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 <video/omapdss.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         int r, enabled;
  48
  49         r = kstrtoint(buf, 0, &enabled);
  50         if (r)
  51                 return r;
  52
  53         enabled = !!enabled;
  54
  55         if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
  56                 if (enabled) {
  57                         r = dssdev->driver->enable(dssdev);
  58                         if (r)
  59                                 return r;
  60                 } else {
  61                         dssdev->driver->disable(dssdev);
  62                 }
  63         }
  64
  65         return size;
  66 }
  67
  68 static ssize_t display_tear_show(struct device *dev,
  69                 struct device_attribute *attr, char *buf)
  70 {
  71         struct omap_dss_device *dssdev = to_dss_device(dev);
  72         return snprintf(buf, PAGE_SIZE, "%d\n",
  73                         dssdev->driver->get_te ?
  74                         dssdev->driver->get_te(dssdev) : 0);
  75 }
  76
  77 static ssize_t display_tear_store(struct device *dev,
  78                 struct device_attribute *attr, const char *buf, size_t size)
  79 {
  80         struct omap_dss_device *dssdev = to_dss_device(dev);
  81         int te, r;
  82
  83         if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
  84                 return -ENOENT;
  85
  86         r = kstrtoint(buf, 0, &te);
  87         if (r)
  88                 return r;
  89
  90         te = !!te;
  91
  92         r = dssdev->driver->enable_te(dssdev, te);
  93         if (r)
  94                 return r;
  95
  96         return size;
  97 }
  98
  99 static ssize_t display_timings_show(struct device *dev,
 100                 struct device_attribute *attr, char *buf)
 101 {
 102         struct omap_dss_device *dssdev = to_dss_device(dev);
 103         struct omap_video_timings t;
 104
 105         if (!dssdev->driver->get_timings)
 106                 return -ENOENT;
 107
 108         dssdev->driver->get_timings(dssdev, &t);
 109
 110         return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 111                         t.pixel_clock,
 112                         t.x_res, t.hfp, t.hbp, t.hsw,
 113                         t.y_res, t.vfp, t.vbp, t.vsw);
 114 }
 115
 116 static ssize_t display_timings_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         struct omap_video_timings t;
 121         int r, found;
 122
 123         if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
 124                 return -ENOENT;
 125
 126         found = 0;
 127 #ifdef CONFIG_OMAP2_DSS_VENC
 128         if (strncmp("pal", buf, 3) == 0) {
 129                 t = omap_dss_pal_timings;
 130                 found = 1;
 131         } else if (strncmp("ntsc", buf, 4) == 0) {
 132                 t = omap_dss_ntsc_timings;
 133                 found = 1;
 134         }
 135 #endif
 136         if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
 137                                 &t.pixel_clock,
 138                                 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
 139                                 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
 140                 return -EINVAL;
 141
 142         r = dssdev->driver->check_timings(dssdev, &t);
 143         if (r)
 144                 return r;
 145
 146         dssdev->driver->set_timings(dssdev, &t);
 147
 148         return size;
 149 }
 150
 151 static ssize_t display_rotate_show(struct device *dev,
 152                 struct device_attribute *attr, char *buf)
 153 {
 154         struct omap_dss_device *dssdev = to_dss_device(dev);
 155         int rotate;
 156         if (!dssdev->driver->get_rotate)
 157                 return -ENOENT;
 158         rotate = dssdev->driver->get_rotate(dssdev);
 159         return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
 160 }
 161
 162 static ssize_t display_rotate_store(struct device *dev,
 163                 struct device_attribute *attr, const char *buf, size_t size)
 164 {
 165         struct omap_dss_device *dssdev = to_dss_device(dev);
 166         int rot, r;
 167
 168         if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
 169                 return -ENOENT;
 170
 171         r = kstrtoint(buf, 0, &rot);
 172         if (r)
 173                 return r;
 174
 175         r = dssdev->driver->set_rotate(dssdev, rot);
 176         if (r)
 177                 return r;
 178
 179         return size;
 180 }
 181
 182 static ssize_t display_mirror_show(struct device *dev,
 183                 struct device_attribute *attr, char *buf)
 184 {
 185         struct omap_dss_device *dssdev = to_dss_device(dev);
 186         int mirror;
 187         if (!dssdev->driver->get_mirror)
 188                 return -ENOENT;
 189         mirror = dssdev->driver->get_mirror(dssdev);
 190         return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
 191 }
 192
 193 static ssize_t display_mirror_store(struct device *dev,
 194                 struct device_attribute *attr, const char *buf, size_t size)
 195 {
 196         struct omap_dss_device *dssdev = to_dss_device(dev);
 197         int mirror, r;
 198
 199         if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
 200                 return -ENOENT;
 201
 202         r = kstrtoint(buf, 0, &mirror);
 203         if (r)
 204                 return r;
 205
 206         mirror = !!mirror;
 207
 208         r = dssdev->driver->set_mirror(dssdev, mirror);
 209         if (r)
 210                 return r;
 211
 212         return size;
 213 }
 214
 215 static ssize_t display_wss_show(struct device *dev,
 216                 struct device_attribute *attr, char *buf)
 217 {
 218         struct omap_dss_device *dssdev = to_dss_device(dev);
 219         unsigned int wss;
 220
 221         if (!dssdev->driver->get_wss)
 222                 return -ENOENT;
 223
 224         wss = dssdev->driver->get_wss(dssdev);
 225
 226         return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
 227 }
 228
 229 static ssize_t display_wss_store(struct device *dev,
 230                 struct device_attribute *attr, const char *buf, size_t size)
 231 {
 232         struct omap_dss_device *dssdev = to_dss_device(dev);
 233         u32 wss;
 234         int r;
 235
 236         if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
 237                 return -ENOENT;
 238
 239         r = kstrtou32(buf, 0, &wss);
 240         if (r)
 241                 return r;
 242
 243         if (wss > 0xfffff)
 244                 return -EINVAL;
 245
 246         r = dssdev->driver->set_wss(dssdev, wss);
 247         if (r)
 248                 return r;
 249
 250         return size;
 251 }
 252
 253 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
 254                 display_enabled_show, display_enabled_store);
 255 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
 256                 display_tear_show, display_tear_store);
 257 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
 258                 display_timings_show, display_timings_store);
 259 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
 260                 display_rotate_show, display_rotate_store);
 261 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
 262                 display_mirror_show, display_mirror_store);
 263 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
 264                 display_wss_show, display_wss_store);
 265
 266 static struct device_attribute *display_sysfs_attrs[] = {
 267         &dev_attr_enabled,
 268         &dev_attr_tear_elim,
 269         &dev_attr_timings,
 270         &dev_attr_rotate,
 271         &dev_attr_mirror,
 272         &dev_attr_wss,
 273         NULL
 274 };
 275
 276 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
 277                         u16 *xres, u16 *yres)
 278 {
 279         *xres = dssdev->panel.timings.x_res;
 280         *yres = dssdev->panel.timings.y_res;
 281 }
 282 EXPORT_SYMBOL(omapdss_default_get_resolution);
 283
 284 void default_get_overlay_fifo_thresholds(enum omap_plane plane,
 285                 u32 fifo_size, enum omap_burst_size *burst_size,
 286                 u32 *fifo_low, u32 *fifo_high)
 287 {
 288         unsigned burst_size_bytes;
 289
 290         *burst_size = OMAP_DSS_BURST_16x32;
 291         burst_size_bytes = 16 * 32 / 8;
 292
 293         *fifo_high = fifo_size - 1;
 294         *fifo_low = fifo_size - burst_size_bytes;
 295 }
 296
 297 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
 298 {
 299         switch (dssdev->type) {
 300         case OMAP_DISPLAY_TYPE_DPI:
 301                 if (dssdev->phy.dpi.data_lines == 24)
 302                         return 24;
 303                 else
 304                         return 16;
 305
 306         case OMAP_DISPLAY_TYPE_DBI:
 307         case OMAP_DISPLAY_TYPE_DSI:
 308                 if (dssdev->ctrl.pixel_size == 24)
 309                         return 24;
 310                 else
 311                         return 16;
 312         case OMAP_DISPLAY_TYPE_VENC:
 313         case OMAP_DISPLAY_TYPE_SDI:
 314         case OMAP_DISPLAY_TYPE_HDMI:
 315                 return 24;
 316         default:
 317                 BUG();
 318         }
 319 }
 320 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
 321
 322 /* Checks if replication logic should be used. Only use for active matrix,
 323  * when overlay is in RGB12U or RGB16 mode, and LCD interface is
 324  * 18bpp or 24bpp */
 325 bool dss_use_replication(struct omap_dss_device *dssdev,
 326                 enum omap_color_mode mode)
 327 {
 328         int bpp;
 329
 330         if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
 331                 return false;
 332
 333         if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
 334                         (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
 335                 return false;
 336
 337         switch (dssdev->type) {
 338         case OMAP_DISPLAY_TYPE_DPI:
 339                 bpp = dssdev->phy.dpi.data_lines;
 340                 break;
 341         case OMAP_DISPLAY_TYPE_HDMI:
 342         case OMAP_DISPLAY_TYPE_VENC:
 343         case OMAP_DISPLAY_TYPE_SDI:
 344                 bpp = 24;
 345                 break;
 346         case OMAP_DISPLAY_TYPE_DBI:
 347         case OMAP_DISPLAY_TYPE_DSI:
 348                 bpp = dssdev->ctrl.pixel_size;
 349                 break;
 350         default:
 351                 BUG();
 352         }
 353
 354         return bpp > 16;
 355 }
 356
 357 void dss_init_device(struct platform_device *pdev,
 358                 struct omap_dss_device *dssdev)
 359 {
 360         struct device_attribute *attr;
 361         int i;
 362         int r;
 363
 364         switch (dssdev->type) {
 365 #ifdef CONFIG_OMAP2_DSS_DPI
 366         case OMAP_DISPLAY_TYPE_DPI:
 367                 r = dpi_init_display(dssdev);
 368                 break;
 369 #endif
 370 #ifdef CONFIG_OMAP2_DSS_RFBI
 371         case OMAP_DISPLAY_TYPE_DBI:
 372                 r = rfbi_init_display(dssdev);
 373                 break;
 374 #endif
 375 #ifdef CONFIG_OMAP2_DSS_VENC
 376         case OMAP_DISPLAY_TYPE_VENC:
 377                 r = venc_init_display(dssdev);
 378                 break;
 379 #endif
 380 #ifdef CONFIG_OMAP2_DSS_SDI
 381         case OMAP_DISPLAY_TYPE_SDI:
 382                 r = sdi_init_display(dssdev);
 383                 break;
 384 #endif
 385 #ifdef CONFIG_OMAP2_DSS_DSI
 386         case OMAP_DISPLAY_TYPE_DSI:
 387                 r = dsi_init_display(dssdev);
 388                 break;
 389 #endif
 390         case OMAP_DISPLAY_TYPE_HDMI:
 391                 r = hdmi_init_display(dssdev);
 392                 break;
 393         default:
 394                 DSSERR("Support for display '%s' not compiled in.\n",
 395                                 dssdev->name);
 396                 return;
 397         }
 398
 399         if (r) {
 400                 DSSERR("failed to init display %s\n", dssdev->name);
 401                 return;
 402         }
 403
 404         /* create device sysfs files */
 405         i = 0;
 406         while ((attr = display_sysfs_attrs[i++]) != NULL) {
 407                 r = device_create_file(&dssdev->dev, attr);
 408                 if (r)
 409                         DSSERR("failed to create sysfs file\n");
 410         }
 411
 412         /* create display? sysfs links */
 413         r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
 414                         dev_name(&dssdev->dev));
 415         if (r)
 416                 DSSERR("failed to create sysfs display link\n");
 417 }
 418
 419 void dss_uninit_device(struct platform_device *pdev,
 420                 struct omap_dss_device *dssdev)
 421 {
 422         struct device_attribute *attr;
 423         int i = 0;
 424
 425         sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
 426
 427         while ((attr = display_sysfs_attrs[i++]) != NULL)
 428                 device_remove_file(&dssdev->dev, attr);
 429
 430         if (dssdev->manager)
 431                 dssdev->manager->unset_device(dssdev->manager);
 432 }
 433
 434 static int dss_suspend_device(struct device *dev, void *data)
 435 {
 436         int r;
 437         struct omap_dss_device *dssdev = to_dss_device(dev);
 438
 439         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
 440                 dssdev->activate_after_resume = false;
 441                 return 0;
 442         }
 443
 444         if (!dssdev->driver->suspend) {
 445                 DSSERR("display '%s' doesn't implement suspend\n",
 446                                 dssdev->name);
 447                 return -ENOSYS;
 448         }
 449
 450         r = dssdev->driver->suspend(dssdev);
 451         if (r)
 452                 return r;
 453
 454         dssdev->activate_after_resume = true;
 455
 456         return 0;
 457 }
 458
 459 int dss_suspend_all_devices(void)
 460 {
 461         int r;
 462         struct bus_type *bus = dss_get_bus();
 463
 464         r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
 465         if (r) {
 466                 /* resume all displays that were suspended */
 467                 dss_resume_all_devices();
 468                 return r;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static int dss_resume_device(struct device *dev, void *data)
 475 {
 476         int r;
 477         struct omap_dss_device *dssdev = to_dss_device(dev);
 478
 479         if (dssdev->activate_after_resume && dssdev->driver->resume) {
 480                 r = dssdev->driver->resume(dssdev);
 481                 if (r)
 482                         return r;
 483         }
 484
 485         dssdev->activate_after_resume = false;
 486
 487         return 0;
 488 }
 489
 490 int dss_resume_all_devices(void)
 491 {
 492         struct bus_type *bus = dss_get_bus();
 493
 494         return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
 495 }
 496
 497 static int dss_disable_device(struct device *dev, void *data)
 498 {
 499         struct omap_dss_device *dssdev = to_dss_device(dev);
 500
 501         if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
 502                 dssdev->driver->disable(dssdev);
 503
 504         return 0;
 505 }
 506
 507 void dss_disable_all_devices(void)
 508 {
 509         struct bus_type *bus = dss_get_bus();
 510         bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
 511 }
 512
 513
 514 void omap_dss_get_device(struct omap_dss_device *dssdev)
 515 {
 516         get_device(&dssdev->dev);
 517 }
 518 EXPORT_SYMBOL(omap_dss_get_device);
 519
 520 void omap_dss_put_device(struct omap_dss_device *dssdev)
 521 {
 522         put_device(&dssdev->dev);
 523 }
 524 EXPORT_SYMBOL(omap_dss_put_device);
 525
 526 /* ref count of the found device is incremented. ref count
 527  * of from-device is decremented. */
 528 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
 529 {
 530         struct device *dev;
 531         struct device *dev_start = NULL;
 532         struct omap_dss_device *dssdev = NULL;
 533
 534         int match(struct device *dev, void *data)
 535         {
 536                 return 1;
 537         }
 538
 539         if (from)
 540                 dev_start = &from->dev;
 541         dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
 542         if (dev)
 543                 dssdev = to_dss_device(dev);
 544         if (from)
 545                 put_device(&from->dev);
 546
 547         return dssdev;
 548 }
 549 EXPORT_SYMBOL(omap_dss_get_next_device);
 550
 551 struct omap_dss_device *omap_dss_find_device(void *data,
 552                 int (*match)(struct omap_dss_device *dssdev, void *data))
 553 {
 554         struct omap_dss_device *dssdev = NULL;
 555
 556         while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
 557                 if (match(dssdev, data))
 558                         return dssdev;
 559         }
 560
 561         return NULL;
 562 }
 563 EXPORT_SYMBOL(omap_dss_find_device);
 564
 565 int omap_dss_start_device(struct omap_dss_device *dssdev)
 566 {
 567         if (!dssdev->driver) {
 568                 DSSDBG("no driver\n");
 569                 return -ENODEV;
 570         }
 571
 572         if (!try_module_get(dssdev->dev.driver->owner)) {
 573                 return -ENODEV;
 574         }
 575
 576         return 0;
 577 }
 578 EXPORT_SYMBOL(omap_dss_start_device);
 579
 580 void omap_dss_stop_device(struct omap_dss_device *dssdev)
 581 {
 582         module_put(dssdev->dev.driver->owner);
 583 }
 584 EXPORT_SYMBOL(omap_dss_stop_device);
 585