1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/device.h> 7 #include <linux/delay.h> 8 #include <linux/i2c.h> 9 #include <linux/gpio.h> 10 #include <linux/of_gpio.h> 11 #include <linux/regmap.h> 12 13 #include <drm/drm_probe_helper.h> 14 #include <drm/drm_atomic_helper.h> 15 #include <drm/drm_mipi_dsi.h> 16 #include <drm/drm_of.h> 17 18 #include <video/videomode.h> 19 20 #define I2C_MAIN 0 21 #define I2C_ADDR_MAIN 0x48 22 23 #define I2C_CEC_DSI 1 24 #define I2C_ADDR_CEC_DSI 0x49 25 26 #define I2C_MAX_IDX 2 27 28 struct lt8912 { 29 struct device *dev; 30 struct drm_bridge bridge; 31 struct drm_connector connector; 32 33 struct i2c_client *i2c_client[I2C_MAX_IDX]; 34 struct regmap *regmap[I2C_MAX_IDX]; 35 36 struct device_node *host_node; 37 struct drm_bridge *hdmi_port; 38 39 struct mipi_dsi_device *dsi; 40 41 struct gpio_desc *gp_reset; 42 43 struct videomode mode; 44 45 u8 data_lanes; 46 bool is_power_on; 47 bool is_attached; 48 }; 49 50 static int lt8912_write_init_config(struct lt8912 *lt) 51 { 52 const struct reg_sequence seq[] = { 53 /* Digital clock en*/ 54 {0x08, 0xff}, 55 {0x09, 0xff}, 56 {0x0a, 0xff}, 57 {0x0b, 0x7c}, 58 {0x0c, 0xff}, 59 {0x42, 0x04}, 60 61 /*Tx Analog*/ 62 {0x31, 0xb1}, 63 {0x32, 0xb1}, 64 {0x33, 0x0e}, 65 {0x37, 0x00}, 66 {0x38, 0x22}, 67 {0x60, 0x82}, 68 69 /*Cbus Analog*/ 70 {0x39, 0x45}, 71 {0x3a, 0x00}, 72 {0x3b, 0x00}, 73 74 /*HDMI Pll Analog*/ 75 {0x44, 0x31}, 76 {0x55, 0x44}, 77 {0x57, 0x01}, 78 {0x5a, 0x02}, 79 80 /*MIPI Analog*/ 81 {0x3e, 0xd6}, 82 {0x3f, 0xd4}, 83 {0x41, 0x3c}, 84 {0xB2, 0x00}, 85 }; 86 87 return regmap_multi_reg_write(lt->regmap[I2C_MAIN], seq, ARRAY_SIZE(seq)); 88 } 89 90 static int lt8912_write_mipi_basic_config(struct lt8912 *lt) 91 { 92 const struct reg_sequence seq[] = { 93 {0x12, 0x04}, 94 {0x14, 0x00}, 95 {0x15, 0x00}, 96 {0x1a, 0x03}, 97 {0x1b, 0x03}, 98 }; 99 100 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 101 }; 102 103 static int lt8912_write_dds_config(struct lt8912 *lt) 104 { 105 const struct reg_sequence seq[] = { 106 {0x4e, 0xff}, 107 {0x4f, 0x56}, 108 {0x50, 0x69}, 109 {0x51, 0x80}, 110 {0x1f, 0x5e}, 111 {0x20, 0x01}, 112 {0x21, 0x2c}, 113 {0x22, 0x01}, 114 {0x23, 0xfa}, 115 {0x24, 0x00}, 116 {0x25, 0xc8}, 117 {0x26, 0x00}, 118 {0x27, 0x5e}, 119 {0x28, 0x01}, 120 {0x29, 0x2c}, 121 {0x2a, 0x01}, 122 {0x2b, 0xfa}, 123 {0x2c, 0x00}, 124 {0x2d, 0xc8}, 125 {0x2e, 0x00}, 126 {0x42, 0x64}, 127 {0x43, 0x00}, 128 {0x44, 0x04}, 129 {0x45, 0x00}, 130 {0x46, 0x59}, 131 {0x47, 0x00}, 132 {0x48, 0xf2}, 133 {0x49, 0x06}, 134 {0x4a, 0x00}, 135 {0x4b, 0x72}, 136 {0x4c, 0x45}, 137 {0x4d, 0x00}, 138 {0x52, 0x08}, 139 {0x53, 0x00}, 140 {0x54, 0xb2}, 141 {0x55, 0x00}, 142 {0x56, 0xe4}, 143 {0x57, 0x0d}, 144 {0x58, 0x00}, 145 {0x59, 0xe4}, 146 {0x5a, 0x8a}, 147 {0x5b, 0x00}, 148 {0x5c, 0x34}, 149 {0x1e, 0x4f}, 150 {0x51, 0x00}, 151 }; 152 153 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 154 } 155 156 static int lt8912_write_rxlogicres_config(struct lt8912 *lt) 157 { 158 int ret; 159 160 ret = regmap_write(lt->regmap[I2C_MAIN], 0x03, 0x7f); 161 usleep_range(10000, 20000); 162 ret |= regmap_write(lt->regmap[I2C_MAIN], 0x03, 0xff); 163 164 return ret; 165 }; 166 167 static int lt8912_write_lvds_config(struct lt8912 *lt) 168 { 169 const struct reg_sequence seq[] = { 170 {0x44, 0x30}, 171 {0x51, 0x05}, 172 {0x50, 0x24}, 173 {0x51, 0x2d}, 174 {0x52, 0x04}, 175 {0x69, 0x0e}, 176 {0x69, 0x8e}, 177 {0x6a, 0x00}, 178 {0x6c, 0xb8}, 179 {0x6b, 0x51}, 180 {0x04, 0xfb}, 181 {0x04, 0xff}, 182 {0x7f, 0x00}, 183 {0xa8, 0x13}, 184 {0x02, 0xf7}, 185 {0x02, 0xff}, 186 {0x03, 0xcf}, 187 {0x03, 0xff}, 188 }; 189 190 return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq)); 191 }; 192 193 static inline struct lt8912 *bridge_to_lt8912(struct drm_bridge *b) 194 { 195 return container_of(b, struct lt8912, bridge); 196 } 197 198 static inline struct lt8912 *connector_to_lt8912(struct drm_connector *c) 199 { 200 return container_of(c, struct lt8912, connector); 201 } 202 203 static const struct regmap_config lt8912_regmap_config = { 204 .reg_bits = 8, 205 .val_bits = 8, 206 .max_register = 0xff, 207 }; 208 209 static int lt8912_init_i2c(struct lt8912 *lt, struct i2c_client *client) 210 { 211 unsigned int i; 212 /* 213 * At this time we only initialize 2 chips, but the lt8912 provides 214 * a third interface for the audio over HDMI configuration. 215 */ 216 struct i2c_board_info info[] = { 217 { I2C_BOARD_INFO("lt8912p0", I2C_ADDR_MAIN), }, 218 { I2C_BOARD_INFO("lt8912p1", I2C_ADDR_CEC_DSI), }, 219 }; 220 221 if (!lt) 222 return -ENODEV; 223 224 for (i = 0; i < ARRAY_SIZE(info); i++) { 225 if (i > 0) { 226 lt->i2c_client[i] = i2c_new_dummy_device(client->adapter, 227 info[i].addr); 228 if (IS_ERR(lt->i2c_client[i])) 229 return PTR_ERR(lt->i2c_client[i]); 230 } 231 232 lt->regmap[i] = devm_regmap_init_i2c(lt->i2c_client[i], 233 <8912_regmap_config); 234 if (IS_ERR(lt->regmap[i])) 235 return PTR_ERR(lt->regmap[i]); 236 } 237 return 0; 238 } 239 240 static int lt8912_free_i2c(struct lt8912 *lt) 241 { 242 unsigned int i; 243 244 for (i = 1; i < I2C_MAX_IDX; i++) 245 i2c_unregister_device(lt->i2c_client[i]); 246 247 return 0; 248 } 249 250 static int lt8912_hard_power_on(struct lt8912 *lt) 251 { 252 gpiod_set_value_cansleep(lt->gp_reset, 0); 253 msleep(20); 254 255 return 0; 256 } 257 258 static void lt8912_hard_power_off(struct lt8912 *lt) 259 { 260 gpiod_set_value_cansleep(lt->gp_reset, 1); 261 msleep(20); 262 lt->is_power_on = false; 263 } 264 265 static int lt8912_video_setup(struct lt8912 *lt) 266 { 267 u32 hactive, h_total, hpw, hfp, hbp; 268 u32 vactive, v_total, vpw, vfp, vbp; 269 u8 settle = 0x08; 270 int ret; 271 272 if (!lt) 273 return -EINVAL; 274 275 hactive = lt->mode.hactive; 276 hfp = lt->mode.hfront_porch; 277 hpw = lt->mode.hsync_len; 278 hbp = lt->mode.hback_porch; 279 h_total = hactive + hfp + hpw + hbp; 280 281 vactive = lt->mode.vactive; 282 vfp = lt->mode.vfront_porch; 283 vpw = lt->mode.vsync_len; 284 vbp = lt->mode.vback_porch; 285 v_total = vactive + vfp + vpw + vbp; 286 287 if (vactive <= 600) 288 settle = 0x04; 289 else if (vactive == 1080) 290 settle = 0x0a; 291 292 ret = regmap_write(lt->regmap[I2C_CEC_DSI], 0x10, 0x01); 293 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x11, settle); 294 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x18, hpw); 295 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x19, vpw); 296 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1c, hactive & 0xff); 297 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1d, hactive >> 8); 298 299 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x2f, 0x0c); 300 301 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x34, h_total & 0xff); 302 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x35, h_total >> 8); 303 304 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x36, v_total & 0xff); 305 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x37, v_total >> 8); 306 307 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x38, vbp & 0xff); 308 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x39, vbp >> 8); 309 310 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3a, vfp & 0xff); 311 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3b, vfp >> 8); 312 313 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3c, hbp & 0xff); 314 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3d, hbp >> 8); 315 316 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3e, hfp & 0xff); 317 ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3f, hfp >> 8); 318 319 return ret; 320 } 321 322 static int lt8912_soft_power_on(struct lt8912 *lt) 323 { 324 if (!lt->is_power_on) { 325 u32 lanes = lt->data_lanes; 326 327 lt8912_write_init_config(lt); 328 regmap_write(lt->regmap[I2C_CEC_DSI], 0x13, lanes & 3); 329 330 lt8912_write_mipi_basic_config(lt); 331 332 lt->is_power_on = true; 333 } 334 335 return 0; 336 } 337 338 static int lt8912_video_on(struct lt8912 *lt) 339 { 340 int ret; 341 342 ret = lt8912_video_setup(lt); 343 if (ret < 0) 344 goto end; 345 346 ret = lt8912_write_dds_config(lt); 347 if (ret < 0) 348 goto end; 349 350 ret = lt8912_write_rxlogicres_config(lt); 351 if (ret < 0) 352 goto end; 353 354 ret = lt8912_write_lvds_config(lt); 355 if (ret < 0) 356 goto end; 357 358 end: 359 return ret; 360 } 361 362 static enum drm_connector_status lt8912_check_cable_status(struct lt8912 *lt) 363 { 364 int ret; 365 unsigned int reg_val; 366 367 ret = regmap_read(lt->regmap[I2C_MAIN], 0xC1, ®_val); 368 if (ret) 369 return connector_status_unknown; 370 371 if (reg_val & BIT(7)) 372 return connector_status_connected; 373 374 return connector_status_disconnected; 375 } 376 377 static enum drm_connector_status 378 lt8912_connector_detect(struct drm_connector *connector, bool force) 379 { 380 struct lt8912 *lt = connector_to_lt8912(connector); 381 382 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT) 383 return drm_bridge_detect(lt->hdmi_port); 384 385 return lt8912_check_cable_status(lt); 386 } 387 388 static const struct drm_connector_funcs lt8912_connector_funcs = { 389 .detect = lt8912_connector_detect, 390 .fill_modes = drm_helper_probe_single_connector_modes, 391 .destroy = drm_connector_cleanup, 392 .reset = drm_atomic_helper_connector_reset, 393 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 394 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 395 }; 396 397 static enum drm_mode_status 398 lt8912_connector_mode_valid(struct drm_connector *connector, 399 struct drm_display_mode *mode) 400 { 401 if (mode->clock > 150000) 402 return MODE_CLOCK_HIGH; 403 404 if (mode->hdisplay > 1920) 405 return MODE_BAD_HVALUE; 406 407 if (mode->vdisplay > 1080) 408 return MODE_BAD_VVALUE; 409 410 return MODE_OK; 411 } 412 413 static int lt8912_connector_get_modes(struct drm_connector *connector) 414 { 415 struct edid *edid; 416 int ret = -1; 417 int num = 0; 418 struct lt8912 *lt = connector_to_lt8912(connector); 419 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 420 421 edid = drm_bridge_get_edid(lt->hdmi_port, connector); 422 if (edid) { 423 drm_connector_update_edid_property(connector, edid); 424 num = drm_add_edid_modes(connector, edid); 425 } else { 426 return ret; 427 } 428 429 ret = drm_display_info_set_bus_formats(&connector->display_info, 430 &bus_format, 1); 431 if (ret) 432 num = ret; 433 434 kfree(edid); 435 return num; 436 } 437 438 static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = { 439 .get_modes = lt8912_connector_get_modes, 440 .mode_valid = lt8912_connector_mode_valid, 441 }; 442 443 static void lt8912_bridge_mode_set(struct drm_bridge *bridge, 444 const struct drm_display_mode *mode, 445 const struct drm_display_mode *adj) 446 { 447 struct lt8912 *lt = bridge_to_lt8912(bridge); 448 449 drm_display_mode_to_videomode(adj, <->mode); 450 } 451 452 static void lt8912_bridge_enable(struct drm_bridge *bridge) 453 { 454 struct lt8912 *lt = bridge_to_lt8912(bridge); 455 456 lt8912_video_on(lt); 457 } 458 459 static int lt8912_attach_dsi(struct lt8912 *lt) 460 { 461 struct device *dev = lt->dev; 462 struct mipi_dsi_host *host; 463 struct mipi_dsi_device *dsi; 464 int ret = -1; 465 const struct mipi_dsi_device_info info = { .type = "lt8912", 466 .channel = 0, 467 .node = NULL, 468 }; 469 470 host = of_find_mipi_dsi_host_by_node(lt->host_node); 471 if (!host) { 472 dev_err(dev, "failed to find dsi host\n"); 473 return -EPROBE_DEFER; 474 } 475 476 dsi = mipi_dsi_device_register_full(host, &info); 477 if (IS_ERR(dsi)) { 478 ret = PTR_ERR(dsi); 479 dev_err(dev, "failed to create dsi device (%d)\n", ret); 480 goto err_dsi_device; 481 } 482 483 lt->dsi = dsi; 484 485 dsi->lanes = lt->data_lanes; 486 dsi->format = MIPI_DSI_FMT_RGB888; 487 488 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | 489 MIPI_DSI_MODE_VIDEO_BURST | 490 MIPI_DSI_MODE_LPM | 491 MIPI_DSI_MODE_EOT_PACKET; 492 493 ret = mipi_dsi_attach(dsi); 494 if (ret < 0) { 495 dev_err(dev, "failed to attach dsi to host\n"); 496 goto err_dsi_attach; 497 } 498 499 return 0; 500 501 err_dsi_attach: 502 mipi_dsi_device_unregister(dsi); 503 err_dsi_device: 504 return ret; 505 } 506 507 static void lt8912_detach_dsi(struct lt8912 *lt) 508 { 509 mipi_dsi_detach(lt->dsi); 510 mipi_dsi_device_unregister(lt->dsi); 511 } 512 513 static int lt8912_bridge_connector_init(struct drm_bridge *bridge) 514 { 515 int ret; 516 struct lt8912 *lt = bridge_to_lt8912(bridge); 517 struct drm_connector *connector = <->connector; 518 519 connector->polled = DRM_CONNECTOR_POLL_CONNECT | 520 DRM_CONNECTOR_POLL_DISCONNECT; 521 522 ret = drm_connector_init(bridge->dev, connector, 523 <8912_connector_funcs, 524 lt->hdmi_port->type); 525 if (ret) 526 goto exit; 527 528 drm_connector_helper_add(connector, <8912_connector_helper_funcs); 529 530 connector->dpms = DRM_MODE_DPMS_OFF; 531 drm_connector_attach_encoder(connector, bridge->encoder); 532 533 exit: 534 return ret; 535 } 536 537 static int lt8912_bridge_attach(struct drm_bridge *bridge, 538 enum drm_bridge_attach_flags flags) 539 { 540 struct lt8912 *lt = bridge_to_lt8912(bridge); 541 int ret; 542 543 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 544 ret = lt8912_bridge_connector_init(bridge); 545 if (ret) { 546 dev_err(lt->dev, "Failed to init bridge ! (%d)\n", ret); 547 return ret; 548 } 549 } 550 551 ret = lt8912_hard_power_on(lt); 552 if (ret) 553 return ret; 554 555 ret = lt8912_soft_power_on(lt); 556 if (ret) 557 goto error; 558 559 ret = lt8912_attach_dsi(lt); 560 if (ret) 561 goto error; 562 563 lt->is_attached = true; 564 565 return 0; 566 567 error: 568 lt8912_hard_power_off(lt); 569 return ret; 570 } 571 572 static void lt8912_bridge_detach(struct drm_bridge *bridge) 573 { 574 struct lt8912 *lt = bridge_to_lt8912(bridge); 575 576 if (lt->is_attached) { 577 lt8912_detach_dsi(lt); 578 lt8912_hard_power_off(lt); 579 drm_connector_unregister(<->connector); 580 drm_connector_cleanup(<->connector); 581 } 582 } 583 584 static enum drm_connector_status 585 lt8912_bridge_detect(struct drm_bridge *bridge) 586 { 587 struct lt8912 *lt = bridge_to_lt8912(bridge); 588 589 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT) 590 return drm_bridge_detect(lt->hdmi_port); 591 592 return lt8912_check_cable_status(lt); 593 } 594 595 static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge, 596 struct drm_connector *connector) 597 { 598 struct lt8912 *lt = bridge_to_lt8912(bridge); 599 600 /* 601 * edid must be read through the ddc bus but it must be 602 * given to the hdmi connector node. 603 */ 604 if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID) 605 return drm_bridge_get_edid(lt->hdmi_port, connector); 606 607 dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n"); 608 return NULL; 609 } 610 611 static const struct drm_bridge_funcs lt8912_bridge_funcs = { 612 .attach = lt8912_bridge_attach, 613 .detach = lt8912_bridge_detach, 614 .mode_set = lt8912_bridge_mode_set, 615 .enable = lt8912_bridge_enable, 616 .detect = lt8912_bridge_detect, 617 .get_edid = lt8912_bridge_get_edid, 618 }; 619 620 static int lt8912_parse_dt(struct lt8912 *lt) 621 { 622 struct gpio_desc *gp_reset; 623 struct device *dev = lt->dev; 624 int ret = 0; 625 struct device_node *port_node; 626 struct device_node *endpoint; 627 628 gp_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 629 if (IS_ERR(gp_reset)) { 630 ret = PTR_ERR(gp_reset); 631 if (ret != -EPROBE_DEFER) 632 dev_err(dev, "Failed to get reset gpio: %d\n", ret); 633 return ret; 634 } 635 lt->gp_reset = gp_reset; 636 637 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); 638 if (IS_ERR(endpoint)) { 639 ret = PTR_ERR(endpoint); 640 goto end; 641 } 642 643 lt->data_lanes = of_property_count_u32_elems(endpoint, "data-lanes"); 644 of_node_put(endpoint); 645 646 lt->host_node = of_graph_get_remote_node(dev->of_node, 0, -1); 647 if (!lt->host_node) { 648 dev_err(lt->dev, "%s: Failed to get remote port\n", __func__); 649 ret = -ENODEV; 650 goto end; 651 } 652 653 port_node = of_graph_get_remote_node(dev->of_node, 1, -1); 654 if (!port_node) { 655 dev_err(lt->dev, "%s: Failed to get connector port\n", __func__); 656 ret = -ENODEV; 657 goto err_free_host_node; 658 } 659 660 lt->hdmi_port = of_drm_find_bridge(port_node); 661 if (IS_ERR(lt->hdmi_port)) { 662 dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__); 663 ret = PTR_ERR(lt->hdmi_port); 664 of_node_put(lt->host_node); 665 goto end; 666 } 667 668 if (!of_device_is_compatible(port_node, "hdmi-connector")) { 669 dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__); 670 ret = -EINVAL; 671 } 672 673 of_node_put(port_node); 674 675 end: 676 return ret; 677 678 err_free_host_node: 679 of_node_put(lt->host_node); 680 return ret; 681 } 682 683 static int lt8912_put_dt(struct lt8912 *lt) 684 { 685 of_node_put(lt->host_node); 686 return 0; 687 } 688 689 static int lt8912_probe(struct i2c_client *client, 690 const struct i2c_device_id *id) 691 { 692 static struct lt8912 *lt; 693 int ret = 0; 694 struct device *dev = &client->dev; 695 696 lt = devm_kzalloc(dev, sizeof(struct lt8912), GFP_KERNEL); 697 if (!lt) 698 return -ENOMEM; 699 700 lt->dev = dev; 701 lt->i2c_client[0] = client; 702 703 ret = lt8912_parse_dt(lt); 704 if (ret) 705 goto err_dt_parse; 706 707 ret = lt8912_init_i2c(lt, client); 708 if (ret) 709 goto err_i2c; 710 711 i2c_set_clientdata(client, lt); 712 713 lt->bridge.funcs = <8912_bridge_funcs; 714 lt->bridge.of_node = dev->of_node; 715 lt->bridge.ops = (DRM_BRIDGE_OP_EDID | 716 DRM_BRIDGE_OP_DETECT); 717 718 drm_bridge_add(<->bridge); 719 720 return 0; 721 722 err_i2c: 723 lt8912_put_dt(lt); 724 err_dt_parse: 725 return ret; 726 } 727 728 static int lt8912_remove(struct i2c_client *client) 729 { 730 struct lt8912 *lt = i2c_get_clientdata(client); 731 732 lt8912_bridge_detach(<->bridge); 733 drm_bridge_remove(<->bridge); 734 lt8912_free_i2c(lt); 735 lt8912_put_dt(lt); 736 return 0; 737 } 738 739 static const struct of_device_id lt8912_dt_match[] = { 740 {.compatible = "lontium,lt8912b"}, 741 {} 742 }; 743 MODULE_DEVICE_TABLE(of, lt8912_dt_match); 744 745 static const struct i2c_device_id lt8912_id[] = { 746 {"lt8912", 0}, 747 {}, 748 }; 749 MODULE_DEVICE_TABLE(i2c, lt8912_id); 750 751 static struct i2c_driver lt8912_i2c_driver = { 752 .driver = { 753 .name = "lt8912", 754 .of_match_table = lt8912_dt_match, 755 .owner = THIS_MODULE, 756 }, 757 .probe = lt8912_probe, 758 .remove = lt8912_remove, 759 .id_table = lt8912_id, 760 }; 761 module_i2c_driver(lt8912_i2c_driver); 762 763 MODULE_AUTHOR("Adrien Grassein <adrien.grassein@gmail.com>"); 764 MODULE_DESCRIPTION("lt8912 drm driver"); 765 MODULE_LICENSE("GPL v2"); 766