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 <linux/of_irq.h> 19 #include "hdmi.h" 20 21 void hdmi_set_mode(struct hdmi *hdmi, bool power_on) 22 { 23 uint32_t ctrl = 0; 24 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 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", 40 power_on ? "Enable" : "Disable", ctrl); 41 } 42 43 static irqreturn_t hdmi_irq(int irq, void *dev_id) 44 { 45 struct hdmi *hdmi = dev_id; 46 47 /* Process HPD: */ 48 hdmi_connector_irq(hdmi->connector); 49 50 /* Process DDC: */ 51 hdmi_i2c_irq(hdmi->i2c); 52 53 /* TODO audio.. */ 54 55 return IRQ_HANDLED; 56 } 57 58 static void hdmi_destroy(struct hdmi *hdmi) 59 { 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 /* construct hdmi at bind/probe time, grab all the resources. If 72 * we are to EPROBE_DEFER we want to do it here, rather than later 73 * at modeset_init() time 74 */ 75 static struct hdmi *hdmi_init(struct platform_device *pdev) 76 { 77 struct hdmi_platform_config *config = pdev->dev.platform_data; 78 struct hdmi *hdmi = NULL; 79 int i, ret; 80 81 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 82 if (!hdmi) { 83 ret = -ENOMEM; 84 goto fail; 85 } 86 87 hdmi->pdev = pdev; 88 hdmi->config = config; 89 90 /* not sure about which phy maps to which msm.. probably I miss some */ 91 if (config->phy_init) 92 hdmi->phy = config->phy_init(hdmi); 93 else 94 hdmi->phy = ERR_PTR(-ENXIO); 95 96 if (IS_ERR(hdmi->phy)) { 97 ret = PTR_ERR(hdmi->phy); 98 dev_err(&pdev->dev, "failed to load phy: %d\n", ret); 99 hdmi->phy = NULL; 100 goto fail; 101 } 102 103 hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI"); 104 if (IS_ERR(hdmi->mmio)) { 105 ret = PTR_ERR(hdmi->mmio); 106 goto fail; 107 } 108 109 BUG_ON(config->hpd_reg_cnt > ARRAY_SIZE(hdmi->hpd_regs)); 110 for (i = 0; i < config->hpd_reg_cnt; i++) { 111 struct regulator *reg; 112 113 reg = devm_regulator_get(&pdev->dev, 114 config->hpd_reg_names[i]); 115 if (IS_ERR(reg)) { 116 ret = PTR_ERR(reg); 117 dev_err(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", 118 config->hpd_reg_names[i], ret); 119 goto fail; 120 } 121 122 hdmi->hpd_regs[i] = reg; 123 } 124 125 BUG_ON(config->pwr_reg_cnt > ARRAY_SIZE(hdmi->pwr_regs)); 126 for (i = 0; i < config->pwr_reg_cnt; i++) { 127 struct regulator *reg; 128 129 reg = devm_regulator_get(&pdev->dev, 130 config->pwr_reg_names[i]); 131 if (IS_ERR(reg)) { 132 ret = PTR_ERR(reg); 133 dev_err(&pdev->dev, "failed to get pwr regulator: %s (%d)\n", 134 config->pwr_reg_names[i], ret); 135 goto fail; 136 } 137 138 hdmi->pwr_regs[i] = reg; 139 } 140 141 BUG_ON(config->hpd_clk_cnt > ARRAY_SIZE(hdmi->hpd_clks)); 142 for (i = 0; i < config->hpd_clk_cnt; i++) { 143 struct clk *clk; 144 145 clk = devm_clk_get(&pdev->dev, config->hpd_clk_names[i]); 146 if (IS_ERR(clk)) { 147 ret = PTR_ERR(clk); 148 dev_err(&pdev->dev, "failed to get hpd clk: %s (%d)\n", 149 config->hpd_clk_names[i], ret); 150 goto fail; 151 } 152 153 hdmi->hpd_clks[i] = clk; 154 } 155 156 BUG_ON(config->pwr_clk_cnt > ARRAY_SIZE(hdmi->pwr_clks)); 157 for (i = 0; i < config->pwr_clk_cnt; i++) { 158 struct clk *clk; 159 160 clk = devm_clk_get(&pdev->dev, config->pwr_clk_names[i]); 161 if (IS_ERR(clk)) { 162 ret = PTR_ERR(clk); 163 dev_err(&pdev->dev, "failed to get pwr clk: %s (%d)\n", 164 config->pwr_clk_names[i], ret); 165 goto fail; 166 } 167 168 hdmi->pwr_clks[i] = clk; 169 } 170 171 hdmi->i2c = hdmi_i2c_init(hdmi); 172 if (IS_ERR(hdmi->i2c)) { 173 ret = PTR_ERR(hdmi->i2c); 174 dev_err(&pdev->dev, "failed to get i2c: %d\n", ret); 175 hdmi->i2c = NULL; 176 goto fail; 177 } 178 179 return hdmi; 180 181 fail: 182 if (hdmi) 183 hdmi_destroy(hdmi); 184 185 return ERR_PTR(ret); 186 } 187 188 /* Second part of initialization, the drm/kms level modeset_init, 189 * constructs/initializes mode objects, etc, is called from master 190 * driver (not hdmi sub-device's probe/bind!) 191 * 192 * Any resource (regulator/clk/etc) which could be missing at boot 193 * should be handled in hdmi_init() so that failure happens from 194 * hdmi sub-device's probe. 195 */ 196 int hdmi_modeset_init(struct hdmi *hdmi, 197 struct drm_device *dev, struct drm_encoder *encoder) 198 { 199 struct msm_drm_private *priv = dev->dev_private; 200 struct platform_device *pdev = hdmi->pdev; 201 int ret; 202 203 hdmi->dev = dev; 204 hdmi->encoder = encoder; 205 206 hdmi_audio_infoframe_init(&hdmi->audio.infoframe); 207 208 hdmi->bridge = hdmi_bridge_init(hdmi); 209 if (IS_ERR(hdmi->bridge)) { 210 ret = PTR_ERR(hdmi->bridge); 211 dev_err(dev->dev, "failed to create HDMI bridge: %d\n", ret); 212 hdmi->bridge = NULL; 213 goto fail; 214 } 215 216 hdmi->connector = hdmi_connector_init(hdmi); 217 if (IS_ERR(hdmi->connector)) { 218 ret = PTR_ERR(hdmi->connector); 219 dev_err(dev->dev, "failed to create HDMI connector: %d\n", ret); 220 hdmi->connector = NULL; 221 goto fail; 222 } 223 224 hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); 225 if (hdmi->irq < 0) { 226 ret = hdmi->irq; 227 dev_err(dev->dev, "failed to get irq: %d\n", ret); 228 goto fail; 229 } 230 231 ret = devm_request_irq(&pdev->dev, hdmi->irq, 232 hdmi_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, 233 "hdmi_isr", hdmi); 234 if (ret < 0) { 235 dev_err(dev->dev, "failed to request IRQ%u: %d\n", 236 hdmi->irq, ret); 237 goto fail; 238 } 239 240 encoder->bridge = hdmi->bridge; 241 242 priv->bridges[priv->num_bridges++] = hdmi->bridge; 243 priv->connectors[priv->num_connectors++] = hdmi->connector; 244 245 platform_set_drvdata(pdev, hdmi); 246 247 return 0; 248 249 fail: 250 /* bridge/connector are normally destroyed by drm: */ 251 if (hdmi->bridge) { 252 hdmi->bridge->funcs->destroy(hdmi->bridge); 253 hdmi->bridge = NULL; 254 } 255 if (hdmi->connector) { 256 hdmi->connector->funcs->destroy(hdmi->connector); 257 hdmi->connector = NULL; 258 } 259 260 return ret; 261 } 262 263 /* 264 * The hdmi device: 265 */ 266 267 #include <linux/of_gpio.h> 268 269 #ifdef CONFIG_OF 270 static int get_gpio(struct device *dev, struct device_node *of_node, const char *name) 271 { 272 int gpio = of_get_named_gpio(of_node, name, 0); 273 if (gpio < 0) { 274 char name2[32]; 275 snprintf(name2, sizeof(name2), "%s-gpio", name); 276 gpio = of_get_named_gpio(of_node, name2, 0); 277 if (gpio < 0) { 278 dev_err(dev, "failed to get gpio: %s (%d)\n", 279 name, gpio); 280 gpio = -1; 281 } 282 } 283 return gpio; 284 } 285 #endif 286 287 static int hdmi_bind(struct device *dev, struct device *master, void *data) 288 { 289 struct drm_device *drm = dev_get_drvdata(master); 290 struct msm_drm_private *priv = drm->dev_private; 291 static struct hdmi_platform_config config = {}; 292 struct hdmi *hdmi; 293 #ifdef CONFIG_OF 294 struct device_node *of_node = dev->of_node; 295 296 if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8074")) { 297 static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v"}; 298 static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"}; 299 static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"}; 300 static unsigned long hpd_clk_freq[] = {0, 19200000, 0}; 301 static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"}; 302 config.phy_init = hdmi_phy_8x74_init; 303 config.hpd_reg_names = hpd_reg_names; 304 config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names); 305 config.pwr_reg_names = pwr_reg_names; 306 config.pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names); 307 config.hpd_clk_names = hpd_clk_names; 308 config.hpd_freq = hpd_clk_freq; 309 config.hpd_clk_cnt = ARRAY_SIZE(hpd_clk_names); 310 config.pwr_clk_names = pwr_clk_names; 311 config.pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names); 312 } else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8960")) { 313 static const char *hpd_clk_names[] = {"core_clk", "master_iface_clk", "slave_iface_clk"}; 314 static const char *hpd_reg_names[] = {"core-vdda", "hdmi-mux"}; 315 config.phy_init = hdmi_phy_8960_init; 316 config.hpd_reg_names = hpd_reg_names; 317 config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names); 318 config.hpd_clk_names = hpd_clk_names; 319 config.hpd_clk_cnt = ARRAY_SIZE(hpd_clk_names); 320 } else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8660")) { 321 config.phy_init = hdmi_phy_8x60_init; 322 } else { 323 dev_err(dev, "unknown phy: %s\n", of_node->name); 324 } 325 326 config.mmio_name = "core_physical"; 327 config.ddc_clk_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk"); 328 config.ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data"); 329 config.hpd_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd"); 330 config.mux_en_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-en"); 331 config.mux_sel_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-sel"); 332 config.mux_lpm_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-lpm"); 333 334 #else 335 static const char *hpd_clk_names[] = { 336 "core_clk", "master_iface_clk", "slave_iface_clk", 337 }; 338 if (cpu_is_apq8064()) { 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 = 70; 347 config.ddc_data_gpio = 71; 348 config.hpd_gpio = 72; 349 config.mux_en_gpio = -1; 350 config.mux_sel_gpio = -1; 351 } else if (cpu_is_msm8960() || cpu_is_msm8960ab()) { 352 static const char *hpd_reg_names[] = {"8921_hdmi_mvs"}; 353 config.phy_init = hdmi_phy_8960_init; 354 config.mmio_name = "hdmi_msm_hdmi_addr"; 355 config.hpd_reg_names = hpd_reg_names; 356 config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names); 357 config.hpd_clk_names = hpd_clk_names; 358 config.hpd_clk_cnt = ARRAY_SIZE(hpd_clk_names); 359 config.ddc_clk_gpio = 100; 360 config.ddc_data_gpio = 101; 361 config.hpd_gpio = 102; 362 config.mux_en_gpio = -1; 363 config.mux_sel_gpio = -1; 364 } else if (cpu_is_msm8x60()) { 365 static const char *hpd_reg_names[] = { 366 "8901_hdmi_mvs", "8901_mpp0" 367 }; 368 config.phy_init = hdmi_phy_8x60_init; 369 config.mmio_name = "hdmi_msm_hdmi_addr"; 370 config.hpd_reg_names = hpd_reg_names; 371 config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names); 372 config.hpd_clk_names = hpd_clk_names; 373 config.hpd_clk_cnt = ARRAY_SIZE(hpd_clk_names); 374 config.ddc_clk_gpio = 170; 375 config.ddc_data_gpio = 171; 376 config.hpd_gpio = 172; 377 config.mux_en_gpio = -1; 378 config.mux_sel_gpio = -1; 379 } 380 #endif 381 dev->platform_data = &config; 382 hdmi = hdmi_init(to_platform_device(dev)); 383 if (IS_ERR(hdmi)) 384 return PTR_ERR(hdmi); 385 priv->hdmi = hdmi; 386 return 0; 387 } 388 389 static void hdmi_unbind(struct device *dev, struct device *master, 390 void *data) 391 { 392 struct drm_device *drm = dev_get_drvdata(master); 393 struct msm_drm_private *priv = drm->dev_private; 394 if (priv->hdmi) { 395 hdmi_destroy(priv->hdmi); 396 priv->hdmi = NULL; 397 } 398 } 399 400 static const struct component_ops hdmi_ops = { 401 .bind = hdmi_bind, 402 .unbind = hdmi_unbind, 403 }; 404 405 static int hdmi_dev_probe(struct platform_device *pdev) 406 { 407 return component_add(&pdev->dev, &hdmi_ops); 408 } 409 410 static int hdmi_dev_remove(struct platform_device *pdev) 411 { 412 component_del(&pdev->dev, &hdmi_ops); 413 return 0; 414 } 415 416 static const struct of_device_id dt_match[] = { 417 { .compatible = "qcom,hdmi-tx-8074" }, 418 { .compatible = "qcom,hdmi-tx-8960" }, 419 { .compatible = "qcom,hdmi-tx-8660" }, 420 {} 421 }; 422 423 static struct platform_driver hdmi_driver = { 424 .probe = hdmi_dev_probe, 425 .remove = hdmi_dev_remove, 426 .driver = { 427 .name = "hdmi_msm", 428 .of_match_table = dt_match, 429 }, 430 }; 431 432 void __init hdmi_register(void) 433 { 434 platform_driver_register(&hdmi_driver); 435 } 436 437 void __exit hdmi_unregister(void) 438 { 439 platform_driver_unregister(&hdmi_driver); 440 } 441