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

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "hdmi.h"
  19
  20 void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
  21 {
  22         uint32_t ctrl = 0;
  23
  24         if (power_on) {
  25                 ctrl |= HDMI_CTRL_ENABLE;
  26                 if (!hdmi->hdmi_mode) {
  27                         ctrl |= HDMI_CTRL_HDMI;
  28                         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  29                         ctrl &= ~HDMI_CTRL_HDMI;
  30                 } else {
  31                         ctrl |= HDMI_CTRL_HDMI;
  32                 }
  33         } else {
  34                 ctrl = HDMI_CTRL_HDMI;
  35         }
  36
  37         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  38         DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
  39                         power_on ? "Enable" : "Disable", ctrl);
  40 }
  41
  42 irqreturn_t hdmi_irq(int irq, void *dev_id)
  43 {
  44         struct hdmi *hdmi = dev_id;
  45
  46         /* Process HPD: */
  47         hdmi_connector_irq(hdmi->connector);
  48
  49         /* Process DDC: */
  50         hdmi_i2c_irq(hdmi->i2c);
  51
  52         /* TODO audio.. */
  53
  54         return IRQ_HANDLED;
  55 }
  56
  57 void hdmi_destroy(struct kref *kref)
  58 {
  59         struct hdmi *hdmi = container_of(kref, struct hdmi, refcount);
  60         struct hdmi_phy *phy = hdmi->phy;
  61
  62         if (phy)
  63                 phy->funcs->destroy(phy);
  64
  65         if (hdmi->i2c)
  66                 hdmi_i2c_destroy(hdmi->i2c);
  67
  68         platform_set_drvdata(hdmi->pdev, NULL);
  69 }
  70
  71 /* initialize connector */
  72 struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
  73 {
  74         struct hdmi *hdmi = NULL;
  75         struct msm_drm_private *priv = dev->dev_private;
  76         struct platform_device *pdev = priv->hdmi_pdev;
  77         struct hdmi_platform_config *config;
  78         int i, ret;
  79
  80         if (!pdev) {
  81                 dev_err(dev->dev, "no hdmi device\n");
  82                 ret = -ENXIO;
  83                 goto fail;
  84         }
  85
  86         config = pdev->dev.platform_data;
  87
  88         hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL);
  89         if (!hdmi) {
  90                 ret = -ENOMEM;
  91                 goto fail;
  92         }
  93
  94         kref_init(&hdmi->refcount);
  95
  96         hdmi->dev = dev;
  97         hdmi->pdev = pdev;
  98         hdmi->config = config;
  99         hdmi->encoder = encoder;
 100
 101         hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
 102
 103         /* not sure about which phy maps to which msm.. probably I miss some */
 104         if (config->phy_init)
 105                 hdmi->phy = config->phy_init(hdmi);
 106         else
 107                 hdmi->phy = ERR_PTR(-ENXIO);
 108
 109         if (IS_ERR(hdmi->phy)) {
 110                 ret = PTR_ERR(hdmi->phy);
 111                 dev_err(dev->dev, "failed to load phy: %d\n", ret);
 112                 hdmi->phy = NULL;
 113                 goto fail;
 114         }
 115
 116         hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI");
 117         if (IS_ERR(hdmi->mmio)) {
 118                 ret = PTR_ERR(hdmi->mmio);
 119                 goto fail;
 120         }
 121
 122         BUG_ON(config->hpd_reg_cnt > ARRAY_SIZE(hdmi->hpd_regs));
 123         for (i = 0; i < config->hpd_reg_cnt; i++) {
 124                 struct regulator *reg;
 125
 126                 reg = devm_regulator_get_exclusive(&pdev->dev,
 127                                 config->hpd_reg_names[i]);
 128                 if (IS_ERR(reg)) {
 129                         ret = PTR_ERR(reg);
 130                         dev_err(dev->dev, "failed to get hpd regulator: %s (%d)\n",
 131                                         config->hpd_reg_names[i], ret);
 132                         goto fail;
 133                 }
 134
 135                 hdmi->hpd_regs[i] = reg;
 136         }
 137
 138         BUG_ON(config->pwr_reg_cnt > ARRAY_SIZE(hdmi->pwr_regs));
 139         for (i = 0; i < config->pwr_reg_cnt; i++) {
 140                 struct regulator *reg;
 141
 142                 reg = devm_regulator_get_exclusive(&pdev->dev,
 143                                 config->pwr_reg_names[i]);
 144                 if (IS_ERR(reg)) {
 145                         ret = PTR_ERR(reg);
 146                         dev_err(dev->dev, "failed to get pwr regulator: %s (%d)\n",
 147                                         config->pwr_reg_names[i], ret);
 148                         goto fail;
 149                 }
 150
 151                 hdmi->pwr_regs[i] = reg;
 152         }
 153
 154         BUG_ON(config->hpd_clk_cnt > ARRAY_SIZE(hdmi->hpd_clks));
 155         for (i = 0; i < config->hpd_clk_cnt; i++) {
 156                 struct clk *clk;
 157
 158                 clk = devm_clk_get(&pdev->dev, config->hpd_clk_names[i]);
 159                 if (IS_ERR(clk)) {
 160                         ret = PTR_ERR(clk);
 161                         dev_err(dev->dev, "failed to get hpd clk: %s (%d)\n",
 162                                         config->hpd_clk_names[i], ret);
 163                         goto fail;
 164                 }
 165
 166                 hdmi->hpd_clks[i] = clk;
 167         }
 168
 169         BUG_ON(config->pwr_clk_cnt > ARRAY_SIZE(hdmi->pwr_clks));
 170         for (i = 0; i < config->pwr_clk_cnt; i++) {
 171                 struct clk *clk;
 172
 173                 clk = devm_clk_get(&pdev->dev, config->pwr_clk_names[i]);
 174                 if (IS_ERR(clk)) {
 175                         ret = PTR_ERR(clk);
 176                         dev_err(dev->dev, "failed to get pwr clk: %s (%d)\n",
 177                                         config->pwr_clk_names[i], ret);
 178                         goto fail;
 179                 }
 180
 181                 hdmi->pwr_clks[i] = clk;
 182         }
 183
 184         hdmi->i2c = hdmi_i2c_init(hdmi);
 185         if (IS_ERR(hdmi->i2c)) {
 186                 ret = PTR_ERR(hdmi->i2c);
 187                 dev_err(dev->dev, "failed to get i2c: %d\n", ret);
 188                 hdmi->i2c = NULL;
 189                 goto fail;
 190         }
 191
 192         hdmi->bridge = hdmi_bridge_init(hdmi);
 193         if (IS_ERR(hdmi->bridge)) {
 194                 ret = PTR_ERR(hdmi->bridge);
 195                 dev_err(dev->dev, "failed to create HDMI bridge: %d\n", ret);
 196                 hdmi->bridge = NULL;
 197                 goto fail;
 198         }
 199
 200         hdmi->connector = hdmi_connector_init(hdmi);
 201         if (IS_ERR(hdmi->connector)) {
 202                 ret = PTR_ERR(hdmi->connector);
 203                 dev_err(dev->dev, "failed to create HDMI connector: %d\n", ret);
 204                 hdmi->connector = NULL;
 205                 goto fail;
 206         }
 207
 208         if (!config->shared_irq) {
 209                 hdmi->irq = platform_get_irq(pdev, 0);
 210                 if (hdmi->irq < 0) {
 211                         ret = hdmi->irq;
 212                         dev_err(dev->dev, "failed to get irq: %d\n", ret);
 213                         goto fail;
 214                 }
 215
 216                 ret = devm_request_threaded_irq(&pdev->dev, hdmi->irq,
 217                                 NULL, hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 218                                 "hdmi_isr", hdmi);
 219                 if (ret < 0) {
 220                         dev_err(dev->dev, "failed to request IRQ%u: %d\n",
 221                                         hdmi->irq, ret);
 222                         goto fail;
 223                 }
 224         }
 225
 226         encoder->bridge = hdmi->bridge;
 227
 228         priv->bridges[priv->num_bridges++]       = hdmi->bridge;
 229         priv->connectors[priv->num_connectors++] = hdmi->connector;
 230
 231         platform_set_drvdata(pdev, hdmi);
 232
 233         return hdmi;
 234
 235 fail:
 236         if (hdmi) {
 237                 /* bridge/connector are normally destroyed by drm: */
 238                 if (hdmi->bridge)
 239                         hdmi->bridge->funcs->destroy(hdmi->bridge);
 240                 if (hdmi->connector)
 241                         hdmi->connector->funcs->destroy(hdmi->connector);
 242                 hdmi_destroy(&hdmi->refcount);
 243         }
 244
 245         return ERR_PTR(ret);
 246 }
 247
 248 /*
 249  * The hdmi device:
 250  */
 251
 252 #include <linux/of_gpio.h>
 253
 254 static void set_hdmi_pdev(struct drm_device *dev,
 255                 struct platform_device *pdev)
 256 {
 257         struct msm_drm_private *priv = dev->dev_private;
 258         priv->hdmi_pdev = pdev;
 259 }
 260
 261 static int hdmi_bind(struct device *dev, struct device *master, void *data)
 262 {
 263         static struct hdmi_platform_config config = {};
 264 #ifdef CONFIG_OF
 265         struct device_node *of_node = dev->of_node;
 266
 267         int get_gpio(const char *name)
 268         {
 269                 int gpio = of_get_named_gpio(of_node, name, 0);
 270                 if (gpio < 0) {
 271                         char name2[32];
 272                         snprintf(name2, sizeof(name2), "%s-gpio", name);
 273                         gpio = of_get_named_gpio(of_node, name2, 0);
 274                         if (gpio < 0) {
 275                                 dev_err(dev, "failed to get gpio: %s (%d)\n",
 276                                                 name, gpio);
 277                                 gpio = -1;
 278                         }
 279                 }
 280                 return gpio;
 281         }
 282
 283         if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8074")) {
 284                 static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v"};
 285                 static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"};
 286                 static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"};
 287                 static unsigned long hpd_clk_freq[] = {0, 19200000, 0};
 288                 static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"};
 289                 config.phy_init      = hdmi_phy_8x74_init;
 290                 config.hpd_reg_names = hpd_reg_names;
 291                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 292                 config.pwr_reg_names = pwr_reg_names;
 293                 config.pwr_reg_cnt   = ARRAY_SIZE(pwr_reg_names);
 294                 config.hpd_clk_names = hpd_clk_names;
 295                 config.hpd_freq      = hpd_clk_freq;
 296                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 297                 config.pwr_clk_names = pwr_clk_names;
 298                 config.pwr_clk_cnt   = ARRAY_SIZE(pwr_clk_names);
 299                 config.shared_irq    = true;
 300         } else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8960")) {
 301                 static const char *hpd_clk_names[] = {"core_clk", "master_iface_clk", "slave_iface_clk"};
 302                 static const char *hpd_reg_names[] = {"core-vdda", "hdmi-mux"};
 303                 config.phy_init      = hdmi_phy_8960_init;
 304                 config.hpd_reg_names = hpd_reg_names;
 305                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 306                 config.hpd_clk_names = hpd_clk_names;
 307                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 308         } else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8660")) {
 309                 config.phy_init      = hdmi_phy_8x60_init;
 310         } else {
 311                 dev_err(dev, "unknown phy: %s\n", of_node->name);
 312         }
 313
 314         config.mmio_name     = "core_physical";
 315         config.ddc_clk_gpio  = get_gpio("qcom,hdmi-tx-ddc-clk");
 316         config.ddc_data_gpio = get_gpio("qcom,hdmi-tx-ddc-data");
 317         config.hpd_gpio      = get_gpio("qcom,hdmi-tx-hpd");
 318         config.mux_en_gpio   = get_gpio("qcom,hdmi-tx-mux-en");
 319         config.mux_sel_gpio  = get_gpio("qcom,hdmi-tx-mux-sel");
 320
 321 #else
 322         static const char *hpd_clk_names[] = {
 323                         "core_clk", "master_iface_clk", "slave_iface_clk",
 324         };
 325         if (cpu_is_apq8064()) {
 326                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 327                 config.phy_init      = hdmi_phy_8960_init;
 328                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 329                 config.hpd_reg_names = hpd_reg_names;
 330                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 331                 config.hpd_clk_names = hpd_clk_names;
 332                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 333                 config.ddc_clk_gpio  = 70;
 334                 config.ddc_data_gpio = 71;
 335                 config.hpd_gpio      = 72;
 336                 config.mux_en_gpio   = -1;
 337                 config.mux_sel_gpio  = -1;
 338         } else if (cpu_is_msm8960() || cpu_is_msm8960ab()) {
 339                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 340                 config.phy_init      = hdmi_phy_8960_init;
 341                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 342                 config.hpd_reg_names = hpd_reg_names;
 343                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 344                 config.hpd_clk_names = hpd_clk_names;
 345                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 346                 config.ddc_clk_gpio  = 100;
 347                 config.ddc_data_gpio = 101;
 348                 config.hpd_gpio      = 102;
 349                 config.mux_en_gpio   = -1;
 350                 config.mux_sel_gpio  = -1;
 351         } else if (cpu_is_msm8x60()) {
 352                 static const char *hpd_reg_names[] = {
 353                                 "8901_hdmi_mvs", "8901_mpp0"
 354                 };
 355                 config.phy_init      = hdmi_phy_8x60_init;
 356                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 357                 config.hpd_reg_names = hpd_reg_names;
 358                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 359                 config.hpd_clk_names = hpd_clk_names;
 360                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 361                 config.ddc_clk_gpio  = 170;
 362                 config.ddc_data_gpio = 171;
 363                 config.hpd_gpio      = 172;
 364                 config.mux_en_gpio   = -1;
 365                 config.mux_sel_gpio  = -1;
 366         }
 367 #endif
 368         dev->platform_data = &config;
 369         set_hdmi_pdev(dev_get_drvdata(master), to_platform_device(dev));
 370         return 0;
 371 }
 372
 373 static void hdmi_unbind(struct device *dev, struct device *master,
 374                 void *data)
 375 {
 376         set_hdmi_pdev(dev_get_drvdata(master), NULL);
 377 }
 378
 379 static const struct component_ops hdmi_ops = {
 380                 .bind   = hdmi_bind,
 381                 .unbind = hdmi_unbind,
 382 };
 383
 384 static int hdmi_dev_probe(struct platform_device *pdev)
 385 {
 386         return component_add(&pdev->dev, &hdmi_ops);
 387 }
 388
 389 static int hdmi_dev_remove(struct platform_device *pdev)
 390 {
 391         component_del(&pdev->dev, &hdmi_ops);
 392         return 0;
 393 }
 394
 395 static const struct of_device_id dt_match[] = {
 396         { .compatible = "qcom,hdmi-tx-8074" },
 397         { .compatible = "qcom,hdmi-tx-8960" },
 398         { .compatible = "qcom,hdmi-tx-8660" },
 399         {}
 400 };
 401
 402 static struct platform_driver hdmi_driver = {
 403         .probe = hdmi_dev_probe,
 404         .remove = hdmi_dev_remove,
 405         .driver = {
 406                 .name = "hdmi_msm",
 407                 .of_match_table = dt_match,
 408         },
 409 };
 410
 411 void __init hdmi_register(void)
 412 {
 413         platform_driver_register(&hdmi_driver);
 414 }
 415
 416 void __exit hdmi_unregister(void)
 417 {
 418         platform_driver_unregister(&hdmi_driver);
 419 }