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