1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright(c) 2020, Analogix Semiconductor. All rights reserved. 4 * 5 */ 6 #include <linux/gcd.h> 7 #include <linux/gpio/consumer.h> 8 #include <linux/i2c.h> 9 #include <linux/interrupt.h> 10 #include <linux/iopoll.h> 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/mutex.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 #include <linux/workqueue.h> 19 20 #include <linux/of_graph.h> 21 #include <linux/of_platform.h> 22 23 #include <drm/display/drm_dp_aux_bus.h> 24 #include <drm/display/drm_dp_helper.h> 25 #include <drm/display/drm_hdcp_helper.h> 26 #include <drm/drm_atomic_helper.h> 27 #include <drm/drm_bridge.h> 28 #include <drm/drm_edid.h> 29 #include <drm/drm_mipi_dsi.h> 30 #include <drm/drm_of.h> 31 #include <drm/drm_panel.h> 32 #include <drm/drm_print.h> 33 #include <drm/drm_probe_helper.h> 34 35 #include <media/v4l2-fwnode.h> 36 #include <sound/hdmi-codec.h> 37 #include <video/display_timing.h> 38 39 #include "anx7625.h" 40 41 /* 42 * There is a sync issue while access I2C register between AP(CPU) and 43 * internal firmware(OCM), to avoid the race condition, AP should access 44 * the reserved slave address before slave address occurs changes. 45 */ 46 static int i2c_access_workaround(struct anx7625_data *ctx, 47 struct i2c_client *client) 48 { 49 u8 offset; 50 struct device *dev = &client->dev; 51 int ret; 52 53 if (client == ctx->last_client) 54 return 0; 55 56 ctx->last_client = client; 57 58 if (client == ctx->i2c.tcpc_client) 59 offset = RSVD_00_ADDR; 60 else if (client == ctx->i2c.tx_p0_client) 61 offset = RSVD_D1_ADDR; 62 else if (client == ctx->i2c.tx_p1_client) 63 offset = RSVD_60_ADDR; 64 else if (client == ctx->i2c.rx_p0_client) 65 offset = RSVD_39_ADDR; 66 else if (client == ctx->i2c.rx_p1_client) 67 offset = RSVD_7F_ADDR; 68 else 69 offset = RSVD_00_ADDR; 70 71 ret = i2c_smbus_write_byte_data(client, offset, 0x00); 72 if (ret < 0) 73 DRM_DEV_ERROR(dev, 74 "fail to access i2c id=%x\n:%x", 75 client->addr, offset); 76 77 return ret; 78 } 79 80 static int anx7625_reg_read(struct anx7625_data *ctx, 81 struct i2c_client *client, u8 reg_addr) 82 { 83 int ret; 84 struct device *dev = &client->dev; 85 86 i2c_access_workaround(ctx, client); 87 88 ret = i2c_smbus_read_byte_data(client, reg_addr); 89 if (ret < 0) 90 DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n", 91 client->addr, reg_addr); 92 93 return ret; 94 } 95 96 static int anx7625_reg_block_read(struct anx7625_data *ctx, 97 struct i2c_client *client, 98 u8 reg_addr, u8 len, u8 *buf) 99 { 100 int ret; 101 struct device *dev = &client->dev; 102 103 i2c_access_workaround(ctx, client); 104 105 ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf); 106 if (ret < 0) 107 DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n", 108 client->addr, reg_addr); 109 110 return ret; 111 } 112 113 static int anx7625_reg_write(struct anx7625_data *ctx, 114 struct i2c_client *client, 115 u8 reg_addr, u8 reg_val) 116 { 117 int ret; 118 struct device *dev = &client->dev; 119 120 i2c_access_workaround(ctx, client); 121 122 ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val); 123 124 if (ret < 0) 125 DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x", 126 client->addr, reg_addr); 127 128 return ret; 129 } 130 131 static int anx7625_reg_block_write(struct anx7625_data *ctx, 132 struct i2c_client *client, 133 u8 reg_addr, u8 len, u8 *buf) 134 { 135 int ret; 136 struct device *dev = &client->dev; 137 138 i2c_access_workaround(ctx, client); 139 140 ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf); 141 if (ret < 0) 142 dev_err(dev, "write i2c block failed id=%x\n:%x", 143 client->addr, reg_addr); 144 145 return ret; 146 } 147 148 static int anx7625_write_or(struct anx7625_data *ctx, 149 struct i2c_client *client, 150 u8 offset, u8 mask) 151 { 152 int val; 153 154 val = anx7625_reg_read(ctx, client, offset); 155 if (val < 0) 156 return val; 157 158 return anx7625_reg_write(ctx, client, offset, (val | (mask))); 159 } 160 161 static int anx7625_write_and(struct anx7625_data *ctx, 162 struct i2c_client *client, 163 u8 offset, u8 mask) 164 { 165 int val; 166 167 val = anx7625_reg_read(ctx, client, offset); 168 if (val < 0) 169 return val; 170 171 return anx7625_reg_write(ctx, client, offset, (val & (mask))); 172 } 173 174 static int anx7625_write_and_or(struct anx7625_data *ctx, 175 struct i2c_client *client, 176 u8 offset, u8 and_mask, u8 or_mask) 177 { 178 int val; 179 180 val = anx7625_reg_read(ctx, client, offset); 181 if (val < 0) 182 return val; 183 184 return anx7625_reg_write(ctx, client, 185 offset, (val & and_mask) | (or_mask)); 186 } 187 188 static int anx7625_config_bit_matrix(struct anx7625_data *ctx) 189 { 190 int i, ret; 191 192 ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, 193 AUDIO_CONTROL_REGISTER, 0x80); 194 for (i = 0; i < 13; i++) 195 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, 196 VIDEO_BIT_MATRIX_12 + i, 197 0x18 + i); 198 199 return ret; 200 } 201 202 static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx) 203 { 204 return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS); 205 } 206 207 static int wait_aux_op_finish(struct anx7625_data *ctx) 208 { 209 struct device *dev = &ctx->client->dev; 210 int val; 211 int ret; 212 213 ret = readx_poll_timeout(anx7625_read_ctrl_status_p0, 214 ctx, val, 215 (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)), 216 2000, 217 2000 * 150); 218 if (ret) { 219 DRM_DEV_ERROR(dev, "aux operation fail!\n"); 220 return -EIO; 221 } 222 223 val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, 224 AP_AUX_CTRL_STATUS); 225 if (val < 0 || (val & 0x0F)) { 226 DRM_DEV_ERROR(dev, "aux status %02x\n", val); 227 return -EIO; 228 } 229 230 return 0; 231 } 232 233 static int anx7625_aux_trans(struct anx7625_data *ctx, u8 op, u32 address, 234 u8 len, u8 *buf) 235 { 236 struct device *dev = &ctx->client->dev; 237 int ret; 238 u8 addrh, addrm, addrl; 239 u8 cmd; 240 bool is_write = !(op & DP_AUX_I2C_READ); 241 242 if (len > DP_AUX_MAX_PAYLOAD_BYTES) { 243 dev_err(dev, "exceed aux buffer len.\n"); 244 return -EINVAL; 245 } 246 247 if (!len) 248 return len; 249 250 addrl = address & 0xFF; 251 addrm = (address >> 8) & 0xFF; 252 addrh = (address >> 16) & 0xFF; 253 254 if (!is_write) 255 op &= ~DP_AUX_I2C_MOT; 256 cmd = DPCD_CMD(len, op); 257 258 /* Set command and length */ 259 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 260 AP_AUX_COMMAND, cmd); 261 262 /* Set aux access address */ 263 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 264 AP_AUX_ADDR_7_0, addrl); 265 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 266 AP_AUX_ADDR_15_8, addrm); 267 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 268 AP_AUX_ADDR_19_16, addrh); 269 270 if (is_write) 271 ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, 272 AP_AUX_BUFF_START, len, buf); 273 /* Enable aux access */ 274 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 275 AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); 276 277 if (ret < 0) { 278 dev_err(dev, "cannot access aux related register.\n"); 279 return -EIO; 280 } 281 282 ret = wait_aux_op_finish(ctx); 283 if (ret < 0) { 284 dev_err(dev, "aux IO error: wait aux op finish.\n"); 285 return ret; 286 } 287 288 /* Write done */ 289 if (is_write) 290 return len; 291 292 /* Read done, read out dpcd data */ 293 ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, 294 AP_AUX_BUFF_START, len, buf); 295 if (ret < 0) { 296 dev_err(dev, "read dpcd register failed\n"); 297 return -EIO; 298 } 299 300 return len; 301 } 302 303 static int anx7625_video_mute_control(struct anx7625_data *ctx, 304 u8 status) 305 { 306 int ret; 307 308 if (status) { 309 /* Set mute on flag */ 310 ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 311 AP_AV_STATUS, AP_MIPI_MUTE); 312 /* Clear mipi RX en */ 313 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 314 AP_AV_STATUS, (u8)~AP_MIPI_RX_EN); 315 } else { 316 /* Mute off flag */ 317 ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 318 AP_AV_STATUS, (u8)~AP_MIPI_MUTE); 319 /* Set MIPI RX EN */ 320 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 321 AP_AV_STATUS, AP_MIPI_RX_EN); 322 } 323 324 return ret; 325 } 326 327 /* Reduction of fraction a/b */ 328 static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b) 329 { 330 unsigned long gcd_num; 331 unsigned long tmp_a, tmp_b; 332 u32 i = 1; 333 334 gcd_num = gcd(*a, *b); 335 *a /= gcd_num; 336 *b /= gcd_num; 337 338 tmp_a = *a; 339 tmp_b = *b; 340 341 while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) { 342 i++; 343 *a = tmp_a / i; 344 *b = tmp_b / i; 345 } 346 347 /* 348 * In the end, make a, b larger to have higher ODFC PLL 349 * output frequency accuracy 350 */ 351 while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) { 352 *a <<= 1; 353 *b <<= 1; 354 } 355 356 *a >>= 1; 357 *b >>= 1; 358 } 359 360 static int anx7625_calculate_m_n(u32 pixelclock, 361 unsigned long *m, 362 unsigned long *n, 363 u8 *post_divider) 364 { 365 if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) { 366 /* Pixel clock frequency is too high */ 367 DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n", 368 pixelclock, 369 PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN); 370 return -EINVAL; 371 } 372 373 if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) { 374 /* Pixel clock frequency is too low */ 375 DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n", 376 pixelclock, 377 PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX); 378 return -EINVAL; 379 } 380 381 for (*post_divider = 1; 382 pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));) 383 *post_divider += 1; 384 385 if (*post_divider > POST_DIVIDER_MAX) { 386 for (*post_divider = 1; 387 (pixelclock < 388 (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));) 389 *post_divider += 1; 390 391 if (*post_divider > POST_DIVIDER_MAX) { 392 DRM_ERROR("cannot find property post_divider(%d)\n", 393 *post_divider); 394 return -EDOM; 395 } 396 } 397 398 /* Patch to improve the accuracy */ 399 if (*post_divider == 7) { 400 /* 27,000,000 is not divisible by 7 */ 401 *post_divider = 8; 402 } else if (*post_divider == 11) { 403 /* 27,000,000 is not divisible by 11 */ 404 *post_divider = 12; 405 } else if ((*post_divider == 13) || (*post_divider == 14)) { 406 /* 27,000,000 is not divisible by 13 or 14 */ 407 *post_divider = 15; 408 } 409 410 if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) { 411 DRM_ERROR("act clock(%u) large than maximum(%lu)\n", 412 pixelclock * (*post_divider), 413 PLL_OUT_FREQ_ABS_MAX); 414 return -EDOM; 415 } 416 417 *m = pixelclock; 418 *n = XTAL_FRQ / (*post_divider); 419 420 anx7625_reduction_of_a_fraction(m, n); 421 422 return 0; 423 } 424 425 static int anx7625_odfc_config(struct anx7625_data *ctx, 426 u8 post_divider) 427 { 428 int ret; 429 struct device *dev = &ctx->client->dev; 430 431 /* Config input reference clock frequency 27MHz/19.2MHz */ 432 ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16, 433 ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND)); 434 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16, 435 (REF_CLK_27000KHZ << MIPI_FREF_D_IND)); 436 /* Post divider */ 437 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 438 MIPI_DIGITAL_PLL_8, 0x0f); 439 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8, 440 post_divider << 4); 441 442 /* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */ 443 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7, 444 ~MIPI_PLL_VCO_TUNE_REG_VAL); 445 446 /* Reset ODFC PLL */ 447 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7, 448 ~MIPI_PLL_RESET_N); 449 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7, 450 MIPI_PLL_RESET_N); 451 452 if (ret < 0) 453 DRM_DEV_ERROR(dev, "IO error.\n"); 454 455 return ret; 456 } 457 458 /* 459 * The MIPI source video data exist large variation (e.g. 59Hz ~ 61Hz), 460 * anx7625 defined K ratio for matching MIPI input video clock and 461 * DP output video clock. Increase K value can match bigger video data 462 * variation. IVO panel has small variation than DP CTS spec, need 463 * decrease the K value. 464 */ 465 static int anx7625_set_k_value(struct anx7625_data *ctx) 466 { 467 struct edid *edid = (struct edid *)ctx->slimport_edid_p.edid_raw_data; 468 469 if (edid->mfg_id[0] == IVO_MID0 && edid->mfg_id[1] == IVO_MID1) 470 return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 471 MIPI_DIGITAL_ADJ_1, 0x3B); 472 473 return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 474 MIPI_DIGITAL_ADJ_1, 0x3D); 475 } 476 477 static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx) 478 { 479 struct device *dev = &ctx->client->dev; 480 unsigned long m, n; 481 u16 htotal; 482 int ret; 483 u8 post_divider = 0; 484 485 ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000, 486 &m, &n, &post_divider); 487 488 if (ret) { 489 DRM_DEV_ERROR(dev, "cannot get property m n value.\n"); 490 return ret; 491 } 492 493 DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n", 494 m, n, post_divider); 495 496 /* Configure pixel clock */ 497 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L, 498 (ctx->dt.pixelclock.min / 1000) & 0xFF); 499 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H, 500 (ctx->dt.pixelclock.min / 1000) >> 8); 501 /* Lane count */ 502 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 503 MIPI_LANE_CTRL_0, 0xfc); 504 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 505 MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1); 506 507 /* Htotal */ 508 htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min + 509 ctx->dt.hback_porch.min + ctx->dt.hsync_len.min; 510 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 511 HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF); 512 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 513 HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8); 514 /* Hactive */ 515 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 516 HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF); 517 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 518 HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8); 519 /* HFP */ 520 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 521 HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min); 522 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 523 HORIZONTAL_FRONT_PORCH_H, 524 ctx->dt.hfront_porch.min >> 8); 525 /* HWS */ 526 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 527 HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min); 528 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 529 HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8); 530 /* HBP */ 531 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 532 HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min); 533 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 534 HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8); 535 /* Vactive */ 536 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L, 537 ctx->dt.vactive.min); 538 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H, 539 ctx->dt.vactive.min >> 8); 540 /* VFP */ 541 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 542 VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min); 543 /* VWS */ 544 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 545 VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min); 546 /* VBP */ 547 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, 548 VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min); 549 /* M value */ 550 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 551 MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff); 552 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 553 MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff); 554 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 555 MIPI_PLL_M_NUM_7_0, (m & 0xff)); 556 /* N value */ 557 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 558 MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff); 559 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 560 MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff); 561 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0, 562 (n & 0xff)); 563 564 anx7625_set_k_value(ctx); 565 566 ret |= anx7625_odfc_config(ctx, post_divider - 1); 567 568 if (ret < 0) 569 DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n"); 570 571 return ret; 572 } 573 574 static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx) 575 { 576 int val; 577 struct device *dev = &ctx->client->dev; 578 579 /* Swap MIPI-DSI data lane 3 P and N */ 580 val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP); 581 if (val < 0) { 582 DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n"); 583 return -EIO; 584 } 585 586 val |= (1 << MIPI_SWAP_CH3); 587 return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val); 588 } 589 590 static int anx7625_api_dsi_config(struct anx7625_data *ctx) 591 592 { 593 int val, ret; 594 struct device *dev = &ctx->client->dev; 595 596 /* Swap MIPI-DSI data lane 3 P and N */ 597 ret = anx7625_swap_dsi_lane3(ctx); 598 if (ret < 0) { 599 DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n"); 600 return ret; 601 } 602 603 /* DSI clock settings */ 604 val = (0 << MIPI_HS_PWD_CLK) | 605 (0 << MIPI_HS_RT_CLK) | 606 (0 << MIPI_PD_CLK) | 607 (1 << MIPI_CLK_RT_MANUAL_PD_EN) | 608 (1 << MIPI_CLK_HS_MANUAL_PD_EN) | 609 (0 << MIPI_CLK_DET_DET_BYPASS) | 610 (0 << MIPI_CLK_MISS_CTRL) | 611 (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN); 612 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 613 MIPI_PHY_CONTROL_3, val); 614 615 /* 616 * Decreased HS prepare timing delay from 160ns to 80ns work with 617 * a) Dragon board 810 series (Qualcomm AP) 618 * b) Moving Pixel DSI source (PG3A pattern generator + 619 * P332 D-PHY Probe) default D-PHY timing 620 * 5ns/step 621 */ 622 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 623 MIPI_TIME_HS_PRPR, 0x10); 624 625 /* Enable DSI mode*/ 626 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18, 627 SELECT_DSI << MIPI_DPI_SELECT); 628 629 ret |= anx7625_dsi_video_timing_config(ctx); 630 if (ret < 0) { 631 DRM_DEV_ERROR(dev, "dsi video timing config fail\n"); 632 return ret; 633 } 634 635 /* Toggle m, n ready */ 636 ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6, 637 ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY)); 638 usleep_range(1000, 1100); 639 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6, 640 MIPI_M_NUM_READY | MIPI_N_NUM_READY); 641 642 /* Configure integer stable register */ 643 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 644 MIPI_VIDEO_STABLE_CNT, 0x02); 645 /* Power on MIPI RX */ 646 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 647 MIPI_LANE_CTRL_10, 0x00); 648 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 649 MIPI_LANE_CTRL_10, 0x80); 650 651 if (ret < 0) 652 DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n"); 653 654 return ret; 655 } 656 657 static int anx7625_dsi_config(struct anx7625_data *ctx) 658 { 659 struct device *dev = &ctx->client->dev; 660 int ret; 661 662 DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n"); 663 664 /* DSC disable */ 665 ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 666 R_DSC_CTRL_0, ~DSC_EN); 667 668 ret |= anx7625_api_dsi_config(ctx); 669 670 if (ret < 0) { 671 DRM_DEV_ERROR(dev, "IO error : api dsi config error.\n"); 672 return ret; 673 } 674 675 /* Set MIPI RX EN */ 676 ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 677 AP_AV_STATUS, AP_MIPI_RX_EN); 678 /* Clear mute flag */ 679 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 680 AP_AV_STATUS, (u8)~AP_MIPI_MUTE); 681 if (ret < 0) 682 DRM_DEV_ERROR(dev, "IO error : enable mipi rx fail.\n"); 683 else 684 DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n"); 685 686 return ret; 687 } 688 689 static int anx7625_api_dpi_config(struct anx7625_data *ctx) 690 { 691 struct device *dev = &ctx->client->dev; 692 u16 freq = ctx->dt.pixelclock.min / 1000; 693 int ret; 694 695 /* configure pixel clock */ 696 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 697 PIXEL_CLOCK_L, freq & 0xFF); 698 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 699 PIXEL_CLOCK_H, (freq >> 8)); 700 701 /* set DPI mode */ 702 /* set to DPI PLL module sel */ 703 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 704 MIPI_DIGITAL_PLL_9, 0x20); 705 /* power down MIPI */ 706 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 707 MIPI_LANE_CTRL_10, 0x08); 708 /* enable DPI mode */ 709 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, 710 MIPI_DIGITAL_PLL_18, 0x1C); 711 /* set first edge */ 712 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, 713 VIDEO_CONTROL_0, 0x06); 714 if (ret < 0) 715 DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n"); 716 717 return ret; 718 } 719 720 static int anx7625_dpi_config(struct anx7625_data *ctx) 721 { 722 struct device *dev = &ctx->client->dev; 723 int ret; 724 725 DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n"); 726 727 /* DSC disable */ 728 ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 729 R_DSC_CTRL_0, ~DSC_EN); 730 if (ret < 0) { 731 DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n"); 732 return ret; 733 } 734 735 ret = anx7625_config_bit_matrix(ctx); 736 if (ret < 0) { 737 DRM_DEV_ERROR(dev, "config bit matrix failed.\n"); 738 return ret; 739 } 740 741 ret = anx7625_api_dpi_config(ctx); 742 if (ret < 0) { 743 DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n"); 744 return ret; 745 } 746 747 /* set MIPI RX EN */ 748 ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 749 AP_AV_STATUS, AP_MIPI_RX_EN); 750 /* clear mute flag */ 751 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 752 AP_AV_STATUS, (u8)~AP_MIPI_MUTE); 753 if (ret < 0) 754 DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n"); 755 756 return ret; 757 } 758 759 static int anx7625_read_flash_status(struct anx7625_data *ctx) 760 { 761 return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, R_RAM_CTRL); 762 } 763 764 static int anx7625_hdcp_key_probe(struct anx7625_data *ctx) 765 { 766 int ret, val; 767 struct device *dev = &ctx->client->dev; 768 u8 ident[FLASH_BUF_LEN]; 769 770 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 771 FLASH_ADDR_HIGH, 0x91); 772 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 773 FLASH_ADDR_LOW, 0xA0); 774 if (ret < 0) { 775 dev_err(dev, "IO error : set key flash address.\n"); 776 return ret; 777 } 778 779 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 780 FLASH_LEN_HIGH, (FLASH_BUF_LEN - 1) >> 8); 781 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 782 FLASH_LEN_LOW, (FLASH_BUF_LEN - 1) & 0xFF); 783 if (ret < 0) { 784 dev_err(dev, "IO error : set key flash len.\n"); 785 return ret; 786 } 787 788 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 789 R_FLASH_RW_CTRL, FLASH_READ); 790 ret |= readx_poll_timeout(anx7625_read_flash_status, 791 ctx, val, 792 ((val & FLASH_DONE) || (val < 0)), 793 2000, 794 2000 * 150); 795 if (ret) { 796 dev_err(dev, "flash read access fail!\n"); 797 return -EIO; 798 } 799 800 ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, 801 FLASH_BUF_BASE_ADDR, 802 FLASH_BUF_LEN, ident); 803 if (ret < 0) { 804 dev_err(dev, "read flash data fail!\n"); 805 return -EIO; 806 } 807 808 if (ident[29] == 0xFF && ident[30] == 0xFF && ident[31] == 0xFF) 809 return -EINVAL; 810 811 return 0; 812 } 813 814 static int anx7625_hdcp_key_load(struct anx7625_data *ctx) 815 { 816 int ret; 817 struct device *dev = &ctx->client->dev; 818 819 /* Select HDCP 1.4 KEY */ 820 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 821 R_BOOT_RETRY, 0x12); 822 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 823 FLASH_ADDR_HIGH, HDCP14KEY_START_ADDR >> 8); 824 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 825 FLASH_ADDR_LOW, HDCP14KEY_START_ADDR & 0xFF); 826 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 827 R_RAM_LEN_H, HDCP14KEY_SIZE >> 12); 828 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 829 R_RAM_LEN_L, HDCP14KEY_SIZE >> 4); 830 831 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 832 R_RAM_ADDR_H, 0); 833 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 834 R_RAM_ADDR_L, 0); 835 /* Enable HDCP 1.4 KEY load */ 836 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 837 R_RAM_CTRL, DECRYPT_EN | LOAD_START); 838 dev_dbg(dev, "load HDCP 1.4 key done\n"); 839 return ret; 840 } 841 842 static int anx7625_hdcp_disable(struct anx7625_data *ctx) 843 { 844 int ret; 845 struct device *dev = &ctx->client->dev; 846 847 dev_dbg(dev, "disable HDCP 1.4\n"); 848 849 /* Disable HDCP */ 850 ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f); 851 /* Try auth flag */ 852 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10); 853 /* Interrupt for DRM */ 854 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01); 855 if (ret < 0) 856 dev_err(dev, "fail to disable HDCP\n"); 857 858 return anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 859 TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF); 860 } 861 862 static int anx7625_hdcp_enable(struct anx7625_data *ctx) 863 { 864 u8 bcap; 865 int ret; 866 struct device *dev = &ctx->client->dev; 867 868 ret = anx7625_hdcp_key_probe(ctx); 869 if (ret) { 870 dev_dbg(dev, "no key found, not to do hdcp\n"); 871 return ret; 872 } 873 874 /* Read downstream capability */ 875 ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_READ, 0x68028, 1, &bcap); 876 if (ret < 0) 877 return ret; 878 879 if (!(bcap & 0x01)) { 880 pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap); 881 return 0; 882 } 883 884 dev_dbg(dev, "enable HDCP 1.4\n"); 885 886 /* First clear HDCP state */ 887 ret = anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, 888 TX_HDCP_CTRL0, 889 KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN); 890 usleep_range(1000, 1100); 891 /* Second clear HDCP state */ 892 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, 893 TX_HDCP_CTRL0, 894 KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN); 895 896 /* Set time for waiting KSVR */ 897 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, 898 SP_TX_WAIT_KSVR_TIME, 0xc8); 899 /* Set time for waiting R0 */ 900 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client, 901 SP_TX_WAIT_R0_TIME, 0xb0); 902 ret |= anx7625_hdcp_key_load(ctx); 903 if (ret) { 904 pr_warn("prepare HDCP key failed.\n"); 905 return ret; 906 } 907 908 ret = anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xee, 0x20); 909 910 /* Try auth flag */ 911 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10); 912 /* Interrupt for DRM */ 913 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01); 914 if (ret < 0) 915 dev_err(dev, "fail to enable HDCP\n"); 916 917 return anx7625_write_or(ctx, ctx->i2c.tx_p0_client, 918 TX_HDCP_CTRL0, HARD_AUTH_EN); 919 } 920 921 static void anx7625_dp_start(struct anx7625_data *ctx) 922 { 923 int ret; 924 struct device *dev = &ctx->client->dev; 925 u8 data; 926 927 if (!ctx->display_timing_valid) { 928 DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n"); 929 return; 930 } 931 932 dev_dbg(dev, "set downstream sink into normal\n"); 933 /* Downstream sink enter into normal mode */ 934 data = 1; 935 ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data); 936 if (ret < 0) 937 dev_err(dev, "IO error : set sink into normal mode fail\n"); 938 939 /* Disable HDCP */ 940 anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f); 941 942 if (ctx->pdata.is_dpi) 943 ret = anx7625_dpi_config(ctx); 944 else 945 ret = anx7625_dsi_config(ctx); 946 947 if (ret < 0) 948 DRM_DEV_ERROR(dev, "MIPI phy setup error.\n"); 949 950 ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; 951 952 ctx->dp_en = 1; 953 } 954 955 static void anx7625_dp_stop(struct anx7625_data *ctx) 956 { 957 struct device *dev = &ctx->client->dev; 958 int ret; 959 u8 data; 960 961 DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n"); 962 963 /* 964 * Video disable: 0x72:08 bit 7 = 0; 965 * Audio disable: 0x70:87 bit 0 = 0; 966 */ 967 ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe); 968 ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f); 969 970 ret |= anx7625_video_mute_control(ctx, 1); 971 972 dev_dbg(dev, "notify downstream enter into standby\n"); 973 /* Downstream monitor enter into standby mode */ 974 data = 2; 975 ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data); 976 if (ret < 0) 977 DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); 978 979 ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; 980 981 ctx->dp_en = 0; 982 } 983 984 static int sp_tx_rst_aux(struct anx7625_data *ctx) 985 { 986 int ret; 987 988 ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2, 989 AUX_RST); 990 ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2, 991 ~AUX_RST); 992 return ret; 993 } 994 995 static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset) 996 { 997 int ret; 998 999 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1000 AP_AUX_BUFF_START, offset); 1001 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1002 AP_AUX_COMMAND, 0x04); 1003 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 1004 AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); 1005 return (ret | wait_aux_op_finish(ctx)); 1006 } 1007 1008 static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd) 1009 { 1010 int ret; 1011 1012 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1013 AP_AUX_COMMAND, len_cmd); 1014 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 1015 AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); 1016 return (ret | wait_aux_op_finish(ctx)); 1017 } 1018 1019 static int sp_tx_get_edid_block(struct anx7625_data *ctx) 1020 { 1021 int c = 0; 1022 struct device *dev = &ctx->client->dev; 1023 1024 sp_tx_aux_wr(ctx, 0x7e); 1025 sp_tx_aux_rd(ctx, 0x01); 1026 c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START); 1027 if (c < 0) { 1028 DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n"); 1029 return -EIO; 1030 } 1031 1032 DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1); 1033 1034 if (c > MAX_EDID_BLOCK) 1035 c = 1; 1036 1037 return c; 1038 } 1039 1040 static int edid_read(struct anx7625_data *ctx, 1041 u8 offset, u8 *pblock_buf) 1042 { 1043 int ret, cnt; 1044 struct device *dev = &ctx->client->dev; 1045 1046 for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) { 1047 sp_tx_aux_wr(ctx, offset); 1048 /* Set I2C read com 0x01 mot = 0 and read 16 bytes */ 1049 ret = sp_tx_aux_rd(ctx, 0xf1); 1050 1051 if (ret) { 1052 ret = sp_tx_rst_aux(ctx); 1053 DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n"); 1054 } else { 1055 ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, 1056 AP_AUX_BUFF_START, 1057 MAX_DPCD_BUFFER_SIZE, 1058 pblock_buf); 1059 if (ret > 0) 1060 break; 1061 } 1062 } 1063 1064 if (cnt > EDID_TRY_CNT) 1065 return -EIO; 1066 1067 return ret; 1068 } 1069 1070 static int segments_edid_read(struct anx7625_data *ctx, 1071 u8 segment, u8 *buf, u8 offset) 1072 { 1073 u8 cnt; 1074 int ret; 1075 struct device *dev = &ctx->client->dev; 1076 1077 /* Write address only */ 1078 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1079 AP_AUX_ADDR_7_0, 0x30); 1080 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1081 AP_AUX_COMMAND, 0x04); 1082 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1083 AP_AUX_CTRL_STATUS, 1084 AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN); 1085 1086 ret |= wait_aux_op_finish(ctx); 1087 /* Write segment address */ 1088 ret |= sp_tx_aux_wr(ctx, segment); 1089 /* Data read */ 1090 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1091 AP_AUX_ADDR_7_0, 0x50); 1092 if (ret) { 1093 DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n"); 1094 return ret; 1095 } 1096 1097 for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) { 1098 sp_tx_aux_wr(ctx, offset); 1099 /* Set I2C read com 0x01 mot = 0 and read 16 bytes */ 1100 ret = sp_tx_aux_rd(ctx, 0xf1); 1101 1102 if (ret) { 1103 ret = sp_tx_rst_aux(ctx); 1104 DRM_DEV_ERROR(dev, "segment read fail, reset!\n"); 1105 } else { 1106 ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, 1107 AP_AUX_BUFF_START, 1108 MAX_DPCD_BUFFER_SIZE, buf); 1109 if (ret > 0) 1110 break; 1111 } 1112 } 1113 1114 if (cnt > EDID_TRY_CNT) 1115 return -EIO; 1116 1117 return ret; 1118 } 1119 1120 static int sp_tx_edid_read(struct anx7625_data *ctx, 1121 u8 *pedid_blocks_buf) 1122 { 1123 u8 offset; 1124 int edid_pos; 1125 int count, blocks_num; 1126 u8 pblock_buf[MAX_DPCD_BUFFER_SIZE]; 1127 u8 i, j; 1128 int g_edid_break = 0; 1129 int ret; 1130 struct device *dev = &ctx->client->dev; 1131 1132 /* Address initial */ 1133 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1134 AP_AUX_ADDR_7_0, 0x50); 1135 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1136 AP_AUX_ADDR_15_8, 0); 1137 ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, 1138 AP_AUX_ADDR_19_16, 0xf0); 1139 if (ret < 0) { 1140 DRM_DEV_ERROR(dev, "access aux channel IO error.\n"); 1141 return -EIO; 1142 } 1143 1144 blocks_num = sp_tx_get_edid_block(ctx); 1145 if (blocks_num < 0) 1146 return blocks_num; 1147 1148 count = 0; 1149 1150 do { 1151 switch (count) { 1152 case 0: 1153 case 1: 1154 for (i = 0; i < 8; i++) { 1155 offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE; 1156 g_edid_break = edid_read(ctx, offset, 1157 pblock_buf); 1158 1159 if (g_edid_break < 0) 1160 break; 1161 1162 memcpy(&pedid_blocks_buf[offset], 1163 pblock_buf, 1164 MAX_DPCD_BUFFER_SIZE); 1165 } 1166 1167 break; 1168 case 2: 1169 offset = 0x00; 1170 1171 for (j = 0; j < 8; j++) { 1172 edid_pos = (j + count * 8) * 1173 MAX_DPCD_BUFFER_SIZE; 1174 1175 if (g_edid_break == 1) 1176 break; 1177 1178 ret = segments_edid_read(ctx, count / 2, 1179 pblock_buf, offset); 1180 if (ret < 0) 1181 return ret; 1182 1183 memcpy(&pedid_blocks_buf[edid_pos], 1184 pblock_buf, 1185 MAX_DPCD_BUFFER_SIZE); 1186 offset = offset + 0x10; 1187 } 1188 1189 break; 1190 case 3: 1191 offset = 0x80; 1192 1193 for (j = 0; j < 8; j++) { 1194 edid_pos = (j + count * 8) * 1195 MAX_DPCD_BUFFER_SIZE; 1196 if (g_edid_break == 1) 1197 break; 1198 1199 ret = segments_edid_read(ctx, count / 2, 1200 pblock_buf, offset); 1201 if (ret < 0) 1202 return ret; 1203 1204 memcpy(&pedid_blocks_buf[edid_pos], 1205 pblock_buf, 1206 MAX_DPCD_BUFFER_SIZE); 1207 offset = offset + 0x10; 1208 } 1209 1210 break; 1211 default: 1212 break; 1213 } 1214 1215 count++; 1216 1217 } while (blocks_num >= count); 1218 1219 /* Check edid data */ 1220 if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) { 1221 DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n"); 1222 return -EINVAL; 1223 } 1224 1225 /* Reset aux channel */ 1226 ret = sp_tx_rst_aux(ctx); 1227 if (ret < 0) { 1228 DRM_DEV_ERROR(dev, "Failed to reset aux channel!\n"); 1229 return ret; 1230 } 1231 1232 return (blocks_num + 1); 1233 } 1234 1235 static void anx7625_power_on(struct anx7625_data *ctx) 1236 { 1237 struct device *dev = &ctx->client->dev; 1238 int ret, i; 1239 1240 if (!ctx->pdata.low_power_mode) { 1241 DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); 1242 return; 1243 } 1244 1245 for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) { 1246 ret = regulator_enable(ctx->pdata.supplies[i].consumer); 1247 if (ret < 0) { 1248 DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n", 1249 i, ret); 1250 goto reg_err; 1251 } 1252 usleep_range(2000, 2100); 1253 } 1254 1255 usleep_range(11000, 12000); 1256 1257 /* Power on pin enable */ 1258 gpiod_set_value(ctx->pdata.gpio_p_on, 1); 1259 usleep_range(10000, 11000); 1260 /* Power reset pin enable */ 1261 gpiod_set_value(ctx->pdata.gpio_reset, 1); 1262 usleep_range(10000, 11000); 1263 1264 DRM_DEV_DEBUG_DRIVER(dev, "power on !\n"); 1265 return; 1266 reg_err: 1267 for (--i; i >= 0; i--) 1268 regulator_disable(ctx->pdata.supplies[i].consumer); 1269 } 1270 1271 static void anx7625_power_standby(struct anx7625_data *ctx) 1272 { 1273 struct device *dev = &ctx->client->dev; 1274 int ret; 1275 1276 if (!ctx->pdata.low_power_mode) { 1277 DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); 1278 return; 1279 } 1280 1281 gpiod_set_value(ctx->pdata.gpio_reset, 0); 1282 usleep_range(1000, 1100); 1283 gpiod_set_value(ctx->pdata.gpio_p_on, 0); 1284 usleep_range(1000, 1100); 1285 1286 ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies), 1287 ctx->pdata.supplies); 1288 if (ret < 0) 1289 DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret); 1290 1291 DRM_DEV_DEBUG_DRIVER(dev, "power down\n"); 1292 } 1293 1294 /* Basic configurations of ANX7625 */ 1295 static void anx7625_config(struct anx7625_data *ctx) 1296 { 1297 anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1298 XTAL_FRQ_SEL, XTAL_FRQ_27M); 1299 } 1300 1301 static void anx7625_disable_pd_protocol(struct anx7625_data *ctx) 1302 { 1303 struct device *dev = &ctx->client->dev; 1304 int ret; 1305 1306 /* Reset main ocm */ 1307 ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40); 1308 /* Disable PD */ 1309 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1310 AP_AV_STATUS, AP_DISABLE_PD); 1311 /* Release main ocm */ 1312 ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00); 1313 1314 if (ret < 0) 1315 DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n"); 1316 else 1317 DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n"); 1318 } 1319 1320 static int anx7625_ocm_loading_check(struct anx7625_data *ctx) 1321 { 1322 int ret; 1323 struct device *dev = &ctx->client->dev; 1324 1325 /* Check interface workable */ 1326 ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, 1327 FLASH_LOAD_STA); 1328 if (ret < 0) { 1329 DRM_DEV_ERROR(dev, "IO error : access flash load.\n"); 1330 return ret; 1331 } 1332 if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK) 1333 return -ENODEV; 1334 1335 anx7625_disable_pd_protocol(ctx); 1336 1337 DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,", 1338 anx7625_reg_read(ctx, 1339 ctx->i2c.rx_p0_client, 1340 OCM_FW_VERSION), 1341 anx7625_reg_read(ctx, 1342 ctx->i2c.rx_p0_client, 1343 OCM_FW_REVERSION)); 1344 DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n", 1345 ANX7625_DRV_VERSION); 1346 1347 return 0; 1348 } 1349 1350 static void anx7625_power_on_init(struct anx7625_data *ctx) 1351 { 1352 int retry_count, i; 1353 1354 for (retry_count = 0; retry_count < 3; retry_count++) { 1355 anx7625_power_on(ctx); 1356 anx7625_config(ctx); 1357 1358 for (i = 0; i < OCM_LOADING_TIME; i++) { 1359 if (!anx7625_ocm_loading_check(ctx)) 1360 return; 1361 usleep_range(1000, 1100); 1362 } 1363 anx7625_power_standby(ctx); 1364 } 1365 } 1366 1367 static void anx7625_init_gpio(struct anx7625_data *platform) 1368 { 1369 struct device *dev = &platform->client->dev; 1370 1371 DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n"); 1372 1373 /* Gpio for chip power enable */ 1374 platform->pdata.gpio_p_on = 1375 devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 1376 if (IS_ERR_OR_NULL(platform->pdata.gpio_p_on)) { 1377 DRM_DEV_DEBUG_DRIVER(dev, "no enable gpio found\n"); 1378 platform->pdata.gpio_p_on = NULL; 1379 } 1380 1381 /* Gpio for chip reset */ 1382 platform->pdata.gpio_reset = 1383 devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 1384 if (IS_ERR_OR_NULL(platform->pdata.gpio_reset)) { 1385 DRM_DEV_DEBUG_DRIVER(dev, "no reset gpio found\n"); 1386 platform->pdata.gpio_reset = NULL; 1387 } 1388 1389 if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) { 1390 platform->pdata.low_power_mode = 1; 1391 DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n", 1392 desc_to_gpio(platform->pdata.gpio_p_on), 1393 desc_to_gpio(platform->pdata.gpio_reset)); 1394 } else { 1395 platform->pdata.low_power_mode = 0; 1396 DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n"); 1397 } 1398 } 1399 1400 static void anx7625_stop_dp_work(struct anx7625_data *ctx) 1401 { 1402 ctx->hpd_status = 0; 1403 ctx->hpd_high_cnt = 0; 1404 } 1405 1406 static void anx7625_start_dp_work(struct anx7625_data *ctx) 1407 { 1408 int ret; 1409 struct device *dev = &ctx->client->dev; 1410 1411 if (ctx->hpd_high_cnt >= 2) { 1412 DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n"); 1413 return; 1414 } 1415 1416 ctx->hpd_status = 1; 1417 ctx->hpd_high_cnt++; 1418 1419 /* Not support HDCP */ 1420 ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f); 1421 1422 /* Try auth flag */ 1423 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10); 1424 /* Interrupt for DRM */ 1425 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01); 1426 if (ret < 0) { 1427 DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n"); 1428 return; 1429 } 1430 1431 ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86); 1432 if (ret < 0) 1433 return; 1434 1435 DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret); 1436 } 1437 1438 static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx) 1439 { 1440 int ret; 1441 1442 /* Set irq detect window to 2ms */ 1443 ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, 1444 HPD_DET_TIMER_BIT0_7, HPD_TIME & 0xFF); 1445 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, 1446 HPD_DET_TIMER_BIT8_15, 1447 (HPD_TIME >> 8) & 0xFF); 1448 ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, 1449 HPD_DET_TIMER_BIT16_23, 1450 (HPD_TIME >> 16) & 0xFF); 1451 if (ret < 0) 1452 return ret; 1453 1454 return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS); 1455 } 1456 1457 static int _anx7625_hpd_polling(struct anx7625_data *ctx, 1458 unsigned long wait_us) 1459 { 1460 int ret, val; 1461 struct device *dev = &ctx->client->dev; 1462 1463 /* Interrupt mode, no need poll HPD status, just return */ 1464 if (ctx->pdata.intp_irq) 1465 return 0; 1466 1467 ret = readx_poll_timeout(anx7625_read_hpd_status_p0, 1468 ctx, val, 1469 ((val & HPD_STATUS) || (val < 0)), 1470 wait_us / 100, 1471 wait_us); 1472 if (ret) { 1473 DRM_DEV_ERROR(dev, "no hpd.\n"); 1474 return ret; 1475 } 1476 1477 DRM_DEV_DEBUG_DRIVER(dev, "system status: 0x%x. HPD raise up.\n", val); 1478 anx7625_reg_write(ctx, ctx->i2c.tcpc_client, 1479 INTR_ALERT_1, 0xFF); 1480 anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1481 INTERFACE_CHANGE_INT, 0); 1482 1483 anx7625_start_dp_work(ctx); 1484 1485 if (!ctx->pdata.panel_bridge && ctx->bridge_attached) 1486 drm_helper_hpd_irq_event(ctx->bridge.dev); 1487 1488 return 0; 1489 } 1490 1491 static int anx7625_wait_hpd_asserted(struct drm_dp_aux *aux, 1492 unsigned long wait_us) 1493 { 1494 struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux); 1495 struct device *dev = &ctx->client->dev; 1496 int ret; 1497 1498 pm_runtime_get_sync(dev); 1499 ret = _anx7625_hpd_polling(ctx, wait_us); 1500 pm_runtime_mark_last_busy(dev); 1501 pm_runtime_put_autosuspend(dev); 1502 1503 return ret; 1504 } 1505 1506 static void anx7625_remove_edid(struct anx7625_data *ctx) 1507 { 1508 ctx->slimport_edid_p.edid_block_num = -1; 1509 } 1510 1511 static void anx7625_dp_adjust_swing(struct anx7625_data *ctx) 1512 { 1513 int i; 1514 1515 for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++) 1516 anx7625_reg_write(ctx, ctx->i2c.tx_p1_client, 1517 DP_TX_LANE0_SWING_REG0 + i, 1518 ctx->pdata.lane0_reg_data[i]); 1519 1520 for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++) 1521 anx7625_reg_write(ctx, ctx->i2c.tx_p1_client, 1522 DP_TX_LANE1_SWING_REG0 + i, 1523 ctx->pdata.lane1_reg_data[i]); 1524 } 1525 1526 static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on) 1527 { 1528 struct device *dev = &ctx->client->dev; 1529 1530 /* HPD changed */ 1531 DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n", 1532 (u32)on); 1533 1534 if (on == 0) { 1535 DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n"); 1536 anx7625_remove_edid(ctx); 1537 anx7625_stop_dp_work(ctx); 1538 } else { 1539 DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n"); 1540 anx7625_start_dp_work(ctx); 1541 anx7625_dp_adjust_swing(ctx); 1542 } 1543 } 1544 1545 static int anx7625_hpd_change_detect(struct anx7625_data *ctx) 1546 { 1547 int intr_vector, status; 1548 struct device *dev = &ctx->client->dev; 1549 1550 status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client, 1551 INTR_ALERT_1, 0xFF); 1552 if (status < 0) { 1553 DRM_DEV_ERROR(dev, "cannot clear alert reg.\n"); 1554 return status; 1555 } 1556 1557 intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, 1558 INTERFACE_CHANGE_INT); 1559 if (intr_vector < 0) { 1560 DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n"); 1561 return intr_vector; 1562 } 1563 DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector); 1564 status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 1565 INTERFACE_CHANGE_INT, 1566 intr_vector & (~intr_vector)); 1567 if (status < 0) { 1568 DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n"); 1569 return status; 1570 } 1571 1572 if (!(intr_vector & HPD_STATUS_CHANGE)) 1573 return -ENOENT; 1574 1575 status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, 1576 SYSTEM_STSTUS); 1577 if (status < 0) { 1578 DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n"); 1579 return status; 1580 } 1581 1582 DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status); 1583 dp_hpd_change_handler(ctx, status & HPD_STATUS); 1584 1585 return 0; 1586 } 1587 1588 static void anx7625_work_func(struct work_struct *work) 1589 { 1590 int event; 1591 struct anx7625_data *ctx = container_of(work, 1592 struct anx7625_data, work); 1593 1594 mutex_lock(&ctx->lock); 1595 1596 if (pm_runtime_suspended(&ctx->client->dev)) 1597 goto unlock; 1598 1599 event = anx7625_hpd_change_detect(ctx); 1600 if (event < 0) 1601 goto unlock; 1602 1603 if (ctx->bridge_attached) 1604 drm_helper_hpd_irq_event(ctx->bridge.dev); 1605 1606 unlock: 1607 mutex_unlock(&ctx->lock); 1608 } 1609 1610 static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data) 1611 { 1612 struct anx7625_data *ctx = (struct anx7625_data *)data; 1613 1614 queue_work(ctx->workqueue, &ctx->work); 1615 1616 return IRQ_HANDLED; 1617 } 1618 1619 static int anx7625_get_swing_setting(struct device *dev, 1620 struct anx7625_platform_data *pdata) 1621 { 1622 int num_regs; 1623 1624 if (of_get_property(dev->of_node, 1625 "analogix,lane0-swing", &num_regs)) { 1626 if (num_regs > DP_TX_SWING_REG_CNT) 1627 num_regs = DP_TX_SWING_REG_CNT; 1628 1629 pdata->dp_lane0_swing_reg_cnt = num_regs; 1630 of_property_read_u8_array(dev->of_node, "analogix,lane0-swing", 1631 pdata->lane0_reg_data, num_regs); 1632 } 1633 1634 if (of_get_property(dev->of_node, 1635 "analogix,lane1-swing", &num_regs)) { 1636 if (num_regs > DP_TX_SWING_REG_CNT) 1637 num_regs = DP_TX_SWING_REG_CNT; 1638 1639 pdata->dp_lane1_swing_reg_cnt = num_regs; 1640 of_property_read_u8_array(dev->of_node, "analogix,lane1-swing", 1641 pdata->lane1_reg_data, num_regs); 1642 } 1643 1644 return 0; 1645 } 1646 1647 static int anx7625_parse_dt(struct device *dev, 1648 struct anx7625_platform_data *pdata) 1649 { 1650 struct device_node *np = dev->of_node, *ep0; 1651 int bus_type, mipi_lanes; 1652 1653 anx7625_get_swing_setting(dev, pdata); 1654 1655 pdata->is_dpi = 0; /* default dsi mode */ 1656 of_node_put(pdata->mipi_host_node); 1657 pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0); 1658 if (!pdata->mipi_host_node) { 1659 DRM_DEV_ERROR(dev, "fail to get internal panel.\n"); 1660 return -ENODEV; 1661 } 1662 1663 bus_type = 0; 1664 mipi_lanes = MAX_LANES_SUPPORT; 1665 ep0 = of_graph_get_endpoint_by_regs(np, 0, 0); 1666 if (ep0) { 1667 if (of_property_read_u32(ep0, "bus-type", &bus_type)) 1668 bus_type = 0; 1669 1670 mipi_lanes = drm_of_get_data_lanes_count(ep0, 1, MAX_LANES_SUPPORT); 1671 of_node_put(ep0); 1672 } 1673 1674 if (bus_type == V4L2_FWNODE_BUS_TYPE_DPI) /* bus type is DPI */ 1675 pdata->is_dpi = 1; 1676 1677 pdata->mipi_lanes = MAX_LANES_SUPPORT; 1678 if (mipi_lanes > 0) 1679 pdata->mipi_lanes = mipi_lanes; 1680 1681 if (pdata->is_dpi) 1682 DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n"); 1683 else 1684 DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n"); 1685 1686 if (of_property_read_bool(np, "analogix,audio-enable")) 1687 pdata->audio_en = 1; 1688 1689 return 0; 1690 } 1691 1692 static int anx7625_parse_dt_panel(struct device *dev, 1693 struct anx7625_platform_data *pdata) 1694 { 1695 struct device_node *np = dev->of_node; 1696 1697 pdata->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0); 1698 if (IS_ERR(pdata->panel_bridge)) { 1699 if (PTR_ERR(pdata->panel_bridge) == -ENODEV) { 1700 pdata->panel_bridge = NULL; 1701 return 0; 1702 } 1703 1704 return PTR_ERR(pdata->panel_bridge); 1705 } 1706 1707 DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n"); 1708 1709 return 0; 1710 } 1711 1712 static bool anx7625_of_panel_on_aux_bus(struct device *dev) 1713 { 1714 struct device_node *bus, *panel; 1715 1716 bus = of_get_child_by_name(dev->of_node, "aux-bus"); 1717 if (!bus) 1718 return false; 1719 1720 panel = of_get_child_by_name(bus, "panel"); 1721 of_node_put(bus); 1722 if (!panel) 1723 return false; 1724 of_node_put(panel); 1725 1726 return true; 1727 } 1728 1729 static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge) 1730 { 1731 return container_of(bridge, struct anx7625_data, bridge); 1732 } 1733 1734 static ssize_t anx7625_aux_transfer(struct drm_dp_aux *aux, 1735 struct drm_dp_aux_msg *msg) 1736 { 1737 struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux); 1738 struct device *dev = &ctx->client->dev; 1739 u8 request = msg->request & ~DP_AUX_I2C_MOT; 1740 int ret = 0; 1741 1742 pm_runtime_get_sync(dev); 1743 msg->reply = 0; 1744 switch (request) { 1745 case DP_AUX_NATIVE_WRITE: 1746 case DP_AUX_I2C_WRITE: 1747 case DP_AUX_NATIVE_READ: 1748 case DP_AUX_I2C_READ: 1749 break; 1750 default: 1751 ret = -EINVAL; 1752 } 1753 if (!ret) 1754 ret = anx7625_aux_trans(ctx, msg->request, msg->address, 1755 msg->size, msg->buffer); 1756 pm_runtime_mark_last_busy(dev); 1757 pm_runtime_put_autosuspend(dev); 1758 1759 return ret; 1760 } 1761 1762 static struct edid *anx7625_get_edid(struct anx7625_data *ctx) 1763 { 1764 struct device *dev = &ctx->client->dev; 1765 struct s_edid_data *p_edid = &ctx->slimport_edid_p; 1766 int edid_num; 1767 u8 *edid; 1768 1769 edid = kmalloc(FOUR_BLOCK_SIZE, GFP_KERNEL); 1770 if (!edid) { 1771 DRM_DEV_ERROR(dev, "Fail to allocate buffer\n"); 1772 return NULL; 1773 } 1774 1775 if (ctx->slimport_edid_p.edid_block_num > 0) { 1776 memcpy(edid, ctx->slimport_edid_p.edid_raw_data, 1777 FOUR_BLOCK_SIZE); 1778 return (struct edid *)edid; 1779 } 1780 1781 pm_runtime_get_sync(dev); 1782 _anx7625_hpd_polling(ctx, 5000 * 100); 1783 edid_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data); 1784 pm_runtime_put_sync(dev); 1785 1786 if (edid_num < 1) { 1787 DRM_DEV_ERROR(dev, "Fail to read EDID: %d\n", edid_num); 1788 kfree(edid); 1789 return NULL; 1790 } 1791 1792 p_edid->edid_block_num = edid_num; 1793 1794 memcpy(edid, ctx->slimport_edid_p.edid_raw_data, FOUR_BLOCK_SIZE); 1795 return (struct edid *)edid; 1796 } 1797 1798 static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx) 1799 { 1800 struct device *dev = &ctx->client->dev; 1801 1802 DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n"); 1803 1804 if (ctx->pdata.panel_bridge) 1805 return connector_status_connected; 1806 1807 return ctx->hpd_status ? connector_status_connected : 1808 connector_status_disconnected; 1809 } 1810 1811 static int anx7625_audio_hw_params(struct device *dev, void *data, 1812 struct hdmi_codec_daifmt *fmt, 1813 struct hdmi_codec_params *params) 1814 { 1815 struct anx7625_data *ctx = dev_get_drvdata(dev); 1816 int wl, ch, rate; 1817 int ret = 0; 1818 1819 if (anx7625_sink_detect(ctx) == connector_status_disconnected) { 1820 DRM_DEV_DEBUG_DRIVER(dev, "DP not connected\n"); 1821 return 0; 1822 } 1823 1824 if (fmt->fmt != HDMI_DSP_A && fmt->fmt != HDMI_I2S) { 1825 DRM_DEV_ERROR(dev, "only supports DSP_A & I2S\n"); 1826 return -EINVAL; 1827 } 1828 1829 DRM_DEV_DEBUG_DRIVER(dev, "setting %d Hz, %d bit, %d channels\n", 1830 params->sample_rate, params->sample_width, 1831 params->cea.channels); 1832 1833 if (fmt->fmt == HDMI_DSP_A) 1834 ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, 1835 AUDIO_CHANNEL_STATUS_6, 1836 ~I2S_SLAVE_MODE, 1837 TDM_SLAVE_MODE); 1838 else 1839 ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, 1840 AUDIO_CHANNEL_STATUS_6, 1841 ~TDM_SLAVE_MODE, 1842 I2S_SLAVE_MODE); 1843 1844 /* Word length */ 1845 switch (params->sample_width) { 1846 case 16: 1847 wl = AUDIO_W_LEN_16_20MAX; 1848 break; 1849 case 18: 1850 wl = AUDIO_W_LEN_18_20MAX; 1851 break; 1852 case 20: 1853 wl = AUDIO_W_LEN_20_20MAX; 1854 break; 1855 case 24: 1856 wl = AUDIO_W_LEN_24_24MAX; 1857 break; 1858 default: 1859 DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support", 1860 params->sample_width); 1861 return -EINVAL; 1862 } 1863 ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, 1864 AUDIO_CHANNEL_STATUS_5, 1865 0xf0, wl); 1866 1867 /* Channel num */ 1868 switch (params->cea.channels) { 1869 case 2: 1870 ch = I2S_CH_2; 1871 break; 1872 case 4: 1873 ch = TDM_CH_4; 1874 break; 1875 case 6: 1876 ch = TDM_CH_6; 1877 break; 1878 case 8: 1879 ch = TDM_CH_8; 1880 break; 1881 default: 1882 DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support", 1883 params->cea.channels); 1884 return -EINVAL; 1885 } 1886 ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, 1887 AUDIO_CHANNEL_STATUS_6, 0x1f, ch << 5); 1888 if (ch > I2S_CH_2) 1889 ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client, 1890 AUDIO_CHANNEL_STATUS_6, AUDIO_LAYOUT); 1891 else 1892 ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 1893 AUDIO_CHANNEL_STATUS_6, ~AUDIO_LAYOUT); 1894 1895 /* FS */ 1896 switch (params->sample_rate) { 1897 case 32000: 1898 rate = AUDIO_FS_32K; 1899 break; 1900 case 44100: 1901 rate = AUDIO_FS_441K; 1902 break; 1903 case 48000: 1904 rate = AUDIO_FS_48K; 1905 break; 1906 case 88200: 1907 rate = AUDIO_FS_882K; 1908 break; 1909 case 96000: 1910 rate = AUDIO_FS_96K; 1911 break; 1912 case 176400: 1913 rate = AUDIO_FS_1764K; 1914 break; 1915 case 192000: 1916 rate = AUDIO_FS_192K; 1917 break; 1918 default: 1919 DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d not support", 1920 params->sample_rate); 1921 return -EINVAL; 1922 } 1923 ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client, 1924 AUDIO_CHANNEL_STATUS_4, 1925 0xf0, rate); 1926 ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, 1927 AP_AV_STATUS, AP_AUDIO_CHG); 1928 if (ret < 0) { 1929 DRM_DEV_ERROR(dev, "IO error : config audio.\n"); 1930 return -EIO; 1931 } 1932 1933 return 0; 1934 } 1935 1936 static void anx7625_audio_shutdown(struct device *dev, void *data) 1937 { 1938 DRM_DEV_DEBUG_DRIVER(dev, "stop audio\n"); 1939 } 1940 1941 static int anx7625_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 1942 struct device_node *endpoint) 1943 { 1944 struct of_endpoint of_ep; 1945 int ret; 1946 1947 ret = of_graph_parse_endpoint(endpoint, &of_ep); 1948 if (ret < 0) 1949 return ret; 1950 1951 /* 1952 * HDMI sound should be located at external DPI port 1953 * Didn't have good way to check where is internal(DSI) 1954 * or external(DPI) bridge 1955 */ 1956 return 0; 1957 } 1958 1959 static void 1960 anx7625_audio_update_connector_status(struct anx7625_data *ctx, 1961 enum drm_connector_status status) 1962 { 1963 if (ctx->plugged_cb && ctx->codec_dev) { 1964 ctx->plugged_cb(ctx->codec_dev, 1965 status == connector_status_connected); 1966 } 1967 } 1968 1969 static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data, 1970 hdmi_codec_plugged_cb fn, 1971 struct device *codec_dev) 1972 { 1973 struct anx7625_data *ctx = data; 1974 1975 ctx->plugged_cb = fn; 1976 ctx->codec_dev = codec_dev; 1977 anx7625_audio_update_connector_status(ctx, anx7625_sink_detect(ctx)); 1978 1979 return 0; 1980 } 1981 1982 static int anx7625_audio_get_eld(struct device *dev, void *data, 1983 u8 *buf, size_t len) 1984 { 1985 struct anx7625_data *ctx = dev_get_drvdata(dev); 1986 1987 if (!ctx->connector) { 1988 /* Pass en empty ELD if connector not available */ 1989 memset(buf, 0, len); 1990 } else { 1991 dev_dbg(dev, "audio copy eld\n"); 1992 memcpy(buf, ctx->connector->eld, 1993 min(sizeof(ctx->connector->eld), len)); 1994 } 1995 1996 return 0; 1997 } 1998 1999 static const struct hdmi_codec_ops anx7625_codec_ops = { 2000 .hw_params = anx7625_audio_hw_params, 2001 .audio_shutdown = anx7625_audio_shutdown, 2002 .get_eld = anx7625_audio_get_eld, 2003 .get_dai_id = anx7625_hdmi_i2s_get_dai_id, 2004 .hook_plugged_cb = anx7625_audio_hook_plugged_cb, 2005 }; 2006 2007 static void anx7625_unregister_audio(struct anx7625_data *ctx) 2008 { 2009 struct device *dev = &ctx->client->dev; 2010 2011 if (ctx->audio_pdev) { 2012 platform_device_unregister(ctx->audio_pdev); 2013 ctx->audio_pdev = NULL; 2014 } 2015 2016 DRM_DEV_DEBUG_DRIVER(dev, "unbound to %s", HDMI_CODEC_DRV_NAME); 2017 } 2018 2019 static int anx7625_register_audio(struct device *dev, struct anx7625_data *ctx) 2020 { 2021 struct hdmi_codec_pdata codec_data = { 2022 .ops = &anx7625_codec_ops, 2023 .max_i2s_channels = 8, 2024 .i2s = 1, 2025 .data = ctx, 2026 }; 2027 2028 ctx->audio_pdev = platform_device_register_data(dev, 2029 HDMI_CODEC_DRV_NAME, 2030 PLATFORM_DEVID_AUTO, 2031 &codec_data, 2032 sizeof(codec_data)); 2033 2034 if (IS_ERR(ctx->audio_pdev)) 2035 return PTR_ERR(ctx->audio_pdev); 2036 2037 DRM_DEV_DEBUG_DRIVER(dev, "bound to %s", HDMI_CODEC_DRV_NAME); 2038 2039 return 0; 2040 } 2041 2042 static int anx7625_setup_dsi_device(struct anx7625_data *ctx) 2043 { 2044 struct mipi_dsi_device *dsi; 2045 struct device *dev = &ctx->client->dev; 2046 struct mipi_dsi_host *host; 2047 const struct mipi_dsi_device_info info = { 2048 .type = "anx7625", 2049 .channel = 0, 2050 .node = NULL, 2051 }; 2052 2053 host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node); 2054 if (!host) { 2055 DRM_DEV_ERROR(dev, "fail to find dsi host.\n"); 2056 return -EPROBE_DEFER; 2057 } 2058 2059 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 2060 if (IS_ERR(dsi)) { 2061 DRM_DEV_ERROR(dev, "fail to create dsi device.\n"); 2062 return -EINVAL; 2063 } 2064 2065 dsi->lanes = ctx->pdata.mipi_lanes; 2066 dsi->format = MIPI_DSI_FMT_RGB888; 2067 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | 2068 MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 2069 MIPI_DSI_MODE_VIDEO_HSE | 2070 MIPI_DSI_HS_PKT_END_ALIGNED; 2071 2072 ctx->dsi = dsi; 2073 2074 return 0; 2075 } 2076 2077 static int anx7625_attach_dsi(struct anx7625_data *ctx) 2078 { 2079 struct device *dev = &ctx->client->dev; 2080 int ret; 2081 2082 DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n"); 2083 2084 ret = devm_mipi_dsi_attach(dev, ctx->dsi); 2085 if (ret) { 2086 DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n"); 2087 return ret; 2088 } 2089 2090 DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n"); 2091 2092 return 0; 2093 } 2094 2095 static void hdcp_check_work_func(struct work_struct *work) 2096 { 2097 u8 status; 2098 struct delayed_work *dwork; 2099 struct anx7625_data *ctx; 2100 struct device *dev; 2101 struct drm_device *drm_dev; 2102 2103 dwork = to_delayed_work(work); 2104 ctx = container_of(dwork, struct anx7625_data, hdcp_work); 2105 dev = &ctx->client->dev; 2106 2107 if (!ctx->connector) { 2108 dev_err(dev, "HDCP connector is null!"); 2109 return; 2110 } 2111 2112 drm_dev = ctx->connector->dev; 2113 drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL); 2114 mutex_lock(&ctx->hdcp_wq_lock); 2115 2116 status = anx7625_reg_read(ctx, ctx->i2c.tx_p0_client, 0); 2117 dev_dbg(dev, "sink HDCP status check: %.02x\n", status); 2118 if (status & BIT(1)) { 2119 ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_ENABLED; 2120 drm_hdcp_update_content_protection(ctx->connector, 2121 ctx->hdcp_cp); 2122 dev_dbg(dev, "update CP to ENABLE\n"); 2123 } 2124 2125 mutex_unlock(&ctx->hdcp_wq_lock); 2126 drm_modeset_unlock(&drm_dev->mode_config.connection_mutex); 2127 } 2128 2129 static int anx7625_connector_atomic_check(struct anx7625_data *ctx, 2130 struct drm_connector_state *state) 2131 { 2132 struct device *dev = &ctx->client->dev; 2133 int cp; 2134 2135 dev_dbg(dev, "hdcp state check\n"); 2136 cp = state->content_protection; 2137 2138 if (cp == ctx->hdcp_cp) 2139 return 0; 2140 2141 if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) { 2142 if (ctx->dp_en) { 2143 dev_dbg(dev, "enable HDCP\n"); 2144 anx7625_hdcp_enable(ctx); 2145 2146 queue_delayed_work(ctx->hdcp_workqueue, 2147 &ctx->hdcp_work, 2148 msecs_to_jiffies(2000)); 2149 } 2150 } 2151 2152 if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { 2153 if (ctx->hdcp_cp != DRM_MODE_CONTENT_PROTECTION_ENABLED) { 2154 dev_err(dev, "current CP is not ENABLED\n"); 2155 return -EINVAL; 2156 } 2157 anx7625_hdcp_disable(ctx); 2158 ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED; 2159 drm_hdcp_update_content_protection(ctx->connector, 2160 ctx->hdcp_cp); 2161 dev_dbg(dev, "update CP to UNDESIRE\n"); 2162 } 2163 2164 if (cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) { 2165 dev_err(dev, "Userspace illegal set to PROTECTION ENABLE\n"); 2166 return -EINVAL; 2167 } 2168 2169 return 0; 2170 } 2171 2172 static int anx7625_bridge_attach(struct drm_bridge *bridge, 2173 enum drm_bridge_attach_flags flags) 2174 { 2175 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2176 int err; 2177 struct device *dev = &ctx->client->dev; 2178 2179 DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n"); 2180 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) 2181 return -EINVAL; 2182 2183 if (!bridge->encoder) { 2184 DRM_DEV_ERROR(dev, "Parent encoder object not found"); 2185 return -ENODEV; 2186 } 2187 2188 ctx->aux.drm_dev = bridge->dev; 2189 err = drm_dp_aux_register(&ctx->aux); 2190 if (err) { 2191 dev_err(dev, "failed to register aux channel: %d\n", err); 2192 return err; 2193 } 2194 2195 if (ctx->pdata.panel_bridge) { 2196 err = drm_bridge_attach(bridge->encoder, 2197 ctx->pdata.panel_bridge, 2198 &ctx->bridge, flags); 2199 if (err) 2200 return err; 2201 } 2202 2203 ctx->bridge_attached = 1; 2204 2205 return 0; 2206 } 2207 2208 static void anx7625_bridge_detach(struct drm_bridge *bridge) 2209 { 2210 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2211 2212 drm_dp_aux_unregister(&ctx->aux); 2213 } 2214 2215 static enum drm_mode_status 2216 anx7625_bridge_mode_valid(struct drm_bridge *bridge, 2217 const struct drm_display_info *info, 2218 const struct drm_display_mode *mode) 2219 { 2220 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2221 struct device *dev = &ctx->client->dev; 2222 2223 DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n"); 2224 2225 /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */ 2226 if (mode->clock > SUPPORT_PIXEL_CLOCK) { 2227 DRM_DEV_DEBUG_DRIVER(dev, 2228 "drm mode invalid, pixelclock too high.\n"); 2229 return MODE_CLOCK_HIGH; 2230 } 2231 2232 DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n"); 2233 2234 return MODE_OK; 2235 } 2236 2237 static void anx7625_bridge_mode_set(struct drm_bridge *bridge, 2238 const struct drm_display_mode *old_mode, 2239 const struct drm_display_mode *mode) 2240 { 2241 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2242 struct device *dev = &ctx->client->dev; 2243 2244 DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n"); 2245 2246 ctx->dt.pixelclock.min = mode->clock; 2247 ctx->dt.hactive.min = mode->hdisplay; 2248 ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start; 2249 ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay; 2250 ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end; 2251 ctx->dt.vactive.min = mode->vdisplay; 2252 ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start; 2253 ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay; 2254 ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end; 2255 2256 ctx->display_timing_valid = 1; 2257 2258 DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min); 2259 DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n", 2260 ctx->dt.hactive.min, 2261 ctx->dt.hsync_len.min, 2262 ctx->dt.hfront_porch.min, 2263 ctx->dt.hback_porch.min); 2264 DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n", 2265 ctx->dt.vactive.min, 2266 ctx->dt.vsync_len.min, 2267 ctx->dt.vfront_porch.min, 2268 ctx->dt.vback_porch.min); 2269 DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n", 2270 mode->hdisplay, 2271 mode->hsync_start); 2272 DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n", 2273 mode->hsync_end, 2274 mode->htotal); 2275 DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n", 2276 mode->vdisplay, 2277 mode->vsync_start); 2278 DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n", 2279 mode->vsync_end, 2280 mode->vtotal); 2281 } 2282 2283 static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge, 2284 const struct drm_display_mode *mode, 2285 struct drm_display_mode *adj) 2286 { 2287 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2288 struct device *dev = &ctx->client->dev; 2289 u32 hsync, hfp, hbp, hblanking; 2290 u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj; 2291 u32 vref, adj_clock; 2292 2293 DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n"); 2294 2295 /* No need fixup for external monitor */ 2296 if (!ctx->pdata.panel_bridge) 2297 return true; 2298 2299 hsync = mode->hsync_end - mode->hsync_start; 2300 hfp = mode->hsync_start - mode->hdisplay; 2301 hbp = mode->htotal - mode->hsync_end; 2302 hblanking = mode->htotal - mode->hdisplay; 2303 2304 DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n"); 2305 DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n", 2306 hsync, hfp, hbp, adj->clock); 2307 DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n", 2308 adj->hsync_start, adj->hsync_end, adj->htotal); 2309 2310 adj_hfp = hfp; 2311 adj_hsync = hsync; 2312 adj_hbp = hbp; 2313 adj_hblanking = hblanking; 2314 2315 /* HFP needs to be even */ 2316 if (hfp & 0x1) { 2317 adj_hfp += 1; 2318 adj_hblanking += 1; 2319 } 2320 2321 /* HBP needs to be even */ 2322 if (hbp & 0x1) { 2323 adj_hbp -= 1; 2324 adj_hblanking -= 1; 2325 } 2326 2327 /* HSYNC needs to be even */ 2328 if (hsync & 0x1) { 2329 if (adj_hblanking < hblanking) 2330 adj_hsync += 1; 2331 else 2332 adj_hsync -= 1; 2333 } 2334 2335 /* 2336 * Once illegal timing detected, use default HFP, HSYNC, HBP 2337 * This adjusting made for built-in eDP panel, for the externel 2338 * DP monitor, may need return false. 2339 */ 2340 if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) { 2341 adj_hsync = SYNC_LEN_DEF; 2342 adj_hfp = HFP_HBP_DEF; 2343 adj_hbp = HFP_HBP_DEF; 2344 vref = adj->clock * 1000 / (adj->htotal * adj->vtotal); 2345 if (hblanking < HBLANKING_MIN) { 2346 delta_adj = HBLANKING_MIN - hblanking; 2347 adj_clock = vref * delta_adj * adj->vtotal; 2348 adj->clock += DIV_ROUND_UP(adj_clock, 1000); 2349 } else { 2350 delta_adj = hblanking - HBLANKING_MIN; 2351 adj_clock = vref * delta_adj * adj->vtotal; 2352 adj->clock -= DIV_ROUND_UP(adj_clock, 1000); 2353 } 2354 2355 DRM_WARN("illegal hblanking timing, use default.\n"); 2356 DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync); 2357 } else if (adj_hfp < HP_MIN) { 2358 /* Adjust hfp if hfp less than HP_MIN */ 2359 delta_adj = HP_MIN - adj_hfp; 2360 adj_hfp = HP_MIN; 2361 2362 /* 2363 * Balance total HBlanking pixel, if HBP does not have enough 2364 * space, adjust HSYNC length, otherwise adjust HBP 2365 */ 2366 if ((adj_hbp - delta_adj) < HP_MIN) 2367 /* HBP not enough space */ 2368 adj_hsync -= delta_adj; 2369 else 2370 adj_hbp -= delta_adj; 2371 } else if (adj_hbp < HP_MIN) { 2372 delta_adj = HP_MIN - adj_hbp; 2373 adj_hbp = HP_MIN; 2374 2375 /* 2376 * Balance total HBlanking pixel, if HBP hasn't enough space, 2377 * adjust HSYNC length, otherwize adjust HBP 2378 */ 2379 if ((adj_hfp - delta_adj) < HP_MIN) 2380 /* HFP not enough space */ 2381 adj_hsync -= delta_adj; 2382 else 2383 adj_hfp -= delta_adj; 2384 } 2385 2386 DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n"); 2387 DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n", 2388 adj_hsync, adj_hfp, adj_hbp, adj->clock); 2389 2390 /* Reconstruct timing */ 2391 adj->hsync_start = adj->hdisplay + adj_hfp; 2392 adj->hsync_end = adj->hsync_start + adj_hsync; 2393 adj->htotal = adj->hsync_end + adj_hbp; 2394 DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n", 2395 adj->hsync_start, adj->hsync_end, adj->htotal); 2396 2397 return true; 2398 } 2399 2400 static int anx7625_bridge_atomic_check(struct drm_bridge *bridge, 2401 struct drm_bridge_state *bridge_state, 2402 struct drm_crtc_state *crtc_state, 2403 struct drm_connector_state *conn_state) 2404 { 2405 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2406 struct device *dev = &ctx->client->dev; 2407 2408 dev_dbg(dev, "drm bridge atomic check\n"); 2409 2410 anx7625_bridge_mode_fixup(bridge, &crtc_state->mode, 2411 &crtc_state->adjusted_mode); 2412 2413 return anx7625_connector_atomic_check(ctx, conn_state); 2414 } 2415 2416 static void anx7625_bridge_atomic_enable(struct drm_bridge *bridge, 2417 struct drm_bridge_state *state) 2418 { 2419 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2420 struct device *dev = &ctx->client->dev; 2421 struct drm_connector *connector; 2422 2423 dev_dbg(dev, "drm atomic enable\n"); 2424 2425 if (!bridge->encoder) { 2426 dev_err(dev, "Parent encoder object not found"); 2427 return; 2428 } 2429 2430 connector = drm_atomic_get_new_connector_for_encoder(state->base.state, 2431 bridge->encoder); 2432 if (!connector) 2433 return; 2434 2435 ctx->connector = connector; 2436 2437 pm_runtime_get_sync(dev); 2438 _anx7625_hpd_polling(ctx, 5000 * 100); 2439 2440 anx7625_dp_start(ctx); 2441 } 2442 2443 static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge, 2444 struct drm_bridge_state *old) 2445 { 2446 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2447 struct device *dev = &ctx->client->dev; 2448 2449 dev_dbg(dev, "drm atomic disable\n"); 2450 2451 ctx->connector = NULL; 2452 anx7625_dp_stop(ctx); 2453 2454 pm_runtime_put_sync(dev); 2455 } 2456 2457 static enum drm_connector_status 2458 anx7625_bridge_detect(struct drm_bridge *bridge) 2459 { 2460 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2461 struct device *dev = &ctx->client->dev; 2462 2463 DRM_DEV_DEBUG_DRIVER(dev, "drm bridge detect\n"); 2464 2465 return anx7625_sink_detect(ctx); 2466 } 2467 2468 static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge, 2469 struct drm_connector *connector) 2470 { 2471 struct anx7625_data *ctx = bridge_to_anx7625(bridge); 2472 struct device *dev = &ctx->client->dev; 2473 2474 DRM_DEV_DEBUG_DRIVER(dev, "drm bridge get edid\n"); 2475 2476 return anx7625_get_edid(ctx); 2477 } 2478 2479 static const struct drm_bridge_funcs anx7625_bridge_funcs = { 2480 .attach = anx7625_bridge_attach, 2481 .detach = anx7625_bridge_detach, 2482 .mode_valid = anx7625_bridge_mode_valid, 2483 .mode_set = anx7625_bridge_mode_set, 2484 .atomic_check = anx7625_bridge_atomic_check, 2485 .atomic_enable = anx7625_bridge_atomic_enable, 2486 .atomic_disable = anx7625_bridge_atomic_disable, 2487 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 2488 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 2489 .atomic_reset = drm_atomic_helper_bridge_reset, 2490 .detect = anx7625_bridge_detect, 2491 .get_edid = anx7625_bridge_get_edid, 2492 }; 2493 2494 static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx, 2495 struct i2c_client *client) 2496 { 2497 struct device *dev = &ctx->client->dev; 2498 2499 ctx->i2c.tx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter, 2500 TX_P0_ADDR >> 1); 2501 if (IS_ERR(ctx->i2c.tx_p0_client)) 2502 return PTR_ERR(ctx->i2c.tx_p0_client); 2503 2504 ctx->i2c.tx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter, 2505 TX_P1_ADDR >> 1); 2506 if (IS_ERR(ctx->i2c.tx_p1_client)) 2507 return PTR_ERR(ctx->i2c.tx_p1_client); 2508 2509 ctx->i2c.tx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter, 2510 TX_P2_ADDR >> 1); 2511 if (IS_ERR(ctx->i2c.tx_p2_client)) 2512 return PTR_ERR(ctx->i2c.tx_p2_client); 2513 2514 ctx->i2c.rx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter, 2515 RX_P0_ADDR >> 1); 2516 if (IS_ERR(ctx->i2c.rx_p0_client)) 2517 return PTR_ERR(ctx->i2c.rx_p0_client); 2518 2519 ctx->i2c.rx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter, 2520 RX_P1_ADDR >> 1); 2521 if (IS_ERR(ctx->i2c.rx_p1_client)) 2522 return PTR_ERR(ctx->i2c.rx_p1_client); 2523 2524 ctx->i2c.rx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter, 2525 RX_P2_ADDR >> 1); 2526 if (IS_ERR(ctx->i2c.rx_p2_client)) 2527 return PTR_ERR(ctx->i2c.rx_p2_client); 2528 2529 ctx->i2c.tcpc_client = devm_i2c_new_dummy_device(dev, client->adapter, 2530 TCPC_INTERFACE_ADDR >> 1); 2531 if (IS_ERR(ctx->i2c.tcpc_client)) 2532 return PTR_ERR(ctx->i2c.tcpc_client); 2533 2534 return 0; 2535 } 2536 2537 static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev) 2538 { 2539 struct anx7625_data *ctx = dev_get_drvdata(dev); 2540 2541 mutex_lock(&ctx->lock); 2542 2543 anx7625_stop_dp_work(ctx); 2544 anx7625_power_standby(ctx); 2545 2546 mutex_unlock(&ctx->lock); 2547 2548 return 0; 2549 } 2550 2551 static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev) 2552 { 2553 struct anx7625_data *ctx = dev_get_drvdata(dev); 2554 2555 mutex_lock(&ctx->lock); 2556 2557 anx7625_power_on_init(ctx); 2558 2559 mutex_unlock(&ctx->lock); 2560 2561 return 0; 2562 } 2563 2564 static const struct dev_pm_ops anx7625_pm_ops = { 2565 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 2566 pm_runtime_force_resume) 2567 SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend, 2568 anx7625_runtime_pm_resume, NULL) 2569 }; 2570 2571 static void anx7625_runtime_disable(void *data) 2572 { 2573 pm_runtime_dont_use_autosuspend(data); 2574 pm_runtime_disable(data); 2575 } 2576 2577 static int anx7625_link_bridge(struct drm_dp_aux *aux) 2578 { 2579 struct anx7625_data *platform = container_of(aux, struct anx7625_data, aux); 2580 struct device *dev = aux->dev; 2581 int ret; 2582 2583 ret = anx7625_parse_dt_panel(dev, &platform->pdata); 2584 if (ret) { 2585 DRM_DEV_ERROR(dev, "fail to parse DT for panel : %d\n", ret); 2586 return ret; 2587 } 2588 2589 platform->bridge.funcs = &anx7625_bridge_funcs; 2590 platform->bridge.of_node = dev->of_node; 2591 if (!anx7625_of_panel_on_aux_bus(dev)) 2592 platform->bridge.ops |= DRM_BRIDGE_OP_EDID; 2593 if (!platform->pdata.panel_bridge) 2594 platform->bridge.ops |= DRM_BRIDGE_OP_HPD | 2595 DRM_BRIDGE_OP_DETECT; 2596 platform->bridge.type = platform->pdata.panel_bridge ? 2597 DRM_MODE_CONNECTOR_eDP : 2598 DRM_MODE_CONNECTOR_DisplayPort; 2599 2600 drm_bridge_add(&platform->bridge); 2601 2602 if (!platform->pdata.is_dpi) { 2603 ret = anx7625_attach_dsi(platform); 2604 if (ret) 2605 drm_bridge_remove(&platform->bridge); 2606 } 2607 2608 return ret; 2609 } 2610 2611 static int anx7625_i2c_probe(struct i2c_client *client) 2612 { 2613 struct anx7625_data *platform; 2614 struct anx7625_platform_data *pdata; 2615 int ret = 0; 2616 struct device *dev = &client->dev; 2617 2618 if (!i2c_check_functionality(client->adapter, 2619 I2C_FUNC_SMBUS_I2C_BLOCK)) { 2620 DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n"); 2621 return -ENODEV; 2622 } 2623 2624 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL); 2625 if (!platform) { 2626 DRM_DEV_ERROR(dev, "fail to allocate driver data\n"); 2627 return -ENOMEM; 2628 } 2629 2630 pdata = &platform->pdata; 2631 2632 platform->client = client; 2633 i2c_set_clientdata(client, platform); 2634 2635 pdata->supplies[0].supply = "vdd10"; 2636 pdata->supplies[1].supply = "vdd18"; 2637 pdata->supplies[2].supply = "vdd33"; 2638 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies), 2639 pdata->supplies); 2640 if (ret) { 2641 DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret); 2642 return ret; 2643 } 2644 anx7625_init_gpio(platform); 2645 2646 mutex_init(&platform->lock); 2647 mutex_init(&platform->hdcp_wq_lock); 2648 2649 INIT_DELAYED_WORK(&platform->hdcp_work, hdcp_check_work_func); 2650 platform->hdcp_workqueue = create_workqueue("hdcp workqueue"); 2651 if (!platform->hdcp_workqueue) { 2652 dev_err(dev, "fail to create work queue\n"); 2653 ret = -ENOMEM; 2654 return ret; 2655 } 2656 2657 platform->pdata.intp_irq = client->irq; 2658 if (platform->pdata.intp_irq) { 2659 INIT_WORK(&platform->work, anx7625_work_func); 2660 platform->workqueue = alloc_workqueue("anx7625_work", 2661 WQ_FREEZABLE | WQ_MEM_RECLAIM, 1); 2662 if (!platform->workqueue) { 2663 DRM_DEV_ERROR(dev, "fail to create work queue\n"); 2664 ret = -ENOMEM; 2665 goto free_hdcp_wq; 2666 } 2667 2668 ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq, 2669 NULL, anx7625_intr_hpd_isr, 2670 IRQF_TRIGGER_FALLING | 2671 IRQF_ONESHOT, 2672 "anx7625-intp", platform); 2673 if (ret) { 2674 DRM_DEV_ERROR(dev, "fail to request irq\n"); 2675 goto free_wq; 2676 } 2677 } 2678 2679 platform->aux.name = "anx7625-aux"; 2680 platform->aux.dev = dev; 2681 platform->aux.transfer = anx7625_aux_transfer; 2682 platform->aux.wait_hpd_asserted = anx7625_wait_hpd_asserted; 2683 drm_dp_aux_init(&platform->aux); 2684 2685 ret = anx7625_parse_dt(dev, pdata); 2686 if (ret) { 2687 if (ret != -EPROBE_DEFER) 2688 DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); 2689 goto free_wq; 2690 } 2691 2692 if (!platform->pdata.is_dpi) { 2693 ret = anx7625_setup_dsi_device(platform); 2694 if (ret < 0) 2695 goto free_wq; 2696 } 2697 2698 /* 2699 * Registering the i2c devices will retrigger deferred probe, so it 2700 * needs to be done after calls that might return EPROBE_DEFER, 2701 * otherwise we can get an infinite loop. 2702 */ 2703 if (anx7625_register_i2c_dummy_clients(platform, client) != 0) { 2704 ret = -ENOMEM; 2705 DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n"); 2706 goto free_wq; 2707 } 2708 2709 pm_runtime_enable(dev); 2710 pm_runtime_set_autosuspend_delay(dev, 1000); 2711 pm_runtime_use_autosuspend(dev); 2712 pm_suspend_ignore_children(dev, true); 2713 ret = devm_add_action_or_reset(dev, anx7625_runtime_disable, dev); 2714 if (ret) 2715 goto free_wq; 2716 2717 /* 2718 * Populating the aux bus will retrigger deferred probe, so it needs to 2719 * be done after calls that might return EPROBE_DEFER, otherwise we can 2720 * get an infinite loop. 2721 */ 2722 ret = devm_of_dp_aux_populate_bus(&platform->aux, anx7625_link_bridge); 2723 if (ret) { 2724 if (ret != -ENODEV) { 2725 DRM_DEV_ERROR(dev, "failed to populate aux bus : %d\n", ret); 2726 goto free_wq; 2727 } 2728 2729 ret = anx7625_link_bridge(&platform->aux); 2730 if (ret) 2731 goto free_wq; 2732 } 2733 2734 if (!platform->pdata.low_power_mode) { 2735 anx7625_disable_pd_protocol(platform); 2736 pm_runtime_get_sync(dev); 2737 _anx7625_hpd_polling(platform, 5000 * 100); 2738 } 2739 2740 /* Add work function */ 2741 if (platform->pdata.intp_irq) 2742 queue_work(platform->workqueue, &platform->work); 2743 2744 if (platform->pdata.audio_en) 2745 anx7625_register_audio(dev, platform); 2746 2747 DRM_DEV_DEBUG_DRIVER(dev, "probe done\n"); 2748 2749 return 0; 2750 2751 free_wq: 2752 if (platform->workqueue) 2753 destroy_workqueue(platform->workqueue); 2754 2755 free_hdcp_wq: 2756 if (platform->hdcp_workqueue) 2757 destroy_workqueue(platform->hdcp_workqueue); 2758 2759 return ret; 2760 } 2761 2762 static void anx7625_i2c_remove(struct i2c_client *client) 2763 { 2764 struct anx7625_data *platform = i2c_get_clientdata(client); 2765 2766 drm_bridge_remove(&platform->bridge); 2767 2768 if (platform->pdata.intp_irq) 2769 destroy_workqueue(platform->workqueue); 2770 2771 if (platform->hdcp_workqueue) { 2772 cancel_delayed_work(&platform->hdcp_work); 2773 flush_workqueue(platform->hdcp_workqueue); 2774 destroy_workqueue(platform->hdcp_workqueue); 2775 } 2776 2777 if (!platform->pdata.low_power_mode) 2778 pm_runtime_put_sync_suspend(&client->dev); 2779 2780 if (platform->pdata.audio_en) 2781 anx7625_unregister_audio(platform); 2782 } 2783 2784 static const struct i2c_device_id anx7625_id[] = { 2785 {"anx7625", 0}, 2786 {} 2787 }; 2788 2789 MODULE_DEVICE_TABLE(i2c, anx7625_id); 2790 2791 static const struct of_device_id anx_match_table[] = { 2792 {.compatible = "analogix,anx7625",}, 2793 {}, 2794 }; 2795 MODULE_DEVICE_TABLE(of, anx_match_table); 2796 2797 static struct i2c_driver anx7625_driver = { 2798 .driver = { 2799 .name = "anx7625", 2800 .of_match_table = anx_match_table, 2801 .pm = &anx7625_pm_ops, 2802 }, 2803 .probe = anx7625_i2c_probe, 2804 .remove = anx7625_i2c_remove, 2805 2806 .id_table = anx7625_id, 2807 }; 2808 2809 module_i2c_driver(anx7625_driver); 2810 2811 MODULE_DESCRIPTION("MIPI2DP anx7625 driver"); 2812 MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>"); 2813 MODULE_LICENSE("GPL v2"); 2814 MODULE_VERSION(ANX7625_DRV_VERSION); 2815