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(0)); 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 704 lt9611_bridge_atomic_enable(struct drm_bridge *bridge, 705 struct drm_bridge_state *old_bridge_state) 706 { 707 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 708 709 if (lt9611_power_on(lt9611)) { 710 dev_err(lt9611->dev, "power on failed\n"); 711 return; 712 } 713 714 lt9611_mipi_input_analog(lt9611); 715 lt9611_hdmi_tx_digital(lt9611); 716 lt9611_hdmi_tx_phy(lt9611); 717 718 msleep(500); 719 720 lt9611_video_check(lt9611); 721 722 /* Enable HDMI output */ 723 regmap_write(lt9611->regmap, 0x8130, 0xea); 724 } 725 726 static void 727 lt9611_bridge_atomic_disable(struct drm_bridge *bridge, 728 struct drm_bridge_state *old_bridge_state) 729 { 730 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 731 int ret; 732 733 /* Disable HDMI output */ 734 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 735 if (ret) { 736 dev_err(lt9611->dev, "video on failed\n"); 737 return; 738 } 739 740 if (lt9611_power_off(lt9611)) { 741 dev_err(lt9611->dev, "power on failed\n"); 742 return; 743 } 744 } 745 746 static struct 747 drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { 748 .get_modes = lt9611_connector_get_modes, 749 .mode_valid = lt9611_connector_mode_valid, 750 }; 751 752 static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { 753 .fill_modes = drm_helper_probe_single_connector_modes, 754 .detect = lt9611_connector_detect, 755 .destroy = drm_connector_cleanup, 756 .reset = drm_atomic_helper_connector_reset, 757 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 758 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 759 }; 760 761 static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 762 struct device_node *dsi_node) 763 { 764 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL }; 765 struct mipi_dsi_device *dsi; 766 struct mipi_dsi_host *host; 767 struct device *dev = lt9611->dev; 768 int ret; 769 770 host = of_find_mipi_dsi_host_by_node(dsi_node); 771 if (!host) { 772 dev_err(lt9611->dev, "failed to find dsi host\n"); 773 return ERR_PTR(-EPROBE_DEFER); 774 } 775 776 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 777 if (IS_ERR(dsi)) { 778 dev_err(lt9611->dev, "failed to create dsi device\n"); 779 return dsi; 780 } 781 782 dsi->lanes = 4; 783 dsi->format = MIPI_DSI_FMT_RGB888; 784 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 785 MIPI_DSI_MODE_VIDEO_HSE; 786 787 ret = devm_mipi_dsi_attach(dev, dsi); 788 if (ret < 0) { 789 dev_err(dev, "failed to attach dsi to host\n"); 790 return ERR_PTR(ret); 791 } 792 793 return dsi; 794 } 795 796 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611) 797 { 798 int ret; 799 800 ret = drm_connector_init(bridge->dev, <9611->connector, 801 <9611_bridge_connector_funcs, 802 DRM_MODE_CONNECTOR_HDMIA); 803 if (ret) { 804 DRM_ERROR("Failed to initialize connector with drm\n"); 805 return ret; 806 } 807 808 drm_connector_helper_add(<9611->connector, 809 <9611_bridge_connector_helper_funcs); 810 drm_connector_attach_encoder(<9611->connector, bridge->encoder); 811 812 if (!bridge->encoder) { 813 DRM_ERROR("Parent encoder object not found"); 814 return -ENODEV; 815 } 816 817 return 0; 818 } 819 820 static int lt9611_bridge_attach(struct drm_bridge *bridge, 821 enum drm_bridge_attach_flags flags) 822 { 823 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 824 int ret; 825 826 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 827 ret = lt9611_connector_init(bridge, lt9611); 828 if (ret < 0) 829 return ret; 830 } 831 832 return 0; 833 } 834 835 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 836 const struct drm_display_info *info, 837 const struct drm_display_mode *mode) 838 { 839 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 840 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 841 842 if (!lt9611_mode) 843 return MODE_BAD; 844 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) 845 return MODE_PANEL; 846 else 847 return MODE_OK; 848 } 849 850 static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) 851 { 852 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 853 854 if (!lt9611->sleep) 855 return; 856 857 lt9611_reset(lt9611); 858 regmap_write(lt9611->regmap, 0x80ee, 0x01); 859 860 lt9611->sleep = false; 861 } 862 863 static void 864 lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge, 865 struct drm_bridge_state *old_bridge_state) 866 { 867 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 868 869 lt9611_sleep_setup(lt9611); 870 } 871 872 static void lt9611_bridge_mode_set(struct drm_bridge *bridge, 873 const struct drm_display_mode *mode, 874 const struct drm_display_mode *adj_mode) 875 { 876 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 877 struct hdmi_avi_infoframe avi_frame; 878 int ret; 879 880 lt9611_bridge_pre_enable(bridge); 881 882 lt9611_mipi_input_digital(lt9611, mode); 883 lt9611_pll_setup(lt9611, mode); 884 lt9611_mipi_video_setup(lt9611, mode); 885 lt9611_pcr_setup(lt9611, mode); 886 887 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, 888 <9611->connector, 889 mode); 890 if (!ret) 891 lt9611->vic = avi_frame.video_code; 892 } 893 894 static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 895 { 896 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 897 unsigned int reg_val = 0; 898 int connected; 899 900 regmap_read(lt9611->regmap, 0x825e, ®_val); 901 connected = reg_val & BIT(0); 902 903 lt9611->status = connected ? connector_status_connected : 904 connector_status_disconnected; 905 906 return lt9611->status; 907 } 908 909 static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge, 910 struct drm_connector *connector) 911 { 912 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 913 914 lt9611_power_on(lt9611); 915 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 916 } 917 918 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 919 { 920 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 921 922 lt9611_enable_hpd_interrupts(lt9611); 923 } 924 925 #define MAX_INPUT_SEL_FORMATS 1 926 927 static u32 * 928 lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 929 struct drm_bridge_state *bridge_state, 930 struct drm_crtc_state *crtc_state, 931 struct drm_connector_state *conn_state, 932 u32 output_fmt, 933 unsigned int *num_input_fmts) 934 { 935 u32 *input_fmts; 936 937 *num_input_fmts = 0; 938 939 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 940 GFP_KERNEL); 941 if (!input_fmts) 942 return NULL; 943 944 /* This is the DSI-end bus format */ 945 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 946 *num_input_fmts = 1; 947 948 return input_fmts; 949 } 950 951 static const struct drm_bridge_funcs lt9611_bridge_funcs = { 952 .attach = lt9611_bridge_attach, 953 .mode_valid = lt9611_bridge_mode_valid, 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 .atomic_enable = lt9611_bridge_atomic_enable, 960 .atomic_disable = lt9611_bridge_atomic_disable, 961 .atomic_post_disable = lt9611_bridge_atomic_post_disable, 962 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 963 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 964 .atomic_reset = drm_atomic_helper_bridge_reset, 965 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts, 966 }; 967 968 static int lt9611_parse_dt(struct device *dev, 969 struct lt9611 *lt9611) 970 { 971 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 972 if (!lt9611->dsi0_node) { 973 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 974 return -ENODEV; 975 } 976 977 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 978 979 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 980 981 return 0; 982 } 983 984 static int lt9611_gpio_init(struct lt9611 *lt9611) 985 { 986 struct device *dev = lt9611->dev; 987 988 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 989 if (IS_ERR(lt9611->reset_gpio)) { 990 dev_err(dev, "failed to acquire reset gpio\n"); 991 return PTR_ERR(lt9611->reset_gpio); 992 } 993 994 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 995 GPIOD_OUT_LOW); 996 if (IS_ERR(lt9611->enable_gpio)) { 997 dev_err(dev, "failed to acquire enable gpio\n"); 998 return PTR_ERR(lt9611->enable_gpio); 999 } 1000 1001 return 0; 1002 } 1003 1004 static int lt9611_read_device_rev(struct lt9611 *lt9611) 1005 { 1006 unsigned int rev; 1007 int ret; 1008 1009 regmap_write(lt9611->regmap, 0x80ee, 0x01); 1010 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 1011 if (ret) 1012 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 1013 else 1014 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 1015 1016 return ret; 1017 } 1018 1019 static int lt9611_hdmi_hw_params(struct device *dev, void *data, 1020 struct hdmi_codec_daifmt *fmt, 1021 struct hdmi_codec_params *hparms) 1022 { 1023 struct lt9611 *lt9611 = data; 1024 1025 if (hparms->sample_rate == 48000) 1026 regmap_write(lt9611->regmap, 0x840f, 0x2b); 1027 else if (hparms->sample_rate == 96000) 1028 regmap_write(lt9611->regmap, 0x840f, 0xab); 1029 else 1030 return -EINVAL; 1031 1032 regmap_write(lt9611->regmap, 0x8435, 0x00); 1033 regmap_write(lt9611->regmap, 0x8436, 0x18); 1034 regmap_write(lt9611->regmap, 0x8437, 0x00); 1035 1036 return 0; 1037 } 1038 1039 static int lt9611_audio_startup(struct device *dev, void *data) 1040 { 1041 struct lt9611 *lt9611 = data; 1042 1043 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 1044 regmap_write(lt9611->regmap, 0x82d7, 0x04); 1045 1046 regmap_write(lt9611->regmap, 0x8406, 0x08); 1047 regmap_write(lt9611->regmap, 0x8407, 0x10); 1048 1049 regmap_write(lt9611->regmap, 0x8434, 0xd5); 1050 1051 return 0; 1052 } 1053 1054 static void lt9611_audio_shutdown(struct device *dev, void *data) 1055 { 1056 struct lt9611 *lt9611 = data; 1057 1058 regmap_write(lt9611->regmap, 0x8406, 0x00); 1059 regmap_write(lt9611->regmap, 0x8407, 0x00); 1060 } 1061 1062 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1063 struct device_node *endpoint) 1064 { 1065 struct of_endpoint of_ep; 1066 int ret; 1067 1068 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1069 if (ret < 0) 1070 return ret; 1071 1072 /* 1073 * HDMI sound should be located as reg = <2> 1074 * Then, it is sound port 0 1075 */ 1076 if (of_ep.port == 2) 1077 return 0; 1078 1079 return -EINVAL; 1080 } 1081 1082 static const struct hdmi_codec_ops lt9611_codec_ops = { 1083 .hw_params = lt9611_hdmi_hw_params, 1084 .audio_shutdown = lt9611_audio_shutdown, 1085 .audio_startup = lt9611_audio_startup, 1086 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1087 }; 1088 1089 static struct hdmi_codec_pdata codec_data = { 1090 .ops = <9611_codec_ops, 1091 .max_i2s_channels = 8, 1092 .i2s = 1, 1093 }; 1094 1095 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1096 { 1097 codec_data.data = lt9611; 1098 lt9611->audio_pdev = 1099 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1100 PLATFORM_DEVID_AUTO, 1101 &codec_data, sizeof(codec_data)); 1102 1103 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1104 } 1105 1106 static void lt9611_audio_exit(struct lt9611 *lt9611) 1107 { 1108 if (lt9611->audio_pdev) { 1109 platform_device_unregister(lt9611->audio_pdev); 1110 lt9611->audio_pdev = NULL; 1111 } 1112 } 1113 1114 static int lt9611_probe(struct i2c_client *client, 1115 const struct i2c_device_id *id) 1116 { 1117 struct lt9611 *lt9611; 1118 struct device *dev = &client->dev; 1119 int ret; 1120 1121 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1122 dev_err(dev, "device doesn't support I2C\n"); 1123 return -ENODEV; 1124 } 1125 1126 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1127 if (!lt9611) 1128 return -ENOMEM; 1129 1130 lt9611->dev = dev; 1131 lt9611->client = client; 1132 lt9611->sleep = false; 1133 1134 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1135 if (IS_ERR(lt9611->regmap)) { 1136 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1137 return PTR_ERR(lt9611->regmap); 1138 } 1139 1140 ret = lt9611_parse_dt(dev, lt9611); 1141 if (ret) { 1142 dev_err(dev, "failed to parse device tree\n"); 1143 return ret; 1144 } 1145 1146 ret = lt9611_gpio_init(lt9611); 1147 if (ret < 0) 1148 goto err_of_put; 1149 1150 ret = lt9611_regulator_init(lt9611); 1151 if (ret < 0) 1152 goto err_of_put; 1153 1154 lt9611_assert_5v(lt9611); 1155 1156 ret = lt9611_regulator_enable(lt9611); 1157 if (ret) 1158 goto err_of_put; 1159 1160 lt9611_reset(lt9611); 1161 1162 ret = lt9611_read_device_rev(lt9611); 1163 if (ret) { 1164 dev_err(dev, "failed to read chip rev\n"); 1165 goto err_disable_regulators; 1166 } 1167 1168 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1169 lt9611_irq_thread_handler, 1170 IRQF_ONESHOT, "lt9611", lt9611); 1171 if (ret) { 1172 dev_err(dev, "failed to request irq\n"); 1173 goto err_disable_regulators; 1174 } 1175 1176 i2c_set_clientdata(client, lt9611); 1177 1178 lt9611->bridge.funcs = <9611_bridge_funcs; 1179 lt9611->bridge.of_node = client->dev.of_node; 1180 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1181 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1182 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1183 1184 drm_bridge_add(<9611->bridge); 1185 1186 /* Attach primary DSI */ 1187 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 1188 if (IS_ERR(lt9611->dsi0)) { 1189 ret = PTR_ERR(lt9611->dsi0); 1190 goto err_remove_bridge; 1191 } 1192 1193 /* Attach secondary DSI, if specified */ 1194 if (lt9611->dsi1_node) { 1195 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 1196 if (IS_ERR(lt9611->dsi1)) { 1197 ret = PTR_ERR(lt9611->dsi1); 1198 goto err_remove_bridge; 1199 } 1200 } 1201 1202 lt9611_enable_hpd_interrupts(lt9611); 1203 1204 ret = lt9611_audio_init(dev, lt9611); 1205 if (ret) 1206 goto err_remove_bridge; 1207 1208 return 0; 1209 1210 err_remove_bridge: 1211 drm_bridge_remove(<9611->bridge); 1212 1213 err_disable_regulators: 1214 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1215 1216 err_of_put: 1217 of_node_put(lt9611->dsi1_node); 1218 of_node_put(lt9611->dsi0_node); 1219 1220 return ret; 1221 } 1222 1223 static int lt9611_remove(struct i2c_client *client) 1224 { 1225 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1226 1227 disable_irq(client->irq); 1228 lt9611_audio_exit(lt9611); 1229 drm_bridge_remove(<9611->bridge); 1230 1231 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1232 1233 of_node_put(lt9611->dsi1_node); 1234 of_node_put(lt9611->dsi0_node); 1235 1236 return 0; 1237 } 1238 1239 static struct i2c_device_id lt9611_id[] = { 1240 { "lontium,lt9611", 0 }, 1241 {} 1242 }; 1243 MODULE_DEVICE_TABLE(i2c, lt9611_id); 1244 1245 static const struct of_device_id lt9611_match_table[] = { 1246 { .compatible = "lontium,lt9611" }, 1247 { } 1248 }; 1249 MODULE_DEVICE_TABLE(of, lt9611_match_table); 1250 1251 static struct i2c_driver lt9611_driver = { 1252 .driver = { 1253 .name = "lt9611", 1254 .of_match_table = lt9611_match_table, 1255 }, 1256 .probe = lt9611_probe, 1257 .remove = lt9611_remove, 1258 .id_table = lt9611_id, 1259 }; 1260 module_i2c_driver(lt9611_driver); 1261 1262 MODULE_LICENSE("GPL v2"); 1263