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(&pdev->dev, config->hpd_reg_names[i]);
 127                 if (IS_ERR(reg)) {
 128                         ret = PTR_ERR(reg);
 129                         dev_err(dev->dev, "failed to get hpd regulator: %s (%d)\n",
 130                                         config->hpd_reg_names[i], ret);
 131                         goto fail;
 132                 }
 133
 134                 hdmi->hpd_regs[i] = reg;
 135         }
 136
 137         BUG_ON(config->pwr_reg_cnt > ARRAY_SIZE(hdmi->pwr_regs));
 138         for (i = 0; i < config->pwr_reg_cnt; i++) {
 139                 struct regulator *reg;
 140
 141                 reg = devm_regulator_get(&pdev->dev, config->pwr_reg_names[i]);
 142                 if (IS_ERR(reg)) {
 143                         ret = PTR_ERR(reg);
 144                         dev_err(dev->dev, "failed to get pwr regulator: %s (%d)\n",
 145                                         config->pwr_reg_names[i], ret);
 146                         goto fail;
 147                 }
 148
 149                 hdmi->pwr_regs[i] = reg;
 150         }
 151
 152         BUG_ON(config->hpd_clk_cnt > ARRAY_SIZE(hdmi->hpd_clks));
 153         for (i = 0; i < config->hpd_clk_cnt; i++) {
 154                 struct clk *clk;
 155
 156                 clk = devm_clk_get(&pdev->dev, config->hpd_clk_names[i]);
 157                 if (IS_ERR(clk)) {
 158                         ret = PTR_ERR(clk);
 159                         dev_err(dev->dev, "failed to get hpd clk: %s (%d)\n",
 160                                         config->hpd_clk_names[i], ret);
 161                         goto fail;
 162                 }
 163
 164                 hdmi->hpd_clks[i] = clk;
 165         }
 166
 167         BUG_ON(config->pwr_clk_cnt > ARRAY_SIZE(hdmi->pwr_clks));
 168         for (i = 0; i < config->pwr_clk_cnt; i++) {
 169                 struct clk *clk;
 170
 171                 clk = devm_clk_get(&pdev->dev, config->pwr_clk_names[i]);
 172                 if (IS_ERR(clk)) {
 173                         ret = PTR_ERR(clk);
 174                         dev_err(dev->dev, "failed to get pwr clk: %s (%d)\n",
 175                                         config->pwr_clk_names[i], ret);
 176                         goto fail;
 177                 }
 178
 179                 hdmi->pwr_clks[i] = clk;
 180         }
 181
 182         hdmi->i2c = hdmi_i2c_init(hdmi);
 183         if (IS_ERR(hdmi->i2c)) {
 184                 ret = PTR_ERR(hdmi->i2c);
 185                 dev_err(dev->dev, "failed to get i2c: %d\n", ret);
 186                 hdmi->i2c = NULL;
 187                 goto fail;
 188         }
 189
 190         hdmi->bridge = hdmi_bridge_init(hdmi);
 191         if (IS_ERR(hdmi->bridge)) {
 192                 ret = PTR_ERR(hdmi->bridge);
 193                 dev_err(dev->dev, "failed to create HDMI bridge: %d\n", ret);
 194                 hdmi->bridge = NULL;
 195                 goto fail;
 196         }
 197
 198         hdmi->connector = hdmi_connector_init(hdmi);
 199         if (IS_ERR(hdmi->connector)) {
 200                 ret = PTR_ERR(hdmi->connector);
 201                 dev_err(dev->dev, "failed to create HDMI connector: %d\n", ret);
 202                 hdmi->connector = NULL;
 203                 goto fail;
 204         }
 205
 206         if (!config->shared_irq) {
 207                 hdmi->irq = platform_get_irq(pdev, 0);
 208                 if (hdmi->irq < 0) {
 209                         ret = hdmi->irq;
 210                         dev_err(dev->dev, "failed to get irq: %d\n", ret);
 211                         goto fail;
 212                 }
 213
 214                 ret = devm_request_threaded_irq(&pdev->dev, hdmi->irq,
 215                                 NULL, hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 216                                 "hdmi_isr", hdmi);
 217                 if (ret < 0) {
 218                         dev_err(dev->dev, "failed to request IRQ%u: %d\n",
 219                                         hdmi->irq, ret);
 220                         goto fail;
 221                 }
 222         }
 223
 224         encoder->bridge = hdmi->bridge;
 225
 226         priv->bridges[priv->num_bridges++]       = hdmi->bridge;
 227         priv->connectors[priv->num_connectors++] = hdmi->connector;
 228
 229         platform_set_drvdata(pdev, hdmi);
 230
 231         return hdmi;
 232
 233 fail:
 234         if (hdmi) {
 235                 /* bridge/connector are normally destroyed by drm: */
 236                 if (hdmi->bridge)
 237                         hdmi->bridge->funcs->destroy(hdmi->bridge);
 238                 if (hdmi->connector)
 239                         hdmi->connector->funcs->destroy(hdmi->connector);
 240                 hdmi_destroy(&hdmi->refcount);
 241         }
 242
 243         return ERR_PTR(ret);
 244 }
 245
 246 /*
 247  * The hdmi device:
 248  */
 249
 250 #include <linux/of_gpio.h>
 251
 252 static void set_hdmi_pdev(struct drm_device *dev,
 253                 struct platform_device *pdev)
 254 {
 255         struct msm_drm_private *priv = dev->dev_private;
 256         priv->hdmi_pdev = pdev;
 257 }
 258
 259 static int hdmi_bind(struct device *dev, struct device *master, void *data)
 260 {
 261         static struct hdmi_platform_config config = {};
 262 #ifdef CONFIG_OF
 263         struct device_node *of_node = dev->of_node;
 264
 265         int get_gpio(const char *name)
 266         {
 267                 int gpio = of_get_named_gpio(of_node, name, 0);
 268                 if (gpio < 0) {
 269                         dev_err(dev, "failed to get gpio: %s (%d)\n",
 270                                         name, gpio);
 271                         gpio = -1;
 272                 }
 273                 return gpio;
 274         }
 275
 276         /* TODO actually use DT.. */
 277         static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v"};
 278         static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"};
 279         static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"};
 280         static unsigned long hpd_clk_freq[] = {0, 19200000, 0};
 281         static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"};
 282
 283         config.phy_init      = hdmi_phy_8x74_init;
 284         config.mmio_name     = "core_physical";
 285         config.hpd_reg_names = hpd_reg_names;
 286         config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 287         config.pwr_reg_names = pwr_reg_names;
 288         config.pwr_reg_cnt   = ARRAY_SIZE(pwr_reg_names);
 289         config.hpd_clk_names = hpd_clk_names;
 290         config.hpd_freq      = hpd_clk_freq;
 291         config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 292         config.pwr_clk_names = pwr_clk_names;
 293         config.pwr_clk_cnt   = ARRAY_SIZE(pwr_clk_names);
 294         config.ddc_clk_gpio  = get_gpio("qcom,hdmi-tx-ddc-clk");
 295         config.ddc_data_gpio = get_gpio("qcom,hdmi-tx-ddc-data");
 296         config.hpd_gpio      = get_gpio("qcom,hdmi-tx-hpd");
 297         config.mux_en_gpio   = get_gpio("qcom,hdmi-tx-mux-en");
 298         config.mux_sel_gpio  = get_gpio("qcom,hdmi-tx-mux-sel");
 299         config.shared_irq    = true;
 300
 301 #else
 302         static const char *hpd_clk_names[] = {
 303                         "core_clk", "master_iface_clk", "slave_iface_clk",
 304         };
 305         if (cpu_is_apq8064()) {
 306                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 307                 config.phy_init      = hdmi_phy_8960_init;
 308                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 309                 config.hpd_reg_names = hpd_reg_names;
 310                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 311                 config.hpd_clk_names = hpd_clk_names;
 312                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 313                 config.ddc_clk_gpio  = 70;
 314                 config.ddc_data_gpio = 71;
 315                 config.hpd_gpio      = 72;
 316                 config.mux_en_gpio   = -1;
 317                 config.mux_sel_gpio  = -1;
 318         } else if (cpu_is_msm8960() || cpu_is_msm8960ab()) {
 319                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 320                 config.phy_init      = hdmi_phy_8960_init;
 321                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 322                 config.hpd_reg_names = hpd_reg_names;
 323                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 324                 config.hpd_clk_names = hpd_clk_names;
 325                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 326                 config.ddc_clk_gpio  = 100;
 327                 config.ddc_data_gpio = 101;
 328                 config.hpd_gpio      = 102;
 329                 config.mux_en_gpio   = -1;
 330                 config.mux_sel_gpio  = -1;
 331         } else if (cpu_is_msm8x60()) {
 332                 static const char *hpd_reg_names[] = {
 333                                 "8901_hdmi_mvs", "8901_mpp0"
 334                 };
 335                 config.phy_init      = hdmi_phy_8x60_init;
 336                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 337                 config.hpd_reg_names = hpd_reg_names;
 338                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 339                 config.hpd_clk_names = hpd_clk_names;
 340                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 341                 config.ddc_clk_gpio  = 170;
 342                 config.ddc_data_gpio = 171;
 343                 config.hpd_gpio      = 172;
 344                 config.mux_en_gpio   = -1;
 345                 config.mux_sel_gpio  = -1;
 346         }
 347 #endif
 348         dev->platform_data = &config;
 349         set_hdmi_pdev(dev_get_drvdata(master), to_platform_device(dev));
 350         return 0;
 351 }
 352
 353 static void hdmi_unbind(struct device *dev, struct device *master,
 354                 void *data)
 355 {
 356         set_hdmi_pdev(dev_get_drvdata(master), NULL);
 357 }
 358
 359 static const struct component_ops hdmi_ops = {
 360                 .bind   = hdmi_bind,
 361                 .unbind = hdmi_unbind,
 362 };
 363
 364 static int hdmi_dev_probe(struct platform_device *pdev)
 365 {
 366         return component_add(&pdev->dev, &hdmi_ops);
 367 }
 368
 369 static int hdmi_dev_remove(struct platform_device *pdev)
 370 {
 371         component_del(&pdev->dev, &hdmi_ops);
 372         return 0;
 373 }
 374
 375 static const struct of_device_id dt_match[] = {
 376         { .compatible = "qcom,hdmi-tx" },
 377         {}
 378 };
 379
 380 static struct platform_driver hdmi_driver = {
 381         .probe = hdmi_dev_probe,
 382         .remove = hdmi_dev_remove,
 383         .driver = {
 384                 .name = "hdmi_msm",
 385                 .of_match_table = dt_match,
 386         },
 387 };
 388
 389 void __init hdmi_register(void)
 390 {
 391         platform_driver_register(&hdmi_driver);
 392 }
 393
 394 void __exit hdmi_unregister(void)
 395 {
 396         platform_driver_unregister(&hdmi_driver);
 397 }