drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
   4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/
   5  * Authors: Yong Zhi
   6  *      Mythri pk <mythripk@ti.com>
   7  */
   8
   9 #define DSS_SUBSYS_NAME "HDMI"
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/err.h>
  14 #include <linux/io.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/mutex.h>
  17 #include <linux/delay.h>
  18 #include <linux/string.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/clk.h>
  22 #include <linux/of.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/component.h>
  25 #include <video/omapfb_dss.h>
  26 #include <sound/omap-hdmi-audio.h>
  27
  28 #include "hdmi4_core.h"
  29 #include "dss.h"
  30 #include "dss_features.h"
  31 #include "hdmi.h"
  32
  33 static struct omap_hdmi hdmi;
  34
  35 static int hdmi_runtime_get(void)
  36 {
  37         int r;
  38
  39         DSSDBG("hdmi_runtime_get\n");
  40
  41         r = pm_runtime_get_sync(&hdmi.pdev->dev);
  42         if (WARN_ON(r < 0)) {
  43                 pm_runtime_put_sync(&hdmi.pdev->dev);
  44                 return r;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static void hdmi_runtime_put(void)
  51 {
  52         int r;
  53
  54         DSSDBG("hdmi_runtime_put\n");
  55
  56         r = pm_runtime_put_sync(&hdmi.pdev->dev);
  57         WARN_ON(r < 0 && r != -ENOSYS);
  58 }
  59
  60 static irqreturn_t hdmi_irq_handler(int irq, void *data)
  61 {
  62         struct hdmi_wp_data *wp = data;
  63         u32 irqstatus;
  64
  65         irqstatus = hdmi_wp_get_irqstatus(wp);
  66         hdmi_wp_set_irqstatus(wp, irqstatus);
  67
  68         if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
  69                         irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
  70                 /*
  71                  * If we get both connect and disconnect interrupts at the same
  72                  * time, turn off the PHY, clear interrupts, and restart, which
  73                  * raises connect interrupt if a cable is connected, or nothing
  74                  * if cable is not connected.
  75                  */
  76                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
  77
  78                 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
  79                                 HDMI_IRQ_LINK_DISCONNECT);
  80
  81                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
  82         } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
  83                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
  84         } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
  85                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
  86         }
  87
  88         return IRQ_HANDLED;
  89 }
  90
  91 static int hdmi_init_regulator(void)
  92 {
  93         struct regulator *reg;
  94
  95         if (hdmi.vdda_reg != NULL)
  96                 return 0;
  97
  98         reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
  99
 100         if (IS_ERR(reg)) {
 101                 if (PTR_ERR(reg) != -EPROBE_DEFER)
 102                         DSSERR("can't get VDDA regulator\n");
 103                 return PTR_ERR(reg);
 104         }
 105
 106         hdmi.vdda_reg = reg;
 107
 108         return 0;
 109 }
 110
 111 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
 112 {
 113         int r;
 114
 115         r = regulator_enable(hdmi.vdda_reg);
 116         if (r)
 117                 return r;
 118
 119         r = hdmi_runtime_get();
 120         if (r)
 121                 goto err_runtime_get;
 122
 123         /* Make selection of HDMI in DSS */
 124         dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
 125
 126         hdmi.core_enabled = true;
 127
 128         return 0;
 129
 130 err_runtime_get:
 131         regulator_disable(hdmi.vdda_reg);
 132
 133         return r;
 134 }
 135
 136 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
 137 {
 138         hdmi.core_enabled = false;
 139
 140         hdmi_runtime_put();
 141         regulator_disable(hdmi.vdda_reg);
 142 }
 143
 144 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 145 {
 146         int r;
 147         struct omap_video_timings *p;
 148         struct omap_overlay_manager *mgr = hdmi.output.manager;
 149         struct hdmi_wp_data *wp = &hdmi.wp;
 150         struct dss_pll_clock_info hdmi_cinfo = { 0 };
 151
 152         r = hdmi_power_on_core(dssdev);
 153         if (r)
 154                 return r;
 155
 156         /* disable and clear irqs */
 157         hdmi_wp_clear_irqenable(wp, 0xffffffff);
 158         hdmi_wp_set_irqstatus(wp, 0xffffffff);
 159
 160         p = &hdmi.cfg.timings;
 161
 162         DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
 163
 164         hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
 165
 166         r = dss_pll_enable(&hdmi.pll.pll);
 167         if (r) {
 168                 DSSERR("Failed to enable PLL\n");
 169                 goto err_pll_enable;
 170         }
 171
 172         r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
 173         if (r) {
 174                 DSSERR("Failed to configure PLL\n");
 175                 goto err_pll_cfg;
 176         }
 177
 178         r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
 179                 hdmi_cinfo.clkout[0]);
 180         if (r) {
 181                 DSSDBG("Failed to configure PHY\n");
 182                 goto err_phy_cfg;
 183         }
 184
 185         r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
 186         if (r)
 187                 goto err_phy_pwr;
 188
 189         hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
 190
 191         /* bypass TV gamma table */
 192         dispc_enable_gamma_table(0);
 193
 194         /* tv size */
 195         dss_mgr_set_timings(mgr, p);
 196
 197         r = hdmi_wp_video_start(&hdmi.wp);
 198         if (r)
 199                 goto err_vid_enable;
 200
 201         r = dss_mgr_enable(mgr);
 202         if (r)
 203                 goto err_mgr_enable;
 204
 205         hdmi_wp_set_irqenable(wp,
 206                 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
 207
 208         return 0;
 209
 210 err_mgr_enable:
 211         hdmi_wp_video_stop(&hdmi.wp);
 212 err_vid_enable:
 213         hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
 214 err_phy_pwr:
 215 err_phy_cfg:
 216 err_pll_cfg:
 217         dss_pll_disable(&hdmi.pll.pll);
 218 err_pll_enable:
 219         hdmi_power_off_core(dssdev);
 220         return -EIO;
 221 }
 222
 223 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
 224 {
 225         struct omap_overlay_manager *mgr = hdmi.output.manager;
 226
 227         hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
 228
 229         dss_mgr_disable(mgr);
 230
 231         hdmi_wp_video_stop(&hdmi.wp);
 232
 233         hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
 234
 235         dss_pll_disable(&hdmi.pll.pll);
 236
 237         hdmi_power_off_core(dssdev);
 238 }
 239
 240 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
 241                                         struct omap_video_timings *timings)
 242 {
 243         struct omap_dss_device *out = &hdmi.output;
 244
 245         if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
 246                 return -EINVAL;
 247
 248         return 0;
 249 }
 250
 251 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
 252                 struct omap_video_timings *timings)
 253 {
 254         mutex_lock(&hdmi.lock);
 255
 256         hdmi.cfg.timings = *timings;
 257
 258         dispc_set_tv_pclk(timings->pixelclock);
 259
 260         mutex_unlock(&hdmi.lock);
 261 }
 262
 263 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
 264                 struct omap_video_timings *timings)
 265 {
 266         *timings = hdmi.cfg.timings;
 267 }
 268
 269 static void hdmi_dump_regs(struct seq_file *s)
 270 {
 271         mutex_lock(&hdmi.lock);
 272
 273         if (hdmi_runtime_get()) {
 274                 mutex_unlock(&hdmi.lock);
 275                 return;
 276         }
 277
 278         hdmi_wp_dump(&hdmi.wp, s);
 279         hdmi_pll_dump(&hdmi.pll, s);
 280         hdmi_phy_dump(&hdmi.phy, s);
 281         hdmi4_core_dump(&hdmi.core, s);
 282
 283         hdmi_runtime_put();
 284         mutex_unlock(&hdmi.lock);
 285 }
 286
 287 static int read_edid(u8 *buf, int len)
 288 {
 289         int r;
 290
 291         mutex_lock(&hdmi.lock);
 292
 293         r = hdmi_runtime_get();
 294         BUG_ON(r);
 295
 296         r = hdmi4_read_edid(&hdmi.core,  buf, len);
 297
 298         hdmi_runtime_put();
 299         mutex_unlock(&hdmi.lock);
 300
 301         return r;
 302 }
 303
 304 static void hdmi_start_audio_stream(struct omap_hdmi *hd)
 305 {
 306         hdmi_wp_audio_enable(&hd->wp, true);
 307         hdmi4_audio_start(&hd->core, &hd->wp);
 308 }
 309
 310 static void hdmi_stop_audio_stream(struct omap_hdmi *hd)
 311 {
 312         hdmi4_audio_stop(&hd->core, &hd->wp);
 313         hdmi_wp_audio_enable(&hd->wp, false);
 314 }
 315
 316 static int hdmi_display_enable(struct omap_dss_device *dssdev)
 317 {
 318         struct omap_dss_device *out = &hdmi.output;
 319         unsigned long flags;
 320         int r = 0;
 321
 322         DSSDBG("ENTER hdmi_display_enable\n");
 323
 324         mutex_lock(&hdmi.lock);
 325
 326         if (out->manager == NULL) {
 327                 DSSERR("failed to enable display: no output/manager\n");
 328                 r = -ENODEV;
 329                 goto err0;
 330         }
 331
 332         r = hdmi_power_on_full(dssdev);
 333         if (r) {
 334                 DSSERR("failed to power on device\n");
 335                 goto err0;
 336         }
 337
 338         if (hdmi.audio_configured) {
 339                 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config,
 340                                        hdmi.cfg.timings.pixelclock);
 341                 if (r) {
 342                         DSSERR("Error restoring audio configuration: %d", r);
 343                         hdmi.audio_abort_cb(&hdmi.pdev->dev);
 344                         hdmi.audio_configured = false;
 345                 }
 346         }
 347
 348         spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
 349         if (hdmi.audio_configured && hdmi.audio_playing)
 350                 hdmi_start_audio_stream(&hdmi);
 351         hdmi.display_enabled = true;
 352         spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
 353
 354         mutex_unlock(&hdmi.lock);
 355         return 0;
 356
 357 err0:
 358         mutex_unlock(&hdmi.lock);
 359         return r;
 360 }
 361
 362 static void hdmi_display_disable(struct omap_dss_device *dssdev)
 363 {
 364         unsigned long flags;
 365
 366         DSSDBG("Enter hdmi_display_disable\n");
 367
 368         mutex_lock(&hdmi.lock);
 369
 370         spin_lock_irqsave(&hdmi.audio_playing_lock, flags);
 371         hdmi_stop_audio_stream(&hdmi);
 372         hdmi.display_enabled = false;
 373         spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags);
 374
 375         hdmi_power_off_full(dssdev);
 376
 377         mutex_unlock(&hdmi.lock);
 378 }
 379
 380 static int hdmi_core_enable(struct omap_dss_device *dssdev)
 381 {
 382         int r = 0;
 383
 384         DSSDBG("ENTER omapdss_hdmi_core_enable\n");
 385
 386         mutex_lock(&hdmi.lock);
 387
 388         r = hdmi_power_on_core(dssdev);
 389         if (r) {
 390                 DSSERR("failed to power on device\n");
 391                 goto err0;
 392         }
 393
 394         mutex_unlock(&hdmi.lock);
 395         return 0;
 396
 397 err0:
 398         mutex_unlock(&hdmi.lock);
 399         return r;
 400 }
 401
 402 static void hdmi_core_disable(struct omap_dss_device *dssdev)
 403 {
 404         DSSDBG("Enter omapdss_hdmi_core_disable\n");
 405
 406         mutex_lock(&hdmi.lock);
 407
 408         hdmi_power_off_core(dssdev);
 409
 410         mutex_unlock(&hdmi.lock);
 411 }
 412
 413 static int hdmi_connect(struct omap_dss_device *dssdev,
 414                 struct omap_dss_device *dst)
 415 {
 416         struct omap_overlay_manager *mgr;
 417         int r;
 418
 419         r = hdmi_init_regulator();
 420         if (r)
 421                 return r;
 422
 423         mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
 424         if (!mgr)
 425                 return -ENODEV;
 426
 427         r = dss_mgr_connect(mgr, dssdev);
 428         if (r)
 429                 return r;
 430
 431         r = omapdss_output_set_device(dssdev, dst);
 432         if (r) {
 433                 DSSERR("failed to connect output to new device: %s\n",
 434                                 dst->name);
 435                 dss_mgr_disconnect(mgr, dssdev);
 436                 return r;
 437         }
 438
 439         return 0;
 440 }
 441
 442 static void hdmi_disconnect(struct omap_dss_device *dssdev,
 443                 struct omap_dss_device *dst)
 444 {
 445         WARN_ON(dst != dssdev->dst);
 446
 447         if (dst != dssdev->dst)
 448                 return;
 449
 450         omapdss_output_unset_device(dssdev);
 451
 452         if (dssdev->manager)
 453                 dss_mgr_disconnect(dssdev->manager, dssdev);
 454 }
 455
 456 static int hdmi_read_edid(struct omap_dss_device *dssdev,
 457                 u8 *edid, int len)
 458 {
 459         bool need_enable = !hdmi.core_enabled;
 460         int r;
 461
 462         if (need_enable) {
 463                 r = hdmi_core_enable(dssdev);
 464                 if (r)
 465                         return r;
 466         }
 467
 468         r = read_edid(edid, len);
 469
 470         if (need_enable)
 471                 hdmi_core_disable(dssdev);
 472
 473         return r;
 474 }
 475
 476 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
 477                 const struct hdmi_avi_infoframe *avi)
 478 {
 479         hdmi.cfg.infoframe = *avi;
 480         return 0;
 481 }
 482
 483 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
 484                 bool hdmi_mode)
 485 {
 486         hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
 487         return 0;
 488 }
 489
 490 static const struct omapdss_hdmi_ops hdmi_ops = {
 491         .connect                = hdmi_connect,
 492         .disconnect             = hdmi_disconnect,
 493
 494         .enable                 = hdmi_display_enable,
 495         .disable                = hdmi_display_disable,
 496
 497         .check_timings          = hdmi_display_check_timing,
 498         .set_timings            = hdmi_display_set_timing,
 499         .get_timings            = hdmi_display_get_timings,
 500
 501         .read_edid              = hdmi_read_edid,
 502         .set_infoframe          = hdmi_set_infoframe,
 503         .set_hdmi_mode          = hdmi_set_hdmi_mode,
 504 };
 505
 506 static void hdmi_init_output(struct platform_device *pdev)
 507 {
 508         struct omap_dss_device *out = &hdmi.output;
 509
 510         out->dev = &pdev->dev;
 511         out->id = OMAP_DSS_OUTPUT_HDMI;
 512         out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 513         out->name = "hdmi.0";
 514         out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 515         out->ops.hdmi = &hdmi_ops;
 516         out->owner = THIS_MODULE;
 517
 518         omapdss_register_output(out);
 519 }
 520
 521 static void hdmi_uninit_output(struct platform_device *pdev)
 522 {
 523         struct omap_dss_device *out = &hdmi.output;
 524
 525         omapdss_unregister_output(out);
 526 }
 527
 528 static int hdmi_probe_of(struct platform_device *pdev)
 529 {
 530         struct device_node *node = pdev->dev.of_node;
 531         struct device_node *ep;
 532         int r;
 533
 534         ep = omapdss_of_get_first_endpoint(node);
 535         if (!ep)
 536                 return 0;
 537
 538         r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
 539         if (r)
 540                 goto err;
 541
 542         of_node_put(ep);
 543         return 0;
 544
 545 err:
 546         of_node_put(ep);
 547         return r;
 548 }
 549
 550 /* Audio callbacks */
 551 static int hdmi_audio_startup(struct device *dev,
 552                               void (*abort_cb)(struct device *dev))
 553 {
 554         struct omap_hdmi *hd = dev_get_drvdata(dev);
 555         int ret = 0;
 556
 557         mutex_lock(&hd->lock);
 558
 559         if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
 560                 ret = -EPERM;
 561                 goto out;
 562         }
 563
 564         hd->audio_abort_cb = abort_cb;
 565
 566 out:
 567         mutex_unlock(&hd->lock);
 568
 569         return ret;
 570 }
 571
 572 static int hdmi_audio_shutdown(struct device *dev)
 573 {
 574         struct omap_hdmi *hd = dev_get_drvdata(dev);
 575
 576         mutex_lock(&hd->lock);
 577         hd->audio_abort_cb = NULL;
 578         hd->audio_configured = false;
 579         hd->audio_playing = false;
 580         mutex_unlock(&hd->lock);
 581
 582         return 0;
 583 }
 584
 585 static int hdmi_audio_start(struct device *dev)
 586 {
 587         struct omap_hdmi *hd = dev_get_drvdata(dev);
 588         unsigned long flags;
 589
 590         WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
 591
 592         spin_lock_irqsave(&hd->audio_playing_lock, flags);
 593
 594         if (hd->display_enabled)
 595                 hdmi_start_audio_stream(hd);
 596         hd->audio_playing = true;
 597
 598         spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
 599         return 0;
 600 }
 601
 602 static void hdmi_audio_stop(struct device *dev)
 603 {
 604         struct omap_hdmi *hd = dev_get_drvdata(dev);
 605         unsigned long flags;
 606
 607         WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
 608
 609         spin_lock_irqsave(&hd->audio_playing_lock, flags);
 610
 611         if (hd->display_enabled)
 612                 hdmi_stop_audio_stream(hd);
 613         hd->audio_playing = false;
 614
 615         spin_unlock_irqrestore(&hd->audio_playing_lock, flags);
 616 }
 617
 618 static int hdmi_audio_config(struct device *dev,
 619                              struct omap_dss_audio *dss_audio)
 620 {
 621         struct omap_hdmi *hd = dev_get_drvdata(dev);
 622         int ret;
 623
 624         mutex_lock(&hd->lock);
 625
 626         if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
 627                 ret = -EPERM;
 628                 goto out;
 629         }
 630
 631         ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
 632                                  hd->cfg.timings.pixelclock);
 633         if (!ret) {
 634                 hd->audio_configured = true;
 635                 hd->audio_config = *dss_audio;
 636         }
 637 out:
 638         mutex_unlock(&hd->lock);
 639
 640         return ret;
 641 }
 642
 643 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
 644         .audio_startup = hdmi_audio_startup,
 645         .audio_shutdown = hdmi_audio_shutdown,
 646         .audio_start = hdmi_audio_start,
 647         .audio_stop = hdmi_audio_stop,
 648         .audio_config = hdmi_audio_config,
 649 };
 650
 651 static int hdmi_audio_register(struct device *dev)
 652 {
 653         struct omap_hdmi_audio_pdata pdata = {
 654                 .dev = dev,
 655                 .version = 4,
 656                 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
 657                 .ops = &hdmi_audio_ops,
 658         };
 659
 660         hdmi.audio_pdev = platform_device_register_data(
 661                 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
 662                 &pdata, sizeof(pdata));
 663
 664         return PTR_ERR_OR_ZERO(hdmi.audio_pdev);
 665 }
 666
 667 /* HDMI HW IP initialisation */
 668 static int hdmi4_bind(struct device *dev, struct device *master, void *data)
 669 {
 670         struct platform_device *pdev = to_platform_device(dev);
 671         int r;
 672         int irq;
 673
 674         hdmi.pdev = pdev;
 675         dev_set_drvdata(&pdev->dev, &hdmi);
 676
 677         mutex_init(&hdmi.lock);
 678         spin_lock_init(&hdmi.audio_playing_lock);
 679
 680         if (pdev->dev.of_node) {
 681                 r = hdmi_probe_of(pdev);
 682                 if (r)
 683                         return r;
 684         }
 685
 686         r = hdmi_wp_init(pdev, &hdmi.wp);
 687         if (r)
 688                 return r;
 689
 690         r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
 691         if (r)
 692                 return r;
 693
 694         r = hdmi_phy_init(pdev, &hdmi.phy);
 695         if (r)
 696                 goto err;
 697
 698         r = hdmi4_core_init(pdev, &hdmi.core);
 699         if (r)
 700                 goto err;
 701
 702         irq = platform_get_irq(pdev, 0);
 703         if (irq < 0) {
 704                 DSSERR("platform_get_irq failed\n");
 705                 r = -ENODEV;
 706                 goto err;
 707         }
 708
 709         r = devm_request_threaded_irq(&pdev->dev, irq,
 710                         NULL, hdmi_irq_handler,
 711                         IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
 712         if (r) {
 713                 DSSERR("HDMI IRQ request failed\n");
 714                 goto err;
 715         }
 716
 717         pm_runtime_enable(&pdev->dev);
 718
 719         hdmi_init_output(pdev);
 720
 721         r = hdmi_audio_register(&pdev->dev);
 722         if (r) {
 723                 DSSERR("Registering HDMI audio failed\n");
 724                 hdmi_uninit_output(pdev);
 725                 pm_runtime_disable(&pdev->dev);
 726                 return r;
 727         }
 728
 729         dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 730
 731         return 0;
 732 err:
 733         hdmi_pll_uninit(&hdmi.pll);
 734         return r;
 735 }
 736
 737 static void hdmi4_unbind(struct device *dev, struct device *master, void *data)
 738 {
 739         struct platform_device *pdev = to_platform_device(dev);
 740
 741         if (hdmi.audio_pdev)
 742                 platform_device_unregister(hdmi.audio_pdev);
 743
 744         hdmi_uninit_output(pdev);
 745
 746         hdmi_pll_uninit(&hdmi.pll);
 747
 748         pm_runtime_disable(&pdev->dev);
 749 }
 750
 751 static const struct component_ops hdmi4_component_ops = {
 752         .bind   = hdmi4_bind,
 753         .unbind = hdmi4_unbind,
 754 };
 755
 756 static int hdmi4_probe(struct platform_device *pdev)
 757 {
 758         return component_add(&pdev->dev, &hdmi4_component_ops);
 759 }
 760
 761 static int hdmi4_remove(struct platform_device *pdev)
 762 {
 763         component_del(&pdev->dev, &hdmi4_component_ops);
 764         return 0;
 765 }
 766
 767 static int hdmi_runtime_suspend(struct device *dev)
 768 {
 769         dispc_runtime_put();
 770
 771         return 0;
 772 }
 773
 774 static int hdmi_runtime_resume(struct device *dev)
 775 {
 776         int r;
 777
 778         r = dispc_runtime_get();
 779         if (r < 0)
 780                 return r;
 781
 782         return 0;
 783 }
 784
 785 static const struct dev_pm_ops hdmi_pm_ops = {
 786         .runtime_suspend = hdmi_runtime_suspend,
 787         .runtime_resume = hdmi_runtime_resume,
 788 };
 789
 790 static const struct of_device_id hdmi_of_match[] = {
 791         { .compatible = "ti,omap4-hdmi", },
 792         {},
 793 };
 794
 795 static struct platform_driver omapdss_hdmihw_driver = {
 796         .probe          = hdmi4_probe,
 797         .remove         = hdmi4_remove,
 798         .driver         = {
 799                 .name   = "omapdss_hdmi",
 800                 .pm     = &hdmi_pm_ops,
 801                 .of_match_table = hdmi_of_match,
 802                 .suppress_bind_attrs = true,
 803         },
 804 };
 805
 806 int __init hdmi4_init_platform_driver(void)
 807 {
 808         return platform_driver_register(&omapdss_hdmihw_driver);
 809 }
 810
 811 void hdmi4_uninit_platform_driver(void)
 812 {
 813         platform_driver_unregister(&omapdss_hdmihw_driver);
 814 }