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