drivers/gpu/drm/msm/hdmi/hdmi.c

   1 /*
   2  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/of_irq.h>
  20 #include <linux/of_gpio.h>
  21
  22 #include <sound/hdmi-codec.h>
  23 #include "hdmi.h"
  24
  25 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
  26 {
  27         uint32_t ctrl = 0;
  28         unsigned long flags;
  29
  30         spin_lock_irqsave(&hdmi->reg_lock, flags);
  31         if (power_on) {
  32                 ctrl |= HDMI_CTRL_ENABLE;
  33                 if (!hdmi->hdmi_mode) {
  34                         ctrl |= HDMI_CTRL_HDMI;
  35                         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  36                         ctrl &= ~HDMI_CTRL_HDMI;
  37                 } else {
  38                         ctrl |= HDMI_CTRL_HDMI;
  39                 }
  40         } else {
  41                 ctrl = HDMI_CTRL_HDMI;
  42         }
  43
  44         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  45         spin_unlock_irqrestore(&hdmi->reg_lock, flags);
  46         DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
  47                         power_on ? "Enable" : "Disable", ctrl);
  48 }
  49
  50 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
  51 {
  52         struct hdmi *hdmi = dev_id;
  53
  54         /* Process HPD: */
  55         msm_hdmi_connector_irq(hdmi->connector);
  56
  57         /* Process DDC: */
  58         msm_hdmi_i2c_irq(hdmi->i2c);
  59
  60         /* Process HDCP: */
  61         if (hdmi->hdcp_ctrl)
  62                 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
  63
  64         /* TODO audio.. */
  65
  66         return IRQ_HANDLED;
  67 }
  68
  69 static void msm_hdmi_destroy(struct hdmi *hdmi)
  70 {
  71         /*
  72          * at this point, hpd has been disabled,
  73          * after flush workq, it's safe to deinit hdcp
  74          */
  75         if (hdmi->workq) {
  76                 flush_workqueue(hdmi->workq);
  77                 destroy_workqueue(hdmi->workq);
  78         }
  79         msm_hdmi_hdcp_destroy(hdmi);
  80
  81         if (hdmi->phy_dev) {
  82                 put_device(hdmi->phy_dev);
  83                 hdmi->phy = NULL;
  84                 hdmi->phy_dev = NULL;
  85         }
  86
  87         if (hdmi->i2c)
  88                 msm_hdmi_i2c_destroy(hdmi->i2c);
  89
  90         platform_set_drvdata(hdmi->pdev, NULL);
  91 }
  92
  93 static int msm_hdmi_get_phy(struct hdmi *hdmi)
  94 {
  95         struct platform_device *pdev = hdmi->pdev;
  96         struct platform_device *phy_pdev;
  97         struct device_node *phy_node;
  98
  99         phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
 100         if (!phy_node) {
 101                 dev_err(&pdev->dev, "cannot find phy device\n");
 102                 return -ENXIO;
 103         }
 104
 105         phy_pdev = of_find_device_by_node(phy_node);
 106         if (phy_pdev)
 107                 hdmi->phy = platform_get_drvdata(phy_pdev);
 108
 109         of_node_put(phy_node);
 110
 111         if (!phy_pdev || !hdmi->phy) {
 112                 dev_err(&pdev->dev, "phy driver is not ready\n");
 113                 return -EPROBE_DEFER;
 114         }
 115
 116         hdmi->phy_dev = get_device(&phy_pdev->dev);
 117
 118         return 0;
 119 }
 120
 121 /* construct hdmi at bind/probe time, grab all the resources.  If
 122  * we are to EPROBE_DEFER we want to do it here, rather than later
 123  * at modeset_init() time
 124  */
 125 static struct hdmi *msm_hdmi_init(struct platform_device *pdev)
 126 {
 127         struct hdmi_platform_config *config = pdev->dev.platform_data;
 128         struct hdmi *hdmi = NULL;
 129         struct resource *res;
 130         int i, ret;
 131
 132         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 133         if (!hdmi) {
 134                 ret = -ENOMEM;
 135                 goto fail;
 136         }
 137
 138         hdmi->pdev = pdev;
 139         hdmi->config = config;
 140         spin_lock_init(&hdmi->reg_lock);
 141
 142         hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI");
 143         if (IS_ERR(hdmi->mmio)) {
 144                 ret = PTR_ERR(hdmi->mmio);
 145                 goto fail;
 146         }
 147
 148         /* HDCP needs physical address of hdmi register */
 149         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 150                 config->mmio_name);
 151         hdmi->mmio_phy_addr = res->start;
 152
 153         hdmi->qfprom_mmio = msm_ioremap(pdev,
 154                 config->qfprom_mmio_name, "HDMI_QFPROM");
 155         if (IS_ERR(hdmi->qfprom_mmio)) {
 156                 dev_info(&pdev->dev, "can't find qfprom resource\n");
 157                 hdmi->qfprom_mmio = NULL;
 158         }
 159
 160         hdmi->hpd_regs = devm_kcalloc(&pdev->dev,
 161                                       config->hpd_reg_cnt,
 162                                       sizeof(hdmi->hpd_regs[0]),
 163                                       GFP_KERNEL);
 164         if (!hdmi->hpd_regs) {
 165                 ret = -ENOMEM;
 166                 goto fail;
 167         }
 168         for (i = 0; i < config->hpd_reg_cnt; i++) {
 169                 struct regulator *reg;
 170
 171                 reg = devm_regulator_get(&pdev->dev,
 172                                 config->hpd_reg_names[i]);
 173                 if (IS_ERR(reg)) {
 174                         ret = PTR_ERR(reg);
 175                         dev_err(&pdev->dev, "failed to get hpd regulator: %s (%d)\n",
 176                                         config->hpd_reg_names[i], ret);
 177                         goto fail;
 178                 }
 179
 180                 hdmi->hpd_regs[i] = reg;
 181         }
 182
 183         hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
 184                                       config->pwr_reg_cnt,
 185                                       sizeof(hdmi->pwr_regs[0]),
 186                                       GFP_KERNEL);
 187         if (!hdmi->pwr_regs) {
 188                 ret = -ENOMEM;
 189                 goto fail;
 190         }
 191         for (i = 0; i < config->pwr_reg_cnt; i++) {
 192                 struct regulator *reg;
 193
 194                 reg = devm_regulator_get(&pdev->dev,
 195                                 config->pwr_reg_names[i]);
 196                 if (IS_ERR(reg)) {
 197                         ret = PTR_ERR(reg);
 198                         dev_err(&pdev->dev, "failed to get pwr regulator: %s (%d)\n",
 199                                         config->pwr_reg_names[i], ret);
 200                         goto fail;
 201                 }
 202
 203                 hdmi->pwr_regs[i] = reg;
 204         }
 205
 206         hdmi->hpd_clks = devm_kcalloc(&pdev->dev,
 207                                       config->hpd_clk_cnt,
 208                                       sizeof(hdmi->hpd_clks[0]),
 209                                       GFP_KERNEL);
 210         if (!hdmi->hpd_clks) {
 211                 ret = -ENOMEM;
 212                 goto fail;
 213         }
 214         for (i = 0; i < config->hpd_clk_cnt; i++) {
 215                 struct clk *clk;
 216
 217                 clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
 218                 if (IS_ERR(clk)) {
 219                         ret = PTR_ERR(clk);
 220                         dev_err(&pdev->dev, "failed to get hpd clk: %s (%d)\n",
 221                                         config->hpd_clk_names[i], ret);
 222                         goto fail;
 223                 }
 224
 225                 hdmi->hpd_clks[i] = clk;
 226         }
 227
 228         hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
 229                                       config->pwr_clk_cnt,
 230                                       sizeof(hdmi->pwr_clks[0]),
 231                                       GFP_KERNEL);
 232         if (!hdmi->pwr_clks) {
 233                 ret = -ENOMEM;
 234                 goto fail;
 235         }
 236         for (i = 0; i < config->pwr_clk_cnt; i++) {
 237                 struct clk *clk;
 238
 239                 clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
 240                 if (IS_ERR(clk)) {
 241                         ret = PTR_ERR(clk);
 242                         dev_err(&pdev->dev, "failed to get pwr clk: %s (%d)\n",
 243                                         config->pwr_clk_names[i], ret);
 244                         goto fail;
 245                 }
 246
 247                 hdmi->pwr_clks[i] = clk;
 248         }
 249
 250         pm_runtime_enable(&pdev->dev);
 251
 252         hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
 253
 254         hdmi->i2c = msm_hdmi_i2c_init(hdmi);
 255         if (IS_ERR(hdmi->i2c)) {
 256                 ret = PTR_ERR(hdmi->i2c);
 257                 dev_err(&pdev->dev, "failed to get i2c: %d\n", ret);
 258                 hdmi->i2c = NULL;
 259                 goto fail;
 260         }
 261
 262         ret = msm_hdmi_get_phy(hdmi);
 263         if (ret) {
 264                 dev_err(&pdev->dev, "failed to get phy\n");
 265                 goto fail;
 266         }
 267
 268         hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
 269         if (IS_ERR(hdmi->hdcp_ctrl)) {
 270                 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
 271                 hdmi->hdcp_ctrl = NULL;
 272         }
 273
 274         return hdmi;
 275
 276 fail:
 277         if (hdmi)
 278                 msm_hdmi_destroy(hdmi);
 279
 280         return ERR_PTR(ret);
 281 }
 282
 283 /* Second part of initialization, the drm/kms level modeset_init,
 284  * constructs/initializes mode objects, etc, is called from master
 285  * driver (not hdmi sub-device's probe/bind!)
 286  *
 287  * Any resource (regulator/clk/etc) which could be missing at boot
 288  * should be handled in msm_hdmi_init() so that failure happens from
 289  * hdmi sub-device's probe.
 290  */
 291 int msm_hdmi_modeset_init(struct hdmi *hdmi,
 292                 struct drm_device *dev, struct drm_encoder *encoder)
 293 {
 294         struct msm_drm_private *priv = dev->dev_private;
 295         struct platform_device *pdev = hdmi->pdev;
 296         int ret;
 297
 298         hdmi->dev = dev;
 299         hdmi->encoder = encoder;
 300
 301         hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
 302
 303         hdmi->bridge = msm_hdmi_bridge_init(hdmi);
 304         if (IS_ERR(hdmi->bridge)) {
 305                 ret = PTR_ERR(hdmi->bridge);
 306                 dev_err(dev->dev, "failed to create HDMI bridge: %d\n", ret);
 307                 hdmi->bridge = NULL;
 308                 goto fail;
 309         }
 310
 311         hdmi->connector = msm_hdmi_connector_init(hdmi);
 312         if (IS_ERR(hdmi->connector)) {
 313                 ret = PTR_ERR(hdmi->connector);
 314                 dev_err(dev->dev, "failed to create HDMI connector: %d\n", ret);
 315                 hdmi->connector = NULL;
 316                 goto fail;
 317         }
 318
 319         hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 320         if (hdmi->irq < 0) {
 321                 ret = hdmi->irq;
 322                 dev_err(dev->dev, "failed to get irq: %d\n", ret);
 323                 goto fail;
 324         }
 325
 326         ret = devm_request_irq(&pdev->dev, hdmi->irq,
 327                         msm_hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 328                         "hdmi_isr", hdmi);
 329         if (ret < 0) {
 330                 dev_err(dev->dev, "failed to request IRQ%u: %d\n",
 331                                 hdmi->irq, ret);
 332                 goto fail;
 333         }
 334
 335         ret = msm_hdmi_hpd_enable(hdmi->connector);
 336         if (ret < 0) {
 337                 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
 338                 goto fail;
 339         }
 340
 341         encoder->bridge = hdmi->bridge;
 342
 343         priv->bridges[priv->num_bridges++]       = hdmi->bridge;
 344         priv->connectors[priv->num_connectors++] = hdmi->connector;
 345
 346         platform_set_drvdata(pdev, hdmi);
 347
 348         return 0;
 349
 350 fail:
 351         /* bridge is normally destroyed by drm: */
 352         if (hdmi->bridge) {
 353                 msm_hdmi_bridge_destroy(hdmi->bridge);
 354                 hdmi->bridge = NULL;
 355         }
 356         if (hdmi->connector) {
 357                 hdmi->connector->funcs->destroy(hdmi->connector);
 358                 hdmi->connector = NULL;
 359         }
 360
 361         return ret;
 362 }
 363
 364 /*
 365  * The hdmi device:
 366  */
 367
 368 #define HDMI_CFG(item, entry) \
 369         .item ## _names = item ##_names_ ## entry, \
 370         .item ## _cnt   = ARRAY_SIZE(item ## _names_ ## entry)
 371
 372 static const char *pwr_reg_names_none[] = {};
 373 static const char *hpd_reg_names_none[] = {};
 374
 375 static struct hdmi_platform_config hdmi_tx_8660_config;
 376
 377 static const char *hpd_reg_names_8960[] = {"core-vdda", "hdmi-mux"};
 378 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
 379
 380 static struct hdmi_platform_config hdmi_tx_8960_config = {
 381                 HDMI_CFG(hpd_reg, 8960),
 382                 HDMI_CFG(hpd_clk, 8960),
 383 };
 384
 385 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
 386 static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"};
 387 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
 388 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
 389 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
 390
 391 static struct hdmi_platform_config hdmi_tx_8974_config = {
 392                 HDMI_CFG(pwr_reg, 8x74),
 393                 HDMI_CFG(hpd_reg, 8x74),
 394                 HDMI_CFG(pwr_clk, 8x74),
 395                 HDMI_CFG(hpd_clk, 8x74),
 396                 .hpd_freq      = hpd_clk_freq_8x74,
 397 };
 398
 399 static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
 400
 401 static struct hdmi_platform_config hdmi_tx_8084_config = {
 402                 HDMI_CFG(pwr_reg, 8x74),
 403                 HDMI_CFG(hpd_reg, 8084),
 404                 HDMI_CFG(pwr_clk, 8x74),
 405                 HDMI_CFG(hpd_clk, 8x74),
 406                 .hpd_freq      = hpd_clk_freq_8x74,
 407 };
 408
 409 static struct hdmi_platform_config hdmi_tx_8994_config = {
 410                 HDMI_CFG(pwr_reg, 8x74),
 411                 HDMI_CFG(hpd_reg, none),
 412                 HDMI_CFG(pwr_clk, 8x74),
 413                 HDMI_CFG(hpd_clk, 8x74),
 414                 .hpd_freq      = hpd_clk_freq_8x74,
 415 };
 416
 417 static struct hdmi_platform_config hdmi_tx_8996_config = {
 418                 HDMI_CFG(pwr_reg, none),
 419                 HDMI_CFG(hpd_reg, none),
 420                 HDMI_CFG(pwr_clk, 8x74),
 421                 HDMI_CFG(hpd_clk, 8x74),
 422                 .hpd_freq      = hpd_clk_freq_8x74,
 423 };
 424
 425 static const struct {
 426         const char *name;
 427         const bool output;
 428         const int value;
 429         const char *label;
 430 } msm_hdmi_gpio_pdata[] = {
 431         { "qcom,hdmi-tx-ddc-clk", true, 1, "HDMI_DDC_CLK" },
 432         { "qcom,hdmi-tx-ddc-data", true, 1, "HDMI_DDC_DATA" },
 433         { "qcom,hdmi-tx-hpd", false, 1, "HDMI_HPD" },
 434         { "qcom,hdmi-tx-mux-en", true, 1, "HDMI_MUX_EN" },
 435         { "qcom,hdmi-tx-mux-sel", true, 0, "HDMI_MUX_SEL" },
 436         { "qcom,hdmi-tx-mux-lpm", true, 1, "HDMI_MUX_LPM" },
 437 };
 438
 439 static int msm_hdmi_get_gpio(struct device_node *of_node, const char *name)
 440 {
 441         int gpio;
 442
 443         /* try with the gpio names as in the table (downstream bindings) */
 444         gpio = of_get_named_gpio(of_node, name, 0);
 445         if (gpio < 0) {
 446                 char name2[32];
 447
 448                 /* try with the gpio names as in the upstream bindings */
 449                 snprintf(name2, sizeof(name2), "%s-gpios", name);
 450                 gpio = of_get_named_gpio(of_node, name2, 0);
 451                 if (gpio < 0) {
 452                         char name3[32];
 453
 454                         /*
 455                          * try again after stripping out the "qcom,hdmi-tx"
 456                          * prefix. This is mainly to match "hpd-gpios" used
 457                          * in the upstream bindings
 458                          */
 459                         if (sscanf(name2, "qcom,hdmi-tx-%s", name3))
 460                                 gpio = of_get_named_gpio(of_node, name3, 0);
 461                 }
 462
 463                 if (gpio < 0) {
 464                         DBG("failed to get gpio: %s (%d)", name, gpio);
 465                         gpio = -1;
 466                 }
 467         }
 468         return gpio;
 469 }
 470
 471 /*
 472  * HDMI audio codec callbacks
 473  */
 474 static int msm_hdmi_audio_hw_params(struct device *dev, void *data,
 475                                     struct hdmi_codec_daifmt *daifmt,
 476                                     struct hdmi_codec_params *params)
 477 {
 478         struct hdmi *hdmi = dev_get_drvdata(dev);
 479         unsigned int chan;
 480         unsigned int channel_allocation = 0;
 481         unsigned int rate;
 482         unsigned int level_shift  = 0; /* 0dB */
 483         bool down_mix = false;
 484
 485         dev_dbg(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate,
 486                  params->sample_width, params->cea.channels);
 487
 488         switch (params->cea.channels) {
 489         case 2:
 490                 /* FR and FL speakers */
 491                 channel_allocation  = 0;
 492                 chan = MSM_HDMI_AUDIO_CHANNEL_2;
 493                 break;
 494         case 4:
 495                 /* FC, LFE, FR and FL speakers */
 496                 channel_allocation  = 0x3;
 497                 chan = MSM_HDMI_AUDIO_CHANNEL_4;
 498                 break;
 499         case 6:
 500                 /* RR, RL, FC, LFE, FR and FL speakers */
 501                 channel_allocation  = 0x0B;
 502                 chan = MSM_HDMI_AUDIO_CHANNEL_6;
 503                 break;
 504         case 8:
 505                 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */
 506                 channel_allocation  = 0x1F;
 507                 chan = MSM_HDMI_AUDIO_CHANNEL_8;
 508                 break;
 509         default:
 510                 return -EINVAL;
 511         }
 512
 513         switch (params->sample_rate) {
 514         case 32000:
 515                 rate = HDMI_SAMPLE_RATE_32KHZ;
 516                 break;
 517         case 44100:
 518                 rate = HDMI_SAMPLE_RATE_44_1KHZ;
 519                 break;
 520         case 48000:
 521                 rate = HDMI_SAMPLE_RATE_48KHZ;
 522                 break;
 523         case 88200:
 524                 rate = HDMI_SAMPLE_RATE_88_2KHZ;
 525                 break;
 526         case 96000:
 527                 rate = HDMI_SAMPLE_RATE_96KHZ;
 528                 break;
 529         case 176400:
 530                 rate = HDMI_SAMPLE_RATE_176_4KHZ;
 531                 break;
 532         case 192000:
 533                 rate = HDMI_SAMPLE_RATE_192KHZ;
 534                 break;
 535         default:
 536                 dev_err(dev, "rate[%d] not supported!\n",
 537                         params->sample_rate);
 538                 return -EINVAL;
 539         }
 540
 541         msm_hdmi_audio_set_sample_rate(hdmi, rate);
 542         msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation,
 543                               level_shift, down_mix);
 544
 545         return 0;
 546 }
 547
 548 static void msm_hdmi_audio_shutdown(struct device *dev, void *data)
 549 {
 550         struct hdmi *hdmi = dev_get_drvdata(dev);
 551
 552         msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0);
 553 }
 554
 555 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = {
 556         .hw_params = msm_hdmi_audio_hw_params,
 557         .audio_shutdown = msm_hdmi_audio_shutdown,
 558 };
 559
 560 static struct hdmi_codec_pdata codec_data = {
 561         .ops = &msm_hdmi_audio_codec_ops,
 562         .max_i2s_channels = 8,
 563         .i2s = 1,
 564 };
 565
 566 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev)
 567 {
 568         hdmi->audio_pdev = platform_device_register_data(dev,
 569                                                          HDMI_CODEC_DRV_NAME,
 570                                                          PLATFORM_DEVID_AUTO,
 571                                                          &codec_data,
 572                                                          sizeof(codec_data));
 573         return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
 574 }
 575
 576 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
 577 {
 578         struct drm_device *drm = dev_get_drvdata(master);
 579         struct msm_drm_private *priv = drm->dev_private;
 580         static struct hdmi_platform_config *hdmi_cfg;
 581         struct hdmi *hdmi;
 582         struct device_node *of_node = dev->of_node;
 583         int i, err;
 584
 585         hdmi_cfg = (struct hdmi_platform_config *)
 586                         of_device_get_match_data(dev);
 587         if (!hdmi_cfg) {
 588                 dev_err(dev, "unknown hdmi_cfg: %s\n", of_node->name);
 589                 return -ENXIO;
 590         }
 591
 592         hdmi_cfg->mmio_name     = "core_physical";
 593         hdmi_cfg->qfprom_mmio_name = "qfprom_physical";
 594
 595         for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
 596                 hdmi_cfg->gpios[i].num = msm_hdmi_get_gpio(of_node,
 597                                                 msm_hdmi_gpio_pdata[i].name);
 598                 hdmi_cfg->gpios[i].output = msm_hdmi_gpio_pdata[i].output;
 599                 hdmi_cfg->gpios[i].value = msm_hdmi_gpio_pdata[i].value;
 600                 hdmi_cfg->gpios[i].label = msm_hdmi_gpio_pdata[i].label;
 601         }
 602
 603         dev->platform_data = hdmi_cfg;
 604
 605         hdmi = msm_hdmi_init(to_platform_device(dev));
 606         if (IS_ERR(hdmi))
 607                 return PTR_ERR(hdmi);
 608         priv->hdmi = hdmi;
 609
 610         err = msm_hdmi_register_audio_driver(hdmi, dev);
 611         if (err) {
 612                 DRM_ERROR("Failed to attach an audio codec %d\n", err);
 613                 hdmi->audio_pdev = NULL;
 614         }
 615
 616         return 0;
 617 }
 618
 619 static void msm_hdmi_unbind(struct device *dev, struct device *master,
 620                 void *data)
 621 {
 622         struct drm_device *drm = dev_get_drvdata(master);
 623         struct msm_drm_private *priv = drm->dev_private;
 624         if (priv->hdmi) {
 625                 if (priv->hdmi->audio_pdev)
 626                         platform_device_unregister(priv->hdmi->audio_pdev);
 627
 628                 msm_hdmi_destroy(priv->hdmi);
 629                 priv->hdmi = NULL;
 630         }
 631 }
 632
 633 static const struct component_ops msm_hdmi_ops = {
 634                 .bind   = msm_hdmi_bind,
 635                 .unbind = msm_hdmi_unbind,
 636 };
 637
 638 static int msm_hdmi_dev_probe(struct platform_device *pdev)
 639 {
 640         return component_add(&pdev->dev, &msm_hdmi_ops);
 641 }
 642
 643 static int msm_hdmi_dev_remove(struct platform_device *pdev)
 644 {
 645         component_del(&pdev->dev, &msm_hdmi_ops);
 646         return 0;
 647 }
 648
 649 static const struct of_device_id msm_hdmi_dt_match[] = {
 650         { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8996_config },
 651         { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8994_config },
 652         { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8084_config },
 653         { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
 654         { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
 655         { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8660_config },
 656         {}
 657 };
 658
 659 static struct platform_driver msm_hdmi_driver = {
 660         .probe = msm_hdmi_dev_probe,
 661         .remove = msm_hdmi_dev_remove,
 662         .driver = {
 663                 .name = "hdmi_msm",
 664                 .of_match_table = msm_hdmi_dt_match,
 665         },
 666 };
 667
 668 void __init msm_hdmi_register(void)
 669 {
 670         msm_hdmi_phy_driver_register();
 671         platform_driver_register(&msm_hdmi_driver);
 672 }
 673
 674 void __exit msm_hdmi_unregister(void)
 675 {
 676         platform_driver_unregister(&msm_hdmi_driver);
 677         msm_hdmi_phy_driver_unregister();
 678 }