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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
   4  * Copyright (C) 2013 Red Hat
   5  * Author: Rob Clark <[email protected]>
   6  */
   7
   8 #include <linux/gpio/consumer.h>
   9 #include <linux/of_irq.h>
  10 #include <linux/of_platform.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <drm/drm_bridge_connector.h>
  14 #include <drm/drm_of.h>
  15
  16 #include <sound/hdmi-codec.h>
  17 #include "hdmi.h"
  18
  19 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
  20 {
  21         uint32_t ctrl = 0;
  22         unsigned long flags;
  23
  24         spin_lock_irqsave(&hdmi->reg_lock, flags);
  25         if (power_on) {
  26                 ctrl |= HDMI_CTRL_ENABLE;
  27                 if (!hdmi->hdmi_mode) {
  28                         ctrl |= HDMI_CTRL_HDMI;
  29                         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  30                         ctrl &= ~HDMI_CTRL_HDMI;
  31                 } else {
  32                         ctrl |= HDMI_CTRL_HDMI;
  33                 }
  34         } else {
  35                 ctrl = HDMI_CTRL_HDMI;
  36         }
  37
  38         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  39         spin_unlock_irqrestore(&hdmi->reg_lock, flags);
  40         DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
  41                         power_on ? "Enable" : "Disable", ctrl);
  42 }
  43
  44 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
  45 {
  46         struct hdmi *hdmi = dev_id;
  47
  48         /* Process HPD: */
  49         msm_hdmi_hpd_irq(hdmi->bridge);
  50
  51         /* Process DDC: */
  52         msm_hdmi_i2c_irq(hdmi->i2c);
  53
  54         /* Process HDCP: */
  55         if (hdmi->hdcp_ctrl)
  56                 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
  57
  58         /* TODO audio.. */
  59
  60         return IRQ_HANDLED;
  61 }
  62
  63 static void msm_hdmi_destroy(struct hdmi *hdmi)
  64 {
  65         /*
  66          * at this point, hpd has been disabled,
  67          * after flush workq, it's safe to deinit hdcp
  68          */
  69         if (hdmi->workq)
  70                 destroy_workqueue(hdmi->workq);
  71         msm_hdmi_hdcp_destroy(hdmi);
  72
  73         if (hdmi->i2c)
  74                 msm_hdmi_i2c_destroy(hdmi->i2c);
  75 }
  76
  77 static void msm_hdmi_put_phy(struct hdmi *hdmi)
  78 {
  79         if (hdmi->phy_dev) {
  80                 put_device(hdmi->phy_dev);
  81                 hdmi->phy = NULL;
  82                 hdmi->phy_dev = NULL;
  83         }
  84 }
  85
  86 static int msm_hdmi_get_phy(struct hdmi *hdmi)
  87 {
  88         struct platform_device *pdev = hdmi->pdev;
  89         struct platform_device *phy_pdev;
  90         struct device_node *phy_node;
  91
  92         phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
  93         if (!phy_node) {
  94                 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
  95                 return -ENXIO;
  96         }
  97
  98         phy_pdev = of_find_device_by_node(phy_node);
  99         of_node_put(phy_node);
 100
 101         if (!phy_pdev)
 102                 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
 103
 104         hdmi->phy = platform_get_drvdata(phy_pdev);
 105         if (!hdmi->phy) {
 106                 put_device(&phy_pdev->dev);
 107                 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n");
 108         }
 109
 110         hdmi->phy_dev = &phy_pdev->dev;
 111
 112         return 0;
 113 }
 114
 115 /* construct hdmi at bind/probe time, grab all the resources.  If
 116  * we are to EPROBE_DEFER we want to do it here, rather than later
 117  * at modeset_init() time
 118  */
 119 static int msm_hdmi_init(struct hdmi *hdmi)
 120 {
 121         struct platform_device *pdev = hdmi->pdev;
 122         int ret;
 123
 124         hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
 125         if (!hdmi->workq) {
 126                 ret = -ENOMEM;
 127                 goto fail;
 128         }
 129
 130         hdmi->i2c = msm_hdmi_i2c_init(hdmi);
 131         if (IS_ERR(hdmi->i2c)) {
 132                 ret = PTR_ERR(hdmi->i2c);
 133                 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret);
 134                 hdmi->i2c = NULL;
 135                 goto fail;
 136         }
 137
 138         hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
 139         if (IS_ERR(hdmi->hdcp_ctrl)) {
 140                 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
 141                 hdmi->hdcp_ctrl = NULL;
 142         }
 143
 144         return 0;
 145
 146 fail:
 147         msm_hdmi_destroy(hdmi);
 148
 149         return ret;
 150 }
 151
 152 /* Second part of initialization, the drm/kms level modeset_init,
 153  * constructs/initializes mode objects, etc, is called from master
 154  * driver (not hdmi sub-device's probe/bind!)
 155  *
 156  * Any resource (regulator/clk/etc) which could be missing at boot
 157  * should be handled in msm_hdmi_init() so that failure happens from
 158  * hdmi sub-device's probe.
 159  */
 160 int msm_hdmi_modeset_init(struct hdmi *hdmi,
 161                 struct drm_device *dev, struct drm_encoder *encoder)
 162 {
 163         int ret;
 164
 165         hdmi->dev = dev;
 166         hdmi->encoder = encoder;
 167
 168         hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
 169
 170         ret = msm_hdmi_bridge_init(hdmi);
 171         if (ret) {
 172                 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret);
 173                 goto fail;
 174         }
 175
 176         if (hdmi->next_bridge) {
 177                 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge,
 178                                         DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 179                 if (ret) {
 180                         DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret);
 181                         goto fail;
 182                 }
 183         }
 184
 185         hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder);
 186         if (IS_ERR(hdmi->connector)) {
 187                 ret = PTR_ERR(hdmi->connector);
 188                 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret);
 189                 hdmi->connector = NULL;
 190                 goto fail;
 191         }
 192
 193         drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
 194
 195         ret = devm_request_irq(dev->dev, hdmi->irq,
 196                         msm_hdmi_irq, IRQF_TRIGGER_HIGH,
 197                         "hdmi_isr", hdmi);
 198         if (ret < 0) {
 199                 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n",
 200                                 hdmi->irq, ret);
 201                 goto fail;
 202         }
 203
 204         ret = msm_hdmi_hpd_enable(hdmi->bridge);
 205         if (ret < 0) {
 206                 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
 207                 goto fail;
 208         }
 209
 210         return 0;
 211
 212 fail:
 213         if (hdmi->connector) {
 214                 hdmi->connector->funcs->destroy(hdmi->connector);
 215                 hdmi->connector = NULL;
 216         }
 217
 218         return ret;
 219 }
 220
 221 /*
 222  * The hdmi device:
 223  */
 224
 225 #define HDMI_CFG(item, entry) \
 226         .item ## _names = item ##_names_ ## entry, \
 227         .item ## _cnt   = ARRAY_SIZE(item ## _names_ ## entry)
 228
 229 static const char *hpd_reg_names_8960[] = {"core-vdda"};
 230 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"};
 231
 232 static const struct hdmi_platform_config hdmi_tx_8960_config = {
 233                 HDMI_CFG(hpd_reg, 8960),
 234                 HDMI_CFG(hpd_clk, 8960),
 235 };
 236
 237 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
 238 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
 239 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
 240 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
 241
 242 static const struct hdmi_platform_config hdmi_tx_8974_config = {
 243                 HDMI_CFG(pwr_reg, 8x74),
 244                 HDMI_CFG(pwr_clk, 8x74),
 245                 HDMI_CFG(hpd_clk, 8x74),
 246                 .hpd_freq      = hpd_clk_freq_8x74,
 247 };
 248
 249 /*
 250  * HDMI audio codec callbacks
 251  */
 252 static int msm_hdmi_audio_hw_params(struct device *dev, void *data,
 253                                     struct hdmi_codec_daifmt *daifmt,
 254                                     struct hdmi_codec_params *params)
 255 {
 256         struct hdmi *hdmi = dev_get_drvdata(dev);
 257         unsigned int chan;
 258         unsigned int channel_allocation = 0;
 259         unsigned int rate;
 260         unsigned int level_shift  = 0; /* 0dB */
 261         bool down_mix = false;
 262
 263         DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate,
 264                  params->sample_width, params->cea.channels);
 265
 266         switch (params->cea.channels) {
 267         case 2:
 268                 /* FR and FL speakers */
 269                 channel_allocation  = 0;
 270                 chan = MSM_HDMI_AUDIO_CHANNEL_2;
 271                 break;
 272         case 4:
 273                 /* FC, LFE, FR and FL speakers */
 274                 channel_allocation  = 0x3;
 275                 chan = MSM_HDMI_AUDIO_CHANNEL_4;
 276                 break;
 277         case 6:
 278                 /* RR, RL, FC, LFE, FR and FL speakers */
 279                 channel_allocation  = 0x0B;
 280                 chan = MSM_HDMI_AUDIO_CHANNEL_6;
 281                 break;
 282         case 8:
 283                 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */
 284                 channel_allocation  = 0x1F;
 285                 chan = MSM_HDMI_AUDIO_CHANNEL_8;
 286                 break;
 287         default:
 288                 return -EINVAL;
 289         }
 290
 291         switch (params->sample_rate) {
 292         case 32000:
 293                 rate = HDMI_SAMPLE_RATE_32KHZ;
 294                 break;
 295         case 44100:
 296                 rate = HDMI_SAMPLE_RATE_44_1KHZ;
 297                 break;
 298         case 48000:
 299                 rate = HDMI_SAMPLE_RATE_48KHZ;
 300                 break;
 301         case 88200:
 302                 rate = HDMI_SAMPLE_RATE_88_2KHZ;
 303                 break;
 304         case 96000:
 305                 rate = HDMI_SAMPLE_RATE_96KHZ;
 306                 break;
 307         case 176400:
 308                 rate = HDMI_SAMPLE_RATE_176_4KHZ;
 309                 break;
 310         case 192000:
 311                 rate = HDMI_SAMPLE_RATE_192KHZ;
 312                 break;
 313         default:
 314                 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n",
 315                         params->sample_rate);
 316                 return -EINVAL;
 317         }
 318
 319         msm_hdmi_audio_set_sample_rate(hdmi, rate);
 320         msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation,
 321                               level_shift, down_mix);
 322
 323         return 0;
 324 }
 325
 326 static void msm_hdmi_audio_shutdown(struct device *dev, void *data)
 327 {
 328         struct hdmi *hdmi = dev_get_drvdata(dev);
 329
 330         msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0);
 331 }
 332
 333 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = {
 334         .hw_params = msm_hdmi_audio_hw_params,
 335         .audio_shutdown = msm_hdmi_audio_shutdown,
 336 };
 337
 338 static struct hdmi_codec_pdata codec_data = {
 339         .ops = &msm_hdmi_audio_codec_ops,
 340         .max_i2s_channels = 8,
 341         .i2s = 1,
 342 };
 343
 344 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev)
 345 {
 346         hdmi->audio_pdev = platform_device_register_data(dev,
 347                                                          HDMI_CODEC_DRV_NAME,
 348                                                          PLATFORM_DEVID_AUTO,
 349                                                          &codec_data,
 350                                                          sizeof(codec_data));
 351         return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
 352 }
 353
 354 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
 355 {
 356         struct msm_drm_private *priv = dev_get_drvdata(master);
 357         struct hdmi *hdmi = dev_get_drvdata(dev);
 358         int err;
 359
 360         err = msm_hdmi_init(hdmi);
 361         if (err)
 362                 return err;
 363         priv->hdmi = hdmi;
 364
 365         err = msm_hdmi_register_audio_driver(hdmi, dev);
 366         if (err) {
 367                 DRM_ERROR("Failed to attach an audio codec %d\n", err);
 368                 hdmi->audio_pdev = NULL;
 369         }
 370
 371         return 0;
 372 }
 373
 374 static void msm_hdmi_unbind(struct device *dev, struct device *master,
 375                 void *data)
 376 {
 377         struct msm_drm_private *priv = dev_get_drvdata(master);
 378
 379         if (priv->hdmi) {
 380                 if (priv->hdmi->audio_pdev)
 381                         platform_device_unregister(priv->hdmi->audio_pdev);
 382
 383                 if (priv->hdmi->bridge)
 384                         msm_hdmi_hpd_disable(priv->hdmi);
 385
 386                 msm_hdmi_destroy(priv->hdmi);
 387                 priv->hdmi = NULL;
 388         }
 389 }
 390
 391 static const struct component_ops msm_hdmi_ops = {
 392                 .bind   = msm_hdmi_bind,
 393                 .unbind = msm_hdmi_unbind,
 394 };
 395
 396 static int msm_hdmi_dev_probe(struct platform_device *pdev)
 397 {
 398         const struct hdmi_platform_config *config;
 399         struct device *dev = &pdev->dev;
 400         struct hdmi *hdmi;
 401         struct resource *res;
 402         int i, ret;
 403
 404         config = of_device_get_match_data(dev);
 405         if (!config)
 406                 return -EINVAL;
 407
 408         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 409         if (!hdmi)
 410                 return -ENOMEM;
 411
 412         hdmi->pdev = pdev;
 413         hdmi->config = config;
 414         spin_lock_init(&hdmi->reg_lock);
 415
 416         ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge);
 417         if (ret && ret != -ENODEV)
 418                 return ret;
 419
 420         hdmi->mmio = msm_ioremap(pdev, "core_physical");
 421         if (IS_ERR(hdmi->mmio))
 422                 return PTR_ERR(hdmi->mmio);
 423
 424         /* HDCP needs physical address of hdmi register */
 425         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 426                 "core_physical");
 427         if (!res)
 428                 return -EINVAL;
 429         hdmi->mmio_phy_addr = res->start;
 430
 431         hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical");
 432         if (IS_ERR(hdmi->qfprom_mmio)) {
 433                 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n");
 434                 hdmi->qfprom_mmio = NULL;
 435         }
 436
 437         hdmi->irq = platform_get_irq(pdev, 0);
 438         if (hdmi->irq < 0)
 439                 return hdmi->irq;
 440
 441         hdmi->hpd_regs = devm_kcalloc(&pdev->dev,
 442                                       config->hpd_reg_cnt,
 443                                       sizeof(hdmi->hpd_regs[0]),
 444                                       GFP_KERNEL);
 445         if (!hdmi->hpd_regs)
 446                 return -ENOMEM;
 447
 448         for (i = 0; i < config->hpd_reg_cnt; i++)
 449                 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i];
 450
 451         ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs);
 452         if (ret)
 453                 return dev_err_probe(dev, ret, "failed to get hpd regulators\n");
 454
 455         hdmi->pwr_regs = devm_kcalloc(&pdev->dev,
 456                                       config->pwr_reg_cnt,
 457                                       sizeof(hdmi->pwr_regs[0]),
 458                                       GFP_KERNEL);
 459         if (!hdmi->pwr_regs)
 460                 return -ENOMEM;
 461
 462         for (i = 0; i < config->pwr_reg_cnt; i++)
 463                 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i];
 464
 465         ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs);
 466         if (ret)
 467                 return dev_err_probe(dev, ret, "failed to get pwr regulators\n");
 468
 469         hdmi->hpd_clks = devm_kcalloc(&pdev->dev,
 470                                       config->hpd_clk_cnt,
 471                                       sizeof(hdmi->hpd_clks[0]),
 472                                       GFP_KERNEL);
 473         if (!hdmi->hpd_clks)
 474                 return -ENOMEM;
 475
 476         for (i = 0; i < config->hpd_clk_cnt; i++) {
 477                 struct clk *clk;
 478
 479                 clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
 480                 if (IS_ERR(clk))
 481                         return dev_err_probe(dev, PTR_ERR(clk),
 482                                              "failed to get hpd clk: %s\n",
 483                                              config->hpd_clk_names[i]);
 484
 485                 hdmi->hpd_clks[i] = clk;
 486         }
 487
 488         hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
 489                                       config->pwr_clk_cnt,
 490                                       sizeof(hdmi->pwr_clks[0]),
 491                                       GFP_KERNEL);
 492         if (!hdmi->pwr_clks)
 493                 return -ENOMEM;
 494
 495         for (i = 0; i < config->pwr_clk_cnt; i++) {
 496                 struct clk *clk;
 497
 498                 clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
 499                 if (IS_ERR(clk))
 500                         return dev_err_probe(dev, PTR_ERR(clk),
 501                                              "failed to get pwr clk: %s\n",
 502                                              config->pwr_clk_names[i]);
 503
 504                 hdmi->pwr_clks[i] = clk;
 505         }
 506
 507         hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
 508         /* This will catch e.g. -EPROBE_DEFER */
 509         if (IS_ERR(hdmi->hpd_gpiod))
 510                 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod),
 511                                      "failed to get hpd gpio\n");
 512
 513         if (!hdmi->hpd_gpiod)
 514                 DBG("failed to get HPD gpio");
 515
 516         if (hdmi->hpd_gpiod)
 517                 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD");
 518
 519         ret = msm_hdmi_get_phy(hdmi);
 520         if (ret) {
 521                 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n");
 522                 return ret;
 523         }
 524
 525         ret = devm_pm_runtime_enable(&pdev->dev);
 526         if (ret)
 527                 goto err_put_phy;
 528
 529         platform_set_drvdata(pdev, hdmi);
 530
 531         ret = component_add(&pdev->dev, &msm_hdmi_ops);
 532         if (ret)
 533                 goto err_put_phy;
 534
 535         return 0;
 536
 537 err_put_phy:
 538         msm_hdmi_put_phy(hdmi);
 539         return ret;
 540 }
 541
 542 static void msm_hdmi_dev_remove(struct platform_device *pdev)
 543 {
 544         struct hdmi *hdmi = dev_get_drvdata(&pdev->dev);
 545
 546         component_del(&pdev->dev, &msm_hdmi_ops);
 547
 548         msm_hdmi_put_phy(hdmi);
 549 }
 550
 551 static const struct of_device_id msm_hdmi_dt_match[] = {
 552         { .compatible = "qcom,hdmi-tx-8998", .data = &hdmi_tx_8974_config },
 553         { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config },
 554         { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config },
 555         { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config },
 556         { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
 557         { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
 558         { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config },
 559         {}
 560 };
 561
 562 static struct platform_driver msm_hdmi_driver = {
 563         .probe = msm_hdmi_dev_probe,
 564         .remove = msm_hdmi_dev_remove,
 565         .driver = {
 566                 .name = "hdmi_msm",
 567                 .of_match_table = msm_hdmi_dt_match,
 568         },
 569 };
 570
 571 void __init msm_hdmi_register(void)
 572 {
 573         msm_hdmi_phy_driver_register();
 574         platform_driver_register(&msm_hdmi_driver);
 575 }
 576
 577 void __exit msm_hdmi_unregister(void)
 578 {
 579         platform_driver_unregister(&msm_hdmi_driver);
 580         msm_hdmi_phy_driver_unregister();
 581 }