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 { 0x812a, 0x20 }, 263 }; 264 265 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 266 267 if (pclk > 150000) 268 regmap_write(lt9611->regmap, 0x812d, 0x88); 269 else if (pclk > 70000) 270 regmap_write(lt9611->regmap, 0x812d, 0x99); 271 else 272 regmap_write(lt9611->regmap, 0x812d, 0xaa); 273 274 /* 275 * first divide pclk by 2 first 276 * - write divide by 64k to 19:16 bits which means shift by 17 277 * - write divide by 256 to 15:8 bits which means shift by 9 278 * - write remainder to 7:0 bits, which means shift by 1 279 */ 280 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ 281 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ 282 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ 283 284 regmap_write(lt9611->regmap, 0x82de, 0x20); 285 regmap_write(lt9611->regmap, 0x82de, 0xe0); 286 287 regmap_write(lt9611->regmap, 0x8016, 0xf1); 288 regmap_write(lt9611->regmap, 0x8016, 0xf3); 289 290 return 0; 291 } 292 293 static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg) 294 { 295 unsigned int temp, temp2; 296 int ret; 297 298 ret = regmap_read(lt9611->regmap, reg, &temp); 299 if (ret) 300 return ret; 301 temp <<= 8; 302 ret = regmap_read(lt9611->regmap, reg + 1, &temp2); 303 if (ret) 304 return ret; 305 306 return (temp + temp2); 307 } 308 309 static int lt9611_video_check(struct lt9611 *lt9611) 310 { 311 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk; 312 int temp; 313 314 /* top module video check */ 315 316 /* vactive */ 317 temp = lt9611_read_video_check(lt9611, 0x8282); 318 if (temp < 0) 319 goto end; 320 vactive = temp; 321 322 /* v_total */ 323 temp = lt9611_read_video_check(lt9611, 0x826c); 324 if (temp < 0) 325 goto end; 326 v_total = temp; 327 328 /* h_total_sysclk */ 329 temp = lt9611_read_video_check(lt9611, 0x8286); 330 if (temp < 0) 331 goto end; 332 h_total_sysclk = temp; 333 334 /* hactive_a */ 335 temp = lt9611_read_video_check(lt9611, 0x8382); 336 if (temp < 0) 337 goto end; 338 hactive_a = temp / 3; 339 340 /* hactive_b */ 341 temp = lt9611_read_video_check(lt9611, 0x8386); 342 if (temp < 0) 343 goto end; 344 hactive_b = temp / 3; 345 346 dev_info(lt9611->dev, 347 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n", 348 hactive_a, hactive_b, vactive, v_total, h_total_sysclk); 349 350 return 0; 351 352 end: 353 dev_err(lt9611->dev, "read video check error\n"); 354 return temp; 355 } 356 357 static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611) 358 { 359 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic); 360 regmap_write(lt9611->regmap, 0x8447, lt9611->vic); 361 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */ 362 363 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 364 regmap_write(lt9611->regmap, 0x82d7, 0x04); 365 } 366 367 static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) 368 { 369 struct reg_sequence reg_cfg[] = { 370 { 0x8130, 0x6a }, 371 { 0x8131, 0x44 }, /* HDMI DC mode */ 372 { 0x8132, 0x4a }, 373 { 0x8133, 0x0b }, 374 { 0x8134, 0x00 }, 375 { 0x8135, 0x00 }, 376 { 0x8136, 0x00 }, 377 { 0x8137, 0x44 }, 378 { 0x813f, 0x0f }, 379 { 0x8140, 0xa0 }, 380 { 0x8141, 0xa0 }, 381 { 0x8142, 0xa0 }, 382 { 0x8143, 0xa0 }, 383 { 0x8144, 0x0a }, 384 }; 385 386 /* HDMI AC mode */ 387 if (lt9611->ac_mode) 388 reg_cfg[2].def = 0x73; 389 390 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 391 } 392 393 static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) 394 { 395 struct lt9611 *lt9611 = dev_id; 396 unsigned int irq_flag0 = 0; 397 unsigned int irq_flag3 = 0; 398 399 regmap_read(lt9611->regmap, 0x820f, &irq_flag3); 400 regmap_read(lt9611->regmap, 0x820c, &irq_flag0); 401 402 /* hpd changed low */ 403 if (irq_flag3 & 0x80) { 404 dev_info(lt9611->dev, "hdmi cable disconnected\n"); 405 406 regmap_write(lt9611->regmap, 0x8207, 0xbf); 407 regmap_write(lt9611->regmap, 0x8207, 0x3f); 408 } 409 410 /* hpd changed high */ 411 if (irq_flag3 & 0x40) { 412 dev_info(lt9611->dev, "hdmi cable connected\n"); 413 414 regmap_write(lt9611->regmap, 0x8207, 0x7f); 415 regmap_write(lt9611->regmap, 0x8207, 0x3f); 416 } 417 418 if (irq_flag3 & 0xc0 && lt9611->bridge.dev) 419 drm_kms_helper_hotplug_event(lt9611->bridge.dev); 420 421 /* video input changed */ 422 if (irq_flag0 & 0x01) { 423 dev_info(lt9611->dev, "video input changed\n"); 424 regmap_write(lt9611->regmap, 0x829e, 0xff); 425 regmap_write(lt9611->regmap, 0x829e, 0xf7); 426 regmap_write(lt9611->regmap, 0x8204, 0xff); 427 regmap_write(lt9611->regmap, 0x8204, 0xfe); 428 } 429 430 return IRQ_HANDLED; 431 } 432 433 static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) 434 { 435 unsigned int val; 436 437 regmap_read(lt9611->regmap, 0x8203, &val); 438 439 val &= ~0xc0; 440 regmap_write(lt9611->regmap, 0x8203, val); 441 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */ 442 regmap_write(lt9611->regmap, 0x8207, 0x3f); 443 } 444 445 static void lt9611_sleep_setup(struct lt9611 *lt9611) 446 { 447 const struct reg_sequence sleep_setup[] = { 448 { 0x8024, 0x76 }, 449 { 0x8023, 0x01 }, 450 { 0x8157, 0x03 }, /* set addr pin as output */ 451 { 0x8149, 0x0b }, 452 { 0x8151, 0x30 }, /* disable IRQ */ 453 { 0x8102, 0x48 }, /* MIPI Rx power down */ 454 { 0x8123, 0x80 }, 455 { 0x8130, 0x00 }, 456 { 0x8100, 0x01 }, /* bandgap power down */ 457 { 0x8101, 0x00 }, /* system clk power down */ 458 }; 459 460 regmap_multi_reg_write(lt9611->regmap, 461 sleep_setup, ARRAY_SIZE(sleep_setup)); 462 lt9611->sleep = true; 463 } 464 465 static int lt9611_power_on(struct lt9611 *lt9611) 466 { 467 int ret; 468 const struct reg_sequence seq[] = { 469 /* LT9611_System_Init */ 470 { 0x8101, 0x18 }, /* sel xtal clock */ 471 472 /* timer for frequency meter */ 473 { 0x821b, 0x69 }, /* timer 2 */ 474 { 0x821c, 0x78 }, 475 { 0x82cb, 0x69 }, /* timer 1 */ 476 { 0x82cc, 0x78 }, 477 478 /* irq init */ 479 { 0x8251, 0x01 }, 480 { 0x8258, 0x0a }, /* hpd irq */ 481 { 0x8259, 0x80 }, /* hpd debounce width */ 482 { 0x829e, 0xf7 }, /* video check irq */ 483 484 /* power consumption for work */ 485 { 0x8004, 0xf0 }, 486 { 0x8006, 0xf0 }, 487 { 0x800a, 0x80 }, 488 { 0x800b, 0x40 }, 489 { 0x800d, 0xef }, 490 { 0x8011, 0xfa }, 491 }; 492 493 if (lt9611->power_on) 494 return 0; 495 496 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); 497 if (!ret) 498 lt9611->power_on = true; 499 500 return ret; 501 } 502 503 static int lt9611_power_off(struct lt9611 *lt9611) 504 { 505 int ret; 506 507 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 508 if (!ret) 509 lt9611->power_on = false; 510 511 return ret; 512 } 513 514 static void lt9611_reset(struct lt9611 *lt9611) 515 { 516 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 517 msleep(20); 518 519 gpiod_set_value_cansleep(lt9611->reset_gpio, 0); 520 msleep(20); 521 522 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 523 msleep(100); 524 } 525 526 static void lt9611_assert_5v(struct lt9611 *lt9611) 527 { 528 if (!lt9611->enable_gpio) 529 return; 530 531 gpiod_set_value_cansleep(lt9611->enable_gpio, 1); 532 msleep(20); 533 } 534 535 static int lt9611_regulator_init(struct lt9611 *lt9611) 536 { 537 int ret; 538 539 lt9611->supplies[0].supply = "vdd"; 540 lt9611->supplies[1].supply = "vcc"; 541 542 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); 543 if (ret < 0) 544 return ret; 545 546 return regulator_set_load(lt9611->supplies[0].consumer, 300000); 547 } 548 549 static int lt9611_regulator_enable(struct lt9611 *lt9611) 550 { 551 int ret; 552 553 ret = regulator_enable(lt9611->supplies[0].consumer); 554 if (ret < 0) 555 return ret; 556 557 usleep_range(1000, 10000); 558 559 ret = regulator_enable(lt9611->supplies[1].consumer); 560 if (ret < 0) { 561 regulator_disable(lt9611->supplies[0].consumer); 562 return ret; 563 } 564 565 return 0; 566 } 567 568 static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode) 569 { 570 int i; 571 572 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) { 573 if (lt9611_modes[i].hdisplay == mode->hdisplay && 574 lt9611_modes[i].vdisplay == mode->vdisplay && 575 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 576 return <9611_modes[i]; 577 } 578 } 579 580 return NULL; 581 } 582 583 /* connector funcs */ 584 static enum drm_connector_status __lt9611_detect(struct lt9611 *lt9611) 585 { 586 unsigned int reg_val = 0; 587 int connected = 0; 588 589 regmap_read(lt9611->regmap, 0x825e, ®_val); 590 connected = (reg_val & (BIT(2) | BIT(0))); 591 592 lt9611->status = connected ? connector_status_connected : 593 connector_status_disconnected; 594 595 return lt9611->status; 596 } 597 598 static enum drm_connector_status 599 lt9611_connector_detect(struct drm_connector *connector, bool force) 600 { 601 return __lt9611_detect(connector_to_lt9611(connector)); 602 } 603 604 static int lt9611_read_edid(struct lt9611 *lt9611) 605 { 606 unsigned int temp; 607 int ret = 0; 608 int i, j; 609 610 /* memset to clear old buffer, if any */ 611 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf)); 612 613 regmap_write(lt9611->regmap, 0x8503, 0xc9); 614 615 /* 0xA0 is EDID device address */ 616 regmap_write(lt9611->regmap, 0x8504, 0xa0); 617 /* 0x00 is EDID offset address */ 618 regmap_write(lt9611->regmap, 0x8505, 0x00); 619 620 /* length for read */ 621 regmap_write(lt9611->regmap, 0x8506, EDID_LEN); 622 regmap_write(lt9611->regmap, 0x8514, 0x7f); 623 624 for (i = 0; i < EDID_LOOP; i++) { 625 /* offset address */ 626 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN); 627 regmap_write(lt9611->regmap, 0x8507, 0x36); 628 regmap_write(lt9611->regmap, 0x8507, 0x31); 629 regmap_write(lt9611->regmap, 0x8507, 0x37); 630 usleep_range(5000, 10000); 631 632 regmap_read(lt9611->regmap, 0x8540, &temp); 633 634 if (temp & KEY_DDC_ACCS_DONE) { 635 for (j = 0; j < EDID_LEN; j++) { 636 regmap_read(lt9611->regmap, 0x8583, &temp); 637 lt9611->edid_buf[i * EDID_LEN + j] = temp; 638 } 639 640 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */ 641 dev_err(lt9611->dev, "read edid failed: no ack\n"); 642 ret = -EIO; 643 goto end; 644 645 } else { 646 dev_err(lt9611->dev, "read edid failed: access not done\n"); 647 ret = -EIO; 648 goto end; 649 } 650 } 651 652 end: 653 regmap_write(lt9611->regmap, 0x8507, 0x1f); 654 return ret; 655 } 656 657 static int 658 lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 659 { 660 struct lt9611 *lt9611 = data; 661 int ret; 662 663 if (len > 128) 664 return -EINVAL; 665 666 /* supports up to 1 extension block */ 667 /* TODO: add support for more extension blocks */ 668 if (block > 1) 669 return -EINVAL; 670 671 if (block == 0) { 672 ret = lt9611_read_edid(lt9611); 673 if (ret) { 674 dev_err(lt9611->dev, "edid read failed\n"); 675 return ret; 676 } 677 } 678 679 block %= 2; 680 memcpy(buf, lt9611->edid_buf + (block * 128), len); 681 682 return 0; 683 } 684 685 static int lt9611_connector_get_modes(struct drm_connector *connector) 686 { 687 struct lt9611 *lt9611 = connector_to_lt9611(connector); 688 unsigned int count; 689 struct edid *edid; 690 691 lt9611_power_on(lt9611); 692 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 693 drm_connector_update_edid_property(connector, edid); 694 count = drm_add_edid_modes(connector, edid); 695 kfree(edid); 696 697 return count; 698 } 699 700 static enum drm_mode_status 701 lt9611_connector_mode_valid(struct drm_connector *connector, 702 struct drm_display_mode *mode) 703 { 704 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 705 706 return lt9611_mode ? MODE_OK : MODE_BAD; 707 } 708 709 /* bridge funcs */ 710 static void 711 lt9611_bridge_atomic_enable(struct drm_bridge *bridge, 712 struct drm_bridge_state *old_bridge_state) 713 { 714 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 715 716 if (lt9611_power_on(lt9611)) { 717 dev_err(lt9611->dev, "power on failed\n"); 718 return; 719 } 720 721 lt9611_mipi_input_analog(lt9611); 722 lt9611_hdmi_tx_digital(lt9611); 723 lt9611_hdmi_tx_phy(lt9611); 724 725 msleep(500); 726 727 lt9611_video_check(lt9611); 728 729 /* Enable HDMI output */ 730 regmap_write(lt9611->regmap, 0x8130, 0xea); 731 } 732 733 static void 734 lt9611_bridge_atomic_disable(struct drm_bridge *bridge, 735 struct drm_bridge_state *old_bridge_state) 736 { 737 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 738 int ret; 739 740 /* Disable HDMI output */ 741 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 742 if (ret) { 743 dev_err(lt9611->dev, "video on failed\n"); 744 return; 745 } 746 747 if (lt9611_power_off(lt9611)) { 748 dev_err(lt9611->dev, "power on failed\n"); 749 return; 750 } 751 } 752 753 static struct 754 drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { 755 .get_modes = lt9611_connector_get_modes, 756 .mode_valid = lt9611_connector_mode_valid, 757 }; 758 759 static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { 760 .fill_modes = drm_helper_probe_single_connector_modes, 761 .detect = lt9611_connector_detect, 762 .destroy = drm_connector_cleanup, 763 .reset = drm_atomic_helper_connector_reset, 764 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 765 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 766 }; 767 768 static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 769 struct device_node *dsi_node) 770 { 771 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL }; 772 struct mipi_dsi_device *dsi; 773 struct mipi_dsi_host *host; 774 struct device *dev = lt9611->dev; 775 int ret; 776 777 host = of_find_mipi_dsi_host_by_node(dsi_node); 778 if (!host) { 779 dev_err(lt9611->dev, "failed to find dsi host\n"); 780 return ERR_PTR(-EPROBE_DEFER); 781 } 782 783 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 784 if (IS_ERR(dsi)) { 785 dev_err(lt9611->dev, "failed to create dsi device\n"); 786 return dsi; 787 } 788 789 dsi->lanes = 4; 790 dsi->format = MIPI_DSI_FMT_RGB888; 791 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 792 MIPI_DSI_MODE_VIDEO_HSE; 793 794 ret = devm_mipi_dsi_attach(dev, dsi); 795 if (ret < 0) { 796 dev_err(dev, "failed to attach dsi to host\n"); 797 return ERR_PTR(ret); 798 } 799 800 return dsi; 801 } 802 803 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611) 804 { 805 int ret; 806 807 ret = drm_connector_init(bridge->dev, <9611->connector, 808 <9611_bridge_connector_funcs, 809 DRM_MODE_CONNECTOR_HDMIA); 810 if (ret) { 811 DRM_ERROR("Failed to initialize connector with drm\n"); 812 return ret; 813 } 814 815 drm_connector_helper_add(<9611->connector, 816 <9611_bridge_connector_helper_funcs); 817 818 if (!bridge->encoder) { 819 DRM_ERROR("Parent encoder object not found"); 820 return -ENODEV; 821 } 822 823 drm_connector_attach_encoder(<9611->connector, bridge->encoder); 824 825 return 0; 826 } 827 828 static int lt9611_bridge_attach(struct drm_bridge *bridge, 829 enum drm_bridge_attach_flags flags) 830 { 831 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 832 int ret; 833 834 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 835 ret = lt9611_connector_init(bridge, lt9611); 836 if (ret < 0) 837 return ret; 838 } 839 840 return 0; 841 } 842 843 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 844 const struct drm_display_info *info, 845 const struct drm_display_mode *mode) 846 { 847 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); 848 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 849 850 if (!lt9611_mode) 851 return MODE_BAD; 852 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) 853 return MODE_PANEL; 854 else 855 return MODE_OK; 856 } 857 858 static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) 859 { 860 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 861 862 if (!lt9611->sleep) 863 return; 864 865 lt9611_reset(lt9611); 866 regmap_write(lt9611->regmap, 0x80ee, 0x01); 867 868 lt9611->sleep = false; 869 } 870 871 static void 872 lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge, 873 struct drm_bridge_state *old_bridge_state) 874 { 875 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 876 877 lt9611_sleep_setup(lt9611); 878 } 879 880 static void lt9611_bridge_mode_set(struct drm_bridge *bridge, 881 const struct drm_display_mode *mode, 882 const struct drm_display_mode *adj_mode) 883 { 884 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 885 struct hdmi_avi_infoframe avi_frame; 886 int ret; 887 888 lt9611_bridge_pre_enable(bridge); 889 890 lt9611_mipi_input_digital(lt9611, mode); 891 lt9611_pll_setup(lt9611, mode); 892 lt9611_mipi_video_setup(lt9611, mode); 893 lt9611_pcr_setup(lt9611, mode); 894 895 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, 896 <9611->connector, 897 mode); 898 if (!ret) 899 lt9611->vic = avi_frame.video_code; 900 } 901 902 static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 903 { 904 return __lt9611_detect(bridge_to_lt9611(bridge)); 905 } 906 907 static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge, 908 struct drm_connector *connector) 909 { 910 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 911 912 lt9611_power_on(lt9611); 913 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); 914 } 915 916 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 917 { 918 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 919 920 lt9611_enable_hpd_interrupts(lt9611); 921 } 922 923 #define MAX_INPUT_SEL_FORMATS 1 924 925 static u32 * 926 lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 927 struct drm_bridge_state *bridge_state, 928 struct drm_crtc_state *crtc_state, 929 struct drm_connector_state *conn_state, 930 u32 output_fmt, 931 unsigned int *num_input_fmts) 932 { 933 u32 *input_fmts; 934 935 *num_input_fmts = 0; 936 937 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 938 GFP_KERNEL); 939 if (!input_fmts) 940 return NULL; 941 942 /* This is the DSI-end bus format */ 943 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 944 *num_input_fmts = 1; 945 946 return input_fmts; 947 } 948 949 static const struct drm_bridge_funcs lt9611_bridge_funcs = { 950 .attach = lt9611_bridge_attach, 951 .mode_valid = lt9611_bridge_mode_valid, 952 .mode_set = lt9611_bridge_mode_set, 953 .detect = lt9611_bridge_detect, 954 .get_edid = lt9611_bridge_get_edid, 955 .hpd_enable = lt9611_bridge_hpd_enable, 956 957 .atomic_enable = lt9611_bridge_atomic_enable, 958 .atomic_disable = lt9611_bridge_atomic_disable, 959 .atomic_post_disable = lt9611_bridge_atomic_post_disable, 960 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 961 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 962 .atomic_reset = drm_atomic_helper_bridge_reset, 963 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts, 964 }; 965 966 static int lt9611_parse_dt(struct device *dev, 967 struct lt9611 *lt9611) 968 { 969 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 970 if (!lt9611->dsi0_node) { 971 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 972 return -ENODEV; 973 } 974 975 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 976 977 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 978 979 return 0; 980 } 981 982 static int lt9611_gpio_init(struct lt9611 *lt9611) 983 { 984 struct device *dev = lt9611->dev; 985 986 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 987 if (IS_ERR(lt9611->reset_gpio)) { 988 dev_err(dev, "failed to acquire reset gpio\n"); 989 return PTR_ERR(lt9611->reset_gpio); 990 } 991 992 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 993 GPIOD_OUT_LOW); 994 if (IS_ERR(lt9611->enable_gpio)) { 995 dev_err(dev, "failed to acquire enable gpio\n"); 996 return PTR_ERR(lt9611->enable_gpio); 997 } 998 999 return 0; 1000 } 1001 1002 static int lt9611_read_device_rev(struct lt9611 *lt9611) 1003 { 1004 unsigned int rev; 1005 int ret; 1006 1007 regmap_write(lt9611->regmap, 0x80ee, 0x01); 1008 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 1009 if (ret) 1010 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 1011 else 1012 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 1013 1014 return ret; 1015 } 1016 1017 static int lt9611_hdmi_hw_params(struct device *dev, void *data, 1018 struct hdmi_codec_daifmt *fmt, 1019 struct hdmi_codec_params *hparms) 1020 { 1021 struct lt9611 *lt9611 = data; 1022 1023 if (hparms->sample_rate == 48000) 1024 regmap_write(lt9611->regmap, 0x840f, 0x2b); 1025 else if (hparms->sample_rate == 96000) 1026 regmap_write(lt9611->regmap, 0x840f, 0xab); 1027 else 1028 return -EINVAL; 1029 1030 regmap_write(lt9611->regmap, 0x8435, 0x00); 1031 regmap_write(lt9611->regmap, 0x8436, 0x18); 1032 regmap_write(lt9611->regmap, 0x8437, 0x00); 1033 1034 return 0; 1035 } 1036 1037 static int lt9611_audio_startup(struct device *dev, void *data) 1038 { 1039 struct lt9611 *lt9611 = data; 1040 1041 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 1042 regmap_write(lt9611->regmap, 0x82d7, 0x04); 1043 1044 regmap_write(lt9611->regmap, 0x8406, 0x08); 1045 regmap_write(lt9611->regmap, 0x8407, 0x10); 1046 1047 regmap_write(lt9611->regmap, 0x8434, 0xd5); 1048 1049 return 0; 1050 } 1051 1052 static void lt9611_audio_shutdown(struct device *dev, void *data) 1053 { 1054 struct lt9611 *lt9611 = data; 1055 1056 regmap_write(lt9611->regmap, 0x8406, 0x00); 1057 regmap_write(lt9611->regmap, 0x8407, 0x00); 1058 } 1059 1060 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1061 struct device_node *endpoint) 1062 { 1063 struct of_endpoint of_ep; 1064 int ret; 1065 1066 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1067 if (ret < 0) 1068 return ret; 1069 1070 /* 1071 * HDMI sound should be located as reg = <2> 1072 * Then, it is sound port 0 1073 */ 1074 if (of_ep.port == 2) 1075 return 0; 1076 1077 return -EINVAL; 1078 } 1079 1080 static const struct hdmi_codec_ops lt9611_codec_ops = { 1081 .hw_params = lt9611_hdmi_hw_params, 1082 .audio_shutdown = lt9611_audio_shutdown, 1083 .audio_startup = lt9611_audio_startup, 1084 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1085 }; 1086 1087 static struct hdmi_codec_pdata codec_data = { 1088 .ops = <9611_codec_ops, 1089 .max_i2s_channels = 8, 1090 .i2s = 1, 1091 }; 1092 1093 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1094 { 1095 codec_data.data = lt9611; 1096 lt9611->audio_pdev = 1097 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1098 PLATFORM_DEVID_AUTO, 1099 &codec_data, sizeof(codec_data)); 1100 1101 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1102 } 1103 1104 static void lt9611_audio_exit(struct lt9611 *lt9611) 1105 { 1106 if (lt9611->audio_pdev) { 1107 platform_device_unregister(lt9611->audio_pdev); 1108 lt9611->audio_pdev = NULL; 1109 } 1110 } 1111 1112 static int lt9611_probe(struct i2c_client *client) 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_new = 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