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->phy_dev) { 72 put_device(hdmi->phy_dev); 73 hdmi->phy = NULL; 74 hdmi->phy_dev = NULL; 75 } 76 77 if (hdmi->i2c) 78 msm_hdmi_i2c_destroy(hdmi->i2c); 79 80 platform_set_drvdata(hdmi->pdev, NULL); 81 } 82 83 static int msm_hdmi_get_phy(struct hdmi *hdmi) 84 { 85 struct platform_device *pdev = hdmi->pdev; 86 struct platform_device *phy_pdev; 87 struct device_node *phy_node; 88 89 phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); 90 if (!phy_node) { 91 DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); 92 return -ENXIO; 93 } 94 95 phy_pdev = of_find_device_by_node(phy_node); 96 if (phy_pdev) 97 hdmi->phy = platform_get_drvdata(phy_pdev); 98 99 of_node_put(phy_node); 100 101 if (!phy_pdev) { 102 DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); 103 return -EPROBE_DEFER; 104 } 105 if (!hdmi->phy) { 106 DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); 107 put_device(&phy_pdev->dev); 108 return -EPROBE_DEFER; 109 } 110 111 hdmi->phy_dev = get_device(&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 struct hdmi *msm_hdmi_init(struct platform_device *pdev) 121 { 122 struct hdmi_platform_config *config = pdev->dev.platform_data; 123 struct hdmi *hdmi = NULL; 124 struct resource *res; 125 int i, ret; 126 127 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 128 if (!hdmi) { 129 ret = -ENOMEM; 130 goto fail; 131 } 132 133 hdmi->pdev = pdev; 134 hdmi->config = config; 135 spin_lock_init(&hdmi->reg_lock); 136 137 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); 138 if (ret && ret != -ENODEV) 139 goto fail; 140 141 hdmi->mmio = msm_ioremap(pdev, config->mmio_name); 142 if (IS_ERR(hdmi->mmio)) { 143 ret = PTR_ERR(hdmi->mmio); 144 goto fail; 145 } 146 147 /* HDCP needs physical address of hdmi register */ 148 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 149 config->mmio_name); 150 if (!res) { 151 ret = -EINVAL; 152 goto fail; 153 } 154 hdmi->mmio_phy_addr = res->start; 155 156 hdmi->qfprom_mmio = msm_ioremap(pdev, config->qfprom_mmio_name); 157 if (IS_ERR(hdmi->qfprom_mmio)) { 158 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 159 hdmi->qfprom_mmio = NULL; 160 } 161 162 hdmi->hpd_regs = devm_kcalloc(&pdev->dev, 163 config->hpd_reg_cnt, 164 sizeof(hdmi->hpd_regs[0]), 165 GFP_KERNEL); 166 if (!hdmi->hpd_regs) { 167 ret = -ENOMEM; 168 goto fail; 169 } 170 for (i = 0; i < config->hpd_reg_cnt; i++) 171 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i]; 172 173 ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs); 174 if (ret) { 175 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %d\n", ret); 176 goto fail; 177 } 178 179 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 180 config->pwr_reg_cnt, 181 sizeof(hdmi->pwr_regs[0]), 182 GFP_KERNEL); 183 if (!hdmi->pwr_regs) { 184 ret = -ENOMEM; 185 goto fail; 186 } 187 188 for (i = 0; i < config->pwr_reg_cnt; i++) 189 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; 190 191 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); 192 if (ret) { 193 DRM_DEV_ERROR(&pdev->dev, "failed to get pwr regulator: %d\n", ret); 194 goto fail; 195 } 196 197 hdmi->hpd_clks = devm_kcalloc(&pdev->dev, 198 config->hpd_clk_cnt, 199 sizeof(hdmi->hpd_clks[0]), 200 GFP_KERNEL); 201 if (!hdmi->hpd_clks) { 202 ret = -ENOMEM; 203 goto fail; 204 } 205 for (i = 0; i < config->hpd_clk_cnt; i++) { 206 struct clk *clk; 207 208 clk = msm_clk_get(pdev, config->hpd_clk_names[i]); 209 if (IS_ERR(clk)) { 210 ret = PTR_ERR(clk); 211 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd clk: %s (%d)\n", 212 config->hpd_clk_names[i], ret); 213 goto fail; 214 } 215 216 hdmi->hpd_clks[i] = clk; 217 } 218 219 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 220 config->pwr_clk_cnt, 221 sizeof(hdmi->pwr_clks[0]), 222 GFP_KERNEL); 223 if (!hdmi->pwr_clks) { 224 ret = -ENOMEM; 225 goto fail; 226 } 227 for (i = 0; i < config->pwr_clk_cnt; i++) { 228 struct clk *clk; 229 230 clk = msm_clk_get(pdev, config->pwr_clk_names[i]); 231 if (IS_ERR(clk)) { 232 ret = PTR_ERR(clk); 233 DRM_DEV_ERROR(&pdev->dev, "failed to get pwr clk: %s (%d)\n", 234 config->pwr_clk_names[i], ret); 235 goto fail; 236 } 237 238 hdmi->pwr_clks[i] = clk; 239 } 240 241 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 242 /* This will catch e.g. -EPROBE_DEFER */ 243 if (IS_ERR(hdmi->hpd_gpiod)) { 244 ret = PTR_ERR(hdmi->hpd_gpiod); 245 DRM_DEV_ERROR(&pdev->dev, "failed to get hpd gpio: (%d)\n", ret); 246 goto fail; 247 } 248 249 if (!hdmi->hpd_gpiod) 250 DBG("failed to get HPD gpio"); 251 252 if (hdmi->hpd_gpiod) 253 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 254 255 pm_runtime_enable(&pdev->dev); 256 257 hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); 258 259 hdmi->i2c = msm_hdmi_i2c_init(hdmi); 260 if (IS_ERR(hdmi->i2c)) { 261 ret = PTR_ERR(hdmi->i2c); 262 DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); 263 hdmi->i2c = NULL; 264 goto fail; 265 } 266 267 ret = msm_hdmi_get_phy(hdmi); 268 if (ret) { 269 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 270 goto fail; 271 } 272 273 hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); 274 if (IS_ERR(hdmi->hdcp_ctrl)) { 275 dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); 276 hdmi->hdcp_ctrl = NULL; 277 } 278 279 return hdmi; 280 281 fail: 282 if (hdmi) 283 msm_hdmi_destroy(hdmi); 284 285 return ERR_PTR(ret); 286 } 287 288 /* Second part of initialization, the drm/kms level modeset_init, 289 * constructs/initializes mode objects, etc, is called from master 290 * driver (not hdmi sub-device's probe/bind!) 291 * 292 * Any resource (regulator/clk/etc) which could be missing at boot 293 * should be handled in msm_hdmi_init() so that failure happens from 294 * hdmi sub-device's probe. 295 */ 296 int msm_hdmi_modeset_init(struct hdmi *hdmi, 297 struct drm_device *dev, struct drm_encoder *encoder) 298 { 299 struct msm_drm_private *priv = dev->dev_private; 300 struct platform_device *pdev = hdmi->pdev; 301 int ret; 302 303 hdmi->dev = dev; 304 hdmi->encoder = encoder; 305 306 hdmi_audio_infoframe_init(&hdmi->audio.infoframe); 307 308 hdmi->bridge = msm_hdmi_bridge_init(hdmi); 309 if (IS_ERR(hdmi->bridge)) { 310 ret = PTR_ERR(hdmi->bridge); 311 DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); 312 hdmi->bridge = NULL; 313 goto fail; 314 } 315 316 if (hdmi->next_bridge) { 317 ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge, 318 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 319 if (ret) { 320 DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret); 321 goto fail; 322 } 323 } 324 325 hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); 326 if (IS_ERR(hdmi->connector)) { 327 ret = PTR_ERR(hdmi->connector); 328 DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); 329 hdmi->connector = NULL; 330 goto fail; 331 } 332 333 drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); 334 335 hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); 336 if (!hdmi->irq) { 337 ret = -EINVAL; 338 DRM_DEV_ERROR(dev->dev, "failed to get irq\n"); 339 goto fail; 340 } 341 342 ret = devm_request_irq(&pdev->dev, hdmi->irq, 343 msm_hdmi_irq, IRQF_TRIGGER_HIGH, 344 "hdmi_isr", hdmi); 345 if (ret < 0) { 346 DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", 347 hdmi->irq, ret); 348 goto fail; 349 } 350 351 drm_bridge_connector_enable_hpd(hdmi->connector); 352 353 ret = msm_hdmi_hpd_enable(hdmi->bridge); 354 if (ret < 0) { 355 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); 356 goto fail; 357 } 358 359 priv->bridges[priv->num_bridges++] = hdmi->bridge; 360 361 platform_set_drvdata(pdev, hdmi); 362 363 return 0; 364 365 fail: 366 /* bridge is normally destroyed by drm: */ 367 if (hdmi->bridge) { 368 msm_hdmi_bridge_destroy(hdmi->bridge); 369 hdmi->bridge = NULL; 370 } 371 if (hdmi->connector) { 372 hdmi->connector->funcs->destroy(hdmi->connector); 373 hdmi->connector = NULL; 374 } 375 376 return ret; 377 } 378 379 /* 380 * The hdmi device: 381 */ 382 383 #define HDMI_CFG(item, entry) \ 384 .item ## _names = item ##_names_ ## entry, \ 385 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry) 386 387 static const char *hpd_reg_names_8960[] = {"core-vdda"}; 388 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 389 390 static struct hdmi_platform_config hdmi_tx_8960_config = { 391 HDMI_CFG(hpd_reg, 8960), 392 HDMI_CFG(hpd_clk, 8960), 393 }; 394 395 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 396 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"}; 397 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"}; 398 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0}; 399 400 static struct hdmi_platform_config hdmi_tx_8974_config = { 401 HDMI_CFG(pwr_reg, 8x74), 402 HDMI_CFG(pwr_clk, 8x74), 403 HDMI_CFG(hpd_clk, 8x74), 404 .hpd_freq = hpd_clk_freq_8x74, 405 }; 406 407 /* 408 * HDMI audio codec callbacks 409 */ 410 static int msm_hdmi_audio_hw_params(struct device *dev, void *data, 411 struct hdmi_codec_daifmt *daifmt, 412 struct hdmi_codec_params *params) 413 { 414 struct hdmi *hdmi = dev_get_drvdata(dev); 415 unsigned int chan; 416 unsigned int channel_allocation = 0; 417 unsigned int rate; 418 unsigned int level_shift = 0; /* 0dB */ 419 bool down_mix = false; 420 421 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate, 422 params->sample_width, params->cea.channels); 423 424 switch (params->cea.channels) { 425 case 2: 426 /* FR and FL speakers */ 427 channel_allocation = 0; 428 chan = MSM_HDMI_AUDIO_CHANNEL_2; 429 break; 430 case 4: 431 /* FC, LFE, FR and FL speakers */ 432 channel_allocation = 0x3; 433 chan = MSM_HDMI_AUDIO_CHANNEL_4; 434 break; 435 case 6: 436 /* RR, RL, FC, LFE, FR and FL speakers */ 437 channel_allocation = 0x0B; 438 chan = MSM_HDMI_AUDIO_CHANNEL_6; 439 break; 440 case 8: 441 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */ 442 channel_allocation = 0x1F; 443 chan = MSM_HDMI_AUDIO_CHANNEL_8; 444 break; 445 default: 446 return -EINVAL; 447 } 448 449 switch (params->sample_rate) { 450 case 32000: 451 rate = HDMI_SAMPLE_RATE_32KHZ; 452 break; 453 case 44100: 454 rate = HDMI_SAMPLE_RATE_44_1KHZ; 455 break; 456 case 48000: 457 rate = HDMI_SAMPLE_RATE_48KHZ; 458 break; 459 case 88200: 460 rate = HDMI_SAMPLE_RATE_88_2KHZ; 461 break; 462 case 96000: 463 rate = HDMI_SAMPLE_RATE_96KHZ; 464 break; 465 case 176400: 466 rate = HDMI_SAMPLE_RATE_176_4KHZ; 467 break; 468 case 192000: 469 rate = HDMI_SAMPLE_RATE_192KHZ; 470 break; 471 default: 472 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n", 473 params->sample_rate); 474 return -EINVAL; 475 } 476 477 msm_hdmi_audio_set_sample_rate(hdmi, rate); 478 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation, 479 level_shift, down_mix); 480 481 return 0; 482 } 483 484 static void msm_hdmi_audio_shutdown(struct device *dev, void *data) 485 { 486 struct hdmi *hdmi = dev_get_drvdata(dev); 487 488 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0); 489 } 490 491 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = { 492 .hw_params = msm_hdmi_audio_hw_params, 493 .audio_shutdown = msm_hdmi_audio_shutdown, 494 }; 495 496 static struct hdmi_codec_pdata codec_data = { 497 .ops = &msm_hdmi_audio_codec_ops, 498 .max_i2s_channels = 8, 499 .i2s = 1, 500 }; 501 502 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev) 503 { 504 hdmi->audio_pdev = platform_device_register_data(dev, 505 HDMI_CODEC_DRV_NAME, 506 PLATFORM_DEVID_AUTO, 507 &codec_data, 508 sizeof(codec_data)); 509 return PTR_ERR_OR_ZERO(hdmi->audio_pdev); 510 } 511 512 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 513 { 514 struct msm_drm_private *priv = dev_get_drvdata(master); 515 struct hdmi_platform_config *hdmi_cfg; 516 struct hdmi *hdmi; 517 struct device_node *of_node = dev->of_node; 518 int err; 519 520 hdmi_cfg = (struct hdmi_platform_config *) 521 of_device_get_match_data(dev); 522 if (!hdmi_cfg) { 523 DRM_DEV_ERROR(dev, "unknown hdmi_cfg: %pOFn\n", of_node); 524 return -ENXIO; 525 } 526 527 hdmi_cfg->mmio_name = "core_physical"; 528 hdmi_cfg->qfprom_mmio_name = "qfprom_physical"; 529 530 dev->platform_data = hdmi_cfg; 531 532 hdmi = msm_hdmi_init(to_platform_device(dev)); 533 if (IS_ERR(hdmi)) 534 return PTR_ERR(hdmi); 535 priv->hdmi = hdmi; 536 537 err = msm_hdmi_register_audio_driver(hdmi, dev); 538 if (err) { 539 DRM_ERROR("Failed to attach an audio codec %d\n", err); 540 hdmi->audio_pdev = NULL; 541 } 542 543 return 0; 544 } 545 546 static void msm_hdmi_unbind(struct device *dev, struct device *master, 547 void *data) 548 { 549 struct msm_drm_private *priv = dev_get_drvdata(master); 550 551 if (priv->hdmi) { 552 if (priv->hdmi->audio_pdev) 553 platform_device_unregister(priv->hdmi->audio_pdev); 554 555 msm_hdmi_destroy(priv->hdmi); 556 priv->hdmi = NULL; 557 } 558 } 559 560 static const struct component_ops msm_hdmi_ops = { 561 .bind = msm_hdmi_bind, 562 .unbind = msm_hdmi_unbind, 563 }; 564 565 static int msm_hdmi_dev_probe(struct platform_device *pdev) 566 { 567 return component_add(&pdev->dev, &msm_hdmi_ops); 568 } 569 570 static int msm_hdmi_dev_remove(struct platform_device *pdev) 571 { 572 component_del(&pdev->dev, &msm_hdmi_ops); 573 return 0; 574 } 575 576 static const struct of_device_id msm_hdmi_dt_match[] = { 577 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, 578 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, 579 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, 580 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 581 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 582 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, 583 {} 584 }; 585 586 static struct platform_driver msm_hdmi_driver = { 587 .probe = msm_hdmi_dev_probe, 588 .remove = msm_hdmi_dev_remove, 589 .driver = { 590 .name = "hdmi_msm", 591 .of_match_table = msm_hdmi_dt_match, 592 }, 593 }; 594 595 void __init msm_hdmi_register(void) 596 { 597 msm_hdmi_phy_driver_register(); 598 platform_driver_register(&msm_hdmi_driver); 599 } 600 601 void __exit msm_hdmi_unregister(void) 602 { 603 platform_driver_unregister(&msm_hdmi_driver); 604 msm_hdmi_phy_driver_unregister(); 605 } 606