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