1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018, The Linux Foundation. All rights reserved. 4 * Copyright (c) 2019-2020. Linaro Limited. 5 */ 6 7 #include <linux/firmware.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/interrupt.h> 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/of_graph.h> 13 #include <linux/platform_device.h> 14 #include <linux/regmap.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/wait.h> 17 #include <linux/workqueue.h> 18 19 #include <sound/hdmi-codec.h> 20 21 #include <drm/drm_atomic_helper.h> 22 #include <drm/drm_bridge.h> 23 #include <drm/drm_mipi_dsi.h> 24 #include <drm/drm_print.h> 25 #include <drm/drm_probe_helper.h> 26 27 #define EDID_BLOCK_SIZE 128 28 #define EDID_NUM_BLOCKS 2 29 30 struct lt9611uxc { 31 struct device *dev; 32 struct drm_bridge bridge; 33 struct drm_connector connector; 34 35 struct regmap *regmap; 36 /* Protects all accesses to registers by stopping the on-chip MCU */ 37 struct mutex ocm_lock; 38 39 struct wait_queue_head wq; 40 struct work_struct work; 41 42 struct device_node *dsi0_node; 43 struct device_node *dsi1_node; 44 struct mipi_dsi_device *dsi0; 45 struct mipi_dsi_device *dsi1; 46 struct platform_device *audio_pdev; 47 48 struct gpio_desc *reset_gpio; 49 struct gpio_desc *enable_gpio; 50 51 struct regulator_bulk_data supplies[2]; 52 53 struct i2c_client *client; 54 55 bool hpd_supported; 56 bool edid_read; 57 /* can be accessed from different threads, so protect this with ocm_lock */ 58 bool hdmi_connected; 59 uint8_t fw_version; 60 }; 61 62 #define LT9611_PAGE_CONTROL 0xff 63 64 static const struct regmap_range_cfg lt9611uxc_ranges[] = { 65 { 66 .name = "register_range", 67 .range_min = 0, 68 .range_max = 0xd0ff, 69 .selector_reg = LT9611_PAGE_CONTROL, 70 .selector_mask = 0xff, 71 .selector_shift = 0, 72 .window_start = 0, 73 .window_len = 0x100, 74 }, 75 }; 76 77 static const struct regmap_config lt9611uxc_regmap_config = { 78 .reg_bits = 8, 79 .val_bits = 8, 80 .max_register = 0xffff, 81 .ranges = lt9611uxc_ranges, 82 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges), 83 }; 84 85 struct lt9611uxc_mode { 86 u16 hdisplay; 87 u16 vdisplay; 88 u8 vrefresh; 89 }; 90 91 /* 92 * This chip supports only a fixed set of modes. 93 * Enumerate them here to check whether the mode is supported. 94 */ 95 static struct lt9611uxc_mode lt9611uxc_modes[] = { 96 { 1920, 1080, 60 }, 97 { 1920, 1080, 30 }, 98 { 1920, 1080, 25 }, 99 { 1366, 768, 60 }, 100 { 1360, 768, 60 }, 101 { 1280, 1024, 60 }, 102 { 1280, 800, 60 }, 103 { 1280, 720, 60 }, 104 { 1280, 720, 50 }, 105 { 1280, 720, 30 }, 106 { 1152, 864, 60 }, 107 { 1024, 768, 60 }, 108 { 800, 600, 60 }, 109 { 720, 576, 50 }, 110 { 720, 480, 60 }, 111 { 640, 480, 60 }, 112 }; 113 114 static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge) 115 { 116 return container_of(bridge, struct lt9611uxc, bridge); 117 } 118 119 static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector) 120 { 121 return container_of(connector, struct lt9611uxc, connector); 122 } 123 124 static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc) 125 { 126 mutex_lock(<9611uxc->ocm_lock); 127 regmap_write(lt9611uxc->regmap, 0x80ee, 0x01); 128 } 129 130 static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc) 131 { 132 regmap_write(lt9611uxc->regmap, 0x80ee, 0x00); 133 msleep(50); 134 mutex_unlock(<9611uxc->ocm_lock); 135 } 136 137 static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) 138 { 139 struct lt9611uxc *lt9611uxc = dev_id; 140 unsigned int irq_status = 0; 141 unsigned int hpd_status = 0; 142 143 lt9611uxc_lock(lt9611uxc); 144 145 regmap_read(lt9611uxc->regmap, 0xb022, &irq_status); 146 regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status); 147 if (irq_status) 148 regmap_write(lt9611uxc->regmap, 0xb022, 0); 149 150 if (irq_status & BIT(0)) { 151 lt9611uxc->edid_read = !!(hpd_status & BIT(0)); 152 wake_up_all(<9611uxc->wq); 153 } 154 155 if (irq_status & BIT(1)) { 156 lt9611uxc->hdmi_connected = hpd_status & BIT(1); 157 schedule_work(<9611uxc->work); 158 } 159 160 lt9611uxc_unlock(lt9611uxc); 161 162 return IRQ_HANDLED; 163 } 164 165 static void lt9611uxc_hpd_work(struct work_struct *work) 166 { 167 struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work); 168 bool connected; 169 170 if (lt9611uxc->connector.dev) { 171 if (lt9611uxc->connector.dev->mode_config.funcs) 172 drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); 173 } else { 174 175 mutex_lock(<9611uxc->ocm_lock); 176 connected = lt9611uxc->hdmi_connected; 177 mutex_unlock(<9611uxc->ocm_lock); 178 179 drm_bridge_hpd_notify(<9611uxc->bridge, 180 connected ? 181 connector_status_connected : 182 connector_status_disconnected); 183 } 184 } 185 186 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) 187 { 188 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 189 msleep(20); 190 191 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0); 192 msleep(20); 193 194 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 195 msleep(300); 196 } 197 198 static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc) 199 { 200 if (!lt9611uxc->enable_gpio) 201 return; 202 203 gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1); 204 msleep(20); 205 } 206 207 static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc) 208 { 209 int ret; 210 211 lt9611uxc->supplies[0].supply = "vdd"; 212 lt9611uxc->supplies[1].supply = "vcc"; 213 214 ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies); 215 if (ret < 0) 216 return ret; 217 218 return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000); 219 } 220 221 static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc) 222 { 223 int ret; 224 225 ret = regulator_enable(lt9611uxc->supplies[0].consumer); 226 if (ret < 0) 227 return ret; 228 229 usleep_range(1000, 10000); /* 50000 according to dtsi */ 230 231 ret = regulator_enable(lt9611uxc->supplies[1].consumer); 232 if (ret < 0) { 233 regulator_disable(lt9611uxc->supplies[0].consumer); 234 return ret; 235 } 236 237 return 0; 238 } 239 240 static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode) 241 { 242 int i; 243 244 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) { 245 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay && 246 lt9611uxc_modes[i].vdisplay == mode->vdisplay && 247 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 248 return <9611uxc_modes[i]; 249 } 250 } 251 252 return NULL; 253 } 254 255 static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc, 256 struct device_node *dsi_node) 257 { 258 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL }; 259 struct mipi_dsi_device *dsi; 260 struct mipi_dsi_host *host; 261 int ret; 262 263 host = of_find_mipi_dsi_host_by_node(dsi_node); 264 if (!host) { 265 dev_err(lt9611uxc->dev, "failed to find dsi host\n"); 266 return ERR_PTR(-EPROBE_DEFER); 267 } 268 269 dsi = mipi_dsi_device_register_full(host, &info); 270 if (IS_ERR(dsi)) { 271 dev_err(lt9611uxc->dev, "failed to create dsi device\n"); 272 return dsi; 273 } 274 275 dsi->lanes = 4; 276 dsi->format = MIPI_DSI_FMT_RGB888; 277 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 278 MIPI_DSI_MODE_VIDEO_HSE; 279 280 ret = mipi_dsi_attach(dsi); 281 if (ret < 0) { 282 dev_err(lt9611uxc->dev, "failed to attach dsi to host\n"); 283 mipi_dsi_device_unregister(dsi); 284 return ERR_PTR(ret); 285 } 286 287 return dsi; 288 } 289 290 static int lt9611uxc_connector_get_modes(struct drm_connector *connector) 291 { 292 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 293 unsigned int count; 294 struct edid *edid; 295 296 edid = lt9611uxc->bridge.funcs->get_edid(<9611uxc->bridge, connector); 297 drm_connector_update_edid_property(connector, edid); 298 count = drm_add_edid_modes(connector, edid); 299 kfree(edid); 300 301 return count; 302 } 303 304 static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector, 305 bool force) 306 { 307 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 308 309 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge); 310 } 311 312 static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector, 313 struct drm_display_mode *mode) 314 { 315 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode); 316 317 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 318 } 319 320 static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = { 321 .get_modes = lt9611uxc_connector_get_modes, 322 .mode_valid = lt9611uxc_connector_mode_valid, 323 }; 324 325 static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = { 326 .fill_modes = drm_helper_probe_single_connector_modes, 327 .detect = lt9611uxc_connector_detect, 328 .destroy = drm_connector_cleanup, 329 .reset = drm_atomic_helper_connector_reset, 330 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 331 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 332 }; 333 334 static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc) 335 { 336 int ret; 337 338 if (!bridge->encoder) { 339 DRM_ERROR("Parent encoder object not found"); 340 return -ENODEV; 341 } 342 343 lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD; 344 345 drm_connector_helper_add(<9611uxc->connector, 346 <9611uxc_bridge_connector_helper_funcs); 347 ret = drm_connector_init(bridge->dev, <9611uxc->connector, 348 <9611uxc_bridge_connector_funcs, 349 DRM_MODE_CONNECTOR_HDMIA); 350 if (ret) { 351 DRM_ERROR("Failed to initialize connector with drm\n"); 352 return ret; 353 } 354 355 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder); 356 } 357 358 static void lt9611uxc_bridge_detach(struct drm_bridge *bridge) 359 { 360 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 361 362 if (lt9611uxc->dsi1) { 363 mipi_dsi_detach(lt9611uxc->dsi1); 364 mipi_dsi_device_unregister(lt9611uxc->dsi1); 365 } 366 367 mipi_dsi_detach(lt9611uxc->dsi0); 368 mipi_dsi_device_unregister(lt9611uxc->dsi0); 369 } 370 371 static int lt9611uxc_bridge_attach(struct drm_bridge *bridge, 372 enum drm_bridge_attach_flags flags) 373 { 374 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 375 int ret; 376 377 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 378 ret = lt9611uxc_connector_init(bridge, lt9611uxc); 379 if (ret < 0) 380 return ret; 381 } 382 383 /* Attach primary DSI */ 384 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node); 385 if (IS_ERR(lt9611uxc->dsi0)) 386 return PTR_ERR(lt9611uxc->dsi0); 387 388 /* Attach secondary DSI, if specified */ 389 if (lt9611uxc->dsi1_node) { 390 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node); 391 if (IS_ERR(lt9611uxc->dsi1)) { 392 ret = PTR_ERR(lt9611uxc->dsi1); 393 goto err_unregister_dsi0; 394 } 395 } 396 397 return 0; 398 399 err_unregister_dsi0: 400 mipi_dsi_detach(lt9611uxc->dsi0); 401 mipi_dsi_device_unregister(lt9611uxc->dsi0); 402 403 return ret; 404 } 405 406 static enum drm_mode_status 407 lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge, 408 const struct drm_display_info *info, 409 const struct drm_display_mode *mode) 410 { 411 struct lt9611uxc_mode *lt9611uxc_mode; 412 413 lt9611uxc_mode = lt9611uxc_find_mode(mode); 414 415 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 416 } 417 418 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 419 const struct drm_display_mode *mode) 420 { 421 u32 h_total, hactive, hsync_len, hfront_porch; 422 u32 v_total, vactive, vsync_len, vfront_porch; 423 424 h_total = mode->htotal; 425 v_total = mode->vtotal; 426 427 hactive = mode->hdisplay; 428 hsync_len = mode->hsync_end - mode->hsync_start; 429 hfront_porch = mode->hsync_start - mode->hdisplay; 430 431 vactive = mode->vdisplay; 432 vsync_len = mode->vsync_end - mode->vsync_start; 433 vfront_porch = mode->vsync_start - mode->vdisplay; 434 435 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 436 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 437 438 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 439 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 440 441 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 442 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 443 444 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 445 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 446 447 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 448 449 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 450 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 451 452 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 453 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 454 455 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 456 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 457 } 458 459 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 460 const struct drm_display_mode *mode, 461 const struct drm_display_mode *adj_mode) 462 { 463 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 464 465 lt9611uxc_lock(lt9611uxc); 466 lt9611uxc_video_setup(lt9611uxc, mode); 467 lt9611uxc_unlock(lt9611uxc); 468 } 469 470 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 471 { 472 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 473 unsigned int reg_val = 0; 474 int ret; 475 bool connected = true; 476 477 lt9611uxc_lock(lt9611uxc); 478 479 if (lt9611uxc->hpd_supported) { 480 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 481 482 if (ret) 483 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 484 else 485 connected = reg_val & BIT(1); 486 } 487 lt9611uxc->hdmi_connected = connected; 488 489 lt9611uxc_unlock(lt9611uxc); 490 491 return connected ? connector_status_connected : 492 connector_status_disconnected; 493 } 494 495 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc) 496 { 497 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read, 498 msecs_to_jiffies(500)); 499 } 500 501 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 502 { 503 struct lt9611uxc *lt9611uxc = data; 504 int ret; 505 506 if (len > EDID_BLOCK_SIZE) 507 return -EINVAL; 508 509 if (block >= EDID_NUM_BLOCKS) 510 return -EINVAL; 511 512 lt9611uxc_lock(lt9611uxc); 513 514 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10); 515 516 regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE); 517 518 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len); 519 if (ret) 520 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret); 521 522 lt9611uxc_unlock(lt9611uxc); 523 524 return 0; 525 }; 526 527 static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, 528 struct drm_connector *connector) 529 { 530 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 531 int ret; 532 533 ret = lt9611uxc_wait_for_edid(lt9611uxc); 534 if (ret < 0) { 535 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret); 536 return NULL; 537 } else if (ret == 0) { 538 dev_err(lt9611uxc->dev, "wait for EDID timeout\n"); 539 return NULL; 540 } 541 542 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); 543 } 544 545 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = { 546 .attach = lt9611uxc_bridge_attach, 547 .detach = lt9611uxc_bridge_detach, 548 .mode_valid = lt9611uxc_bridge_mode_valid, 549 .mode_set = lt9611uxc_bridge_mode_set, 550 .detect = lt9611uxc_bridge_detect, 551 .get_edid = lt9611uxc_bridge_get_edid, 552 }; 553 554 static int lt9611uxc_parse_dt(struct device *dev, 555 struct lt9611uxc *lt9611uxc) 556 { 557 lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 558 if (!lt9611uxc->dsi0_node) { 559 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n"); 560 return -ENODEV; 561 } 562 563 lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 564 565 return 0; 566 } 567 568 static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc) 569 { 570 struct device *dev = lt9611uxc->dev; 571 572 lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 573 if (IS_ERR(lt9611uxc->reset_gpio)) { 574 dev_err(dev, "failed to acquire reset gpio\n"); 575 return PTR_ERR(lt9611uxc->reset_gpio); 576 } 577 578 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 579 if (IS_ERR(lt9611uxc->enable_gpio)) { 580 dev_err(dev, "failed to acquire enable gpio\n"); 581 return PTR_ERR(lt9611uxc->enable_gpio); 582 } 583 584 return 0; 585 } 586 587 static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc) 588 { 589 unsigned int rev0, rev1, rev2; 590 int ret; 591 592 lt9611uxc_lock(lt9611uxc); 593 594 ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0); 595 ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1); 596 ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2); 597 if (ret) 598 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 599 else 600 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2); 601 602 lt9611uxc_unlock(lt9611uxc); 603 604 return ret; 605 } 606 607 static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc) 608 { 609 unsigned int rev; 610 int ret; 611 612 lt9611uxc_lock(lt9611uxc); 613 614 ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev); 615 if (ret) 616 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 617 else 618 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev); 619 620 lt9611uxc_unlock(lt9611uxc); 621 622 return ret < 0 ? ret : rev; 623 } 624 625 static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data, 626 struct hdmi_codec_daifmt *fmt, 627 struct hdmi_codec_params *hparms) 628 { 629 /* 630 * LT9611UXC will automatically detect rate and sample size, so no need 631 * to setup anything here. 632 */ 633 return 0; 634 } 635 636 static void lt9611uxc_audio_shutdown(struct device *dev, void *data) 637 { 638 } 639 640 static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 641 struct device_node *endpoint) 642 { 643 struct of_endpoint of_ep; 644 int ret; 645 646 ret = of_graph_parse_endpoint(endpoint, &of_ep); 647 if (ret < 0) 648 return ret; 649 650 /* 651 * HDMI sound should be located as reg = <2> 652 * Then, it is sound port 0 653 */ 654 if (of_ep.port == 2) 655 return 0; 656 657 return -EINVAL; 658 } 659 660 static const struct hdmi_codec_ops lt9611uxc_codec_ops = { 661 .hw_params = lt9611uxc_hdmi_hw_params, 662 .audio_shutdown = lt9611uxc_audio_shutdown, 663 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id, 664 }; 665 666 static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc) 667 { 668 struct hdmi_codec_pdata codec_data = { 669 .ops = <9611uxc_codec_ops, 670 .max_i2s_channels = 2, 671 .i2s = 1, 672 .data = lt9611uxc, 673 }; 674 675 lt9611uxc->audio_pdev = 676 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 677 PLATFORM_DEVID_AUTO, 678 &codec_data, sizeof(codec_data)); 679 680 return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev); 681 } 682 683 static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc) 684 { 685 if (lt9611uxc->audio_pdev) { 686 platform_device_unregister(lt9611uxc->audio_pdev); 687 lt9611uxc->audio_pdev = NULL; 688 } 689 } 690 691 #define LT9611UXC_FW_PAGE_SIZE 32 692 static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf) 693 { 694 struct reg_sequence seq_write_prepare[] = { 695 REG_SEQ0(0x805a, 0x04), 696 REG_SEQ0(0x805a, 0x00), 697 698 REG_SEQ0(0x805e, 0xdf), 699 REG_SEQ0(0x805a, 0x20), 700 REG_SEQ0(0x805a, 0x00), 701 REG_SEQ0(0x8058, 0x21), 702 }; 703 704 struct reg_sequence seq_write_addr[] = { 705 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 706 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 707 REG_SEQ0(0x805d, addr & 0xff), 708 REG_SEQ0(0x805a, 0x10), 709 REG_SEQ0(0x805a, 0x00), 710 }; 711 712 regmap_write(lt9611uxc->regmap, 0x8108, 0xbf); 713 msleep(20); 714 regmap_write(lt9611uxc->regmap, 0x8108, 0xff); 715 msleep(20); 716 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare)); 717 regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE); 718 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr)); 719 msleep(20); 720 } 721 722 static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf) 723 { 724 struct reg_sequence seq_read_page[] = { 725 REG_SEQ0(0x805a, 0xa0), 726 REG_SEQ0(0x805a, 0x80), 727 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 728 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 729 REG_SEQ0(0x805d, addr & 0xff), 730 REG_SEQ0(0x805a, 0x90), 731 REG_SEQ0(0x805a, 0x80), 732 REG_SEQ0(0x8058, 0x21), 733 }; 734 735 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page)); 736 regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE); 737 } 738 739 static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size) 740 { 741 struct reg_sequence seq_read_setup[] = { 742 REG_SEQ0(0x805a, 0x84), 743 REG_SEQ0(0x805a, 0x80), 744 }; 745 746 char *readbuf; 747 u16 offset; 748 749 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL); 750 if (!readbuf) 751 return NULL; 752 753 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup)); 754 755 for (offset = 0; 756 offset < size; 757 offset += LT9611UXC_FW_PAGE_SIZE) 758 lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]); 759 760 return readbuf; 761 } 762 763 static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc) 764 { 765 int ret; 766 u16 offset; 767 size_t remain; 768 char *readbuf; 769 const struct firmware *fw; 770 771 struct reg_sequence seq_setup[] = { 772 REG_SEQ0(0x805e, 0xdf), 773 REG_SEQ0(0x8058, 0x00), 774 REG_SEQ0(0x8059, 0x50), 775 REG_SEQ0(0x805a, 0x10), 776 REG_SEQ0(0x805a, 0x00), 777 }; 778 779 780 struct reg_sequence seq_block_erase[] = { 781 REG_SEQ0(0x805a, 0x04), 782 REG_SEQ0(0x805a, 0x00), 783 REG_SEQ0(0x805b, 0x00), 784 REG_SEQ0(0x805c, 0x00), 785 REG_SEQ0(0x805d, 0x00), 786 REG_SEQ0(0x805a, 0x01), 787 REG_SEQ0(0x805a, 0x00), 788 }; 789 790 ret = request_firmware(&fw, "lt9611uxc_fw.bin", lt9611uxc->dev); 791 if (ret < 0) 792 return ret; 793 794 dev_info(lt9611uxc->dev, "Updating firmware\n"); 795 lt9611uxc_lock(lt9611uxc); 796 797 regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup)); 798 799 /* 800 * Need erase block 2 timess here. Sometimes, block erase can fail. 801 * This is a workaroud. 802 */ 803 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 804 msleep(3000); 805 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 806 msleep(3000); 807 808 for (offset = 0, remain = fw->size; 809 remain >= LT9611UXC_FW_PAGE_SIZE; 810 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE) 811 lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset); 812 813 if (remain > 0) { 814 char buf[LT9611UXC_FW_PAGE_SIZE]; 815 816 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE); 817 memcpy(buf, fw->data + offset, remain); 818 lt9611uxc_firmware_write_page(lt9611uxc, offset, buf); 819 } 820 msleep(20); 821 822 readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size); 823 if (!readbuf) { 824 ret = -ENOMEM; 825 goto out; 826 } 827 828 if (!memcmp(readbuf, fw->data, fw->size)) { 829 dev_err(lt9611uxc->dev, "Firmware update failed\n"); 830 print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false); 831 ret = -EINVAL; 832 } else { 833 dev_info(lt9611uxc->dev, "Firmware updates successfully\n"); 834 ret = 0; 835 } 836 kfree(readbuf); 837 838 out: 839 lt9611uxc_unlock(lt9611uxc); 840 lt9611uxc_reset(lt9611uxc); 841 release_firmware(fw); 842 843 return ret; 844 } 845 846 static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) 847 { 848 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 849 int ret; 850 851 ret = lt9611uxc_firmware_update(lt9611uxc); 852 if (ret < 0) 853 return ret; 854 return len; 855 } 856 857 static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf) 858 { 859 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 860 861 return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version); 862 } 863 864 static DEVICE_ATTR_RW(lt9611uxc_firmware); 865 866 static struct attribute *lt9611uxc_attrs[] = { 867 &dev_attr_lt9611uxc_firmware.attr, 868 NULL, 869 }; 870 871 static const struct attribute_group lt9611uxc_attr_group = { 872 .attrs = lt9611uxc_attrs, 873 }; 874 875 static const struct attribute_group *lt9611uxc_attr_groups[] = { 876 <9611uxc_attr_group, 877 NULL, 878 }; 879 880 static int lt9611uxc_probe(struct i2c_client *client, 881 const struct i2c_device_id *id) 882 { 883 struct lt9611uxc *lt9611uxc; 884 struct device *dev = &client->dev; 885 int ret; 886 bool fw_updated = false; 887 888 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 889 dev_err(dev, "device doesn't support I2C\n"); 890 return -ENODEV; 891 } 892 893 lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL); 894 if (!lt9611uxc) 895 return -ENOMEM; 896 897 lt9611uxc->dev = &client->dev; 898 lt9611uxc->client = client; 899 mutex_init(<9611uxc->ocm_lock); 900 901 lt9611uxc->regmap = devm_regmap_init_i2c(client, <9611uxc_regmap_config); 902 if (IS_ERR(lt9611uxc->regmap)) { 903 dev_err(lt9611uxc->dev, "regmap i2c init failed\n"); 904 return PTR_ERR(lt9611uxc->regmap); 905 } 906 907 ret = lt9611uxc_parse_dt(&client->dev, lt9611uxc); 908 if (ret) { 909 dev_err(dev, "failed to parse device tree\n"); 910 return ret; 911 } 912 913 ret = lt9611uxc_gpio_init(lt9611uxc); 914 if (ret < 0) 915 goto err_of_put; 916 917 ret = lt9611uxc_regulator_init(lt9611uxc); 918 if (ret < 0) 919 goto err_of_put; 920 921 lt9611uxc_assert_5v(lt9611uxc); 922 923 ret = lt9611uxc_regulator_enable(lt9611uxc); 924 if (ret) 925 goto err_of_put; 926 927 lt9611uxc_reset(lt9611uxc); 928 929 ret = lt9611uxc_read_device_rev(lt9611uxc); 930 if (ret) { 931 dev_err(dev, "failed to read chip rev\n"); 932 goto err_disable_regulators; 933 } 934 935 retry: 936 ret = lt9611uxc_read_version(lt9611uxc); 937 if (ret < 0) { 938 dev_err(dev, "failed to read FW version\n"); 939 goto err_disable_regulators; 940 } else if (ret == 0) { 941 if (!fw_updated) { 942 fw_updated = true; 943 dev_err(dev, "FW version 0, enforcing firmware update\n"); 944 ret = lt9611uxc_firmware_update(lt9611uxc); 945 if (ret < 0) 946 goto err_disable_regulators; 947 else 948 goto retry; 949 } else { 950 dev_err(dev, "FW version 0, update failed\n"); 951 ret = -EOPNOTSUPP; 952 goto err_disable_regulators; 953 } 954 } else if (ret < 0x40) { 955 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret); 956 } else { 957 lt9611uxc->hpd_supported = true; 958 } 959 lt9611uxc->fw_version = ret; 960 961 init_waitqueue_head(<9611uxc->wq); 962 INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work); 963 964 ret = devm_request_threaded_irq(dev, client->irq, NULL, 965 lt9611uxc_irq_thread_handler, 966 IRQF_ONESHOT, "lt9611uxc", lt9611uxc); 967 if (ret) { 968 dev_err(dev, "failed to request irq\n"); 969 goto err_disable_regulators; 970 } 971 972 i2c_set_clientdata(client, lt9611uxc); 973 974 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs; 975 lt9611uxc->bridge.of_node = client->dev.of_node; 976 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 977 if (lt9611uxc->hpd_supported) 978 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD; 979 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 980 981 drm_bridge_add(<9611uxc->bridge); 982 983 return lt9611uxc_audio_init(dev, lt9611uxc); 984 985 err_disable_regulators: 986 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 987 988 err_of_put: 989 of_node_put(lt9611uxc->dsi1_node); 990 of_node_put(lt9611uxc->dsi0_node); 991 992 return ret; 993 } 994 995 static int lt9611uxc_remove(struct i2c_client *client) 996 { 997 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client); 998 999 disable_irq(client->irq); 1000 flush_scheduled_work(); 1001 lt9611uxc_audio_exit(lt9611uxc); 1002 drm_bridge_remove(<9611uxc->bridge); 1003 1004 mutex_destroy(<9611uxc->ocm_lock); 1005 1006 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 1007 1008 of_node_put(lt9611uxc->dsi1_node); 1009 of_node_put(lt9611uxc->dsi0_node); 1010 1011 return 0; 1012 } 1013 1014 static struct i2c_device_id lt9611uxc_id[] = { 1015 { "lontium,lt9611uxc", 0 }, 1016 { /* sentinel */ } 1017 }; 1018 1019 static const struct of_device_id lt9611uxc_match_table[] = { 1020 { .compatible = "lontium,lt9611uxc" }, 1021 { /* sentinel */ } 1022 }; 1023 MODULE_DEVICE_TABLE(of, lt9611uxc_match_table); 1024 1025 static struct i2c_driver lt9611uxc_driver = { 1026 .driver = { 1027 .name = "lt9611uxc", 1028 .of_match_table = lt9611uxc_match_table, 1029 .dev_groups = lt9611uxc_attr_groups, 1030 }, 1031 .probe = lt9611uxc_probe, 1032 .remove = lt9611uxc_remove, 1033 .id_table = lt9611uxc_id, 1034 }; 1035 module_i2c_driver(lt9611uxc_driver); 1036 1037 MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>"); 1038 MODULE_LICENSE("GPL v2"); 1039