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 13#include <sound/hdmi-codec.h> 14#include "hdmi.h" 15 16void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on) 17{ 18 uint32_t ctrl = 0; 19 unsigned long flags; 20 21 spin_lock_irqsave(&hdmi->reg_lock, flags); 22 if (power_on) { 23 ctrl |= HDMI_CTRL_ENABLE; 24 if (!hdmi->hdmi_mode) { 25 ctrl |= HDMI_CTRL_HDMI; 26 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 27 ctrl &= ~HDMI_CTRL_HDMI; 28 } else { 29 ctrl |= HDMI_CTRL_HDMI; 30 } 31 } else { 32 ctrl = HDMI_CTRL_HDMI; 33 } 34 35 hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); 36 spin_unlock_irqrestore(&hdmi->reg_lock, flags); 37 DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", 38 power_on ? "Enable" : "Disable", ctrl); 39} 40 41static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) 42{ 43 struct hdmi *hdmi = dev_id; 44 45 /* Process HPD: */ 46 msm_hdmi_hpd_irq(hdmi->bridge); 47 48 /* Process DDC: */ 49 msm_hdmi_i2c_irq(hdmi->i2c); 50 51 /* Process HDCP: */ 52 if (hdmi->hdcp_ctrl) 53 msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl); 54 55 /* TODO audio.. */ 56 57 return IRQ_HANDLED; 58} 59 60static void msm_hdmi_destroy(struct hdmi *hdmi) 61{ 62 /* 63 * at this point, hpd has been disabled, 64 * after flush workq, it's safe to deinit hdcp 65 */ 66 if (hdmi->workq) { 67 flush_workqueue(hdmi->workq); 68 destroy_workqueue(hdmi->workq); 69 } 70 msm_hdmi_hdcp_destroy(hdmi); 71 72 if (hdmi->phy_dev) { 73 put_device(hdmi->phy_dev); 74 hdmi->phy = NULL; 75 hdmi->phy_dev = NULL; 76 } 77 78 if (hdmi->i2c) 79 msm_hdmi_i2c_destroy(hdmi->i2c); 80 81 platform_set_drvdata(hdmi->pdev, NULL); 82} 83 84static 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 if (phy_pdev) 98 hdmi->phy = platform_get_drvdata(phy_pdev); 99 100 of_node_put(phy_node); 101 102 if (!phy_pdev) { 103 DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); 104 return -EPROBE_DEFER; 105 } 106 if (!hdmi->phy) { 107 DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); 108 put_device(&phy_pdev->dev); 109 return -EPROBE_DEFER; 110 } 111 112 hdmi->phy_dev = get_device(&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 */ 121static struct hdmi *msm_hdmi_init(struct platform_device *pdev) 122{ 123 struct hdmi_platform_config *config = pdev->dev.platform_data; 124 struct hdmi *hdmi = NULL; 125 struct resource *res; 126 int i, ret; 127 128 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 129 if (!hdmi) { 130 ret = -ENOMEM; 131 goto fail; 132 } 133 134 hdmi->pdev = pdev; 135 hdmi->config = config; 136 spin_lock_init(&hdmi->reg_lock); 137 138 hdmi->mmio = msm_ioremap(pdev, config->mmio_name, "HDMI"); 139 if (IS_ERR(hdmi->mmio)) { 140 ret = PTR_ERR(hdmi->mmio); 141 goto fail; 142 } 143 144 /* HDCP needs physical address of hdmi register */ 145 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 146 config->mmio_name); 147 if (!res) { 148 ret = -EINVAL; 149 goto fail; 150 } 151 hdmi->mmio_phy_addr = res->start; 152 153 hdmi->qfprom_mmio = msm_ioremap(pdev, 154 config->qfprom_mmio_name, "HDMI_QFPROM"); 155 if (IS_ERR(hdmi->qfprom_mmio)) { 156 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 157 hdmi->qfprom_mmio = NULL; 158 } 159 160 hdmi->hpd_regs = devm_kcalloc(&pdev->dev, 161 config->hpd_reg_cnt, 162 sizeof(hdmi->hpd_regs[0]), 163 GFP_KERNEL); 164 if (!hdmi->hpd_regs) { 165 ret = -ENOMEM; 166 goto fail; 167 } 168 for (i = 0; i < config->hpd_reg_cnt; i++) { 169 struct regulator *reg; 170 171 reg = devm_regulator_get(&pdev->dev, 172 config->hpd_reg_names[i]); 173 if (IS_ERR(reg)) { 174 ret = PTR_ERR(reg); 175 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", 176 config->hpd_reg_names[i], ret); 177 goto fail; 178 } 179 180 hdmi->hpd_regs[i] = reg; 181 } 182 183 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 184 config->pwr_reg_cnt, 185 sizeof(hdmi->pwr_regs[0]), 186 GFP_KERNEL); 187 if (!hdmi->pwr_regs) { 188 ret = -ENOMEM; 189 goto fail; 190 } 191 for (i = 0; i < config->pwr_reg_cnt; i++) { 192 struct regulator *reg; 193 194 reg = devm_regulator_get(&pdev->dev, 195 config->pwr_reg_names[i]); 196 if (IS_ERR(reg)) { 197 ret = PTR_ERR(reg); 198 DRM_DEV_ERROR(&pdev->dev, "failed to get pwr regulator: %s (%d)\n", 199 config->pwr_reg_names[i], ret); 200 goto fail; 201 } 202 203 hdmi->pwr_regs[i] = reg; 204 } 205 206 hdmi->hpd_clks = devm_kcalloc(&pdev->dev, 207 config->hpd_clk_cnt, 208 sizeof(hdmi->hpd_clks[0]), 209 GFP_KERNEL); 210 if (!hdmi->hpd_clks) { 211 ret = -ENOMEM; 212 goto fail; 213 } 214 for (i = 0; i < config->hpd_clk_cnt; i++) { 215 struct clk *clk; 216 217 clk = msm_clk_get(pdev, config->hpd_clk_names[i]); 218 if (IS_ERR(clk)) { 219 ret = PTR_ERR(clk); 220 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd clk: %s (%d)\n", 221 config->hpd_clk_names[i], ret); 222 goto fail; 223 } 224 225 hdmi->hpd_clks[i] = clk; 226 } 227 228 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 229 config->pwr_clk_cnt, 230 sizeof(hdmi->pwr_clks[0]), 231 GFP_KERNEL); 232 if (!hdmi->pwr_clks) { 233 ret = -ENOMEM; 234 goto fail; 235 } 236 for (i = 0; i < config->pwr_clk_cnt; i++) { 237 struct clk *clk; 238 239 clk = msm_clk_get(pdev, config->pwr_clk_names[i]); 240 if (IS_ERR(clk)) { 241 ret = PTR_ERR(clk); 242 DRM_DEV_ERROR(&pdev->dev, "failed to get pwr clk: %s (%d)\n", 243 config->pwr_clk_names[i], ret); 244 goto fail; 245 } 246 247 hdmi->pwr_clks[i] = clk; 248 } 249 250 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 251 /* This will catch e.g. -EPROBE_DEFER */ 252 if (IS_ERR(hdmi->hpd_gpiod)) { 253 ret = PTR_ERR(hdmi->hpd_gpiod); 254 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd gpio: (%d)\n", ret); 255 goto fail; 256 } 257 258 if (!hdmi->hpd_gpiod) 259 DBG("failed to get HPD gpio"); 260 261 if (hdmi->hpd_gpiod) 262 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 263 264 pm_runtime_enable(&pdev->dev); 265 266 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); 267 if (!hdmi->workq) { 268 ret = -ENOMEM; 269 goto fail; 270 } 271 272 hdmi->i2c = msm_hdmi_i2c_init(hdmi); 273 if (IS_ERR(hdmi->i2c)) { 274 ret = PTR_ERR(hdmi->i2c); 275 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); 276 hdmi->i2c = NULL; 277 goto fail; 278 } 279 280 ret = msm_hdmi_get_phy(hdmi); 281 if (ret) { 282 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 283 goto fail; 284 } 285 286 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); 287 if (IS_ERR(hdmi->hdcp_ctrl)) { 288 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); 289 hdmi->hdcp_ctrl = NULL; 290 } 291 292 return hdmi; 293 294fail: 295 if (hdmi) 296 msm_hdmi_destroy(hdmi); 297 298 return ERR_PTR(ret); 299} 300 301/* Second part of initialization, the drm/kms level modeset_init, 302 * constructs/initializes mode objects, etc, is called from master 303 * driver (not hdmi sub-device's probe/bind!) 304 * 305 * Any resource (regulator/clk/etc) which could be missing at boot 306 * should be handled in msm_hdmi_init() so that failure happens from 307 * hdmi sub-device's probe. 308 */ 309int msm_hdmi_modeset_init(struct hdmi *hdmi, 310 struct drm_device *dev, struct drm_encoder *encoder) 311{ 312 struct msm_drm_private *priv = dev->dev_private; 313 struct platform_device *pdev = hdmi->pdev; 314 int ret; 315 316 if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) { 317 DRM_DEV_ERROR(dev->dev, "too many bridges\n"); 318 return -ENOSPC; 319 } 320 321 hdmi->dev = dev; 322 hdmi->encoder = encoder; 323 324 hdmi_audio_infoframe_init(&hdmi->audio.infoframe); 325 326 hdmi->bridge = msm_hdmi_bridge_init(hdmi); 327 if (IS_ERR(hdmi->bridge)) { 328 ret = PTR_ERR(hdmi->bridge); 329 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); 330 hdmi->bridge = NULL; 331 goto fail; 332 } 333 334 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); 335 if (IS_ERR(hdmi->connector)) { 336 ret = PTR_ERR(hdmi->connector); 337 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); 338 hdmi->connector = NULL; 339 goto fail; 340 } 341 342 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); 343 344 hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); 345 if (!hdmi->irq) { 346 ret = -EINVAL; 347 DRM_DEV_ERROR(dev->dev, "failed to get irq\n"); 348 goto fail; 349 } 350 351 ret = devm_request_irq(dev->dev, hdmi->irq, 352 msm_hdmi_irq, IRQF_TRIGGER_HIGH, 353 "hdmi_isr", hdmi); 354 if (ret < 0) { 355 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", 356 hdmi->irq, ret); 357 goto fail; 358 } 359 360 drm_bridge_connector_enable_hpd(hdmi->connector); 361 362 ret = msm_hdmi_hpd_enable(hdmi->bridge); 363 if (ret < 0) { 364 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); 365 goto fail; 366 } 367 368 priv->bridges[priv->num_bridges++] = hdmi->bridge; 369 priv->connectors[priv->num_connectors++] = hdmi->connector; 370 371 platform_set_drvdata(pdev, hdmi); 372 373 return 0; 374 375fail: 376 /* bridge is normally destroyed by drm: */ 377 if (hdmi->bridge) { 378 msm_hdmi_bridge_destroy(hdmi->bridge); 379 hdmi->bridge = NULL; 380 } 381 if (hdmi->connector) { 382 hdmi->connector->funcs->destroy(hdmi->connector); 383 hdmi->connector = NULL; 384 } 385 386 return ret; 387} 388 389/* 390 * The hdmi device: 391 */ 392 393#define HDMI_CFG(item, entry) \ 394 .item ## _names = item ##_names_ ## entry, \ 395 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry) 396 397static const char *pwr_reg_names_none[] = {}; 398static const char *hpd_reg_names_none[] = {}; 399 400static struct hdmi_platform_config hdmi_tx_8660_config; 401 402static const char *hpd_reg_names_8960[] = {"core-vdda", "hdmi-mux"}; 403static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 404 405static struct hdmi_platform_config hdmi_tx_8960_config = { 406 HDMI_CFG(hpd_reg, 8960), 407 HDMI_CFG(hpd_clk, 8960), 408}; 409 410static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 411static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"}; 412static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"}; 413static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"}; 414static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0}; 415 416static struct hdmi_platform_config hdmi_tx_8974_config = { 417 HDMI_CFG(pwr_reg, 8x74), 418 HDMI_CFG(hpd_reg, 8x74), 419 HDMI_CFG(pwr_clk, 8x74), 420 HDMI_CFG(hpd_clk, 8x74), 421 .hpd_freq = hpd_clk_freq_8x74, 422}; 423 424static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"}; 425 426static struct hdmi_platform_config hdmi_tx_8084_config = { 427 HDMI_CFG(pwr_reg, 8x74), 428 HDMI_CFG(hpd_reg, 8084), 429 HDMI_CFG(pwr_clk, 8x74), 430 HDMI_CFG(hpd_clk, 8x74), 431 .hpd_freq = hpd_clk_freq_8x74, 432}; 433 434static struct hdmi_platform_config hdmi_tx_8994_config = { 435 HDMI_CFG(pwr_reg, 8x74), 436 HDMI_CFG(hpd_reg, none), 437 HDMI_CFG(pwr_clk, 8x74), 438 HDMI_CFG(hpd_clk, 8x74), 439 .hpd_freq = hpd_clk_freq_8x74, 440}; 441 442static struct hdmi_platform_config hdmi_tx_8996_config = { 443 HDMI_CFG(pwr_reg, none), 444 HDMI_CFG(hpd_reg, none), 445 HDMI_CFG(pwr_clk, 8x74), 446 HDMI_CFG(hpd_clk, 8x74), 447 .hpd_freq = hpd_clk_freq_8x74, 448}; 449 450/* 451 * HDMI audio codec callbacks 452 */ 453static int msm_hdmi_audio_hw_params(struct device *dev, void *data, 454 struct hdmi_codec_daifmt *daifmt, 455 struct hdmi_codec_params *params) 456{ 457 struct hdmi *hdmi = dev_get_drvdata(dev); 458 unsigned int chan; 459 unsigned int channel_allocation = 0; 460 unsigned int rate; 461 unsigned int level_shift = 0; /* 0dB */ 462 bool down_mix = false; 463 464 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate, 465 params->sample_width, params->cea.channels); 466 467 switch (params->cea.channels) { 468 case 2: 469 /* FR and FL speakers */ 470 channel_allocation = 0; 471 chan = MSM_HDMI_AUDIO_CHANNEL_2; 472 break; 473 case 4: 474 /* FC, LFE, FR and FL speakers */ 475 channel_allocation = 0x3; 476 chan = MSM_HDMI_AUDIO_CHANNEL_4; 477 break; 478 case 6: 479 /* RR, RL, FC, LFE, FR and FL speakers */ 480 channel_allocation = 0x0B; 481 chan = MSM_HDMI_AUDIO_CHANNEL_6; 482 break; 483 case 8: 484 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */ 485 channel_allocation = 0x1F; 486 chan = MSM_HDMI_AUDIO_CHANNEL_8; 487 break; 488 default: 489 return -EINVAL; 490 } 491 492 switch (params->sample_rate) { 493 case 32000: 494 rate = HDMI_SAMPLE_RATE_32KHZ; 495 break; 496 case 44100: 497 rate = HDMI_SAMPLE_RATE_44_1KHZ; 498 break; 499 case 48000: 500 rate = HDMI_SAMPLE_RATE_48KHZ; 501 break; 502 case 88200: 503 rate = HDMI_SAMPLE_RATE_88_2KHZ; 504 break; 505 case 96000: 506 rate = HDMI_SAMPLE_RATE_96KHZ; 507 break; 508 case 176400: 509 rate = HDMI_SAMPLE_RATE_176_4KHZ; 510 break; 511 case 192000: 512 rate = HDMI_SAMPLE_RATE_192KHZ; 513 break; 514 default: 515 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n", 516 params->sample_rate); 517 return -EINVAL; 518 } 519 520 msm_hdmi_audio_set_sample_rate(hdmi, rate); 521 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation, 522 level_shift, down_mix); 523 524 return 0; 525} 526 527static void msm_hdmi_audio_shutdown(struct device *dev, void *data) 528{ 529 struct hdmi *hdmi = dev_get_drvdata(dev); 530 531 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0); 532} 533 534static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = { 535 .hw_params = msm_hdmi_audio_hw_params, 536 .audio_shutdown = msm_hdmi_audio_shutdown, 537}; 538 539static struct hdmi_codec_pdata codec_data = { 540 .ops = &msm_hdmi_audio_codec_ops, 541 .max_i2s_channels = 8, 542 .i2s = 1, 543}; 544 545static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev) 546{ 547 hdmi->audio_pdev = platform_device_register_data(dev, 548 HDMI_CODEC_DRV_NAME, 549 PLATFORM_DEVID_AUTO, 550 &codec_data, 551 sizeof(codec_data)); 552 return PTR_ERR_OR_ZERO(hdmi->audio_pdev); 553} 554 555static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 556{ 557 struct drm_device *drm = dev_get_drvdata(master); 558 struct msm_drm_private *priv = drm->dev_private; 559 struct hdmi_platform_config *hdmi_cfg; 560 struct hdmi *hdmi; 561 struct device_node *of_node = dev->of_node; 562 int err; 563 564 hdmi_cfg = (struct hdmi_platform_config *) 565 of_device_get_match_data(dev); 566 if (!hdmi_cfg) { 567 DRM_DEV_ERROR(dev, "unknown hdmi_cfg: %pOFn\n", of_node); 568 return -ENXIO; 569 } 570 571 hdmi_cfg->mmio_name = "core_physical"; 572 hdmi_cfg->qfprom_mmio_name = "qfprom_physical"; 573 574 dev->platform_data = hdmi_cfg; 575 576 hdmi = msm_hdmi_init(to_platform_device(dev)); 577 if (IS_ERR(hdmi)) 578 return PTR_ERR(hdmi); 579 priv->hdmi = hdmi; 580 581 err = msm_hdmi_register_audio_driver(hdmi, dev); 582 if (err) { 583 DRM_ERROR("Failed to attach an audio codec %d\n", err); 584 hdmi->audio_pdev = NULL; 585 } 586 587 return 0; 588} 589 590static void msm_hdmi_unbind(struct device *dev, struct device *master, 591 void *data) 592{ 593 struct drm_device *drm = dev_get_drvdata(master); 594 struct msm_drm_private *priv = drm->dev_private; 595 if (priv->hdmi) { 596 if (priv->hdmi->audio_pdev) 597 platform_device_unregister(priv->hdmi->audio_pdev); 598 599 msm_hdmi_destroy(priv->hdmi); 600 priv->hdmi = NULL; 601 } 602} 603 604static const struct component_ops msm_hdmi_ops = { 605 .bind = msm_hdmi_bind, 606 .unbind = msm_hdmi_unbind, 607}; 608 609static int msm_hdmi_dev_probe(struct platform_device *pdev) 610{ 611 return component_add(&pdev->dev, &msm_hdmi_ops); 612} 613 614static int msm_hdmi_dev_remove(struct platform_device *pdev) 615{ 616 component_del(&pdev->dev, &msm_hdmi_ops); 617 return 0; 618} 619 620static const struct of_device_id msm_hdmi_dt_match[] = { 621 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8996_config }, 622 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8994_config }, 623 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8084_config }, 624 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 625 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 626 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8660_config }, 627 {} 628}; 629 630static struct platform_driver msm_hdmi_driver = { 631 .probe = msm_hdmi_dev_probe, 632 .remove = msm_hdmi_dev_remove, 633 .driver = { 634 .name = "hdmi_msm", 635 .of_match_table = msm_hdmi_dt_match, 636 }, 637}; 638 639void __init msm_hdmi_register(void) 640{ 641 msm_hdmi_phy_driver_register(); 642 platform_driver_register(&msm_hdmi_driver); 643} 644 645void __exit msm_hdmi_unregister(void) 646{ 647 platform_driver_unregister(&msm_hdmi_driver); 648 msm_hdmi_phy_driver_unregister(); 649} 650