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 drm_bridge_connector_enable_hpd(hdmi->connector); 207 208 ret = msm_hdmi_hpd_enable(hdmi->bridge); 209 if (ret < 0) { 210 DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); 211 goto fail; 212 } 213 214 priv->bridges[priv->num_bridges++] = hdmi->bridge; 215 216 return 0; 217 218 fail: 219 /* bridge is normally destroyed by drm: */ 220 if (hdmi->bridge) { 221 msm_hdmi_bridge_destroy(hdmi->bridge); 222 hdmi->bridge = NULL; 223 } 224 if (hdmi->connector) { 225 hdmi->connector->funcs->destroy(hdmi->connector); 226 hdmi->connector = NULL; 227 } 228 229 return ret; 230 } 231 232 /* 233 * The hdmi device: 234 */ 235 236 #define HDMI_CFG(item, entry) \ 237 .item ## _names = item ##_names_ ## entry, \ 238 .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry) 239 240 static const char *hpd_reg_names_8960[] = {"core-vdda"}; 241 static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; 242 243 static const struct hdmi_platform_config hdmi_tx_8960_config = { 244 HDMI_CFG(hpd_reg, 8960), 245 HDMI_CFG(hpd_clk, 8960), 246 }; 247 248 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; 249 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"}; 250 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"}; 251 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0}; 252 253 static const struct hdmi_platform_config hdmi_tx_8974_config = { 254 HDMI_CFG(pwr_reg, 8x74), 255 HDMI_CFG(pwr_clk, 8x74), 256 HDMI_CFG(hpd_clk, 8x74), 257 .hpd_freq = hpd_clk_freq_8x74, 258 }; 259 260 /* 261 * HDMI audio codec callbacks 262 */ 263 static int msm_hdmi_audio_hw_params(struct device *dev, void *data, 264 struct hdmi_codec_daifmt *daifmt, 265 struct hdmi_codec_params *params) 266 { 267 struct hdmi *hdmi = dev_get_drvdata(dev); 268 unsigned int chan; 269 unsigned int channel_allocation = 0; 270 unsigned int rate; 271 unsigned int level_shift = 0; /* 0dB */ 272 bool down_mix = false; 273 274 DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate, 275 params->sample_width, params->cea.channels); 276 277 switch (params->cea.channels) { 278 case 2: 279 /* FR and FL speakers */ 280 channel_allocation = 0; 281 chan = MSM_HDMI_AUDIO_CHANNEL_2; 282 break; 283 case 4: 284 /* FC, LFE, FR and FL speakers */ 285 channel_allocation = 0x3; 286 chan = MSM_HDMI_AUDIO_CHANNEL_4; 287 break; 288 case 6: 289 /* RR, RL, FC, LFE, FR and FL speakers */ 290 channel_allocation = 0x0B; 291 chan = MSM_HDMI_AUDIO_CHANNEL_6; 292 break; 293 case 8: 294 /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */ 295 channel_allocation = 0x1F; 296 chan = MSM_HDMI_AUDIO_CHANNEL_8; 297 break; 298 default: 299 return -EINVAL; 300 } 301 302 switch (params->sample_rate) { 303 case 32000: 304 rate = HDMI_SAMPLE_RATE_32KHZ; 305 break; 306 case 44100: 307 rate = HDMI_SAMPLE_RATE_44_1KHZ; 308 break; 309 case 48000: 310 rate = HDMI_SAMPLE_RATE_48KHZ; 311 break; 312 case 88200: 313 rate = HDMI_SAMPLE_RATE_88_2KHZ; 314 break; 315 case 96000: 316 rate = HDMI_SAMPLE_RATE_96KHZ; 317 break; 318 case 176400: 319 rate = HDMI_SAMPLE_RATE_176_4KHZ; 320 break; 321 case 192000: 322 rate = HDMI_SAMPLE_RATE_192KHZ; 323 break; 324 default: 325 DRM_DEV_ERROR(dev, "rate[%d] not supported!\n", 326 params->sample_rate); 327 return -EINVAL; 328 } 329 330 msm_hdmi_audio_set_sample_rate(hdmi, rate); 331 msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation, 332 level_shift, down_mix); 333 334 return 0; 335 } 336 337 static void msm_hdmi_audio_shutdown(struct device *dev, void *data) 338 { 339 struct hdmi *hdmi = dev_get_drvdata(dev); 340 341 msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0); 342 } 343 344 static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = { 345 .hw_params = msm_hdmi_audio_hw_params, 346 .audio_shutdown = msm_hdmi_audio_shutdown, 347 }; 348 349 static struct hdmi_codec_pdata codec_data = { 350 .ops = &msm_hdmi_audio_codec_ops, 351 .max_i2s_channels = 8, 352 .i2s = 1, 353 }; 354 355 static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev) 356 { 357 hdmi->audio_pdev = platform_device_register_data(dev, 358 HDMI_CODEC_DRV_NAME, 359 PLATFORM_DEVID_AUTO, 360 &codec_data, 361 sizeof(codec_data)); 362 return PTR_ERR_OR_ZERO(hdmi->audio_pdev); 363 } 364 365 static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) 366 { 367 struct msm_drm_private *priv = dev_get_drvdata(master); 368 struct hdmi *hdmi = dev_get_drvdata(dev); 369 int err; 370 371 err = msm_hdmi_init(hdmi); 372 if (err) 373 return err; 374 priv->hdmi = hdmi; 375 376 err = msm_hdmi_register_audio_driver(hdmi, dev); 377 if (err) { 378 DRM_ERROR("Failed to attach an audio codec %d\n", err); 379 hdmi->audio_pdev = NULL; 380 } 381 382 return 0; 383 } 384 385 static void msm_hdmi_unbind(struct device *dev, struct device *master, 386 void *data) 387 { 388 struct msm_drm_private *priv = dev_get_drvdata(master); 389 390 if (priv->hdmi) { 391 if (priv->hdmi->audio_pdev) 392 platform_device_unregister(priv->hdmi->audio_pdev); 393 394 msm_hdmi_destroy(priv->hdmi); 395 priv->hdmi = NULL; 396 } 397 } 398 399 static const struct component_ops msm_hdmi_ops = { 400 .bind = msm_hdmi_bind, 401 .unbind = msm_hdmi_unbind, 402 }; 403 404 static int msm_hdmi_dev_probe(struct platform_device *pdev) 405 { 406 const struct hdmi_platform_config *config; 407 struct device *dev = &pdev->dev; 408 struct hdmi *hdmi; 409 struct resource *res; 410 int i, ret; 411 412 config = of_device_get_match_data(dev); 413 if (!config) 414 return -EINVAL; 415 416 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 417 if (!hdmi) 418 return -ENOMEM; 419 420 hdmi->pdev = pdev; 421 hdmi->config = config; 422 spin_lock_init(&hdmi->reg_lock); 423 424 ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); 425 if (ret && ret != -ENODEV) 426 return ret; 427 428 hdmi->mmio = msm_ioremap(pdev, "core_physical"); 429 if (IS_ERR(hdmi->mmio)) 430 return PTR_ERR(hdmi->mmio); 431 432 /* HDCP needs physical address of hdmi register */ 433 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, 434 "core_physical"); 435 if (!res) 436 return -EINVAL; 437 hdmi->mmio_phy_addr = res->start; 438 439 hdmi->qfprom_mmio = msm_ioremap(pdev, "qfprom_physical"); 440 if (IS_ERR(hdmi->qfprom_mmio)) { 441 DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); 442 hdmi->qfprom_mmio = NULL; 443 } 444 445 hdmi->irq = platform_get_irq(pdev, 0); 446 if (hdmi->irq < 0) 447 return hdmi->irq; 448 449 hdmi->hpd_regs = devm_kcalloc(&pdev->dev, 450 config->hpd_reg_cnt, 451 sizeof(hdmi->hpd_regs[0]), 452 GFP_KERNEL); 453 if (!hdmi->hpd_regs) 454 return -ENOMEM; 455 456 for (i = 0; i < config->hpd_reg_cnt; i++) 457 hdmi->hpd_regs[i].supply = config->hpd_reg_names[i]; 458 459 ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs); 460 if (ret) 461 return dev_err_probe(dev, ret, "failed to get hpd regulators\n"); 462 463 hdmi->pwr_regs = devm_kcalloc(&pdev->dev, 464 config->pwr_reg_cnt, 465 sizeof(hdmi->pwr_regs[0]), 466 GFP_KERNEL); 467 if (!hdmi->pwr_regs) 468 return -ENOMEM; 469 470 for (i = 0; i < config->pwr_reg_cnt; i++) 471 hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; 472 473 ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); 474 if (ret) 475 return dev_err_probe(dev, ret, "failed to get pwr regulators\n"); 476 477 hdmi->hpd_clks = devm_kcalloc(&pdev->dev, 478 config->hpd_clk_cnt, 479 sizeof(hdmi->hpd_clks[0]), 480 GFP_KERNEL); 481 if (!hdmi->hpd_clks) 482 return -ENOMEM; 483 484 for (i = 0; i < config->hpd_clk_cnt; i++) { 485 struct clk *clk; 486 487 clk = msm_clk_get(pdev, config->hpd_clk_names[i]); 488 if (IS_ERR(clk)) 489 return dev_err_probe(dev, PTR_ERR(clk), 490 "failed to get hpd clk: %s\n", 491 config->hpd_clk_names[i]); 492 493 hdmi->hpd_clks[i] = clk; 494 } 495 496 hdmi->pwr_clks = devm_kcalloc(&pdev->dev, 497 config->pwr_clk_cnt, 498 sizeof(hdmi->pwr_clks[0]), 499 GFP_KERNEL); 500 if (!hdmi->pwr_clks) 501 return -ENOMEM; 502 503 for (i = 0; i < config->pwr_clk_cnt; i++) { 504 struct clk *clk; 505 506 clk = msm_clk_get(pdev, config->pwr_clk_names[i]); 507 if (IS_ERR(clk)) 508 return dev_err_probe(dev, PTR_ERR(clk), 509 "failed to get pwr clk: %s\n", 510 config->pwr_clk_names[i]); 511 512 hdmi->pwr_clks[i] = clk; 513 } 514 515 hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); 516 /* This will catch e.g. -EPROBE_DEFER */ 517 if (IS_ERR(hdmi->hpd_gpiod)) 518 return dev_err_probe(dev, PTR_ERR(hdmi->hpd_gpiod), 519 "failed to get hpd gpio\n"); 520 521 if (!hdmi->hpd_gpiod) 522 DBG("failed to get HPD gpio"); 523 524 if (hdmi->hpd_gpiod) 525 gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); 526 527 ret = msm_hdmi_get_phy(hdmi); 528 if (ret) { 529 DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); 530 return ret; 531 } 532 533 ret = devm_pm_runtime_enable(&pdev->dev); 534 if (ret) 535 return ret; 536 537 platform_set_drvdata(pdev, hdmi); 538 539 return component_add(&pdev->dev, &msm_hdmi_ops); 540 } 541 542 static int msm_hdmi_dev_remove(struct platform_device *pdev) 543 { 544 struct hdmi *hdmi = dev_get_drvdata(&pdev->dev); 545 546 component_del(&pdev->dev, &msm_hdmi_ops); 547 548 msm_hdmi_put_phy(hdmi); 549 550 return 0; 551 } 552 553 static const struct of_device_id msm_hdmi_dt_match[] = { 554 { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, 555 { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, 556 { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, 557 { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, 558 { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, 559 { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, 560 {} 561 }; 562 563 static struct platform_driver msm_hdmi_driver = { 564 .probe = msm_hdmi_dev_probe, 565 .remove = msm_hdmi_dev_remove, 566 .driver = { 567 .name = "hdmi_msm", 568 .of_match_table = msm_hdmi_dt_match, 569 }, 570 }; 571 572 void __init msm_hdmi_register(void) 573 { 574 msm_hdmi_phy_driver_register(); 575 platform_driver_register(&msm_hdmi_driver); 576 } 577 578 void __exit msm_hdmi_unregister(void) 579 { 580 platform_driver_unregister(&msm_hdmi_driver); 581 msm_hdmi_phy_driver_unregister(); 582 } 583