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 31 struct 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 64 static 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 77 static 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 85 struct lt9611_mode { 86 u16 hdisplay; 87 u16 vdisplay; 88 u8 vrefresh; 89 u8 lanes; 90 u8 intfs; 91 }; 92 93 static 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 }; 102 103 static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) 104 { 105 return container_of(bridge, struct lt9611, bridge); 106 } 107 108 static struct lt9611 *connector_to_lt9611(struct drm_connector *connector) 109 { 110 return container_of(connector, struct lt9611, connector); 111 } 112 113 static 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 } 129 130 static 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 } 147 148 static 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 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256)); 190 } 191 192 static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode) 193 { 194 const struct reg_sequence reg_cfg[] = { 195 { 0x830b, 0x01 }, 196 { 0x830c, 0x10 }, 197 { 0x8348, 0x00 }, 198 { 0x8349, 0x81 }, 199 200 /* stage 1 */ 201 { 0x8321, 0x4a }, 202 { 0x8324, 0x71 }, 203 { 0x8325, 0x30 }, 204 { 0x832a, 0x01 }, 205 206 /* stage 2 */ 207 { 0x834a, 0x40 }, 208 { 0x831d, 0x10 }, 209 210 /* MK limit */ 211 { 0x832d, 0x38 }, 212 { 0x8331, 0x08 }, 213 }; 214 const struct reg_sequence reg_cfg2[] = { 215 { 0x830b, 0x03 }, 216 { 0x830c, 0xd0 }, 217 { 0x8348, 0x03 }, 218 { 0x8349, 0xe0 }, 219 { 0x8324, 0x72 }, 220 { 0x8325, 0x00 }, 221 { 0x832a, 0x01 }, 222 { 0x834a, 0x10 }, 223 { 0x831d, 0x10 }, 224 { 0x8326, 0x37 }, 225 }; 226 227 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 228 229 switch (mode->hdisplay) { 230 case 640: 231 regmap_write(lt9611->regmap, 0x8326, 0x14); 232 break; 233 case 1920: 234 regmap_write(lt9611->regmap, 0x8326, 0x37); 235 break; 236 case 3840: 237 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2)); 238 break; 239 } 240 241 /* pcr rst */ 242 regmap_write(lt9611->regmap, 0x8011, 0x5a); 243 regmap_write(lt9611->regmap, 0x8011, 0xfa); 244 } 245 246 static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode) 247 { 248 unsigned int pclk = mode->clock; 249 const struct reg_sequence reg_cfg[] = { 250 /* txpll init */ 251 { 0x8123, 0x40 }, 252 { 0x8124, 0x64 }, 253 { 0x8125, 0x80 }, 254 { 0x8126, 0x55 }, 255 { 0x812c, 0x37 }, 256 { 0x812f, 0x01 }, 257 { 0x8126, 0x55 }, 258 { 0x8127, 0x66 }, 259 { 0x8128, 0x88 }, 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 else if (pclk > 70000) 267 regmap_write(lt9611->regmap, 0x812d, 0x99); 268 else 269 regmap_write(lt9611->regmap, 0x812d, 0xaa); 270 271 /* 272 * first divide pclk by 2 first 273 * - write divide by 64k to 19:16 bits which means shift by 17 274 * - write divide by 256 to 15:8 bits which means shift by 9 275 * - write remainder to 7:0 bits, which means shift by 1 276 */ 277 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ 278 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ 279 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ 280 281 regmap_write(lt9611->regmap, 0x82de, 0x20); 282 regmap_write(lt9611->regmap, 0x82de, 0xe0); 283 284 regmap_write(lt9611->regmap, 0x8016, 0xf1); 285 regmap_write(lt9611->regmap, 0x8016, 0xf3); 286 287 return 0; 288 } 289 290 static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg) 291 { 292 unsigned int temp, temp2; 293 int ret; 294 295 ret = regmap_read(lt9611->regmap, reg, &temp); 296 if (ret) 297 return ret; 298 temp <<= 8; 299 ret = regmap_read(lt9611->regmap, reg + 1, &temp2); 300 if (ret) 301 return ret; 302 303 return (temp + temp2); 304 } 305 306 static int lt9611_video_check(struct lt9611 *lt9611) 307 { 308 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk; 309 int temp; 310 311 /* top module video check */ 312 313 /* vactive */ 314 temp = lt9611_read_video_check(lt9611, 0x8282); 315 if (temp < 0) 316 goto end; 317 vactive = temp; 318 319 /* v_total */ 320 temp = lt9611_read_video_check(lt9611, 0x826c); 321 if (temp < 0) 322 goto end; 323 v_total = temp; 324 325 /* h_total_sysclk */ 326 temp = lt9611_read_video_check(lt9611, 0x8286); 327 if (temp < 0) 328 goto end; 329 h_total_sysclk = temp; 330 331 /* hactive_a */ 332 temp = lt9611_read_video_check(lt9611, 0x8382); 333 if (temp < 0) 334 goto end; 335 hactive_a = temp / 3; 336 337 /* hactive_b */ 338 temp = lt9611_read_video_check(lt9611, 0x8386); 339 if (temp < 0) 340 goto end; 341 hactive_b = temp / 3; 342 343 dev_info(lt9611->dev, 344 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n", 345 hactive_a, hactive_b, vactive, v_total, h_total_sysclk); 346 347 return 0; 348 349 end: 350 dev_err(lt9611->dev, "read video check error\n"); 351 return temp; 352 } 353 354 static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611) 355 { 356 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic); 357 regmap_write(lt9611->regmap, 0x8447, lt9611->vic); 358 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */ 359 360 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 361 regmap_write(lt9611->regmap, 0x82d7, 0x04); 362 } 363 364 static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) 365 { 366 struct reg_sequence reg_cfg[] = { 367 { 0x8130, 0x6a }, 368 { 0x8131, 0x44 }, /* HDMI DC mode */ 369 { 0x8132, 0x4a }, 370 { 0x8133, 0x0b }, 371 { 0x8134, 0x00 }, 372 { 0x8135, 0x00 }, 373 { 0x8136, 0x00 }, 374 { 0x8137, 0x44 }, 375 { 0x813f, 0x0f }, 376 { 0x8140, 0xa0 }, 377 { 0x8141, 0xa0 }, 378 { 0x8142, 0xa0 }, 379 { 0x8143, 0xa0 }, 380 { 0x8144, 0x0a }, 381 }; 382 383 /* HDMI AC mode */ 384 if (lt9611->ac_mode) 385 reg_cfg[2].def = 0x73; 386 387 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 388 } 389 390 static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) 391 { 392 struct lt9611 *lt9611 = dev_id; 393 unsigned int irq_flag0 = 0; 394 unsigned int irq_flag3 = 0; 395 396 regmap_read(lt9611->regmap, 0x820f, &irq_flag3); 397 regmap_read(lt9611->regmap, 0x820c, &irq_flag0); 398 399 /* hpd changed low */ 400 if (irq_flag3 & 0x80) { 401 dev_info(lt9611->dev, "hdmi cable disconnected\n"); 402 403 regmap_write(lt9611->regmap, 0x8207, 0xbf); 404 regmap_write(lt9611->regmap, 0x8207, 0x3f); 405 } 406 407 /* hpd changed high */ 408 if (irq_flag3 & 0x40) { 409 dev_info(lt9611->dev, "hdmi cable connected\n"); 410 411 regmap_write(lt9611->regmap, 0x8207, 0x7f); 412 regmap_write(lt9611->regmap, 0x8207, 0x3f); 413 } 414 415 if (irq_flag3 & 0xc0 && lt9611->bridge.dev) 416 drm_kms_helper_hotplug_event(lt9611->bridge.dev); 417 418 /* video input changed */ 419 if (irq_flag0 & 0x01) { 420 dev_info(lt9611->dev, "video input changed\n"); 421 regmap_write(lt9611->regmap, 0x829e, 0xff); 422 regmap_write(lt9611->regmap, 0x829e, 0xf7); 423 regmap_write(lt9611->regmap, 0x8204, 0xff); 424 regmap_write(lt9611->regmap, 0x8204, 0xfe); 425 } 426 427 return IRQ_HANDLED; 428 } 429 430 static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) 431 { 432 unsigned int val; 433 434 regmap_read(lt9611->regmap, 0x8203, &val); 435 436 val &= ~0xc0; 437 regmap_write(lt9611->regmap, 0x8203, val); 438 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */ 439 regmap_write(lt9611->regmap, 0x8207, 0x3f); 440 } 441 442 static void lt9611_sleep_setup(struct lt9611 *lt9611) 443 { 444 const struct reg_sequence sleep_setup[] = { 445 { 0x8024, 0x76 }, 446 { 0x8023, 0x01 }, 447 { 0x8157, 0x03 }, /* set addr pin as output */ 448 { 0x8149, 0x0b }, 449 { 0x8151, 0x30 }, /* disable IRQ */ 450 { 0x8102, 0x48 }, /* MIPI Rx power down */ 451 { 0x8123, 0x80 }, 452 { 0x8130, 0x00 }, 453 { 0x8100, 0x01 }, /* bandgap power down */ 454 { 0x8101, 0x00 }, /* system clk power down */ 455 }; 456 457 regmap_multi_reg_write(lt9611->regmap, 458 sleep_setup, ARRAY_SIZE(sleep_setup)); 459 lt9611->sleep = true; 460 } 461 462 static int lt9611_power_on(struct lt9611 *lt9611) 463 { 464 int ret; 465 const struct reg_sequence seq[] = { 466 /* LT9611_System_Init */ 467 { 0x8101, 0x18 }, /* sel xtal clock */ 468 469 /* timer for frequency meter */ 470 { 0x821b, 0x69 }, /* timer 2 */ 471 { 0x821c, 0x78 }, 472 { 0x82cb, 0x69 }, /* timer 1 */ 473 { 0x82cc, 0x78 }, 474 475 /* irq init */ 476 { 0x8251, 0x01 }, 477 { 0x8258, 0x0a }, /* hpd irq */ 478 { 0x8259, 0x80 }, /* hpd debounce width */ 479 { 0x829e, 0xf7 }, /* video check irq */ 480 481 /* power consumption for work */ 482 { 0x8004, 0xf0 }, 483 { 0x8006, 0xf0 }, 484 { 0x800a, 0x80 }, 485 { 0x800b, 0x40 }, 486 { 0x800d, 0xef }, 487 { 0x8011, 0xfa }, 488 }; 489 490 if (lt9611->power_on) 491 return 0; 492 493 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); 494 if (!ret) 495 lt9611->power_on = true; 496 497 return ret; 498 } 499 500 static int lt9611_power_off(struct lt9611 *lt9611) 501 { 502 int ret; 503 504 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 505 if (!ret) 506 lt9611->power_on = false; 507 508 return ret; 509 } 510 511 static void lt9611_reset(struct lt9611 *lt9611) 512 { 513 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 514 msleep(20); 515 516 gpiod_set_value_cansleep(lt9611->reset_gpio, 0); 517 msleep(20); 518 519 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 520 msleep(100); 521 } 522 523 static void lt9611_assert_5v(struct lt9611 *lt9611) 524 { 525 if (!lt9611->enable_gpio) 526 return; 527 528 gpiod_set_value_cansleep(lt9611->enable_gpio, 1); 529 msleep(20); 530 } 531 532 static int lt9611_regulator_init(struct lt9611 *lt9611) 533 { 534 int ret; 535 536 lt9611->supplies[0].supply = "vdd"; 537 lt9611->supplies[1].supply = "vcc"; 538 539 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); 540 if (ret < 0) 541 return ret; 542 543 return regulator_set_load(lt9611->supplies[0].consumer, 300000); 544 } 545 546 static int lt9611_regulator_enable(struct lt9611 *lt9611) 547 { 548 int ret; 549 550 ret = regulator_enable(lt9611->supplies[0].consumer); 551 if (ret < 0) 552 return ret; 553 554 usleep_range(1000, 10000); 555 556 ret = regulator_enable(lt9611->supplies[1].consumer); 557 if (ret < 0) { 558 regulator_disable(lt9611->supplies[0].consumer); 559 return ret; 560 } 561 562 return 0; 563 } 564 565 static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode) 566 { 567 int i; 568 569 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) { 570 if (lt9611_modes[i].hdisplay == mode->hdisplay && 571 lt9611_modes[i].vdisplay == mode->vdisplay && 572 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 573 return <9611_modes[i]; 574 } 575 } 576 577 return NULL; 578 } 579 580 /* connector funcs */ 581 static enum drm_connector_status 582 lt9611_connector_detect(struct drm_connector *connector, bool force) 583 { 584 struct lt9611 *lt9611 = connector_to_lt9611(connector); 585 unsigned int reg_val = 0; 586 int connected = 0; 587 588 regmap_read(lt9611->regmap, 0x825e, ®_val); 589 connected = (reg_val & BIT(2)); 590 591 lt9611->status = connected ? connector_status_connected : 592 connector_status_disconnected; 593 594 return lt9611->status; 595 } 596 597 static int lt9611_read_edid(struct lt9611 *lt9611) 598 { 599 unsigned int temp; 600 int ret = 0; 601 int i, j; 602 603 /* memset to clear old buffer, if any */ 604 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf)); 605 606 regmap_write(lt9611->regmap, 0x8503, 0xc9); 607 608 /* 0xA0 is EDID device address */ 609 regmap_write(lt9611->regmap, 0x8504, 0xa0); 610 /* 0x00 is EDID offset address */ 611 regmap_write(lt9611->regmap, 0x8505, 0x00); 612 613 /* length for read */ 614 regmap_write(lt9611->regmap, 0x8506, EDID_LEN); 615 regmap_write(lt9611->regmap, 0x8514, 0x7f); 616 617 for (i = 0; i < EDID_LOOP; i++) { 618 /* offset address */ 619 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN); 620 regmap_write(lt9611->regmap, 0x8507, 0x36); 621 regmap_write(lt9611->regmap, 0x8507, 0x31); 622 regmap_write(lt9611->regmap, 0x8507, 0x37); 623 usleep_range(5000, 10000); 624 625 regmap_read(lt9611->regmap, 0x8540, &temp); 626 627 if (temp & KEY_DDC_ACCS_DONE) { 628 for (j = 0; j < EDID_LEN; j++) { 629 regmap_read(lt9611->regmap, 0x8583, &temp); 630 lt9611->edid_buf[i * EDID_LEN + j] = temp; 631 } 632 633 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */ 634 dev_err(lt9611->dev, "read edid failed: no ack\n"); 635 ret = -EIO; 636 goto end; 637 638 } else { 639 dev_err(lt9611->dev, "read edid failed: access not done\n"); 640 ret = -EIO; 641 goto end; 642 } 643 } 644 645 end: 646 regmap_write(lt9611->regmap, 0x8507, 0x1f); 647 return ret; 648 } 649 650 static int 651 lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 652 { 653 struct lt9611 *lt9611 = data; 654 int ret; 655 656 if (len > 128) 657 return -EINVAL; 658 659 /* supports up to 1 extension block */ 660 /* TODO: add support for more extension blocks */ 661 if (block > 1) 662 return -EINVAL; 663 664 if (block == 0) { 665 ret = lt9611_read_edid(lt9611); 666 if (ret) { 667 dev_err(lt9611->dev, "edid read failed\n"); 668 return ret; 669 } 670 } 671 672 block %= 2; 673 memcpy(buf, lt9611->edid_buf + (block * 128), len); 674 675 return 0; 676 } 677 678 static int lt9611_connector_get_modes(struct drm_connector *connector) 679 { 680 struct lt9611 *lt9611 = connector_to_lt9611(connector); 681 unsigned int count; 682 struct edid *edid; 683 684 lt9611_power_on(lt9611); 685 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 686 drm_connector_update_edid_property(connector, edid); 687 count = drm_add_edid_modes(connector, edid); 688 kfree(edid); 689 690 return count; 691 } 692 693 static enum drm_mode_status 694 lt9611_connector_mode_valid(struct drm_connector *connector, 695 struct drm_display_mode *mode) 696 { 697 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 698 699 return lt9611_mode ? MODE_OK : MODE_BAD; 700 } 701 702 /* bridge funcs */ 703 static void lt9611_bridge_enable(struct drm_bridge *bridge) 704 { 705 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 706 707 if (lt9611_power_on(lt9611)) { 708 dev_err(lt9611->dev, "power on failed\n"); 709 return; 710 } 711 712 lt9611_mipi_input_analog(lt9611); 713 lt9611_hdmi_tx_digital(lt9611); 714 lt9611_hdmi_tx_phy(lt9611); 715 716 msleep(500); 717 718 lt9611_video_check(lt9611); 719 720 /* Enable HDMI output */ 721 regmap_write(lt9611->regmap, 0x8130, 0xea); 722 } 723 724 static void lt9611_bridge_disable(struct drm_bridge *bridge) 725 { 726 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 727 int ret; 728 729 /* Disable HDMI output */ 730 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 731 if (ret) { 732 dev_err(lt9611->dev, "video on failed\n"); 733 return; 734 } 735 736 if (lt9611_power_off(lt9611)) { 737 dev_err(lt9611->dev, "power on failed\n"); 738 return; 739 } 740 } 741 742 static struct 743 drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { 744 .get_modes = lt9611_connector_get_modes, 745 .mode_valid = lt9611_connector_mode_valid, 746 }; 747 748 static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { 749 .fill_modes = drm_helper_probe_single_connector_modes, 750 .detect = lt9611_connector_detect, 751 .destroy = drm_connector_cleanup, 752 .reset = drm_atomic_helper_connector_reset, 753 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 754 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 755 }; 756 757 static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 758 struct device_node *dsi_node) 759 { 760 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL }; 761 struct mipi_dsi_device *dsi; 762 struct mipi_dsi_host *host; 763 int ret; 764 765 host = of_find_mipi_dsi_host_by_node(dsi_node); 766 if (!host) { 767 dev_err(lt9611->dev, "failed to find dsi host\n"); 768 return ERR_PTR(-EPROBE_DEFER); 769 } 770 771 dsi = mipi_dsi_device_register_full(host, &info); 772 if (IS_ERR(dsi)) { 773 dev_err(lt9611->dev, "failed to create dsi device\n"); 774 return dsi; 775 } 776 777 dsi->lanes = 4; 778 dsi->format = MIPI_DSI_FMT_RGB888; 779 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 780 MIPI_DSI_MODE_VIDEO_HSE; 781 782 ret = mipi_dsi_attach(dsi); 783 if (ret < 0) { 784 dev_err(lt9611->dev, "failed to attach dsi to host\n"); 785 mipi_dsi_device_unregister(dsi); 786 return ERR_PTR(ret); 787 } 788 789 return dsi; 790 } 791 792 static void lt9611_bridge_detach(struct drm_bridge *bridge) 793 { 794 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 795 796 if (lt9611->dsi1) { 797 mipi_dsi_detach(lt9611->dsi1); 798 mipi_dsi_device_unregister(lt9611->dsi1); 799 } 800 801 mipi_dsi_detach(lt9611->dsi0); 802 mipi_dsi_device_unregister(lt9611->dsi0); 803 } 804 805 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611) 806 { 807 int ret; 808 809 ret = drm_connector_init(bridge->dev, <9611->connector, 810 <9611_bridge_connector_funcs, 811 DRM_MODE_CONNECTOR_HDMIA); 812 if (ret) { 813 DRM_ERROR("Failed to initialize connector with drm\n"); 814 return ret; 815 } 816 817 drm_connector_helper_add(<9611->connector, 818 <9611_bridge_connector_helper_funcs); 819 drm_connector_attach_encoder(<9611->connector, bridge->encoder); 820 821 if (!bridge->encoder) { 822 DRM_ERROR("Parent encoder object not found"); 823 return -ENODEV; 824 } 825 826 return 0; 827 } 828 829 static int lt9611_bridge_attach(struct drm_bridge *bridge, 830 enum drm_bridge_attach_flags flags) 831 { 832 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 833 int ret; 834 835 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 836 ret = lt9611_connector_init(bridge, lt9611); 837 if (ret < 0) 838 return ret; 839 } 840 841 /* Attach primary DSI */ 842 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 843 if (IS_ERR(lt9611->dsi0)) 844 return PTR_ERR(lt9611->dsi0); 845 846 /* Attach secondary DSI, if specified */ 847 if (lt9611->dsi1_node) { 848 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 849 if (IS_ERR(lt9611->dsi1)) { 850 ret = PTR_ERR(lt9611->dsi1); 851 goto err_unregister_dsi0; 852 } 853 } 854 855 return 0; 856 857 err_unregister_dsi0: 858 lt9611_bridge_detach(bridge); 859 drm_connector_cleanup(<9611->connector); 860 mipi_dsi_device_unregister(lt9611->dsi0); 861 862 return ret; 863 } 864 865 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 866 const struct drm_display_info *info, 867 const struct drm_display_mode *mode) 868 { 869 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 870 871 return lt9611_mode ? MODE_OK : MODE_BAD; 872 } 873 874 static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) 875 { 876 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 877 878 if (!lt9611->sleep) 879 return; 880 881 lt9611_reset(lt9611); 882 regmap_write(lt9611->regmap, 0x80ee, 0x01); 883 884 lt9611->sleep = false; 885 } 886 887 static void lt9611_bridge_post_disable(struct drm_bridge *bridge) 888 { 889 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 890 891 lt9611_sleep_setup(lt9611); 892 } 893 894 static void lt9611_bridge_mode_set(struct drm_bridge *bridge, 895 const struct drm_display_mode *mode, 896 const struct drm_display_mode *adj_mode) 897 { 898 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 899 struct hdmi_avi_infoframe avi_frame; 900 int ret; 901 902 lt9611_bridge_pre_enable(bridge); 903 904 lt9611_mipi_input_digital(lt9611, mode); 905 lt9611_pll_setup(lt9611, mode); 906 lt9611_mipi_video_setup(lt9611, mode); 907 lt9611_pcr_setup(lt9611, mode); 908 909 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, 910 <9611->connector, 911 mode); 912 if (!ret) 913 lt9611->vic = avi_frame.video_code; 914 } 915 916 static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 917 { 918 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 919 unsigned int reg_val = 0; 920 int connected; 921 922 regmap_read(lt9611->regmap, 0x825e, ®_val); 923 connected = reg_val & BIT(2); 924 925 lt9611->status = connected ? connector_status_connected : 926 connector_status_disconnected; 927 928 return lt9611->status; 929 } 930 931 static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge, 932 struct drm_connector *connector) 933 { 934 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 935 936 lt9611_power_on(lt9611); 937 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 938 } 939 940 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 941 { 942 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 943 944 lt9611_enable_hpd_interrupts(lt9611); 945 } 946 947 static const struct drm_bridge_funcs lt9611_bridge_funcs = { 948 .attach = lt9611_bridge_attach, 949 .detach = lt9611_bridge_detach, 950 .mode_valid = lt9611_bridge_mode_valid, 951 .enable = lt9611_bridge_enable, 952 .disable = lt9611_bridge_disable, 953 .post_disable = lt9611_bridge_post_disable, 954 .mode_set = lt9611_bridge_mode_set, 955 .detect = lt9611_bridge_detect, 956 .get_edid = lt9611_bridge_get_edid, 957 .hpd_enable = lt9611_bridge_hpd_enable, 958 }; 959 960 static int lt9611_parse_dt(struct device *dev, 961 struct lt9611 *lt9611) 962 { 963 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 964 if (!lt9611->dsi0_node) { 965 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 966 return -ENODEV; 967 } 968 969 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 970 971 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 972 973 return 0; 974 } 975 976 static int lt9611_gpio_init(struct lt9611 *lt9611) 977 { 978 struct device *dev = lt9611->dev; 979 980 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 981 if (IS_ERR(lt9611->reset_gpio)) { 982 dev_err(dev, "failed to acquire reset gpio\n"); 983 return PTR_ERR(lt9611->reset_gpio); 984 } 985 986 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 987 GPIOD_OUT_LOW); 988 if (IS_ERR(lt9611->enable_gpio)) { 989 dev_err(dev, "failed to acquire enable gpio\n"); 990 return PTR_ERR(lt9611->enable_gpio); 991 } 992 993 return 0; 994 } 995 996 static int lt9611_read_device_rev(struct lt9611 *lt9611) 997 { 998 unsigned int rev; 999 int ret; 1000 1001 regmap_write(lt9611->regmap, 0x80ee, 0x01); 1002 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 1003 if (ret) 1004 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 1005 else 1006 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 1007 1008 return ret; 1009 } 1010 1011 static int lt9611_hdmi_hw_params(struct device *dev, void *data, 1012 struct hdmi_codec_daifmt *fmt, 1013 struct hdmi_codec_params *hparms) 1014 { 1015 struct lt9611 *lt9611 = data; 1016 1017 if (hparms->sample_rate == 48000) 1018 regmap_write(lt9611->regmap, 0x840f, 0x2b); 1019 else if (hparms->sample_rate == 96000) 1020 regmap_write(lt9611->regmap, 0x840f, 0xab); 1021 else 1022 return -EINVAL; 1023 1024 regmap_write(lt9611->regmap, 0x8435, 0x00); 1025 regmap_write(lt9611->regmap, 0x8436, 0x18); 1026 regmap_write(lt9611->regmap, 0x8437, 0x00); 1027 1028 return 0; 1029 } 1030 1031 static int lt9611_audio_startup(struct device *dev, void *data) 1032 { 1033 struct lt9611 *lt9611 = data; 1034 1035 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 1036 regmap_write(lt9611->regmap, 0x82d7, 0x04); 1037 1038 regmap_write(lt9611->regmap, 0x8406, 0x08); 1039 regmap_write(lt9611->regmap, 0x8407, 0x10); 1040 1041 regmap_write(lt9611->regmap, 0x8434, 0xd5); 1042 1043 return 0; 1044 } 1045 1046 static void lt9611_audio_shutdown(struct device *dev, void *data) 1047 { 1048 struct lt9611 *lt9611 = data; 1049 1050 regmap_write(lt9611->regmap, 0x8406, 0x00); 1051 regmap_write(lt9611->regmap, 0x8407, 0x00); 1052 } 1053 1054 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1055 struct device_node *endpoint) 1056 { 1057 struct of_endpoint of_ep; 1058 int ret; 1059 1060 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1061 if (ret < 0) 1062 return ret; 1063 1064 /* 1065 * HDMI sound should be located as reg = <2> 1066 * Then, it is sound port 0 1067 */ 1068 if (of_ep.port == 2) 1069 return 0; 1070 1071 return -EINVAL; 1072 } 1073 1074 static const struct hdmi_codec_ops lt9611_codec_ops = { 1075 .hw_params = lt9611_hdmi_hw_params, 1076 .audio_shutdown = lt9611_audio_shutdown, 1077 .audio_startup = lt9611_audio_startup, 1078 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1079 }; 1080 1081 static struct hdmi_codec_pdata codec_data = { 1082 .ops = <9611_codec_ops, 1083 .max_i2s_channels = 8, 1084 .i2s = 1, 1085 }; 1086 1087 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1088 { 1089 codec_data.data = lt9611; 1090 lt9611->audio_pdev = 1091 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1092 PLATFORM_DEVID_AUTO, 1093 &codec_data, sizeof(codec_data)); 1094 1095 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1096 } 1097 1098 static void lt9611_audio_exit(struct lt9611 *lt9611) 1099 { 1100 if (lt9611->audio_pdev) { 1101 platform_device_unregister(lt9611->audio_pdev); 1102 lt9611->audio_pdev = NULL; 1103 } 1104 } 1105 1106 static int lt9611_probe(struct i2c_client *client, 1107 const struct i2c_device_id *id) 1108 { 1109 struct lt9611 *lt9611; 1110 struct device *dev = &client->dev; 1111 int ret; 1112 1113 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1114 dev_err(dev, "device doesn't support I2C\n"); 1115 return -ENODEV; 1116 } 1117 1118 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1119 if (!lt9611) 1120 return -ENOMEM; 1121 1122 lt9611->dev = &client->dev; 1123 lt9611->client = client; 1124 lt9611->sleep = false; 1125 1126 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1127 if (IS_ERR(lt9611->regmap)) { 1128 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1129 return PTR_ERR(lt9611->regmap); 1130 } 1131 1132 ret = lt9611_parse_dt(&client->dev, lt9611); 1133 if (ret) { 1134 dev_err(dev, "failed to parse device tree\n"); 1135 return ret; 1136 } 1137 1138 ret = lt9611_gpio_init(lt9611); 1139 if (ret < 0) 1140 goto err_of_put; 1141 1142 ret = lt9611_regulator_init(lt9611); 1143 if (ret < 0) 1144 goto err_of_put; 1145 1146 lt9611_assert_5v(lt9611); 1147 1148 ret = lt9611_regulator_enable(lt9611); 1149 if (ret) 1150 goto err_of_put; 1151 1152 lt9611_reset(lt9611); 1153 1154 ret = lt9611_read_device_rev(lt9611); 1155 if (ret) { 1156 dev_err(dev, "failed to read chip rev\n"); 1157 goto err_disable_regulators; 1158 } 1159 1160 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1161 lt9611_irq_thread_handler, 1162 IRQF_ONESHOT, "lt9611", lt9611); 1163 if (ret) { 1164 dev_err(dev, "failed to request irq\n"); 1165 goto err_disable_regulators; 1166 } 1167 1168 i2c_set_clientdata(client, lt9611); 1169 1170 lt9611->bridge.funcs = <9611_bridge_funcs; 1171 lt9611->bridge.of_node = client->dev.of_node; 1172 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1173 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1174 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1175 1176 drm_bridge_add(<9611->bridge); 1177 1178 lt9611_enable_hpd_interrupts(lt9611); 1179 1180 return lt9611_audio_init(dev, lt9611); 1181 1182 err_disable_regulators: 1183 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1184 1185 err_of_put: 1186 of_node_put(lt9611->dsi1_node); 1187 of_node_put(lt9611->dsi0_node); 1188 1189 return ret; 1190 } 1191 1192 static int lt9611_remove(struct i2c_client *client) 1193 { 1194 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1195 1196 disable_irq(client->irq); 1197 lt9611_audio_exit(lt9611); 1198 drm_bridge_remove(<9611->bridge); 1199 1200 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1201 1202 of_node_put(lt9611->dsi1_node); 1203 of_node_put(lt9611->dsi0_node); 1204 1205 return 0; 1206 } 1207 1208 static struct i2c_device_id lt9611_id[] = { 1209 { "lontium,lt9611", 0 }, 1210 {} 1211 }; 1212 1213 static const struct of_device_id lt9611_match_table[] = { 1214 { .compatible = "lontium,lt9611" }, 1215 { } 1216 }; 1217 MODULE_DEVICE_TABLE(of, lt9611_match_table); 1218 1219 static struct i2c_driver lt9611_driver = { 1220 .driver = { 1221 .name = "lt9611", 1222 .of_match_table = lt9611_match_table, 1223 }, 1224 .probe = lt9611_probe, 1225 .remove = lt9611_remove, 1226 .id_table = lt9611_id, 1227 }; 1228 module_i2c_driver(lt9611_driver); 1229 1230 MODULE_LICENSE("GPL v2"); 1231