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 <linux/component.h> 36 #include <linux/of.h> 37 #include <sound/omap-hdmi-audio.h> 38 39 #include "omapdss.h" 40 #include "hdmi4_core.h" 41 #include "dss.h" 42 #include "dss_features.h" 43 #include "hdmi.h" 44 45 static struct omap_hdmi hdmi; 46 47 static int hdmi_runtime_get(void) 48 { 49 int r; 50 51 DSSDBG("hdmi_runtime_get\n"); 52 53 r = pm_runtime_get_sync(&hdmi.pdev->dev); 54 WARN_ON(r < 0); 55 if (r < 0) 56 return r; 57 58 return 0; 59 } 60 61 static void hdmi_runtime_put(void) 62 { 63 int r; 64 65 DSSDBG("hdmi_runtime_put\n"); 66 67 r = pm_runtime_put_sync(&hdmi.pdev->dev); 68 WARN_ON(r < 0 && r != -ENOSYS); 69 } 70 71 static irqreturn_t hdmi_irq_handler(int irq, void *data) 72 { 73 struct hdmi_wp_data *wp = data; 74 u32 irqstatus; 75 76 irqstatus = hdmi_wp_get_irqstatus(wp); 77 hdmi_wp_set_irqstatus(wp, irqstatus); 78 79 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) && 80 irqstatus & HDMI_IRQ_LINK_DISCONNECT) { 81 /* 82 * If we get both connect and disconnect interrupts at the same 83 * time, turn off the PHY, clear interrupts, and restart, which 84 * raises connect interrupt if a cable is connected, or nothing 85 * if cable is not connected. 86 */ 87 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF); 88 89 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT | 90 HDMI_IRQ_LINK_DISCONNECT); 91 92 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 93 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) { 94 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON); 95 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) { 96 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 97 } 98 99 return IRQ_HANDLED; 100 } 101 102 static int hdmi_init_regulator(void) 103 { 104 struct regulator *reg; 105 106 if (hdmi.vdda_reg != NULL) 107 return 0; 108 109 reg = devm_regulator_get(&hdmi.pdev->dev, "vdda"); 110 111 if (IS_ERR(reg)) { 112 if (PTR_ERR(reg) != -EPROBE_DEFER) 113 DSSERR("can't get VDDA regulator\n"); 114 return PTR_ERR(reg); 115 } 116 117 hdmi.vdda_reg = reg; 118 119 return 0; 120 } 121 122 static int hdmi_power_on_core(struct omap_dss_device *dssdev) 123 { 124 int r; 125 126 r = regulator_enable(hdmi.vdda_reg); 127 if (r) 128 return r; 129 130 r = hdmi_runtime_get(); 131 if (r) 132 goto err_runtime_get; 133 134 /* Make selection of HDMI in DSS */ 135 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK); 136 137 hdmi.core_enabled = true; 138 139 return 0; 140 141 err_runtime_get: 142 regulator_disable(hdmi.vdda_reg); 143 144 return r; 145 } 146 147 static void hdmi_power_off_core(struct omap_dss_device *dssdev) 148 { 149 hdmi.core_enabled = false; 150 151 hdmi_runtime_put(); 152 regulator_disable(hdmi.vdda_reg); 153 } 154 155 static int hdmi_power_on_full(struct omap_dss_device *dssdev) 156 { 157 int r; 158 struct videomode *vm; 159 enum omap_channel channel = dssdev->dispc_channel; 160 struct hdmi_wp_data *wp = &hdmi.wp; 161 struct dss_pll_clock_info hdmi_cinfo = { 0 }; 162 unsigned pc; 163 164 r = hdmi_power_on_core(dssdev); 165 if (r) 166 return r; 167 168 /* disable and clear irqs */ 169 hdmi_wp_clear_irqenable(wp, 0xffffffff); 170 hdmi_wp_set_irqstatus(wp, 0xffffffff); 171 172 vm = &hdmi.cfg.vm; 173 174 DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive, 175 vm->vactive); 176 177 pc = vm->pixelclock; 178 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 179 pc *= 2; 180 181 /* DSS_HDMI_TCLK is bitclk / 10 */ 182 pc *= 10; 183 184 dss_pll_calc_b(&hdmi.pll.pll, clk_get_rate(hdmi.pll.pll.clkin), 185 pc, &hdmi_cinfo); 186 187 r = dss_pll_enable(&hdmi.pll.pll); 188 if (r) { 189 DSSERR("Failed to enable PLL\n"); 190 goto err_pll_enable; 191 } 192 193 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo); 194 if (r) { 195 DSSERR("Failed to configure PLL\n"); 196 goto err_pll_cfg; 197 } 198 199 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco, 200 hdmi_cinfo.clkout[0]); 201 if (r) { 202 DSSDBG("Failed to configure PHY\n"); 203 goto err_phy_cfg; 204 } 205 206 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 207 if (r) 208 goto err_phy_pwr; 209 210 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg); 211 212 /* tv size */ 213 dss_mgr_set_timings(channel, vm); 214 215 r = dss_mgr_enable(channel); 216 if (r) 217 goto err_mgr_enable; 218 219 r = hdmi_wp_video_start(&hdmi.wp); 220 if (r) 221 goto err_vid_enable; 222 223 hdmi_wp_set_irqenable(wp, 224 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT); 225 226 return 0; 227 228 err_vid_enable: 229 dss_mgr_disable(channel); 230 err_mgr_enable: 231 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); 232 err_phy_pwr: 233 err_phy_cfg: 234 err_pll_cfg: 235 dss_pll_disable(&hdmi.pll.pll); 236 err_pll_enable: 237 hdmi_power_off_core(dssdev); 238 return -EIO; 239 } 240 241 static void hdmi_power_off_full(struct omap_dss_device *dssdev) 242 { 243 enum omap_channel channel = dssdev->dispc_channel; 244 245 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff); 246 247 hdmi_wp_video_stop(&hdmi.wp); 248 249 dss_mgr_disable(channel); 250 251 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); 252 253 dss_pll_disable(&hdmi.pll.pll); 254 255 hdmi_power_off_core(dssdev); 256 } 257 258 static int hdmi_display_check_timing(struct omap_dss_device *dssdev, 259 struct videomode *vm) 260 { 261 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, vm)) 262 return -EINVAL; 263 264 return 0; 265 } 266 267 static void hdmi_display_set_timing(struct omap_dss_device *dssdev, 268 struct videomode *vm) 269 { 270 mutex_lock(&hdmi.lock); 271 272 hdmi.cfg.vm = *vm; 273 274 dispc_set_tv_pclk(vm->pixelclock); 275 276 mutex_unlock(&hdmi.lock); 277 } 278 279 static void hdmi_display_get_timings(struct omap_dss_device *dssdev, 280 struct videomode *vm) 281 { 282 *vm = hdmi.cfg.vm; 283 } 284 285 static void hdmi_dump_regs(struct seq_file *s) 286 { 287 mutex_lock(&hdmi.lock); 288 289 if (hdmi_runtime_get()) { 290 mutex_unlock(&hdmi.lock); 291 return; 292 } 293 294 hdmi_wp_dump(&hdmi.wp, s); 295 hdmi_pll_dump(&hdmi.pll, s); 296 hdmi_phy_dump(&hdmi.phy, s); 297 hdmi4_core_dump(&hdmi.core, s); 298 299 hdmi_runtime_put(); 300 mutex_unlock(&hdmi.lock); 301 } 302 303 static int read_edid(u8 *buf, int len) 304 { 305 int r; 306 307 mutex_lock(&hdmi.lock); 308 309 r = hdmi_runtime_get(); 310 BUG_ON(r); 311 312 r = hdmi4_read_edid(&hdmi.core, buf, len); 313 314 hdmi_runtime_put(); 315 mutex_unlock(&hdmi.lock); 316 317 return r; 318 } 319 320 static void hdmi_start_audio_stream(struct omap_hdmi *hd) 321 { 322 hdmi_wp_audio_enable(&hd->wp, true); 323 hdmi4_audio_start(&hd->core, &hd->wp); 324 } 325 326 static void hdmi_stop_audio_stream(struct omap_hdmi *hd) 327 { 328 hdmi4_audio_stop(&hd->core, &hd->wp); 329 hdmi_wp_audio_enable(&hd->wp, false); 330 } 331 332 static int hdmi_display_enable(struct omap_dss_device *dssdev) 333 { 334 struct omap_dss_device *out = &hdmi.output; 335 unsigned long flags; 336 int r = 0; 337 338 DSSDBG("ENTER hdmi_display_enable\n"); 339 340 mutex_lock(&hdmi.lock); 341 342 if (!out->dispc_channel_connected) { 343 DSSERR("failed to enable display: no output/manager\n"); 344 r = -ENODEV; 345 goto err0; 346 } 347 348 r = hdmi_power_on_full(dssdev); 349 if (r) { 350 DSSERR("failed to power on device\n"); 351 goto err0; 352 } 353 354 if (hdmi.audio_configured) { 355 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config, 356 hdmi.cfg.vm.pixelclock); 357 if (r) { 358 DSSERR("Error restoring audio configuration: %d", r); 359 hdmi.audio_abort_cb(&hdmi.pdev->dev); 360 hdmi.audio_configured = false; 361 } 362 } 363 364 spin_lock_irqsave(&hdmi.audio_playing_lock, flags); 365 if (hdmi.audio_configured && hdmi.audio_playing) 366 hdmi_start_audio_stream(&hdmi); 367 hdmi.display_enabled = true; 368 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); 369 370 mutex_unlock(&hdmi.lock); 371 return 0; 372 373 err0: 374 mutex_unlock(&hdmi.lock); 375 return r; 376 } 377 378 static void hdmi_display_disable(struct omap_dss_device *dssdev) 379 { 380 unsigned long flags; 381 382 DSSDBG("Enter hdmi_display_disable\n"); 383 384 mutex_lock(&hdmi.lock); 385 386 spin_lock_irqsave(&hdmi.audio_playing_lock, flags); 387 hdmi_stop_audio_stream(&hdmi); 388 hdmi.display_enabled = false; 389 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); 390 391 hdmi_power_off_full(dssdev); 392 393 mutex_unlock(&hdmi.lock); 394 } 395 396 static int hdmi_core_enable(struct omap_dss_device *dssdev) 397 { 398 int r = 0; 399 400 DSSDBG("ENTER omapdss_hdmi_core_enable\n"); 401 402 mutex_lock(&hdmi.lock); 403 404 r = hdmi_power_on_core(dssdev); 405 if (r) { 406 DSSERR("failed to power on device\n"); 407 goto err0; 408 } 409 410 mutex_unlock(&hdmi.lock); 411 return 0; 412 413 err0: 414 mutex_unlock(&hdmi.lock); 415 return r; 416 } 417 418 static void hdmi_core_disable(struct omap_dss_device *dssdev) 419 { 420 DSSDBG("Enter omapdss_hdmi_core_disable\n"); 421 422 mutex_lock(&hdmi.lock); 423 424 hdmi_power_off_core(dssdev); 425 426 mutex_unlock(&hdmi.lock); 427 } 428 429 static int hdmi_connect(struct omap_dss_device *dssdev, 430 struct omap_dss_device *dst) 431 { 432 enum omap_channel channel = dssdev->dispc_channel; 433 int r; 434 435 r = hdmi_init_regulator(); 436 if (r) 437 return r; 438 439 r = dss_mgr_connect(channel, dssdev); 440 if (r) 441 return r; 442 443 r = omapdss_output_set_device(dssdev, dst); 444 if (r) { 445 DSSERR("failed to connect output to new device: %s\n", 446 dst->name); 447 dss_mgr_disconnect(channel, dssdev); 448 return r; 449 } 450 451 return 0; 452 } 453 454 static void hdmi_disconnect(struct omap_dss_device *dssdev, 455 struct omap_dss_device *dst) 456 { 457 enum omap_channel channel = dssdev->dispc_channel; 458 459 WARN_ON(dst != dssdev->dst); 460 461 if (dst != dssdev->dst) 462 return; 463 464 omapdss_output_unset_device(dssdev); 465 466 dss_mgr_disconnect(channel, dssdev); 467 } 468 469 static int hdmi_read_edid(struct omap_dss_device *dssdev, 470 u8 *edid, int len) 471 { 472 bool need_enable; 473 int r; 474 475 need_enable = hdmi.core_enabled == false; 476 477 if (need_enable) { 478 r = hdmi_core_enable(dssdev); 479 if (r) 480 return r; 481 } 482 483 r = read_edid(edid, len); 484 485 if (need_enable) 486 hdmi_core_disable(dssdev); 487 488 return r; 489 } 490 491 static int hdmi_set_infoframe(struct omap_dss_device *dssdev, 492 const struct hdmi_avi_infoframe *avi) 493 { 494 hdmi.cfg.infoframe = *avi; 495 return 0; 496 } 497 498 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev, 499 bool hdmi_mode) 500 { 501 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI; 502 return 0; 503 } 504 505 static const struct omapdss_hdmi_ops hdmi_ops = { 506 .connect = hdmi_connect, 507 .disconnect = hdmi_disconnect, 508 509 .enable = hdmi_display_enable, 510 .disable = hdmi_display_disable, 511 512 .check_timings = hdmi_display_check_timing, 513 .set_timings = hdmi_display_set_timing, 514 .get_timings = hdmi_display_get_timings, 515 516 .read_edid = hdmi_read_edid, 517 .set_infoframe = hdmi_set_infoframe, 518 .set_hdmi_mode = hdmi_set_hdmi_mode, 519 }; 520 521 static void hdmi_init_output(struct platform_device *pdev) 522 { 523 struct omap_dss_device *out = &hdmi.output; 524 525 out->dev = &pdev->dev; 526 out->id = OMAP_DSS_OUTPUT_HDMI; 527 out->output_type = OMAP_DISPLAY_TYPE_HDMI; 528 out->name = "hdmi.0"; 529 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT; 530 out->ops.hdmi = &hdmi_ops; 531 out->owner = THIS_MODULE; 532 533 omapdss_register_output(out); 534 } 535 536 static void hdmi_uninit_output(struct platform_device *pdev) 537 { 538 struct omap_dss_device *out = &hdmi.output; 539 540 omapdss_unregister_output(out); 541 } 542 543 static int hdmi_probe_of(struct platform_device *pdev) 544 { 545 struct device_node *node = pdev->dev.of_node; 546 struct device_node *ep; 547 int r; 548 549 ep = omapdss_of_get_first_endpoint(node); 550 if (!ep) 551 return 0; 552 553 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy); 554 if (r) 555 goto err; 556 557 of_node_put(ep); 558 return 0; 559 560 err: 561 of_node_put(ep); 562 return r; 563 } 564 565 /* Audio callbacks */ 566 static int hdmi_audio_startup(struct device *dev, 567 void (*abort_cb)(struct device *dev)) 568 { 569 struct omap_hdmi *hd = dev_get_drvdata(dev); 570 int ret = 0; 571 572 mutex_lock(&hd->lock); 573 574 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { 575 ret = -EPERM; 576 goto out; 577 } 578 579 hd->audio_abort_cb = abort_cb; 580 581 out: 582 mutex_unlock(&hd->lock); 583 584 return ret; 585 } 586 587 static int hdmi_audio_shutdown(struct device *dev) 588 { 589 struct omap_hdmi *hd = dev_get_drvdata(dev); 590 591 mutex_lock(&hd->lock); 592 hd->audio_abort_cb = NULL; 593 hd->audio_configured = false; 594 hd->audio_playing = false; 595 mutex_unlock(&hd->lock); 596 597 return 0; 598 } 599 600 static int hdmi_audio_start(struct device *dev) 601 { 602 struct omap_hdmi *hd = dev_get_drvdata(dev); 603 unsigned long flags; 604 605 WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); 606 607 spin_lock_irqsave(&hd->audio_playing_lock, flags); 608 609 if (hd->display_enabled) 610 hdmi_start_audio_stream(hd); 611 hd->audio_playing = true; 612 613 spin_unlock_irqrestore(&hd->audio_playing_lock, flags); 614 return 0; 615 } 616 617 static void hdmi_audio_stop(struct device *dev) 618 { 619 struct omap_hdmi *hd = dev_get_drvdata(dev); 620 unsigned long flags; 621 622 WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); 623 624 spin_lock_irqsave(&hd->audio_playing_lock, flags); 625 626 if (hd->display_enabled) 627 hdmi_stop_audio_stream(hd); 628 hd->audio_playing = false; 629 630 spin_unlock_irqrestore(&hd->audio_playing_lock, flags); 631 } 632 633 static int hdmi_audio_config(struct device *dev, 634 struct omap_dss_audio *dss_audio) 635 { 636 struct omap_hdmi *hd = dev_get_drvdata(dev); 637 int ret; 638 639 mutex_lock(&hd->lock); 640 641 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { 642 ret = -EPERM; 643 goto out; 644 } 645 646 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio, 647 hd->cfg.vm.pixelclock); 648 if (!ret) { 649 hd->audio_configured = true; 650 hd->audio_config = *dss_audio; 651 } 652 out: 653 mutex_unlock(&hd->lock); 654 655 return ret; 656 } 657 658 static const struct omap_hdmi_audio_ops hdmi_audio_ops = { 659 .audio_startup = hdmi_audio_startup, 660 .audio_shutdown = hdmi_audio_shutdown, 661 .audio_start = hdmi_audio_start, 662 .audio_stop = hdmi_audio_stop, 663 .audio_config = hdmi_audio_config, 664 }; 665 666 static int hdmi_audio_register(struct device *dev) 667 { 668 struct omap_hdmi_audio_pdata pdata = { 669 .dev = dev, 670 .dss_version = omapdss_get_version(), 671 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp), 672 .ops = &hdmi_audio_ops, 673 }; 674 675 hdmi.audio_pdev = platform_device_register_data( 676 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO, 677 &pdata, sizeof(pdata)); 678 679 if (IS_ERR(hdmi.audio_pdev)) 680 return PTR_ERR(hdmi.audio_pdev); 681 682 return 0; 683 } 684 685 /* HDMI HW IP initialisation */ 686 static int hdmi4_bind(struct device *dev, struct device *master, void *data) 687 { 688 struct platform_device *pdev = to_platform_device(dev); 689 int r; 690 int irq; 691 692 hdmi.pdev = pdev; 693 dev_set_drvdata(&pdev->dev, &hdmi); 694 695 mutex_init(&hdmi.lock); 696 spin_lock_init(&hdmi.audio_playing_lock); 697 698 if (pdev->dev.of_node) { 699 r = hdmi_probe_of(pdev); 700 if (r) 701 return r; 702 } 703 704 r = hdmi_wp_init(pdev, &hdmi.wp); 705 if (r) 706 return r; 707 708 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp); 709 if (r) 710 return r; 711 712 r = hdmi_phy_init(pdev, &hdmi.phy); 713 if (r) 714 goto err; 715 716 r = hdmi4_core_init(pdev, &hdmi.core); 717 if (r) 718 goto err; 719 720 irq = platform_get_irq(pdev, 0); 721 if (irq < 0) { 722 DSSERR("platform_get_irq failed\n"); 723 r = -ENODEV; 724 goto err; 725 } 726 727 r = devm_request_threaded_irq(&pdev->dev, irq, 728 NULL, hdmi_irq_handler, 729 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp); 730 if (r) { 731 DSSERR("HDMI IRQ request failed\n"); 732 goto err; 733 } 734 735 pm_runtime_enable(&pdev->dev); 736 737 hdmi_init_output(pdev); 738 739 r = hdmi_audio_register(&pdev->dev); 740 if (r) { 741 DSSERR("Registering HDMI audio failed\n"); 742 hdmi_uninit_output(pdev); 743 pm_runtime_disable(&pdev->dev); 744 return r; 745 } 746 747 dss_debugfs_create_file("hdmi", hdmi_dump_regs); 748 749 return 0; 750 err: 751 hdmi_pll_uninit(&hdmi.pll); 752 return r; 753 } 754 755 static void hdmi4_unbind(struct device *dev, struct device *master, void *data) 756 { 757 struct platform_device *pdev = to_platform_device(dev); 758 759 if (hdmi.audio_pdev) 760 platform_device_unregister(hdmi.audio_pdev); 761 762 hdmi_uninit_output(pdev); 763 764 hdmi_pll_uninit(&hdmi.pll); 765 766 pm_runtime_disable(&pdev->dev); 767 } 768 769 static const struct component_ops hdmi4_component_ops = { 770 .bind = hdmi4_bind, 771 .unbind = hdmi4_unbind, 772 }; 773 774 static int hdmi4_probe(struct platform_device *pdev) 775 { 776 return component_add(&pdev->dev, &hdmi4_component_ops); 777 } 778 779 static int hdmi4_remove(struct platform_device *pdev) 780 { 781 component_del(&pdev->dev, &hdmi4_component_ops); 782 return 0; 783 } 784 785 static int hdmi_runtime_suspend(struct device *dev) 786 { 787 dispc_runtime_put(); 788 789 return 0; 790 } 791 792 static int hdmi_runtime_resume(struct device *dev) 793 { 794 int r; 795 796 r = dispc_runtime_get(); 797 if (r < 0) 798 return r; 799 800 return 0; 801 } 802 803 static const struct dev_pm_ops hdmi_pm_ops = { 804 .runtime_suspend = hdmi_runtime_suspend, 805 .runtime_resume = hdmi_runtime_resume, 806 }; 807 808 static const struct of_device_id hdmi_of_match[] = { 809 { .compatible = "ti,omap4-hdmi", }, 810 {}, 811 }; 812 813 static struct platform_driver omapdss_hdmihw_driver = { 814 .probe = hdmi4_probe, 815 .remove = hdmi4_remove, 816 .driver = { 817 .name = "omapdss_hdmi", 818 .pm = &hdmi_pm_ops, 819 .of_match_table = hdmi_of_match, 820 .suppress_bind_attrs = true, 821 }, 822 }; 823 824 int __init hdmi4_init_platform_driver(void) 825 { 826 return platform_driver_register(&omapdss_hdmihw_driver); 827 } 828 829 void hdmi4_uninit_platform_driver(void) 830 { 831 platform_driver_unregister(&omapdss_hdmihw_driver); 832 } 833