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/gpio/consumer.h> 8#include <linux/interrupt.h> 9#include <linux/module.h> 10#include <linux/of_graph.h> 11#include <linux/platform_device.h> 12#include <linux/regmap.h> 13#include <linux/regulator/consumer.h> 14 15#include <sound/hdmi-codec.h> 16 17#include <drm/drm_atomic_helper.h> 18#include <drm/drm_bridge.h> 19#include <drm/drm_mipi_dsi.h> 20#include <drm/drm_print.h> 21#include <drm/drm_probe_helper.h> 22 23#define EDID_SEG_SIZE 256 24#define EDID_LEN 32 25#define EDID_LOOP 8 26#define KEY_DDC_ACCS_DONE 0x02 27#define DDC_NO_ACK 0x50 28 29#define LT9611_4LANES 0 30 31struct lt9611 { 32 struct device *dev; 33 struct drm_bridge bridge; 34 struct drm_connector connector; 35 36 struct regmap *regmap; 37 38 struct device_node *dsi0_node; 39 struct device_node *dsi1_node; 40 struct mipi_dsi_device *dsi0; 41 struct mipi_dsi_device *dsi1; 42 struct platform_device *audio_pdev; 43 44 bool ac_mode; 45 46 struct gpio_desc *reset_gpio; 47 struct gpio_desc *enable_gpio; 48 49 bool power_on; 50 bool sleep; 51 52 struct regulator_bulk_data supplies[2]; 53 54 struct i2c_client *client; 55 56 enum drm_connector_status status; 57 58 u8 edid_buf[EDID_SEG_SIZE]; 59 u32 vic; 60}; 61 62#define LT9611_PAGE_CONTROL 0xff 63 64static const struct regmap_range_cfg lt9611_ranges[] = { 65 { 66 .name = "register_range", 67 .range_min = 0, 68 .range_max = 0x85ff, 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 77static const struct regmap_config lt9611_regmap_config = { 78 .reg_bits = 8, 79 .val_bits = 8, 80 .max_register = 0xffff, 81 .ranges = lt9611_ranges, 82 .num_ranges = ARRAY_SIZE(lt9611_ranges), 83}; 84 85struct lt9611_mode { 86 u16 hdisplay; 87 u16 vdisplay; 88 u8 vrefresh; 89 u8 lanes; 90 u8 intfs; 91}; 92 93static struct lt9611_mode lt9611_modes[] = { 94 { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */ 95 { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */ 96 { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */ 97 { 1920, 1080, 24, 3, 1 }, 98 { 720, 480, 60, 4, 1 }, 99 { 720, 576, 50, 2, 1 }, 100 { 640, 480, 60, 2, 1 }, 101}; 102 103static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) 104{ 105 return container_of(bridge, struct lt9611, bridge); 106} 107 108static struct lt9611 *connector_to_lt9611(struct drm_connector *connector) 109{ 110 return container_of(connector, struct lt9611, connector); 111} 112 113static int lt9611_mipi_input_analog(struct lt9611 *lt9611) 114{ 115 const struct reg_sequence reg_cfg[] = { 116 { 0x8106, 0x40 }, /* port A rx current */ 117 { 0x810a, 0xfe }, /* port A ldo voltage set */ 118 { 0x810b, 0xbf }, /* enable port A lprx */ 119 { 0x8111, 0x40 }, /* port B rx current */ 120 { 0x8115, 0xfe }, /* port B ldo voltage set */ 121 { 0x8116, 0xbf }, /* enable port B lprx */ 122 123 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */ 124 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */ 125 }; 126 127 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 128} 129 130static int lt9611_mipi_input_digital(struct lt9611 *lt9611, 131 const struct drm_display_mode *mode) 132{ 133 struct reg_sequence reg_cfg[] = { 134 { 0x8300, LT9611_4LANES }, 135 { 0x830a, 0x00 }, 136 { 0x824f, 0x80 }, 137 { 0x8250, 0x10 }, 138 { 0x8302, 0x0a }, 139 { 0x8306, 0x0a }, 140 }; 141 142 if (mode->hdisplay == 3840) 143 reg_cfg[1].def = 0x03; 144 145 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 146} 147 148static void lt9611_mipi_video_setup(struct lt9611 *lt9611, 149 const struct drm_display_mode *mode) 150{ 151 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch; 152 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch; 153 154 h_total = mode->htotal; 155 v_total = mode->vtotal; 156 157 hactive = mode->hdisplay; 158 hsync_len = mode->hsync_end - mode->hsync_start; 159 hfront_porch = mode->hsync_start - mode->hdisplay; 160 hsync_porch = hsync_len + mode->htotal - mode->hsync_end; 161 162 vactive = mode->vdisplay; 163 vsync_len = mode->vsync_end - mode->vsync_start; 164 vfront_porch = mode->vsync_start - mode->vdisplay; 165 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end; 166 167 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256)); 168 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256)); 169 170 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256)); 171 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256)); 172 173 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256)); 174 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256)); 175 176 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256)); 177 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256)); 178 179 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256)); 180 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256)); 181 182 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256)); 183 184 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256)); 185 186 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256)); 187 188 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) | 189 ((hfront_porch / 256) << 4)); 190 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256)); 191} 192 193static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int postdiv) 194{ 195 unsigned int pcr_m = mode->clock * 5 * postdiv / 27000; 196 const struct reg_sequence reg_cfg[] = { 197 { 0x830b, 0x01 }, 198 { 0x830c, 0x10 }, 199 { 0x8348, 0x00 }, 200 { 0x8349, 0x81 }, 201 202 /* stage 1 */ 203 { 0x8321, 0x4a }, 204 { 0x8324, 0x71 }, 205 { 0x8325, 0x30 }, 206 { 0x832a, 0x01 }, 207 208 /* stage 2 */ 209 { 0x834a, 0x40 }, 210 211 /* MK limit */ 212 { 0x832d, 0x38 }, 213 { 0x8331, 0x08 }, 214 }; 215 const struct reg_sequence reg_cfg2[] = { 216 { 0x830b, 0x03 }, 217 { 0x830c, 0xd0 }, 218 { 0x8348, 0x03 }, 219 { 0x8349, 0xe0 }, 220 { 0x8324, 0x72 }, 221 { 0x8325, 0x00 }, 222 { 0x832a, 0x01 }, 223 { 0x834a, 0x10 }, 224 }; 225 u8 pol = 0x10; 226 227 if (mode->flags & DRM_MODE_FLAG_NHSYNC) 228 pol |= 0x2; 229 if (mode->flags & DRM_MODE_FLAG_NVSYNC) 230 pol |= 0x1; 231 regmap_write(lt9611->regmap, 0x831d, pol); 232 233 if (mode->hdisplay == 3840) 234 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2)); 235 else 236 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 237 238 regmap_write(lt9611->regmap, 0x8326, pcr_m); 239 240 /* pcr rst */ 241 regmap_write(lt9611->regmap, 0x8011, 0x5a); 242 regmap_write(lt9611->regmap, 0x8011, 0xfa); 243} 244 245static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int *postdiv) 246{ 247 unsigned int pclk = mode->clock; 248 const struct reg_sequence reg_cfg[] = { 249 /* txpll init */ 250 { 0x8123, 0x40 }, 251 { 0x8124, 0x64 }, 252 { 0x8125, 0x80 }, 253 { 0x8126, 0x55 }, 254 { 0x812c, 0x37 }, 255 { 0x812f, 0x01 }, 256 { 0x8126, 0x55 }, 257 { 0x8127, 0x66 }, 258 { 0x8128, 0x88 }, 259 { 0x812a, 0x20 }, 260 }; 261 262 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 263 264 if (pclk > 150000) { 265 regmap_write(lt9611->regmap, 0x812d, 0x88); 266 *postdiv = 1; 267 } else if (pclk > 70000) { 268 regmap_write(lt9611->regmap, 0x812d, 0x99); 269 *postdiv = 2; 270 } else { 271 regmap_write(lt9611->regmap, 0x812d, 0xaa); 272 *postdiv = 4; 273 } 274 275 /* 276 * first divide pclk by 2 first 277 * - write divide by 64k to 19:16 bits which means shift by 17 278 * - write divide by 256 to 15:8 bits which means shift by 9 279 * - write remainder to 7:0 bits, which means shift by 1 280 */ 281 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ 282 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ 283 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ 284 285 regmap_write(lt9611->regmap, 0x82de, 0x20); 286 regmap_write(lt9611->regmap, 0x82de, 0xe0); 287 288 regmap_write(lt9611->regmap, 0x8016, 0xf1); 289 regmap_write(lt9611->regmap, 0x8016, 0xf3); 290 291 return 0; 292} 293 294static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg) 295{ 296 unsigned int temp, temp2; 297 int ret; 298 299 ret = regmap_read(lt9611->regmap, reg, &temp); 300 if (ret) 301 return ret; 302 temp <<= 8; 303 ret = regmap_read(lt9611->regmap, reg + 1, &temp2); 304 if (ret) 305 return ret; 306 307 return (temp + temp2); 308} 309 310static int lt9611_video_check(struct lt9611 *lt9611) 311{ 312 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk; 313 int temp; 314 315 /* top module video check */ 316 317 /* vactive */ 318 temp = lt9611_read_video_check(lt9611, 0x8282); 319 if (temp < 0) 320 goto end; 321 vactive = temp; 322 323 /* v_total */ 324 temp = lt9611_read_video_check(lt9611, 0x826c); 325 if (temp < 0) 326 goto end; 327 v_total = temp; 328 329 /* h_total_sysclk */ 330 temp = lt9611_read_video_check(lt9611, 0x8286); 331 if (temp < 0) 332 goto end; 333 h_total_sysclk = temp; 334 335 /* hactive_a */ 336 temp = lt9611_read_video_check(lt9611, 0x8382); 337 if (temp < 0) 338 goto end; 339 hactive_a = temp / 3; 340 341 /* hactive_b */ 342 temp = lt9611_read_video_check(lt9611, 0x8386); 343 if (temp < 0) 344 goto end; 345 hactive_b = temp / 3; 346 347 dev_info(lt9611->dev, 348 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n", 349 hactive_a, hactive_b, vactive, v_total, h_total_sysclk); 350 351 return 0; 352 353end: 354 dev_err(lt9611->dev, "read video check error\n"); 355 return temp; 356} 357 358static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611) 359{ 360 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic); 361 regmap_write(lt9611->regmap, 0x8447, lt9611->vic); 362 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */ 363 364 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 365 regmap_write(lt9611->regmap, 0x82d7, 0x04); 366} 367 368static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) 369{ 370 struct reg_sequence reg_cfg[] = { 371 { 0x8130, 0x6a }, 372 { 0x8131, 0x44 }, /* HDMI DC mode */ 373 { 0x8132, 0x4a }, 374 { 0x8133, 0x0b }, 375 { 0x8134, 0x00 }, 376 { 0x8135, 0x00 }, 377 { 0x8136, 0x00 }, 378 { 0x8137, 0x44 }, 379 { 0x813f, 0x0f }, 380 { 0x8140, 0xa0 }, 381 { 0x8141, 0xa0 }, 382 { 0x8142, 0xa0 }, 383 { 0x8143, 0xa0 }, 384 { 0x8144, 0x0a }, 385 }; 386 387 /* HDMI AC mode */ 388 if (lt9611->ac_mode) 389 reg_cfg[2].def = 0x73; 390 391 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 392} 393 394static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) 395{ 396 struct lt9611 *lt9611 = dev_id; 397 unsigned int irq_flag0 = 0; 398 unsigned int irq_flag3 = 0; 399 400 regmap_read(lt9611->regmap, 0x820f, &irq_flag3); 401 regmap_read(lt9611->regmap, 0x820c, &irq_flag0); 402 403 /* hpd changed low */ 404 if (irq_flag3 & 0x80) { 405 dev_info(lt9611->dev, "hdmi cable disconnected\n"); 406 407 regmap_write(lt9611->regmap, 0x8207, 0xbf); 408 regmap_write(lt9611->regmap, 0x8207, 0x3f); 409 } 410 411 /* hpd changed high */ 412 if (irq_flag3 & 0x40) { 413 dev_info(lt9611->dev, "hdmi cable connected\n"); 414 415 regmap_write(lt9611->regmap, 0x8207, 0x7f); 416 regmap_write(lt9611->regmap, 0x8207, 0x3f); 417 } 418 419 if (irq_flag3 & 0xc0 && lt9611->bridge.dev) 420 drm_kms_helper_hotplug_event(lt9611->bridge.dev); 421 422 /* video input changed */ 423 if (irq_flag0 & 0x01) { 424 dev_info(lt9611->dev, "video input changed\n"); 425 regmap_write(lt9611->regmap, 0x829e, 0xff); 426 regmap_write(lt9611->regmap, 0x829e, 0xf7); 427 regmap_write(lt9611->regmap, 0x8204, 0xff); 428 regmap_write(lt9611->regmap, 0x8204, 0xfe); 429 } 430 431 return IRQ_HANDLED; 432} 433 434static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) 435{ 436 unsigned int val; 437 438 regmap_read(lt9611->regmap, 0x8203, &val); 439 440 val &= ~0xc0; 441 regmap_write(lt9611->regmap, 0x8203, val); 442 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */ 443 regmap_write(lt9611->regmap, 0x8207, 0x3f); 444} 445 446static void lt9611_sleep_setup(struct lt9611 *lt9611) 447{ 448 const struct reg_sequence sleep_setup[] = { 449 { 0x8024, 0x76 }, 450 { 0x8023, 0x01 }, 451 { 0x8157, 0x03 }, /* set addr pin as output */ 452 { 0x8149, 0x0b }, 453 454 { 0x8102, 0x48 }, /* MIPI Rx power down */ 455 { 0x8123, 0x80 }, 456 { 0x8130, 0x00 }, 457 { 0x8011, 0x0a }, 458 }; 459 460 regmap_multi_reg_write(lt9611->regmap, 461 sleep_setup, ARRAY_SIZE(sleep_setup)); 462 lt9611->sleep = true; 463} 464 465static int lt9611_power_on(struct lt9611 *lt9611) 466{ 467 int ret; 468 const struct reg_sequence seq[] = { 469 /* LT9611_System_Init */ 470 { 0x8101, 0x18 }, /* sel xtal clock */ 471 472 /* timer for frequency meter */ 473 { 0x821b, 0x69 }, /* timer 2 */ 474 { 0x821c, 0x78 }, 475 { 0x82cb, 0x69 }, /* timer 1 */ 476 { 0x82cc, 0x78 }, 477 478 /* irq init */ 479 { 0x8251, 0x01 }, 480 { 0x8258, 0x0a }, /* hpd irq */ 481 { 0x8259, 0x80 }, /* hpd debounce width */ 482 { 0x829e, 0xf7 }, /* video check irq */ 483 484 /* power consumption for work */ 485 { 0x8004, 0xf0 }, 486 { 0x8006, 0xf0 }, 487 { 0x800a, 0x80 }, 488 { 0x800b, 0x40 }, 489 { 0x800d, 0xef }, 490 { 0x8011, 0xfa }, 491 }; 492 493 if (lt9611->power_on) 494 return 0; 495 496 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); 497 if (!ret) 498 lt9611->power_on = true; 499 500 return ret; 501} 502 503static int lt9611_power_off(struct lt9611 *lt9611) 504{ 505 int ret; 506 507 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 508 if (!ret) 509 lt9611->power_on = false; 510 511 return ret; 512} 513 514static void lt9611_reset(struct lt9611 *lt9611) 515{ 516 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 517 msleep(20); 518 519 gpiod_set_value_cansleep(lt9611->reset_gpio, 0); 520 msleep(20); 521 522 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 523 msleep(100); 524} 525 526static void lt9611_assert_5v(struct lt9611 *lt9611) 527{ 528 if (!lt9611->enable_gpio) 529 return; 530 531 gpiod_set_value_cansleep(lt9611->enable_gpio, 1); 532 msleep(20); 533} 534 535static int lt9611_regulator_init(struct lt9611 *lt9611) 536{ 537 int ret; 538 539 lt9611->supplies[0].supply = "vdd"; 540 lt9611->supplies[1].supply = "vcc"; 541 542 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); 543 if (ret < 0) 544 return ret; 545 546 return regulator_set_load(lt9611->supplies[0].consumer, 300000); 547} 548 549static int lt9611_regulator_enable(struct lt9611 *lt9611) 550{ 551 int ret; 552 553 ret = regulator_enable(lt9611->supplies[0].consumer); 554 if (ret < 0) 555 return ret; 556 557 usleep_range(1000, 10000); 558 559 ret = regulator_enable(lt9611->supplies[1].consumer); 560 if (ret < 0) { 561 regulator_disable(lt9611->supplies[0].consumer); 562 return ret; 563 } 564 565 return 0; 566} 567 568static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode) 569{ 570 int i; 571 572 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) { 573 if (lt9611_modes[i].hdisplay == mode->hdisplay && 574 lt9611_modes[i].vdisplay == mode->vdisplay && 575 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 576 return <9611_modes[i]; 577 } 578 } 579 580 return NULL; 581} 582 583/* connector funcs */ 584static enum drm_connector_status 585lt9611_connector_detect(struct drm_connector *connector, bool force) 586{ 587 struct lt9611 *lt9611 = connector_to_lt9611(connector); 588 unsigned int reg_val = 0; 589 int connected = 0; 590 591 regmap_read(lt9611->regmap, 0x825e, ®_val); 592 connected = (reg_val & BIT(2)); 593 594 lt9611->status = connected ? connector_status_connected : 595 connector_status_disconnected; 596 597 return lt9611->status; 598} 599 600static int lt9611_read_edid(struct lt9611 *lt9611) 601{ 602 unsigned int temp; 603 int ret = 0; 604 int i, j; 605 606 /* memset to clear old buffer, if any */ 607 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf)); 608 609 regmap_write(lt9611->regmap, 0x8503, 0xc9); 610 611 /* 0xA0 is EDID device address */ 612 regmap_write(lt9611->regmap, 0x8504, 0xa0); 613 /* 0x00 is EDID offset address */ 614 regmap_write(lt9611->regmap, 0x8505, 0x00); 615 616 /* length for read */ 617 regmap_write(lt9611->regmap, 0x8506, EDID_LEN); 618 regmap_write(lt9611->regmap, 0x8514, 0x7f); 619 620 for (i = 0; i < EDID_LOOP; i++) { 621 /* offset address */ 622 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN); 623 regmap_write(lt9611->regmap, 0x8507, 0x36); 624 regmap_write(lt9611->regmap, 0x8507, 0x31); 625 regmap_write(lt9611->regmap, 0x8507, 0x37); 626 usleep_range(5000, 10000); 627 628 regmap_read(lt9611->regmap, 0x8540, &temp); 629 630 if (temp & KEY_DDC_ACCS_DONE) { 631 for (j = 0; j < EDID_LEN; j++) { 632 regmap_read(lt9611->regmap, 0x8583, &temp); 633 lt9611->edid_buf[i * EDID_LEN + j] = temp; 634 } 635 636 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */ 637 dev_err(lt9611->dev, "read edid failed: no ack\n"); 638 ret = -EIO; 639 goto end; 640 641 } else { 642 dev_err(lt9611->dev, "read edid failed: access not done\n"); 643 ret = -EIO; 644 goto end; 645 } 646 } 647 648end: 649 regmap_write(lt9611->regmap, 0x8507, 0x1f); 650 return ret; 651} 652 653static int 654lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 655{ 656 struct lt9611 *lt9611 = data; 657 int ret; 658 659 if (len > 128) 660 return -EINVAL; 661 662 /* supports up to 1 extension block */ 663 /* TODO: add support for more extension blocks */ 664 if (block > 1) 665 return -EINVAL; 666 667 if (block == 0) { 668 ret = lt9611_read_edid(lt9611); 669 if (ret) { 670 dev_err(lt9611->dev, "edid read failed\n"); 671 return ret; 672 } 673 } 674 675 block %= 2; 676 memcpy(buf, lt9611->edid_buf + (block * 128), len); 677 678 return 0; 679} 680 681static int lt9611_connector_get_modes(struct drm_connector *connector) 682{ 683 struct lt9611 *lt9611 = connector_to_lt9611(connector); 684 unsigned int count; 685 struct edid *edid; 686 687 lt9611_power_on(lt9611); 688 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 689 drm_connector_update_edid_property(connector, edid); 690 count = drm_add_edid_modes(connector, edid); 691 kfree(edid); 692 693 return count; 694} 695 696static enum drm_mode_status 697lt9611_connector_mode_valid(struct drm_connector *connector, 698 struct drm_display_mode *mode) 699{ 700 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 701 702 return lt9611_mode ? MODE_OK : MODE_BAD; 703} 704 705/* bridge funcs */ 706static void lt9611_bridge_enable(struct drm_bridge *bridge) 707{ 708 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 709 710 if (lt9611_power_on(lt9611)) { 711 dev_err(lt9611->dev, "power on failed\n"); 712 return; 713 } 714 715 lt9611_mipi_input_analog(lt9611); 716 lt9611_hdmi_tx_digital(lt9611); 717 lt9611_hdmi_tx_phy(lt9611); 718 719 msleep(500); 720 721 lt9611_video_check(lt9611); 722 723 /* Enable HDMI output */ 724 regmap_write(lt9611->regmap, 0x8130, 0xea); 725} 726 727static void lt9611_bridge_disable(struct drm_bridge *bridge) 728{ 729 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 730 int ret; 731 732 /* Disable HDMI output */ 733 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 734 if (ret) { 735 dev_err(lt9611->dev, "video on failed\n"); 736 return; 737 } 738 739 if (lt9611_power_off(lt9611)) { 740 dev_err(lt9611->dev, "power on failed\n"); 741 return; 742 } 743} 744 745static struct 746drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { 747 .get_modes = lt9611_connector_get_modes, 748 .mode_valid = lt9611_connector_mode_valid, 749}; 750 751static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { 752 .fill_modes = drm_helper_probe_single_connector_modes, 753 .detect = lt9611_connector_detect, 754 .destroy = drm_connector_cleanup, 755 .reset = drm_atomic_helper_connector_reset, 756 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 757 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 758}; 759 760static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 761 struct device_node *dsi_node) 762{ 763 const struct mipi_dsi_device_info info = { "lt9611", 0, lt9611->dev->of_node}; 764 struct mipi_dsi_device *dsi; 765 struct mipi_dsi_host *host; 766 int ret; 767 768 host = of_find_mipi_dsi_host_by_node(dsi_node); 769 if (!host) { 770 dev_err(lt9611->dev, "failed to find dsi host\n"); 771 return ERR_PTR(-EPROBE_DEFER); 772 } 773 774 dsi = mipi_dsi_device_register_full(host, &info); 775 if (IS_ERR(dsi)) { 776 dev_err(lt9611->dev, "failed to create dsi device\n"); 777 return dsi; 778 } 779 780 dsi->lanes = 4; 781 dsi->format = MIPI_DSI_FMT_RGB888; 782 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 783 MIPI_DSI_MODE_VIDEO_HSE; 784 785 ret = mipi_dsi_attach(dsi); 786 if (ret < 0) { 787 dev_err(lt9611->dev, "failed to attach dsi to host\n"); 788 mipi_dsi_device_unregister(dsi); 789 return ERR_PTR(ret); 790 } 791 792 return dsi; 793} 794 795static void lt9611_bridge_detach(struct drm_bridge *bridge) 796{ 797 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 798 799 if (lt9611->dsi1) { 800 mipi_dsi_detach(lt9611->dsi1); 801 mipi_dsi_device_unregister(lt9611->dsi1); 802 } 803 804 mipi_dsi_detach(lt9611->dsi0); 805 mipi_dsi_device_unregister(lt9611->dsi0); 806} 807 808static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611) 809{ 810 int ret; 811 812 ret = drm_connector_init(bridge->dev, <9611->connector, 813 <9611_bridge_connector_funcs, 814 DRM_MODE_CONNECTOR_HDMIA); 815 if (ret) { 816 DRM_ERROR("Failed to initialize connector with drm\n"); 817 return ret; 818 } 819 820 drm_connector_helper_add(<9611->connector, 821 <9611_bridge_connector_helper_funcs); 822 823 if (!bridge->encoder) { 824 DRM_ERROR("Parent encoder object not found"); 825 return -ENODEV; 826 } 827 828 drm_connector_attach_encoder(<9611->connector, bridge->encoder); 829 830 return 0; 831} 832 833static int lt9611_bridge_attach(struct drm_bridge *bridge, 834 enum drm_bridge_attach_flags flags) 835{ 836 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 837 int ret; 838 839 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 840 ret = lt9611_connector_init(bridge, lt9611); 841 if (ret < 0) 842 return ret; 843 } 844 845 /* Attach primary DSI */ 846 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 847 if (IS_ERR(lt9611->dsi0)) 848 return PTR_ERR(lt9611->dsi0); 849 850 /* Attach secondary DSI, if specified */ 851 if (lt9611->dsi1_node) { 852 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 853 if (IS_ERR(lt9611->dsi1)) { 854 ret = PTR_ERR(lt9611->dsi1); 855 goto err_unregister_dsi0; 856 } 857 } 858 859 return 0; 860 861err_unregister_dsi0: 862 lt9611_bridge_detach(bridge); 863 drm_connector_cleanup(<9611->connector); 864 mipi_dsi_device_unregister(lt9611->dsi0); 865 866 return ret; 867} 868 869static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 870 const struct drm_display_info *info, 871 const struct drm_display_mode *mode) 872{ 873 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 874 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 875 876 if (!lt9611_mode) 877 return MODE_BAD; 878 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) 879 return MODE_PANEL; 880 else 881 return MODE_OK; 882} 883 884static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) 885{ 886 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 887 static const struct reg_sequence reg_cfg[] = { 888 { 0x8102, 0x12 }, 889 { 0x8123, 0x40 }, 890 { 0x8130, 0xea }, 891 { 0x8011, 0xfa }, 892 }; 893 894 if (!lt9611->sleep) 895 return; 896 897 regmap_multi_reg_write(lt9611->regmap, 898 reg_cfg, ARRAY_SIZE(reg_cfg)); 899 900 lt9611->sleep = false; 901} 902 903static void lt9611_bridge_post_disable(struct drm_bridge *bridge) 904{ 905 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 906 907 lt9611_sleep_setup(lt9611); 908} 909 910static void lt9611_bridge_mode_set(struct drm_bridge *bridge, 911 const struct drm_display_mode *mode, 912 const struct drm_display_mode *adj_mode) 913{ 914 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 915 struct hdmi_avi_infoframe avi_frame; 916 unsigned int postdiv; 917 int ret; 918 919 lt9611_bridge_pre_enable(bridge); 920 921 lt9611_mipi_input_digital(lt9611, mode); 922 lt9611_pll_setup(lt9611, mode, &postdiv); 923 lt9611_mipi_video_setup(lt9611, mode); 924 lt9611_pcr_setup(lt9611, mode, postdiv); 925 926 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, 927 <9611->connector, 928 mode); 929 if (!ret) 930 lt9611->vic = avi_frame.video_code; 931} 932 933static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 934{ 935 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 936 unsigned int reg_val = 0; 937 int connected; 938 939 regmap_read(lt9611->regmap, 0x825e, ®_val); 940 connected = reg_val & BIT(2); 941 942 lt9611->status = connected ? connector_status_connected : 943 connector_status_disconnected; 944 945 return lt9611->status; 946} 947 948static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge, 949 struct drm_connector *connector) 950{ 951 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 952 953 lt9611_power_on(lt9611); 954 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 955} 956 957static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 958{ 959 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 960 961 lt9611_enable_hpd_interrupts(lt9611); 962} 963 964static const struct drm_bridge_funcs lt9611_bridge_funcs = { 965 .attach = lt9611_bridge_attach, 966 .detach = lt9611_bridge_detach, 967 .mode_valid = lt9611_bridge_mode_valid, 968 .enable = lt9611_bridge_enable, 969 .disable = lt9611_bridge_disable, 970 .post_disable = lt9611_bridge_post_disable, 971 .mode_set = lt9611_bridge_mode_set, 972 .detect = lt9611_bridge_detect, 973 .get_edid = lt9611_bridge_get_edid, 974 .hpd_enable = lt9611_bridge_hpd_enable, 975}; 976 977static int lt9611_parse_dt(struct device *dev, 978 struct lt9611 *lt9611) 979{ 980 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 981 if (!lt9611->dsi0_node) { 982 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 983 return -ENODEV; 984 } 985 986 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 987 988 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 989 990 return 0; 991} 992 993static int lt9611_gpio_init(struct lt9611 *lt9611) 994{ 995 struct device *dev = lt9611->dev; 996 997 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 998 if (IS_ERR(lt9611->reset_gpio)) { 999 dev_err(dev, "failed to acquire reset gpio\n"); 1000 return PTR_ERR(lt9611->reset_gpio); 1001 } 1002 1003 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 1004 GPIOD_OUT_LOW); 1005 if (IS_ERR(lt9611->enable_gpio)) { 1006 dev_err(dev, "failed to acquire enable gpio\n"); 1007 return PTR_ERR(lt9611->enable_gpio); 1008 } 1009 1010 return 0; 1011} 1012 1013static int lt9611_read_device_rev(struct lt9611 *lt9611) 1014{ 1015 unsigned int rev; 1016 int ret; 1017 1018 regmap_write(lt9611->regmap, 0x80ee, 0x01); 1019 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 1020 if (ret) 1021 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 1022 else 1023 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 1024 1025 return ret; 1026} 1027 1028static int lt9611_hdmi_hw_params(struct device *dev, void *data, 1029 struct hdmi_codec_daifmt *fmt, 1030 struct hdmi_codec_params *hparms) 1031{ 1032 struct lt9611 *lt9611 = data; 1033 1034 if (hparms->sample_rate == 48000) 1035 regmap_write(lt9611->regmap, 0x840f, 0x2b); 1036 else if (hparms->sample_rate == 96000) 1037 regmap_write(lt9611->regmap, 0x840f, 0xab); 1038 else 1039 return -EINVAL; 1040 1041 regmap_write(lt9611->regmap, 0x8435, 0x00); 1042 regmap_write(lt9611->regmap, 0x8436, 0x18); 1043 regmap_write(lt9611->regmap, 0x8437, 0x00); 1044 1045 return 0; 1046} 1047 1048static int lt9611_audio_startup(struct device *dev, void *data) 1049{ 1050 struct lt9611 *lt9611 = data; 1051 1052 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 1053 regmap_write(lt9611->regmap, 0x82d7, 0x04); 1054 1055 regmap_write(lt9611->regmap, 0x8406, 0x08); 1056 regmap_write(lt9611->regmap, 0x8407, 0x10); 1057 1058 regmap_write(lt9611->regmap, 0x8434, 0xd5); 1059 1060 return 0; 1061} 1062 1063static void lt9611_audio_shutdown(struct device *dev, void *data) 1064{ 1065 struct lt9611 *lt9611 = data; 1066 1067 regmap_write(lt9611->regmap, 0x8406, 0x00); 1068 regmap_write(lt9611->regmap, 0x8407, 0x00); 1069} 1070 1071static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1072 struct device_node *endpoint) 1073{ 1074 struct of_endpoint of_ep; 1075 int ret; 1076 1077 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1078 if (ret < 0) 1079 return ret; 1080 1081 /* 1082 * HDMI sound should be located as reg = <2> 1083 * Then, it is sound port 0 1084 */ 1085 if (of_ep.port == 2) 1086 return 0; 1087 1088 return -EINVAL; 1089} 1090 1091static const struct hdmi_codec_ops lt9611_codec_ops = { 1092 .hw_params = lt9611_hdmi_hw_params, 1093 .audio_shutdown = lt9611_audio_shutdown, 1094 .audio_startup = lt9611_audio_startup, 1095 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1096}; 1097 1098static struct hdmi_codec_pdata codec_data = { 1099 .ops = <9611_codec_ops, 1100 .max_i2s_channels = 8, 1101 .i2s = 1, 1102}; 1103 1104static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1105{ 1106 codec_data.data = lt9611; 1107 lt9611->audio_pdev = 1108 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1109 PLATFORM_DEVID_AUTO, 1110 &codec_data, sizeof(codec_data)); 1111 1112 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1113} 1114 1115static void lt9611_audio_exit(struct lt9611 *lt9611) 1116{ 1117 if (lt9611->audio_pdev) { 1118 platform_device_unregister(lt9611->audio_pdev); 1119 lt9611->audio_pdev = NULL; 1120 } 1121} 1122 1123static int lt9611_probe(struct i2c_client *client, 1124 const struct i2c_device_id *id) 1125{ 1126 struct lt9611 *lt9611; 1127 struct device *dev = &client->dev; 1128 int ret; 1129 1130 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1131 dev_err(dev, "device doesn't support I2C\n"); 1132 return -ENODEV; 1133 } 1134 1135 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1136 if (!lt9611) 1137 return -ENOMEM; 1138 1139 lt9611->dev = &client->dev; 1140 lt9611->client = client; 1141 lt9611->sleep = false; 1142 1143 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1144 if (IS_ERR(lt9611->regmap)) { 1145 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1146 return PTR_ERR(lt9611->regmap); 1147 } 1148 1149 ret = lt9611_parse_dt(&client->dev, lt9611); 1150 if (ret) { 1151 dev_err(dev, "failed to parse device tree\n"); 1152 return ret; 1153 } 1154 1155 ret = lt9611_gpio_init(lt9611); 1156 if (ret < 0) 1157 goto err_of_put; 1158 1159 ret = lt9611_regulator_init(lt9611); 1160 if (ret < 0) 1161 goto err_of_put; 1162 1163 lt9611_assert_5v(lt9611); 1164 1165 ret = lt9611_regulator_enable(lt9611); 1166 if (ret) 1167 goto err_of_put; 1168 1169 lt9611_reset(lt9611); 1170 1171 ret = lt9611_read_device_rev(lt9611); 1172 if (ret) { 1173 dev_err(dev, "failed to read chip rev\n"); 1174 goto err_disable_regulators; 1175 } 1176 1177 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1178 lt9611_irq_thread_handler, 1179 IRQF_ONESHOT, "lt9611", lt9611); 1180 if (ret) { 1181 dev_err(dev, "failed to request irq\n"); 1182 goto err_disable_regulators; 1183 } 1184 1185 i2c_set_clientdata(client, lt9611); 1186 1187 lt9611->bridge.funcs = <9611_bridge_funcs; 1188 lt9611->bridge.of_node = client->dev.of_node; 1189 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1190 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1191 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1192 1193 drm_bridge_add(<9611->bridge); 1194 1195 lt9611_enable_hpd_interrupts(lt9611); 1196 1197 return lt9611_audio_init(dev, lt9611); 1198 1199err_disable_regulators: 1200 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1201 1202err_of_put: 1203 of_node_put(lt9611->dsi1_node); 1204 of_node_put(lt9611->dsi0_node); 1205 1206 return ret; 1207} 1208 1209static int lt9611_remove(struct i2c_client *client) 1210{ 1211 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1212 1213 disable_irq(client->irq); 1214 lt9611_audio_exit(lt9611); 1215 drm_bridge_remove(<9611->bridge); 1216 1217 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1218 1219 of_node_put(lt9611->dsi1_node); 1220 of_node_put(lt9611->dsi0_node); 1221 1222 return 0; 1223} 1224 1225static struct i2c_device_id lt9611_id[] = { 1226 { "lontium,lt9611", 0 }, 1227 {} 1228}; 1229MODULE_DEVICE_TABLE(i2c, lt9611_id); 1230 1231static const struct of_device_id lt9611_match_table[] = { 1232 { .compatible = "lontium,lt9611" }, 1233 { } 1234}; 1235MODULE_DEVICE_TABLE(of, lt9611_match_table); 1236 1237static struct i2c_driver lt9611_driver = { 1238 .driver = { 1239 .name = "lt9611", 1240 .of_match_table = lt9611_match_table, 1241 }, 1242 .probe = lt9611_probe, 1243 .remove = lt9611_remove, 1244 .id_table = lt9611_id, 1245}; 1246module_i2c_driver(lt9611_driver); 1247 1248MODULE_LICENSE("GPL v2"); 1249