1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014 The Linux Foundation. All rights reserved. 4 * Copyright (C) 2013 Red Hat 5 * Author: Rob Clark <robdclark@gmail.com> 6 */ 7 8 #include <linux/gpio/consumer.h> 9 #include <linux/of_irq.h> 10 #include <linux/of_platform.h> 11 #include <linux/pinctrl/consumer.h> 12 #include <linux/platform_device.h> 13 14 #include <drm/drm_bridge_connector.h> 15 #include <drm/drm_of.h> 16 #include <drm/display/drm_hdmi_state_helper.h> 17 18 #include "hdmi.h" 19 20 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on) 21 { 22 uint32_t ctrl = 0; 23 unsigned long flags; 24 25 spin_lock_irqsave(&hdmi->reg_lock, flags); 26 if (power_on) { 27 ctrl |= HDMI_CTRL_ENABLE; 28 if (!hdmi->connector->display_info.is_hdmi) { 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 spin_unlock_irqrestore(&hdmi->reg_lock, flags); 41 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", 42 power_on ? "Enable" : "Disable", ctrl); 43 } 44 45 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) 46 { 47 struct hdmi *hdmi = dev_id; 48 49 /* Process HPD: */ 50 msm_hdmi_hpd_irq(hdmi->bridge); 51 52 /* Process DDC: */ 53 msm_hdmi_i2c_irq(hdmi->i2c); 54 55 /* Process HDCP: */ 56 if (hdmi->hdcp_ctrl) 57 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl); 58 59 /* TODO audio.. */ 60 61 return IRQ_HANDLED; 62 } 63 64 static void msm_hdmi_destroy(struct hdmi *hdmi) 65 { 66 /* 67 * at this point, hpd has been disabled, 68 * after flush workq, it's safe to deinit hdcp 69 */ 70 if (hdmi->workq) 71 destroy_workqueue(hdmi->workq); 72 msm_hdmi_hdcp_destroy(hdmi); 73 74 if (hdmi->i2c) 75 msm_hdmi_i2c_destroy(hdmi->i2c); 76 } 77 78 static void msm_hdmi_put_phy(struct hdmi *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 87 static int msm_hdmi_get_phy(struct hdmi *hdmi) 88 { 89 struct platform_device *pdev = hdmi->pdev; 90 struct platform_device *phy_pdev; 91 struct device_node *phy_node; 92 93 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 94 if (!phy_node) { 95 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 96 return -ENXIO; 97 } 98 99 phy_pdev = of_find_device_by_node(phy_node); 100 of_node_put(phy_node); 101 102 if (!phy_pdev) 103 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 104 105 hdmi->phy = platform_get_drvdata(phy_pdev); 106 if (!hdmi->phy) { 107 put_device(&phy_pdev->dev); 108 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 109 } 110 111 hdmi->phy_dev = &phy_pdev->dev; 112 113 return 0; 114 } 115 116 /* construct hdmi at bind/probe time, grab all the resources. If 117 * we are to EPROBE_DEFER we want to do it here, rather than later 118 * at modeset_init() time 119 */ 120 static int msm_hdmi_init(struct hdmi *hdmi) 121 { 122 struct platform_device *pdev = hdmi->pdev; 123 int ret; 124 125 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); 126 if (!hdmi->workq) { 127 ret = -ENOMEM; 128 goto fail; 129 } 130 131 hdmi->i2c = msm_hdmi_i2c_init(hdmi); 132 if (IS_ERR(hdmi->i2c)) { 133 ret = PTR_ERR(hdmi->i2c); 134 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); 135 hdmi->i2c = NULL; 136 goto fail; 137 } 138 139 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); 140 if (IS_ERR(hdmi->hdcp_ctrl)) { 141 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); 142 hdmi->hdcp_ctrl = NULL; 143 } 144 145 return 0; 146 147 fail: 148 msm_hdmi_destroy(hdmi); 149 150 return ret; 151 } 152 153 /* Second part of initialization, the drm/kms level modeset_init, 154 * constructs/initializes mode objects, etc, is called from master 155 * driver (not hdmi sub-device's probe/bind!) 156 * 157 * Any resource (regulator/clk/etc) which could be missing at boot 158 * should be handled in msm_hdmi_init() so that failure happens from 159 * hdmi sub-device's probe. 160 */ 161 int msm_hdmi_modeset_init(struct hdmi *hdmi, 162 struct drm_device *dev, struct drm_encoder *encoder) 163 { 164 int ret; 165 166 hdmi->dev = dev; 167 hdmi->encoder = encoder; 168 169 ret = msm_hdmi_bridge_init(hdmi); 170 if (ret) { 171 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); 172 goto fail; 173 } 174 175 if (hdmi->next_bridge) { 176 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge, 177 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 178 if (ret) { 179 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret); 180 goto fail; 181 } 182 } 183 184 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); 185 if (IS_ERR(hdmi->connector)) { 186 ret = PTR_ERR(hdmi->connector); 187 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); 188 hdmi->connector = NULL; 189 goto fail; 190 } 191 192 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); 193 194 ret = devm_request_irq(dev->dev, hdmi->irq, 195 msm_hdmi_irq, IRQF_TRIGGER_HIGH, 196 "hdmi_isr", hdmi); 197 if (ret < 0) { 198 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", 199 hdmi->irq, ret); 200 goto fail; 201 } 202 203 return 0; 204 205 fail: 206 if (hdmi->connector) { 207 hdmi->connector->funcs->destroy(hdmi->connector); 208 hdmi->connector = NULL; 209 } 210 211 return ret; 212 } 213 214 /* 215 * The hdmi device: 216 */ 217 218 static const char * const pwr_reg_names_8960[] = {"core-vdda"}; 219 static const char * const pwr_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 220 221 static const struct hdmi_platform_config hdmi_tx_8960_config = { 222 .pwr_reg_names = pwr_reg_names_8960, 223 .pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8960), 224 .pwr_clk_names = pwr_clk_names_8960, 225 .pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8960), 226 }; 227 228 static const char * const pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 229 static const char * const pwr_clk_names_8x74[] = {"iface", "core", "mdp_core", "alt_iface"}; 230 231 static const struct hdmi_platform_config hdmi_tx_8974_config = { 232 .pwr_reg_names = pwr_reg_names_8x74, 233 .pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8x74), 234 .pwr_clk_names = pwr_clk_names_8x74, 235 .pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8x74), 236 }; 237 238 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 239 { 240 struct msm_drm_private *priv = dev_get_drvdata(master); 241 struct hdmi *hdmi = dev_get_drvdata(dev); 242 int err; 243 244 err = msm_hdmi_init(hdmi); 245 if (err) 246 return err; 247 priv->hdmi = hdmi; 248 249 return 0; 250 } 251 252 static void msm_hdmi_unbind(struct device *dev, struct device *master, 253 void *data) 254 { 255 struct msm_drm_private *priv = dev_get_drvdata(master); 256 257 if (priv->hdmi) { 258 msm_hdmi_destroy(priv->hdmi); 259 priv->hdmi = NULL; 260 } 261 } 262 263 static const struct component_ops msm_hdmi_ops = { 264 .bind = msm_hdmi_bind, 265 .unbind = msm_hdmi_unbind, 266 }; 267 268 static int msm_hdmi_dev_probe(struct platform_device *pdev) 269 { 270 const struct hdmi_platform_config *config; 271 struct device *dev = &pdev->dev; 272 struct hdmi *hdmi; 273 struct resource *res; 274 int i, ret; 275 276 config = of_device_get_match_data(dev); 277 if (!config) 278 return -EINVAL; 279 280 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 281 if (!hdmi) 282 return -ENOMEM; 283 284 hdmi->pdev = pdev; 285 hdmi->config = config; 286 spin_lock_init(&hdmi->reg_lock); 287 mutex_init(&hdmi->state_mutex); 288 289 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); 290 if (ret && ret != -ENODEV) 291 return ret; 292 293 hdmi->mmio = msm_ioremap(pdev, "core_physical"); 294 if (IS_ERR(hdmi->mmio)) 295 return PTR_ERR(hdmi->mmio); 296 297 /* HDCP needs physical address of hdmi register */ 298 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 299 "core_physical"); 300 if (!res) 301 return -EINVAL; 302 hdmi->mmio_phy_addr = res->start; 303 304 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical"); 305 if (IS_ERR(hdmi->qfprom_mmio)) { 306 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 307 hdmi->qfprom_mmio = NULL; 308 } 309 310 hdmi->irq = platform_get_irq(pdev, 0); 311 if (hdmi->irq < 0) 312 return hdmi->irq; 313 314 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 315 config->pwr_reg_cnt, 316 sizeof(hdmi->pwr_regs[0]), 317 GFP_KERNEL); 318 if (!hdmi->pwr_regs) 319 return -ENOMEM; 320 321 for (i = 0; i < config->pwr_reg_cnt; i++) 322 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; 323 324 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); 325 if (ret) 326 return dev_err_probe(dev, ret, "failed to get pwr regulators\n"); 327 328 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 329 config->pwr_clk_cnt, 330 sizeof(hdmi->pwr_clks[0]), 331 GFP_KERNEL); 332 if (!hdmi->pwr_clks) 333 return -ENOMEM; 334 335 for (i = 0; i < config->pwr_clk_cnt; i++) 336 hdmi->pwr_clks[i].id = config->pwr_clk_names[i]; 337 338 ret = devm_clk_bulk_get(&pdev->dev, config->pwr_clk_cnt, hdmi->pwr_clks); 339 if (ret) 340 return ret; 341 342 hdmi->extp_clk = devm_clk_get_optional(&pdev->dev, "extp"); 343 if (IS_ERR(hdmi->extp_clk)) 344 return dev_err_probe(dev, PTR_ERR(hdmi->extp_clk), 345 "failed to get extp clock\n"); 346 347 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 348 /* This will catch e.g. -EPROBE_DEFER */ 349 if (IS_ERR(hdmi->hpd_gpiod)) 350 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod), 351 "failed to get hpd gpio\n"); 352 353 if (!hdmi->hpd_gpiod) 354 DBG("failed to get HPD gpio"); 355 356 if (hdmi->hpd_gpiod) 357 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 358 359 ret = msm_hdmi_get_phy(hdmi); 360 if (ret) { 361 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 362 return ret; 363 } 364 365 ret = devm_pm_runtime_enable(&pdev->dev); 366 if (ret) 367 goto err_put_phy; 368 369 platform_set_drvdata(pdev, hdmi); 370 371 ret = component_add(&pdev->dev, &msm_hdmi_ops); 372 if (ret) 373 goto err_put_phy; 374 375 return 0; 376 377 err_put_phy: 378 msm_hdmi_put_phy(hdmi); 379 return ret; 380 } 381 382 static void msm_hdmi_dev_remove(struct platform_device *pdev) 383 { 384 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev); 385 386 component_del(&pdev->dev, &msm_hdmi_ops); 387 388 msm_hdmi_put_phy(hdmi); 389 } 390 391 static int msm_hdmi_runtime_suspend(struct device *dev) 392 { 393 struct hdmi *hdmi = dev_get_drvdata(dev); 394 const struct hdmi_platform_config *config = hdmi->config; 395 396 clk_bulk_disable_unprepare(config->pwr_clk_cnt, hdmi->pwr_clks); 397 398 pinctrl_pm_select_sleep_state(dev); 399 400 regulator_bulk_disable(config->pwr_reg_cnt, hdmi->pwr_regs); 401 402 return 0; 403 } 404 405 static int msm_hdmi_runtime_resume(struct device *dev) 406 { 407 struct hdmi *hdmi = dev_get_drvdata(dev); 408 const struct hdmi_platform_config *config = hdmi->config; 409 int ret; 410 411 ret = regulator_bulk_enable(config->pwr_reg_cnt, hdmi->pwr_regs); 412 if (ret) 413 return ret; 414 415 ret = pinctrl_pm_select_default_state(dev); 416 if (ret) 417 goto fail; 418 419 ret = clk_bulk_prepare_enable(config->pwr_clk_cnt, hdmi->pwr_clks); 420 if (ret) 421 goto fail; 422 423 return 0; 424 425 fail: 426 pinctrl_pm_select_sleep_state(dev); 427 428 return ret; 429 } 430 431 DEFINE_RUNTIME_DEV_PM_OPS(msm_hdmi_pm_ops, msm_hdmi_runtime_suspend, msm_hdmi_runtime_resume, NULL); 432 433 static const struct of_device_id msm_hdmi_dt_match[] = { 434 { .compatible = "qcom,hdmi-tx-8998", .data = &hdmi_tx_8974_config }, 435 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, 436 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, 437 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, 438 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 439 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 440 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, 441 {} 442 }; 443 444 static struct platform_driver msm_hdmi_driver = { 445 .probe = msm_hdmi_dev_probe, 446 .remove = msm_hdmi_dev_remove, 447 .driver = { 448 .name = "hdmi_msm", 449 .of_match_table = msm_hdmi_dt_match, 450 .pm = &msm_hdmi_pm_ops, 451 }, 452 }; 453 454 void __init msm_hdmi_register(void) 455 { 456 msm_hdmi_phy_driver_register(); 457 platform_driver_register(&msm_hdmi_driver); 458 } 459 460 void __exit msm_hdmi_unregister(void) 461 { 462 platform_driver_unregister(&msm_hdmi_driver); 463 msm_hdmi_phy_driver_unregister(); 464 } 465