -ENODEV;
 417         ovl = fbdev->overlays[ovl_idx];
 418         supported_modes = ovl->supported_modes;
 419
 420         mode_idx = mode->mode_idx;
 421
 422         for (i = 0; i < sizeof(supported_modes) * 8; i++) {
 423                 if (!(supported_modes & (1 << i)))
 424                         continue;
 425                 /*
 426                  * It's possible that the FB doesn't support a mode
 427                  * that is supported by the overlay, so call the
 428                  * following here.
 429                  */
 430                 if (dss_mode_to_fb_mode(1 << i, &var) < 0)
 431                         continue;
 432
 433                 mode_idx--;
 434                 if (mode_idx < 0)
 435                         break;
 436         }
 437
 438         if (i == sizeof(supported_modes) * 8)
 439                 return -ENOENT;
 440
 441         mode->bits_per_pixel = var.bits_per_pixel;
 442         mode->nonstd = var.nonstd;
 443         mode->red = var.red;
 444         mode->green = var.green;
 445         mode->blue = var.blue;
 446         mode->transp = var.transp;
 447
 448         return 0;
 449 }
 450
 451 static int omapfb_wait_for_go(struct fb_info *fbi)
 452 {
 453         struct omapfb_info *ofbi = FB2OFB(fbi);
 454         int r = 0;
 455         int i;
 456
 457         for (i = 0; i < ofbi->num_overlays; ++i) {
 458                 struct omap_overlay *ovl = ofbi->overlays[i];
 459                 r = ovl->wait_for_go(ovl);
 460                 if (r)
 461                         break;
 462         }
 463
 464         return r;
 465 }
 466
 467 int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
 468 {
 469         struct omapfb_info *ofbi = FB2OFB(fbi);
 470         struct omapfb2_device *fbdev = ofbi->fbdev;
 471         struct omap_dss_device *display = fb2display(fbi);
 472
 473         union {
 474                 struct omapfb_update_window_old uwnd_o;
 475                 struct omapfb_update_window     uwnd;
 476                 struct omapfb_plane_info        plane_info;
 477                 struct omapfb_caps              caps;
 478                 struct omapfb_mem_info          mem_info;
 479                 struct omapfb_color_key         color_key;
 480                 struct omapfb_ovl_colormode     ovl_colormode;
 481                 enum omapfb_update_mode         update_mode;
 482                 int test_num;
 483                 struct omapfb_memory_read       memory_read;
 484                 struct omapfb_vram_info         vram_info;
 485                 struct omapfb_tearsync_info     tearsync_info;
 486         } p;
 487
 488         int r = 0;
 489
 490         switch (cmd) {
 491         case OMAPFB_SYNC_GFX:
 492                 DBG("ioctl SYNC_GFX\n");
 493                 if (!display || !display->sync) {
 494                         /* DSS1 never returns an error here, so we neither */
 495                         /*r = -EINVAL;*/
 496                         break;
 497                 }
 498
 499                 r = display->sync(display);
 500                 break;
 501
 502         case OMAPFB_UPDATE_WINDOW_OLD:
 503                 DBG("ioctl UPDATE_WINDOW_OLD\n");
 504                 if (!display || !display->update) {
 505                         r = -EINVAL;
 506                         break;
 507                 }
 508
 509                 if (copy_from_user(&p.uwnd_o,
 510                                         (void __user *)arg,
 511                                         sizeof(p.uwnd_o))) {
 512                         r = -EFAULT;
 513                         break;
 514                 }
 515
 516                 r = omapfb_update_window_nolock(fbi, p.uwnd_o.x, p.uwnd_o.y,
 517                                 p.uwnd_o.width, p.uwnd_o.height);
 518                 break;
 519
 520         case OMAPFB_UPDATE_WINDOW:
 521                 DBG("ioctl UPDATE_WINDOW\n");
 522                 if (!display || !display->update) {
 523                         r = -EINVAL;
 524                         break;
 525                 }
 526
 527                 if (copy_from_user(&p.uwnd, (void __user *)arg,
 528                                         sizeof(p.uwnd))) {
 529                         r = -EFAULT;
 530                         break;
 531                 }
 532
 533                 r = omapfb_update_window_nolock(fbi, p.uwnd.x, p.uwnd.y,
 534                                 p.uwnd.width, p.uwnd.height);
 535                 break;
 536
 537         case OMAPFB_SETUP_PLANE:
 538                 DBG("ioctl SETUP_PLANE\n");
 539                 if (copy_from_user(&p.plane_info, (void __user *)arg,
 540                                         sizeof(p.plane_info)))
 541                         r = -EFAULT;
 542                 else
 543                         r = omapfb_setup_plane(fbi, &p.plane_info);
 544                 break;
 545
 546         case OMAPFB_QUERY_PLANE:
 547                 DBG("ioctl QUERY_PLANE\n");
 548                 r = omapfb_query_plane(fbi, &p.plane_info);
 549                 if (r < 0)
 550                         break;
 551                 if (copy_to_user((void __user *)arg, &p.plane_info,
 552                                         sizeof(p.plane_info)))
 553                         r = -EFAULT;
 554                 break;
 555
 556         case OMAPFB_SETUP_MEM:
 557                 DBG("ioctl SETUP_MEM\n");
 558                 if (copy_from_user(&p.mem_info, (void __user *)arg,
 559                                         sizeof(p.mem_info)))
 560                         r = -EFAULT;
 561                 else
 562                         r = omapfb_setup_mem(fbi, &p.mem_info);
 563                 break;
 564
 565         case OMAPFB_QUERY_MEM:
 566                 DBG("ioctl QUERY_MEM\n");
 567                 r = omapfb_query_mem(fbi, &p.mem_info);
 568                 if (r < 0)
 569                         break;
 570                 if (copy_to_user((void __user *)arg, &p.mem_info,
 571                                         sizeof(p.mem_info)))
 572                         r = -EFAULT;
 573                 break;
 574
 575         case OMAPFB_GET_CAPS:
 576                 DBG("ioctl GET_CAPS\n");
 577                 if (!display) {
 578                         r = -EINVAL;
 579                         break;
 580                 }
 581
 582                 memset(&p.caps, 0, sizeof(p.caps));
 583                 if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
 584                         p.caps.ctrl |= OMAPFB_CAPS_MANUAL_UPDATE;
 585                 if (display->caps & OMAP_DSS_DISPLAY_CAP_TEAR_ELIM)
 586                         p.caps.ctrl |= OMAPFB_CAPS_TEARSYNC;
 587
 588                 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
 589                         r = -EFAULT;
 590                 break;
 591
 592         case OMAPFB_GET_OVERLAY_COLORMODE:
 593                 DBG("ioctl GET_OVERLAY_COLORMODE\n");
 594                 if (copy_from_user(&p.ovl_colormode, (void __user *)arg,
 595                                    sizeof(p.ovl_colormode))) {
 596                         r = -EFAULT;
 597                         break;
 598                 }
 599                 r = omapfb_get_ovl_colormode(fbdev, &p.ovl_colormode);
 600                 if (r < 0)
 601                         break;
 602                 if (copy_to_user((void __user *)arg, &p.ovl_colormode,
 603                                  sizeof(p.ovl_colormode)))
 604                         r = -EFAULT;
 605                 break;
 606
 607         case OMAPFB_SET_UPDATE_MODE:
 608                 DBG("ioctl SET_UPDATE_MODE\n");
 609                 if (get_user(p.update_mode, (int __user *)arg))
 610                         r = -EFAULT;
 611                 else
 612                         r = omapfb_set_update_mode(fbi, p.update_mode);
 613                 break;
 614
 615         case OMAPFB_GET_UPDATE_MODE:
 616                 DBG("ioctl GET_UPDATE_MODE\n");
 617                 r = omapfb_get_update_mode(fbi, &p.update_mode);
 618                 if (r)
 619                         break;
 620                 if (put_user(p.update_mode,
 621                                         (enum omapfb_update_mode __user *)arg))
 622                         r = -EFAULT;
 623                 break;
 624
 625         case OMAPFB_SET_COLOR_KEY:
 626                 DBG("ioctl SET_COLOR_KEY\n");
 627                 if (copy_from_user(&p.color_key, (void __user *)arg,
 628                                    sizeof(p.color_key)))
 629                         r = -EFAULT;
 630                 else
 631                         r = omapfb_set_color_key(fbi, &p.color_key);
 632                 break;
 633
 634         case OMAPFB_GET_COLOR_KEY:
 635                 DBG("ioctl GET_COLOR_KEY\n");
 636                 r = omapfb_get_color_key(fbi, &p.color_key);
 637                 if (r)
 638                         break;
 639                 if (copy_to_user((void __user *)arg, &p.color_key,
 640                                  sizeof(p.color_key)))
 641                         r = -EFAULT;
 642                 break;
 643
 644         case OMAPFB_WAITFORVSYNC:
 645                 DBG("ioctl WAITFORVSYNC\n");
 646                 if (!display) {
 647                         r = -EINVAL;
 648                         break;
 649                 }
 650
 651                 r = display->wait_vsync(display);
 652                 break;
 653
 654         case OMAPFB_WAITFORGO:
 655                 DBG("ioctl WAITFORGO\n");
 656                 if (!display) {
 657                         r = -EINVAL;
 658                         break;
 659                 }
 660
 661                 r = omapfb_wait_for_go(fbi);
 662                 break;
 663
 664         /* LCD and CTRL tests do the same thing for backward
 665          * compatibility */
 666         case OMAPFB_LCD_TEST:
 667                 DBG("ioctl LCD_TEST\n");
 668                 if (get_user(p.test_num, (int __user *)arg)) {
 669                         r = -EFAULT;
 670                         break;
 671                 }
 672                 if (!display || !display->run_test) {
 673                         r = -EINVAL;
 674                         break;
 675                 }
 676
 677                 r = display->run_test(display, p.test_num);
 678
 679                 break;
 680
 681         case OMAPFB_CTRL_TEST:
 682                 DBG("ioctl CTRL_TEST\n");
 683                 if (get_user(p.test_num, (int __user *)arg)) {
 684                         r = -EFAULT;
 685                         break;
 686                 }
 687                 if (!display || !display->run_test) {
 688                         r = -EINVAL;
 689                         break;
 690                 }
 691
 692                 r = display->run_test(display, p.test_num);
 693
 694                 break;
 695
 696         case OMAPFB_MEMORY_READ:
 697                 DBG("ioctl MEMORY_READ\n");
 698
 699                 if (copy_from_user(&p.memory_read, (void __user *)arg,
 700                                         sizeof(p.memory_read))) {
 701                         r = -EFAULT;
 702                         break;
 703                 }
 704
 705                 r = omapfb_memory_read(fbi, &p.memory_read);
 706
 707                 break;
 708
 709         case OMAPFB_GET_VRAM_INFO: {
 710                 unsigned long vram, free, largest;
 711
 712                 DBG("ioctl GET_VRAM_INFO\n");
 713
 714                 omap_vram_get_info(&vram, &free, &largest);
 715                 p.vram_info.total = vram;
 716                 p.vram_info.free = free;
 717                 p.vram_info.largest_free_block = largest;
 718
 719                 if (copy_to_user((void __user *)arg, &p.vram_info,
 720                                         sizeof(p.vram_info)))
 721                         r = -EFAULT;
 722                 break;
 723         }
 724
 725         case OMAPFB_SET_TEARSYNC: {
 726                 DBG("ioctl SET_TEARSYNC\n");
 727
 728                 if (copy_from_user(&p.tearsync_info, (void __user *)arg,
 729                                         sizeof(p.tearsync_info))) {
 730                         r = -EFAULT;
 731                         break;
 732                 }
 733
 734                 if (!display->enable_te) {
 735                         r = -ENODEV;
 736                         break;
 737                 }
 738
 739                 r = display->enable_te(display, !!p.tearsync_info.enabled);
 740
 741                 break;
 742         }
 743
 744         default:
 745                 dev_err(fbdev->dev, "Unknown ioctl 0x%x\n", cmd);
 746                 r = -EINVAL;
 747         }
 748
 749         if (r < 0)
 750                 DBG("ioctl failed: %d\n", r);
 751
 752         return r;
 753 }
 754
 755