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

   1 /*
   2  * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
   3  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
   4  * Authors: Yong Zhi
   5  *      Mythri pk <mythripk@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #define DSS_SUBSYS_NAME "HDMI"
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/err.h>
  25 #include <linux/io.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/mutex.h>
  28 #include <linux/delay.h>
  29 #include <linux/string.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/pm_runtime.h>
  32 #include <linux/clk.h>
  33 #include <linux/gpio.h>
  34 #include <linux/regulator/consumer.h>
  35 #include <video/omapdss.h>
  36 #include <sound/omap-hdmi-audio.h>
  37
  38 #include "hdmi4_core.h"
  39 #include "dss.h"
  40 #include "dss_features.h"
  41 #include "hdmi.h"
  42
  43 static struct omap_hdmi hdmi;
  44
  45 static int hdmi_runtime_get(void)
  46 {
  47         int r;
  48
  49         DSSDBG("hdmi_runtime_get\n");
  50
  51         r = pm_runtime_get_sync(&hdmi.pdev->dev);
  52         WARN_ON(r < 0);
  53         if (r < 0)
  54                 return r;
  55
  56         return 0;
  57 }
  58
  59 static void hdmi_runtime_put(void)
  60 {
  61         int r;
  62
  63         DSSDBG("hdmi_runtime_put\n");
  64
  65         r = pm_runtime_put_sync(&hdmi.pdev->dev);
  66         WARN_ON(r < 0 && r != -ENOSYS);
  67 }
  68
  69 static irqreturn_t hdmi_irq_handler(int irq, void *data)
  70 {
  71         struct hdmi_wp_data *wp = data;
  72         u32 irqstatus;
  73
  74         irqstatus = hdmi_wp_get_irqstatus(wp);
  75         hdmi_wp_set_irqstatus(wp, irqstatus);
  76
  77         if ((irqstatus & HDMI_IRQ_LINK_CONNECT) &&
  78                         irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
  79                 /*
  80                  * If we get both connect and disconnect interrupts at the same
  81                  * time, turn off the PHY, clear interrupts, and restart, which
  82                  * raises connect interrupt if a cable is connected, or nothing
  83                  * if cable is not connected.
  84                  */
  85                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF);
  86
  87                 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT |
  88                                 HDMI_IRQ_LINK_DISCONNECT);
  89
  90                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
  91         } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) {
  92                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON);
  93         } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) {
  94                 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
  95         }
  96
  97         return IRQ_HANDLED;
  98 }
  99
 100 static int hdmi_init_regulator(void)
 101 {
 102         int r;
 103         struct regulator *reg;
 104
 105         if (hdmi.vdda_reg != NULL)
 106                 return 0;
 107
 108         reg = devm_regulator_get(&hdmi.pdev->dev, "vdda");
 109
 110         if (IS_ERR(reg)) {
 111                 if (PTR_ERR(reg) != -EPROBE_DEFER)
 112                         DSSERR("can't get VDDA regulator\n");
 113                 return PTR_ERR(reg);
 114         }
 115
 116         if (regulator_can_change_voltage(reg)) {
 117                 r = regulator_set_voltage(reg, 1800000, 1800000);
 118                 if (r) {
 119                         devm_regulator_put(reg);
 120                         DSSWARN("can't set the regulator voltage\n");
 121                         return r;
 122                 }
 123         }
 124
 125         hdmi.vdda_reg = reg;
 126
 127         return 0;
 128 }
 129
 130 static int hdmi_power_on_core(struct omap_dss_device *dssdev)
 131 {
 132         int r;
 133
 134         r = regulator_enable(hdmi.vdda_reg);
 135         if (r)
 136                 return r;
 137
 138         r = hdmi_runtime_get();
 139         if (r)
 140                 goto err_runtime_get;
 141
 142         /* Make selection of HDMI in DSS */
 143         dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK);
 144
 145         hdmi.core_enabled = true;
 146
 147         return 0;
 148
 149 err_runtime_get:
 150         regulator_disable(hdmi.vdda_reg);
 151
 152         return r;
 153 }
 154
 155 static void hdmi_power_off_core(struct omap_dss_device *dssdev)
 156 {
 157         hdmi.core_enabled = false;
 158
 159         hdmi_runtime_put();
 160         regulator_disable(hdmi.vdda_reg);
 161 }
 162
 163 static int hdmi_power_on_full(struct omap_dss_device *dssdev)
 164 {
 165         int r;
 166         struct omap_video_timings *p;
 167         struct omap_overlay_manager *mgr = hdmi.output.manager;
 168         struct hdmi_wp_data *wp = &hdmi.wp;
 169         struct dss_pll_clock_info hdmi_cinfo = { 0 };
 170
 171         r = hdmi_power_on_core(dssdev);
 172         if (r)
 173                 return r;
 174
 175         /* disable and clear irqs */
 176         hdmi_wp_clear_irqenable(wp, 0xffffffff);
 177         hdmi_wp_set_irqstatus(wp, 0xffffffff);
 178
 179         p = &hdmi.cfg.timings;
 180
 181         DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
 182
 183         hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo);
 184
 185         r = dss_pll_enable(&hdmi.pll.pll);
 186         if (r) {
 187                 DSSERR("Failed to enable PLL\n");
 188                 goto err_pll_enable;
 189         }
 190
 191         r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo);
 192         if (r) {
 193                 DSSERR("Failed to configure PLL\n");
 194                 goto err_pll_cfg;
 195         }
 196
 197         r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco,
 198                 hdmi_cinfo.clkout[0]);
 199         if (r) {
 200                 DSSDBG("Failed to configure PHY\n");
 201                 goto err_phy_cfg;
 202         }
 203
 204         r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON);
 205         if (r)
 206                 goto err_phy_pwr;
 207
 208         hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg);
 209
 210         /* bypass TV gamma table */
 211         dispc_enable_gamma_table(0);
 212
 213         /* tv size */
 214         dss_mgr_set_timings(mgr, p);
 215
 216         r = hdmi_wp_video_start(&hdmi.wp);
 217         if (r)
 218                 goto err_vid_enable;
 219
 220         r = dss_mgr_enable(mgr);
 221         if (r)
 222                 goto err_mgr_enable;
 223
 224         hdmi_wp_set_irqenable(wp,
 225                 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT);
 226
 227         return 0;
 228
 229 err_mgr_enable:
 230         hdmi_wp_video_stop(&hdmi.wp);
 231 err_vid_enable:
 232 err_phy_cfg:
 233         hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
 234 err_phy_pwr:
 235 err_pll_cfg:
 236         dss_pll_disable(&hdmi.pll.pll);
 237 err_pll_enable:
 238         hdmi_power_off_core(dssdev);
 239         return -EIO;
 240 }
 241
 242 static void hdmi_power_off_full(struct omap_dss_device *dssdev)
 243 {
 244         struct omap_overlay_manager *mgr = hdmi.output.manager;
 245
 246         hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff);
 247
 248         dss_mgr_disable(mgr);
 249
 250         hdmi_wp_video_stop(&hdmi.wp);
 251
 252         hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF);
 253
 254         dss_pll_disable(&hdmi.pll.pll);
 255
 256         hdmi_power_off_core(dssdev);
 257 }
 258
 259 static int hdmi_display_check_timing(struct omap_dss_device *dssdev,
 260                                         struct omap_video_timings *timings)
 261 {
 262         struct omap_dss_device *out = &hdmi.output;
 263
 264         if (!dispc_mgr_timings_ok(out->dispc_channel, timings))
 265                 return -EINVAL;
 266
 267         return 0;
 268 }
 269
 270 static void hdmi_display_set_timing(struct omap_dss_device *dssdev,
 271                 struct omap_video_timings *timings)
 272 {
 273         mutex_lock(&hdmi.lock);
 274
 275         hdmi.cfg.timings = *timings;
 276
 277         dispc_set_tv_pclk(timings->pixelclock);
 278
 279         mutex_unlock(&hdmi.lock);
 280 }
 281
 282 static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
 283                 struct omap_video_timings *timings)
 284 {
 285         *timings = hdmi.cfg.timings;
 286 }
 287
 288 static void hdmi_dump_regs(struct seq_file *s)
 289 {
 290         mutex_lock(&hdmi.lock);
 291
 292         if (hdmi_runtime_get()) {
 293                 mutex_unlock(&hdmi.lock);
 294                 return;
 295         }
 296
 297         hdmi_wp_dump(&hdmi.wp, s);
 298         hdmi_pll_dump(&hdmi.pll, s);
 299         hdmi_phy_dump(&hdmi.phy, s);
 300         hdmi4_core_dump(&hdmi.core, s);
 301
 302         hdmi_runtime_put();
 303         mutex_unlock(&hdmi.lock);
 304 }
 305
 306 static int read_edid(u8 *buf, int len)
 307 {
 308         int r;
 309
 310         mutex_lock(&hdmi.lock);
 311
 312         r = hdmi_runtime_get();
 313         BUG_ON(r);
 314
 315         r = hdmi4_read_edid(&hdmi.core,  buf, len);
 316
 317         hdmi_runtime_put();
 318         mutex_unlock(&hdmi.lock);
 319
 320         return r;
 321 }
 322
 323 static int hdmi_display_enable(struct omap_dss_device *dssdev)
 324 {
 325         struct omap_dss_device *out = &hdmi.output;
 326         int r = 0;
 327
 328         DSSDBG("ENTER hdmi_display_enable\n");
 329
 330         mutex_lock(&hdmi.lock);
 331
 332         if (out == NULL || out->manager == NULL) {
 333                 DSSERR("failed to enable display: no output/manager\n");
 334                 r = -ENODEV;
 335                 goto err0;
 336         }
 337
 338         r = hdmi_power_on_full(dssdev);
 339         if (r) {
 340                 DSSERR("failed to power on device\n");
 341                 goto err0;
 342         }
 343
 344         hdmi.display_enabled = true;
 345
 346         mutex_unlock(&hdmi.lock);
 347         return 0;
 348
 349 err0:
 350         mutex_unlock(&hdmi.lock);
 351         return r;
 352 }
 353
 354 static void hdmi_display_disable(struct omap_dss_device *dssdev)
 355 {
 356         DSSDBG("Enter hdmi_display_disable\n");
 357
 358         mutex_lock(&hdmi.lock);
 359
 360         if (hdmi.audio_pdev && hdmi.audio_abort_cb)
 361                 hdmi.audio_abort_cb(&hdmi.audio_pdev->dev);
 362
 363         hdmi_power_off_full(dssdev);
 364
 365         hdmi.display_enabled = false;
 366
 367         mutex_unlock(&hdmi.lock);
 368 }
 369
 370 static int hdmi_core_enable(struct omap_dss_device *dssdev)
 371 {
 372         int r = 0;
 373
 374         DSSDBG("ENTER omapdss_hdmi_core_enable\n");
 375
 376         mutex_lock(&hdmi.lock);
 377
 378         r = hdmi_power_on_core(dssdev);
 379         if (r) {
 380                 DSSERR("failed to power on device\n");
 381                 goto err0;
 382         }
 383
 384         mutex_unlock(&hdmi.lock);
 385         return 0;
 386
 387 err0:
 388         mutex_unlock(&hdmi.lock);
 389         return r;
 390 }
 391
 392 static void hdmi_core_disable(struct omap_dss_device *dssdev)
 393 {
 394         DSSDBG("Enter omapdss_hdmi_core_disable\n");
 395
 396         mutex_lock(&hdmi.lock);
 397
 398         hdmi_power_off_core(dssdev);
 399
 400         mutex_unlock(&hdmi.lock);
 401 }
 402
 403 static int hdmi_connect(struct omap_dss_device *dssdev,
 404                 struct omap_dss_device *dst)
 405 {
 406         struct omap_overlay_manager *mgr;
 407         int r;
 408
 409         r = hdmi_init_regulator();
 410         if (r)
 411                 return r;
 412
 413         mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel);
 414         if (!mgr)
 415                 return -ENODEV;
 416
 417         r = dss_mgr_connect(mgr, dssdev);
 418         if (r)
 419                 return r;
 420
 421         r = omapdss_output_set_device(dssdev, dst);
 422         if (r) {
 423                 DSSERR("failed to connect output to new device: %s\n",
 424                                 dst->name);
 425                 dss_mgr_disconnect(mgr, dssdev);
 426                 return r;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static void hdmi_disconnect(struct omap_dss_device *dssdev,
 433                 struct omap_dss_device *dst)
 434 {
 435         WARN_ON(dst != dssdev->dst);
 436
 437         if (dst != dssdev->dst)
 438                 return;
 439
 440         omapdss_output_unset_device(dssdev);
 441
 442         if (dssdev->manager)
 443                 dss_mgr_disconnect(dssdev->manager, dssdev);
 444 }
 445
 446 static int hdmi_read_edid(struct omap_dss_device *dssdev,
 447                 u8 *edid, int len)
 448 {
 449         bool need_enable;
 450         int r;
 451
 452         need_enable = hdmi.core_enabled == false;
 453
 454         if (need_enable) {
 455                 r = hdmi_core_enable(dssdev);
 456                 if (r)
 457                         return r;
 458         }
 459
 460         r = read_edid(edid, len);
 461
 462         if (need_enable)
 463                 hdmi_core_disable(dssdev);
 464
 465         return r;
 466 }
 467
 468 static int hdmi_set_infoframe(struct omap_dss_device *dssdev,
 469                 const struct hdmi_avi_infoframe *avi)
 470 {
 471         hdmi.cfg.infoframe = *avi;
 472         return 0;
 473 }
 474
 475 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev,
 476                 bool hdmi_mode)
 477 {
 478         hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI;
 479         return 0;
 480 }
 481
 482 static const struct omapdss_hdmi_ops hdmi_ops = {
 483         .connect                = hdmi_connect,
 484         .disconnect             = hdmi_disconnect,
 485
 486         .enable                 = hdmi_display_enable,
 487         .disable                = hdmi_display_disable,
 488
 489         .check_timings          = hdmi_display_check_timing,
 490         .set_timings            = hdmi_display_set_timing,
 491         .get_timings            = hdmi_display_get_timings,
 492
 493         .read_edid              = hdmi_read_edid,
 494         .set_infoframe          = hdmi_set_infoframe,
 495         .set_hdmi_mode          = hdmi_set_hdmi_mode,
 496 };
 497
 498 static void hdmi_init_output(struct platform_device *pdev)
 499 {
 500         struct omap_dss_device *out = &hdmi.output;
 501
 502         out->dev = &pdev->dev;
 503         out->id = OMAP_DSS_OUTPUT_HDMI;
 504         out->output_type = OMAP_DISPLAY_TYPE_HDMI;
 505         out->name = "hdmi.0";
 506         out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT;
 507         out->ops.hdmi = &hdmi_ops;
 508         out->owner = THIS_MODULE;
 509
 510         omapdss_register_output(out);
 511 }
 512
 513 static void hdmi_uninit_output(struct platform_device *pdev)
 514 {
 515         struct omap_dss_device *out = &hdmi.output;
 516
 517         omapdss_unregister_output(out);
 518 }
 519
 520 static int hdmi_probe_of(struct platform_device *pdev)
 521 {
 522         struct device_node *node = pdev->dev.of_node;
 523         struct device_node *ep;
 524         int r;
 525
 526         ep = omapdss_of_get_first_endpoint(node);
 527         if (!ep)
 528                 return 0;
 529
 530         r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy);
 531         if (r)
 532                 goto err;
 533
 534         of_node_put(ep);
 535         return 0;
 536
 537 err:
 538         of_node_put(ep);
 539         return r;
 540 }
 541
 542 /* Audio callbacks */
 543 static int hdmi_audio_startup(struct device *dev,
 544                               void (*abort_cb)(struct device *dev))
 545 {
 546         struct omap_hdmi *hd = dev_get_drvdata(dev);
 547         int ret = 0;
 548
 549         mutex_lock(&hd->lock);
 550
 551         if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
 552                 ret = -EPERM;
 553                 goto out;
 554         }
 555
 556         hd->audio_abort_cb = abort_cb;
 557
 558 out:
 559         mutex_unlock(&hd->lock);
 560
 561         return ret;
 562 }
 563
 564 static int hdmi_audio_shutdown(struct device *dev)
 565 {
 566         struct omap_hdmi *hd = dev_get_drvdata(dev);
 567
 568         mutex_lock(&hd->lock);
 569         hd->audio_abort_cb = NULL;
 570         mutex_unlock(&hd->lock);
 571
 572         return 0;
 573 }
 574
 575 static int hdmi_audio_start(struct device *dev)
 576 {
 577         struct omap_hdmi *hd = dev_get_drvdata(dev);
 578
 579         WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
 580         WARN_ON(!hd->display_enabled);
 581
 582         hdmi_wp_audio_enable(&hd->wp, true);
 583         hdmi4_audio_start(&hd->core, &hd->wp);
 584
 585         return 0;
 586 }
 587
 588 static void hdmi_audio_stop(struct device *dev)
 589 {
 590         struct omap_hdmi *hd = dev_get_drvdata(dev);
 591
 592         WARN_ON(!hdmi_mode_has_audio(&hd->cfg));
 593         WARN_ON(!hd->display_enabled);
 594
 595         hdmi4_audio_stop(&hd->core, &hd->wp);
 596         hdmi_wp_audio_enable(&hd->wp, false);
 597 }
 598
 599 static int hdmi_audio_config(struct device *dev,
 600                              struct omap_dss_audio *dss_audio)
 601 {
 602         struct omap_hdmi *hd = dev_get_drvdata(dev);
 603         int ret;
 604
 605         mutex_lock(&hd->lock);
 606
 607         if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) {
 608                 ret = -EPERM;
 609                 goto out;
 610         }
 611
 612         ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio,
 613                                  hd->cfg.timings.pixelclock);
 614
 615 out:
 616         mutex_unlock(&hd->lock);
 617
 618         return ret;
 619 }
 620
 621 static const struct omap_hdmi_audio_ops hdmi_audio_ops = {
 622         .audio_startup = hdmi_audio_startup,
 623         .audio_shutdown = hdmi_audio_shutdown,
 624         .audio_start = hdmi_audio_start,
 625         .audio_stop = hdmi_audio_stop,
 626         .audio_config = hdmi_audio_config,
 627 };
 628
 629 static int hdmi_audio_register(struct device *dev)
 630 {
 631         struct omap_hdmi_audio_pdata pdata = {
 632                 .dev = dev,
 633                 .dss_version = omapdss_get_version(),
 634                 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp),
 635                 .ops = &hdmi_audio_ops,
 636         };
 637
 638         hdmi.audio_pdev = platform_device_register_data(
 639                 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
 640                 &pdata, sizeof(pdata));
 641
 642         if (IS_ERR(hdmi.audio_pdev))
 643                 return PTR_ERR(hdmi.audio_pdev);
 644
 645         return 0;
 646 }
 647
 648 /* HDMI HW IP initialisation */
 649 static int omapdss_hdmihw_probe(struct platform_device *pdev)
 650 {
 651         int r;
 652         int irq;
 653
 654         hdmi.pdev = pdev;
 655         dev_set_drvdata(&pdev->dev, &hdmi);
 656
 657         mutex_init(&hdmi.lock);
 658
 659         if (pdev->dev.of_node) {
 660                 r = hdmi_probe_of(pdev);
 661                 if (r)
 662                         return r;
 663         }
 664
 665         r = hdmi_wp_init(pdev, &hdmi.wp);
 666         if (r)
 667                 return r;
 668
 669         r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp);
 670         if (r)
 671                 return r;
 672
 673         r = hdmi_phy_init(pdev, &hdmi.phy);
 674         if (r)
 675                 goto err;
 676
 677         r = hdmi4_core_init(pdev, &hdmi.core);
 678         if (r)
 679                 goto err;
 680
 681         irq = platform_get_irq(pdev, 0);
 682         if (irq < 0) {
 683                 DSSERR("platform_get_irq failed\n");
 684                 r = -ENODEV;
 685                 goto err;
 686         }
 687
 688         r = devm_request_threaded_irq(&pdev->dev, irq,
 689                         NULL, hdmi_irq_handler,
 690                         IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp);
 691         if (r) {
 692                 DSSERR("HDMI IRQ request failed\n");
 693                 goto err;
 694         }
 695
 696         pm_runtime_enable(&pdev->dev);
 697
 698         hdmi_init_output(pdev);
 699
 700         r = hdmi_audio_register(&pdev->dev);
 701         if (r) {
 702                 DSSERR("Registering HDMI audio failed\n");
 703                 hdmi_uninit_output(pdev);
 704                 pm_runtime_disable(&pdev->dev);
 705                 return r;
 706         }
 707
 708         dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 709
 710         return 0;
 711 err:
 712         hdmi_pll_uninit(&hdmi.pll);
 713         return r;
 714 }
 715
 716 static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
 717 {
 718         if (hdmi.audio_pdev)
 719                 platform_device_unregister(hdmi.audio_pdev);
 720
 721         hdmi_uninit_output(pdev);
 722
 723         hdmi_pll_uninit(&hdmi.pll);
 724
 725         pm_runtime_disable(&pdev->dev);
 726
 727         return 0;
 728 }
 729
 730 static int hdmi_runtime_suspend(struct device *dev)
 731 {
 732         dispc_runtime_put();
 733
 734         return 0;
 735 }
 736
 737 static int hdmi_runtime_resume(struct device *dev)
 738 {
 739         int r;
 740
 741         r = dispc_runtime_get();
 742         if (r < 0)
 743                 return r;
 744
 745         return 0;
 746 }
 747
 748 static const struct dev_pm_ops hdmi_pm_ops = {
 749         .runtime_suspend = hdmi_runtime_suspend,
 750         .runtime_resume = hdmi_runtime_resume,
 751 };
 752
 753 static const struct of_device_id hdmi_of_match[] = {
 754         { .compatible = "ti,omap4-hdmi", },
 755         {},
 756 };
 757
 758 static struct platform_driver omapdss_hdmihw_driver = {
 759         .probe          = omapdss_hdmihw_probe,
 760         .remove         = __exit_p(omapdss_hdmihw_remove),
 761         .driver         = {
 762                 .name   = "omapdss_hdmi",
 763                 .pm     = &hdmi_pm_ops,
 764                 .of_match_table = hdmi_of_match,
 765                 .suppress_bind_attrs = true,
 766         },
 767 };
 768
 769 int __init hdmi4_init_platform_driver(void)
 770 {
 771         return platform_driver_register(&omapdss_hdmihw_driver);
 772 }
 773
 774 void __exit hdmi4_uninit_platform_driver(void)
 775 {
 776         platform_driver_unregister(&omapdss_hdmihw_driver);
 777 }