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 static struct platform_device *hdmi_pdev;
  21
  22 void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
  23 {
  24         uint32_t ctrl = 0;
  25
  26         if (power_on) {
  27                 ctrl |= HDMI_CTRL_ENABLE;
  28                 if (!hdmi->hdmi_mode) {
  29                         ctrl |= HDMI_CTRL_HDMI;
  30                         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  31                         ctrl &= ~HDMI_CTRL_HDMI;
  32                 } else {
  33                         ctrl |= HDMI_CTRL_HDMI;
  34                 }
  35         } else {
  36                 ctrl = HDMI_CTRL_HDMI;
  37         }
  38
  39         hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
  40         DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
  41                         power_on ? "Enable" : "Disable", ctrl);
  42 }
  43
  44 irqreturn_t hdmi_irq(int irq, void *dev_id)
  45 {
  46         struct hdmi *hdmi = dev_id;
  47
  48         /* Process HPD: */
  49         hdmi_connector_irq(hdmi->connector);
  50
  51         /* Process DDC: */
  52         hdmi_i2c_irq(hdmi->i2c);
  53
  54         /* TODO audio.. */
  55
  56         return IRQ_HANDLED;
  57 }
  58
  59 void hdmi_destroy(struct kref *kref)
  60 {
  61         struct hdmi *hdmi = container_of(kref, struct hdmi, refcount);
  62         struct hdmi_phy *phy = hdmi->phy;
  63
  64         if (phy)
  65                 phy->funcs->destroy(phy);
  66
  67         if (hdmi->i2c)
  68                 hdmi_i2c_destroy(hdmi->i2c);
  69
  70         put_device(&hdmi->pdev->dev);
  71 }
  72
  73 /* initialize connector */
  74 struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
  75 {
  76         struct hdmi *hdmi = NULL;
  77         struct msm_drm_private *priv = dev->dev_private;
  78         struct platform_device *pdev = hdmi_pdev;
  79         struct hdmi_platform_config *config;
  80         int i, ret;
  81
  82         if (!pdev) {
  83                 dev_err(dev->dev, "no hdmi device\n");
  84                 ret = -ENXIO;
  85                 goto fail;
  86         }
  87
  88         config = pdev->dev.platform_data;
  89
  90         hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL);
  91         if (!hdmi) {
  92                 ret = -ENOMEM;
  93                 goto fail;
  94         }
  95
  96         kref_init(&hdmi->refcount);
  97
  98         get_device(&pdev->dev);
  99
 100         hdmi->dev = dev;
 101         hdmi->pdev = pdev;
 102         hdmi->config = config;
 103         hdmi->encoder = encoder;
 104
 105         /* not sure about which phy maps to which msm.. probably I miss some */
 106         if (config->phy_init)
 107                 hdmi->phy = config->phy_init(hdmi);
 108         else
 109                 hdmi->phy = ERR_PTR(-ENXIO);
 110
 111         if (IS_ERR(hdmi->phy)) {
 112                 ret = PTR_ERR(hdmi->phy);
 113                 dev_err(dev->dev, "failed to load phy: %d\n", ret);
 114                 hdmi->phy = NULL;
 115                 goto fail;
 116         }
 117
 118         hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI");
 119         if (IS_ERR(hdmi->mmio)) {
 120                 ret = PTR_ERR(hdmi->mmio);
 121                 goto fail;
 122         }
 123
 124         BUG_ON(config->hpd_reg_cnt > ARRAY_SIZE(hdmi->hpd_regs));
 125         for (i = 0; i < config->hpd_reg_cnt; i++) {
 126                 struct regulator *reg;
 127
 128                 reg = devm_regulator_get(&pdev->dev, config->hpd_reg_names[i]);
 129                 if (IS_ERR(reg)) {
 130                         ret = PTR_ERR(reg);
 131                         dev_err(dev->dev, "failed to get hpd regulator: %s (%d)\n",
 132                                         config->hpd_reg_names[i], ret);
 133                         goto fail;
 134                 }
 135
 136                 hdmi->hpd_regs[i] = reg;
 137         }
 138
 139         BUG_ON(config->pwr_reg_cnt > ARRAY_SIZE(hdmi->pwr_regs));
 140         for (i = 0; i < config->pwr_reg_cnt; i++) {
 141                 struct regulator *reg;
 142
 143                 reg = devm_regulator_get(&pdev->dev, 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         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 int hdmi_dev_probe(struct platform_device *pdev)
 253 {
 254         static struct hdmi_platform_config config = {};
 255 #ifdef CONFIG_OF
 256         struct device_node *of_node = pdev->dev.of_node;
 257
 258         int get_gpio(const char *name)
 259         {
 260                 int gpio = of_get_named_gpio(of_node, name, 0);
 261                 if (gpio < 0) {
 262                         dev_err(&pdev->dev, "failed to get gpio: %s (%d)\n",
 263                                         name, gpio);
 264                         gpio = -1;
 265                 }
 266                 return gpio;
 267         }
 268
 269         /* TODO actually use DT.. */
 270         static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v"};
 271         static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"};
 272         static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"};
 273         static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"};
 274
 275         config.phy_init      = hdmi_phy_8x74_init;
 276         config.mmio_name     = "core_physical";
 277         config.hpd_reg_names = hpd_reg_names;
 278         config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 279         config.pwr_reg_names = pwr_reg_names;
 280         config.pwr_reg_cnt   = ARRAY_SIZE(pwr_reg_names);
 281         config.hpd_clk_names = hpd_clk_names;
 282         config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 283         config.pwr_clk_names = pwr_clk_names;
 284         config.pwr_clk_cnt   = ARRAY_SIZE(pwr_clk_names);
 285         config.ddc_clk_gpio  = get_gpio("qcom,hdmi-tx-ddc-clk");
 286         config.ddc_data_gpio = get_gpio("qcom,hdmi-tx-ddc-data");
 287         config.hpd_gpio      = get_gpio("qcom,hdmi-tx-hpd");
 288         config.mux_en_gpio   = get_gpio("qcom,hdmi-tx-mux-en");
 289         config.mux_sel_gpio  = get_gpio("qcom,hdmi-tx-mux-sel");
 290         config.shared_irq    = true;
 291
 292 #else
 293         static const char *hpd_clk_names[] = {
 294                         "core_clk", "master_iface_clk", "slave_iface_clk",
 295         };
 296         if (cpu_is_apq8064()) {
 297                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 298                 config.phy_init      = hdmi_phy_8960_init;
 299                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 300                 config.hpd_reg_names = hpd_reg_names;
 301                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 302                 config.hpd_clk_names = hpd_clk_names;
 303                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 304                 config.ddc_clk_gpio  = 70;
 305                 config.ddc_data_gpio = 71;
 306                 config.hpd_gpio      = 72;
 307                 config.mux_en_gpio   = -1;
 308                 config.mux_sel_gpio  = 13 + NR_GPIO_IRQS;
 309         } else if (cpu_is_msm8960() || cpu_is_msm8960ab()) {
 310                 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
 311                 config.phy_init      = hdmi_phy_8960_init;
 312                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 313                 config.hpd_reg_names = hpd_reg_names;
 314                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 315                 config.hpd_clk_names = hpd_clk_names;
 316                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 317                 config.ddc_clk_gpio  = 100;
 318                 config.ddc_data_gpio = 101;
 319                 config.hpd_gpio      = 102;
 320                 config.mux_en_gpio   = -1;
 321                 config.mux_sel_gpio  = -1;
 322         } else if (cpu_is_msm8x60()) {
 323                 static const char *hpd_reg_names[] = {
 324                                 "8901_hdmi_mvs", "8901_mpp0"
 325                 };
 326                 config.phy_init      = hdmi_phy_8x60_init;
 327                 config.mmio_name     = "hdmi_msm_hdmi_addr";
 328                 config.hpd_reg_names = hpd_reg_names;
 329                 config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
 330                 config.hpd_clk_names = hpd_clk_names;
 331                 config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
 332                 config.ddc_clk_gpio  = 170;
 333                 config.ddc_data_gpio = 171;
 334                 config.hpd_gpio      = 172;
 335                 config.mux_en_gpio   = -1;
 336                 config.mux_sel_gpio  = -1;
 337         }
 338 #endif
 339         pdev->dev.platform_data = &config;
 340         hdmi_pdev = pdev;
 341         return 0;
 342 }
 343
 344 static int hdmi_dev_remove(struct platform_device *pdev)
 345 {
 346         hdmi_pdev = NULL;
 347         return 0;
 348 }
 349
 350 static const struct of_device_id dt_match[] = {
 351         { .compatible = "qcom,hdmi-tx" },
 352         {}
 353 };
 354 MODULE_DEVICE_TABLE(of, dt_match);
 355
 356 static struct platform_driver hdmi_driver = {
 357         .probe = hdmi_dev_probe,
 358         .remove = hdmi_dev_remove,
 359         .driver = {
 360                 .name = "hdmi_msm",
 361                 .of_match_table = dt_match,
 362         },
 363 };
 364
 365 void __init hdmi_register(void)
 366 {
 367         platform_driver_register(&hdmi_driver);
 368 }
 369
 370 void __exit hdmi_unregister(void)
 371 {
 372         platform_driver_unregister(&hdmi_driver);
 373 }