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