1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Silicon Image SiI8620 HDMI/MHL bridge driver 4 * 5 * Copyright (C) 2015, Samsung Electronics Co., Ltd. 6 * Andrzej Hajda <a.hajda@samsung.com> 7 */ 8 9 #include <asm/unaligned.h> 10 11 #include <drm/bridge/mhl.h> 12 #include <drm/drm_bridge.h> 13 #include <drm/drm_crtc.h> 14 #include <drm/drm_edid.h> 15 #include <drm/drm_encoder.h> 16 17 #include <linux/clk.h> 18 #include <linux/delay.h> 19 #include <linux/extcon.h> 20 #include <linux/gpio/consumer.h> 21 #include <linux/i2c.h> 22 #include <linux/interrupt.h> 23 #include <linux/irq.h> 24 #include <linux/kernel.h> 25 #include <linux/list.h> 26 #include <linux/module.h> 27 #include <linux/mutex.h> 28 #include <linux/of_graph.h> 29 #include <linux/regulator/consumer.h> 30 #include <linux/slab.h> 31 32 #include <media/rc-core.h> 33 34 #include "sil-sii8620.h" 35 36 #define SII8620_BURST_BUF_LEN 288 37 #define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3) 38 39 #define MHL1_MAX_PCLK 75000 40 #define MHL1_MAX_PCLK_PP_MODE 150000 41 #define MHL3_MAX_PCLK 200000 42 #define MHL3_MAX_PCLK_PP_MODE 300000 43 44 enum sii8620_mode { 45 CM_DISCONNECTED, 46 CM_DISCOVERY, 47 CM_MHL1, 48 CM_MHL3, 49 CM_ECBUS_S 50 }; 51 52 enum sii8620_sink_type { 53 SINK_NONE, 54 SINK_HDMI, 55 SINK_DVI 56 }; 57 58 enum sii8620_mt_state { 59 MT_STATE_READY, 60 MT_STATE_BUSY, 61 MT_STATE_DONE 62 }; 63 64 struct sii8620 { 65 struct drm_bridge bridge; 66 struct device *dev; 67 struct rc_dev *rc_dev; 68 struct clk *clk_xtal; 69 struct gpio_desc *gpio_reset; 70 struct gpio_desc *gpio_int; 71 struct regulator_bulk_data supplies[2]; 72 struct mutex lock; /* context lock, protects fields below */ 73 int error; 74 unsigned int use_packed_pixel:1; 75 enum sii8620_mode mode; 76 enum sii8620_sink_type sink_type; 77 u8 cbus_status; 78 u8 stat[MHL_DST_SIZE]; 79 u8 xstat[MHL_XDS_SIZE]; 80 u8 devcap[MHL_DCAP_SIZE]; 81 u8 xdevcap[MHL_XDC_SIZE]; 82 bool feature_complete; 83 bool devcap_read; 84 bool sink_detected; 85 struct edid *edid; 86 unsigned int gen2_write_burst:1; 87 enum sii8620_mt_state mt_state; 88 struct extcon_dev *extcon; 89 struct notifier_block extcon_nb; 90 struct work_struct extcon_wq; 91 int cable_state; 92 struct list_head mt_queue; 93 struct { 94 int r_size; 95 int r_count; 96 int rx_ack; 97 int rx_count; 98 u8 rx_buf[32]; 99 int tx_count; 100 u8 tx_buf[32]; 101 } burst; 102 }; 103 104 struct sii8620_mt_msg; 105 106 typedef void (*sii8620_mt_msg_cb)(struct sii8620 *ctx, 107 struct sii8620_mt_msg *msg); 108 109 typedef void (*sii8620_cb)(struct sii8620 *ctx, int ret); 110 111 struct sii8620_mt_msg { 112 struct list_head node; 113 u8 reg[4]; 114 u8 ret; 115 sii8620_mt_msg_cb send; 116 sii8620_mt_msg_cb recv; 117 sii8620_cb continuation; 118 }; 119 120 static const u8 sii8620_i2c_page[] = { 121 0x39, /* Main System */ 122 0x3d, /* TDM and HSIC */ 123 0x49, /* TMDS Receiver, MHL EDID */ 124 0x4d, /* eMSC, HDCP, HSIC */ 125 0x5d, /* MHL Spec */ 126 0x64, /* MHL CBUS */ 127 0x59, /* Hardware TPI (Transmitter Programming Interface) */ 128 0x61, /* eCBUS-S, eCBUS-D */ 129 }; 130 131 static void sii8620_fetch_edid(struct sii8620 *ctx); 132 static void sii8620_set_upstream_edid(struct sii8620 *ctx); 133 static void sii8620_enable_hpd(struct sii8620 *ctx); 134 static void sii8620_mhl_disconnected(struct sii8620 *ctx); 135 static void sii8620_disconnect(struct sii8620 *ctx); 136 137 static int sii8620_clear_error(struct sii8620 *ctx) 138 { 139 int ret = ctx->error; 140 141 ctx->error = 0; 142 return ret; 143 } 144 145 static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len) 146 { 147 struct device *dev = ctx->dev; 148 struct i2c_client *client = to_i2c_client(dev); 149 u8 data = addr; 150 struct i2c_msg msg[] = { 151 { 152 .addr = sii8620_i2c_page[addr >> 8], 153 .flags = client->flags, 154 .len = 1, 155 .buf = &data 156 }, 157 { 158 .addr = sii8620_i2c_page[addr >> 8], 159 .flags = client->flags | I2C_M_RD, 160 .len = len, 161 .buf = buf 162 }, 163 }; 164 int ret; 165 166 if (ctx->error) 167 return; 168 169 ret = i2c_transfer(client->adapter, msg, 2); 170 dev_dbg(dev, "read at %04x: %*ph, %d\n", addr, len, buf, ret); 171 172 if (ret != 2) { 173 dev_err(dev, "Read at %#06x of %d bytes failed with code %d.\n", 174 addr, len, ret); 175 ctx->error = ret < 0 ? ret : -EIO; 176 } 177 } 178 179 static u8 sii8620_readb(struct sii8620 *ctx, u16 addr) 180 { 181 u8 ret; 182 183 sii8620_read_buf(ctx, addr, &ret, 1); 184 return ret; 185 } 186 187 static void sii8620_write_buf(struct sii8620 *ctx, u16 addr, const u8 *buf, 188 int len) 189 { 190 struct device *dev = ctx->dev; 191 struct i2c_client *client = to_i2c_client(dev); 192 u8 data[2]; 193 struct i2c_msg msg = { 194 .addr = sii8620_i2c_page[addr >> 8], 195 .flags = client->flags, 196 .len = len + 1, 197 }; 198 int ret; 199 200 if (ctx->error) 201 return; 202 203 if (len > 1) { 204 msg.buf = kmalloc(len + 1, GFP_KERNEL); 205 if (!msg.buf) { 206 ctx->error = -ENOMEM; 207 return; 208 } 209 memcpy(msg.buf + 1, buf, len); 210 } else { 211 msg.buf = data; 212 msg.buf[1] = *buf; 213 } 214 215 msg.buf[0] = addr; 216 217 ret = i2c_transfer(client->adapter, &msg, 1); 218 dev_dbg(dev, "write at %04x: %*ph, %d\n", addr, len, buf, ret); 219 220 if (ret != 1) { 221 dev_err(dev, "Write at %#06x of %*ph failed with code %d.\n", 222 addr, len, buf, ret); 223 ctx->error = ret ?: -EIO; 224 } 225 226 if (len > 1) 227 kfree(msg.buf); 228 } 229 230 #define sii8620_write(ctx, addr, arr...) \ 231 ({\ 232 u8 d[] = { arr }; \ 233 sii8620_write_buf(ctx, addr, d, ARRAY_SIZE(d)); \ 234 }) 235 236 static void __sii8620_write_seq(struct sii8620 *ctx, const u16 *seq, int len) 237 { 238 int i; 239 240 for (i = 0; i < len; i += 2) 241 sii8620_write(ctx, seq[i], seq[i + 1]); 242 } 243 244 #define sii8620_write_seq(ctx, seq...) \ 245 ({\ 246 const u16 d[] = { seq }; \ 247 __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \ 248 }) 249 250 #define sii8620_write_seq_static(ctx, seq...) \ 251 ({\ 252 static const u16 d[] = { seq }; \ 253 __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \ 254 }) 255 256 static void sii8620_setbits(struct sii8620 *ctx, u16 addr, u8 mask, u8 val) 257 { 258 val = (val & mask) | (sii8620_readb(ctx, addr) & ~mask); 259 sii8620_write(ctx, addr, val); 260 } 261 262 static inline bool sii8620_is_mhl3(struct sii8620 *ctx) 263 { 264 return ctx->mode >= CM_MHL3; 265 } 266 267 static void sii8620_mt_cleanup(struct sii8620 *ctx) 268 { 269 struct sii8620_mt_msg *msg, *n; 270 271 list_for_each_entry_safe(msg, n, &ctx->mt_queue, node) { 272 list_del(&msg->node); 273 kfree(msg); 274 } 275 ctx->mt_state = MT_STATE_READY; 276 } 277 278 static void sii8620_mt_work(struct sii8620 *ctx) 279 { 280 struct sii8620_mt_msg *msg; 281 282 if (ctx->error) 283 return; 284 if (ctx->mt_state == MT_STATE_BUSY || list_empty(&ctx->mt_queue)) 285 return; 286 287 if (ctx->mt_state == MT_STATE_DONE) { 288 ctx->mt_state = MT_STATE_READY; 289 msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, 290 node); 291 list_del(&msg->node); 292 if (msg->recv) 293 msg->recv(ctx, msg); 294 if (msg->continuation) 295 msg->continuation(ctx, msg->ret); 296 kfree(msg); 297 } 298 299 if (ctx->mt_state != MT_STATE_READY || list_empty(&ctx->mt_queue)) 300 return; 301 302 ctx->mt_state = MT_STATE_BUSY; 303 msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node); 304 if (msg->send) 305 msg->send(ctx, msg); 306 } 307 308 static void sii8620_enable_gen2_write_burst(struct sii8620 *ctx) 309 { 310 u8 ctrl = BIT_MDT_RCV_CTRL_MDT_RCV_EN; 311 312 if (ctx->gen2_write_burst) 313 return; 314 315 if (ctx->mode >= CM_MHL1) 316 ctrl |= BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN; 317 318 sii8620_write_seq(ctx, 319 REG_MDT_RCV_TIMEOUT, 100, 320 REG_MDT_RCV_CTRL, ctrl 321 ); 322 ctx->gen2_write_burst = 1; 323 } 324 325 static void sii8620_disable_gen2_write_burst(struct sii8620 *ctx) 326 { 327 if (!ctx->gen2_write_burst) 328 return; 329 330 sii8620_write_seq_static(ctx, 331 REG_MDT_XMIT_CTRL, 0, 332 REG_MDT_RCV_CTRL, 0 333 ); 334 ctx->gen2_write_burst = 0; 335 } 336 337 static void sii8620_start_gen2_write_burst(struct sii8620 *ctx) 338 { 339 sii8620_write_seq_static(ctx, 340 REG_MDT_INT_1_MASK, BIT_MDT_RCV_TIMEOUT 341 | BIT_MDT_RCV_SM_ABORT_PKT_RCVD | BIT_MDT_RCV_SM_ERROR 342 | BIT_MDT_XMIT_TIMEOUT | BIT_MDT_XMIT_SM_ABORT_PKT_RCVD 343 | BIT_MDT_XMIT_SM_ERROR, 344 REG_MDT_INT_0_MASK, BIT_MDT_XFIFO_EMPTY 345 | BIT_MDT_IDLE_AFTER_HAWB_DISABLE 346 | BIT_MDT_RFIFO_DATA_RDY 347 ); 348 sii8620_enable_gen2_write_burst(ctx); 349 } 350 351 static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx, 352 struct sii8620_mt_msg *msg) 353 { 354 if (msg->reg[0] == MHL_SET_INT && 355 msg->reg[1] == MHL_INT_REG(RCHANGE) && 356 msg->reg[2] == MHL_INT_RC_FEAT_REQ) 357 sii8620_enable_gen2_write_burst(ctx); 358 else 359 sii8620_disable_gen2_write_burst(ctx); 360 361 switch (msg->reg[0]) { 362 case MHL_WRITE_STAT: 363 case MHL_SET_INT: 364 sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2); 365 sii8620_write(ctx, REG_MSC_COMMAND_START, 366 BIT_MSC_COMMAND_START_WRITE_STAT); 367 break; 368 case MHL_MSC_MSG: 369 sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3); 370 sii8620_write(ctx, REG_MSC_COMMAND_START, 371 BIT_MSC_COMMAND_START_MSC_MSG); 372 break; 373 case MHL_READ_DEVCAP_REG: 374 case MHL_READ_XDEVCAP_REG: 375 sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]); 376 sii8620_write(ctx, REG_MSC_COMMAND_START, 377 BIT_MSC_COMMAND_START_READ_DEVCAP); 378 break; 379 default: 380 dev_err(ctx->dev, "%s: command %#x not supported\n", __func__, 381 msg->reg[0]); 382 } 383 } 384 385 static struct sii8620_mt_msg *sii8620_mt_msg_new(struct sii8620 *ctx) 386 { 387 struct sii8620_mt_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL); 388 389 if (!msg) 390 ctx->error = -ENOMEM; 391 else 392 list_add_tail(&msg->node, &ctx->mt_queue); 393 394 return msg; 395 } 396 397 static void sii8620_mt_set_cont(struct sii8620 *ctx, sii8620_cb cont) 398 { 399 struct sii8620_mt_msg *msg; 400 401 if (ctx->error) 402 return; 403 404 if (list_empty(&ctx->mt_queue)) { 405 ctx->error = -EINVAL; 406 return; 407 } 408 msg = list_last_entry(&ctx->mt_queue, struct sii8620_mt_msg, node); 409 msg->continuation = cont; 410 } 411 412 static void sii8620_mt_msc_cmd(struct sii8620 *ctx, u8 cmd, u8 arg1, u8 arg2) 413 { 414 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx); 415 416 if (!msg) 417 return; 418 419 msg->reg[0] = cmd; 420 msg->reg[1] = arg1; 421 msg->reg[2] = arg2; 422 msg->send = sii8620_mt_msc_cmd_send; 423 } 424 425 static void sii8620_mt_write_stat(struct sii8620 *ctx, u8 reg, u8 val) 426 { 427 sii8620_mt_msc_cmd(ctx, MHL_WRITE_STAT, reg, val); 428 } 429 430 static inline void sii8620_mt_set_int(struct sii8620 *ctx, u8 irq, u8 mask) 431 { 432 sii8620_mt_msc_cmd(ctx, MHL_SET_INT, irq, mask); 433 } 434 435 static void sii8620_mt_msc_msg(struct sii8620 *ctx, u8 cmd, u8 data) 436 { 437 sii8620_mt_msc_cmd(ctx, MHL_MSC_MSG, cmd, data); 438 } 439 440 static void sii8620_mt_rap(struct sii8620 *ctx, u8 code) 441 { 442 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code); 443 } 444 445 static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code) 446 { 447 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code); 448 } 449 450 static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code) 451 { 452 sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code); 453 } 454 455 static void sii8620_mt_read_devcap_send(struct sii8620 *ctx, 456 struct sii8620_mt_msg *msg) 457 { 458 u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP 459 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO 460 | BIT_EDID_CTRL_EDID_MODE_EN; 461 462 if (msg->reg[0] == MHL_READ_XDEVCAP) 463 ctrl |= BIT_EDID_CTRL_XDEVCAP_EN; 464 465 sii8620_write_seq(ctx, 466 REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE, 467 REG_EDID_CTRL, ctrl, 468 REG_TPI_CBUS_START, BIT_TPI_CBUS_START_GET_DEVCAP_START 469 ); 470 } 471 472 /* copy src to dst and set changed bits in src */ 473 static void sii8620_update_array(u8 *dst, u8 *src, int count) 474 { 475 while (--count >= 0) { 476 *src ^= *dst; 477 *dst++ ^= *src++; 478 } 479 } 480 481 static void sii8620_identify_sink(struct sii8620 *ctx) 482 { 483 static const char * const sink_str[] = { 484 [SINK_NONE] = "NONE", 485 [SINK_HDMI] = "HDMI", 486 [SINK_DVI] = "DVI" 487 }; 488 489 char sink_name[20]; 490 struct device *dev = ctx->dev; 491 492 if (!ctx->sink_detected || !ctx->devcap_read) 493 return; 494 495 sii8620_fetch_edid(ctx); 496 if (!ctx->edid) { 497 dev_err(ctx->dev, "Cannot fetch EDID\n"); 498 sii8620_mhl_disconnected(ctx); 499 return; 500 } 501 sii8620_set_upstream_edid(ctx); 502 503 if (drm_detect_hdmi_monitor(ctx->edid)) 504 ctx->sink_type = SINK_HDMI; 505 else 506 ctx->sink_type = SINK_DVI; 507 508 drm_edid_get_monitor_name(ctx->edid, sink_name, ARRAY_SIZE(sink_name)); 509 510 dev_info(dev, "detected sink(type: %s): %s\n", 511 sink_str[ctx->sink_type], sink_name); 512 } 513 514 static void sii8620_mr_devcap(struct sii8620 *ctx) 515 { 516 u8 dcap[MHL_DCAP_SIZE]; 517 struct device *dev = ctx->dev; 518 519 sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, dcap, MHL_DCAP_SIZE); 520 if (ctx->error < 0) 521 return; 522 523 dev_info(dev, "detected dongle MHL %d.%d, ChipID %02x%02x:%02x%02x\n", 524 dcap[MHL_DCAP_MHL_VERSION] / 16, 525 dcap[MHL_DCAP_MHL_VERSION] % 16, 526 dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L], 527 dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]); 528 sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE); 529 ctx->devcap_read = true; 530 sii8620_identify_sink(ctx); 531 } 532 533 static void sii8620_mr_xdevcap(struct sii8620 *ctx) 534 { 535 sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, ctx->xdevcap, 536 MHL_XDC_SIZE); 537 } 538 539 static void sii8620_mt_read_devcap_recv(struct sii8620 *ctx, 540 struct sii8620_mt_msg *msg) 541 { 542 u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP 543 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO 544 | BIT_EDID_CTRL_EDID_MODE_EN; 545 546 if (msg->reg[0] == MHL_READ_XDEVCAP) 547 ctrl |= BIT_EDID_CTRL_XDEVCAP_EN; 548 549 sii8620_write_seq(ctx, 550 REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE | BIT_INTR9_EDID_DONE 551 | BIT_INTR9_EDID_ERROR, 552 REG_EDID_CTRL, ctrl, 553 REG_EDID_FIFO_ADDR, 0 554 ); 555 556 if (msg->reg[0] == MHL_READ_XDEVCAP) 557 sii8620_mr_xdevcap(ctx); 558 else 559 sii8620_mr_devcap(ctx); 560 } 561 562 static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap) 563 { 564 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx); 565 566 if (!msg) 567 return; 568 569 msg->reg[0] = xdevcap ? MHL_READ_XDEVCAP : MHL_READ_DEVCAP; 570 msg->send = sii8620_mt_read_devcap_send; 571 msg->recv = sii8620_mt_read_devcap_recv; 572 } 573 574 static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx, 575 struct sii8620_mt_msg *msg) 576 { 577 u8 reg = msg->reg[1] & 0x7f; 578 579 if (msg->reg[1] & 0x80) 580 ctx->xdevcap[reg] = msg->ret; 581 else 582 ctx->devcap[reg] = msg->ret; 583 } 584 585 static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg) 586 { 587 struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx); 588 589 if (!msg) 590 return; 591 592 msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG; 593 msg->reg[1] = reg; 594 msg->send = sii8620_mt_msc_cmd_send; 595 msg->recv = sii8620_mt_read_devcap_reg_recv; 596 } 597 598 static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg) 599 { 600 sii8620_mt_read_devcap_reg(ctx, reg | 0x80); 601 } 602 603 static void *sii8620_burst_get_tx_buf(struct sii8620 *ctx, int len) 604 { 605 u8 *buf = &ctx->burst.tx_buf[ctx->burst.tx_count]; 606 int size = len + 2; 607 608 if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) { 609 dev_err(ctx->dev, "TX-BLK buffer exhausted\n"); 610 ctx->error = -EINVAL; 611 return NULL; 612 } 613 614 ctx->burst.tx_count += size; 615 buf[1] = len; 616 617 return buf + 2; 618 } 619 620 static u8 *sii8620_burst_get_rx_buf(struct sii8620 *ctx, int len) 621 { 622 u8 *buf = &ctx->burst.rx_buf[ctx->burst.rx_count]; 623 int size = len + 1; 624 625 if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) { 626 dev_err(ctx->dev, "RX-BLK buffer exhausted\n"); 627 ctx->error = -EINVAL; 628 return NULL; 629 } 630 631 ctx->burst.rx_count += size; 632 buf[0] = len; 633 634 return buf + 1; 635 } 636 637 static void sii8620_burst_send(struct sii8620 *ctx) 638 { 639 int tx_left = ctx->burst.tx_count; 640 u8 *d = ctx->burst.tx_buf; 641 642 while (tx_left > 0) { 643 int len = d[1] + 2; 644 645 if (ctx->burst.r_count + len > ctx->burst.r_size) 646 break; 647 d[0] = min(ctx->burst.rx_ack, 255); 648 ctx->burst.rx_ack -= d[0]; 649 sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, d, len); 650 ctx->burst.r_count += len; 651 tx_left -= len; 652 d += len; 653 } 654 655 ctx->burst.tx_count = tx_left; 656 657 while (ctx->burst.rx_ack > 0) { 658 u8 b[2] = { min(ctx->burst.rx_ack, 255), 0 }; 659 660 if (ctx->burst.r_count + 2 > ctx->burst.r_size) 661 break; 662 ctx->burst.rx_ack -= b[0]; 663 sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, b, 2); 664 ctx->burst.r_count += 2; 665 } 666 } 667 668 static void sii8620_burst_receive(struct sii8620 *ctx) 669 { 670 u8 buf[3], *d; 671 int count; 672 673 sii8620_read_buf(ctx, REG_EMSCRFIFOBCNTL, buf, 2); 674 count = get_unaligned_le16(buf); 675 while (count > 0) { 676 int len = min(count, 3); 677 678 sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, buf, len); 679 count -= len; 680 ctx->burst.rx_ack += len - 1; 681 ctx->burst.r_count -= buf[1]; 682 if (ctx->burst.r_count < 0) 683 ctx->burst.r_count = 0; 684 685 if (len < 3 || !buf[2]) 686 continue; 687 688 len = buf[2]; 689 d = sii8620_burst_get_rx_buf(ctx, len); 690 if (!d) 691 continue; 692 sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, d, len); 693 count -= len; 694 ctx->burst.rx_ack += len; 695 } 696 } 697 698 static void sii8620_burst_tx_rbuf_info(struct sii8620 *ctx, int size) 699 { 700 struct mhl_burst_blk_rcv_buffer_info *d = 701 sii8620_burst_get_tx_buf(ctx, sizeof(*d)); 702 if (!d) 703 return; 704 705 d->id = cpu_to_be16(MHL_BURST_ID_BLK_RCV_BUFFER_INFO); 706 d->size = cpu_to_le16(size); 707 } 708 709 static u8 sii8620_checksum(void *ptr, int size) 710 { 711 u8 *d = ptr, sum = 0; 712 713 while (size--) 714 sum += *d++; 715 716 return sum; 717 } 718 719 static void sii8620_mhl_burst_hdr_set(struct mhl3_burst_header *h, 720 enum mhl_burst_id id) 721 { 722 h->id = cpu_to_be16(id); 723 h->total_entries = 1; 724 h->sequence_index = 1; 725 } 726 727 static void sii8620_burst_tx_bits_per_pixel_fmt(struct sii8620 *ctx, u8 fmt) 728 { 729 struct mhl_burst_bits_per_pixel_fmt *d; 730 const int size = sizeof(*d) + sizeof(d->desc[0]); 731 732 d = sii8620_burst_get_tx_buf(ctx, size); 733 if (!d) 734 return; 735 736 sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_BITS_PER_PIXEL_FMT); 737 d->num_entries = 1; 738 d->desc[0].stream_id = 0; 739 d->desc[0].pixel_format = fmt; 740 d->hdr.checksum -= sii8620_checksum(d, size); 741 } 742 743 static void sii8620_burst_rx_all(struct sii8620 *ctx) 744 { 745 u8 *d = ctx->burst.rx_buf; 746 int count = ctx->burst.rx_count; 747 748 while (count-- > 0) { 749 int len = *d++; 750 int id = get_unaligned_be16(&d[0]); 751 752 switch (id) { 753 case MHL_BURST_ID_BLK_RCV_BUFFER_INFO: 754 ctx->burst.r_size = get_unaligned_le16(&d[2]); 755 break; 756 default: 757 break; 758 } 759 count -= len; 760 d += len; 761 } 762 ctx->burst.rx_count = 0; 763 } 764 765 static void sii8620_fetch_edid(struct sii8620 *ctx) 766 { 767 u8 lm_ddc, ddc_cmd, int3, cbus; 768 unsigned long timeout; 769 int fetched, i; 770 int edid_len = EDID_LENGTH; 771 u8 *edid; 772 773 sii8620_readb(ctx, REG_CBUS_STATUS); 774 lm_ddc = sii8620_readb(ctx, REG_LM_DDC); 775 ddc_cmd = sii8620_readb(ctx, REG_DDC_CMD); 776 777 sii8620_write_seq(ctx, 778 REG_INTR9_MASK, 0, 779 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO, 780 REG_HDCP2X_POLL_CS, 0x71, 781 REG_HDCP2X_CTRL_0, BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX, 782 REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED, 783 ); 784 785 for (i = 0; i < 256; ++i) { 786 u8 ddc_stat = sii8620_readb(ctx, REG_DDC_STATUS); 787 788 if (!(ddc_stat & BIT_DDC_STATUS_DDC_I2C_IN_PROG)) 789 break; 790 sii8620_write(ctx, REG_DDC_STATUS, 791 BIT_DDC_STATUS_DDC_FIFO_EMPTY); 792 } 793 794 sii8620_write(ctx, REG_DDC_ADDR, 0x50 << 1); 795 796 edid = kmalloc(EDID_LENGTH, GFP_KERNEL); 797 if (!edid) { 798 ctx->error = -ENOMEM; 799 return; 800 } 801 802 #define FETCH_SIZE 16 803 for (fetched = 0; fetched < edid_len; fetched += FETCH_SIZE) { 804 sii8620_readb(ctx, REG_DDC_STATUS); 805 sii8620_write_seq(ctx, 806 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_ABORT, 807 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO, 808 REG_DDC_STATUS, BIT_DDC_STATUS_DDC_FIFO_EMPTY 809 ); 810 sii8620_write_seq(ctx, 811 REG_DDC_SEGM, fetched >> 8, 812 REG_DDC_OFFSET, fetched & 0xff, 813 REG_DDC_DIN_CNT1, FETCH_SIZE, 814 REG_DDC_DIN_CNT2, 0, 815 REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK 816 ); 817 818 int3 = 0; 819 timeout = jiffies + msecs_to_jiffies(200); 820 for (;;) { 821 cbus = sii8620_readb(ctx, REG_CBUS_STATUS); 822 if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) { 823 kfree(edid); 824 edid = NULL; 825 goto end; 826 } 827 if (int3 & BIT_DDC_CMD_DONE) { 828 if (sii8620_readb(ctx, REG_DDC_DOUT_CNT) 829 >= FETCH_SIZE) 830 break; 831 } else { 832 int3 = sii8620_readb(ctx, REG_INTR3); 833 } 834 if (time_is_before_jiffies(timeout)) { 835 ctx->error = -ETIMEDOUT; 836 dev_err(ctx->dev, "timeout during EDID read\n"); 837 kfree(edid); 838 edid = NULL; 839 goto end; 840 } 841 usleep_range(10, 20); 842 } 843 844 sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE); 845 if (fetched + FETCH_SIZE == EDID_LENGTH) { 846 u8 ext = ((struct edid *)edid)->extensions; 847 848 if (ext) { 849 u8 *new_edid; 850 851 edid_len += ext * EDID_LENGTH; 852 new_edid = krealloc(edid, edid_len, GFP_KERNEL); 853 if (!new_edid) { 854 kfree(edid); 855 ctx->error = -ENOMEM; 856 return; 857 } 858 edid = new_edid; 859 } 860 } 861 } 862 863 sii8620_write_seq(ctx, 864 REG_INTR3_MASK, BIT_DDC_CMD_DONE, 865 REG_LM_DDC, lm_ddc 866 ); 867 868 end: 869 kfree(ctx->edid); 870 ctx->edid = (struct edid *)edid; 871 } 872 873 static void sii8620_set_upstream_edid(struct sii8620 *ctx) 874 { 875 sii8620_setbits(ctx, REG_DPD, BIT_DPD_PDNRX12 | BIT_DPD_PDIDCK_N 876 | BIT_DPD_PD_MHL_CLK_N, 0xff); 877 878 sii8620_write_seq_static(ctx, 879 REG_RX_HDMI_CTRL3, 0x00, 880 REG_PKT_FILTER_0, 0xFF, 881 REG_PKT_FILTER_1, 0xFF, 882 REG_ALICE0_BW_I2C, 0x06 883 ); 884 885 sii8620_setbits(ctx, REG_RX_HDMI_CLR_BUFFER, 886 BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN, 0xff); 887 888 sii8620_write_seq_static(ctx, 889 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO 890 | BIT_EDID_CTRL_EDID_MODE_EN, 891 REG_EDID_FIFO_ADDR, 0, 892 ); 893 894 sii8620_write_buf(ctx, REG_EDID_FIFO_WR_DATA, (u8 *)ctx->edid, 895 (ctx->edid->extensions + 1) * EDID_LENGTH); 896 897 sii8620_write_seq_static(ctx, 898 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID 899 | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO 900 | BIT_EDID_CTRL_EDID_MODE_EN, 901 REG_INTR5_MASK, BIT_INTR_SCDT_CHANGE, 902 REG_INTR9_MASK, 0 903 ); 904 } 905 906 static void sii8620_xtal_set_rate(struct sii8620 *ctx) 907 { 908 static const struct { 909 unsigned int rate; 910 u8 div; 911 u8 tp1; 912 } rates[] = { 913 { 19200, 0x04, 0x53 }, 914 { 20000, 0x04, 0x62 }, 915 { 24000, 0x05, 0x75 }, 916 { 30000, 0x06, 0x92 }, 917 { 38400, 0x0c, 0xbc }, 918 }; 919 unsigned long rate = clk_get_rate(ctx->clk_xtal) / 1000; 920 int i; 921 922 for (i = 0; i < ARRAY_SIZE(rates) - 1; ++i) 923 if (rate <= rates[i].rate) 924 break; 925 926 if (rate != rates[i].rate) 927 dev_err(ctx->dev, "xtal clock rate(%lukHz) not supported, setting MHL for %ukHz.\n", 928 rate, rates[i].rate); 929 930 sii8620_write(ctx, REG_DIV_CTL_MAIN, rates[i].div); 931 sii8620_write(ctx, REG_HDCP2X_TP1, rates[i].tp1); 932 } 933 934 static int sii8620_hw_on(struct sii8620 *ctx) 935 { 936 int ret; 937 938 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 939 if (ret) 940 return ret; 941 942 usleep_range(10000, 20000); 943 ret = clk_prepare_enable(ctx->clk_xtal); 944 if (ret) 945 return ret; 946 947 msleep(100); 948 gpiod_set_value(ctx->gpio_reset, 0); 949 msleep(100); 950 951 return 0; 952 } 953 954 static int sii8620_hw_off(struct sii8620 *ctx) 955 { 956 clk_disable_unprepare(ctx->clk_xtal); 957 gpiod_set_value(ctx->gpio_reset, 1); 958 return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 959 } 960 961 static void sii8620_cbus_reset(struct sii8620 *ctx) 962 { 963 sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST 964 | BIT_PWD_SRST_CBUS_RST_SW_EN); 965 usleep_range(10000, 20000); 966 sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN); 967 } 968 969 static void sii8620_set_auto_zone(struct sii8620 *ctx) 970 { 971 if (ctx->mode != CM_MHL1) { 972 sii8620_write_seq_static(ctx, 973 REG_TX_ZONE_CTL1, 0x0, 974 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X 975 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL 976 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE 977 ); 978 } else { 979 sii8620_write_seq_static(ctx, 980 REG_TX_ZONE_CTL1, VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE, 981 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X 982 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE 983 ); 984 } 985 } 986 987 static void sii8620_stop_video(struct sii8620 *ctx) 988 { 989 u8 uninitialized_var(val); 990 991 sii8620_write_seq_static(ctx, 992 REG_TPI_INTR_EN, 0, 993 REG_HDCP2X_INTR0_MASK, 0, 994 REG_TPI_COPP_DATA2, 0, 995 REG_TPI_INTR_ST0, ~0, 996 ); 997 998 switch (ctx->sink_type) { 999 case SINK_DVI: 1000 val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN 1001 | BIT_TPI_SC_TPI_AV_MUTE; 1002 break; 1003 case SINK_HDMI: 1004 default: 1005 val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN 1006 | BIT_TPI_SC_TPI_AV_MUTE 1007 | BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI; 1008 break; 1009 } 1010 1011 sii8620_write(ctx, REG_TPI_SC, val); 1012 } 1013 1014 static void sii8620_set_format(struct sii8620 *ctx) 1015 { 1016 u8 out_fmt; 1017 1018 if (sii8620_is_mhl3(ctx)) { 1019 sii8620_setbits(ctx, REG_M3_P0CTRL, 1020 BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED, 1021 ctx->use_packed_pixel ? ~0 : 0); 1022 } else { 1023 if (ctx->use_packed_pixel) { 1024 sii8620_write_seq_static(ctx, 1025 REG_VID_MODE, BIT_VID_MODE_M1080P, 1026 REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1, 1027 REG_MHLTX_CTL6, 0x60 1028 ); 1029 } else { 1030 sii8620_write_seq_static(ctx, 1031 REG_VID_MODE, 0, 1032 REG_MHL_TOP_CTL, 1, 1033 REG_MHLTX_CTL6, 0xa0 1034 ); 1035 } 1036 } 1037 1038 if (ctx->use_packed_pixel) 1039 out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL); 1040 else 1041 out_fmt = VAL_TPI_FORMAT(RGB, FULL); 1042 1043 sii8620_write_seq(ctx, 1044 REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL), 1045 REG_TPI_OUTPUT, out_fmt, 1046 ); 1047 } 1048 1049 static int mhl3_infoframe_init(struct mhl3_infoframe *frame) 1050 { 1051 memset(frame, 0, sizeof(*frame)); 1052 1053 frame->version = 3; 1054 frame->hev_format = -1; 1055 return 0; 1056 } 1057 1058 static ssize_t mhl3_infoframe_pack(struct mhl3_infoframe *frame, 1059 void *buffer, size_t size) 1060 { 1061 const int frm_len = HDMI_INFOFRAME_HEADER_SIZE + MHL3_INFOFRAME_SIZE; 1062 u8 *ptr = buffer; 1063 1064 if (size < frm_len) 1065 return -ENOSPC; 1066 1067 memset(buffer, 0, size); 1068 ptr[0] = HDMI_INFOFRAME_TYPE_VENDOR; 1069 ptr[1] = frame->version; 1070 ptr[2] = MHL3_INFOFRAME_SIZE; 1071 ptr[4] = MHL3_IEEE_OUI & 0xff; 1072 ptr[5] = (MHL3_IEEE_OUI >> 8) & 0xff; 1073 ptr[6] = (MHL3_IEEE_OUI >> 16) & 0xff; 1074 ptr[7] = frame->video_format & 0x3; 1075 ptr[7] |= (frame->format_type & 0x7) << 2; 1076 ptr[7] |= frame->sep_audio ? BIT(5) : 0; 1077 if (frame->hev_format >= 0) { 1078 ptr[9] = 1; 1079 ptr[10] = (frame->hev_format >> 8) & 0xff; 1080 ptr[11] = frame->hev_format & 0xff; 1081 } 1082 if (frame->av_delay) { 1083 bool sign = frame->av_delay < 0; 1084 int delay = sign ? -frame->av_delay : frame->av_delay; 1085 1086 ptr[12] = (delay >> 16) & 0xf; 1087 if (sign) 1088 ptr[12] |= BIT(4); 1089 ptr[13] = (delay >> 8) & 0xff; 1090 ptr[14] = delay & 0xff; 1091 } 1092 ptr[3] -= sii8620_checksum(buffer, frm_len); 1093 return frm_len; 1094 } 1095 1096 static void sii8620_set_infoframes(struct sii8620 *ctx, 1097 struct drm_display_mode *mode) 1098 { 1099 struct mhl3_infoframe mhl_frm; 1100 union hdmi_infoframe frm; 1101 u8 buf[31]; 1102 int ret; 1103 1104 ret = drm_hdmi_avi_infoframe_from_display_mode(&frm.avi, 1105 NULL, mode); 1106 if (ctx->use_packed_pixel) 1107 frm.avi.colorspace = HDMI_COLORSPACE_YUV422; 1108 1109 if (!ret) 1110 ret = hdmi_avi_infoframe_pack(&frm.avi, buf, ARRAY_SIZE(buf)); 1111 if (ret > 0) 1112 sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, buf + 3, ret - 3); 1113 1114 if (!sii8620_is_mhl3(ctx) || !ctx->use_packed_pixel) { 1115 sii8620_write(ctx, REG_TPI_SC, 1116 BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI); 1117 sii8620_write(ctx, REG_PKT_FILTER_0, 1118 BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT | 1119 BIT_PKT_FILTER_0_DROP_MPEG_PKT | 1120 BIT_PKT_FILTER_0_DROP_GCP_PKT, 1121 BIT_PKT_FILTER_1_DROP_GEN_PKT); 1122 return; 1123 } 1124 1125 sii8620_write(ctx, REG_PKT_FILTER_0, 1126 BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT | 1127 BIT_PKT_FILTER_0_DROP_MPEG_PKT | 1128 BIT_PKT_FILTER_0_DROP_AVI_PKT | 1129 BIT_PKT_FILTER_0_DROP_GCP_PKT, 1130 BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS | 1131 BIT_PKT_FILTER_1_DROP_GEN_PKT | 1132 BIT_PKT_FILTER_1_DROP_VSIF_PKT); 1133 1134 sii8620_write(ctx, REG_TPI_INFO_FSEL, BIT_TPI_INFO_FSEL_EN 1135 | BIT_TPI_INFO_FSEL_RPT | VAL_TPI_INFO_FSEL_VSI); 1136 ret = mhl3_infoframe_init(&mhl_frm); 1137 if (!ret) 1138 ret = mhl3_infoframe_pack(&mhl_frm, buf, ARRAY_SIZE(buf)); 1139 sii8620_write_buf(ctx, REG_TPI_INFO_B0, buf, ret); 1140 } 1141 1142 static void sii8620_start_video(struct sii8620 *ctx) 1143 { 1144 struct drm_display_mode *mode = 1145 &ctx->bridge.encoder->crtc->state->adjusted_mode; 1146 1147 if (!sii8620_is_mhl3(ctx)) 1148 sii8620_stop_video(ctx); 1149 1150 if (ctx->sink_type == SINK_DVI && !sii8620_is_mhl3(ctx)) { 1151 sii8620_write(ctx, REG_RX_HDMI_CTRL2, 1152 VAL_RX_HDMI_CTRL2_DEFVAL); 1153 sii8620_write(ctx, REG_TPI_SC, 0); 1154 return; 1155 } 1156 1157 sii8620_write_seq_static(ctx, 1158 REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL 1159 | BIT_RX_HDMI_CTRL2_USE_AV_MUTE, 1160 REG_VID_OVRRD, BIT_VID_OVRRD_PP_AUTO_DISABLE 1161 | BIT_VID_OVRRD_M1080P_OVRRD); 1162 sii8620_set_format(ctx); 1163 1164 if (!sii8620_is_mhl3(ctx)) { 1165 u8 link_mode = MHL_DST_LM_PATH_ENABLED; 1166 1167 if (ctx->use_packed_pixel) 1168 link_mode |= MHL_DST_LM_CLK_MODE_PACKED_PIXEL; 1169 else 1170 link_mode |= MHL_DST_LM_CLK_MODE_NORMAL; 1171 1172 sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE), link_mode); 1173 sii8620_set_auto_zone(ctx); 1174 } else { 1175 static const struct { 1176 int max_clk; 1177 u8 zone; 1178 u8 link_rate; 1179 u8 rrp_decode; 1180 } clk_spec[] = { 1181 { 150000, VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS, 1182 MHL_XDS_LINK_RATE_1_5_GBPS, 0x38 }, 1183 { 300000, VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS, 1184 MHL_XDS_LINK_RATE_3_0_GBPS, 0x40 }, 1185 { 600000, VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS, 1186 MHL_XDS_LINK_RATE_6_0_GBPS, 0x40 }, 1187 }; 1188 u8 p0_ctrl = BIT_M3_P0CTRL_MHL3_P0_PORT_EN; 1189 int clk = mode->clock * (ctx->use_packed_pixel ? 2 : 3); 1190 int i; 1191 1192 for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i) 1193 if (clk < clk_spec[i].max_clk) 1194 break; 1195 1196 if (100 * clk >= 98 * clk_spec[i].max_clk) 1197 p0_ctrl |= BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN; 1198 1199 sii8620_burst_tx_bits_per_pixel_fmt(ctx, ctx->use_packed_pixel); 1200 sii8620_burst_send(ctx); 1201 sii8620_write_seq(ctx, 1202 REG_MHL_DP_CTL0, 0xf0, 1203 REG_MHL3_TX_ZONE_CTL, clk_spec[i].zone); 1204 sii8620_setbits(ctx, REG_M3_P0CTRL, 1205 BIT_M3_P0CTRL_MHL3_P0_PORT_EN 1206 | BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN, p0_ctrl); 1207 sii8620_setbits(ctx, REG_M3_POSTM, MSK_M3_POSTM_RRP_DECODE, 1208 clk_spec[i].rrp_decode); 1209 sii8620_write_seq_static(ctx, 1210 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE 1211 | BIT_M3_CTRL_H2M_SWRST, 1212 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE 1213 ); 1214 sii8620_mt_write_stat(ctx, MHL_XDS_REG(AVLINK_MODE_CONTROL), 1215 clk_spec[i].link_rate); 1216 } 1217 1218 sii8620_set_infoframes(ctx, mode); 1219 } 1220 1221 static void sii8620_disable_hpd(struct sii8620 *ctx) 1222 { 1223 sii8620_setbits(ctx, REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID, 0); 1224 sii8620_write_seq_static(ctx, 1225 REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN, 1226 REG_INTR8_MASK, 0 1227 ); 1228 } 1229 1230 static void sii8620_enable_hpd(struct sii8620 *ctx) 1231 { 1232 sii8620_setbits(ctx, REG_TMDS_CSTAT_P3, 1233 BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS 1234 | BIT_TMDS_CSTAT_P3_CLR_AVI, ~0); 1235 sii8620_write_seq_static(ctx, 1236 REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN 1237 | BIT_HPD_CTRL_HPD_HIGH, 1238 ); 1239 } 1240 1241 static void sii8620_mhl_discover(struct sii8620 *ctx) 1242 { 1243 sii8620_write_seq_static(ctx, 1244 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT 1245 | BIT_DISC_CTRL9_DISC_PULSE_PROCEED, 1246 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_5K, VAL_PUP_20K), 1247 REG_CBUS_DISC_INTR0_MASK, BIT_MHL3_EST_INT 1248 | BIT_MHL_EST_INT 1249 | BIT_NOT_MHL_EST_INT 1250 | BIT_CBUS_MHL3_DISCON_INT 1251 | BIT_CBUS_MHL12_DISCON_INT 1252 | BIT_RGND_READY_INT, 1253 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X 1254 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL 1255 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE, 1256 REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE 1257 | BIT_MHL_DP_CTL0_TX_OE_OVR, 1258 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE, 1259 REG_MHL_DP_CTL1, 0xA2, 1260 REG_MHL_DP_CTL2, 0x03, 1261 REG_MHL_DP_CTL3, 0x35, 1262 REG_MHL_DP_CTL5, 0x02, 1263 REG_MHL_DP_CTL6, 0x02, 1264 REG_MHL_DP_CTL7, 0x03, 1265 REG_COC_CTLC, 0xFF, 1266 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 1267 | BIT_DPD_OSC_EN | BIT_DPD_PWRON_HSIC, 1268 REG_COC_INTR_MASK, BIT_COC_PLL_LOCK_STATUS_CHANGE 1269 | BIT_COC_CALIBRATION_DONE, 1270 REG_CBUS_INT_1_MASK, BIT_CBUS_MSC_ABORT_RCVD 1271 | BIT_CBUS_CMD_ABORT, 1272 REG_CBUS_INT_0_MASK, BIT_CBUS_MSC_MT_DONE 1273 | BIT_CBUS_HPD_CHG 1274 | BIT_CBUS_MSC_MR_WRITE_STAT 1275 | BIT_CBUS_MSC_MR_MSC_MSG 1276 | BIT_CBUS_MSC_MR_WRITE_BURST 1277 | BIT_CBUS_MSC_MR_SET_INT 1278 | BIT_CBUS_MSC_MT_DONE_NACK 1279 ); 1280 } 1281 1282 static void sii8620_peer_specific_init(struct sii8620 *ctx) 1283 { 1284 if (sii8620_is_mhl3(ctx)) 1285 sii8620_write_seq_static(ctx, 1286 REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD, 1287 REG_EMSCINTRMASK1, 1288 BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR 1289 ); 1290 else 1291 sii8620_write_seq_static(ctx, 1292 REG_HDCP2X_INTR0_MASK, 0x00, 1293 REG_EMSCINTRMASK1, 0x00, 1294 REG_HDCP2X_INTR0, 0xFF, 1295 REG_INTR1, 0xFF, 1296 REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD 1297 | BIT_SYS_CTRL1_TX_CTRL_HDMI 1298 ); 1299 } 1300 1301 #define SII8620_MHL_VERSION 0x32 1302 #define SII8620_SCRATCHPAD_SIZE 16 1303 #define SII8620_INT_STAT_SIZE 0x33 1304 1305 static void sii8620_set_dev_cap(struct sii8620 *ctx) 1306 { 1307 static const u8 devcap[MHL_DCAP_SIZE] = { 1308 [MHL_DCAP_MHL_VERSION] = SII8620_MHL_VERSION, 1309 [MHL_DCAP_CAT] = MHL_DCAP_CAT_SOURCE | MHL_DCAP_CAT_POWER, 1310 [MHL_DCAP_ADOPTER_ID_H] = 0x01, 1311 [MHL_DCAP_ADOPTER_ID_L] = 0x41, 1312 [MHL_DCAP_VID_LINK_MODE] = MHL_DCAP_VID_LINK_RGB444 1313 | MHL_DCAP_VID_LINK_PPIXEL 1314 | MHL_DCAP_VID_LINK_16BPP, 1315 [MHL_DCAP_AUD_LINK_MODE] = MHL_DCAP_AUD_LINK_2CH, 1316 [MHL_DCAP_VIDEO_TYPE] = MHL_DCAP_VT_GRAPHICS, 1317 [MHL_DCAP_LOG_DEV_MAP] = MHL_DCAP_LD_GUI, 1318 [MHL_DCAP_BANDWIDTH] = 0x0f, 1319 [MHL_DCAP_FEATURE_FLAG] = MHL_DCAP_FEATURE_RCP_SUPPORT 1320 | MHL_DCAP_FEATURE_RAP_SUPPORT 1321 | MHL_DCAP_FEATURE_SP_SUPPORT, 1322 [MHL_DCAP_SCRATCHPAD_SIZE] = SII8620_SCRATCHPAD_SIZE, 1323 [MHL_DCAP_INT_STAT_SIZE] = SII8620_INT_STAT_SIZE, 1324 }; 1325 static const u8 xdcap[MHL_XDC_SIZE] = { 1326 [MHL_XDC_ECBUS_SPEEDS] = MHL_XDC_ECBUS_S_075 1327 | MHL_XDC_ECBUS_S_8BIT, 1328 [MHL_XDC_TMDS_SPEEDS] = MHL_XDC_TMDS_150 1329 | MHL_XDC_TMDS_300 | MHL_XDC_TMDS_600, 1330 [MHL_XDC_ECBUS_ROLES] = MHL_XDC_DEV_HOST, 1331 [MHL_XDC_LOG_DEV_MAPX] = MHL_XDC_LD_PHONE, 1332 }; 1333 1334 sii8620_write_buf(ctx, REG_MHL_DEVCAP_0, devcap, ARRAY_SIZE(devcap)); 1335 sii8620_write_buf(ctx, REG_MHL_EXTDEVCAP_0, xdcap, ARRAY_SIZE(xdcap)); 1336 } 1337 1338 static void sii8620_mhl_init(struct sii8620 *ctx) 1339 { 1340 sii8620_write_seq_static(ctx, 1341 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K), 1342 REG_CBUS_MSC_COMPAT_CTRL, 1343 BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN, 1344 ); 1345 1346 sii8620_peer_specific_init(ctx); 1347 1348 sii8620_disable_hpd(ctx); 1349 1350 sii8620_write_seq_static(ctx, 1351 REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO, 1352 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT 1353 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS, 1354 REG_TMDS0_CCTRL1, 0x90, 1355 REG_TMDS_CLK_EN, 0x01, 1356 REG_TMDS_CH_EN, 0x11, 1357 REG_BGR_BIAS, 0x87, 1358 REG_ALICE0_ZONE_CTRL, 0xE8, 1359 REG_ALICE0_MODE_CTRL, 0x04, 1360 ); 1361 sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0); 1362 sii8620_write_seq_static(ctx, 1363 REG_TPI_HW_OPT3, 0x76, 1364 REG_TMDS_CCTRL, BIT_TMDS_CCTRL_TMDS_OE, 1365 REG_TPI_DTD_B2, 79, 1366 ); 1367 sii8620_set_dev_cap(ctx); 1368 sii8620_write_seq_static(ctx, 1369 REG_MDT_XMIT_TIMEOUT, 100, 1370 REG_MDT_XMIT_CTRL, 0x03, 1371 REG_MDT_XFIFO_STAT, 0x00, 1372 REG_MDT_RCV_TIMEOUT, 100, 1373 REG_CBUS_LINK_CTRL_8, 0x1D, 1374 ); 1375 1376 sii8620_start_gen2_write_burst(ctx); 1377 sii8620_write_seq_static(ctx, 1378 REG_BIST_CTRL, 0x00, 1379 REG_COC_CTL1, 0x10, 1380 REG_COC_CTL2, 0x18, 1381 REG_COC_CTLF, 0x07, 1382 REG_COC_CTL11, 0xF8, 1383 REG_COC_CTL17, 0x61, 1384 REG_COC_CTL18, 0x46, 1385 REG_COC_CTL19, 0x15, 1386 REG_COC_CTL1A, 0x01, 1387 REG_MHL_COC_CTL3, BIT_MHL_COC_CTL3_COC_AECHO_EN, 1388 REG_MHL_COC_CTL4, 0x2D, 1389 REG_MHL_COC_CTL5, 0xF9, 1390 REG_MSC_HEARTBEAT_CTRL, 0x27, 1391 ); 1392 sii8620_disable_gen2_write_burst(ctx); 1393 1394 sii8620_mt_write_stat(ctx, MHL_DST_REG(VERSION), SII8620_MHL_VERSION); 1395 sii8620_mt_write_stat(ctx, MHL_DST_REG(CONNECTED_RDY), 1396 MHL_DST_CONN_DCAP_RDY | MHL_DST_CONN_XDEVCAPP_SUPP 1397 | MHL_DST_CONN_POW_STAT); 1398 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), MHL_INT_RC_DCAP_CHG); 1399 } 1400 1401 static void sii8620_emsc_enable(struct sii8620 *ctx) 1402 { 1403 u8 reg; 1404 1405 sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_EMSC_EN 1406 | BIT_GENCTL_CLR_EMSC_RFIFO 1407 | BIT_GENCTL_CLR_EMSC_XFIFO, ~0); 1408 sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_CLR_EMSC_RFIFO 1409 | BIT_GENCTL_CLR_EMSC_XFIFO, 0); 1410 sii8620_setbits(ctx, REG_COMMECNT, BIT_COMMECNT_I2C_TO_EMSC_EN, ~0); 1411 reg = sii8620_readb(ctx, REG_EMSCINTR); 1412 sii8620_write(ctx, REG_EMSCINTR, reg); 1413 sii8620_write(ctx, REG_EMSCINTRMASK, BIT_EMSCINTR_SPI_DVLD); 1414 } 1415 1416 static int sii8620_wait_for_fsm_state(struct sii8620 *ctx, u8 state) 1417 { 1418 int i; 1419 1420 for (i = 0; i < 10; ++i) { 1421 u8 s = sii8620_readb(ctx, REG_COC_STAT_0); 1422 1423 if ((s & MSK_COC_STAT_0_FSM_STATE) == state) 1424 return 0; 1425 if (!(s & BIT_COC_STAT_0_PLL_LOCKED)) 1426 return -EBUSY; 1427 usleep_range(4000, 6000); 1428 } 1429 return -ETIMEDOUT; 1430 } 1431 1432 static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode) 1433 { 1434 int ret; 1435 1436 if (ctx->mode == mode) 1437 return; 1438 1439 switch (mode) { 1440 case CM_MHL1: 1441 sii8620_write_seq_static(ctx, 1442 REG_CBUS_MSC_COMPAT_CTRL, 0x02, 1443 REG_M3_CTRL, VAL_M3_CTRL_MHL1_2_VALUE, 1444 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 1445 | BIT_DPD_OSC_EN, 1446 REG_COC_INTR_MASK, 0 1447 ); 1448 ctx->mode = mode; 1449 break; 1450 case CM_MHL3: 1451 sii8620_write(ctx, REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE); 1452 ctx->mode = mode; 1453 return; 1454 case CM_ECBUS_S: 1455 sii8620_emsc_enable(ctx); 1456 sii8620_write_seq_static(ctx, 1457 REG_TTXSPINUMS, 4, 1458 REG_TRXSPINUMS, 4, 1459 REG_TTXHSICNUMS, 0x14, 1460 REG_TRXHSICNUMS, 0x14, 1461 REG_TTXTOTNUMS, 0x18, 1462 REG_TRXTOTNUMS, 0x18, 1463 REG_PWD_SRST, BIT_PWD_SRST_COC_DOC_RST 1464 | BIT_PWD_SRST_CBUS_RST_SW_EN, 1465 REG_MHL_COC_CTL1, 0xbd, 1466 REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN, 1467 REG_COC_CTLB, 0x01, 1468 REG_COC_CTL0, 0x5c, 1469 REG_COC_CTL14, 0x03, 1470 REG_COC_CTL15, 0x80, 1471 REG_MHL_DP_CTL6, BIT_MHL_DP_CTL6_DP_TAP1_SGN 1472 | BIT_MHL_DP_CTL6_DP_TAP1_EN 1473 | BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN, 1474 REG_MHL_DP_CTL8, 0x03 1475 ); 1476 ret = sii8620_wait_for_fsm_state(ctx, 0x03); 1477 sii8620_write_seq_static(ctx, 1478 REG_COC_CTL14, 0x00, 1479 REG_COC_CTL15, 0x80 1480 ); 1481 if (!ret) 1482 sii8620_write(ctx, REG_CBUS3_CNVT, 0x85); 1483 else 1484 sii8620_disconnect(ctx); 1485 return; 1486 case CM_DISCONNECTED: 1487 ctx->mode = mode; 1488 break; 1489 default: 1490 dev_err(ctx->dev, "%s mode %d not supported\n", __func__, mode); 1491 break; 1492 } 1493 1494 sii8620_set_auto_zone(ctx); 1495 1496 if (mode != CM_MHL1) 1497 return; 1498 1499 sii8620_write_seq_static(ctx, 1500 REG_MHL_DP_CTL0, 0xBC, 1501 REG_MHL_DP_CTL1, 0xBB, 1502 REG_MHL_DP_CTL3, 0x48, 1503 REG_MHL_DP_CTL5, 0x39, 1504 REG_MHL_DP_CTL2, 0x2A, 1505 REG_MHL_DP_CTL6, 0x2A, 1506 REG_MHL_DP_CTL7, 0x08 1507 ); 1508 } 1509 1510 static void sii8620_hpd_unplugged(struct sii8620 *ctx) 1511 { 1512 sii8620_disable_hpd(ctx); 1513 ctx->sink_type = SINK_NONE; 1514 ctx->sink_detected = false; 1515 ctx->feature_complete = false; 1516 kfree(ctx->edid); 1517 ctx->edid = NULL; 1518 } 1519 1520 static void sii8620_disconnect(struct sii8620 *ctx) 1521 { 1522 sii8620_disable_gen2_write_burst(ctx); 1523 sii8620_stop_video(ctx); 1524 msleep(100); 1525 sii8620_cbus_reset(ctx); 1526 sii8620_set_mode(ctx, CM_DISCONNECTED); 1527 sii8620_write_seq_static(ctx, 1528 REG_TX_ZONE_CTL1, 0, 1529 REG_MHL_PLL_CTL0, 0x07, 1530 REG_COC_CTL0, 0x40, 1531 REG_CBUS3_CNVT, 0x84, 1532 REG_COC_CTL14, 0x00, 1533 REG_COC_CTL0, 0x40, 1534 REG_HRXCTRL3, 0x07, 1535 REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X 1536 | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL 1537 | BIT_MHL_PLL_CTL0_ZONE_MASK_OE, 1538 REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE 1539 | BIT_MHL_DP_CTL0_TX_OE_OVR, 1540 REG_MHL_DP_CTL1, 0xBB, 1541 REG_MHL_DP_CTL3, 0x48, 1542 REG_MHL_DP_CTL5, 0x3F, 1543 REG_MHL_DP_CTL2, 0x2F, 1544 REG_MHL_DP_CTL6, 0x2A, 1545 REG_MHL_DP_CTL7, 0x03 1546 ); 1547 sii8620_hpd_unplugged(ctx); 1548 sii8620_write_seq_static(ctx, 1549 REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE, 1550 REG_MHL_COC_CTL1, 0x07, 1551 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K), 1552 REG_DISC_CTRL8, 0x00, 1553 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT 1554 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS, 1555 REG_INT_CTRL, 0x00, 1556 REG_MSC_HEARTBEAT_CTRL, 0x27, 1557 REG_DISC_CTRL1, 0x25, 1558 REG_CBUS_DISC_INTR0, (u8)~BIT_RGND_READY_INT, 1559 REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT, 1560 REG_MDT_INT_1, 0xff, 1561 REG_MDT_INT_1_MASK, 0x00, 1562 REG_MDT_INT_0, 0xff, 1563 REG_MDT_INT_0_MASK, 0x00, 1564 REG_COC_INTR, 0xff, 1565 REG_COC_INTR_MASK, 0x00, 1566 REG_TRXINTH, 0xff, 1567 REG_TRXINTMH, 0x00, 1568 REG_CBUS_INT_0, 0xff, 1569 REG_CBUS_INT_0_MASK, 0x00, 1570 REG_CBUS_INT_1, 0xff, 1571 REG_CBUS_INT_1_MASK, 0x00, 1572 REG_EMSCINTR, 0xff, 1573 REG_EMSCINTRMASK, 0x00, 1574 REG_EMSCINTR1, 0xff, 1575 REG_EMSCINTRMASK1, 0x00, 1576 REG_INTR8, 0xff, 1577 REG_INTR8_MASK, 0x00, 1578 REG_TPI_INTR_ST0, 0xff, 1579 REG_TPI_INTR_EN, 0x00, 1580 REG_HDCP2X_INTR0, 0xff, 1581 REG_HDCP2X_INTR0_MASK, 0x00, 1582 REG_INTR9, 0xff, 1583 REG_INTR9_MASK, 0x00, 1584 REG_INTR3, 0xff, 1585 REG_INTR3_MASK, 0x00, 1586 REG_INTR5, 0xff, 1587 REG_INTR5_MASK, 0x00, 1588 REG_INTR2, 0xff, 1589 REG_INTR2_MASK, 0x00, 1590 ); 1591 memset(ctx->stat, 0, sizeof(ctx->stat)); 1592 memset(ctx->xstat, 0, sizeof(ctx->xstat)); 1593 memset(ctx->devcap, 0, sizeof(ctx->devcap)); 1594 memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap)); 1595 ctx->devcap_read = false; 1596 ctx->cbus_status = 0; 1597 sii8620_mt_cleanup(ctx); 1598 } 1599 1600 static void sii8620_mhl_disconnected(struct sii8620 *ctx) 1601 { 1602 sii8620_write_seq_static(ctx, 1603 REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K), 1604 REG_CBUS_MSC_COMPAT_CTRL, 1605 BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN 1606 ); 1607 sii8620_disconnect(ctx); 1608 } 1609 1610 static void sii8620_irq_disc(struct sii8620 *ctx) 1611 { 1612 u8 stat = sii8620_readb(ctx, REG_CBUS_DISC_INTR0); 1613 1614 if (stat & VAL_CBUS_MHL_DISCON) 1615 sii8620_mhl_disconnected(ctx); 1616 1617 if (stat & BIT_RGND_READY_INT) { 1618 u8 stat2 = sii8620_readb(ctx, REG_DISC_STAT2); 1619 1620 if ((stat2 & MSK_DISC_STAT2_RGND) == VAL_RGND_1K) { 1621 sii8620_mhl_discover(ctx); 1622 } else { 1623 sii8620_write_seq_static(ctx, 1624 REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT 1625 | BIT_DISC_CTRL9_NOMHL_EST 1626 | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS, 1627 REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT 1628 | BIT_CBUS_MHL3_DISCON_INT 1629 | BIT_CBUS_MHL12_DISCON_INT 1630 | BIT_NOT_MHL_EST_INT 1631 ); 1632 } 1633 } 1634 if (stat & BIT_MHL_EST_INT) 1635 sii8620_mhl_init(ctx); 1636 1637 sii8620_write(ctx, REG_CBUS_DISC_INTR0, stat); 1638 } 1639 1640 static void sii8620_read_burst(struct sii8620 *ctx) 1641 { 1642 u8 buf[17]; 1643 1644 sii8620_read_buf(ctx, REG_MDT_RCV_READ_PORT, buf, ARRAY_SIZE(buf)); 1645 sii8620_write(ctx, REG_MDT_RCV_CTRL, BIT_MDT_RCV_CTRL_MDT_RCV_EN | 1646 BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN | 1647 BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR); 1648 sii8620_readb(ctx, REG_MDT_RFIFO_STAT); 1649 } 1650 1651 static void sii8620_irq_g2wb(struct sii8620 *ctx) 1652 { 1653 u8 stat = sii8620_readb(ctx, REG_MDT_INT_0); 1654 1655 if (stat & BIT_MDT_IDLE_AFTER_HAWB_DISABLE) 1656 if (sii8620_is_mhl3(ctx)) 1657 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), 1658 MHL_INT_RC_FEAT_COMPLETE); 1659 1660 if (stat & BIT_MDT_RFIFO_DATA_RDY) 1661 sii8620_read_burst(ctx); 1662 1663 if (stat & BIT_MDT_XFIFO_EMPTY) 1664 sii8620_write(ctx, REG_MDT_XMIT_CTRL, 0); 1665 1666 sii8620_write(ctx, REG_MDT_INT_0, stat); 1667 } 1668 1669 static void sii8620_status_dcap_ready(struct sii8620 *ctx) 1670 { 1671 enum sii8620_mode mode; 1672 1673 mode = ctx->stat[MHL_DST_VERSION] >= 0x30 ? CM_MHL3 : CM_MHL1; 1674 if (mode > ctx->mode) 1675 sii8620_set_mode(ctx, mode); 1676 sii8620_peer_specific_init(ctx); 1677 sii8620_write(ctx, REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE 1678 | BIT_INTR9_EDID_DONE | BIT_INTR9_EDID_ERROR); 1679 } 1680 1681 static void sii8620_status_changed_path(struct sii8620 *ctx) 1682 { 1683 u8 link_mode; 1684 1685 if (ctx->use_packed_pixel) 1686 link_mode = MHL_DST_LM_CLK_MODE_PACKED_PIXEL; 1687 else 1688 link_mode = MHL_DST_LM_CLK_MODE_NORMAL; 1689 1690 if (ctx->stat[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED) 1691 link_mode |= MHL_DST_LM_PATH_ENABLED; 1692 1693 sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE), 1694 link_mode); 1695 } 1696 1697 static void sii8620_msc_mr_write_stat(struct sii8620 *ctx) 1698 { 1699 u8 st[MHL_DST_SIZE], xst[MHL_XDS_SIZE]; 1700 1701 sii8620_read_buf(ctx, REG_MHL_STAT_0, st, MHL_DST_SIZE); 1702 sii8620_read_buf(ctx, REG_MHL_EXTSTAT_0, xst, MHL_XDS_SIZE); 1703 1704 sii8620_update_array(ctx->stat, st, MHL_DST_SIZE); 1705 sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE); 1706 1707 if (ctx->stat[MHL_DST_CONNECTED_RDY] & st[MHL_DST_CONNECTED_RDY] & 1708 MHL_DST_CONN_DCAP_RDY) { 1709 sii8620_status_dcap_ready(ctx); 1710 1711 if (!sii8620_is_mhl3(ctx)) 1712 sii8620_mt_read_devcap(ctx, false); 1713 } 1714 1715 if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED) 1716 sii8620_status_changed_path(ctx); 1717 } 1718 1719 static void sii8620_ecbus_up(struct sii8620 *ctx, int ret) 1720 { 1721 if (ret < 0) 1722 return; 1723 1724 sii8620_set_mode(ctx, CM_ECBUS_S); 1725 } 1726 1727 static void sii8620_got_ecbus_speed(struct sii8620 *ctx, int ret) 1728 { 1729 if (ret < 0) 1730 return; 1731 1732 sii8620_mt_write_stat(ctx, MHL_XDS_REG(CURR_ECBUS_MODE), 1733 MHL_XDS_ECBUS_S | MHL_XDS_SLOT_MODE_8BIT); 1734 sii8620_mt_rap(ctx, MHL_RAP_CBUS_MODE_UP); 1735 sii8620_mt_set_cont(ctx, sii8620_ecbus_up); 1736 } 1737 1738 static void sii8620_mhl_burst_emsc_support_set(struct mhl_burst_emsc_support *d, 1739 enum mhl_burst_id id) 1740 { 1741 sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_EMSC_SUPPORT); 1742 d->num_entries = 1; 1743 d->burst_id[0] = cpu_to_be16(id); 1744 } 1745 1746 static void sii8620_send_features(struct sii8620 *ctx) 1747 { 1748 u8 buf[16]; 1749 1750 sii8620_write(ctx, REG_MDT_XMIT_CTRL, BIT_MDT_XMIT_CTRL_EN 1751 | BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN); 1752 sii8620_mhl_burst_emsc_support_set((void *)buf, 1753 MHL_BURST_ID_HID_PAYLOAD); 1754 sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf)); 1755 } 1756 1757 static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode) 1758 { 1759 bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK); 1760 1761 scancode &= MHL_RCP_KEY_ID_MASK; 1762 1763 if (!IS_ENABLED(CONFIG_RC_CORE) || !ctx->rc_dev) 1764 return false; 1765 1766 if (pressed) 1767 rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0); 1768 else 1769 rc_keyup(ctx->rc_dev); 1770 1771 return true; 1772 } 1773 1774 static void sii8620_msc_mr_set_int(struct sii8620 *ctx) 1775 { 1776 u8 ints[MHL_INT_SIZE]; 1777 1778 sii8620_read_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE); 1779 sii8620_write_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE); 1780 1781 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_DCAP_CHG) { 1782 switch (ctx->mode) { 1783 case CM_MHL3: 1784 sii8620_mt_read_xdevcap_reg(ctx, MHL_XDC_ECBUS_SPEEDS); 1785 sii8620_mt_set_cont(ctx, sii8620_got_ecbus_speed); 1786 break; 1787 case CM_ECBUS_S: 1788 sii8620_mt_read_devcap(ctx, true); 1789 break; 1790 default: 1791 break; 1792 } 1793 } 1794 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ) 1795 sii8620_send_features(ctx); 1796 if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) { 1797 ctx->feature_complete = true; 1798 if (ctx->edid) 1799 sii8620_enable_hpd(ctx); 1800 } 1801 } 1802 1803 static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx) 1804 { 1805 struct device *dev = ctx->dev; 1806 1807 if (list_empty(&ctx->mt_queue)) { 1808 dev_err(dev, "unexpected MSC MT response\n"); 1809 return NULL; 1810 } 1811 1812 return list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node); 1813 } 1814 1815 static void sii8620_msc_mt_done(struct sii8620 *ctx) 1816 { 1817 struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx); 1818 1819 if (!msg) 1820 return; 1821 1822 msg->ret = sii8620_readb(ctx, REG_MSC_MT_RCVD_DATA0); 1823 ctx->mt_state = MT_STATE_DONE; 1824 } 1825 1826 static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx) 1827 { 1828 struct sii8620_mt_msg *msg; 1829 u8 buf[2]; 1830 1831 sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2); 1832 1833 switch (buf[0]) { 1834 case MHL_MSC_MSG_RAPK: 1835 msg = sii8620_msc_msg_first(ctx); 1836 if (!msg) 1837 return; 1838 msg->ret = buf[1]; 1839 ctx->mt_state = MT_STATE_DONE; 1840 break; 1841 case MHL_MSC_MSG_RCP: 1842 if (!sii8620_rcp_consume(ctx, buf[1])) 1843 sii8620_mt_rcpe(ctx, 1844 MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE); 1845 sii8620_mt_rcpk(ctx, buf[1]); 1846 break; 1847 default: 1848 dev_err(ctx->dev, "%s message type %d,%d not supported", 1849 __func__, buf[0], buf[1]); 1850 } 1851 } 1852 1853 static void sii8620_irq_msc(struct sii8620 *ctx) 1854 { 1855 u8 stat = sii8620_readb(ctx, REG_CBUS_INT_0); 1856 1857 if (stat & ~BIT_CBUS_HPD_CHG) 1858 sii8620_write(ctx, REG_CBUS_INT_0, stat & ~BIT_CBUS_HPD_CHG); 1859 1860 if (stat & BIT_CBUS_HPD_CHG) { 1861 u8 cbus_stat = sii8620_readb(ctx, REG_CBUS_STATUS); 1862 1863 if ((cbus_stat ^ ctx->cbus_status) & BIT_CBUS_STATUS_CBUS_HPD) { 1864 sii8620_write(ctx, REG_CBUS_INT_0, BIT_CBUS_HPD_CHG); 1865 } else { 1866 stat ^= BIT_CBUS_STATUS_CBUS_HPD; 1867 cbus_stat ^= BIT_CBUS_STATUS_CBUS_HPD; 1868 } 1869 ctx->cbus_status = cbus_stat; 1870 } 1871 1872 if (stat & BIT_CBUS_MSC_MR_WRITE_STAT) 1873 sii8620_msc_mr_write_stat(ctx); 1874 1875 if (stat & BIT_CBUS_HPD_CHG) { 1876 if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD) { 1877 ctx->sink_detected = true; 1878 sii8620_identify_sink(ctx); 1879 } else { 1880 sii8620_hpd_unplugged(ctx); 1881 } 1882 } 1883 1884 if (stat & BIT_CBUS_MSC_MR_SET_INT) 1885 sii8620_msc_mr_set_int(ctx); 1886 1887 if (stat & BIT_CBUS_MSC_MT_DONE) 1888 sii8620_msc_mt_done(ctx); 1889 1890 if (stat & BIT_CBUS_MSC_MR_MSC_MSG) 1891 sii8620_msc_mr_msc_msg(ctx); 1892 } 1893 1894 static void sii8620_irq_coc(struct sii8620 *ctx) 1895 { 1896 u8 stat = sii8620_readb(ctx, REG_COC_INTR); 1897 1898 if (stat & BIT_COC_CALIBRATION_DONE) { 1899 u8 cstat = sii8620_readb(ctx, REG_COC_STAT_0); 1900 1901 cstat &= BIT_COC_STAT_0_PLL_LOCKED | MSK_COC_STAT_0_FSM_STATE; 1902 if (cstat == (BIT_COC_STAT_0_PLL_LOCKED | 0x02)) { 1903 sii8620_write_seq_static(ctx, 1904 REG_COC_CTLB, 0, 1905 REG_TRXINTMH, BIT_TDM_INTR_SYNC_DATA 1906 | BIT_TDM_INTR_SYNC_WAIT 1907 ); 1908 } 1909 } 1910 1911 sii8620_write(ctx, REG_COC_INTR, stat); 1912 } 1913 1914 static void sii8620_irq_merr(struct sii8620 *ctx) 1915 { 1916 u8 stat = sii8620_readb(ctx, REG_CBUS_INT_1); 1917 1918 sii8620_write(ctx, REG_CBUS_INT_1, stat); 1919 } 1920 1921 static void sii8620_irq_edid(struct sii8620 *ctx) 1922 { 1923 u8 stat = sii8620_readb(ctx, REG_INTR9); 1924 1925 sii8620_write(ctx, REG_INTR9, stat); 1926 1927 if (stat & BIT_INTR9_DEVCAP_DONE) 1928 ctx->mt_state = MT_STATE_DONE; 1929 } 1930 1931 static void sii8620_irq_scdt(struct sii8620 *ctx) 1932 { 1933 u8 stat = sii8620_readb(ctx, REG_INTR5); 1934 1935 if (stat & BIT_INTR_SCDT_CHANGE) { 1936 u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3); 1937 1938 if (cstat & BIT_TMDS_CSTAT_P3_SCDT) 1939 sii8620_start_video(ctx); 1940 } 1941 1942 sii8620_write(ctx, REG_INTR5, stat); 1943 } 1944 1945 static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret) 1946 { 1947 if (ret < 0) 1948 return; 1949 1950 sii8620_mt_read_devcap(ctx, false); 1951 } 1952 1953 static void sii8620_irq_tdm(struct sii8620 *ctx) 1954 { 1955 u8 stat = sii8620_readb(ctx, REG_TRXINTH); 1956 u8 tdm = sii8620_readb(ctx, REG_TRXSTA2); 1957 1958 if ((tdm & MSK_TDM_SYNCHRONIZED) == VAL_TDM_SYNCHRONIZED) { 1959 ctx->mode = CM_ECBUS_S; 1960 ctx->burst.rx_ack = 0; 1961 ctx->burst.r_size = SII8620_BURST_BUF_LEN; 1962 sii8620_burst_tx_rbuf_info(ctx, SII8620_BURST_BUF_LEN); 1963 sii8620_mt_read_devcap(ctx, true); 1964 sii8620_mt_set_cont(ctx, sii8620_got_xdevcap); 1965 } else { 1966 sii8620_write_seq_static(ctx, 1967 REG_MHL_PLL_CTL2, 0, 1968 REG_MHL_PLL_CTL2, BIT_MHL_PLL_CTL2_CLKDETECT_EN 1969 ); 1970 } 1971 1972 sii8620_write(ctx, REG_TRXINTH, stat); 1973 } 1974 1975 static void sii8620_irq_block(struct sii8620 *ctx) 1976 { 1977 u8 stat = sii8620_readb(ctx, REG_EMSCINTR); 1978 1979 if (stat & BIT_EMSCINTR_SPI_DVLD) { 1980 u8 bstat = sii8620_readb(ctx, REG_SPIBURSTSTAT); 1981 1982 if (bstat & BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE) 1983 sii8620_burst_receive(ctx); 1984 } 1985 1986 sii8620_write(ctx, REG_EMSCINTR, stat); 1987 } 1988 1989 static void sii8620_irq_ddc(struct sii8620 *ctx) 1990 { 1991 u8 stat = sii8620_readb(ctx, REG_INTR3); 1992 1993 if (stat & BIT_DDC_CMD_DONE) { 1994 sii8620_write(ctx, REG_INTR3_MASK, 0); 1995 if (sii8620_is_mhl3(ctx) && !ctx->feature_complete) 1996 sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), 1997 MHL_INT_RC_FEAT_REQ); 1998 else 1999 sii8620_enable_hpd(ctx); 2000 } 2001 sii8620_write(ctx, REG_INTR3, stat); 2002 } 2003 2004 /* endian agnostic, non-volatile version of test_bit */ 2005 static bool sii8620_test_bit(unsigned int nr, const u8 *addr) 2006 { 2007 return 1 & (addr[nr / BITS_PER_BYTE] >> (nr % BITS_PER_BYTE)); 2008 } 2009 2010 static irqreturn_t sii8620_irq_thread(int irq, void *data) 2011 { 2012 static const struct { 2013 int bit; 2014 void (*handler)(struct sii8620 *ctx); 2015 } irq_vec[] = { 2016 { BIT_FAST_INTR_STAT_DISC, sii8620_irq_disc }, 2017 { BIT_FAST_INTR_STAT_G2WB, sii8620_irq_g2wb }, 2018 { BIT_FAST_INTR_STAT_COC, sii8620_irq_coc }, 2019 { BIT_FAST_INTR_STAT_TDM, sii8620_irq_tdm }, 2020 { BIT_FAST_INTR_STAT_MSC, sii8620_irq_msc }, 2021 { BIT_FAST_INTR_STAT_MERR, sii8620_irq_merr }, 2022 { BIT_FAST_INTR_STAT_BLOCK, sii8620_irq_block }, 2023 { BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid }, 2024 { BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc }, 2025 { BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt }, 2026 }; 2027 struct sii8620 *ctx = data; 2028 u8 stats[LEN_FAST_INTR_STAT]; 2029 int i, ret; 2030 2031 mutex_lock(&ctx->lock); 2032 2033 sii8620_read_buf(ctx, REG_FAST_INTR_STAT, stats, ARRAY_SIZE(stats)); 2034 for (i = 0; i < ARRAY_SIZE(irq_vec); ++i) 2035 if (sii8620_test_bit(irq_vec[i].bit, stats)) 2036 irq_vec[i].handler(ctx); 2037 2038 sii8620_burst_rx_all(ctx); 2039 sii8620_mt_work(ctx); 2040 sii8620_burst_send(ctx); 2041 2042 ret = sii8620_clear_error(ctx); 2043 if (ret) { 2044 dev_err(ctx->dev, "Error during IRQ handling, %d.\n", ret); 2045 sii8620_mhl_disconnected(ctx); 2046 } 2047 mutex_unlock(&ctx->lock); 2048 2049 return IRQ_HANDLED; 2050 } 2051 2052 static void sii8620_cable_in(struct sii8620 *ctx) 2053 { 2054 struct device *dev = ctx->dev; 2055 u8 ver[5]; 2056 int ret; 2057 2058 ret = sii8620_hw_on(ctx); 2059 if (ret) { 2060 dev_err(dev, "Error powering on, %d.\n", ret); 2061 return; 2062 } 2063 2064 sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver)); 2065 ret = sii8620_clear_error(ctx); 2066 if (ret) { 2067 dev_err(dev, "Error accessing I2C bus, %d.\n", ret); 2068 return; 2069 } 2070 2071 dev_info(dev, "ChipID %02x%02x:%02x%02x rev %02x.\n", ver[1], ver[0], 2072 ver[3], ver[2], ver[4]); 2073 2074 sii8620_write(ctx, REG_DPD, 2075 BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN); 2076 2077 sii8620_xtal_set_rate(ctx); 2078 sii8620_disconnect(ctx); 2079 2080 sii8620_write_seq_static(ctx, 2081 REG_MHL_CBUS_CTL0, VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG 2082 | VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734, 2083 REG_MHL_CBUS_CTL1, VAL_MHL_CBUS_CTL1_1115_OHM, 2084 REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN, 2085 ); 2086 2087 ret = sii8620_clear_error(ctx); 2088 if (ret) { 2089 dev_err(dev, "Error accessing I2C bus, %d.\n", ret); 2090 return; 2091 } 2092 2093 enable_irq(to_i2c_client(ctx->dev)->irq); 2094 } 2095 2096 static void sii8620_init_rcp_input_dev(struct sii8620 *ctx) 2097 { 2098 struct rc_dev *rc_dev; 2099 int ret; 2100 2101 if (!IS_ENABLED(CONFIG_RC_CORE)) 2102 return; 2103 2104 rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE); 2105 if (!rc_dev) { 2106 dev_err(ctx->dev, "Failed to allocate RC device\n"); 2107 ctx->error = -ENOMEM; 2108 return; 2109 } 2110 2111 rc_dev->input_phys = "sii8620/input0"; 2112 rc_dev->input_id.bustype = BUS_VIRTUAL; 2113 rc_dev->map_name = RC_MAP_CEC; 2114 rc_dev->allowed_protocols = RC_PROTO_BIT_CEC; 2115 rc_dev->driver_name = "sii8620"; 2116 rc_dev->device_name = "sii8620"; 2117 2118 ret = rc_register_device(rc_dev); 2119 2120 if (ret) { 2121 dev_err(ctx->dev, "Failed to register RC device\n"); 2122 ctx->error = ret; 2123 rc_free_device(ctx->rc_dev); 2124 return; 2125 } 2126 ctx->rc_dev = rc_dev; 2127 } 2128 2129 static void sii8620_cable_out(struct sii8620 *ctx) 2130 { 2131 disable_irq(to_i2c_client(ctx->dev)->irq); 2132 sii8620_hw_off(ctx); 2133 } 2134 2135 static void sii8620_extcon_work(struct work_struct *work) 2136 { 2137 struct sii8620 *ctx = 2138 container_of(work, struct sii8620, extcon_wq); 2139 int state = extcon_get_state(ctx->extcon, EXTCON_DISP_MHL); 2140 2141 if (state == ctx->cable_state) 2142 return; 2143 2144 ctx->cable_state = state; 2145 2146 if (state > 0) 2147 sii8620_cable_in(ctx); 2148 else 2149 sii8620_cable_out(ctx); 2150 } 2151 2152 static int sii8620_extcon_notifier(struct notifier_block *self, 2153 unsigned long event, void *ptr) 2154 { 2155 struct sii8620 *ctx = 2156 container_of(self, struct sii8620, extcon_nb); 2157 2158 schedule_work(&ctx->extcon_wq); 2159 2160 return NOTIFY_DONE; 2161 } 2162 2163 static int sii8620_extcon_init(struct sii8620 *ctx) 2164 { 2165 struct extcon_dev *edev; 2166 struct device_node *musb, *muic; 2167 int ret; 2168 2169 /* get micro-USB connector node */ 2170 musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1); 2171 /* next get micro-USB Interface Controller node */ 2172 muic = of_get_next_parent(musb); 2173 2174 if (!muic) { 2175 dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n"); 2176 return 0; 2177 } 2178 2179 edev = extcon_find_edev_by_node(muic); 2180 of_node_put(muic); 2181 if (IS_ERR(edev)) { 2182 if (PTR_ERR(edev) == -EPROBE_DEFER) 2183 return -EPROBE_DEFER; 2184 dev_err(ctx->dev, "Invalid or missing extcon\n"); 2185 return PTR_ERR(edev); 2186 } 2187 2188 ctx->extcon = edev; 2189 ctx->extcon_nb.notifier_call = sii8620_extcon_notifier; 2190 INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work); 2191 ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb); 2192 if (ret) { 2193 dev_err(ctx->dev, "failed to register notifier for MHL\n"); 2194 return ret; 2195 } 2196 2197 return 0; 2198 } 2199 2200 static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge) 2201 { 2202 return container_of(bridge, struct sii8620, bridge); 2203 } 2204 2205 static int sii8620_attach(struct drm_bridge *bridge) 2206 { 2207 struct sii8620 *ctx = bridge_to_sii8620(bridge); 2208 2209 sii8620_init_rcp_input_dev(ctx); 2210 2211 return sii8620_clear_error(ctx); 2212 } 2213 2214 static void sii8620_detach(struct drm_bridge *bridge) 2215 { 2216 struct sii8620 *ctx = bridge_to_sii8620(bridge); 2217 2218 if (!IS_ENABLED(CONFIG_RC_CORE)) 2219 return; 2220 2221 rc_unregister_device(ctx->rc_dev); 2222 } 2223 2224 static int sii8620_is_packing_required(struct sii8620 *ctx, 2225 const struct drm_display_mode *mode) 2226 { 2227 int max_pclk, max_pclk_pp_mode; 2228 2229 if (sii8620_is_mhl3(ctx)) { 2230 max_pclk = MHL3_MAX_PCLK; 2231 max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE; 2232 } else { 2233 max_pclk = MHL1_MAX_PCLK; 2234 max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE; 2235 } 2236 2237 if (mode->clock < max_pclk) 2238 return 0; 2239 else if (mode->clock < max_pclk_pp_mode) 2240 return 1; 2241 else 2242 return -1; 2243 } 2244 2245 static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge, 2246 const struct drm_display_mode *mode) 2247 { 2248 struct sii8620 *ctx = bridge_to_sii8620(bridge); 2249 int pack_required = sii8620_is_packing_required(ctx, mode); 2250 bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] & 2251 MHL_DCAP_VID_LINK_PPIXEL; 2252 2253 switch (pack_required) { 2254 case 0: 2255 return MODE_OK; 2256 case 1: 2257 return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH; 2258 default: 2259 return MODE_CLOCK_HIGH; 2260 } 2261 } 2262 2263 static bool sii8620_mode_fixup(struct drm_bridge *bridge, 2264 const struct drm_display_mode *mode, 2265 struct drm_display_mode *adjusted_mode) 2266 { 2267 struct sii8620 *ctx = bridge_to_sii8620(bridge); 2268 2269 mutex_lock(&ctx->lock); 2270 2271 ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode); 2272 2273 mutex_unlock(&ctx->lock); 2274 2275 return true; 2276 } 2277 2278 static const struct drm_bridge_funcs sii8620_bridge_funcs = { 2279 .attach = sii8620_attach, 2280 .detach = sii8620_detach, 2281 .mode_fixup = sii8620_mode_fixup, 2282 .mode_valid = sii8620_mode_valid, 2283 }; 2284 2285 static int sii8620_probe(struct i2c_client *client, 2286 const struct i2c_device_id *id) 2287 { 2288 struct device *dev = &client->dev; 2289 struct sii8620 *ctx; 2290 int ret; 2291 2292 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 2293 if (!ctx) 2294 return -ENOMEM; 2295 2296 ctx->dev = dev; 2297 mutex_init(&ctx->lock); 2298 INIT_LIST_HEAD(&ctx->mt_queue); 2299 2300 ctx->clk_xtal = devm_clk_get(dev, "xtal"); 2301 if (IS_ERR(ctx->clk_xtal)) { 2302 dev_err(dev, "failed to get xtal clock from DT\n"); 2303 return PTR_ERR(ctx->clk_xtal); 2304 } 2305 2306 if (!client->irq) { 2307 dev_err(dev, "no irq provided\n"); 2308 return -EINVAL; 2309 } 2310 irq_set_status_flags(client->irq, IRQ_NOAUTOEN); 2311 ret = devm_request_threaded_irq(dev, client->irq, NULL, 2312 sii8620_irq_thread, 2313 IRQF_TRIGGER_HIGH | IRQF_ONESHOT, 2314 "sii8620", ctx); 2315 if (ret < 0) { 2316 dev_err(dev, "failed to install IRQ handler\n"); 2317 return ret; 2318 } 2319 2320 ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 2321 if (IS_ERR(ctx->gpio_reset)) { 2322 dev_err(dev, "failed to get reset gpio from DT\n"); 2323 return PTR_ERR(ctx->gpio_reset); 2324 } 2325 2326 ctx->supplies[0].supply = "cvcc10"; 2327 ctx->supplies[1].supply = "iovcc18"; 2328 ret = devm_regulator_bulk_get(dev, 2, ctx->supplies); 2329 if (ret) 2330 return ret; 2331 2332 ret = sii8620_extcon_init(ctx); 2333 if (ret < 0) { 2334 dev_err(ctx->dev, "failed to initialize EXTCON\n"); 2335 return ret; 2336 } 2337 2338 i2c_set_clientdata(client, ctx); 2339 2340 ctx->bridge.funcs = &sii8620_bridge_funcs; 2341 ctx->bridge.of_node = dev->of_node; 2342 drm_bridge_add(&ctx->bridge); 2343 2344 if (!ctx->extcon) 2345 sii8620_cable_in(ctx); 2346 2347 return 0; 2348 } 2349 2350 static int sii8620_remove(struct i2c_client *client) 2351 { 2352 struct sii8620 *ctx = i2c_get_clientdata(client); 2353 2354 if (ctx->extcon) { 2355 extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL, 2356 &ctx->extcon_nb); 2357 flush_work(&ctx->extcon_wq); 2358 if (ctx->cable_state > 0) 2359 sii8620_cable_out(ctx); 2360 } else { 2361 sii8620_cable_out(ctx); 2362 } 2363 drm_bridge_remove(&ctx->bridge); 2364 2365 return 0; 2366 } 2367 2368 static const struct of_device_id sii8620_dt_match[] = { 2369 { .compatible = "sil,sii8620" }, 2370 { }, 2371 }; 2372 MODULE_DEVICE_TABLE(of, sii8620_dt_match); 2373 2374 static const struct i2c_device_id sii8620_id[] = { 2375 { "sii8620", 0 }, 2376 { }, 2377 }; 2378 2379 MODULE_DEVICE_TABLE(i2c, sii8620_id); 2380 static struct i2c_driver sii8620_driver = { 2381 .driver = { 2382 .name = "sii8620", 2383 .of_match_table = of_match_ptr(sii8620_dt_match), 2384 }, 2385 .probe = sii8620_probe, 2386 .remove = sii8620_remove, 2387 .id_table = sii8620_id, 2388 }; 2389 2390 module_i2c_driver(sii8620_driver); 2391 MODULE_LICENSE("GPL v2"); 2392