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 35 struct 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 67 static 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 80 static 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 88 static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) 89 { 90 return container_of(bridge, struct lt9611, bridge); 91 } 92 93 static 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 } 109 110 static 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 } 127 128 static 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 } 172 173 static 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 } 222 223 static 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 } 271 272 static 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 } 287 288 static 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; 330 331 end: 332 dev_err(lt9611->dev, "read video check error\n"); 333 return temp; 334 } 335 336 static 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; 374 375 out: 376 regmap_write(lt9611->regmap, 0x843d, iframes); /* UD1 infoframe */ 377 } 378 379 static 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 } 387 388 static 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 } 413 414 static 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 } 453 454 static 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 } 465 466 static 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 } 484 485 static 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 } 522 523 static 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 } 533 534 static 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 } 545 546 static 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 } 554 555 static 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 } 568 569 static 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 } 587 588 static 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 } 602 603 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 /* bridge funcs */ 685 static void 686 lt9611_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 } 733 734 static void 735 lt9611_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 } 753 754 static 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 return ERR_PTR(dev_err_probe(lt9611->dev, -EPROBE_DEFER, "failed to find dsi host\n")); 766 767 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 768 if (IS_ERR(dsi)) { 769 dev_err(lt9611->dev, "failed to create dsi device\n"); 770 return dsi; 771 } 772 773 dsi->lanes = 4; 774 dsi->format = MIPI_DSI_FMT_RGB888; 775 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 776 MIPI_DSI_MODE_VIDEO_HSE; 777 778 ret = devm_mipi_dsi_attach(dev, dsi); 779 if (ret < 0) { 780 dev_err(dev, "failed to attach dsi to host\n"); 781 return ERR_PTR(ret); 782 } 783 784 return dsi; 785 } 786 787 static int lt9611_bridge_attach(struct drm_bridge *bridge, 788 enum drm_bridge_attach_flags flags) 789 { 790 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 791 792 return drm_bridge_attach(bridge->encoder, lt9611->next_bridge, 793 bridge, flags); 794 } 795 796 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, 797 const struct drm_display_info *info, 798 const struct drm_display_mode *mode) 799 { 800 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 801 802 if (mode->hdisplay > 3840) 803 return MODE_BAD_HVALUE; 804 805 if (mode->vdisplay > 2160) 806 return MODE_BAD_VVALUE; 807 808 if (mode->hdisplay == 3840 && 809 mode->vdisplay == 2160 && 810 drm_mode_vrefresh(mode) > 30) 811 return MODE_CLOCK_HIGH; 812 813 if (mode->hdisplay > 2000 && !lt9611->dsi1_node) 814 return MODE_PANEL; 815 else 816 return MODE_OK; 817 } 818 819 static void lt9611_bridge_atomic_pre_enable(struct drm_bridge *bridge, 820 struct drm_bridge_state *old_bridge_state) 821 { 822 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 823 static const struct reg_sequence reg_cfg[] = { 824 { 0x8102, 0x12 }, 825 { 0x8123, 0x40 }, 826 { 0x8130, 0xea }, 827 { 0x8011, 0xfa }, 828 }; 829 830 if (!lt9611->sleep) 831 return; 832 833 regmap_multi_reg_write(lt9611->regmap, 834 reg_cfg, ARRAY_SIZE(reg_cfg)); 835 836 lt9611->sleep = false; 837 } 838 839 static void 840 lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge, 841 struct drm_bridge_state *old_bridge_state) 842 { 843 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 844 845 lt9611_sleep_setup(lt9611); 846 } 847 848 static const struct drm_edid *lt9611_bridge_edid_read(struct drm_bridge *bridge, 849 struct drm_connector *connector) 850 { 851 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 852 853 lt9611_power_on(lt9611); 854 return drm_edid_read_custom(connector, lt9611_get_edid_block, lt9611); 855 } 856 857 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge) 858 { 859 struct lt9611 *lt9611 = bridge_to_lt9611(bridge); 860 861 lt9611_enable_hpd_interrupts(lt9611); 862 } 863 864 #define MAX_INPUT_SEL_FORMATS 1 865 866 static u32 * 867 lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 868 struct drm_bridge_state *bridge_state, 869 struct drm_crtc_state *crtc_state, 870 struct drm_connector_state *conn_state, 871 u32 output_fmt, 872 unsigned int *num_input_fmts) 873 { 874 u32 *input_fmts; 875 876 *num_input_fmts = 0; 877 878 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), 879 GFP_KERNEL); 880 if (!input_fmts) 881 return NULL; 882 883 /* This is the DSI-end bus format */ 884 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; 885 *num_input_fmts = 1; 886 887 return input_fmts; 888 } 889 890 static const struct drm_bridge_funcs lt9611_bridge_funcs = { 891 .attach = lt9611_bridge_attach, 892 .mode_valid = lt9611_bridge_mode_valid, 893 .detect = lt9611_bridge_detect, 894 .edid_read = lt9611_bridge_edid_read, 895 .hpd_enable = lt9611_bridge_hpd_enable, 896 897 .atomic_pre_enable = lt9611_bridge_atomic_pre_enable, 898 .atomic_enable = lt9611_bridge_atomic_enable, 899 .atomic_disable = lt9611_bridge_atomic_disable, 900 .atomic_post_disable = lt9611_bridge_atomic_post_disable, 901 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 902 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 903 .atomic_reset = drm_atomic_helper_bridge_reset, 904 .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts, 905 }; 906 907 static int lt9611_parse_dt(struct device *dev, 908 struct lt9611 *lt9611) 909 { 910 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 911 if (!lt9611->dsi0_node) { 912 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n"); 913 return -ENODEV; 914 } 915 916 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 917 918 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); 919 920 return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, <9611->next_bridge); 921 } 922 923 static int lt9611_gpio_init(struct lt9611 *lt9611) 924 { 925 struct device *dev = lt9611->dev; 926 927 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 928 if (IS_ERR(lt9611->reset_gpio)) { 929 dev_err(dev, "failed to acquire reset gpio\n"); 930 return PTR_ERR(lt9611->reset_gpio); 931 } 932 933 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", 934 GPIOD_OUT_LOW); 935 if (IS_ERR(lt9611->enable_gpio)) { 936 dev_err(dev, "failed to acquire enable gpio\n"); 937 return PTR_ERR(lt9611->enable_gpio); 938 } 939 940 return 0; 941 } 942 943 static int lt9611_read_device_rev(struct lt9611 *lt9611) 944 { 945 unsigned int rev; 946 int ret; 947 948 regmap_write(lt9611->regmap, 0x80ee, 0x01); 949 ret = regmap_read(lt9611->regmap, 0x8002, &rev); 950 if (ret) 951 dev_err(lt9611->dev, "failed to read revision: %d\n", ret); 952 else 953 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); 954 955 return ret; 956 } 957 958 static int lt9611_hdmi_hw_params(struct device *dev, void *data, 959 struct hdmi_codec_daifmt *fmt, 960 struct hdmi_codec_params *hparms) 961 { 962 struct lt9611 *lt9611 = data; 963 964 if (hparms->sample_rate == 48000) 965 regmap_write(lt9611->regmap, 0x840f, 0x2b); 966 else if (hparms->sample_rate == 96000) 967 regmap_write(lt9611->regmap, 0x840f, 0xab); 968 else 969 return -EINVAL; 970 971 regmap_write(lt9611->regmap, 0x8435, 0x00); 972 regmap_write(lt9611->regmap, 0x8436, 0x18); 973 regmap_write(lt9611->regmap, 0x8437, 0x00); 974 975 return 0; 976 } 977 978 static int lt9611_audio_startup(struct device *dev, void *data) 979 { 980 struct lt9611 *lt9611 = data; 981 982 regmap_write(lt9611->regmap, 0x82d6, 0x8c); 983 regmap_write(lt9611->regmap, 0x82d7, 0x04); 984 985 regmap_write(lt9611->regmap, 0x8406, 0x08); 986 regmap_write(lt9611->regmap, 0x8407, 0x10); 987 988 regmap_write(lt9611->regmap, 0x8434, 0xd5); 989 990 return 0; 991 } 992 993 static void lt9611_audio_shutdown(struct device *dev, void *data) 994 { 995 struct lt9611 *lt9611 = data; 996 997 regmap_write(lt9611->regmap, 0x8406, 0x00); 998 regmap_write(lt9611->regmap, 0x8407, 0x00); 999 } 1000 1001 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1002 struct device_node *endpoint) 1003 { 1004 struct of_endpoint of_ep; 1005 int ret; 1006 1007 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1008 if (ret < 0) 1009 return ret; 1010 1011 /* 1012 * HDMI sound should be located as reg = <2> 1013 * Then, it is sound port 0 1014 */ 1015 if (of_ep.port == 2) 1016 return 0; 1017 1018 return -EINVAL; 1019 } 1020 1021 static const struct hdmi_codec_ops lt9611_codec_ops = { 1022 .hw_params = lt9611_hdmi_hw_params, 1023 .audio_shutdown = lt9611_audio_shutdown, 1024 .audio_startup = lt9611_audio_startup, 1025 .get_dai_id = lt9611_hdmi_i2s_get_dai_id, 1026 }; 1027 1028 static struct hdmi_codec_pdata codec_data = { 1029 .ops = <9611_codec_ops, 1030 .max_i2s_channels = 8, 1031 .i2s = 1, 1032 }; 1033 1034 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611) 1035 { 1036 codec_data.data = lt9611; 1037 lt9611->audio_pdev = 1038 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 1039 PLATFORM_DEVID_AUTO, 1040 &codec_data, sizeof(codec_data)); 1041 1042 return PTR_ERR_OR_ZERO(lt9611->audio_pdev); 1043 } 1044 1045 static void lt9611_audio_exit(struct lt9611 *lt9611) 1046 { 1047 if (lt9611->audio_pdev) { 1048 platform_device_unregister(lt9611->audio_pdev); 1049 lt9611->audio_pdev = NULL; 1050 } 1051 } 1052 1053 static int lt9611_probe(struct i2c_client *client) 1054 { 1055 struct lt9611 *lt9611; 1056 struct device *dev = &client->dev; 1057 int ret; 1058 1059 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1060 dev_err(dev, "device doesn't support I2C\n"); 1061 return -ENODEV; 1062 } 1063 1064 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); 1065 if (!lt9611) 1066 return -ENOMEM; 1067 1068 lt9611->dev = dev; 1069 lt9611->client = client; 1070 lt9611->sleep = false; 1071 1072 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); 1073 if (IS_ERR(lt9611->regmap)) { 1074 dev_err(lt9611->dev, "regmap i2c init failed\n"); 1075 return PTR_ERR(lt9611->regmap); 1076 } 1077 1078 ret = lt9611_parse_dt(dev, lt9611); 1079 if (ret) { 1080 dev_err(dev, "failed to parse device tree\n"); 1081 return ret; 1082 } 1083 1084 ret = lt9611_gpio_init(lt9611); 1085 if (ret < 0) 1086 goto err_of_put; 1087 1088 ret = lt9611_regulator_init(lt9611); 1089 if (ret < 0) 1090 goto err_of_put; 1091 1092 lt9611_assert_5v(lt9611); 1093 1094 ret = lt9611_regulator_enable(lt9611); 1095 if (ret) 1096 goto err_of_put; 1097 1098 lt9611_reset(lt9611); 1099 1100 ret = lt9611_read_device_rev(lt9611); 1101 if (ret) { 1102 dev_err(dev, "failed to read chip rev\n"); 1103 goto err_disable_regulators; 1104 } 1105 1106 ret = devm_request_threaded_irq(dev, client->irq, NULL, 1107 lt9611_irq_thread_handler, 1108 IRQF_ONESHOT, "lt9611", lt9611); 1109 if (ret) { 1110 dev_err(dev, "failed to request irq\n"); 1111 goto err_disable_regulators; 1112 } 1113 1114 i2c_set_clientdata(client, lt9611); 1115 1116 lt9611->bridge.funcs = <9611_bridge_funcs; 1117 lt9611->bridge.of_node = client->dev.of_node; 1118 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | 1119 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES; 1120 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 1121 1122 drm_bridge_add(<9611->bridge); 1123 1124 /* Attach primary DSI */ 1125 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); 1126 if (IS_ERR(lt9611->dsi0)) { 1127 ret = PTR_ERR(lt9611->dsi0); 1128 goto err_remove_bridge; 1129 } 1130 1131 /* Attach secondary DSI, if specified */ 1132 if (lt9611->dsi1_node) { 1133 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); 1134 if (IS_ERR(lt9611->dsi1)) { 1135 ret = PTR_ERR(lt9611->dsi1); 1136 goto err_remove_bridge; 1137 } 1138 } 1139 1140 lt9611_enable_hpd_interrupts(lt9611); 1141 1142 ret = lt9611_audio_init(dev, lt9611); 1143 if (ret) 1144 goto err_remove_bridge; 1145 1146 return 0; 1147 1148 err_remove_bridge: 1149 drm_bridge_remove(<9611->bridge); 1150 1151 err_disable_regulators: 1152 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1153 1154 err_of_put: 1155 of_node_put(lt9611->dsi1_node); 1156 of_node_put(lt9611->dsi0_node); 1157 1158 return ret; 1159 } 1160 1161 static void lt9611_remove(struct i2c_client *client) 1162 { 1163 struct lt9611 *lt9611 = i2c_get_clientdata(client); 1164 1165 disable_irq(client->irq); 1166 lt9611_audio_exit(lt9611); 1167 drm_bridge_remove(<9611->bridge); 1168 1169 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); 1170 1171 of_node_put(lt9611->dsi1_node); 1172 of_node_put(lt9611->dsi0_node); 1173 } 1174 1175 static struct i2c_device_id lt9611_id[] = { 1176 { "lontium,lt9611", 0 }, 1177 {} 1178 }; 1179 MODULE_DEVICE_TABLE(i2c, lt9611_id); 1180 1181 static const struct of_device_id lt9611_match_table[] = { 1182 { .compatible = "lontium,lt9611" }, 1183 { } 1184 }; 1185 MODULE_DEVICE_TABLE(of, lt9611_match_table); 1186 1187 static struct i2c_driver lt9611_driver = { 1188 .driver = { 1189 .name = "lt9611", 1190 .of_match_table = lt9611_match_table, 1191 }, 1192 .probe = lt9611_probe, 1193 .remove = lt9611_remove, 1194 .id_table = lt9611_id, 1195 }; 1196 module_i2c_driver(lt9611_driver); 1197 1198 MODULE_LICENSE("GPL v2"); 1199