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/of_irq.h> 9 #include <linux/of_gpio.h> 10 11 #include <drm/drm_bridge_connector.h> 12 #include <drm/drm_of.h> 13 14 #include <sound/hdmi-codec.h> 15 #include "hdmi.h" 16 17 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on) 18 { 19 uint32_t ctrl = 0; 20 unsigned long flags; 21 22 spin_lock_irqsave(&hdmi->reg_lock, flags); 23 if (power_on) { 24 ctrl |= HDMI_CTRL_ENABLE; 25 if (!hdmi->hdmi_mode) { 26 ctrl |= HDMI_CTRL_HDMI; 27 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 28 ctrl &= ~HDMI_CTRL_HDMI; 29 } else { 30 ctrl |= HDMI_CTRL_HDMI; 31 } 32 } else { 33 ctrl = HDMI_CTRL_HDMI; 34 } 35 36 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 37 spin_unlock_irqrestore(&hdmi->reg_lock, flags); 38 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", 39 power_on ? "Enable" : "Disable", ctrl); 40 } 41 42 static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) 43 { 44 struct hdmi *hdmi = dev_id; 45 46 /* Process HPD: */ 47 msm_hdmi_hpd_irq(hdmi->bridge); 48 49 /* Process DDC: */ 50 msm_hdmi_i2c_irq(hdmi->i2c); 51 52 /* Process HDCP: */ 53 if (hdmi->hdcp_ctrl) 54 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl); 55 56 /* TODO audio.. */ 57 58 return IRQ_HANDLED; 59 } 60 61 static void msm_hdmi_destroy(struct hdmi *hdmi) 62 { 63 /* 64 * at this point, hpd has been disabled, 65 * after flush workq, it's safe to deinit hdcp 66 */ 67 if (hdmi->workq) 68 destroy_workqueue(hdmi->workq); 69 msm_hdmi_hdcp_destroy(hdmi); 70 71 if (hdmi->i2c) 72 msm_hdmi_i2c_destroy(hdmi->i2c); 73 } 74 75 static void msm_hdmi_put_phy(struct hdmi *hdmi) 76 { 77 if (hdmi->phy_dev) { 78 put_device(hdmi->phy_dev); 79 hdmi->phy = NULL; 80 hdmi->phy_dev = NULL; 81 } 82 } 83 84 static int msm_hdmi_get_phy(struct hdmi *hdmi) 85 { 86 struct platform_device *pdev = hdmi->pdev; 87 struct platform_device *phy_pdev; 88 struct device_node *phy_node; 89 90 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 91 if (!phy_node) { 92 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 93 return -ENXIO; 94 } 95 96 phy_pdev = of_find_device_by_node(phy_node); 97 of_node_put(phy_node); 98 99 if (!phy_pdev) 100 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 101 102 hdmi->phy = platform_get_drvdata(phy_pdev); 103 if (!hdmi->phy) { 104 put_device(&phy_pdev->dev); 105 return dev_err_probe(&pdev->dev, -EPROBE_DEFER, "phy driver is not ready\n"); 106 } 107 108 hdmi->phy_dev = &phy_pdev->dev; 109 110 return 0; 111 } 112 113 /* construct hdmi at bind/probe time, grab all the resources. If 114 * we are to EPROBE_DEFER we want to do it here, rather than later 115 * at modeset_init() time 116 */ 117 static int msm_hdmi_init(struct hdmi *hdmi) 118 { 119 struct platform_device *pdev = hdmi->pdev; 120 int ret; 121 122 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); 123 124 hdmi->i2c = msm_hdmi_i2c_init(hdmi); 125 if (IS_ERR(hdmi->i2c)) { 126 ret = PTR_ERR(hdmi->i2c); 127 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); 128 hdmi->i2c = NULL; 129 goto fail; 130 } 131 132 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); 133 if (IS_ERR(hdmi->hdcp_ctrl)) { 134 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); 135 hdmi->hdcp_ctrl = NULL; 136 } 137 138 return 0; 139 140 fail: 141 msm_hdmi_destroy(hdmi); 142 143 return ret; 144 } 145 146 /* Second part of initialization, the drm/kms level modeset_init, 147 * constructs/initializes mode objects, etc, is called from master 148 * driver (not hdmi sub-device's probe/bind!) 149 * 150 * Any resource (regulator/clk/etc) which could be missing at boot 151 * should be handled in msm_hdmi_init() so that failure happens from 152 * hdmi sub-device's probe. 153 */ 154 int msm_hdmi_modeset_init(struct hdmi *hdmi, 155 struct drm_device *dev, struct drm_encoder *encoder) 156 { 157 struct msm_drm_private *priv = dev->dev_private; 158 int ret; 159 160 if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) { 161 DRM_DEV_ERROR(dev->dev, "too many bridges\n"); 162 return -ENOSPC; 163 } 164 165 hdmi->dev = dev; 166 hdmi->encoder = encoder; 167 168 hdmi_audio_infoframe_init(&hdmi->audio.infoframe); 169 170 hdmi->bridge = msm_hdmi_bridge_init(hdmi); 171 if (IS_ERR(hdmi->bridge)) { 172 ret = PTR_ERR(hdmi->bridge); 173 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); 174 hdmi->bridge = NULL; 175 goto fail; 176 } 177 178 if (hdmi->next_bridge) { 179 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge, 180 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 181 if (ret) { 182 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret); 183 goto fail; 184 } 185 } 186 187 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); 188 if (IS_ERR(hdmi->connector)) { 189 ret = PTR_ERR(hdmi->connector); 190 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); 191 hdmi->connector = NULL; 192 goto fail; 193 } 194 195 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); 196 197 ret = devm_request_irq(dev->dev, hdmi->irq, 198 msm_hdmi_irq, IRQF_TRIGGER_HIGH, 199 "hdmi_isr", hdmi); 200 if (ret < 0) { 201 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", 202 hdmi->irq, ret); 203 goto fail; 204 } 205 206 ret = msm_hdmi_hpd_enable(hdmi->bridge); 207 if (ret < 0) { 208 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); 209 goto fail; 210 } 211 212 priv->bridges[priv->num_bridges++] = hdmi->bridge; 213 214 return 0; 215 216 fail: 217 /* bridge is normally destroyed by drm: */ 218 if (hdmi->bridge) { 219 msm_hdmi_bridge_destroy(hdmi->bridge); 220 hdmi->bridge = NULL; 221 } 222 if (hdmi->connector) { 223 hdmi->connector->funcs->destroy(hdmi->connector); 224 hdmi->connector = NULL; 225 } 226 227 return ret; 228 } 229 230 /* 231 * The hdmi device: 232 */ 233 234 #define HDMI_CFG(item, entry) \ 235 .item ## _names = item ##_names_ ## entry, \ 236 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry) 237 238 static const char *hpd_reg_names_8960[] = {"core-vdda"}; 239 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 240 241 static const struct hdmi_platform_config hdmi_tx_8960_config = { 242 HDMI_CFG(hpd_reg, 8960), 243 HDMI_CFG(hpd_clk, 8960), 244 }; 245 246 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 247 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"}; 248 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"}; 249 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0}; 250 251 static const struct hdmi_platform_config hdmi_tx_8974_config = { 252 HDMI_CFG(pwr_reg, 8x74), 253 HDMI_CFG(pwr_clk, 8x74), 254 HDMI_CFG(hpd_clk, 8x74), 255 .hpd_freq = hpd_clk_freq_8x74, 256 }; 257 258 /* 259 * HDMI audio codec callbacks 260 */ 261 static int msm_hdmi_audio_hw_params(struct device *dev, void *data, 262 struct hdmi_codec_daifmt *daifmt, 263 struct hdmi_codec_params *params) 264 { 265 struct hdmi *hdmi = dev_get_drvdata(dev); 266 unsigned int chan; 267 unsigned int channel_allocation = 0; 268 unsigned int rate; 269 unsigned int level_shift = 0; /* 0dB */ 270 bool down_mix = false; 271 272 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate, 273 params->sample_width, params->cea.channels); 274 275 switch (params->cea.channels) { 276 case 2: 277 /* FR and FL speakers */ 278 channel_allocation = 0; 279 chan = MSM_HDMI_AUDIO_CHANNEL_2; 280 break; 281 case 4: 282 /* FC, LFE, FR and FL speakers */ 283 channel_allocation = 0x3; 284 chan = MSM_HDMI_AUDIO_CHANNEL_4; 285 break; 286 case 6: 287 /* RR, RL, FC, LFE, FR and FL speakers */ 288 channel_allocation = 0x0B; 289 chan = MSM_HDMI_AUDIO_CHANNEL_6; 290 break; 291 case 8: 292 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */ 293 channel_allocation = 0x1F; 294 chan = MSM_HDMI_AUDIO_CHANNEL_8; 295 break; 296 default: 297 return -EINVAL; 298 } 299 300 switch (params->sample_rate) { 301 case 32000: 302 rate = HDMI_SAMPLE_RATE_32KHZ; 303 break; 304 case 44100: 305 rate = HDMI_SAMPLE_RATE_44_1KHZ; 306 break; 307 case 48000: 308 rate = HDMI_SAMPLE_RATE_48KHZ; 309 break; 310 case 88200: 311 rate = HDMI_SAMPLE_RATE_88_2KHZ; 312 break; 313 case 96000: 314 rate = HDMI_SAMPLE_RATE_96KHZ; 315 break; 316 case 176400: 317 rate = HDMI_SAMPLE_RATE_176_4KHZ; 318 break; 319 case 192000: 320 rate = HDMI_SAMPLE_RATE_192KHZ; 321 break; 322 default: 323 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n", 324 params->sample_rate); 325 return -EINVAL; 326 } 327 328 msm_hdmi_audio_set_sample_rate(hdmi, rate); 329 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation, 330 level_shift, down_mix); 331 332 return 0; 333 } 334 335 static void msm_hdmi_audio_shutdown(struct device *dev, void *data) 336 { 337 struct hdmi *hdmi = dev_get_drvdata(dev); 338 339 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0); 340 } 341 342 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = { 343 .hw_params = msm_hdmi_audio_hw_params, 344 .audio_shutdown = msm_hdmi_audio_shutdown, 345 }; 346 347 static struct hdmi_codec_pdata codec_data = { 348 .ops = &msm_hdmi_audio_codec_ops, 349 .max_i2s_channels = 8, 350 .i2s = 1, 351 }; 352 353 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev) 354 { 355 hdmi->audio_pdev = platform_device_register_data(dev, 356 HDMI_CODEC_DRV_NAME, 357 PLATFORM_DEVID_AUTO, 358 &codec_data, 359 sizeof(codec_data)); 360 return PTR_ERR_OR_ZERO(hdmi->audio_pdev); 361 } 362 363 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 364 { 365 struct msm_drm_private *priv = dev_get_drvdata(master); 366 struct hdmi *hdmi = dev_get_drvdata(dev); 367 int err; 368 369 err = msm_hdmi_init(hdmi); 370 if (err) 371 return err; 372 priv->hdmi = hdmi; 373 374 err = msm_hdmi_register_audio_driver(hdmi, dev); 375 if (err) { 376 DRM_ERROR("Failed to attach an audio codec %d\n", err); 377 hdmi->audio_pdev = NULL; 378 } 379 380 return 0; 381 } 382 383 static void msm_hdmi_unbind(struct device *dev, struct device *master, 384 void *data) 385 { 386 struct msm_drm_private *priv = dev_get_drvdata(master); 387 388 if (priv->hdmi) { 389 if (priv->hdmi->audio_pdev) 390 platform_device_unregister(priv->hdmi->audio_pdev); 391 392 msm_hdmi_destroy(priv->hdmi); 393 priv->hdmi = NULL; 394 } 395 } 396 397 static const struct component_ops msm_hdmi_ops = { 398 .bind = msm_hdmi_bind, 399 .unbind = msm_hdmi_unbind, 400 }; 401 402 static int msm_hdmi_dev_probe(struct platform_device *pdev) 403 { 404 const struct hdmi_platform_config *config; 405 struct device *dev = &pdev->dev; 406 struct hdmi *hdmi; 407 struct resource *res; 408 int i, ret; 409 410 config = of_device_get_match_data(dev); 411 if (!config) 412 return -EINVAL; 413 414 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 415 if (!hdmi) 416 return -ENOMEM; 417 418 hdmi->pdev = pdev; 419 hdmi->config = config; 420 spin_lock_init(&hdmi->reg_lock); 421 422 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); 423 if (ret && ret != -ENODEV) 424 return ret; 425 426 hdmi->mmio = msm_ioremap(pdev, "core_physical"); 427 if (IS_ERR(hdmi->mmio)) 428 return PTR_ERR(hdmi->mmio); 429 430 /* HDCP needs physical address of hdmi register */ 431 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 432 "core_physical"); 433 if (!res) 434 return -EINVAL; 435 hdmi->mmio_phy_addr = res->start; 436 437 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical"); 438 if (IS_ERR(hdmi->qfprom_mmio)) { 439 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 440 hdmi->qfprom_mmio = NULL; 441 } 442 443 hdmi->irq = platform_get_irq(pdev, 0); 444 if (hdmi->irq < 0) 445 return hdmi->irq; 446 447 hdmi->hpd_regs = devm_kcalloc(&pdev->dev, 448 config->hpd_reg_cnt, 449 sizeof(hdmi->hpd_regs[0]), 450 GFP_KERNEL); 451 if (!hdmi->hpd_regs) 452 return -ENOMEM; 453 454 for (i = 0; i < config->hpd_reg_cnt; i++) 455 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i]; 456 457 ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs); 458 if (ret) 459 return dev_err_probe(dev, ret, "failed to get hpd regulators\n"); 460 461 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 462 config->pwr_reg_cnt, 463 sizeof(hdmi->pwr_regs[0]), 464 GFP_KERNEL); 465 if (!hdmi->pwr_regs) 466 return -ENOMEM; 467 468 for (i = 0; i < config->pwr_reg_cnt; i++) 469 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; 470 471 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); 472 if (ret) 473 return dev_err_probe(dev, ret, "failed to get pwr regulators\n"); 474 475 hdmi->hpd_clks = devm_kcalloc(&pdev->dev, 476 config->hpd_clk_cnt, 477 sizeof(hdmi->hpd_clks[0]), 478 GFP_KERNEL); 479 if (!hdmi->hpd_clks) 480 return -ENOMEM; 481 482 for (i = 0; i < config->hpd_clk_cnt; i++) { 483 struct clk *clk; 484 485 clk = msm_clk_get(pdev, config->hpd_clk_names[i]); 486 if (IS_ERR(clk)) 487 return dev_err_probe(dev, PTR_ERR(clk), 488 "failed to get hpd clk: %s\n", 489 config->hpd_clk_names[i]); 490 491 hdmi->hpd_clks[i] = clk; 492 } 493 494 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 495 config->pwr_clk_cnt, 496 sizeof(hdmi->pwr_clks[0]), 497 GFP_KERNEL); 498 if (!hdmi->pwr_clks) 499 return -ENOMEM; 500 501 for (i = 0; i < config->pwr_clk_cnt; i++) { 502 struct clk *clk; 503 504 clk = msm_clk_get(pdev, config->pwr_clk_names[i]); 505 if (IS_ERR(clk)) 506 return dev_err_probe(dev, PTR_ERR(clk), 507 "failed to get pwr clk: %s\n", 508 config->pwr_clk_names[i]); 509 510 hdmi->pwr_clks[i] = clk; 511 } 512 513 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 514 /* This will catch e.g. -EPROBE_DEFER */ 515 if (IS_ERR(hdmi->hpd_gpiod)) 516 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod), 517 "failed to get hpd gpio\n"); 518 519 if (!hdmi->hpd_gpiod) 520 DBG("failed to get HPD gpio"); 521 522 if (hdmi->hpd_gpiod) 523 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 524 525 ret = msm_hdmi_get_phy(hdmi); 526 if (ret) { 527 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 528 return ret; 529 } 530 531 ret = devm_pm_runtime_enable(&pdev->dev); 532 if (ret) 533 goto err_put_phy; 534 535 platform_set_drvdata(pdev, hdmi); 536 537 ret = component_add(&pdev->dev, &msm_hdmi_ops); 538 if (ret) 539 goto err_put_phy; 540 541 return 0; 542 543 err_put_phy: 544 msm_hdmi_put_phy(hdmi); 545 return ret; 546 } 547 548 static int msm_hdmi_dev_remove(struct platform_device *pdev) 549 { 550 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev); 551 552 component_del(&pdev->dev, &msm_hdmi_ops); 553 554 msm_hdmi_put_phy(hdmi); 555 556 return 0; 557 } 558 559 static const struct of_device_id msm_hdmi_dt_match[] = { 560 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, 561 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, 562 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, 563 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 564 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 565 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, 566 {} 567 }; 568 569 static struct platform_driver msm_hdmi_driver = { 570 .probe = msm_hdmi_dev_probe, 571 .remove = msm_hdmi_dev_remove, 572 .driver = { 573 .name = "hdmi_msm", 574 .of_match_table = msm_hdmi_dt_match, 575 }, 576 }; 577 578 void __init msm_hdmi_register(void) 579 { 580 msm_hdmi_phy_driver_register(); 581 platform_driver_register(&msm_hdmi_driver); 582 } 583 584 void __exit msm_hdmi_unregister(void) 585 { 586 platform_driver_unregister(&msm_hdmi_driver); 587 msm_hdmi_phy_driver_unregister(); 588 } 589