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_edid.h> 22#include <drm/drm_mipi_dsi.h> 23#include <drm/drm_of.h> 24#include <drm/drm_print.h> 25#include <drm/drm_probe_helper.h> 26 27#define EDID_SEG_SIZE 256 28#define EDID_LEN 32 29#define EDID_LOOP 8 30#define KEY_DDC_ACCS_DONE 0x02 31#define DDC_NO_ACK 0x50 32 33#define LT9611_4LANES 0 34 35struct lt9611 { 36 struct device *dev; 37 struct drm_bridge bridge; 38 struct drm_bridge *next_bridge; 39 40 struct regmap *regmap; 41 42 struct device_node *dsi0_node; 43 struct device_node *dsi1_node; 44 struct mipi_dsi_device *dsi0; 45 struct mipi_dsi_device *dsi1; 46 struct platform_device *audio_pdev; 47 48 bool ac_mode; 49 50 struct gpio_desc *reset_gpio; 51 struct gpio_desc *enable_gpio; 52 53 bool power_on; 54 bool sleep; 55 56 struct regulator_bulk_data supplies[2]; 57 58 struct i2c_client *client; 59 60 enum drm_connector_status status; 61 62 u8 edid_buf[EDID_SEG_SIZE]; 63}; 64 65#define LT9611_PAGE_CONTROL 0xff 66 67static const struct regmap_range_cfg lt9611_ranges[] = { 68 { 69 .name = "register_range", 70 .range_min = 0, 71 .range_max = 0x85ff, 72 .selector_reg = LT9611_PAGE_CONTROL, 73 .selector_mask = 0xff, 74 .selector_shift = 0, 75 .window_start = 0, 76 .window_len = 0x100, 77 }, 78}; 79 80static const struct regmap_config lt9611_regmap_config = { 81 .reg_bits = 8, 82 .val_bits = 8, 83 .max_register = 0xffff, 84 .ranges = lt9611_ranges, 85 .num_ranges = ARRAY_SIZE(lt9611_ranges), 86}; 87 88static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) 89{ 90 return container_of(bridge, struct lt9611, bridge); 91} 92 93static int lt9611_mipi_input_analog(struct lt9611 *lt9611) 94{ 95 const struct reg_sequence reg_cfg[] = { 96 { 0x8106, 0x40 }, /* port A rx current */ 97 { 0x810a, 0xfe }, /* port A ldo voltage set */ 98 { 0x810b, 0xbf }, /* enable port A lprx */ 99 { 0x8111, 0x40 }, /* port B rx current */ 100 { 0x8115, 0xfe }, /* port B ldo voltage set */ 101 { 0x8116, 0xbf }, /* enable port B lprx */ 102 103 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */ 104 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */ 105 }; 106 107 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 108} 109 110static int lt9611_mipi_input_digital(struct lt9611 *lt9611, 111 const struct drm_display_mode *mode) 112{ 113 struct reg_sequence reg_cfg[] = { 114 { 0x8300, LT9611_4LANES }, 115 { 0x830a, 0x00 }, 116 { 0x824f, 0x80 }, 117 { 0x8250, 0x10 }, 118 { 0x8302, 0x0a }, 119 { 0x8306, 0x0a }, 120 }; 121 122 if (lt9611->dsi1_node) 123 reg_cfg[1].def = 0x03; 124 125 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 126} 127 128static void lt9611_mipi_video_setup(struct lt9611 *lt9611, 129 const struct drm_display_mode *mode) 130{ 131 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch; 132 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch; 133 134 h_total = mode->htotal; 135 v_total = mode->vtotal; 136 137 hactive = mode->hdisplay; 138 hsync_len = mode->hsync_end - mode->hsync_start; 139 hfront_porch = mode->hsync_start - mode->hdisplay; 140 hsync_porch = mode->htotal - mode->hsync_start; 141 142 vactive = mode->vdisplay; 143 vsync_len = mode->vsync_end - mode->vsync_start; 144 vfront_porch = mode->vsync_start - mode->vdisplay; 145 vsync_porch = mode->vtotal - mode->vsync_start; 146 147 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256)); 148 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256)); 149 150 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256)); 151 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256)); 152 153 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256)); 154 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256)); 155 156 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256)); 157 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256)); 158 159 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256)); 160 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256)); 161 162 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256)); 163 164 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256)); 165 166 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256)); 167 168 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) | 169 ((hfront_porch / 256) << 4)); 170 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256)); 171} 172 173static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int postdiv) 174{ 175 unsigned int pcr_m = mode->clock * 5 * postdiv / 27000; 176 const struct reg_sequence reg_cfg[] = { 177 { 0x830b, 0x01 }, 178 { 0x830c, 0x10 }, 179 { 0x8348, 0x00 }, 180 { 0x8349, 0x81 }, 181 182 /* stage 1 */ 183 { 0x8321, 0x4a }, 184 { 0x8324, 0x71 }, 185 { 0x8325, 0x30 }, 186 { 0x832a, 0x01 }, 187 188 /* stage 2 */ 189 { 0x834a, 0x40 }, 190 191 /* MK limit */ 192 { 0x832d, 0x38 }, 193 { 0x8331, 0x08 }, 194 }; 195 u8 pol = 0x10; 196 197 if (mode->flags & DRM_MODE_FLAG_NHSYNC) 198 pol |= 0x2; 199 if (mode->flags & DRM_MODE_FLAG_NVSYNC) 200 pol |= 0x1; 201 regmap_write(lt9611->regmap, 0x831d, pol); 202 203 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 204 if (lt9611->dsi1_node) { 205 unsigned int hact = mode->hdisplay; 206 207 hact >>= 2; 208 hact += 0x50; 209 hact = min(hact, 0x3e0U); 210 regmap_write(lt9611->regmap, 0x830b, hact / 256); 211 regmap_write(lt9611->regmap, 0x830c, hact % 256); 212 regmap_write(lt9611->regmap, 0x8348, hact / 256); 213 regmap_write(lt9611->regmap, 0x8349, hact % 256); 214 } 215 216 regmap_write(lt9611->regmap, 0x8326, pcr_m); 217 218 /* pcr rst */ 219 regmap_write(lt9611->regmap, 0x8011, 0x5a); 220 regmap_write(lt9611->regmap, 0x8011, 0xfa); 221} 222 223static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int *postdiv) 224{ 225 unsigned int pclk = mode->clock; 226 const struct reg_sequence reg_cfg[] = { 227 /* txpll init */ 228 { 0x8123, 0x40 }, 229 { 0x8124, 0x64 }, 230 { 0x8125, 0x80 }, 231 { 0x8126, 0x55 }, 232 { 0x812c, 0x37 }, 233 { 0x812f, 0x01 }, 234 { 0x8126, 0x55 }, 235 { 0x8127, 0x66 }, 236 { 0x8128, 0x88 }, 237 { 0x812a, 0x20 }, 238 }; 239 240 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 241 242 if (pclk > 150000) { 243 regmap_write(lt9611->regmap, 0x812d, 0x88); 244 *postdiv = 1; 245 } else if (pclk > 70000) { 246 regmap_write(lt9611->regmap, 0x812d, 0x99); 247 *postdiv = 2; 248 } else { 249 regmap_write(lt9611->regmap, 0x812d, 0xaa); 250 *postdiv = 4; 251 } 252 253 /* 254 * first divide pclk by 2 first 255 * - write divide by 64k to 19:16 bits which means shift by 17 256 * - write divide by 256 to 15:8 bits which means shift by 9 257 * - write remainder to 7:0 bits, which means shift by 1 258 */ 259 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ 260 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ 261 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ 262 263 regmap_write(lt9611->regmap, 0x82de, 0x20); 264 regmap_write(lt9611->regmap, 0x82de, 0xe0); 265 266 regmap_write(lt9611->regmap, 0x8016, 0xf1); 267 regmap_write(lt9611->regmap, 0x8016, 0xf3); 268 269 return 0; 270} 271 272static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg) 273{ 274 unsigned int temp, temp2; 275 int ret; 276 277 ret = regmap_read(lt9611->regmap, reg, &temp); 278 if (ret) 279 return ret; 280 temp <<= 8; 281 ret = regmap_read(lt9611->regmap, reg + 1, &temp2); 282 if (ret) 283 return ret; 284 285 return (temp + temp2); 286} 287 288static int lt9611_video_check(struct lt9611 *lt9611) 289{ 290 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk; 291 int temp; 292 293 /* top module video check */ 294 295 /* vactive */ 296 temp = lt9611_read_video_check(lt9611, 0x8282); 297 if (temp < 0) 298 goto end; 299 vactive = temp; 300 301 /* v_total */ 302 temp = lt9611_read_video_check(lt9611, 0x826c); 303 if (temp < 0) 304 goto end; 305 v_total = temp; 306 307 /* h_total_sysclk */ 308 temp = lt9611_read_video_check(lt9611, 0x8286); 309 if (temp < 0) 310 goto end; 311 h_total_sysclk = temp; 312 313 /* hactive_a */ 314 temp = lt9611_read_video_check(lt9611, 0x8382); 315 if (temp < 0) 316 goto end; 317 hactive_a = temp / 3; 318 319 /* hactive_b */ 320 temp = lt9611_read_video_check(lt9611, 0x8386); 321 if (temp < 0) 322 goto end; 323 hactive_b = temp / 3; 324 325 dev_info(lt9611->dev, 326 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n", 327 hactive_a, hactive_b, vactive, v_total, h_total_sysclk); 328 329 return 0; 330 331end: 332 dev_err(lt9611->dev, "read video check error\n"); 333 return temp; 334} 335 336static void lt9611_hdmi_set_infoframes(struct lt9611 *lt9611, 337 struct drm_connector *connector, 338 struct drm_display_mode *mode) 339{ 340 union hdmi_infoframe infoframe; 341 ssize_t len; 342 u8 iframes = 0x0a; /* UD1 infoframe */ 343 u8 buf[32]; 344 int ret; 345 int i; 346 347 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe.avi, 348 connector, 349 mode); 350 if (ret < 0) 351 goto out; 352 353 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf)); 354 if (len < 0) 355 goto out; 356 357 for (i = 0; i < len; i++) 358 regmap_write(lt9611->regmap, 0x8440 + i, buf[i]); 359 360 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe.vendor.hdmi, 361 connector, 362 mode); 363 if (ret < 0) 364 goto out; 365 366 len = hdmi_infoframe_pack(&infoframe, buf, sizeof(buf)); 367 if (len < 0) 368 goto out; 369 370 for (i = 0; i < len; i++) 371 regmap_write(lt9611->regmap, 0x8474 + i, buf[i]); 372 373 iframes |= 0x20; 374 375out: 376 regmap_write(lt9611->regmap, 0x843d, iframes); /* UD1 infoframe */ 377} 378 379static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611, bool is_hdmi) 380{ 381 if (is_hdmi) 382 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 383 else 384 regmap_write(lt9611->regmap, 0x82d6, 0x0c); 385 regmap_write(lt9611->regmap, 0x82d7, 0x04); 386} 387 388static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) 389{ 390 struct reg_sequence reg_cfg[] = { 391 { 0x8130, 0x6a }, 392 { 0x8131, 0x44 }, /* HDMI DC mode */ 393 { 0x8132, 0x4a }, 394 { 0x8133, 0x0b }, 395 { 0x8134, 0x00 }, 396 { 0x8135, 0x00 }, 397 { 0x8136, 0x00 }, 398 { 0x8137, 0x44 }, 399 { 0x813f, 0x0f }, 400 { 0x8140, 0xa0 }, 401 { 0x8141, 0xa0 }, 402 { 0x8142, 0xa0 }, 403 { 0x8143, 0xa0 }, 404 { 0x8144, 0x0a }, 405 }; 406 407 /* HDMI AC mode */ 408 if (lt9611->ac_mode) 409 reg_cfg[2].def = 0x73; 410 411 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); 412} 413 414static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) 415{ 416 struct lt9611 *lt9611 = dev_id; 417 unsigned int irq_flag0 = 0; 418 unsigned int irq_flag3 = 0; 419 420 regmap_read(lt9611->regmap, 0x820f, &irq_flag3); 421 regmap_read(lt9611->regmap, 0x820c, &irq_flag0); 422 423 /* hpd changed low */ 424 if (irq_flag3 & 0x80) { 425 dev_info(lt9611->dev, "hdmi cable disconnected\n"); 426 427 regmap_write(lt9611->regmap, 0x8207, 0xbf); 428 regmap_write(lt9611->regmap, 0x8207, 0x3f); 429 } 430 431 /* hpd changed high */ 432 if (irq_flag3 & 0x40) { 433 dev_info(lt9611->dev, "hdmi cable connected\n"); 434 435 regmap_write(lt9611->regmap, 0x8207, 0x7f); 436 regmap_write(lt9611->regmap, 0x8207, 0x3f); 437 } 438 439 if (irq_flag3 & 0xc0 && lt9611->bridge.dev) 440 drm_kms_helper_hotplug_event(lt9611->bridge.dev); 441 442 /* video input changed */ 443 if (irq_flag0 & 0x01) { 444 dev_info(lt9611->dev, "video input changed\n"); 445 regmap_write(lt9611->regmap, 0x829e, 0xff); 446 regmap_write(lt9611->regmap, 0x829e, 0xf7); 447 regmap_write(lt9611->regmap, 0x8204, 0xff); 448 regmap_write(lt9611->regmap, 0x8204, 0xfe); 449 } 450 451 return IRQ_HANDLED; 452} 453 454static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) 455{ 456 unsigned int val; 457 458 regmap_read(lt9611->regmap, 0x8203, &val); 459 460 val &= ~0xc0; 461 regmap_write(lt9611->regmap, 0x8203, val); 462 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */ 463 regmap_write(lt9611->regmap, 0x8207, 0x3f); 464} 465 466static void lt9611_sleep_setup(struct lt9611 *lt9611) 467{ 468 const struct reg_sequence sleep_setup[] = { 469 { 0x8024, 0x76 }, 470 { 0x8023, 0x01 }, 471 { 0x8157, 0x03 }, /* set addr pin as output */ 472 { 0x8149, 0x0b }, 473 474 { 0x8102, 0x48 }, /* MIPI Rx power down */ 475 { 0x8123, 0x80 }, 476 { 0x8130, 0x00 }, 477 { 0x8011, 0x0a }, 478 }; 479 480 regmap_multi_reg_write(lt9611->regmap, 481 sleep_setup, ARRAY_SIZE(sleep_setup)); 482 lt9611->sleep = true; 483} 484 485static int lt9611_power_on(struct lt9611 *lt9611) 486{ 487 int ret; 488 const struct reg_sequence seq[] = { 489 /* LT9611_System_Init */ 490 { 0x8101, 0x18 }, /* sel xtal clock */ 491 492 /* timer for frequency meter */ 493 { 0x821b, 0x69 }, /* timer 2 */ 494 { 0x821c, 0x78 }, 495 { 0x82cb, 0x69 }, /* timer 1 */ 496 { 0x82cc, 0x78 }, 497 498 /* irq init */ 499 { 0x8251, 0x01 }, 500 { 0x8258, 0x0a }, /* hpd irq */ 501 { 0x8259, 0x80 }, /* hpd debounce width */ 502 { 0x829e, 0xf7 }, /* video check irq */ 503 504 /* power consumption for work */ 505 { 0x8004, 0xf0 }, 506 { 0x8006, 0xf0 }, 507 { 0x800a, 0x80 }, 508 { 0x800b, 0x40 }, 509 { 0x800d, 0xef }, 510 { 0x8011, 0xfa }, 511 }; 512 513 if (lt9611->power_on) 514 return 0; 515 516 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); 517 if (!ret) 518 lt9611->power_on = true; 519 520 return ret; 521} 522 523static int lt9611_power_off(struct lt9611 *lt9611) 524{ 525 int ret; 526 527 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 528 if (!ret) 529 lt9611->power_on = false; 530 531 return ret; 532} 533 534static void lt9611_reset(struct lt9611 *lt9611) 535{ 536 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 537 msleep(20); 538 539 gpiod_set_value_cansleep(lt9611->reset_gpio, 0); 540 msleep(20); 541 542 gpiod_set_value_cansleep(lt9611->reset_gpio, 1); 543 msleep(100); 544} 545 546static void lt9611_assert_5v(struct lt9611 *lt9611) 547{ 548 if (!lt9611->enable_gpio) 549 return; 550 551 gpiod_set_value_cansleep(lt9611->enable_gpio, 1); 552 msleep(20); 553} 554 555static int lt9611_regulator_init(struct lt9611 *lt9611) 556{ 557 int ret; 558 559 lt9611->supplies[0].supply = "vdd"; 560 lt9611->supplies[1].supply = "vcc"; 561 562 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); 563 if (ret < 0) 564 return ret; 565 566 return regulator_set_load(lt9611->supplies[0].consumer, 300000); 567} 568 569static int lt9611_regulator_enable(struct lt9611 *lt9611) 570{ 571 int ret; 572 573 ret = regulator_enable(lt9611->supplies[0].consumer); 574 if (ret < 0) 575 return ret; 576 577 usleep_range(1000, 10000); 578 579 ret = regulator_enable(lt9611->supplies[1].consumer); 580 if (ret < 0) { 581 regulator_disable(lt9611->supplies[0].consumer); 582 return ret; 583 } 584 585 return 0; 586} 587 588static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge) 589{ 590 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 591 unsigned int reg_val = 0; 592 int connected = 0; 593 594 regmap_read(lt9611->regmap, 0x825e, ®_val); 595 connected = (reg_val & (BIT(2) | BIT(0))); 596 597 lt9611->status = connected ? connector_status_connected : 598 connector_status_disconnected; 599 600 return lt9611->status; 601} 602 603static 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 651end: 652 regmap_write(lt9611->regmap, 0x8507, 0x1f); 653 return ret; 654} 655 656static int 657lt9611_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/* bridge funcs */ 685static void 686lt9611_bridge_atomic_enable(struct drm_bridge *bridge, 687 struct drm_bridge_state *old_bridge_state) 688{ 689 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 690 struct drm_atomic_state *state = old_bridge_state->base.state; 691 struct drm_connector *connector; 692 struct drm_connector_state *conn_state; 693 struct drm_crtc_state *crtc_state; 694 struct drm_display_mode *mode; 695 unsigned int postdiv; 696 697 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); 698 if (WARN_ON(!connector)) 699 return; 700 701 conn_state = drm_atomic_get_new_connector_state(state, connector); 702 if (WARN_ON(!conn_state)) 703 return; 704 705 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); 706 if (WARN_ON(!crtc_state)) 707 return; 708 709 mode = &crtc_state->adjusted_mode; 710 711 lt9611_mipi_input_digital(lt9611, mode); 712 lt9611_pll_setup(lt9611, mode, &postdiv); 713 lt9611_mipi_video_setup(lt9611, mode); 714 lt9611_pcr_setup(lt9611, mode, postdiv); 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_set_infoframes(lt9611, connector, mode); 723 lt9611_hdmi_tx_digital(lt9611, connector->display_info.is_hdmi); 724 lt9611_hdmi_tx_phy(lt9611); 725 726 msleep(500); 727 728 lt9611_video_check(lt9611); 729 730 /* Enable HDMI output */ 731 regmap_write(lt9611->regmap, 0x8130, 0xea); 732} 733 734static void 735lt9611_bridge_atomic_disable(struct drm_bridge *bridge, 736 struct drm_bridge_state *old_bridge_state) 737{ 738 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 739 int ret; 740 741 /* Disable HDMI output */ 742 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); 743 if (ret) { 744 dev_err(lt9611->dev, "video on failed\n"); 745 return; 746 } 747 748 if (lt9611_power_off(lt9611)) { 749 dev_err(lt9611->dev, "power on failed\n"); 750 return; 751 } 752} 753 754static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, 755 struct device_node *dsi_node) 756{ 757 const struct mipi_dsi_device_info info = { "lt9611", 0, lt9611->dev->of_node}; 758 struct mipi_dsi_device *dsi; 759 struct mipi_dsi_host *host; 760 struct device *dev = lt9611->dev; 761 int ret; 762 763 host = of_find_mipi_dsi_host_by_node(dsi_node); 764 if (!host) { 765 dev_err(lt9611->dev, "failed to find dsi host\n"); 766 return ERR_PTR(-EPROBE_DEFER); 767 } 768 769 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 770 if (IS_ERR(dsi)) { 771 dev_err(lt9611->dev, "failed to create dsi device\n"); 772 return dsi; 773 } 774 775 dsi->lanes = 4; 776 dsi->format = MIPI_DSI_FMT_RGB888; 777 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 778 MIPI_DSI_MODE_VIDEO_HSE; 779 780 ret = devm_mipi_dsi_attach(dev, dsi); 781 if (ret < 0) { 782 dev_err(dev, "failed to attach dsi to host\n"); 783 return ERR_PTR(ret); 784 } 785 786 return dsi; 787} 788 789static int lt9611_bridge_attach(struct drm_bridge *bridge, 790 enum drm_bridge_attach_flags flags) 791{ 792 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 793 794 return drm_bridge_attach(bridge->encoder, lt9611->next_bridge, 795 bridge, flags); 796} 797 798static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 799 const struct drm_display_info *info, 800 const struct drm_display_mode *mode) 801{ 802 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 803 804 if (mode->hdisplay > 3840) 805 return MODE_BAD_HVALUE; 806 807 if (mode->vdisplay > 2160) 808 return MODE_BAD_VVALUE; 809 810 if (mode->hdisplay == 3840 && 811 mode->vdisplay == 2160 && 812 drm_mode_vrefresh(mode) > 30) 813 return MODE_CLOCK_HIGH; 814 815 if (mode->hdisplay > 2000 && !lt9611->dsi1_node) 816 return MODE_PANEL; 817 else 818 return MODE_OK; 819} 820 821static void lt9611_bridge_atomic_pre_enable(struct drm_bridge *bridge, 822 struct drm_bridge_state *old_bridge_state) 823{ 824 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 825 static const struct reg_sequence reg_cfg[] = { 826 { 0x8102, 0x12 }, 827 { 0x8123, 0x40 }, 828 { 0x8130, 0xea }, 829 { 0x8011, 0xfa }, 830 }; 831 832 if (!lt9611->sleep) 833 return; 834 835 regmap_multi_reg_write(lt9611->regmap, 836 reg_cfg, ARRAY_SIZE(reg_cfg)); 837 838 lt9611->sleep = false; 839} 840 841static void 842lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge, 843 struct drm_bridge_state *old_bridge_state) 844{ 845 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 846 847 lt9611_sleep_setup(lt9611); 848} 849 850static const struct drm_edid *lt9611_bridge_edid_read(struct drm_bridge *bridge, 851 struct drm_connector *connector) 852{ 853 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 854 855 lt9611_power_on(lt9611); 856 return drm_edid_read_custom(connector, lt9611_get_edid_block, lt9611); 857} 858 859static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 860{ 861 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 862 863 lt9611_enable_hpd_interrupts(lt9611); 864} 865 866#define MAX_INPUT_SEL_FORMATS 1 867 868static u32 * 869lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 870 struct drm_bridge_state *bridge_state, 871 struct drm_crtc_state *crtc_state, 872 struct drm_connector_state *conn_state, 873 u32 output_fmt, 874 unsigned int *num_input_fmts) 875{ 876 u32 *input_fmts; 877 878 *num_input_fmts = 0; 879 880 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 881 GFP_KERNEL); 882 if (!input_fmts) 883 return NULL; 884 885 /* This is the DSI-end bus format */ 886 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 887 *num_input_fmts = 1; 888 889 return input_fmts; 890} 891 892static const struct drm_bridge_funcs lt9611_bridge_funcs = { 893 .attach = lt9611_bridge_attach, 894 .mode_valid = lt9611_bridge_mode_valid, 895 .detect = lt9611_bridge_detect, 896 .edid_read = lt9611_bridge_edid_read, 897 .hpd_enable = lt9611_bridge_hpd_enable, 898 899 .atomic_pre_enable = lt9611_bridge_atomic_pre_enable, 900 .atomic_enable = lt9611_bridge_atomic_enable, 901 .atomic_disable = lt9611_bridge_atomic_disable, 902 .atomic_post_disable = lt9611_bridge_atomic_post_disable, 903 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 904 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 905 .atomic_reset = drm_atomic_helper_bridge_reset, 906 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts, 907}; 908 909static int lt9611_parse_dt(struct device *dev, 910 struct lt9611 *lt9611) 911{ 912 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 913 if (!lt9611->dsi0_node) { 914 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 915 return -ENODEV; 916 } 917 918 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 919 920 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 921 922 return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, <9611->next_bridge); 923} 924 925static int lt9611_gpio_init(struct lt9611 *lt9611) 926{ 927 struct device *dev = lt9611->dev; 928 929 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 930 if (IS_ERR(lt9611->reset_gpio)) { 931 dev_err(dev, "failed to acquire reset gpio\n"); 932 return PTR_ERR(lt9611->reset_gpio); 933 } 934 935 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 936 GPIOD_OUT_LOW); 937 if (IS_ERR(lt9611->enable_gpio)) { 938 dev_err(dev, "failed to acquire enable gpio\n"); 939 return PTR_ERR(lt9611->enable_gpio); 940 } 941 942 return 0; 943} 944 945static int lt9611_read_device_rev(struct lt9611 *lt9611) 946{ 947 unsigned int rev; 948 int ret; 949 950 regmap_write(lt9611->regmap, 0x80ee, 0x01); 951 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 952 if (ret) 953 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 954 else 955 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 956 957 return ret; 958} 959 960static int lt9611_hdmi_hw_params(struct device *dev, void *data, 961 struct hdmi_codec_daifmt *fmt, 962 struct hdmi_codec_params *hparms) 963{ 964 struct lt9611 *lt9611 = data; 965 966 if (hparms->sample_rate == 48000) 967 regmap_write(lt9611->regmap, 0x840f, 0x2b); 968 else if (hparms->sample_rate == 96000) 969 regmap_write(lt9611->regmap, 0x840f, 0xab); 970 else 971 return -EINVAL; 972 973 regmap_write(lt9611->regmap, 0x8435, 0x00); 974 regmap_write(lt9611->regmap, 0x8436, 0x18); 975 regmap_write(lt9611->regmap, 0x8437, 0x00); 976 977 return 0; 978} 979 980static int lt9611_audio_startup(struct device *dev, void *data) 981{ 982 struct lt9611 *lt9611 = data; 983 984 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 985 regmap_write(lt9611->regmap, 0x82d7, 0x04); 986 987 regmap_write(lt9611->regmap, 0x8406, 0x08); 988 regmap_write(lt9611->regmap, 0x8407, 0x10); 989 990 regmap_write(lt9611->regmap, 0x8434, 0xd5); 991 992 return 0; 993} 994 995static void lt9611_audio_shutdown(struct device *dev, void *data) 996{ 997 struct lt9611 *lt9611 = data; 998 999 regmap_write(lt9611->regmap, 0x8406, 0x00); 1000 regmap_write(lt9611->regmap, 0x8407, 0x00); 1001} 1002 1003static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1004 struct device_node *endpoint) 1005{ 1006 struct of_endpoint of_ep; 1007 int ret; 1008 1009 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1010 if (ret < 0) 1011 return ret; 1012 1013 /* 1014 * HDMI sound should be located as reg = <2> 1015 * Then, it is sound port 0 1016 */ 1017 if (of_ep.port == 2) 1018 return 0; 1019 1020 return -EINVAL; 1021} 1022 1023static const struct hdmi_codec_ops lt9611_codec_ops = { 1024 .hw_params = lt9611_hdmi_hw_params, 1025 .audio_shutdown = lt9611_audio_shutdown, 1026 .audio_startup = lt9611_audio_startup, 1027 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1028}; 1029 1030static struct hdmi_codec_pdata codec_data = { 1031 .ops = <9611_codec_ops, 1032 .max_i2s_channels = 8, 1033 .i2s = 1, 1034}; 1035 1036static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1037{ 1038 codec_data.data = lt9611; 1039 lt9611->audio_pdev = 1040 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1041 PLATFORM_DEVID_AUTO, 1042 &codec_data, sizeof(codec_data)); 1043 1044 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1045} 1046 1047static void lt9611_audio_exit(struct lt9611 *lt9611) 1048{ 1049 if (lt9611->audio_pdev) { 1050 platform_device_unregister(lt9611->audio_pdev); 1051 lt9611->audio_pdev = NULL; 1052 } 1053} 1054 1055static int lt9611_probe(struct i2c_client *client) 1056{ 1057 struct lt9611 *lt9611; 1058 struct device *dev = &client->dev; 1059 int ret; 1060 1061 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1062 dev_err(dev, "device doesn't support I2C\n"); 1063 return -ENODEV; 1064 } 1065 1066 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1067 if (!lt9611) 1068 return -ENOMEM; 1069 1070 lt9611->dev = dev; 1071 lt9611->client = client; 1072 lt9611->sleep = false; 1073 1074 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1075 if (IS_ERR(lt9611->regmap)) { 1076 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1077 return PTR_ERR(lt9611->regmap); 1078 } 1079 1080 ret = lt9611_parse_dt(dev, lt9611); 1081 if (ret) { 1082 dev_err(dev, "failed to parse device tree\n"); 1083 return ret; 1084 } 1085 1086 ret = lt9611_gpio_init(lt9611); 1087 if (ret < 0) 1088 goto err_of_put; 1089 1090 ret = lt9611_regulator_init(lt9611); 1091 if (ret < 0) 1092 goto err_of_put; 1093 1094 lt9611_assert_5v(lt9611); 1095 1096 ret = lt9611_regulator_enable(lt9611); 1097 if (ret) 1098 goto err_of_put; 1099 1100 lt9611_reset(lt9611); 1101 1102 ret = lt9611_read_device_rev(lt9611); 1103 if (ret) { 1104 dev_err(dev, "failed to read chip rev\n"); 1105 goto err_disable_regulators; 1106 } 1107 1108 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1109 lt9611_irq_thread_handler, 1110 IRQF_ONESHOT, "lt9611", lt9611); 1111 if (ret) { 1112 dev_err(dev, "failed to request irq\n"); 1113 goto err_disable_regulators; 1114 } 1115 1116 i2c_set_clientdata(client, lt9611); 1117 1118 lt9611->bridge.funcs = <9611_bridge_funcs; 1119 lt9611->bridge.of_node = client->dev.of_node; 1120 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1121 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1122 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1123 1124 drm_bridge_add(<9611->bridge); 1125 1126 /* Attach primary DSI */ 1127 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 1128 if (IS_ERR(lt9611->dsi0)) { 1129 ret = PTR_ERR(lt9611->dsi0); 1130 goto err_remove_bridge; 1131 } 1132 1133 /* Attach secondary DSI, if specified */ 1134 if (lt9611->dsi1_node) { 1135 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 1136 if (IS_ERR(lt9611->dsi1)) { 1137 ret = PTR_ERR(lt9611->dsi1); 1138 goto err_remove_bridge; 1139 } 1140 } 1141 1142 lt9611_enable_hpd_interrupts(lt9611); 1143 1144 ret = lt9611_audio_init(dev, lt9611); 1145 if (ret) 1146 goto err_remove_bridge; 1147 1148 return 0; 1149 1150err_remove_bridge: 1151 drm_bridge_remove(<9611->bridge); 1152 1153err_disable_regulators: 1154 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1155 1156err_of_put: 1157 of_node_put(lt9611->dsi1_node); 1158 of_node_put(lt9611->dsi0_node); 1159 1160 return ret; 1161} 1162 1163static void lt9611_remove(struct i2c_client *client) 1164{ 1165 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1166 1167 disable_irq(client->irq); 1168 lt9611_audio_exit(lt9611); 1169 drm_bridge_remove(<9611->bridge); 1170 1171 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1172 1173 of_node_put(lt9611->dsi1_node); 1174 of_node_put(lt9611->dsi0_node); 1175} 1176 1177static struct i2c_device_id lt9611_id[] = { 1178 { "lontium,lt9611", 0 }, 1179 {} 1180}; 1181MODULE_DEVICE_TABLE(i2c, lt9611_id); 1182 1183static const struct of_device_id lt9611_match_table[] = { 1184 { .compatible = "lontium,lt9611" }, 1185 { } 1186}; 1187MODULE_DEVICE_TABLE(of, lt9611_match_table); 1188 1189static struct i2c_driver lt9611_driver = { 1190 .driver = { 1191 .name = "lt9611", 1192 .of_match_table = lt9611_match_table, 1193 }, 1194 .probe = lt9611_probe, 1195 .remove = lt9611_remove, 1196 .id_table = lt9611_id, 1197}; 1198module_i2c_driver(lt9611_driver); 1199 1200MODULE_LICENSE("GPL v2"); 1201