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 "hdmi.h"
  23
  24 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on)
  25 {
  26         uint32_t ctrl = 0;
  27         unsigned long flags;
  28
  29         spin_lock_irqsave(&hdmi->reg_lock, flags);
  30         if (power_on) {
  31                 ctrl |= HDMI_CTRL_ENABLE;
  32                 if (!hdmi->hdmi_mode) {
  33                         ctrl |= HDMI_CTRL_HDMI;
  34                         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  35                         ctrl &= ~HDMI_CTRL_HDMI;
  36                 } else {
  37                         ctrl |= HDMI_CTRL_HDMI;
  38                 }
  39         } else {
  40                 ctrl = HDMI_CTRL_HDMI;
  41         }
  42
  43         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  44         spin_unlock_irqrestore(&hdmi->reg_lock, flags);
  45         DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
  46                         power_on ? "Enable" : "Disable", ctrl);
  47 }
  48
  49 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)
  50 {
  51         struct hdmi *hdmi = dev_id;
  52
  53         /* Process HPD: */
  54         msm_hdmi_connector_irq(hdmi->connector);
  55
  56         /* Process DDC: */
  57         msm_hdmi_i2c_irq(hdmi->i2c);
  58
  59         /* Process HDCP: */
  60         if (hdmi->hdcp_ctrl)
  61                 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl);
  62
  63         /* TODO audio.. */
  64
  65         return IRQ_HANDLED;
  66 }
  67
  68 static void msm_hdmi_destroy(struct hdmi *hdmi)
  69 {
  70         /*
  71          * at this point, hpd has been disabled,
  72          * after flush workq, it's safe to deinit hdcp
  73          */
  74         if (hdmi->workq) {
  75                 flush_workqueue(hdmi->workq);
  76                 destroy_workqueue(hdmi->workq);
  77         }
  78         msm_hdmi_hdcp_destroy(hdmi);
  79
  80         if (hdmi->phy_dev) {
  81                 put_device(hdmi->phy_dev);
  82                 hdmi->phy = NULL;
  83                 hdmi->phy_dev = NULL;
  84         }
  85
  86         if (hdmi->i2c)
  87                 msm_hdmi_i2c_destroy(hdmi->i2c);
  88
  89         platform_set_drvdata(hdmi->pdev, NULL);
  90 }
  91
  92 static int msm_hdmi_get_phy(struct hdmi *hdmi)
  93 {
  94         struct platform_device *pdev = hdmi->pdev;
  95         struct platform_device *phy_pdev;
  96         struct device_node *phy_node;
  97
  98         phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
  99         if (!phy_node) {
 100                 dev_err(&pdev->dev, "cannot find phy device\n");
 101                 return -ENXIO;
 102         }
 103
 104         phy_pdev = of_find_device_by_node(phy_node);
 105         if (phy_pdev)
 106                 hdmi->phy = platform_get_drvdata(phy_pdev);
 107
 108         of_node_put(phy_node);
 109
 110         if (!phy_pdev || !hdmi->phy) {
 111                 dev_err(&pdev->dev, "phy driver is not ready\n");
 112                 return -EPROBE_DEFER;
 113         }
 114
 115         hdmi->phy_dev = get_device(&phy_pdev->dev);
 116
 117         return 0;
 118 }
 119
 120 /* construct hdmi at bind/probe time, grab all the resources.  If
 121  * we are to EPROBE_DEFER we want to do it here, rather than later
 122  * at modeset_init() time
 123  */
 124 static struct hdmi *msm_hdmi_init(struct platform_device *pdev)
 125 {
 126         struct hdmi_platform_config *config = pdev->dev.platform_data;
 127         struct hdmi *hdmi = NULL;
 128         struct resource *res;
 129         int i, ret;
 130
 131         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 132         if (!hdmi) {
 133                 ret = -ENOMEM;
 134                 goto fail;
 135         }
 136
 137         hdmi->pdev = pdev;
 138         hdmi->config = config;
 139         spin_lock_init(&hdmi->reg_lock);
 140
 141         hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI");
 142         if (IS_ERR(hdmi->mmio)) {
 143                 ret = PTR_ERR(hdmi->mmio);
 144                 goto fail;
 145         }
 146
 147         /* HDCP needs physical address of hdmi register */
 148         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 149                 config->mmio_name);
 150         hdmi->mmio_phy_addr = res->start;
 151
 152         hdmi->qfprom_mmio = msm_ioremap(pdev,
 153                 config->qfprom_mmio_name, "HDMI_QFPROM");
 154         if (IS_ERR(hdmi->qfprom_mmio)) {
 155                 dev_info(&pdev->dev, "can't find qfprom resource\n");
 156                 hdmi->qfprom_mmio = NULL;
 157         }
 158
 159         hdmi->hpd_regs = devm_kzalloc(&pdev->dev, sizeof(hdmi->hpd_regs[0]) *
 160                         config->hpd_reg_cnt, GFP_KERNEL);
 161         if (!hdmi->hpd_regs) {
 162                 ret = -ENOMEM;
 163                 goto fail;
 164         }
 165         for (i = 0; i < config->hpd_reg_cnt; i++) {
 166                 struct regulator *reg;
 167
 168                 reg = devm_regulator_get(&pdev->dev,
 169                                 config->hpd_reg_names[i]);
 170                 if (IS_ERR(reg)) {
 171                         ret = PTR_ERR(reg);
 172                         dev_err(&pdev->dev, "failed to get hpd regulator: %s (%d)\n",
 173                                         config->hpd_reg_names[i], ret);
 174                         goto fail;
 175                 }
 176
 177                 hdmi->hpd_regs[i] = reg;
 178         }
 179
 180         hdmi->pwr_regs = devm_kzalloc(&pdev->dev, sizeof(hdmi->pwr_regs[0]) *
 181                         config->pwr_reg_cnt, GFP_KERNEL);
 182         if (!hdmi->pwr_regs) {
 183                 ret = -ENOMEM;
 184                 goto fail;
 185         }
 186         for (i = 0; i < config->pwr_reg_cnt; i++) {
 187                 struct regulator *reg;
 188
 189                 reg = devm_regulator_get(&pdev->dev,
 190                                 config->pwr_reg_names[i]);
 191                 if (IS_ERR(reg)) {
 192                         ret = PTR_ERR(reg);
 193                         dev_err(&pdev->dev, "failed to get pwr regulator: %s (%d)\n",
 194                                         config->pwr_reg_names[i], ret);
 195                         goto fail;
 196                 }
 197
 198                 hdmi->pwr_regs[i] = reg;
 199         }
 200
 201         hdmi->hpd_clks = devm_kzalloc(&pdev->dev, sizeof(hdmi->hpd_clks[0]) *
 202                         config->hpd_clk_cnt, GFP_KERNEL);
 203         if (!hdmi->hpd_clks) {
 204                 ret = -ENOMEM;
 205                 goto fail;
 206         }
 207         for (i = 0; i < config->hpd_clk_cnt; i++) {
 208                 struct clk *clk;
 209
 210                 clk = devm_clk_get(&pdev->dev, config->hpd_clk_names[i]);
 211                 if (IS_ERR(clk)) {
 212                         ret = PTR_ERR(clk);
 213                         dev_err(&pdev->dev, "failed to get hpd clk: %s (%d)\n",
 214                                         config->hpd_clk_names[i], ret);
 215                         goto fail;
 216                 }
 217
 218                 hdmi->hpd_clks[i] = clk;
 219         }
 220
 221         hdmi->pwr_clks = devm_kzalloc(&pdev->dev, sizeof(hdmi->pwr_clks[0]) *
 222                         config->pwr_clk_cnt, GFP_KERNEL);
 223         if (!hdmi->pwr_clks) {
 224                 ret = -ENOMEM;
 225                 goto fail;
 226         }
 227         for (i = 0; i < config->pwr_clk_cnt; i++) {
 228                 struct clk *clk;
 229
 230                 clk = devm_clk_get(&pdev->dev, config->pwr_clk_names[i]);
 231                 if (IS_ERR(clk)) {
 232                         ret = PTR_ERR(clk);
 233                         dev_err(&pdev->dev, "failed to get pwr clk: %s (%d)\n",
 234                                         config->pwr_clk_names[i], ret);
 235                         goto fail;
 236                 }
 237
 238                 hdmi->pwr_clks[i] = clk;
 239         }
 240
 241         hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
 242
 243         hdmi->i2c = msm_hdmi_i2c_init(hdmi);
 244         if (IS_ERR(hdmi->i2c)) {
 245                 ret = PTR_ERR(hdmi->i2c);
 246                 dev_err(&pdev->dev, "failed to get i2c: %d\n", ret);
 247                 hdmi->i2c = NULL;
 248                 goto fail;
 249         }
 250
 251         ret = msm_hdmi_get_phy(hdmi);
 252         if (ret) {
 253                 dev_err(&pdev->dev, "failed to get phy\n");
 254                 goto fail;
 255         }
 256
 257         hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi);
 258         if (IS_ERR(hdmi->hdcp_ctrl)) {
 259                 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
 260                 hdmi->hdcp_ctrl = NULL;
 261         }
 262
 263         return hdmi;
 264
 265 fail:
 266         if (hdmi)
 267                 msm_hdmi_destroy(hdmi);
 268
 269         return ERR_PTR(ret);
 270 }
 271
 272 /* Second part of initialization, the drm/kms level modeset_init,
 273  * constructs/initializes mode objects, etc, is called from master
 274  * driver (not hdmi sub-device's probe/bind!)
 275  *
 276  * Any resource (regulator/clk/etc) which could be missing at boot
 277  * should be handled in msm_hdmi_init() so that failure happens from
 278  * hdmi sub-device's probe.
 279  */
 280 int msm_hdmi_modeset_init(struct hdmi *hdmi,
 281                 struct drm_device *dev, struct drm_encoder *encoder)
 282 {
 283         struct msm_drm_private *priv = dev->dev_private;
 284         struct platform_device *pdev = hdmi->pdev;
 285         int ret;
 286
 287         hdmi->dev = dev;
 288         hdmi->encoder = encoder;
 289
 290         hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
 291
 292         hdmi->bridge = msm_hdmi_bridge_init(hdmi);
 293         if (IS_ERR(hdmi->bridge)) {
 294                 ret = PTR_ERR(hdmi->bridge);
 295                 dev_err(dev->dev, "failed to create HDMI bridge: %d\n", ret);
 296                 hdmi->bridge = NULL;
 297                 goto fail;
 298         }
 299
 300         hdmi->connector = msm_hdmi_connector_init(hdmi);
 301         if (IS_ERR(hdmi->connector)) {
 302                 ret = PTR_ERR(hdmi->connector);
 303                 dev_err(dev->dev, "failed to create HDMI connector: %d\n", ret);
 304                 hdmi->connector = NULL;
 305                 goto fail;
 306         }
 307
 308         hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 309         if (hdmi->irq < 0) {
 310                 ret = hdmi->irq;
 311                 dev_err(dev->dev, "failed to get irq: %d\n", ret);
 312                 goto fail;
 313         }
 314
 315         ret = devm_request_irq(&pdev->dev, hdmi->irq,
 316                         msm_hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 317                         "hdmi_isr", hdmi);
 318         if (ret < 0) {
 319                 dev_err(dev->dev, "failed to request IRQ%u: %d\n",
 320                                 hdmi->irq, ret);
 321                 goto fail;
 322         }
 323
 324         encoder->bridge = hdmi->bridge;
 325
 326         priv->bridges[priv->num_bridges++]       = hdmi->bridge;
 327         priv->connectors[priv->num_connectors++] = hdmi->connector;
 328
 329         platform_set_drvdata(pdev, hdmi);
 330
 331         return 0;
 332
 333 fail:
 334         /* bridge is normally destroyed by drm: */
 335         if (hdmi->bridge) {
 336                 msm_hdmi_bridge_destroy(hdmi->bridge);
 337                 hdmi->bridge = NULL;
 338         }
 339         if (hdmi->connector) {
 340                 hdmi->connector->funcs->destroy(hdmi->connector);
 341                 hdmi->connector = NULL;
 342         }
 343
 344         return ret;
 345 }
 346
 347 /*
 348  * The hdmi device:
 349  */
 350
 351 #define HDMI_CFG(item, entry) \
 352         .item ## _names = item ##_names_ ## entry, \
 353         .item ## _cnt   = ARRAY_SIZE(item ## _names_ ## entry)
 354
 355 static const char *pwr_reg_names_none[] = {};
 356 static const char *hpd_reg_names_none[] = {};
 357
 358 static struct hdmi_platform_config hdmi_tx_8660_config;
 359
 360 static const char *hpd_reg_names_8960[] = {"core-vdda", "hdmi-mux"};
 361 static const char *hpd_clk_names_8960[] = {"core_clk", "master_iface_clk", "slave_iface_clk"};
 362
 363 static struct hdmi_platform_config hdmi_tx_8960_config = {
 364                 HDMI_CFG(hpd_reg, 8960),
 365                 HDMI_CFG(hpd_clk, 8960),
 366 };
 367
 368 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
 369 static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"};
 370 static const char *pwr_clk_names_8x74[] = {"extp_clk", "alt_iface_clk"};
 371 static const char *hpd_clk_names_8x74[] = {"iface_clk", "core_clk", "mdp_core_clk"};
 372 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
 373
 374 static struct hdmi_platform_config hdmi_tx_8974_config = {
 375                 HDMI_CFG(pwr_reg, 8x74),
 376                 HDMI_CFG(hpd_reg, 8x74),
 377                 HDMI_CFG(pwr_clk, 8x74),
 378                 HDMI_CFG(hpd_clk, 8x74),
 379                 .hpd_freq      = hpd_clk_freq_8x74,
 380 };
 381
 382 static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
 383
 384 static struct hdmi_platform_config hdmi_tx_8084_config = {
 385                 HDMI_CFG(pwr_reg, 8x74),
 386                 HDMI_CFG(hpd_reg, 8084),
 387                 HDMI_CFG(pwr_clk, 8x74),
 388                 HDMI_CFG(hpd_clk, 8x74),
 389                 .hpd_freq      = hpd_clk_freq_8x74,
 390 };
 391
 392 static struct hdmi_platform_config hdmi_tx_8994_config = {
 393                 HDMI_CFG(pwr_reg, 8x74),
 394                 HDMI_CFG(hpd_reg, none),
 395                 HDMI_CFG(pwr_clk, 8x74),
 396                 HDMI_CFG(hpd_clk, 8x74),
 397                 .hpd_freq      = hpd_clk_freq_8x74,
 398 };
 399
 400 static struct hdmi_platform_config hdmi_tx_8996_config = {
 401                 HDMI_CFG(pwr_reg, none),
 402                 HDMI_CFG(hpd_reg, none),
 403                 HDMI_CFG(pwr_clk, 8x74),
 404                 HDMI_CFG(hpd_clk, 8x74),
 405                 .hpd_freq      = hpd_clk_freq_8x74,
 406 };
 407
 408 static const struct {
 409         const char *name;
 410         const bool output;
 411         const int value;
 412         const char *label;
 413 } msm_hdmi_gpio_pdata[] = {
 414         { "qcom,hdmi-tx-ddc-clk", true, 1, "HDMI_DDC_CLK" },
 415         { "qcom,hdmi-tx-ddc-data", true, 1, "HDMI_DDC_DATA" },
 416         { "qcom,hdmi-tx-hpd", false, 1, "HDMI_HPD" },
 417         { "qcom,hdmi-tx-mux-en", true, 1, "HDMI_MUX_EN" },
 418         { "qcom,hdmi-tx-mux-sel", true, 0, "HDMI_MUX_SEL" },
 419         { "qcom,hdmi-tx-mux-lpm", true, 1, "HDMI_MUX_LPM" },
 420 };
 421
 422 static int msm_hdmi_get_gpio(struct device_node *of_node, const char *name)
 423 {
 424         int gpio = of_get_named_gpio(of_node, name, 0);
 425         if (gpio < 0) {
 426                 char name2[32];
 427                 snprintf(name2, sizeof(name2), "%s-gpio", name);
 428                 gpio = of_get_named_gpio(of_node, name2, 0);
 429                 if (gpio < 0) {
 430                         DBG("failed to get gpio: %s (%d)", name, gpio);
 431                         gpio = -1;
 432                 }
 433         }
 434         return gpio;
 435 }
 436
 437 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data)
 438 {
 439         struct drm_device *drm = dev_get_drvdata(master);
 440         struct msm_drm_private *priv = drm->dev_private;
 441         static struct hdmi_platform_config *hdmi_cfg;
 442         struct hdmi *hdmi;
 443         struct device_node *of_node = dev->of_node;
 444         int i;
 445
 446         hdmi_cfg = (struct hdmi_platform_config *)
 447                         of_device_get_match_data(dev);
 448         if (!hdmi_cfg) {
 449                 dev_err(dev, "unknown hdmi_cfg: %s\n", of_node->name);
 450                 return -ENXIO;
 451         }
 452
 453         hdmi_cfg->mmio_name     = "core_physical";
 454         hdmi_cfg->qfprom_mmio_name = "qfprom_physical";
 455
 456         for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
 457                 hdmi_cfg->gpios[i].num = msm_hdmi_get_gpio(of_node,
 458                                                 msm_hdmi_gpio_pdata[i].name);
 459                 hdmi_cfg->gpios[i].output = msm_hdmi_gpio_pdata[i].output;
 460                 hdmi_cfg->gpios[i].value = msm_hdmi_gpio_pdata[i].value;
 461                 hdmi_cfg->gpios[i].label = msm_hdmi_gpio_pdata[i].label;
 462         }
 463
 464         dev->platform_data = hdmi_cfg;
 465
 466         hdmi = msm_hdmi_init(to_platform_device(dev));
 467         if (IS_ERR(hdmi))
 468                 return PTR_ERR(hdmi);
 469         priv->hdmi = hdmi;
 470
 471         return 0;
 472 }
 473
 474 static void msm_hdmi_unbind(struct device *dev, struct device *master,
 475                 void *data)
 476 {
 477         struct drm_device *drm = dev_get_drvdata(master);
 478         struct msm_drm_private *priv = drm->dev_private;
 479         if (priv->hdmi) {
 480                 msm_hdmi_destroy(priv->hdmi);
 481                 priv->hdmi = NULL;
 482         }
 483 }
 484
 485 static const struct component_ops msm_hdmi_ops = {
 486                 .bind   = msm_hdmi_bind,
 487                 .unbind = msm_hdmi_unbind,
 488 };
 489
 490 static int msm_hdmi_dev_probe(struct platform_device *pdev)
 491 {
 492         return component_add(&pdev->dev, &msm_hdmi_ops);
 493 }
 494
 495 static int msm_hdmi_dev_remove(struct platform_device *pdev)
 496 {
 497         component_del(&pdev->dev, &msm_hdmi_ops);
 498         return 0;
 499 }
 500
 501 static const struct of_device_id msm_hdmi_dt_match[] = {
 502         { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8996_config },
 503         { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8994_config },
 504         { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8084_config },
 505         { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config },
 506         { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
 507         { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8660_config },
 508         {}
 509 };
 510
 511 static struct platform_driver msm_hdmi_driver = {
 512         .probe = msm_hdmi_dev_probe,
 513         .remove = msm_hdmi_dev_remove,
 514         .driver = {
 515                 .name = "hdmi_msm",
 516                 .of_match_table = msm_hdmi_dt_match,
 517         },
 518 };
 519
 520 void __init msm_hdmi_register(void)
 521 {
 522         msm_hdmi_phy_driver_register();
 523         platform_driver_register(&msm_hdmi_driver);
 524 }
 525
 526 void __exit msm_hdmi_unregister(void)
 527 {
 528         platform_driver_unregister(&msm_hdmi_driver);
 529         msm_hdmi_phy_driver_unregister();
 530 }