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/i2c.h> 9 #include <linux/interrupt.h> 10 #include <linux/media-bus-format.h> 11 #include <linux/module.h> 12 #include <linux/of_graph.h> 13 #include <linux/platform_device.h> 14 #include <linux/regmap.h> 15 #include <linux/regulator/consumer.h> 16 17 #include <sound/hdmi-codec.h> 18 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_bridge.h> 21 #include <drm/drm_mipi_dsi.h> 22 #include <drm/drm_print.h> 23 #include <drm/drm_probe_helper.h> 24 25 #define EDID_SEG_SIZE 256 26 #define EDID_LEN 32 27 #define EDID_LOOP 8 28 #define KEY_DDC_ACCS_DONE 0x02 29 #define DDC_NO_ACK 0x50 30 31 #define LT9611_4LANES 0 32 33 struct lt9611 { 34 struct device *dev; 35 struct drm_bridge bridge; 36 struct drm_connector connector; 37 38 struct regmap *regmap; 39 40 struct device_node *dsi0_node; 41 struct device_node *dsi1_node; 42 struct mipi_dsi_device *dsi0; 43 struct mipi_dsi_device *dsi1; 44 struct platform_device *audio_pdev; 45 46 bool ac_mode; 47 48 struct gpio_desc *reset_gpio; 49 struct gpio_desc *enable_gpio; 50 51 bool power_on; 52 bool sleep; 53 54 struct regulator_bulk_data supplies[2]; 55 56 struct i2c_client *client; 57 58 enum drm_connector_status status; 59 60 u8 edid_buf[EDID_SEG_SIZE]; 61 u32 vic; 62 }; 63 64 #define LT9611_PAGE_CONTROL 0xff 65 66 static const struct regmap_range_cfg lt9611_ranges[] = { 67 { 68 .name = "register_range", 69 .range_min = 0, 70 .range_max = 0x85ff, 71 .selector_reg = LT9611_PAGE_CONTROL, 72 .selector_mask = 0xff, 73 .selector_shift = 0, 74 .window_start = 0, 75 .window_len = 0x100, 76 }, 77 }; 78 79 static const struct regmap_config lt9611_regmap_config = { 80 .reg_bits = 8, 81 .val_bits = 8, 82 .max_register = 0xffff, 83 .ranges = lt9611_ranges, 84 .num_ranges = ARRAY_SIZE(lt9611_ranges), 85 }; 86 87 struct lt9611_mode { 88 u16 hdisplay; 89 u16 vdisplay; 90 u8 vrefresh; 91 u8 lanes; 92 u8 intfs; 93 }; 94 95 static struct lt9611_mode lt9611_modes[] = { 96 { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */ 97 { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */ 98 { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */ 99 { 1920, 1080, 24, 3, 1 }, 100 { 720, 480, 60, 4, 1 }, 101 { 720, 576, 50, 2, 1 }, 102 { 640, 480, 60, 2, 1 }, 103 }; 104 105 static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) 106 { 107 return container_of(bridge, struct lt9611, bridge); 108 } 109 110 static struct lt9611 *connector_to_lt9611(struct drm_connector *connector) 111 { 112 return container_of(connector, struct lt9611, connector); 113 } 114 115 static int lt9611_mipi_input_analog(struct lt9611 *lt9611) 116 { 117 const struct reg_sequence reg_cfg[] = { 118 { 0x8106, 0x40 }, /* port A rx current */ 119 { 0x810a, 0xfe }, /* port A ldo voltage set */ 120 { 0x810b, 0xbf }, /* enable port A lprx */ 121 { 0x8111, 0x40 }, /* port B rx current */ 122 { 0x8115, 0xfe }, /* port B ldo voltage set */ 123 { 0x8116, 0xbf }, /* enable port B lprx */ 124 125 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */ 126 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */ 127 }; 128 129 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 130 } 131 132 static int lt9611_mipi_input_digital(struct lt9611 *lt9611, 133 const struct drm_display_mode *mode) 134 { 135 struct reg_sequence reg_cfg[] = { 136 { 0x8300, LT9611_4LANES }, 137 { 0x830a, 0x00 }, 138 { 0x824f, 0x80 }, 139 { 0x8250, 0x10 }, 140 { 0x8302, 0x0a }, 141 { 0x8306, 0x0a }, 142 }; 143 144 if (mode->hdisplay == 3840) 145 reg_cfg[1].def = 0x03; 146 147 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 148 } 149 150 static void lt9611_mipi_video_setup(struct lt9611 *lt9611, 151 const struct drm_display_mode *mode) 152 { 153 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch; 154 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch; 155 156 h_total = mode->htotal; 157 v_total = mode->vtotal; 158 159 hactive = mode->hdisplay; 160 hsync_len = mode->hsync_end - mode->hsync_start; 161 hfront_porch = mode->hsync_start - mode->hdisplay; 162 hsync_porch = hsync_len + mode->htotal - mode->hsync_end; 163 164 vactive = mode->vdisplay; 165 vsync_len = mode->vsync_end - mode->vsync_start; 166 vfront_porch = mode->vsync_start - mode->vdisplay; 167 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end; 168 169 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256)); 170 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256)); 171 172 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256)); 173 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256)); 174 175 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256)); 176 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256)); 177 178 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256)); 179 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256)); 180 181 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256)); 182 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256)); 183 184 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256)); 185 186 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256)); 187 188 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256)); 189 190 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256)); 191 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256)); 192 } 193 194 static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode) 195 { 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 { 0x831d, 0x10 }, 211 212 /* MK limit */ 213 { 0x832d, 0x38 }, 214 { 0x8331, 0x08 }, 215 }; 216 const struct reg_sequence reg_cfg2[] = { 217 { 0x830b, 0x03 }, 218 { 0x830c, 0xd0 }, 219 { 0x8348, 0x03 }, 220 { 0x8349, 0xe0 }, 221 { 0x8324, 0x72 }, 222 { 0x8325, 0x00 }, 223 { 0x832a, 0x01 }, 224 { 0x834a, 0x10 }, 225 { 0x831d, 0x10 }, 226 { 0x8326, 0x37 }, 227 }; 228 229 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 230 231 switch (mode->hdisplay) { 232 case 640: 233 regmap_write(lt9611->regmap, 0x8326, 0x14); 234 break; 235 case 1920: 236 regmap_write(lt9611->regmap, 0x8326, 0x37); 237 break; 238 case 3840: 239 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2)); 240 break; 241 } 242 243 /* pcr rst */ 244 regmap_write(lt9611->regmap, 0x8011, 0x5a); 245 regmap_write(lt9611->regmap, 0x8011, 0xfa); 246 } 247 248 static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode) 249 { 250 unsigned int pclk = mode->clock; 251 const struct reg_sequence reg_cfg[] = { 252 /* txpll init */ 253 { 0x8123, 0x40 }, 254 { 0x8124, 0x64 }, 255 { 0x8125, 0x80 }, 256 { 0x8126, 0x55 }, 257 { 0x812c, 0x37 }, 258 { 0x812f, 0x01 }, 259 { 0x8126, 0x55 }, 260 { 0x8127, 0x66 }, 261 { 0x8128, 0x88 }, 262 }; 263 264 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 265 266 if (pclk > 150000) 267 regmap_write(lt9611->regmap, 0x812d, 0x88); 268 else if (pclk > 70000) 269 regmap_write(lt9611->regmap, 0x812d, 0x99); 270 else 271 regmap_write(lt9611->regmap, 0x812d, 0xaa); 272 273 /* 274 * first divide pclk by 2 first 275 * - write divide by 64k to 19:16 bits which means shift by 17 276 * - write divide by 256 to 15:8 bits which means shift by 9 277 * - write remainder to 7:0 bits, which means shift by 1 278 */ 279 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ 280 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ 281 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ 282 283 regmap_write(lt9611->regmap, 0x82de, 0x20); 284 regmap_write(lt9611->regmap, 0x82de, 0xe0); 285 286 regmap_write(lt9611->regmap, 0x8016, 0xf1); 287 regmap_write(lt9611->regmap, 0x8016, 0xf3); 288 289 return 0; 290 } 291 292 static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg) 293 { 294 unsigned int temp, temp2; 295 int ret; 296 297 ret = regmap_read(lt9611->regmap, reg, &temp); 298 if (ret) 299 return ret; 300 temp <<= 8; 301 ret = regmap_read(lt9611->regmap, reg + 1, &temp2); 302 if (ret) 303 return ret; 304 305 return (temp + temp2); 306 } 307 308 static int lt9611_video_check(struct lt9611 *lt9611) 309 { 310 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk; 311 int temp; 312 313 /* top module video check */ 314 315 /* vactive */ 316 temp = lt9611_read_video_check(lt9611, 0x8282); 317 if (temp < 0) 318 goto end; 319 vactive = temp; 320 321 /* v_total */ 322 temp = lt9611_read_video_check(lt9611, 0x826c); 323 if (temp < 0) 324 goto end; 325 v_total = temp; 326 327 /* h_total_sysclk */ 328 temp = lt9611_read_video_check(lt9611, 0x8286); 329 if (temp < 0) 330 goto end; 331 h_total_sysclk = temp; 332 333 /* hactive_a */ 334 temp = lt9611_read_video_check(lt9611, 0x8382); 335 if (temp < 0) 336 goto end; 337 hactive_a = temp / 3; 338 339 /* hactive_b */ 340 temp = lt9611_read_video_check(lt9611, 0x8386); 341 if (temp < 0) 342 goto end; 343 hactive_b = temp / 3; 344 345 dev_info(lt9611->dev, 346 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n", 347 hactive_a, hactive_b, vactive, v_total, h_total_sysclk); 348 349 return 0; 350 351 end: 352 dev_err(lt9611->dev, "read video check error\n"); 353 return temp; 354 } 355 356 static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611) 357 { 358 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic); 359 regmap_write(lt9611->regmap, 0x8447, lt9611->vic); 360 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */ 361 362 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 363 regmap_write(lt9611->regmap, 0x82d7, 0x04); 364 } 365 366 static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) 367 { 368 struct reg_sequence reg_cfg[] = { 369 { 0x8130, 0x6a }, 370 { 0x8131, 0x44 }, /* HDMI DC mode */ 371 { 0x8132, 0x4a }, 372 { 0x8133, 0x0b }, 373 { 0x8134, 0x00 }, 374 { 0x8135, 0x00 }, 375 { 0x8136, 0x00 }, 376 { 0x8137, 0x44 }, 377 { 0x813f, 0x0f }, 378 { 0x8140, 0xa0 }, 379 { 0x8141, 0xa0 }, 380 { 0x8142, 0xa0 }, 381 { 0x8143, 0xa0 }, 382 { 0x8144, 0x0a }, 383 }; 384 385 /* HDMI AC mode */ 386 if (lt9611->ac_mode) 387 reg_cfg[2].def = 0x73; 388 389 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 390 } 391 392 static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) 393 { 394 struct lt9611 *lt9611 = dev_id; 395 unsigned int irq_flag0 = 0; 396 unsigned int irq_flag3 = 0; 397 398 regmap_read(lt9611->regmap, 0x820f, &irq_flag3); 399 regmap_read(lt9611->regmap, 0x820c, &irq_flag0); 400 401 /* hpd changed low */ 402 if (irq_flag3 & 0x80) { 403 dev_info(lt9611->dev, "hdmi cable disconnected\n"); 404 405 regmap_write(lt9611->regmap, 0x8207, 0xbf); 406 regmap_write(lt9611->regmap, 0x8207, 0x3f); 407 } 408 409 /* hpd changed high */ 410 if (irq_flag3 & 0x40) { 411 dev_info(lt9611->dev, "hdmi cable connected\n"); 412 413 regmap_write(lt9611->regmap, 0x8207, 0x7f); 414 regmap_write(lt9611->regmap, 0x8207, 0x3f); 415 } 416 417 if (irq_flag3 & 0xc0 && lt9611->bridge.dev) 418 drm_kms_helper_hotplug_event(lt9611->bridge.dev); 419 420 /* video input changed */ 421 if (irq_flag0 & 0x01) { 422 dev_info(lt9611->dev, "video input changed\n"); 423 regmap_write(lt9611->regmap, 0x829e, 0xff); 424 regmap_write(lt9611->regmap, 0x829e, 0xf7); 425 regmap_write(lt9611->regmap, 0x8204, 0xff); 426 regmap_write(lt9611->regmap, 0x8204, 0xfe); 427 } 428 429 return IRQ_HANDLED; 430 } 431 432 static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) 433 { 434 unsigned int val; 435 436 regmap_read(lt9611->regmap, 0x8203, &val); 437 438 val &= ~0xc0; 439 regmap_write(lt9611->regmap, 0x8203, val); 440 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */ 441 regmap_write(lt9611->regmap, 0x8207, 0x3f); 442 } 443 444 static void lt9611_sleep_setup(struct lt9611 *lt9611) 445 { 446 const struct reg_sequence sleep_setup[] = { 447 { 0x8024, 0x76 }, 448 { 0x8023, 0x01 }, 449 { 0x8157, 0x03 }, /* set addr pin as output */ 450 { 0x8149, 0x0b }, 451 { 0x8151, 0x30 }, /* disable IRQ */ 452 { 0x8102, 0x48 }, /* MIPI Rx power down */ 453 { 0x8123, 0x80 }, 454 { 0x8130, 0x00 }, 455 { 0x8100, 0x01 }, /* bandgap power down */ 456 { 0x8101, 0x00 }, /* system clk power down */ 457 }; 458 459 regmap_multi_reg_write(lt9611->regmap, 460 sleep_setup, ARRAY_SIZE(sleep_setup)); 461 lt9611->sleep = true; 462 } 463 464 static int lt9611_power_on(struct lt9611 *lt9611) 465 { 466 int ret; 467 const struct reg_sequence seq[] = { 468 /* LT9611_System_Init */ 469 { 0x8101, 0x18 }, /* sel xtal clock */ 470 471 /* timer for frequency meter */ 472 { 0x821b, 0x69 }, /* timer 2 */ 473 { 0x821c, 0x78 }, 474 { 0x82cb, 0x69 }, /* timer 1 */ 475 { 0x82cc, 0x78 }, 476 477 /* irq init */ 478 { 0x8251, 0x01 }, 479 { 0x8258, 0x0a }, /* hpd irq */ 480 { 0x8259, 0x80 }, /* hpd debounce width */ 481 { 0x829e, 0xf7 }, /* video check irq */ 482 483 /* power consumption for work */ 484 { 0x8004, 0xf0 }, 485 { 0x8006, 0xf0 }, 486 { 0x800a, 0x80 }, 487 { 0x800b, 0x40 }, 488 { 0x800d, 0xef }, 489 { 0x8011, 0xfa }, 490 }; 491 492 if (lt9611->power_on) 493 return 0; 494 495 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); 496 if (!ret) 497 lt9611->power_on = true; 498 499 return ret; 500 } 501 502 static int lt9611_power_off(struct lt9611 *lt9611) 503 { 504 int ret; 505 506 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 507 if (!ret) 508 lt9611->power_on = false; 509 510 return ret; 511 } 512 513 static void lt9611_reset(struct lt9611 *lt9611) 514 { 515 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 516 msleep(20); 517 518 gpiod_set_value_cansleep(lt9611->reset_gpio, 0); 519 msleep(20); 520 521 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 522 msleep(100); 523 } 524 525 static void lt9611_assert_5v(struct lt9611 *lt9611) 526 { 527 if (!lt9611->enable_gpio) 528 return; 529 530 gpiod_set_value_cansleep(lt9611->enable_gpio, 1); 531 msleep(20); 532 } 533 534 static int lt9611_regulator_init(struct lt9611 *lt9611) 535 { 536 int ret; 537 538 lt9611->supplies[0].supply = "vdd"; 539 lt9611->supplies[1].supply = "vcc"; 540 541 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); 542 if (ret < 0) 543 return ret; 544 545 return regulator_set_load(lt9611->supplies[0].consumer, 300000); 546 } 547 548 static int lt9611_regulator_enable(struct lt9611 *lt9611) 549 { 550 int ret; 551 552 ret = regulator_enable(lt9611->supplies[0].consumer); 553 if (ret < 0) 554 return ret; 555 556 usleep_range(1000, 10000); 557 558 ret = regulator_enable(lt9611->supplies[1].consumer); 559 if (ret < 0) { 560 regulator_disable(lt9611->supplies[0].consumer); 561 return ret; 562 } 563 564 return 0; 565 } 566 567 static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode) 568 { 569 int i; 570 571 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) { 572 if (lt9611_modes[i].hdisplay == mode->hdisplay && 573 lt9611_modes[i].vdisplay == mode->vdisplay && 574 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 575 return <9611_modes[i]; 576 } 577 } 578 579 return NULL; 580 } 581 582 /* connector funcs */ 583 static enum drm_connector_status __lt9611_detect(struct lt9611 *lt9611) 584 { 585 unsigned int reg_val = 0; 586 int connected = 0; 587 588 regmap_read(lt9611->regmap, 0x825e, ®_val); 589 connected = (reg_val & (BIT(2) | BIT(0))); 590 591 lt9611->status = connected ? connector_status_connected : 592 connector_status_disconnected; 593 594 return lt9611->status; 595 } 596 597 static enum drm_connector_status 598 lt9611_connector_detect(struct drm_connector *connector, bool force) 599 { 600 return __lt9611_detect(connector_to_lt9611(connector)); 601 } 602 603 static int lt9611_read_edid(struct lt9611 *lt9611) 604 { 605 unsigned int temp; 606 int ret = 0; 607 int i, j; 608 609 /* memset to clear old buffer, if any */ 610 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf)); 611 612 regmap_write(lt9611->regmap, 0x8503, 0xc9); 613 614 /* 0xA0 is EDID device address */ 615 regmap_write(lt9611->regmap, 0x8504, 0xa0); 616 /* 0x00 is EDID offset address */ 617 regmap_write(lt9611->regmap, 0x8505, 0x00); 618 619 /* length for read */ 620 regmap_write(lt9611->regmap, 0x8506, EDID_LEN); 621 regmap_write(lt9611->regmap, 0x8514, 0x7f); 622 623 for (i = 0; i < EDID_LOOP; i++) { 624 /* offset address */ 625 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN); 626 regmap_write(lt9611->regmap, 0x8507, 0x36); 627 regmap_write(lt9611->regmap, 0x8507, 0x31); 628 regmap_write(lt9611->regmap, 0x8507, 0x37); 629 usleep_range(5000, 10000); 630 631 regmap_read(lt9611->regmap, 0x8540, &temp); 632 633 if (temp & KEY_DDC_ACCS_DONE) { 634 for (j = 0; j < EDID_LEN; j++) { 635 regmap_read(lt9611->regmap, 0x8583, &temp); 636 lt9611->edid_buf[i * EDID_LEN + j] = temp; 637 } 638 639 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */ 640 dev_err(lt9611->dev, "read edid failed: no ack\n"); 641 ret = -EIO; 642 goto end; 643 644 } else { 645 dev_err(lt9611->dev, "read edid failed: access not done\n"); 646 ret = -EIO; 647 goto end; 648 } 649 } 650 651 end: 652 regmap_write(lt9611->regmap, 0x8507, 0x1f); 653 return ret; 654 } 655 656 static int 657 lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 658 { 659 struct lt9611 *lt9611 = data; 660 int ret; 661 662 if (len > 128) 663 return -EINVAL; 664 665 /* supports up to 1 extension block */ 666 /* TODO: add support for more extension blocks */ 667 if (block > 1) 668 return -EINVAL; 669 670 if (block == 0) { 671 ret = lt9611_read_edid(lt9611); 672 if (ret) { 673 dev_err(lt9611->dev, "edid read failed\n"); 674 return ret; 675 } 676 } 677 678 block %= 2; 679 memcpy(buf, lt9611->edid_buf + (block * 128), len); 680 681 return 0; 682 } 683 684 static int lt9611_connector_get_modes(struct drm_connector *connector) 685 { 686 struct lt9611 *lt9611 = connector_to_lt9611(connector); 687 unsigned int count; 688 struct edid *edid; 689 690 lt9611_power_on(lt9611); 691 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 692 drm_connector_update_edid_property(connector, edid); 693 count = drm_add_edid_modes(connector, edid); 694 kfree(edid); 695 696 return count; 697 } 698 699 static enum drm_mode_status 700 lt9611_connector_mode_valid(struct drm_connector *connector, 701 struct drm_display_mode *mode) 702 { 703 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 704 705 return lt9611_mode ? MODE_OK : MODE_BAD; 706 } 707 708 /* bridge funcs */ 709 static void 710 lt9611_bridge_atomic_enable(struct drm_bridge *bridge, 711 struct drm_bridge_state *old_bridge_state) 712 { 713 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 714 715 if (lt9611_power_on(lt9611)) { 716 dev_err(lt9611->dev, "power on failed\n"); 717 return; 718 } 719 720 lt9611_mipi_input_analog(lt9611); 721 lt9611_hdmi_tx_digital(lt9611); 722 lt9611_hdmi_tx_phy(lt9611); 723 724 msleep(500); 725 726 lt9611_video_check(lt9611); 727 728 /* Enable HDMI output */ 729 regmap_write(lt9611->regmap, 0x8130, 0xea); 730 } 731 732 static void 733 lt9611_bridge_atomic_disable(struct drm_bridge *bridge, 734 struct drm_bridge_state *old_bridge_state) 735 { 736 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 737 int ret; 738 739 /* Disable HDMI output */ 740 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 741 if (ret) { 742 dev_err(lt9611->dev, "video on failed\n"); 743 return; 744 } 745 746 if (lt9611_power_off(lt9611)) { 747 dev_err(lt9611->dev, "power on failed\n"); 748 return; 749 } 750 } 751 752 static struct 753 drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { 754 .get_modes = lt9611_connector_get_modes, 755 .mode_valid = lt9611_connector_mode_valid, 756 }; 757 758 static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { 759 .fill_modes = drm_helper_probe_single_connector_modes, 760 .detect = lt9611_connector_detect, 761 .destroy = drm_connector_cleanup, 762 .reset = drm_atomic_helper_connector_reset, 763 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 764 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 765 }; 766 767 static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 768 struct device_node *dsi_node) 769 { 770 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL }; 771 struct mipi_dsi_device *dsi; 772 struct mipi_dsi_host *host; 773 struct device *dev = lt9611->dev; 774 int ret; 775 776 host = of_find_mipi_dsi_host_by_node(dsi_node); 777 if (!host) { 778 dev_err(lt9611->dev, "failed to find dsi host\n"); 779 return ERR_PTR(-EPROBE_DEFER); 780 } 781 782 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 783 if (IS_ERR(dsi)) { 784 dev_err(lt9611->dev, "failed to create dsi device\n"); 785 return dsi; 786 } 787 788 dsi->lanes = 4; 789 dsi->format = MIPI_DSI_FMT_RGB888; 790 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 791 MIPI_DSI_MODE_VIDEO_HSE; 792 793 ret = devm_mipi_dsi_attach(dev, dsi); 794 if (ret < 0) { 795 dev_err(dev, "failed to attach dsi to host\n"); 796 return ERR_PTR(ret); 797 } 798 799 return dsi; 800 } 801 802 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611) 803 { 804 int ret; 805 806 ret = drm_connector_init(bridge->dev, <9611->connector, 807 <9611_bridge_connector_funcs, 808 DRM_MODE_CONNECTOR_HDMIA); 809 if (ret) { 810 DRM_ERROR("Failed to initialize connector with drm\n"); 811 return ret; 812 } 813 814 drm_connector_helper_add(<9611->connector, 815 <9611_bridge_connector_helper_funcs); 816 817 if (!bridge->encoder) { 818 DRM_ERROR("Parent encoder object not found"); 819 return -ENODEV; 820 } 821 822 drm_connector_attach_encoder(<9611->connector, bridge->encoder); 823 824 return 0; 825 } 826 827 static int lt9611_bridge_attach(struct drm_bridge *bridge, 828 enum drm_bridge_attach_flags flags) 829 { 830 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 831 int ret; 832 833 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 834 ret = lt9611_connector_init(bridge, lt9611); 835 if (ret < 0) 836 return ret; 837 } 838 839 return 0; 840 } 841 842 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 843 const struct drm_display_info *info, 844 const struct drm_display_mode *mode) 845 { 846 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 847 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 848 849 if (!lt9611_mode) 850 return MODE_BAD; 851 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) 852 return MODE_PANEL; 853 else 854 return MODE_OK; 855 } 856 857 static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) 858 { 859 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 860 861 if (!lt9611->sleep) 862 return; 863 864 lt9611_reset(lt9611); 865 regmap_write(lt9611->regmap, 0x80ee, 0x01); 866 867 lt9611->sleep = false; 868 } 869 870 static void 871 lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge, 872 struct drm_bridge_state *old_bridge_state) 873 { 874 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 875 876 lt9611_sleep_setup(lt9611); 877 } 878 879 static void lt9611_bridge_mode_set(struct drm_bridge *bridge, 880 const struct drm_display_mode *mode, 881 const struct drm_display_mode *adj_mode) 882 { 883 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 884 struct hdmi_avi_infoframe avi_frame; 885 int ret; 886 887 lt9611_bridge_pre_enable(bridge); 888 889 lt9611_mipi_input_digital(lt9611, mode); 890 lt9611_pll_setup(lt9611, mode); 891 lt9611_mipi_video_setup(lt9611, mode); 892 lt9611_pcr_setup(lt9611, mode); 893 894 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, 895 <9611->connector, 896 mode); 897 if (!ret) 898 lt9611->vic = avi_frame.video_code; 899 } 900 901 static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 902 { 903 return __lt9611_detect(bridge_to_lt9611(bridge)); 904 } 905 906 static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge, 907 struct drm_connector *connector) 908 { 909 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 910 911 lt9611_power_on(lt9611); 912 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 913 } 914 915 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 916 { 917 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 918 919 lt9611_enable_hpd_interrupts(lt9611); 920 } 921 922 #define MAX_INPUT_SEL_FORMATS 1 923 924 static u32 * 925 lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 926 struct drm_bridge_state *bridge_state, 927 struct drm_crtc_state *crtc_state, 928 struct drm_connector_state *conn_state, 929 u32 output_fmt, 930 unsigned int *num_input_fmts) 931 { 932 u32 *input_fmts; 933 934 *num_input_fmts = 0; 935 936 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 937 GFP_KERNEL); 938 if (!input_fmts) 939 return NULL; 940 941 /* This is the DSI-end bus format */ 942 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 943 *num_input_fmts = 1; 944 945 return input_fmts; 946 } 947 948 static const struct drm_bridge_funcs lt9611_bridge_funcs = { 949 .attach = lt9611_bridge_attach, 950 .mode_valid = lt9611_bridge_mode_valid, 951 .mode_set = lt9611_bridge_mode_set, 952 .detect = lt9611_bridge_detect, 953 .get_edid = lt9611_bridge_get_edid, 954 .hpd_enable = lt9611_bridge_hpd_enable, 955 956 .atomic_enable = lt9611_bridge_atomic_enable, 957 .atomic_disable = lt9611_bridge_atomic_disable, 958 .atomic_post_disable = lt9611_bridge_atomic_post_disable, 959 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 960 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 961 .atomic_reset = drm_atomic_helper_bridge_reset, 962 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts, 963 }; 964 965 static int lt9611_parse_dt(struct device *dev, 966 struct lt9611 *lt9611) 967 { 968 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 969 if (!lt9611->dsi0_node) { 970 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 971 return -ENODEV; 972 } 973 974 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 975 976 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 977 978 return 0; 979 } 980 981 static int lt9611_gpio_init(struct lt9611 *lt9611) 982 { 983 struct device *dev = lt9611->dev; 984 985 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 986 if (IS_ERR(lt9611->reset_gpio)) { 987 dev_err(dev, "failed to acquire reset gpio\n"); 988 return PTR_ERR(lt9611->reset_gpio); 989 } 990 991 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 992 GPIOD_OUT_LOW); 993 if (IS_ERR(lt9611->enable_gpio)) { 994 dev_err(dev, "failed to acquire enable gpio\n"); 995 return PTR_ERR(lt9611->enable_gpio); 996 } 997 998 return 0; 999 } 1000 1001 static int lt9611_read_device_rev(struct lt9611 *lt9611) 1002 { 1003 unsigned int rev; 1004 int ret; 1005 1006 regmap_write(lt9611->regmap, 0x80ee, 0x01); 1007 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 1008 if (ret) 1009 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 1010 else 1011 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 1012 1013 return ret; 1014 } 1015 1016 static int lt9611_hdmi_hw_params(struct device *dev, void *data, 1017 struct hdmi_codec_daifmt *fmt, 1018 struct hdmi_codec_params *hparms) 1019 { 1020 struct lt9611 *lt9611 = data; 1021 1022 if (hparms->sample_rate == 48000) 1023 regmap_write(lt9611->regmap, 0x840f, 0x2b); 1024 else if (hparms->sample_rate == 96000) 1025 regmap_write(lt9611->regmap, 0x840f, 0xab); 1026 else 1027 return -EINVAL; 1028 1029 regmap_write(lt9611->regmap, 0x8435, 0x00); 1030 regmap_write(lt9611->regmap, 0x8436, 0x18); 1031 regmap_write(lt9611->regmap, 0x8437, 0x00); 1032 1033 return 0; 1034 } 1035 1036 static int lt9611_audio_startup(struct device *dev, void *data) 1037 { 1038 struct lt9611 *lt9611 = data; 1039 1040 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 1041 regmap_write(lt9611->regmap, 0x82d7, 0x04); 1042 1043 regmap_write(lt9611->regmap, 0x8406, 0x08); 1044 regmap_write(lt9611->regmap, 0x8407, 0x10); 1045 1046 regmap_write(lt9611->regmap, 0x8434, 0xd5); 1047 1048 return 0; 1049 } 1050 1051 static void lt9611_audio_shutdown(struct device *dev, void *data) 1052 { 1053 struct lt9611 *lt9611 = data; 1054 1055 regmap_write(lt9611->regmap, 0x8406, 0x00); 1056 regmap_write(lt9611->regmap, 0x8407, 0x00); 1057 } 1058 1059 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1060 struct device_node *endpoint) 1061 { 1062 struct of_endpoint of_ep; 1063 int ret; 1064 1065 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1066 if (ret < 0) 1067 return ret; 1068 1069 /* 1070 * HDMI sound should be located as reg = <2> 1071 * Then, it is sound port 0 1072 */ 1073 if (of_ep.port == 2) 1074 return 0; 1075 1076 return -EINVAL; 1077 } 1078 1079 static const struct hdmi_codec_ops lt9611_codec_ops = { 1080 .hw_params = lt9611_hdmi_hw_params, 1081 .audio_shutdown = lt9611_audio_shutdown, 1082 .audio_startup = lt9611_audio_startup, 1083 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1084 }; 1085 1086 static struct hdmi_codec_pdata codec_data = { 1087 .ops = <9611_codec_ops, 1088 .max_i2s_channels = 8, 1089 .i2s = 1, 1090 }; 1091 1092 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1093 { 1094 codec_data.data = lt9611; 1095 lt9611->audio_pdev = 1096 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1097 PLATFORM_DEVID_AUTO, 1098 &codec_data, sizeof(codec_data)); 1099 1100 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1101 } 1102 1103 static void lt9611_audio_exit(struct lt9611 *lt9611) 1104 { 1105 if (lt9611->audio_pdev) { 1106 platform_device_unregister(lt9611->audio_pdev); 1107 lt9611->audio_pdev = NULL; 1108 } 1109 } 1110 1111 static int lt9611_probe(struct i2c_client *client, 1112 const struct i2c_device_id *id) 1113 { 1114 struct lt9611 *lt9611; 1115 struct device *dev = &client->dev; 1116 int ret; 1117 1118 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1119 dev_err(dev, "device doesn't support I2C\n"); 1120 return -ENODEV; 1121 } 1122 1123 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1124 if (!lt9611) 1125 return -ENOMEM; 1126 1127 lt9611->dev = dev; 1128 lt9611->client = client; 1129 lt9611->sleep = false; 1130 1131 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1132 if (IS_ERR(lt9611->regmap)) { 1133 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1134 return PTR_ERR(lt9611->regmap); 1135 } 1136 1137 ret = lt9611_parse_dt(dev, lt9611); 1138 if (ret) { 1139 dev_err(dev, "failed to parse device tree\n"); 1140 return ret; 1141 } 1142 1143 ret = lt9611_gpio_init(lt9611); 1144 if (ret < 0) 1145 goto err_of_put; 1146 1147 ret = lt9611_regulator_init(lt9611); 1148 if (ret < 0) 1149 goto err_of_put; 1150 1151 lt9611_assert_5v(lt9611); 1152 1153 ret = lt9611_regulator_enable(lt9611); 1154 if (ret) 1155 goto err_of_put; 1156 1157 lt9611_reset(lt9611); 1158 1159 ret = lt9611_read_device_rev(lt9611); 1160 if (ret) { 1161 dev_err(dev, "failed to read chip rev\n"); 1162 goto err_disable_regulators; 1163 } 1164 1165 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1166 lt9611_irq_thread_handler, 1167 IRQF_ONESHOT, "lt9611", lt9611); 1168 if (ret) { 1169 dev_err(dev, "failed to request irq\n"); 1170 goto err_disable_regulators; 1171 } 1172 1173 i2c_set_clientdata(client, lt9611); 1174 1175 lt9611->bridge.funcs = <9611_bridge_funcs; 1176 lt9611->bridge.of_node = client->dev.of_node; 1177 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1178 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1179 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1180 1181 drm_bridge_add(<9611->bridge); 1182 1183 /* Attach primary DSI */ 1184 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 1185 if (IS_ERR(lt9611->dsi0)) { 1186 ret = PTR_ERR(lt9611->dsi0); 1187 goto err_remove_bridge; 1188 } 1189 1190 /* Attach secondary DSI, if specified */ 1191 if (lt9611->dsi1_node) { 1192 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 1193 if (IS_ERR(lt9611->dsi1)) { 1194 ret = PTR_ERR(lt9611->dsi1); 1195 goto err_remove_bridge; 1196 } 1197 } 1198 1199 lt9611_enable_hpd_interrupts(lt9611); 1200 1201 ret = lt9611_audio_init(dev, lt9611); 1202 if (ret) 1203 goto err_remove_bridge; 1204 1205 return 0; 1206 1207 err_remove_bridge: 1208 drm_bridge_remove(<9611->bridge); 1209 1210 err_disable_regulators: 1211 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1212 1213 err_of_put: 1214 of_node_put(lt9611->dsi1_node); 1215 of_node_put(lt9611->dsi0_node); 1216 1217 return ret; 1218 } 1219 1220 static void lt9611_remove(struct i2c_client *client) 1221 { 1222 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1223 1224 disable_irq(client->irq); 1225 lt9611_audio_exit(lt9611); 1226 drm_bridge_remove(<9611->bridge); 1227 1228 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1229 1230 of_node_put(lt9611->dsi1_node); 1231 of_node_put(lt9611->dsi0_node); 1232 } 1233 1234 static struct i2c_device_id lt9611_id[] = { 1235 { "lontium,lt9611", 0 }, 1236 {} 1237 }; 1238 MODULE_DEVICE_TABLE(i2c, lt9611_id); 1239 1240 static const struct of_device_id lt9611_match_table[] = { 1241 { .compatible = "lontium,lt9611" }, 1242 { } 1243 }; 1244 MODULE_DEVICE_TABLE(of, lt9611_match_table); 1245 1246 static struct i2c_driver lt9611_driver = { 1247 .driver = { 1248 .name = "lt9611", 1249 .of_match_table = lt9611_match_table, 1250 }, 1251 .probe = lt9611_probe, 1252 .remove = lt9611_remove, 1253 .id_table = lt9611_id, 1254 }; 1255 module_i2c_driver(lt9611_driver); 1256 1257 MODULE_LICENSE("GPL v2"); 1258