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/platform_device.h>
  29
  30 #include <plat/display.h>
  31 #include "dss.h"
  32
  33 static ssize_t display_enabled_show(struct device *dev,
  34                 struct device_attribute *attr, char *buf)
  35 {
  36         struct omap_dss_device *dssdev = to_dss_device(dev);
  37         bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
  38
  39         return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
  40 }
  41
  42 static ssize_t display_enabled_store(struct device *dev,
  43                 struct device_attribute *attr,
  44                 const char *buf, size_t size)
  45 {
  46         struct omap_dss_device *dssdev = to_dss_device(dev);
  47         bool enabled, r;
  48
  49         enabled = simple_strtoul(buf, NULL, 10);
  50
  51         if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
  52                 if (enabled) {
  53                         r = dssdev->driver->enable(dssdev);
  54                         if (r)
  55                                 return r;
  56                 } else {
  57                         dssdev->driver->disable(dssdev);
  58                 }
  59         }
  60
  61         return size;
  62 }
  63
  64 static ssize_t display_upd_mode_show(struct device *dev,
  65                 struct device_attribute *attr, char *buf)
  66 {
  67         struct omap_dss_device *dssdev = to_dss_device(dev);
  68         enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO;
  69         if (dssdev->driver->get_update_mode)
  70                 mode = dssdev->driver->get_update_mode(dssdev);
  71         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
  72 }
  73
  74 static ssize_t display_upd_mode_store(struct device *dev,
  75                 struct device_attribute *attr,
  76                 const char *buf, size_t size)
  77 {
  78         struct omap_dss_device *dssdev = to_dss_device(dev);
  79         int val, r;
  80         enum omap_dss_update_mode mode;
  81
  82         if (!dssdev->driver->set_update_mode)
  83                 return -EINVAL;
  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         case OMAP_DISPLAY_TYPE_HDMI:
 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_HDMI:
 373         case OMAP_DISPLAY_TYPE_VENC:
 374         case OMAP_DISPLAY_TYPE_SDI:
 375                 bpp = 24;
 376                 break;
 377         case OMAP_DISPLAY_TYPE_DBI:
 378         case OMAP_DISPLAY_TYPE_DSI:
 379                 bpp = dssdev->ctrl.pixel_size;
 380                 break;
 381         default:
 382                 BUG();
 383         }
 384
 385         return bpp > 16;
 386 }
 387
 388 void dss_init_device(struct platform_device *pdev,
 389                 struct omap_dss_device *dssdev)
 390 {
 391         struct device_attribute *attr;
 392         int i;
 393         int r;
 394
 395         switch (dssdev->type) {
 396 #ifdef CONFIG_OMAP2_DSS_DPI
 397         case OMAP_DISPLAY_TYPE_DPI:
 398                 r = dpi_init_display(dssdev);
 399                 break;
 400 #endif
 401 #ifdef CONFIG_OMAP2_DSS_RFBI
 402         case OMAP_DISPLAY_TYPE_DBI:
 403                 r = rfbi_init_display(dssdev);
 404                 break;
 405 #endif
 406 #ifdef CONFIG_OMAP2_DSS_VENC
 407         case OMAP_DISPLAY_TYPE_VENC:
 408                 r = venc_init_display(dssdev);
 409                 break;
 410 #endif
 411 #ifdef CONFIG_OMAP2_DSS_SDI
 412         case OMAP_DISPLAY_TYPE_SDI:
 413                 r = sdi_init_display(dssdev);
 414                 break;
 415 #endif
 416 #ifdef CONFIG_OMAP2_DSS_DSI
 417         case OMAP_DISPLAY_TYPE_DSI:
 418                 r = dsi_init_display(dssdev);
 419                 break;
 420 #endif
 421         case OMAP_DISPLAY_TYPE_HDMI:
 422                 r = hdmi_init_display(dssdev);
 423                 break;
 424         default:
 425                 DSSERR("Support for display '%s' not compiled in.\n",
 426                                 dssdev->name);
 427                 return;
 428         }
 429
 430         if (r) {
 431                 DSSERR("failed to init display %s\n", dssdev->name);
 432                 return;
 433         }
 434
 435         /* create device sysfs files */
 436         i = 0;
 437         while ((attr = display_sysfs_attrs[i++]) != NULL) {
 438                 r = device_create_file(&dssdev->dev, attr);
 439                 if (r)
 440                         DSSERR("failed to create sysfs file\n");
 441         }
 442
 443         /* create display? sysfs links */
 444         r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
 445                         dev_name(&dssdev->dev));
 446         if (r)
 447                 DSSERR("failed to create sysfs display link\n");
 448 }
 449
 450 void dss_uninit_device(struct platform_device *pdev,
 451                 struct omap_dss_device *dssdev)
 452 {
 453         struct device_attribute *attr;
 454         int i = 0;
 455
 456         sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
 457
 458         while ((attr = display_sysfs_attrs[i++]) != NULL)
 459                 device_remove_file(&dssdev->dev, attr);
 460
 461         if (dssdev->manager)
 462                 dssdev->manager->unset_device(dssdev->manager);
 463 }
 464
 465 static int dss_suspend_device(struct device *dev, void *data)
 466 {
 467         int r;
 468         struct omap_dss_device *dssdev = to_dss_device(dev);
 469
 470         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
 471                 dssdev->activate_after_resume = false;
 472                 return 0;
 473         }
 474
 475         if (!dssdev->driver->suspend) {
 476                 DSSERR("display '%s' doesn't implement suspend\n",
 477                                 dssdev->name);
 478                 return -ENOSYS;
 479         }
 480
 481         r = dssdev->driver->suspend(dssdev);
 482         if (r)
 483                 return r;
 484
 485         dssdev->activate_after_resume = true;
 486
 487         return 0;
 488 }
 489
 490 int dss_suspend_all_devices(void)
 491 {
 492         int r;
 493         struct bus_type *bus = dss_get_bus();
 494
 495         r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
 496         if (r) {
 497                 /* resume all displays that were suspended */
 498                 dss_resume_all_devices();
 499                 return r;
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int dss_resume_device(struct device *dev, void *data)
 506 {
 507         int r;
 508         struct omap_dss_device *dssdev = to_dss_device(dev);
 509
 510         if (dssdev->activate_after_resume && dssdev->driver->resume) {
 511                 r = dssdev->driver->resume(dssdev);
 512                 if (r)
 513                         return r;
 514         }
 515
 516         dssdev->activate_after_resume = false;
 517
 518         return 0;
 519 }
 520
 521 int dss_resume_all_devices(void)
 522 {
 523         struct bus_type *bus = dss_get_bus();
 524
 525         return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
 526 }
 527
 528 static int dss_disable_device(struct device *dev, void *data)
 529 {
 530         struct omap_dss_device *dssdev = to_dss_device(dev);
 531
 532         if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
 533                 dssdev->driver->disable(dssdev);
 534
 535         return 0;
 536 }
 537
 538 void dss_disable_all_devices(void)
 539 {
 540         struct bus_type *bus = dss_get_bus();
 541         bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
 542 }
 543
 544
 545 void omap_dss_get_device(struct omap_dss_device *dssdev)
 546 {
 547         get_device(&dssdev->dev);
 548 }
 549 EXPORT_SYMBOL(omap_dss_get_device);
 550
 551 void omap_dss_put_device(struct omap_dss_device *dssdev)
 552 {
 553         put_device(&dssdev->dev);
 554 }
 555 EXPORT_SYMBOL(omap_dss_put_device);
 556
 557 /* ref count of the found device is incremented. ref count
 558  * of from-device is decremented. */
 559 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
 560 {
 561         struct device *dev;
 562         struct device *dev_start = NULL;
 563         struct omap_dss_device *dssdev = NULL;
 564
 565         int match(struct device *dev, void *data)
 566         {
 567                 return 1;
 568         }
 569
 570         if (from)
 571                 dev_start = &from->dev;
 572         dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
 573         if (dev)
 574                 dssdev = to_dss_device(dev);
 575         if (from)
 576                 put_device(&from->dev);
 577
 578         return dssdev;
 579 }
 580 EXPORT_SYMBOL(omap_dss_get_next_device);
 581
 582 struct omap_dss_device *omap_dss_find_device(void *data,
 583                 int (*match)(struct omap_dss_device *dssdev, void *data))
 584 {
 585         struct omap_dss_device *dssdev = NULL;
 586
 587         while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
 588                 if (match(dssdev, data))
 589                         return dssdev;
 590         }
 591
 592         return NULL;
 593 }
 594 EXPORT_SYMBOL(omap_dss_find_device);
 595
 596 int omap_dss_start_device(struct omap_dss_device *dssdev)
 597 {
 598         if (!dssdev->driver) {
 599                 DSSDBG("no driver\n");
 600                 return -ENODEV;
 601         }
 602
 603         if (!try_module_get(dssdev->dev.driver->owner)) {
 604                 return -ENODEV;
 605         }
 606
 607         return 0;
 608 }
 609 EXPORT_SYMBOL(omap_dss_start_device);
 610
 611 void omap_dss_stop_device(struct omap_dss_device *dssdev)
 612 {
 613         module_put(dssdev->dev.driver->owner);
 614 }
 615 EXPORT_SYMBOL(omap_dss_stop_device);
 616