drivers/video/omap2/dss/overlay.c

   1 /*
   2  * linux/drivers/video/omap2/dss/overlay.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 "OVERLAY"
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/err.h>
  28 #include <linux/sysfs.h>
  29 #include <linux/kobject.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/delay.h>
  32
  33 #include <plat/display.h>
  34 #include <plat/cpu.h>
  35
  36 #include "dss.h"
  37
  38 static int num_overlays;
  39 static struct list_head overlay_list;
  40
  41 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
  42 {
  43         return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
  44 }
  45
  46 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
  47 {
  48         return snprintf(buf, PAGE_SIZE, "%s\n",
  49                         ovl->manager ? ovl->manager->name : "<none>");
  50 }
  51
  52 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
  53                 size_t size)
  54 {
  55         int i, r;
  56         struct omap_overlay_manager *mgr = NULL;
  57         struct omap_overlay_manager *old_mgr;
  58         int len = size;
  59
  60         if (buf[size-1] == '\n')
  61                 --len;
  62
  63         if (len > 0) {
  64                 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
  65                         mgr = omap_dss_get_overlay_manager(i);
  66
  67                         if (strncmp(buf, mgr->name, len) == 0)
  68                                 break;
  69
  70                         mgr = NULL;
  71                 }
  72         }
  73
  74         if (len > 0 && mgr == NULL)
  75                 return -EINVAL;
  76
  77         if (mgr)
  78                 DSSDBG("manager %s found\n", mgr->name);
  79
  80         if (mgr == ovl->manager)
  81                 return size;
  82
  83         old_mgr = ovl->manager;
  84
  85         /* detach old manager */
  86         if (old_mgr) {
  87                 r = ovl->unset_manager(ovl);
  88                 if (r) {
  89                         DSSERR("detach failed\n");
  90                         return r;
  91                 }
  92
  93                 r = old_mgr->apply(old_mgr);
  94                 if (r)
  95                         return r;
  96         }
  97
  98         if (mgr) {
  99                 r = ovl->set_manager(ovl, mgr);
 100                 if (r) {
 101                         DSSERR("Failed to attach overlay\n");
 102                         return r;
 103                 }
 104
 105                 r = mgr->apply(mgr);
 106                 if (r)
 107                         return r;
 108         }
 109
 110         return size;
 111 }
 112
 113 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
 114 {
 115         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 116                         ovl->info.width, ovl->info.height);
 117 }
 118
 119 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
 120 {
 121         return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
 122 }
 123
 124 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
 125 {
 126         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 127                         ovl->info.pos_x, ovl->info.pos_y);
 128 }
 129
 130 static ssize_t overlay_position_store(struct omap_overlay *ovl,
 131                 const char *buf, size_t size)
 132 {
 133         int r;
 134         char *last;
 135         struct omap_overlay_info info;
 136
 137         ovl->get_overlay_info(ovl, &info);
 138
 139         info.pos_x = simple_strtoul(buf, &last, 10);
 140         ++last;
 141         if (last - buf >= size)
 142                 return -EINVAL;
 143
 144         info.pos_y = simple_strtoul(last, &last, 10);
 145
 146         r = ovl->set_overlay_info(ovl, &info);
 147         if (r)
 148                 return r;
 149
 150         if (ovl->manager) {
 151                 r = ovl->manager->apply(ovl->manager);
 152                 if (r)
 153                         return r;
 154         }
 155
 156         return size;
 157 }
 158
 159 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
 160 {
 161         return snprintf(buf, PAGE_SIZE, "%d,%d\n",
 162                         ovl->info.out_width, ovl->info.out_height);
 163 }
 164
 165 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
 166                 const char *buf, size_t size)
 167 {
 168         int r;
 169         char *last;
 170         struct omap_overlay_info info;
 171
 172         ovl->get_overlay_info(ovl, &info);
 173
 174         info.out_width = simple_strtoul(buf, &last, 10);
 175         ++last;
 176         if (last - buf >= size)
 177                 return -EINVAL;
 178
 179         info.out_height = simple_strtoul(last, &last, 10);
 180
 181         r = ovl->set_overlay_info(ovl, &info);
 182         if (r)
 183                 return r;
 184
 185         if (ovl->manager) {
 186                 r = ovl->manager->apply(ovl->manager);
 187                 if (r)
 188                         return r;
 189         }
 190
 191         return size;
 192 }
 193
 194 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
 195 {
 196         return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
 197 }
 198
 199 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
 200                 size_t size)
 201 {
 202         int r;
 203         struct omap_overlay_info info;
 204
 205         ovl->get_overlay_info(ovl, &info);
 206
 207         info.enabled = simple_strtoul(buf, NULL, 10);
 208
 209         r = ovl->set_overlay_info(ovl, &info);
 210         if (r)
 211                 return r;
 212
 213         if (ovl->manager) {
 214                 r = ovl->manager->apply(ovl->manager);
 215                 if (r)
 216                         return r;
 217         }
 218
 219         return size;
 220 }
 221
 222 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
 223 {
 224         return snprintf(buf, PAGE_SIZE, "%d\n",
 225                         ovl->info.global_alpha);
 226 }
 227
 228 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
 229                 const char *buf, size_t size)
 230 {
 231         int r;
 232         struct omap_overlay_info info;
 233
 234         ovl->get_overlay_info(ovl, &info);
 235
 236         /* Video1 plane does not support global alpha
 237          * to always make it 255 completely opaque
 238          */
 239         if (ovl->id == OMAP_DSS_VIDEO1)
 240                 info.global_alpha = 255;
 241         else
 242                 info.global_alpha = simple_strtoul(buf, NULL, 10);
 243
 244         r = ovl->set_overlay_info(ovl, &info);
 245         if (r)
 246                 return r;
 247
 248         if (ovl->manager) {
 249                 r = ovl->manager->apply(ovl->manager);
 250                 if (r)
 251                         return r;
 252         }
 253
 254         return size;
 255 }
 256
 257 struct overlay_attribute {
 258         struct attribute attr;
 259         ssize_t (*show)(struct omap_overlay *, char *);
 260         ssize_t (*store)(struct omap_overlay *, const char *, size_t);
 261 };
 262
 263 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
 264         struct overlay_attribute overlay_attr_##_name = \
 265         __ATTR(_name, _mode, _show, _store)
 266
 267 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
 268 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
 269                 overlay_manager_show, overlay_manager_store);
 270 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
 271 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
 272 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
 273                 overlay_position_show, overlay_position_store);
 274 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
 275                 overlay_output_size_show, overlay_output_size_store);
 276 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
 277                 overlay_enabled_show, overlay_enabled_store);
 278 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
 279                 overlay_global_alpha_show, overlay_global_alpha_store);
 280
 281 static struct attribute *overlay_sysfs_attrs[] = {
 282         &overlay_attr_name.attr,
 283         &overlay_attr_manager.attr,
 284         &overlay_attr_input_size.attr,
 285         &overlay_attr_screen_width.attr,
 286         &overlay_attr_position.attr,
 287         &overlay_attr_output_size.attr,
 288         &overlay_attr_enabled.attr,
 289         &overlay_attr_global_alpha.attr,
 290         NULL
 291 };
 292
 293 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
 294                 char *buf)
 295 {
 296         struct omap_overlay *overlay;
 297         struct overlay_attribute *overlay_attr;
 298
 299         overlay = container_of(kobj, struct omap_overlay, kobj);
 300         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 301
 302         if (!overlay_attr->show)
 303                 return -ENOENT;
 304
 305         return overlay_attr->show(overlay, buf);
 306 }
 307
 308 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
 309                 const char *buf, size_t size)
 310 {
 311         struct omap_overlay *overlay;
 312         struct overlay_attribute *overlay_attr;
 313
 314         overlay = container_of(kobj, struct omap_overlay, kobj);
 315         overlay_attr = container_of(attr, struct overlay_attribute, attr);
 316
 317         if (!overlay_attr->store)
 318                 return -ENOENT;
 319
 320         return overlay_attr->store(overlay, buf, size);
 321 }
 322
 323 static struct sysfs_ops overlay_sysfs_ops = {
 324         .show = overlay_attr_show,
 325         .store = overlay_attr_store,
 326 };
 327
 328 static struct kobj_type overlay_ktype = {
 329         .sysfs_ops = &overlay_sysfs_ops,
 330         .default_attrs = overlay_sysfs_attrs,
 331 };
 332
 333 /* Check if overlay parameters are compatible with display */
 334 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
 335 {
 336         struct omap_overlay_info *info;
 337         u16 outw, outh;
 338         u16 dw, dh;
 339
 340         if (!dssdev)
 341                 return 0;
 342
 343         if (!ovl->info.enabled)
 344                 return 0;
 345
 346         info = &ovl->info;
 347
 348         if (info->paddr == 0) {
 349                 DSSDBG("check_overlay failed: paddr 0\n");
 350                 return -EINVAL;
 351         }
 352
 353         dssdev->driver->get_resolution(dssdev, &dw, &dh);
 354
 355         DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
 356                         ovl->id,
 357                         info->pos_x, info->pos_y,
 358                         info->width, info->height,
 359                         info->out_width, info->out_height,
 360                         dw, dh);
 361
 362         if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 363                 outw = info->width;
 364                 outh = info->height;
 365         } else {
 366                 if (info->out_width == 0)
 367                         outw = info->width;
 368                 else
 369                         outw = info->out_width;
 370
 371                 if (info->out_height == 0)
 372                         outh = info->height;
 373                 else
 374                         outh = info->out_height;
 375         }
 376
 377         if (dw < info->pos_x + outw) {
 378                 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
 379                                 dw, info->pos_x, outw);
 380                 return -EINVAL;
 381         }
 382
 383         if (dh < info->pos_y + outh) {
 384                 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
 385                                 dh, info->pos_y, outh);
 386                 return -EINVAL;
 387         }
 388
 389         if ((ovl->supported_modes & info->color_mode) == 0) {
 390                 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
 391                 return -EINVAL;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
 398                 struct omap_overlay_info *info)
 399 {
 400         int r;
 401         struct omap_overlay_info old_info;
 402
 403         old_info = ovl->info;
 404         ovl->info = *info;
 405
 406         if (ovl->manager) {
 407                 r = dss_check_overlay(ovl, ovl->manager->device);
 408                 if (r) {
 409                         ovl->info = old_info;
 410                         return r;
 411                 }
 412         }
 413
 414         ovl->info_dirty = true;
 415
 416         return 0;
 417 }
 418
 419 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
 420                 struct omap_overlay_info *info)
 421 {
 422         *info = ovl->info;
 423 }
 424
 425 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
 426 {
 427         return dss_mgr_wait_for_go_ovl(ovl);
 428 }
 429
 430 static int omap_dss_set_manager(struct omap_overlay *ovl,
 431                 struct omap_overlay_manager *mgr)
 432 {
 433         if (!mgr)
 434                 return -EINVAL;
 435
 436         if (ovl->manager) {
 437                 DSSERR("overlay '%s' already has a manager '%s'\n",
 438                                 ovl->name, ovl->manager->name);
 439                 return -EINVAL;
 440         }
 441
 442         if (ovl->info.enabled) {
 443                 DSSERR("overlay has to be disabled to change the manager\n");
 444                 return -EINVAL;
 445         }
 446
 447         ovl->manager = mgr;
 448
 449         dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
 450         /* XXX: on manual update display, in auto update mode, a bug happens
 451          * here. When an overlay is first enabled on LCD, then it's disabled,
 452          * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
 453          * errors. Waiting before changing the channel_out fixes it. I'm
 454          * guessing that the overlay is still somehow being used for the LCD,
 455          * but I don't understand how or why. */
 456         msleep(40);
 457         dispc_set_channel_out(ovl->id, mgr->id);
 458         dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
 459
 460         return 0;
 461 }
 462
 463 static int omap_dss_unset_manager(struct omap_overlay *ovl)
 464 {
 465         int r;
 466
 467         if (!ovl->manager) {
 468                 DSSERR("failed to detach overlay: manager not set\n");
 469                 return -EINVAL;
 470         }
 471
 472         if (ovl->info.enabled) {
 473                 DSSERR("overlay has to be disabled to unset the manager\n");
 474                 return -EINVAL;
 475         }
 476
 477         r = ovl->wait_for_go(ovl);
 478         if (r)
 479                 return r;
 480
 481         ovl->manager = NULL;
 482
 483         return 0;
 484 }
 485
 486 int omap_dss_get_num_overlays(void)
 487 {
 488         return num_overlays;
 489 }
 490 EXPORT_SYMBOL(omap_dss_get_num_overlays);
 491
 492 struct omap_overlay *omap_dss_get_overlay(int num)
 493 {
 494         int i = 0;
 495         struct omap_overlay *ovl;
 496
 497         list_for_each_entry(ovl, &overlay_list, list) {
 498                 if (i++ == num)
 499                         return ovl;
 500         }
 501
 502         return NULL;
 503 }
 504 EXPORT_SYMBOL(omap_dss_get_overlay);
 505
 506 static void omap_dss_add_overlay(struct omap_overlay *overlay)
 507 {
 508         ++num_overlays;
 509         list_add_tail(&overlay->list, &overlay_list);
 510 }
 511
 512 static struct omap_overlay *dispc_overlays[3];
 513
 514 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
 515 {
 516         mgr->num_overlays = 3;
 517         mgr->overlays = dispc_overlays;
 518 }
 519
 520 #ifdef L4_EXAMPLE
 521 static struct omap_overlay *l4_overlays[1];
 522 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
 523 {
 524         mgr->num_overlays = 1;
 525         mgr->overlays = l4_overlays;
 526 }
 527 #endif
 528
 529 void dss_init_overlays(struct platform_device *pdev)
 530 {
 531         int i, r;
 532
 533         INIT_LIST_HEAD(&overlay_list);
 534
 535         num_overlays = 0;
 536
 537         for (i = 0; i < 3; ++i) {
 538                 struct omap_overlay *ovl;
 539                 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
 540
 541                 BUG_ON(ovl == NULL);
 542
 543                 switch (i) {
 544                 case 0:
 545                         ovl->name = "gfx";
 546                         ovl->id = OMAP_DSS_GFX;
 547                         ovl->supported_modes = cpu_is_omap34xx() ?
 548                                 OMAP_DSS_COLOR_GFX_OMAP3 :
 549                                 OMAP_DSS_COLOR_GFX_OMAP2;
 550                         ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
 551                         ovl->info.global_alpha = 255;
 552                         break;
 553                 case 1:
 554                         ovl->name = "vid1";
 555                         ovl->id = OMAP_DSS_VIDEO1;
 556                         ovl->supported_modes = cpu_is_omap34xx() ?
 557                                 OMAP_DSS_COLOR_VID1_OMAP3 :
 558                                 OMAP_DSS_COLOR_VID_OMAP2;
 559                         ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
 560                                 OMAP_DSS_OVL_CAP_DISPC;
 561                         ovl->info.global_alpha = 255;
 562                         break;
 563                 case 2:
 564                         ovl->name = "vid2";
 565                         ovl->id = OMAP_DSS_VIDEO2;
 566                         ovl->supported_modes = cpu_is_omap34xx() ?
 567                                 OMAP_DSS_COLOR_VID2_OMAP3 :
 568                                 OMAP_DSS_COLOR_VID_OMAP2;
 569                         ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
 570                                 OMAP_DSS_OVL_CAP_DISPC;
 571                         ovl->info.global_alpha = 255;
 572                         break;
 573                 }
 574
 575                 ovl->set_manager = &omap_dss_set_manager;
 576                 ovl->unset_manager = &omap_dss_unset_manager;
 577                 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
 578                 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
 579                 ovl->wait_for_go = &dss_ovl_wait_for_go;
 580
 581                 omap_dss_add_overlay(ovl);
 582
 583                 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
 584                                 &pdev->dev.kobj, "overlay%d", i);
 585
 586                 if (r) {
 587                         DSSERR("failed to create sysfs file\n");
 588                         continue;
 589                 }
 590
 591                 dispc_overlays[i] = ovl;
 592         }
 593
 594 #ifdef L4_EXAMPLE
 595         {
 596                 struct omap_overlay *ovl;
 597                 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
 598
 599                 BUG_ON(ovl == NULL);
 600
 601                 ovl->name = "l4";
 602                 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
 603
 604                 ovl->set_manager = &omap_dss_set_manager;
 605                 ovl->unset_manager = &omap_dss_unset_manager;
 606                 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
 607                 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
 608
 609                 omap_dss_add_overlay(ovl);
 610
 611                 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
 612                                 &pdev->dev.kobj, "overlayl4");
 613
 614                 if (r)
 615                         DSSERR("failed to create sysfs file\n");
 616
 617                 l4_overlays[0] = ovl;
 618         }
 619 #endif
 620 }
 621
 622 /* connect overlays to the new device, if not already connected. if force
 623  * selected, connect always. */
 624 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
 625 {
 626         int i;
 627         struct omap_overlay_manager *lcd_mgr;
 628         struct omap_overlay_manager *tv_mgr;
 629         struct omap_overlay_manager *mgr = NULL;
 630
 631         lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
 632         tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
 633
 634         if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
 635                 if (!lcd_mgr->device || force) {
 636                         if (lcd_mgr->device)
 637                                 lcd_mgr->unset_device(lcd_mgr);
 638                         lcd_mgr->set_device(lcd_mgr, dssdev);
 639                         mgr = lcd_mgr;
 640                 }
 641         }
 642
 643         if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
 644                 if (!tv_mgr->device || force) {
 645                         if (tv_mgr->device)
 646                                 tv_mgr->unset_device(tv_mgr);
 647                         tv_mgr->set_device(tv_mgr, dssdev);
 648                         mgr = tv_mgr;
 649                 }
 650         }
 651
 652         if (mgr) {
 653                 for (i = 0; i < 3; i++) {
 654                         struct omap_overlay *ovl;
 655                         ovl = omap_dss_get_overlay(i);
 656                         if (!ovl->manager || force) {
 657                                 if (ovl->manager)
 658                                         omap_dss_unset_manager(ovl);
 659                                 omap_dss_set_manager(ovl, mgr);
 660                         }
 661                 }
 662         }
 663 }
 664
 665 void dss_uninit_overlays(struct platform_device *pdev)
 666 {
 667         struct omap_overlay *ovl;
 668
 669         while (!list_empty(&overlay_list)) {
 670                 ovl = list_first_entry(&overlay_list,
 671                                 struct omap_overlay, list);
 672                 list_del(&ovl->list);
 673                 kobject_del(&ovl->kobj);
 674                 kobject_put(&ovl->kobj);
 675                 kfree(ovl);
 676         }
 677
 678         num_overlays = 0;
 679 }
 680