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 <video/omapdss.h> 37 #include <sound/omap-hdmi-audio.h> 38 39 #include "hdmi4_core.h" 40 #include "dss.h" 41 #include "dss_features.h" 42 #include "hdmi.h" 43 44 static struct omap_hdmi hdmi; 45 46 static int hdmi_runtime_get(void) 47 { 48 int r; 49 50 DSSDBG("hdmi_runtime_get\n"); 51 52 r = pm_runtime_get_sync(&hdmi.pdev->dev); 53 WARN_ON(r < 0); 54 if (r < 0) 55 return r; 56 57 return 0; 58 } 59 60 static void hdmi_runtime_put(void) 61 { 62 int r; 63 64 DSSDBG("hdmi_runtime_put\n"); 65 66 r = pm_runtime_put_sync(&hdmi.pdev->dev); 67 WARN_ON(r < 0 && r != -ENOSYS); 68 } 69 70 static irqreturn_t hdmi_irq_handler(int irq, void *data) 71 { 72 struct hdmi_wp_data *wp = data; 73 u32 irqstatus; 74 75 irqstatus = hdmi_wp_get_irqstatus(wp); 76 hdmi_wp_set_irqstatus(wp, irqstatus); 77 78 if ((irqstatus & HDMI_IRQ_LINK_CONNECT) && 79 irqstatus & HDMI_IRQ_LINK_DISCONNECT) { 80 /* 81 * If we get both connect and disconnect interrupts at the same 82 * time, turn off the PHY, clear interrupts, and restart, which 83 * raises connect interrupt if a cable is connected, or nothing 84 * if cable is not connected. 85 */ 86 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF); 87 88 hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT | 89 HDMI_IRQ_LINK_DISCONNECT); 90 91 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 92 } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) { 93 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON); 94 } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) { 95 hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 96 } 97 98 return IRQ_HANDLED; 99 } 100 101 static int hdmi_init_regulator(void) 102 { 103 int r; 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 if (regulator_can_change_voltage(reg)) { 118 r = regulator_set_voltage(reg, 1800000, 1800000); 119 if (r) { 120 devm_regulator_put(reg); 121 DSSWARN("can't set the regulator voltage\n"); 122 return r; 123 } 124 } 125 126 hdmi.vdda_reg = reg; 127 128 return 0; 129 } 130 131 static int hdmi_power_on_core(struct omap_dss_device *dssdev) 132 { 133 int r; 134 135 r = regulator_enable(hdmi.vdda_reg); 136 if (r) 137 return r; 138 139 r = hdmi_runtime_get(); 140 if (r) 141 goto err_runtime_get; 142 143 /* Make selection of HDMI in DSS */ 144 dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK); 145 146 hdmi.core_enabled = true; 147 148 return 0; 149 150 err_runtime_get: 151 regulator_disable(hdmi.vdda_reg); 152 153 return r; 154 } 155 156 static void hdmi_power_off_core(struct omap_dss_device *dssdev) 157 { 158 hdmi.core_enabled = false; 159 160 hdmi_runtime_put(); 161 regulator_disable(hdmi.vdda_reg); 162 } 163 164 static int hdmi_power_on_full(struct omap_dss_device *dssdev) 165 { 166 int r; 167 struct omap_video_timings *p; 168 enum omap_channel channel = dssdev->dispc_channel; 169 struct hdmi_wp_data *wp = &hdmi.wp; 170 struct dss_pll_clock_info hdmi_cinfo = { 0 }; 171 unsigned pc; 172 173 r = hdmi_power_on_core(dssdev); 174 if (r) 175 return r; 176 177 /* disable and clear irqs */ 178 hdmi_wp_clear_irqenable(wp, 0xffffffff); 179 hdmi_wp_set_irqstatus(wp, 0xffffffff); 180 181 p = &hdmi.cfg.timings; 182 183 DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res); 184 185 pc = p->pixelclock; 186 if (p->double_pixel) 187 pc *= 2; 188 189 hdmi_pll_compute(&hdmi.pll, pc, &hdmi_cinfo); 190 191 r = dss_pll_enable(&hdmi.pll.pll); 192 if (r) { 193 DSSERR("Failed to enable PLL\n"); 194 goto err_pll_enable; 195 } 196 197 r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo); 198 if (r) { 199 DSSERR("Failed to configure PLL\n"); 200 goto err_pll_cfg; 201 } 202 203 r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco, 204 hdmi_cinfo.clkout[0]); 205 if (r) { 206 DSSDBG("Failed to configure PHY\n"); 207 goto err_phy_cfg; 208 } 209 210 r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); 211 if (r) 212 goto err_phy_pwr; 213 214 hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg); 215 216 /* bypass TV gamma table */ 217 dispc_enable_gamma_table(0); 218 219 /* tv size */ 220 dss_mgr_set_timings(channel, p); 221 222 r = dss_mgr_enable(channel); 223 if (r) 224 goto err_mgr_enable; 225 226 r = hdmi_wp_video_start(&hdmi.wp); 227 if (r) 228 goto err_vid_enable; 229 230 hdmi_wp_set_irqenable(wp, 231 HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT); 232 233 return 0; 234 235 err_vid_enable: 236 dss_mgr_disable(channel); 237 err_mgr_enable: 238 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); 239 err_phy_pwr: 240 err_phy_cfg: 241 err_pll_cfg: 242 dss_pll_disable(&hdmi.pll.pll); 243 err_pll_enable: 244 hdmi_power_off_core(dssdev); 245 return -EIO; 246 } 247 248 static void hdmi_power_off_full(struct omap_dss_device *dssdev) 249 { 250 enum omap_channel channel = dssdev->dispc_channel; 251 252 hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff); 253 254 hdmi_wp_video_stop(&hdmi.wp); 255 256 dss_mgr_disable(channel); 257 258 hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); 259 260 dss_pll_disable(&hdmi.pll.pll); 261 262 hdmi_power_off_core(dssdev); 263 } 264 265 static int hdmi_display_check_timing(struct omap_dss_device *dssdev, 266 struct omap_video_timings *timings) 267 { 268 if (!dispc_mgr_timings_ok(dssdev->dispc_channel, timings)) 269 return -EINVAL; 270 271 return 0; 272 } 273 274 static void hdmi_display_set_timing(struct omap_dss_device *dssdev, 275 struct omap_video_timings *timings) 276 { 277 mutex_lock(&hdmi.lock); 278 279 hdmi.cfg.timings = *timings; 280 281 dispc_set_tv_pclk(timings->pixelclock); 282 283 mutex_unlock(&hdmi.lock); 284 } 285 286 static void hdmi_display_get_timings(struct omap_dss_device *dssdev, 287 struct omap_video_timings *timings) 288 { 289 *timings = hdmi.cfg.timings; 290 } 291 292 static void hdmi_dump_regs(struct seq_file *s) 293 { 294 mutex_lock(&hdmi.lock); 295 296 if (hdmi_runtime_get()) { 297 mutex_unlock(&hdmi.lock); 298 return; 299 } 300 301 hdmi_wp_dump(&hdmi.wp, s); 302 hdmi_pll_dump(&hdmi.pll, s); 303 hdmi_phy_dump(&hdmi.phy, s); 304 hdmi4_core_dump(&hdmi.core, s); 305 306 hdmi_runtime_put(); 307 mutex_unlock(&hdmi.lock); 308 } 309 310 static int read_edid(u8 *buf, int len) 311 { 312 int r; 313 314 mutex_lock(&hdmi.lock); 315 316 r = hdmi_runtime_get(); 317 BUG_ON(r); 318 319 r = hdmi4_read_edid(&hdmi.core, buf, len); 320 321 hdmi_runtime_put(); 322 mutex_unlock(&hdmi.lock); 323 324 return r; 325 } 326 327 static void hdmi_start_audio_stream(struct omap_hdmi *hd) 328 { 329 hdmi_wp_audio_enable(&hd->wp, true); 330 hdmi4_audio_start(&hd->core, &hd->wp); 331 } 332 333 static void hdmi_stop_audio_stream(struct omap_hdmi *hd) 334 { 335 hdmi4_audio_stop(&hd->core, &hd->wp); 336 hdmi_wp_audio_enable(&hd->wp, false); 337 } 338 339 static int hdmi_display_enable(struct omap_dss_device *dssdev) 340 { 341 struct omap_dss_device *out = &hdmi.output; 342 unsigned long flags; 343 int r = 0; 344 345 DSSDBG("ENTER hdmi_display_enable\n"); 346 347 mutex_lock(&hdmi.lock); 348 349 if (!out->dispc_channel_connected) { 350 DSSERR("failed to enable display: no output/manager\n"); 351 r = -ENODEV; 352 goto err0; 353 } 354 355 r = hdmi_power_on_full(dssdev); 356 if (r) { 357 DSSERR("failed to power on device\n"); 358 goto err0; 359 } 360 361 if (hdmi.audio_configured) { 362 r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config, 363 hdmi.cfg.timings.pixelclock); 364 if (r) { 365 DSSERR("Error restoring audio configuration: %d", r); 366 hdmi.audio_abort_cb(&hdmi.pdev->dev); 367 hdmi.audio_configured = false; 368 } 369 } 370 371 spin_lock_irqsave(&hdmi.audio_playing_lock, flags); 372 if (hdmi.audio_configured && hdmi.audio_playing) 373 hdmi_start_audio_stream(&hdmi); 374 hdmi.display_enabled = true; 375 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); 376 377 mutex_unlock(&hdmi.lock); 378 return 0; 379 380 err0: 381 mutex_unlock(&hdmi.lock); 382 return r; 383 } 384 385 static void hdmi_display_disable(struct omap_dss_device *dssdev) 386 { 387 unsigned long flags; 388 389 DSSDBG("Enter hdmi_display_disable\n"); 390 391 mutex_lock(&hdmi.lock); 392 393 spin_lock_irqsave(&hdmi.audio_playing_lock, flags); 394 hdmi_stop_audio_stream(&hdmi); 395 hdmi.display_enabled = false; 396 spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); 397 398 hdmi_power_off_full(dssdev); 399 400 mutex_unlock(&hdmi.lock); 401 } 402 403 static int hdmi_core_enable(struct omap_dss_device *dssdev) 404 { 405 int r = 0; 406 407 DSSDBG("ENTER omapdss_hdmi_core_enable\n"); 408 409 mutex_lock(&hdmi.lock); 410 411 r = hdmi_power_on_core(dssdev); 412 if (r) { 413 DSSERR("failed to power on device\n"); 414 goto err0; 415 } 416 417 mutex_unlock(&hdmi.lock); 418 return 0; 419 420 err0: 421 mutex_unlock(&hdmi.lock); 422 return r; 423 } 424 425 static void hdmi_core_disable(struct omap_dss_device *dssdev) 426 { 427 DSSDBG("Enter omapdss_hdmi_core_disable\n"); 428 429 mutex_lock(&hdmi.lock); 430 431 hdmi_power_off_core(dssdev); 432 433 mutex_unlock(&hdmi.lock); 434 } 435 436 static int hdmi_connect(struct omap_dss_device *dssdev, 437 struct omap_dss_device *dst) 438 { 439 enum omap_channel channel = dssdev->dispc_channel; 440 int r; 441 442 r = hdmi_init_regulator(); 443 if (r) 444 return r; 445 446 r = dss_mgr_connect(channel, dssdev); 447 if (r) 448 return r; 449 450 r = omapdss_output_set_device(dssdev, dst); 451 if (r) { 452 DSSERR("failed to connect output to new device: %s\n", 453 dst->name); 454 dss_mgr_disconnect(channel, dssdev); 455 return r; 456 } 457 458 return 0; 459 } 460 461 static void hdmi_disconnect(struct omap_dss_device *dssdev, 462 struct omap_dss_device *dst) 463 { 464 enum omap_channel channel = dssdev->dispc_channel; 465 466 WARN_ON(dst != dssdev->dst); 467 468 if (dst != dssdev->dst) 469 return; 470 471 omapdss_output_unset_device(dssdev); 472 473 dss_mgr_disconnect(channel, dssdev); 474 } 475 476 static int hdmi_read_edid(struct omap_dss_device *dssdev, 477 u8 *edid, int len) 478 { 479 bool need_enable; 480 int r; 481 482 need_enable = hdmi.core_enabled == false; 483 484 if (need_enable) { 485 r = hdmi_core_enable(dssdev); 486 if (r) 487 return r; 488 } 489 490 r = read_edid(edid, len); 491 492 if (need_enable) 493 hdmi_core_disable(dssdev); 494 495 return r; 496 } 497 498 static int hdmi_set_infoframe(struct omap_dss_device *dssdev, 499 const struct hdmi_avi_infoframe *avi) 500 { 501 hdmi.cfg.infoframe = *avi; 502 return 0; 503 } 504 505 static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev, 506 bool hdmi_mode) 507 { 508 hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI; 509 return 0; 510 } 511 512 static const struct omapdss_hdmi_ops hdmi_ops = { 513 .connect = hdmi_connect, 514 .disconnect = hdmi_disconnect, 515 516 .enable = hdmi_display_enable, 517 .disable = hdmi_display_disable, 518 519 .check_timings = hdmi_display_check_timing, 520 .set_timings = hdmi_display_set_timing, 521 .get_timings = hdmi_display_get_timings, 522 523 .read_edid = hdmi_read_edid, 524 .set_infoframe = hdmi_set_infoframe, 525 .set_hdmi_mode = hdmi_set_hdmi_mode, 526 }; 527 528 static void hdmi_init_output(struct platform_device *pdev) 529 { 530 struct omap_dss_device *out = &hdmi.output; 531 532 out->dev = &pdev->dev; 533 out->id = OMAP_DSS_OUTPUT_HDMI; 534 out->output_type = OMAP_DISPLAY_TYPE_HDMI; 535 out->name = "hdmi.0"; 536 out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT; 537 out->ops.hdmi = &hdmi_ops; 538 out->owner = THIS_MODULE; 539 540 omapdss_register_output(out); 541 } 542 543 static void hdmi_uninit_output(struct platform_device *pdev) 544 { 545 struct omap_dss_device *out = &hdmi.output; 546 547 omapdss_unregister_output(out); 548 } 549 550 static int hdmi_probe_of(struct platform_device *pdev) 551 { 552 struct device_node *node = pdev->dev.of_node; 553 struct device_node *ep; 554 int r; 555 556 ep = omapdss_of_get_first_endpoint(node); 557 if (!ep) 558 return 0; 559 560 r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy); 561 if (r) 562 goto err; 563 564 of_node_put(ep); 565 return 0; 566 567 err: 568 of_node_put(ep); 569 return r; 570 } 571 572 /* Audio callbacks */ 573 static int hdmi_audio_startup(struct device *dev, 574 void (*abort_cb)(struct device *dev)) 575 { 576 struct omap_hdmi *hd = dev_get_drvdata(dev); 577 int ret = 0; 578 579 mutex_lock(&hd->lock); 580 581 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { 582 ret = -EPERM; 583 goto out; 584 } 585 586 hd->audio_abort_cb = abort_cb; 587 588 out: 589 mutex_unlock(&hd->lock); 590 591 return ret; 592 } 593 594 static int hdmi_audio_shutdown(struct device *dev) 595 { 596 struct omap_hdmi *hd = dev_get_drvdata(dev); 597 598 mutex_lock(&hd->lock); 599 hd->audio_abort_cb = NULL; 600 hd->audio_configured = false; 601 hd->audio_playing = false; 602 mutex_unlock(&hd->lock); 603 604 return 0; 605 } 606 607 static int hdmi_audio_start(struct device *dev) 608 { 609 struct omap_hdmi *hd = dev_get_drvdata(dev); 610 unsigned long flags; 611 612 WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); 613 614 spin_lock_irqsave(&hd->audio_playing_lock, flags); 615 616 if (hd->display_enabled) 617 hdmi_start_audio_stream(hd); 618 hd->audio_playing = true; 619 620 spin_unlock_irqrestore(&hd->audio_playing_lock, flags); 621 return 0; 622 } 623 624 static void hdmi_audio_stop(struct device *dev) 625 { 626 struct omap_hdmi *hd = dev_get_drvdata(dev); 627 unsigned long flags; 628 629 WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); 630 631 spin_lock_irqsave(&hd->audio_playing_lock, flags); 632 633 if (hd->display_enabled) 634 hdmi_stop_audio_stream(hd); 635 hd->audio_playing = false; 636 637 spin_unlock_irqrestore(&hd->audio_playing_lock, flags); 638 } 639 640 static int hdmi_audio_config(struct device *dev, 641 struct omap_dss_audio *dss_audio) 642 { 643 struct omap_hdmi *hd = dev_get_drvdata(dev); 644 int ret; 645 646 mutex_lock(&hd->lock); 647 648 if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { 649 ret = -EPERM; 650 goto out; 651 } 652 653 ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio, 654 hd->cfg.timings.pixelclock); 655 if (!ret) { 656 hd->audio_configured = true; 657 hd->audio_config = *dss_audio; 658 } 659 out: 660 mutex_unlock(&hd->lock); 661 662 return ret; 663 } 664 665 static const struct omap_hdmi_audio_ops hdmi_audio_ops = { 666 .audio_startup = hdmi_audio_startup, 667 .audio_shutdown = hdmi_audio_shutdown, 668 .audio_start = hdmi_audio_start, 669 .audio_stop = hdmi_audio_stop, 670 .audio_config = hdmi_audio_config, 671 }; 672 673 static int hdmi_audio_register(struct device *dev) 674 { 675 struct omap_hdmi_audio_pdata pdata = { 676 .dev = dev, 677 .dss_version = omapdss_get_version(), 678 .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp), 679 .ops = &hdmi_audio_ops, 680 }; 681 682 hdmi.audio_pdev = platform_device_register_data( 683 dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO, 684 &pdata, sizeof(pdata)); 685 686 if (IS_ERR(hdmi.audio_pdev)) 687 return PTR_ERR(hdmi.audio_pdev); 688 689 return 0; 690 } 691 692 /* HDMI HW IP initialisation */ 693 static int hdmi4_bind(struct device *dev, struct device *master, void *data) 694 { 695 struct platform_device *pdev = to_platform_device(dev); 696 int r; 697 int irq; 698 699 hdmi.pdev = pdev; 700 dev_set_drvdata(&pdev->dev, &hdmi); 701 702 mutex_init(&hdmi.lock); 703 spin_lock_init(&hdmi.audio_playing_lock); 704 705 if (pdev->dev.of_node) { 706 r = hdmi_probe_of(pdev); 707 if (r) 708 return r; 709 } 710 711 r = hdmi_wp_init(pdev, &hdmi.wp); 712 if (r) 713 return r; 714 715 r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp); 716 if (r) 717 return r; 718 719 r = hdmi_phy_init(pdev, &hdmi.phy); 720 if (r) 721 goto err; 722 723 r = hdmi4_core_init(pdev, &hdmi.core); 724 if (r) 725 goto err; 726 727 irq = platform_get_irq(pdev, 0); 728 if (irq < 0) { 729 DSSERR("platform_get_irq failed\n"); 730 r = -ENODEV; 731 goto err; 732 } 733 734 r = devm_request_threaded_irq(&pdev->dev, irq, 735 NULL, hdmi_irq_handler, 736 IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp); 737 if (r) { 738 DSSERR("HDMI IRQ request failed\n"); 739 goto err; 740 } 741 742 pm_runtime_enable(&pdev->dev); 743 744 hdmi_init_output(pdev); 745 746 r = hdmi_audio_register(&pdev->dev); 747 if (r) { 748 DSSERR("Registering HDMI audio failed\n"); 749 hdmi_uninit_output(pdev); 750 pm_runtime_disable(&pdev->dev); 751 return r; 752 } 753 754 dss_debugfs_create_file("hdmi", hdmi_dump_regs); 755 756 return 0; 757 err: 758 hdmi_pll_uninit(&hdmi.pll); 759 return r; 760 } 761 762 static void hdmi4_unbind(struct device *dev, struct device *master, void *data) 763 { 764 struct platform_device *pdev = to_platform_device(dev); 765 766 if (hdmi.audio_pdev) 767 platform_device_unregister(hdmi.audio_pdev); 768 769 hdmi_uninit_output(pdev); 770 771 hdmi_pll_uninit(&hdmi.pll); 772 773 pm_runtime_disable(&pdev->dev); 774 } 775 776 static const struct component_ops hdmi4_component_ops = { 777 .bind = hdmi4_bind, 778 .unbind = hdmi4_unbind, 779 }; 780 781 static int hdmi4_probe(struct platform_device *pdev) 782 { 783 return component_add(&pdev->dev, &hdmi4_component_ops); 784 } 785 786 static int hdmi4_remove(struct platform_device *pdev) 787 { 788 component_del(&pdev->dev, &hdmi4_component_ops); 789 return 0; 790 } 791 792 static int hdmi_runtime_suspend(struct device *dev) 793 { 794 dispc_runtime_put(); 795 796 return 0; 797 } 798 799 static int hdmi_runtime_resume(struct device *dev) 800 { 801 int r; 802 803 r = dispc_runtime_get(); 804 if (r < 0) 805 return r; 806 807 return 0; 808 } 809 810 static const struct dev_pm_ops hdmi_pm_ops = { 811 .runtime_suspend = hdmi_runtime_suspend, 812 .runtime_resume = hdmi_runtime_resume, 813 }; 814 815 static const struct of_device_id hdmi_of_match[] = { 816 { .compatible = "ti,omap4-hdmi", }, 817 {}, 818 }; 819 820 static struct platform_driver omapdss_hdmihw_driver = { 821 .probe = hdmi4_probe, 822 .remove = hdmi4_remove, 823 .driver = { 824 .name = "omapdss_hdmi", 825 .pm = &hdmi_pm_ops, 826 .of_match_table = hdmi_of_match, 827 .suppress_bind_attrs = true, 828 }, 829 }; 830 831 int __init hdmi4_init_platform_driver(void) 832 { 833 return platform_driver_register(&omapdss_hdmihw_driver); 834 } 835 836 void hdmi4_uninit_platform_driver(void) 837 { 838 platform_driver_unregister(&omapdss_hdmihw_driver); 839 } 840