release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/video/omap2/dss/display.c

   1 /*
   2  * linux/drivers/video/omap2/dss/display.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 "DISPLAY"
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/list.h>
  29 #include <linux/platform_device.h>
  30
  31 #include <plat/display.h>
  32 #include "dss.h"
  33
  34 static LIST_HEAD(display_list);
  35
  36 static ssize_t display_enabled_show(struct device *dev,
  37                 struct device_attribute *attr, char *buf)
  38 {
  39         struct omap_dss_device *dssdev = to_dss_device(dev);
  40         bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
  41
  42         return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
  43 }
  44
  45 static ssize_t display_enabled_store(struct device *dev,
  46                 struct device_attribute *attr,
  47                 const char *buf, size_t size)
  48 {
  49         struct omap_dss_device *dssdev = to_dss_device(dev);
  50         bool enabled, r;
  51
  52         enabled = simple_strtoul(buf, NULL, 10);
  53
  54         if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
  55                 if (enabled) {
  56                         r = dssdev->driver->enable(dssdev);
  57                         if (r)
  58                                 return r;
  59                 } else {
  60                         dssdev->driver->disable(dssdev);
  61                 }
  62         }
  63
  64         return size;
  65 }
  66
  67 static ssize_t display_upd_mode_show(struct device *dev,
  68                 struct device_attribute *attr, char *buf)
  69 {
  70         struct omap_dss_device *dssdev = to_dss_device(dev);
  71         enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO;
  72         if (dssdev->driver->get_update_mode)
  73                 mode = dssdev->driver->get_update_mode(dssdev);
  74         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
  75 }
  76
  77 static ssize_t display_upd_mode_store(struct device *dev,
  78                 struct device_attribute *attr,
  79                 const char *buf, size_t size)
  80 {
  81         struct omap_dss_device *dssdev = to_dss_device(dev);
  82         int val, r;
  83         enum omap_dss_update_mode mode;
  84
  85         if (!dssdev->driver->set_update_mode)
  86                 return -EINVAL;
  87
  88         val = simple_strtoul(buf, NULL, 10);
  89
  90         switch (val) {
  91         case OMAP_DSS_UPDATE_DISABLED:
  92         case OMAP_DSS_UPDATE_AUTO:
  93         case OMAP_DSS_UPDATE_MANUAL:
  94                 mode = (enum omap_dss_update_mode)val;
  95                 break;
  96         default:
  97                 return -EINVAL;
  98         }
  99
 100         r = dssdev->driver->set_update_mode(dssdev, mode);
 101         if (r)
 102                 return r;
 103
 104         return size;
 105 }
 106
 107 static ssize_t display_tear_show(struct device *dev,
 108                 struct device_attribute *attr, char *buf)
 109 {
 110         struct omap_dss_device *dssdev = to_dss_device(dev);
 111         return snprintf(buf, PAGE_SIZE, "%d\n",
 112                         dssdev->driver->get_te ?
 113                         dssdev->driver->get_te(dssdev) : 0);
 114 }
 115
 116 static ssize_t display_tear_store(struct device *dev,
 117                 struct device_attribute *attr, const char *buf, size_t size)
 118 {
 119         struct omap_dss_device *dssdev = to_dss_device(dev);
 120         unsigned long te;
 121         int r;
 122
 123         if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
 124                 return -ENOENT;
 125
 126         te = simple_strtoul(buf, NULL, 0);
 127
 128         r = dssdev->driver->enable_te(dssdev, te);
 129         if (r)
 130                 return r;
 131
 132         return size;
 133 }
 134
 135 static ssize_t display_timings_show(struct device *dev,
 136                 struct device_attribute *attr, char *buf)
 137 {
 138         struct omap_dss_device *dssdev = to_dss_device(dev);
 139         struct omap_video_timings t;
 140
 141         if (!dssdev->driver->get_timings)
 142                 return -ENOENT;
 143
 144         dssdev->driver->get_timings(dssdev, &t);
 145
 146         return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 147                         t.pixel_clock,
 148                         t.x_res, t.hfp, t.hbp, t.hsw,
 149                         t.y_res, t.vfp, t.vbp, t.vsw);
 150 }
 151
 152 static ssize_t display_timings_store(struct device *dev,
 153                 struct device_attribute *attr, const char *buf, size_t size)
 154 {
 155         struct omap_dss_device *dssdev = to_dss_device(dev);
 156         struct omap_video_timings t;
 157         int r, found;
 158
 159         if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
 160                 return -ENOENT;
 161
 162         found = 0;
 163 #ifdef CONFIG_OMAP2_DSS_VENC
 164         if (strncmp("pal", buf, 3) == 0) {
 165                 t = omap_dss_pal_timings;
 166                 found = 1;
 167         } else if (strncmp("ntsc", buf, 4) == 0) {
 168                 t = omap_dss_ntsc_timings;
 169                 found = 1;
 170         }
 171 #endif
 172         if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
 173                                 &t.pixel_clock,
 174                                 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
 175                                 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
 176                 return -EINVAL;
 177
 178         r = dssdev->driver->check_timings(dssdev, &t);
 179         if (r)
 180                 return r;
 181
 182         dssdev->driver->set_timings(dssdev, &t);
 183
 184         return size;
 185 }
 186
 187 static ssize_t display_rotate_show(struct device *dev,
 188                 struct device_attribute *attr, char *buf)
 189 {
 190         struct omap_dss_device *dssdev = to_dss_device(dev);
 191         int rotate;
 192         if (!dssdev->driver->get_rotate)
 193                 return -ENOENT;
 194         rotate = dssdev->driver->get_rotate(dssdev);
 195         return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
 196 }
 197
 198 static ssize_t display_rotate_store(struct device *dev,
 199                 struct device_attribute *attr, const char *buf, size_t size)
 200 {
 201         struct omap_dss_device *dssdev = to_dss_device(dev);
 202         unsigned long rot;
 203         int r;
 204
 205         if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
 206                 return -ENOENT;
 207
 208         rot = simple_strtoul(buf, NULL, 0);
 209
 210         r = dssdev->driver->set_rotate(dssdev, rot);
 211         if (r)
 212                 return r;
 213
 214         return size;
 215 }
 216
 217 static ssize_t display_mirror_show(struct device *dev,
 218                 struct device_attribute *attr, char *buf)
 219 {
 220         struct omap_dss_device *dssdev = to_dss_device(dev);
 221         int mirror;
 222         if (!dssdev->driver->get_mirror)
 223                 return -ENOENT;
 224         mirror = dssdev->driver->get_mirror(dssdev);
 225         return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
 226 }
 227
 228 static ssize_t display_mirror_store(struct device *dev,
 229                 struct device_attribute *attr, const char *buf, size_t size)
 230 {
 231         struct omap_dss_device *dssdev = to_dss_device(dev);
 232         unsigned long mirror;
 233         int r;
 234
 235         if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
 236                 return -ENOENT;
 237
 238         mirror = simple_strtoul(buf, NULL, 0);
 239
 240         r = dssdev->driver->set_mirror(dssdev, mirror);
 241         if (r)
 242                 return r;
 243
 244         return size;
 245 }
 246
 247 static ssize_t display_wss_show(struct device *dev,
 248                 struct device_attribute *attr, char *buf)
 249 {
 250         struct omap_dss_device *dssdev = to_dss_device(dev);
 251         unsigned int wss;
 252
 253         if (!dssdev->driver->get_wss)
 254                 return -ENOENT;
 255
 256         wss = dssdev->driver->get_wss(dssdev);
 257
 258         return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
 259 }
 260
 261 static ssize_t display_wss_store(struct device *dev,
 262                 struct device_attribute *attr, const char *buf, size_t size)
 263 {
 264         struct omap_dss_device *dssdev = to_dss_device(dev);
 265         unsigned long wss;
 266         int r;
 267
 268         if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
 269                 return -ENOENT;
 270
 271         if (strict_strtoul(buf, 0, &wss))
 272                 return -EINVAL;
 273
 274         if (wss > 0xfffff)
 275                 return -EINVAL;
 276
 277         r = dssdev->driver->set_wss(dssdev, wss);
 278         if (r)
 279                 return r;
 280
 281         return size;
 282 }
 283
 284 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
 285                 display_enabled_show, display_enabled_store);
 286 static DEVICE_ATTR(update_mode, S_IRUGO|S_IWUSR,
 287                 display_upd_mode_show, display_upd_mode_store);
 288 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
 289                 display_tear_show, display_tear_store);
 290 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
 291                 display_timings_show, display_timings_store);
 292 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
 293                 display_rotate_show, display_rotate_store);
 294 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
 295                 display_mirror_show, display_mirror_store);
 296 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
 297                 display_wss_show, display_wss_store);
 298
 299 static struct device_attribute *display_sysfs_attrs[] = {
 300         &dev_attr_enabled,
 301         &dev_attr_update_mode,
 302         &dev_attr_tear_elim,
 303         &dev_attr_timings,
 304         &dev_attr_rotate,
 305         &dev_attr_mirror,
 306         &dev_attr_wss,
 307         NULL
 308 };
 309
 310 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
 311                         u16 *xres, u16 *yres)
 312 {
 313         *xres = dssdev->panel.timings.x_res;
 314         *yres = dssdev->panel.timings.y_res;
 315 }
 316 EXPORT_SYMBOL(omapdss_default_get_resolution);
 317
 318 void default_get_overlay_fifo_thresholds(enum omap_plane plane,
 319                 u32 fifo_size, enum omap_burst_size *burst_size,
 320                 u32 *fifo_low, u32 *fifo_high)
 321 {
 322         unsigned burst_size_bytes;
 323
 324         *burst_size = OMAP_DSS_BURST_16x32;
 325         burst_size_bytes = 16 * 32 / 8;
 326
 327         *fifo_high = fifo_size - 1;
 328         *fifo_low = fifo_size - burst_size_bytes;
 329 }
 330
 331 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
 332 {
 333         switch (dssdev->type) {
 334         case OMAP_DISPLAY_TYPE_DPI:
 335                 if (dssdev->phy.dpi.data_lines == 24)
 336                         return 24;
 337                 else
 338                         return 16;
 339
 340         case OMAP_DISPLAY_TYPE_DBI:
 341         case OMAP_DISPLAY_TYPE_DSI:
 342                 if (dssdev->ctrl.pixel_size == 24)
 343                         return 24;
 344                 else
 345                         return 16;
 346         case OMAP_DISPLAY_TYPE_VENC:
 347         case OMAP_DISPLAY_TYPE_SDI:
 348                 return 24;
 349         default:
 350                 BUG();
 351         }
 352 }
 353 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
 354
 355 /* Checks if replication logic should be used. Only use for active matrix,
 356  * when overlay is in RGB12U or RGB16 mode, and LCD interface is
 357  * 18bpp or 24bpp */
 358 bool dss_use_replication(struct omap_dss_device *dssdev,
 359                 enum omap_color_mode mode)
 360 {
 361         int bpp;
 362
 363         if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
 364                 return false;
 365
 366         if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
 367                         (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
 368                 return false;
 369
 370         switch (dssdev->type) {
 371         case OMAP_DISPLAY_TYPE_DPI:
 372                 bpp = dssdev->phy.dpi.data_lines;
 373                 break;
 374         case OMAP_DISPLAY_TYPE_VENC:
 375         case OMAP_DISPLAY_TYPE_SDI:
 376                 bpp = 24;
 377                 break;
 378         case OMAP_DISPLAY_TYPE_DBI:
 379         case OMAP_DISPLAY_TYPE_DSI:
 380                 bpp = dssdev->ctrl.pixel_size;
 381                 break;
 382         default:
 383                 BUG();
 384         }
 385
 386         return bpp > 16;
 387 }
 388
 389 void dss_init_device(struct platform_device *pdev,
 390                 struct omap_dss_device *dssdev)
 391 {
 392         struct device_attribute *attr;
 393         int i;
 394         int r;
 395
 396         switch (dssdev->type) {
 397 #ifdef CONFIG_OMAP2_DSS_DPI
 398         case OMAP_DISPLAY_TYPE_DPI:
 399 #endif
 400 #ifdef CONFIG_OMAP2_DSS_RFBI
 401         case OMAP_DISPLAY_TYPE_DBI:
 402 #endif
 403 #ifdef CONFIG_OMAP2_DSS_SDI
 404         case OMAP_DISPLAY_TYPE_SDI:
 405 #endif
 406 #ifdef CONFIG_OMAP2_DSS_DSI
 407         case OMAP_DISPLAY_TYPE_DSI:
 408 #endif
 409 #ifdef CONFIG_OMAP2_DSS_VENC
 410         case OMAP_DISPLAY_TYPE_VENC:
 411 #endif
 412                 break;
 413         default:
 414                 DSSERR("Support for display '%s' not compiled in.\n",
 415                                 dssdev->name);
 416                 return;
 417         }
 418
 419         switch (dssdev->type) {
 420 #ifdef CONFIG_OMAP2_DSS_DPI
 421         case OMAP_DISPLAY_TYPE_DPI:
 422                 r = dpi_init_display(dssdev);
 423                 break;
 424 #endif
 425 #ifdef CONFIG_OMAP2_DSS_RFBI
 426         case OMAP_DISPLAY_TYPE_DBI:
 427                 r = rfbi_init_display(dssdev);
 428                 break;
 429 #endif
 430 #ifdef CONFIG_OMAP2_DSS_VENC
 431         case OMAP_DISPLAY_TYPE_VENC:
 432                 r = venc_init_display(dssdev);
 433                 break;
 434 #endif
 435 #ifdef CONFIG_OMAP2_DSS_SDI
 436         case OMAP_DISPLAY_TYPE_SDI:
 437                 r = sdi_init_display(dssdev);
 438                 break;
 439 #endif
 440 #ifdef CONFIG_OMAP2_DSS_DSI
 441         case OMAP_DISPLAY_TYPE_DSI:
 442                 r = dsi_init_display(dssdev);
 443                 break;
 444 #endif
 445         default:
 446                 BUG();
 447         }
 448
 449         if (r) {
 450                 DSSERR("failed to init display %s\n", dssdev->name);
 451                 return;
 452         }
 453
 454         /* create device sysfs files */
 455         i = 0;
 456         while ((attr = display_sysfs_attrs[i++]) != NULL) {
 457                 r = device_create_file(&dssdev->dev, attr);
 458                 if (r)
 459                         DSSERR("failed to create sysfs file\n");
 460         }
 461
 462         /* create display? sysfs links */
 463         r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
 464                         dev_name(&dssdev->dev));
 465         if (r)
 466                 DSSERR("failed to create sysfs display link\n");
 467 }
 468
 469 void dss_uninit_device(struct platform_device *pdev,
 470                 struct omap_dss_device *dssdev)
 471 {
 472         struct device_attribute *attr;
 473         int i = 0;
 474
 475         sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
 476
 477         while ((attr = display_sysfs_attrs[i++]) != NULL)
 478                 device_remove_file(&dssdev->dev, attr);
 479
 480         if (dssdev->manager)
 481                 dssdev->manager->unset_device(dssdev->manager);
 482 }
 483
 484 static int dss_suspend_device(struct device *dev, void *data)
 485 {
 486         int r;
 487         struct omap_dss_device *dssdev = to_dss_device(dev);
 488
 489         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
 490                 dssdev->activate_after_resume = false;
 491                 return 0;
 492         }
 493
 494         if (!dssdev->driver->suspend) {
 495                 DSSERR("display '%s' doesn't implement suspend\n",
 496                                 dssdev->name);
 497                 return -ENOSYS;
 498         }
 499
 500         r = dssdev->driver->suspend(dssdev);
 501         if (r)
 502                 return r;
 503
 504         dssdev->activate_after_resume = true;
 505
 506         return 0;
 507 }
 508
 509 int dss_suspend_all_devices(void)
 510 {
 511         int r;
 512         struct bus_type *bus = dss_get_bus();
 513
 514         r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
 515         if (r) {
 516                 /* resume all displays that were suspended */
 517                 dss_resume_all_devices();
 518                 return r;
 519         }
 520
 521         return 0;
 522 }
 523
 524 static int dss_resume_device(struct device *dev, void *data)
 525 {
 526         int r;
 527         struct omap_dss_device *dssdev = to_dss_device(dev);
 528
 529         if (dssdev->activate_after_resume && dssdev->driver->resume) {
 530                 r = dssdev->driver->resume(dssdev);
 531                 if (r)
 532                         return r;
 533         }
 534
 535         dssdev->activate_after_resume = false;
 536
 537         return 0;
 538 }
 539
 540 int dss_resume_all_devices(void)
 541 {
 542         struct bus_type *bus = dss_get_bus();
 543
 544         return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
 545 }
 546
 547 static int dss_disable_device(struct device *dev, void *data)
 548 {
 549         struct omap_dss_device *dssdev = to_dss_device(dev);
 550
 551         if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
 552                 dssdev->driver->disable(dssdev);
 553
 554         return 0;
 555 }
 556
 557 void dss_disable_all_devices(void)
 558 {
 559         struct bus_type *bus = dss_get_bus();
 560         bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
 561 }
 562
 563
 564 void omap_dss_get_device(struct omap_dss_device *dssdev)
 565 {
 566         get_device(&dssdev->dev);
 567 }
 568 EXPORT_SYMBOL(omap_dss_get_device);
 569
 570 void omap_dss_put_device(struct omap_dss_device *dssdev)
 571 {
 572         put_device(&dssdev->dev);
 573 }
 574 EXPORT_SYMBOL(omap_dss_put_device);
 575
 576 /* ref count of the found device is incremented. ref count
 577  * of from-device is decremented. */
 578 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
 579 {
 580         struct device *dev;
 581         struct device *dev_start = NULL;
 582         struct omap_dss_device *dssdev = NULL;
 583
 584         int match(struct device *dev, void *data)
 585         {
 586                 return 1;
 587         }
 588
 589         if (from)
 590                 dev_start = &from->dev;
 591         dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
 592         if (dev)
 593                 dssdev = to_dss_device(dev);
 594         if (from)
 595                 put_device(&from->dev);
 596
 597         return dssdev;
 598 }
 599 EXPORT_SYMBOL(omap_dss_get_next_device);
 600
 601 struct omap_dss_device *omap_dss_find_device(void *data,
 602                 int (*match)(struct omap_dss_device *dssdev, void *data))
 603 {
 604         struct omap_dss_device *dssdev = NULL;
 605
 606         while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
 607                 if (match(dssdev, data))
 608                         return dssdev;
 609         }
 610
 611         return NULL;
 612 }
 613 EXPORT_SYMBOL(omap_dss_find_device);
 614
 615 int omap_dss_start_device(struct omap_dss_device *dssdev)
 616 {
 617         if (!dssdev->driver) {
 618                 DSSDBG("no driver\n");
 619                 return -ENODEV;
 620         }
 621
 622         if (!try_module_get(dssdev->dev.driver->owner)) {
 623                 return -ENODEV;
 624         }
 625
 626         return 0;
 627 }
 628 EXPORT_SYMBOL(omap_dss_start_device);
 629
 630 void omap_dss_stop_device(struct omap_dss_device *dssdev)
 631 {
 632         module_put(dssdev->dev.driver->owner);
 633 }
 634 EXPORT_SYMBOL(omap_dss_stop_device);