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 "msm_kms.h" 19 #include "hdmi.h" 20 21 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on) 22 { 23 uint32_t ctrl = 0; 24 unsigned long flags; 25 26 spin_lock_irqsave(&hdmi->reg_lock, flags); 27 if (power_on) { 28 ctrl |= HDMI_CTRL_ENABLE; 29 if (!hdmi->connector->display_info.is_hdmi) { 30 ctrl |= HDMI_CTRL_HDMI; 31 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 32 ctrl &= ~HDMI_CTRL_HDMI; 33 } else { 34 ctrl |= HDMI_CTRL_HDMI; 35 } 36 } else { 37 ctrl = HDMI_CTRL_HDMI; 38 } 39 40 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 41 spin_unlock_irqrestore(&hdmi->reg_lock, flags); 42 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", 43 power_on ? "Enable" : "Disable", ctrl); 44 } 45 46 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) 47 { 48 struct hdmi *hdmi = dev_id; 49 50 /* Process HPD: */ 51 msm_hdmi_hpd_irq(hdmi->bridge); 52 53 /* Process DDC: */ 54 msm_hdmi_i2c_irq(hdmi->i2c); 55 56 /* Process HDCP: */ 57 if (hdmi->hdcp_ctrl) 58 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl); 59 60 /* TODO audio.. */ 61 62 return IRQ_HANDLED; 63 } 64 65 static void msm_hdmi_destroy(struct hdmi *hdmi) 66 { 67 /* 68 * at this point, hpd has been disabled, 69 * after flush workq, it's safe to deinit hdcp 70 */ 71 if (hdmi->workq) 72 destroy_workqueue(hdmi->workq); 73 msm_hdmi_hdcp_destroy(hdmi); 74 75 if (hdmi->i2c) 76 msm_hdmi_i2c_destroy(hdmi->i2c); 77 } 78 79 static void msm_hdmi_put_phy(struct hdmi *hdmi) 80 { 81 if (hdmi->phy_dev) { 82 put_device(hdmi->phy_dev); 83 hdmi->phy = NULL; 84 hdmi->phy_dev = NULL; 85 } 86 } 87 88 static int msm_hdmi_get_phy(struct hdmi *hdmi) 89 { 90 struct platform_device *pdev = hdmi->pdev; 91 struct platform_device *phy_pdev; 92 struct device_node *phy_node; 93 94 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 95 if (!phy_node) { 96 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 97 return -ENXIO; 98 } 99 100 phy_pdev = of_find_device_by_node(phy_node); 101 of_node_put(phy_node); 102 103 if (!phy_pdev) 104 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 105 106 hdmi->phy = platform_get_drvdata(phy_pdev); 107 if (!hdmi->phy) { 108 put_device(&phy_pdev->dev); 109 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 110 } 111 112 hdmi->phy_dev = &phy_pdev->dev; 113 114 return 0; 115 } 116 117 /* construct hdmi at bind/probe time, grab all the resources. If 118 * we are to EPROBE_DEFER we want to do it here, rather than later 119 * at modeset_init() time 120 */ 121 static int msm_hdmi_init(struct hdmi *hdmi) 122 { 123 struct platform_device *pdev = hdmi->pdev; 124 int ret; 125 126 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); 127 if (!hdmi->workq) { 128 ret = -ENOMEM; 129 goto fail; 130 } 131 132 hdmi->i2c = msm_hdmi_i2c_init(hdmi); 133 if (IS_ERR(hdmi->i2c)) { 134 ret = PTR_ERR(hdmi->i2c); 135 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); 136 hdmi->i2c = NULL; 137 goto fail; 138 } 139 140 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); 141 if (IS_ERR(hdmi->hdcp_ctrl)) { 142 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); 143 hdmi->hdcp_ctrl = NULL; 144 } 145 146 return 0; 147 148 fail: 149 msm_hdmi_destroy(hdmi); 150 151 return ret; 152 } 153 154 /* Second part of initialization, the drm/kms level modeset_init, 155 * constructs/initializes mode objects, etc, is called from master 156 * driver (not hdmi sub-device's probe/bind!) 157 * 158 * Any resource (regulator/clk/etc) which could be missing at boot 159 * should be handled in msm_hdmi_init() so that failure happens from 160 * hdmi sub-device's probe. 161 */ 162 int msm_hdmi_modeset_init(struct hdmi *hdmi, 163 struct drm_device *dev, struct drm_encoder *encoder) 164 { 165 int ret; 166 167 hdmi->dev = dev; 168 hdmi->encoder = encoder; 169 170 ret = msm_hdmi_bridge_init(hdmi); 171 if (ret) { 172 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); 173 goto fail; 174 } 175 176 if (hdmi->next_bridge) { 177 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge, 178 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 179 if (ret) { 180 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret); 181 goto fail; 182 } 183 } 184 185 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); 186 if (IS_ERR(hdmi->connector)) { 187 ret = PTR_ERR(hdmi->connector); 188 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); 189 hdmi->connector = NULL; 190 goto fail; 191 } 192 193 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); 194 195 ret = devm_request_irq(dev->dev, hdmi->irq, 196 msm_hdmi_irq, IRQF_TRIGGER_HIGH, 197 "hdmi_isr", hdmi); 198 if (ret < 0) { 199 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", 200 hdmi->irq, ret); 201 goto fail; 202 } 203 204 return 0; 205 206 fail: 207 if (hdmi->connector) { 208 hdmi->connector->funcs->destroy(hdmi->connector); 209 hdmi->connector = NULL; 210 } 211 212 return ret; 213 } 214 215 /* 216 * The hdmi device: 217 */ 218 219 static const char * const pwr_reg_names_8960[] = {"core-vdda"}; 220 static const char * const pwr_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 221 222 static const struct hdmi_platform_config hdmi_tx_8960_config = { 223 .pwr_reg_names = pwr_reg_names_8960, 224 .pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8960), 225 .pwr_clk_names = pwr_clk_names_8960, 226 .pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8960), 227 }; 228 229 static const char * const pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 230 static const char * const pwr_clk_names_8x74[] = {"iface", "core", "mdp_core", "alt_iface"}; 231 232 static const struct hdmi_platform_config hdmi_tx_8974_config = { 233 .pwr_reg_names = pwr_reg_names_8x74, 234 .pwr_reg_cnt = ARRAY_SIZE(pwr_reg_names_8x74), 235 .pwr_clk_names = pwr_clk_names_8x74, 236 .pwr_clk_cnt = ARRAY_SIZE(pwr_clk_names_8x74), 237 }; 238 239 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 240 { 241 struct msm_drm_private *priv = dev_get_drvdata(master); 242 struct hdmi *hdmi = dev_get_drvdata(dev); 243 int err; 244 245 err = msm_hdmi_init(hdmi); 246 if (err) 247 return err; 248 priv->kms->hdmi = hdmi; 249 250 return 0; 251 } 252 253 static void msm_hdmi_unbind(struct device *dev, struct device *master, 254 void *data) 255 { 256 struct msm_drm_private *priv = dev_get_drvdata(master); 257 258 if (priv->kms->hdmi) { 259 msm_hdmi_destroy(priv->kms->hdmi); 260 priv->kms->hdmi = NULL; 261 } 262 } 263 264 static const struct component_ops msm_hdmi_ops = { 265 .bind = msm_hdmi_bind, 266 .unbind = msm_hdmi_unbind, 267 }; 268 269 static int msm_hdmi_dev_probe(struct platform_device *pdev) 270 { 271 const struct hdmi_platform_config *config; 272 struct device *dev = &pdev->dev; 273 struct hdmi *hdmi; 274 struct resource *res; 275 int i, ret; 276 277 config = of_device_get_match_data(dev); 278 if (!config) 279 return -EINVAL; 280 281 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 282 if (!hdmi) 283 return -ENOMEM; 284 285 hdmi->pdev = pdev; 286 hdmi->config = config; 287 spin_lock_init(&hdmi->reg_lock); 288 mutex_init(&hdmi->state_mutex); 289 290 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); 291 if (ret && ret != -ENODEV) 292 return ret; 293 294 hdmi->mmio = msm_ioremap(pdev, "core_physical"); 295 if (IS_ERR(hdmi->mmio)) 296 return PTR_ERR(hdmi->mmio); 297 298 /* HDCP needs physical address of hdmi register */ 299 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 300 "core_physical"); 301 if (!res) 302 return -EINVAL; 303 hdmi->mmio_phy_addr = res->start; 304 305 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical"); 306 if (IS_ERR(hdmi->qfprom_mmio)) { 307 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 308 hdmi->qfprom_mmio = NULL; 309 } 310 311 hdmi->irq = platform_get_irq(pdev, 0); 312 if (hdmi->irq < 0) 313 return hdmi->irq; 314 315 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 316 config->pwr_reg_cnt, 317 sizeof(hdmi->pwr_regs[0]), 318 GFP_KERNEL); 319 if (!hdmi->pwr_regs) 320 return -ENOMEM; 321 322 for (i = 0; i < config->pwr_reg_cnt; i++) 323 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; 324 325 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); 326 if (ret) 327 return dev_err_probe(dev, ret, "failed to get pwr regulators\n"); 328 329 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 330 config->pwr_clk_cnt, 331 sizeof(hdmi->pwr_clks[0]), 332 GFP_KERNEL); 333 if (!hdmi->pwr_clks) 334 return -ENOMEM; 335 336 for (i = 0; i < config->pwr_clk_cnt; i++) 337 hdmi->pwr_clks[i].id = config->pwr_clk_names[i]; 338 339 ret = devm_clk_bulk_get(&pdev->dev, config->pwr_clk_cnt, hdmi->pwr_clks); 340 if (ret) 341 return ret; 342 343 hdmi->extp_clk = devm_clk_get_optional(&pdev->dev, "extp"); 344 if (IS_ERR(hdmi->extp_clk)) 345 return dev_err_probe(dev, PTR_ERR(hdmi->extp_clk), 346 "failed to get extp clock\n"); 347 348 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 349 /* This will catch e.g. -EPROBE_DEFER */ 350 if (IS_ERR(hdmi->hpd_gpiod)) 351 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod), 352 "failed to get hpd gpio\n"); 353 354 if (!hdmi->hpd_gpiod) 355 DBG("failed to get HPD gpio"); 356 357 if (hdmi->hpd_gpiod) 358 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 359 360 ret = msm_hdmi_get_phy(hdmi); 361 if (ret) { 362 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 363 return ret; 364 } 365 366 ret = devm_pm_runtime_enable(&pdev->dev); 367 if (ret) 368 goto err_put_phy; 369 370 platform_set_drvdata(pdev, hdmi); 371 372 ret = component_add(&pdev->dev, &msm_hdmi_ops); 373 if (ret) 374 goto err_put_phy; 375 376 return 0; 377 378 err_put_phy: 379 msm_hdmi_put_phy(hdmi); 380 return ret; 381 } 382 383 static void msm_hdmi_dev_remove(struct platform_device *pdev) 384 { 385 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev); 386 387 component_del(&pdev->dev, &msm_hdmi_ops); 388 389 msm_hdmi_put_phy(hdmi); 390 } 391 392 static int msm_hdmi_runtime_suspend(struct device *dev) 393 { 394 struct hdmi *hdmi = dev_get_drvdata(dev); 395 const struct hdmi_platform_config *config = hdmi->config; 396 397 clk_bulk_disable_unprepare(config->pwr_clk_cnt, hdmi->pwr_clks); 398 399 pinctrl_pm_select_sleep_state(dev); 400 401 regulator_bulk_disable(config->pwr_reg_cnt, hdmi->pwr_regs); 402 403 return 0; 404 } 405 406 static int msm_hdmi_runtime_resume(struct device *dev) 407 { 408 struct hdmi *hdmi = dev_get_drvdata(dev); 409 const struct hdmi_platform_config *config = hdmi->config; 410 int ret; 411 412 ret = regulator_bulk_enable(config->pwr_reg_cnt, hdmi->pwr_regs); 413 if (ret) 414 return ret; 415 416 ret = pinctrl_pm_select_default_state(dev); 417 if (ret) 418 goto fail; 419 420 ret = clk_bulk_prepare_enable(config->pwr_clk_cnt, hdmi->pwr_clks); 421 if (ret) 422 goto fail; 423 424 return 0; 425 426 fail: 427 pinctrl_pm_select_sleep_state(dev); 428 429 return ret; 430 } 431 432 DEFINE_RUNTIME_DEV_PM_OPS(msm_hdmi_pm_ops, msm_hdmi_runtime_suspend, msm_hdmi_runtime_resume, NULL); 433 434 static const struct of_device_id msm_hdmi_dt_match[] = { 435 { .compatible = "qcom,hdmi-tx-8998", .data = &hdmi_tx_8974_config }, 436 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, 437 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, 438 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, 439 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 440 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 441 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, 442 {} 443 }; 444 445 static struct platform_driver msm_hdmi_driver = { 446 .probe = msm_hdmi_dev_probe, 447 .remove = msm_hdmi_dev_remove, 448 .driver = { 449 .name = "hdmi_msm", 450 .of_match_table = msm_hdmi_dt_match, 451 .pm = &msm_hdmi_pm_ops, 452 }, 453 }; 454 455 void __init msm_hdmi_register(void) 456 { 457 msm_hdmi_phy_driver_register(); 458 platform_driver_register(&msm_hdmi_driver); 459 } 460 461 void __exit msm_hdmi_unregister(void) 462 { 463 platform_driver_unregister(&msm_hdmi_driver); 464 msm_hdmi_phy_driver_unregister(); 465 } 466