1/* 2 * Copyright © 2012 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 * Authors: 24 * Keith Packard <keithp@keithp.com> 25 * 26 */ 27 28#include <linux/i2c.h> 29#include <linux/module.h> 30#include <linux/slab.h> 31 32#include <drm/drm_crtc.h> 33#include <drm/drm_crtc_helper.h> 34#include <drm/drm_dp_helper.h> 35#include <drm/drm_simple_kms_helper.h> 36 37#include "gma_display.h" 38#include "psb_drv.h" 39#include "psb_intel_drv.h" 40#include "psb_intel_reg.h" 41 42/** 43 * struct i2c_algo_dp_aux_data - driver interface structure for i2c over dp 44 * aux algorithm 45 * @running: set by the algo indicating whether an i2c is ongoing or whether 46 * the i2c bus is quiescent 47 * @address: i2c target address for the currently ongoing transfer 48 * @aux_ch: driver callback to transfer a single byte of the i2c payload 49 */ 50struct i2c_algo_dp_aux_data { 51 bool running; 52 u16 address; 53 int (*aux_ch) (struct i2c_adapter *adapter, 54 int mode, uint8_t write_byte, 55 uint8_t *read_byte); 56}; 57 58/* Run a single AUX_CH I2C transaction, writing/reading data as necessary */ 59static int 60i2c_algo_dp_aux_transaction(struct i2c_adapter *adapter, int mode, 61 uint8_t write_byte, uint8_t *read_byte) 62{ 63 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 64 int ret; 65 66 ret = (*algo_data->aux_ch)(adapter, mode, 67 write_byte, read_byte); 68 return ret; 69} 70 71/* 72 * I2C over AUX CH 73 */ 74 75/* 76 * Send the address. If the I2C link is running, this 'restarts' 77 * the connection with the new address, this is used for doing 78 * a write followed by a read (as needed for DDC) 79 */ 80static int 81i2c_algo_dp_aux_address(struct i2c_adapter *adapter, u16 address, bool reading) 82{ 83 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 84 int mode = MODE_I2C_START; 85 int ret; 86 87 if (reading) 88 mode |= MODE_I2C_READ; 89 else 90 mode |= MODE_I2C_WRITE; 91 algo_data->address = address; 92 algo_data->running = true; 93 ret = i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL); 94 return ret; 95} 96 97/* 98 * Stop the I2C transaction. This closes out the link, sending 99 * a bare address packet with the MOT bit turned off 100 */ 101static void 102i2c_algo_dp_aux_stop(struct i2c_adapter *adapter, bool reading) 103{ 104 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 105 int mode = MODE_I2C_STOP; 106 107 if (reading) 108 mode |= MODE_I2C_READ; 109 else 110 mode |= MODE_I2C_WRITE; 111 if (algo_data->running) { 112 (void) i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL); 113 algo_data->running = false; 114 } 115} 116 117/* 118 * Write a single byte to the current I2C address, the 119 * the I2C link must be running or this returns -EIO 120 */ 121static int 122i2c_algo_dp_aux_put_byte(struct i2c_adapter *adapter, u8 byte) 123{ 124 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 125 int ret; 126 127 if (!algo_data->running) 128 return -EIO; 129 130 ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_WRITE, byte, NULL); 131 return ret; 132} 133 134/* 135 * Read a single byte from the current I2C address, the 136 * I2C link must be running or this returns -EIO 137 */ 138static int 139i2c_algo_dp_aux_get_byte(struct i2c_adapter *adapter, u8 *byte_ret) 140{ 141 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 142 int ret; 143 144 if (!algo_data->running) 145 return -EIO; 146 147 ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_READ, 0, byte_ret); 148 return ret; 149} 150 151static int 152i2c_algo_dp_aux_xfer(struct i2c_adapter *adapter, 153 struct i2c_msg *msgs, 154 int num) 155{ 156 int ret = 0; 157 bool reading = false; 158 int m; 159 int b; 160 161 for (m = 0; m < num; m++) { 162 u16 len = msgs[m].len; 163 u8 *buf = msgs[m].buf; 164 reading = (msgs[m].flags & I2C_M_RD) != 0; 165 ret = i2c_algo_dp_aux_address(adapter, msgs[m].addr, reading); 166 if (ret < 0) 167 break; 168 if (reading) { 169 for (b = 0; b < len; b++) { 170 ret = i2c_algo_dp_aux_get_byte(adapter, &buf[b]); 171 if (ret < 0) 172 break; 173 } 174 } else { 175 for (b = 0; b < len; b++) { 176 ret = i2c_algo_dp_aux_put_byte(adapter, buf[b]); 177 if (ret < 0) 178 break; 179 } 180 } 181 if (ret < 0) 182 break; 183 } 184 if (ret >= 0) 185 ret = num; 186 i2c_algo_dp_aux_stop(adapter, reading); 187 DRM_DEBUG_KMS("dp_aux_xfer return %d\n", ret); 188 return ret; 189} 190 191static u32 192i2c_algo_dp_aux_functionality(struct i2c_adapter *adapter) 193{ 194 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | 195 I2C_FUNC_SMBUS_READ_BLOCK_DATA | 196 I2C_FUNC_SMBUS_BLOCK_PROC_CALL | 197 I2C_FUNC_10BIT_ADDR; 198} 199 200static const struct i2c_algorithm i2c_dp_aux_algo = { 201 .master_xfer = i2c_algo_dp_aux_xfer, 202 .functionality = i2c_algo_dp_aux_functionality, 203}; 204 205static void 206i2c_dp_aux_reset_bus(struct i2c_adapter *adapter) 207{ 208 (void) i2c_algo_dp_aux_address(adapter, 0, false); 209 (void) i2c_algo_dp_aux_stop(adapter, false); 210} 211 212static int 213i2c_dp_aux_prepare_bus(struct i2c_adapter *adapter) 214{ 215 adapter->algo = &i2c_dp_aux_algo; 216 adapter->retries = 3; 217 i2c_dp_aux_reset_bus(adapter); 218 return 0; 219} 220 221/* 222 * FIXME: This is the old dp aux helper, gma500 is the last driver that needs to 223 * be ported over to the new helper code in drm_dp_helper.c like i915 or radeon. 224 */ 225static int 226i2c_dp_aux_add_bus(struct i2c_adapter *adapter) 227{ 228 int error; 229 230 error = i2c_dp_aux_prepare_bus(adapter); 231 if (error) 232 return error; 233 error = i2c_add_adapter(adapter); 234 return error; 235} 236 237#define _wait_for(COND, MS, W) ({ \ 238 unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \ 239 int ret__ = 0; \ 240 while (! (COND)) { \ 241 if (time_after(jiffies, timeout__)) { \ 242 ret__ = -ETIMEDOUT; \ 243 break; \ 244 } \ 245 if (W && !in_dbg_master()) msleep(W); \ 246 } \ 247 ret__; \ 248}) 249 250#define wait_for(COND, MS) _wait_for(COND, MS, 1) 251 252#define DP_LINK_CHECK_TIMEOUT (10 * 1000) 253 254#define DP_LINK_CONFIGURATION_SIZE 9 255 256#define CDV_FAST_LINK_TRAIN 1 257 258struct cdv_intel_dp { 259 uint32_t output_reg; 260 uint32_t DP; 261 uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]; 262 bool has_audio; 263 int force_audio; 264 uint32_t color_range; 265 uint8_t link_bw; 266 uint8_t lane_count; 267 uint8_t dpcd[4]; 268 struct gma_encoder *encoder; 269 struct i2c_adapter adapter; 270 struct i2c_algo_dp_aux_data algo; 271 uint8_t train_set[4]; 272 uint8_t link_status[DP_LINK_STATUS_SIZE]; 273 int panel_power_up_delay; 274 int panel_power_down_delay; 275 int panel_power_cycle_delay; 276 int backlight_on_delay; 277 int backlight_off_delay; 278 struct drm_display_mode *panel_fixed_mode; /* for eDP */ 279 bool panel_on; 280}; 281 282struct ddi_regoff { 283 uint32_t PreEmph1; 284 uint32_t PreEmph2; 285 uint32_t VSwing1; 286 uint32_t VSwing2; 287 uint32_t VSwing3; 288 uint32_t VSwing4; 289 uint32_t VSwing5; 290}; 291 292static struct ddi_regoff ddi_DP_train_table[] = { 293 {.PreEmph1 = 0x812c, .PreEmph2 = 0x8124, .VSwing1 = 0x8154, 294 .VSwing2 = 0x8148, .VSwing3 = 0x814C, .VSwing4 = 0x8150, 295 .VSwing5 = 0x8158,}, 296 {.PreEmph1 = 0x822c, .PreEmph2 = 0x8224, .VSwing1 = 0x8254, 297 .VSwing2 = 0x8248, .VSwing3 = 0x824C, .VSwing4 = 0x8250, 298 .VSwing5 = 0x8258,}, 299}; 300 301static uint32_t dp_vswing_premph_table[] = { 302 0x55338954, 0x4000, 303 0x554d8954, 0x2000, 304 0x55668954, 0, 305 0x559ac0d4, 0x6000, 306}; 307/** 308 * is_edp - is the given port attached to an eDP panel (either CPU or PCH) 309 * @intel_dp: DP struct 310 * 311 * If a CPU or PCH DP output is attached to an eDP panel, this function 312 * will return true, and false otherwise. 313 */ 314static bool is_edp(struct gma_encoder *encoder) 315{ 316 return encoder->type == INTEL_OUTPUT_EDP; 317} 318 319 320static void cdv_intel_dp_start_link_train(struct gma_encoder *encoder); 321static void cdv_intel_dp_complete_link_train(struct gma_encoder *encoder); 322static void cdv_intel_dp_link_down(struct gma_encoder *encoder); 323 324static int 325cdv_intel_dp_max_lane_count(struct gma_encoder *encoder) 326{ 327 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 328 int max_lane_count = 4; 329 330 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) { 331 max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; 332 switch (max_lane_count) { 333 case 1: case 2: case 4: 334 break; 335 default: 336 max_lane_count = 4; 337 } 338 } 339 return max_lane_count; 340} 341 342static int 343cdv_intel_dp_max_link_bw(struct gma_encoder *encoder) 344{ 345 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 346 int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; 347 348 switch (max_link_bw) { 349 case DP_LINK_BW_1_62: 350 case DP_LINK_BW_2_7: 351 break; 352 default: 353 max_link_bw = DP_LINK_BW_1_62; 354 break; 355 } 356 return max_link_bw; 357} 358 359static int 360cdv_intel_dp_link_clock(uint8_t link_bw) 361{ 362 if (link_bw == DP_LINK_BW_2_7) 363 return 270000; 364 else 365 return 162000; 366} 367 368static int 369cdv_intel_dp_link_required(int pixel_clock, int bpp) 370{ 371 return (pixel_clock * bpp + 7) / 8; 372} 373 374static int 375cdv_intel_dp_max_data_rate(int max_link_clock, int max_lanes) 376{ 377 return (max_link_clock * max_lanes * 19) / 20; 378} 379 380static void cdv_intel_edp_panel_vdd_on(struct gma_encoder *intel_encoder) 381{ 382 struct drm_device *dev = intel_encoder->base.dev; 383 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 384 u32 pp; 385 386 if (intel_dp->panel_on) { 387 DRM_DEBUG_KMS("Skip VDD on because of panel on\n"); 388 return; 389 } 390 DRM_DEBUG_KMS("\n"); 391 392 pp = REG_READ(PP_CONTROL); 393 394 pp |= EDP_FORCE_VDD; 395 REG_WRITE(PP_CONTROL, pp); 396 REG_READ(PP_CONTROL); 397 msleep(intel_dp->panel_power_up_delay); 398} 399 400static void cdv_intel_edp_panel_vdd_off(struct gma_encoder *intel_encoder) 401{ 402 struct drm_device *dev = intel_encoder->base.dev; 403 u32 pp; 404 405 DRM_DEBUG_KMS("\n"); 406 pp = REG_READ(PP_CONTROL); 407 408 pp &= ~EDP_FORCE_VDD; 409 REG_WRITE(PP_CONTROL, pp); 410 REG_READ(PP_CONTROL); 411 412} 413 414/* Returns true if the panel was already on when called */ 415static bool cdv_intel_edp_panel_on(struct gma_encoder *intel_encoder) 416{ 417 struct drm_device *dev = intel_encoder->base.dev; 418 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 419 u32 pp, idle_on_mask = PP_ON | PP_SEQUENCE_NONE; 420 421 if (intel_dp->panel_on) 422 return true; 423 424 DRM_DEBUG_KMS("\n"); 425 pp = REG_READ(PP_CONTROL); 426 pp &= ~PANEL_UNLOCK_MASK; 427 428 pp |= (PANEL_UNLOCK_REGS | POWER_TARGET_ON); 429 REG_WRITE(PP_CONTROL, pp); 430 REG_READ(PP_CONTROL); 431 432 if (wait_for(((REG_READ(PP_STATUS) & idle_on_mask) == idle_on_mask), 1000)) { 433 DRM_DEBUG_KMS("Error in Powering up eDP panel, status %x\n", REG_READ(PP_STATUS)); 434 intel_dp->panel_on = false; 435 } else 436 intel_dp->panel_on = true; 437 msleep(intel_dp->panel_power_up_delay); 438 439 return false; 440} 441 442static void cdv_intel_edp_panel_off (struct gma_encoder *intel_encoder) 443{ 444 struct drm_device *dev = intel_encoder->base.dev; 445 u32 pp, idle_off_mask = PP_ON ; 446 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 447 448 DRM_DEBUG_KMS("\n"); 449 450 pp = REG_READ(PP_CONTROL); 451 452 if ((pp & POWER_TARGET_ON) == 0) 453 return; 454 455 intel_dp->panel_on = false; 456 pp &= ~PANEL_UNLOCK_MASK; 457 /* ILK workaround: disable reset around power sequence */ 458 459 pp &= ~POWER_TARGET_ON; 460 pp &= ~EDP_FORCE_VDD; 461 pp &= ~EDP_BLC_ENABLE; 462 REG_WRITE(PP_CONTROL, pp); 463 REG_READ(PP_CONTROL); 464 DRM_DEBUG_KMS("PP_STATUS %x\n", REG_READ(PP_STATUS)); 465 466 if (wait_for((REG_READ(PP_STATUS) & idle_off_mask) == 0, 1000)) { 467 DRM_DEBUG_KMS("Error in turning off Panel\n"); 468 } 469 470 msleep(intel_dp->panel_power_cycle_delay); 471 DRM_DEBUG_KMS("Over\n"); 472} 473 474static void cdv_intel_edp_backlight_on (struct gma_encoder *intel_encoder) 475{ 476 struct drm_device *dev = intel_encoder->base.dev; 477 u32 pp; 478 479 DRM_DEBUG_KMS("\n"); 480 /* 481 * If we enable the backlight right away following a panel power 482 * on, we may see slight flicker as the panel syncs with the eDP 483 * link. So delay a bit to make sure the image is solid before 484 * allowing it to appear. 485 */ 486 msleep(300); 487 pp = REG_READ(PP_CONTROL); 488 489 pp |= EDP_BLC_ENABLE; 490 REG_WRITE(PP_CONTROL, pp); 491 gma_backlight_enable(dev); 492} 493 494static void cdv_intel_edp_backlight_off (struct gma_encoder *intel_encoder) 495{ 496 struct drm_device *dev = intel_encoder->base.dev; 497 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 498 u32 pp; 499 500 DRM_DEBUG_KMS("\n"); 501 gma_backlight_disable(dev); 502 msleep(10); 503 pp = REG_READ(PP_CONTROL); 504 505 pp &= ~EDP_BLC_ENABLE; 506 REG_WRITE(PP_CONTROL, pp); 507 msleep(intel_dp->backlight_off_delay); 508} 509 510static enum drm_mode_status 511cdv_intel_dp_mode_valid(struct drm_connector *connector, 512 struct drm_display_mode *mode) 513{ 514 struct gma_encoder *encoder = gma_attached_encoder(connector); 515 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 516 int max_link_clock = cdv_intel_dp_link_clock(cdv_intel_dp_max_link_bw(encoder)); 517 int max_lanes = cdv_intel_dp_max_lane_count(encoder); 518 struct drm_psb_private *dev_priv = connector->dev->dev_private; 519 520 if (is_edp(encoder) && intel_dp->panel_fixed_mode) { 521 if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay) 522 return MODE_PANEL; 523 if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay) 524 return MODE_PANEL; 525 } 526 527 /* only refuse the mode on non eDP since we have seen some weird eDP panels 528 which are outside spec tolerances but somehow work by magic */ 529 if (!is_edp(encoder) && 530 (cdv_intel_dp_link_required(mode->clock, dev_priv->edp.bpp) 531 > cdv_intel_dp_max_data_rate(max_link_clock, max_lanes))) 532 return MODE_CLOCK_HIGH; 533 534 if (is_edp(encoder)) { 535 if (cdv_intel_dp_link_required(mode->clock, 24) 536 > cdv_intel_dp_max_data_rate(max_link_clock, max_lanes)) 537 return MODE_CLOCK_HIGH; 538 539 } 540 if (mode->clock < 10000) 541 return MODE_CLOCK_LOW; 542 543 return MODE_OK; 544} 545 546static uint32_t 547pack_aux(uint8_t *src, int src_bytes) 548{ 549 int i; 550 uint32_t v = 0; 551 552 if (src_bytes > 4) 553 src_bytes = 4; 554 for (i = 0; i < src_bytes; i++) 555 v |= ((uint32_t) src[i]) << ((3-i) * 8); 556 return v; 557} 558 559static void 560unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) 561{ 562 int i; 563 if (dst_bytes > 4) 564 dst_bytes = 4; 565 for (i = 0; i < dst_bytes; i++) 566 dst[i] = src >> ((3-i) * 8); 567} 568 569static int 570cdv_intel_dp_aux_ch(struct gma_encoder *encoder, 571 uint8_t *send, int send_bytes, 572 uint8_t *recv, int recv_size) 573{ 574 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 575 uint32_t output_reg = intel_dp->output_reg; 576 struct drm_device *dev = encoder->base.dev; 577 uint32_t ch_ctl = output_reg + 0x10; 578 uint32_t ch_data = ch_ctl + 4; 579 int i; 580 int recv_bytes; 581 uint32_t status; 582 uint32_t aux_clock_divider; 583 int try, precharge; 584 585 /* The clock divider is based off the hrawclk, 586 * and would like to run at 2MHz. So, take the 587 * hrawclk value and divide by 2 and use that 588 * On CDV platform it uses 200MHz as hrawclk. 589 * 590 */ 591 aux_clock_divider = 200 / 2; 592 593 precharge = 4; 594 if (is_edp(encoder)) 595 precharge = 10; 596 597 if (REG_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) { 598 DRM_ERROR("dp_aux_ch not started status 0x%08x\n", 599 REG_READ(ch_ctl)); 600 return -EBUSY; 601 } 602 603 /* Must try at least 3 times according to DP spec */ 604 for (try = 0; try < 5; try++) { 605 /* Load the send data into the aux channel data registers */ 606 for (i = 0; i < send_bytes; i += 4) 607 REG_WRITE(ch_data + i, 608 pack_aux(send + i, send_bytes - i)); 609 610 /* Send the command and wait for it to complete */ 611 REG_WRITE(ch_ctl, 612 DP_AUX_CH_CTL_SEND_BUSY | 613 DP_AUX_CH_CTL_TIME_OUT_400us | 614 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | 615 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | 616 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | 617 DP_AUX_CH_CTL_DONE | 618 DP_AUX_CH_CTL_TIME_OUT_ERROR | 619 DP_AUX_CH_CTL_RECEIVE_ERROR); 620 for (;;) { 621 status = REG_READ(ch_ctl); 622 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) 623 break; 624 udelay(100); 625 } 626 627 /* Clear done status and any errors */ 628 REG_WRITE(ch_ctl, 629 status | 630 DP_AUX_CH_CTL_DONE | 631 DP_AUX_CH_CTL_TIME_OUT_ERROR | 632 DP_AUX_CH_CTL_RECEIVE_ERROR); 633 if (status & DP_AUX_CH_CTL_DONE) 634 break; 635 } 636 637 if ((status & DP_AUX_CH_CTL_DONE) == 0) { 638 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); 639 return -EBUSY; 640 } 641 642 /* Check for timeout or receive error. 643 * Timeouts occur when the sink is not connected 644 */ 645 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { 646 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); 647 return -EIO; 648 } 649 650 /* Timeouts occur when the device isn't connected, so they're 651 * "normal" -- don't fill the kernel log with these */ 652 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { 653 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); 654 return -ETIMEDOUT; 655 } 656 657 /* Unload any bytes sent back from the other side */ 658 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> 659 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); 660 if (recv_bytes > recv_size) 661 recv_bytes = recv_size; 662 663 for (i = 0; i < recv_bytes; i += 4) 664 unpack_aux(REG_READ(ch_data + i), 665 recv + i, recv_bytes - i); 666 667 return recv_bytes; 668} 669 670/* Write data to the aux channel in native mode */ 671static int 672cdv_intel_dp_aux_native_write(struct gma_encoder *encoder, 673 uint16_t address, uint8_t *send, int send_bytes) 674{ 675 int ret; 676 uint8_t msg[20]; 677 int msg_bytes; 678 uint8_t ack; 679 680 if (send_bytes > 16) 681 return -1; 682 msg[0] = DP_AUX_NATIVE_WRITE << 4; 683 msg[1] = address >> 8; 684 msg[2] = address & 0xff; 685 msg[3] = send_bytes - 1; 686 memcpy(&msg[4], send, send_bytes); 687 msg_bytes = send_bytes + 4; 688 for (;;) { 689 ret = cdv_intel_dp_aux_ch(encoder, msg, msg_bytes, &ack, 1); 690 if (ret < 0) 691 return ret; 692 ack >>= 4; 693 if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) 694 break; 695 else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER) 696 udelay(100); 697 else 698 return -EIO; 699 } 700 return send_bytes; 701} 702 703/* Write a single byte to the aux channel in native mode */ 704static int 705cdv_intel_dp_aux_native_write_1(struct gma_encoder *encoder, 706 uint16_t address, uint8_t byte) 707{ 708 return cdv_intel_dp_aux_native_write(encoder, address, &byte, 1); 709} 710 711/* read bytes from a native aux channel */ 712static int 713cdv_intel_dp_aux_native_read(struct gma_encoder *encoder, 714 uint16_t address, uint8_t *recv, int recv_bytes) 715{ 716 uint8_t msg[4]; 717 int msg_bytes; 718 uint8_t reply[20]; 719 int reply_bytes; 720 uint8_t ack; 721 int ret; 722 723 msg[0] = DP_AUX_NATIVE_READ << 4; 724 msg[1] = address >> 8; 725 msg[2] = address & 0xff; 726 msg[3] = recv_bytes - 1; 727 728 msg_bytes = 4; 729 reply_bytes = recv_bytes + 1; 730 731 for (;;) { 732 ret = cdv_intel_dp_aux_ch(encoder, msg, msg_bytes, 733 reply, reply_bytes); 734 if (ret == 0) 735 return -EPROTO; 736 if (ret < 0) 737 return ret; 738 ack = reply[0] >> 4; 739 if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) { 740 memcpy(recv, reply + 1, ret - 1); 741 return ret - 1; 742 } 743 else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER) 744 udelay(100); 745 else 746 return -EIO; 747 } 748} 749 750static int 751cdv_intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, 752 uint8_t write_byte, uint8_t *read_byte) 753{ 754 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; 755 struct cdv_intel_dp *intel_dp = container_of(adapter, 756 struct cdv_intel_dp, 757 adapter); 758 struct gma_encoder *encoder = intel_dp->encoder; 759 uint16_t address = algo_data->address; 760 uint8_t msg[5]; 761 uint8_t reply[2]; 762 unsigned retry; 763 int msg_bytes; 764 int reply_bytes; 765 int ret; 766 767 /* Set up the command byte */ 768 if (mode & MODE_I2C_READ) 769 msg[0] = DP_AUX_I2C_READ << 4; 770 else 771 msg[0] = DP_AUX_I2C_WRITE << 4; 772 773 if (!(mode & MODE_I2C_STOP)) 774 msg[0] |= DP_AUX_I2C_MOT << 4; 775 776 msg[1] = address >> 8; 777 msg[2] = address; 778 779 switch (mode) { 780 case MODE_I2C_WRITE: 781 msg[3] = 0; 782 msg[4] = write_byte; 783 msg_bytes = 5; 784 reply_bytes = 1; 785 break; 786 case MODE_I2C_READ: 787 msg[3] = 0; 788 msg_bytes = 4; 789 reply_bytes = 2; 790 break; 791 default: 792 msg_bytes = 3; 793 reply_bytes = 1; 794 break; 795 } 796 797 for (retry = 0; retry < 5; retry++) { 798 ret = cdv_intel_dp_aux_ch(encoder, 799 msg, msg_bytes, 800 reply, reply_bytes); 801 if (ret < 0) { 802 DRM_DEBUG_KMS("aux_ch failed %d\n", ret); 803 return ret; 804 } 805 806 switch ((reply[0] >> 4) & DP_AUX_NATIVE_REPLY_MASK) { 807 case DP_AUX_NATIVE_REPLY_ACK: 808 /* I2C-over-AUX Reply field is only valid 809 * when paired with AUX ACK. 810 */ 811 break; 812 case DP_AUX_NATIVE_REPLY_NACK: 813 DRM_DEBUG_KMS("aux_ch native nack\n"); 814 return -EREMOTEIO; 815 case DP_AUX_NATIVE_REPLY_DEFER: 816 udelay(100); 817 continue; 818 default: 819 DRM_ERROR("aux_ch invalid native reply 0x%02x\n", 820 reply[0]); 821 return -EREMOTEIO; 822 } 823 824 switch ((reply[0] >> 4) & DP_AUX_I2C_REPLY_MASK) { 825 case DP_AUX_I2C_REPLY_ACK: 826 if (mode == MODE_I2C_READ) { 827 *read_byte = reply[1]; 828 } 829 return reply_bytes - 1; 830 case DP_AUX_I2C_REPLY_NACK: 831 DRM_DEBUG_KMS("aux_i2c nack\n"); 832 return -EREMOTEIO; 833 case DP_AUX_I2C_REPLY_DEFER: 834 DRM_DEBUG_KMS("aux_i2c defer\n"); 835 udelay(100); 836 break; 837 default: 838 DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); 839 return -EREMOTEIO; 840 } 841 } 842 843 DRM_ERROR("too many retries, giving up\n"); 844 return -EREMOTEIO; 845} 846 847static int 848cdv_intel_dp_i2c_init(struct gma_connector *connector, 849 struct gma_encoder *encoder, const char *name) 850{ 851 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 852 int ret; 853 854 DRM_DEBUG_KMS("i2c_init %s\n", name); 855 856 intel_dp->algo.running = false; 857 intel_dp->algo.address = 0; 858 intel_dp->algo.aux_ch = cdv_intel_dp_i2c_aux_ch; 859 860 memset(&intel_dp->adapter, '\0', sizeof (intel_dp->adapter)); 861 intel_dp->adapter.owner = THIS_MODULE; 862 intel_dp->adapter.class = I2C_CLASS_DDC; 863 strncpy (intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); 864 intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; 865 intel_dp->adapter.algo_data = &intel_dp->algo; 866 intel_dp->adapter.dev.parent = connector->base.kdev; 867 868 if (is_edp(encoder)) 869 cdv_intel_edp_panel_vdd_on(encoder); 870 ret = i2c_dp_aux_add_bus(&intel_dp->adapter); 871 if (is_edp(encoder)) 872 cdv_intel_edp_panel_vdd_off(encoder); 873 874 return ret; 875} 876 877static void cdv_intel_fixed_panel_mode(struct drm_display_mode *fixed_mode, 878 struct drm_display_mode *adjusted_mode) 879{ 880 adjusted_mode->hdisplay = fixed_mode->hdisplay; 881 adjusted_mode->hsync_start = fixed_mode->hsync_start; 882 adjusted_mode->hsync_end = fixed_mode->hsync_end; 883 adjusted_mode->htotal = fixed_mode->htotal; 884 885 adjusted_mode->vdisplay = fixed_mode->vdisplay; 886 adjusted_mode->vsync_start = fixed_mode->vsync_start; 887 adjusted_mode->vsync_end = fixed_mode->vsync_end; 888 adjusted_mode->vtotal = fixed_mode->vtotal; 889 890 adjusted_mode->clock = fixed_mode->clock; 891 892 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); 893} 894 895static bool 896cdv_intel_dp_mode_fixup(struct drm_encoder *encoder, const struct drm_display_mode *mode, 897 struct drm_display_mode *adjusted_mode) 898{ 899 struct drm_psb_private *dev_priv = encoder->dev->dev_private; 900 struct gma_encoder *intel_encoder = to_gma_encoder(encoder); 901 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 902 int lane_count, clock; 903 int max_lane_count = cdv_intel_dp_max_lane_count(intel_encoder); 904 int max_clock = cdv_intel_dp_max_link_bw(intel_encoder) == DP_LINK_BW_2_7 ? 1 : 0; 905 static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; 906 int refclock = mode->clock; 907 int bpp = 24; 908 909 if (is_edp(intel_encoder) && intel_dp->panel_fixed_mode) { 910 cdv_intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode); 911 refclock = intel_dp->panel_fixed_mode->clock; 912 bpp = dev_priv->edp.bpp; 913 } 914 915 for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { 916 for (clock = max_clock; clock >= 0; clock--) { 917 int link_avail = cdv_intel_dp_max_data_rate(cdv_intel_dp_link_clock(bws[clock]), lane_count); 918 919 if (cdv_intel_dp_link_required(refclock, bpp) <= link_avail) { 920 intel_dp->link_bw = bws[clock]; 921 intel_dp->lane_count = lane_count; 922 adjusted_mode->clock = cdv_intel_dp_link_clock(intel_dp->link_bw); 923 DRM_DEBUG_KMS("Display port link bw %02x lane " 924 "count %d clock %d\n", 925 intel_dp->link_bw, intel_dp->lane_count, 926 adjusted_mode->clock); 927 return true; 928 } 929 } 930 } 931 if (is_edp(intel_encoder)) { 932 /* okay we failed just pick the highest */ 933 intel_dp->lane_count = max_lane_count; 934 intel_dp->link_bw = bws[max_clock]; 935 adjusted_mode->clock = cdv_intel_dp_link_clock(intel_dp->link_bw); 936 DRM_DEBUG_KMS("Force picking display port link bw %02x lane " 937 "count %d clock %d\n", 938 intel_dp->link_bw, intel_dp->lane_count, 939 adjusted_mode->clock); 940 941 return true; 942 } 943 return false; 944} 945 946struct cdv_intel_dp_m_n { 947 uint32_t tu; 948 uint32_t gmch_m; 949 uint32_t gmch_n; 950 uint32_t link_m; 951 uint32_t link_n; 952}; 953 954static void 955cdv_intel_reduce_ratio(uint32_t *num, uint32_t *den) 956{ 957 /* 958 while (*num > 0xffffff || *den > 0xffffff) { 959 *num >>= 1; 960 *den >>= 1; 961 }*/ 962 uint64_t value, m; 963 m = *num; 964 value = m * (0x800000); 965 m = do_div(value, *den); 966 *num = value; 967 *den = 0x800000; 968} 969 970static void 971cdv_intel_dp_compute_m_n(int bpp, 972 int nlanes, 973 int pixel_clock, 974 int link_clock, 975 struct cdv_intel_dp_m_n *m_n) 976{ 977 m_n->tu = 64; 978 m_n->gmch_m = (pixel_clock * bpp + 7) >> 3; 979 m_n->gmch_n = link_clock * nlanes; 980 cdv_intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); 981 m_n->link_m = pixel_clock; 982 m_n->link_n = link_clock; 983 cdv_intel_reduce_ratio(&m_n->link_m, &m_n->link_n); 984} 985 986void 987cdv_intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, 988 struct drm_display_mode *adjusted_mode) 989{ 990 struct drm_device *dev = crtc->dev; 991 struct drm_psb_private *dev_priv = dev->dev_private; 992 struct drm_mode_config *mode_config = &dev->mode_config; 993 struct drm_encoder *encoder; 994 struct gma_crtc *gma_crtc = to_gma_crtc(crtc); 995 int lane_count = 4, bpp = 24; 996 struct cdv_intel_dp_m_n m_n; 997 int pipe = gma_crtc->pipe; 998 999 /* 1000 * Find the lane count in the intel_encoder private 1001 */ 1002 list_for_each_entry(encoder, &mode_config->encoder_list, head) { 1003 struct gma_encoder *intel_encoder; 1004 struct cdv_intel_dp *intel_dp; 1005 1006 if (encoder->crtc != crtc) 1007 continue; 1008 1009 intel_encoder = to_gma_encoder(encoder); 1010 intel_dp = intel_encoder->dev_priv; 1011 if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) { 1012 lane_count = intel_dp->lane_count; 1013 break; 1014 } else if (is_edp(intel_encoder)) { 1015 lane_count = intel_dp->lane_count; 1016 bpp = dev_priv->edp.bpp; 1017 break; 1018 } 1019 } 1020 1021 /* 1022 * Compute the GMCH and Link ratios. The '3' here is 1023 * the number of bytes_per_pixel post-LUT, which we always 1024 * set up for 8-bits of R/G/B, or 3 bytes total. 1025 */ 1026 cdv_intel_dp_compute_m_n(bpp, lane_count, 1027 mode->clock, adjusted_mode->clock, &m_n); 1028 1029 { 1030 REG_WRITE(PIPE_GMCH_DATA_M(pipe), 1031 ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | 1032 m_n.gmch_m); 1033 REG_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); 1034 REG_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); 1035 REG_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); 1036 } 1037} 1038 1039static void 1040cdv_intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, 1041 struct drm_display_mode *adjusted_mode) 1042{ 1043 struct gma_encoder *intel_encoder = to_gma_encoder(encoder); 1044 struct drm_crtc *crtc = encoder->crtc; 1045 struct gma_crtc *gma_crtc = to_gma_crtc(crtc); 1046 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 1047 struct drm_device *dev = encoder->dev; 1048 1049 intel_dp->DP = DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; 1050 intel_dp->DP |= intel_dp->color_range; 1051 1052 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 1053 intel_dp->DP |= DP_SYNC_HS_HIGH; 1054 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 1055 intel_dp->DP |= DP_SYNC_VS_HIGH; 1056 1057 intel_dp->DP |= DP_LINK_TRAIN_OFF; 1058 1059 switch (intel_dp->lane_count) { 1060 case 1: 1061 intel_dp->DP |= DP_PORT_WIDTH_1; 1062 break; 1063 case 2: 1064 intel_dp->DP |= DP_PORT_WIDTH_2; 1065 break; 1066 case 4: 1067 intel_dp->DP |= DP_PORT_WIDTH_4; 1068 break; 1069 } 1070 if (intel_dp->has_audio) 1071 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; 1072 1073 memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); 1074 intel_dp->link_configuration[0] = intel_dp->link_bw; 1075 intel_dp->link_configuration[1] = intel_dp->lane_count; 1076 1077 /* 1078 * Check for DPCD version > 1.1 and enhanced framing support 1079 */ 1080 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && 1081 (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { 1082 intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; 1083 intel_dp->DP |= DP_ENHANCED_FRAMING; 1084 } 1085 1086 /* CPT DP's pipe select is decided in TRANS_DP_CTL */ 1087 if (gma_crtc->pipe == 1) 1088 intel_dp->DP |= DP_PIPEB_SELECT; 1089 1090 REG_WRITE(intel_dp->output_reg, (intel_dp->DP | DP_PORT_EN)); 1091 DRM_DEBUG_KMS("DP expected reg is %x\n", intel_dp->DP); 1092 if (is_edp(intel_encoder)) { 1093 uint32_t pfit_control; 1094 cdv_intel_edp_panel_on(intel_encoder); 1095 1096 if (mode->hdisplay != adjusted_mode->hdisplay || 1097 mode->vdisplay != adjusted_mode->vdisplay) 1098 pfit_control = PFIT_ENABLE; 1099 else 1100 pfit_control = 0; 1101 1102 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT; 1103 1104 REG_WRITE(PFIT_CONTROL, pfit_control); 1105 } 1106} 1107 1108 1109/* If the sink supports it, try to set the power state appropriately */ 1110static void cdv_intel_dp_sink_dpms(struct gma_encoder *encoder, int mode) 1111{ 1112 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1113 int ret, i; 1114 1115 /* Should have a valid DPCD by this point */ 1116 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) 1117 return; 1118 1119 if (mode != DRM_MODE_DPMS_ON) { 1120 ret = cdv_intel_dp_aux_native_write_1(encoder, DP_SET_POWER, 1121 DP_SET_POWER_D3); 1122 if (ret != 1) 1123 DRM_DEBUG_DRIVER("failed to write sink power state\n"); 1124 } else { 1125 /* 1126 * When turning on, we need to retry for 1ms to give the sink 1127 * time to wake up. 1128 */ 1129 for (i = 0; i < 3; i++) { 1130 ret = cdv_intel_dp_aux_native_write_1(encoder, 1131 DP_SET_POWER, 1132 DP_SET_POWER_D0); 1133 if (ret == 1) 1134 break; 1135 udelay(1000); 1136 } 1137 } 1138} 1139 1140static void cdv_intel_dp_prepare(struct drm_encoder *encoder) 1141{ 1142 struct gma_encoder *intel_encoder = to_gma_encoder(encoder); 1143 int edp = is_edp(intel_encoder); 1144 1145 if (edp) { 1146 cdv_intel_edp_backlight_off(intel_encoder); 1147 cdv_intel_edp_panel_off(intel_encoder); 1148 cdv_intel_edp_panel_vdd_on(intel_encoder); 1149 } 1150 /* Wake up the sink first */ 1151 cdv_intel_dp_sink_dpms(intel_encoder, DRM_MODE_DPMS_ON); 1152 cdv_intel_dp_link_down(intel_encoder); 1153 if (edp) 1154 cdv_intel_edp_panel_vdd_off(intel_encoder); 1155} 1156 1157static void cdv_intel_dp_commit(struct drm_encoder *encoder) 1158{ 1159 struct gma_encoder *intel_encoder = to_gma_encoder(encoder); 1160 int edp = is_edp(intel_encoder); 1161 1162 if (edp) 1163 cdv_intel_edp_panel_on(intel_encoder); 1164 cdv_intel_dp_start_link_train(intel_encoder); 1165 cdv_intel_dp_complete_link_train(intel_encoder); 1166 if (edp) 1167 cdv_intel_edp_backlight_on(intel_encoder); 1168} 1169 1170static void 1171cdv_intel_dp_dpms(struct drm_encoder *encoder, int mode) 1172{ 1173 struct gma_encoder *intel_encoder = to_gma_encoder(encoder); 1174 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 1175 struct drm_device *dev = encoder->dev; 1176 uint32_t dp_reg = REG_READ(intel_dp->output_reg); 1177 int edp = is_edp(intel_encoder); 1178 1179 if (mode != DRM_MODE_DPMS_ON) { 1180 if (edp) { 1181 cdv_intel_edp_backlight_off(intel_encoder); 1182 cdv_intel_edp_panel_vdd_on(intel_encoder); 1183 } 1184 cdv_intel_dp_sink_dpms(intel_encoder, mode); 1185 cdv_intel_dp_link_down(intel_encoder); 1186 if (edp) { 1187 cdv_intel_edp_panel_vdd_off(intel_encoder); 1188 cdv_intel_edp_panel_off(intel_encoder); 1189 } 1190 } else { 1191 if (edp) 1192 cdv_intel_edp_panel_on(intel_encoder); 1193 cdv_intel_dp_sink_dpms(intel_encoder, mode); 1194 if (!(dp_reg & DP_PORT_EN)) { 1195 cdv_intel_dp_start_link_train(intel_encoder); 1196 cdv_intel_dp_complete_link_train(intel_encoder); 1197 } 1198 if (edp) 1199 cdv_intel_edp_backlight_on(intel_encoder); 1200 } 1201} 1202 1203/* 1204 * Native read with retry for link status and receiver capability reads for 1205 * cases where the sink may still be asleep. 1206 */ 1207static bool 1208cdv_intel_dp_aux_native_read_retry(struct gma_encoder *encoder, uint16_t address, 1209 uint8_t *recv, int recv_bytes) 1210{ 1211 int ret, i; 1212 1213 /* 1214 * Sinks are *supposed* to come up within 1ms from an off state, 1215 * but we're also supposed to retry 3 times per the spec. 1216 */ 1217 for (i = 0; i < 3; i++) { 1218 ret = cdv_intel_dp_aux_native_read(encoder, address, recv, 1219 recv_bytes); 1220 if (ret == recv_bytes) 1221 return true; 1222 udelay(1000); 1223 } 1224 1225 return false; 1226} 1227 1228/* 1229 * Fetch AUX CH registers 0x202 - 0x207 which contain 1230 * link status information 1231 */ 1232static bool 1233cdv_intel_dp_get_link_status(struct gma_encoder *encoder) 1234{ 1235 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1236 return cdv_intel_dp_aux_native_read_retry(encoder, 1237 DP_LANE0_1_STATUS, 1238 intel_dp->link_status, 1239 DP_LINK_STATUS_SIZE); 1240} 1241 1242static uint8_t 1243cdv_intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], 1244 int r) 1245{ 1246 return link_status[r - DP_LANE0_1_STATUS]; 1247} 1248 1249static uint8_t 1250cdv_intel_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE], 1251 int lane) 1252{ 1253 int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); 1254 int s = ((lane & 1) ? 1255 DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 1256 DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); 1257 uint8_t l = cdv_intel_dp_link_status(link_status, i); 1258 1259 return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; 1260} 1261 1262static uint8_t 1263cdv_intel_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE], 1264 int lane) 1265{ 1266 int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); 1267 int s = ((lane & 1) ? 1268 DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : 1269 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); 1270 uint8_t l = cdv_intel_dp_link_status(link_status, i); 1271 1272 return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; 1273} 1274 1275#define CDV_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_LEVEL_3 1276 1277static void 1278cdv_intel_get_adjust_train(struct gma_encoder *encoder) 1279{ 1280 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1281 uint8_t v = 0; 1282 uint8_t p = 0; 1283 int lane; 1284 1285 for (lane = 0; lane < intel_dp->lane_count; lane++) { 1286 uint8_t this_v = cdv_intel_get_adjust_request_voltage(intel_dp->link_status, lane); 1287 uint8_t this_p = cdv_intel_get_adjust_request_pre_emphasis(intel_dp->link_status, lane); 1288 1289 if (this_v > v) 1290 v = this_v; 1291 if (this_p > p) 1292 p = this_p; 1293 } 1294 1295 if (v >= CDV_DP_VOLTAGE_MAX) 1296 v = CDV_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED; 1297 1298 if (p == DP_TRAIN_PRE_EMPHASIS_MASK) 1299 p |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; 1300 1301 for (lane = 0; lane < 4; lane++) 1302 intel_dp->train_set[lane] = v | p; 1303} 1304 1305 1306static uint8_t 1307cdv_intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], 1308 int lane) 1309{ 1310 int i = DP_LANE0_1_STATUS + (lane >> 1); 1311 int s = (lane & 1) * 4; 1312 uint8_t l = cdv_intel_dp_link_status(link_status, i); 1313 1314 return (l >> s) & 0xf; 1315} 1316 1317/* Check for clock recovery is done on all channels */ 1318static bool 1319cdv_intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) 1320{ 1321 int lane; 1322 uint8_t lane_status; 1323 1324 for (lane = 0; lane < lane_count; lane++) { 1325 lane_status = cdv_intel_get_lane_status(link_status, lane); 1326 if ((lane_status & DP_LANE_CR_DONE) == 0) 1327 return false; 1328 } 1329 return true; 1330} 1331 1332/* Check to see if channel eq is done on all channels */ 1333#define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ 1334 DP_LANE_CHANNEL_EQ_DONE|\ 1335 DP_LANE_SYMBOL_LOCKED) 1336static bool 1337cdv_intel_channel_eq_ok(struct gma_encoder *encoder) 1338{ 1339 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1340 uint8_t lane_align; 1341 uint8_t lane_status; 1342 int lane; 1343 1344 lane_align = cdv_intel_dp_link_status(intel_dp->link_status, 1345 DP_LANE_ALIGN_STATUS_UPDATED); 1346 if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) 1347 return false; 1348 for (lane = 0; lane < intel_dp->lane_count; lane++) { 1349 lane_status = cdv_intel_get_lane_status(intel_dp->link_status, lane); 1350 if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) 1351 return false; 1352 } 1353 return true; 1354} 1355 1356static bool 1357cdv_intel_dp_set_link_train(struct gma_encoder *encoder, 1358 uint32_t dp_reg_value, 1359 uint8_t dp_train_pat) 1360{ 1361 1362 struct drm_device *dev = encoder->base.dev; 1363 int ret; 1364 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1365 1366 REG_WRITE(intel_dp->output_reg, dp_reg_value); 1367 REG_READ(intel_dp->output_reg); 1368 1369 ret = cdv_intel_dp_aux_native_write_1(encoder, 1370 DP_TRAINING_PATTERN_SET, 1371 dp_train_pat); 1372 1373 if (ret != 1) { 1374 DRM_DEBUG_KMS("Failure in setting link pattern %x\n", 1375 dp_train_pat); 1376 return false; 1377 } 1378 1379 return true; 1380} 1381 1382 1383static bool 1384cdv_intel_dplink_set_level(struct gma_encoder *encoder, 1385 uint8_t dp_train_pat) 1386{ 1387 1388 int ret; 1389 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1390 1391 ret = cdv_intel_dp_aux_native_write(encoder, 1392 DP_TRAINING_LANE0_SET, 1393 intel_dp->train_set, 1394 intel_dp->lane_count); 1395 1396 if (ret != intel_dp->lane_count) { 1397 DRM_DEBUG_KMS("Failure in setting level %d, lane_cnt= %d\n", 1398 intel_dp->train_set[0], intel_dp->lane_count); 1399 return false; 1400 } 1401 return true; 1402} 1403 1404static void 1405cdv_intel_dp_set_vswing_premph(struct gma_encoder *encoder, uint8_t signal_level) 1406{ 1407 struct drm_device *dev = encoder->base.dev; 1408 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1409 struct ddi_regoff *ddi_reg; 1410 int vswing, premph, index; 1411 1412 if (intel_dp->output_reg == DP_B) 1413 ddi_reg = &ddi_DP_train_table[0]; 1414 else 1415 ddi_reg = &ddi_DP_train_table[1]; 1416 1417 vswing = (signal_level & DP_TRAIN_VOLTAGE_SWING_MASK); 1418 premph = ((signal_level & DP_TRAIN_PRE_EMPHASIS_MASK)) >> 1419 DP_TRAIN_PRE_EMPHASIS_SHIFT; 1420 1421 if (vswing + premph > 3) 1422 return; 1423#ifdef CDV_FAST_LINK_TRAIN 1424 return; 1425#endif 1426 DRM_DEBUG_KMS("Test2\n"); 1427 //return ; 1428 cdv_sb_reset(dev); 1429 /* ;Swing voltage programming 1430 ;gfx_dpio_set_reg(0xc058, 0x0505313A) */ 1431 cdv_sb_write(dev, ddi_reg->VSwing5, 0x0505313A); 1432 1433 /* ;gfx_dpio_set_reg(0x8154, 0x43406055) */ 1434 cdv_sb_write(dev, ddi_reg->VSwing1, 0x43406055); 1435 1436 /* ;gfx_dpio_set_reg(0x8148, 0x55338954) 1437 * The VSwing_PreEmph table is also considered based on the vswing/premp 1438 */ 1439 index = (vswing + premph) * 2; 1440 if (premph == 1 && vswing == 1) { 1441 cdv_sb_write(dev, ddi_reg->VSwing2, 0x055738954); 1442 } else 1443 cdv_sb_write(dev, ddi_reg->VSwing2, dp_vswing_premph_table[index]); 1444 1445 /* ;gfx_dpio_set_reg(0x814c, 0x40802040) */ 1446 if ((vswing + premph) == DP_TRAIN_VOLTAGE_SWING_LEVEL_3) 1447 cdv_sb_write(dev, ddi_reg->VSwing3, 0x70802040); 1448 else 1449 cdv_sb_write(dev, ddi_reg->VSwing3, 0x40802040); 1450 1451 /* ;gfx_dpio_set_reg(0x8150, 0x2b405555) */ 1452 /* cdv_sb_write(dev, ddi_reg->VSwing4, 0x2b405555); */ 1453 1454 /* ;gfx_dpio_set_reg(0x8154, 0xc3406055) */ 1455 cdv_sb_write(dev, ddi_reg->VSwing1, 0xc3406055); 1456 1457 /* ;Pre emphasis programming 1458 * ;gfx_dpio_set_reg(0xc02c, 0x1f030040) 1459 */ 1460 cdv_sb_write(dev, ddi_reg->PreEmph1, 0x1f030040); 1461 1462 /* ;gfx_dpio_set_reg(0x8124, 0x00004000) */ 1463 index = 2 * premph + 1; 1464 cdv_sb_write(dev, ddi_reg->PreEmph2, dp_vswing_premph_table[index]); 1465 return; 1466} 1467 1468 1469/* Enable corresponding port and start training pattern 1 */ 1470static void 1471cdv_intel_dp_start_link_train(struct gma_encoder *encoder) 1472{ 1473 struct drm_device *dev = encoder->base.dev; 1474 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1475 int i; 1476 uint8_t voltage; 1477 bool clock_recovery = false; 1478 int tries; 1479 u32 reg; 1480 uint32_t DP = intel_dp->DP; 1481 1482 DP |= DP_PORT_EN; 1483 DP &= ~DP_LINK_TRAIN_MASK; 1484 1485 reg = DP; 1486 reg |= DP_LINK_TRAIN_PAT_1; 1487 /* Enable output, wait for it to become active */ 1488 REG_WRITE(intel_dp->output_reg, reg); 1489 REG_READ(intel_dp->output_reg); 1490 gma_wait_for_vblank(dev); 1491 1492 DRM_DEBUG_KMS("Link config\n"); 1493 /* Write the link configuration data */ 1494 cdv_intel_dp_aux_native_write(encoder, DP_LINK_BW_SET, 1495 intel_dp->link_configuration, 1496 2); 1497 1498 memset(intel_dp->train_set, 0, 4); 1499 voltage = 0; 1500 tries = 0; 1501 clock_recovery = false; 1502 1503 DRM_DEBUG_KMS("Start train\n"); 1504 reg = DP | DP_LINK_TRAIN_PAT_1; 1505 1506 1507 for (;;) { 1508 /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ 1509 DRM_DEBUG_KMS("DP Link Train Set %x, Link_config %x, %x\n", 1510 intel_dp->train_set[0], 1511 intel_dp->link_configuration[0], 1512 intel_dp->link_configuration[1]); 1513 1514 if (!cdv_intel_dp_set_link_train(encoder, reg, DP_TRAINING_PATTERN_1)) { 1515 DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 1\n"); 1516 } 1517 cdv_intel_dp_set_vswing_premph(encoder, intel_dp->train_set[0]); 1518 /* Set training pattern 1 */ 1519 1520 cdv_intel_dplink_set_level(encoder, DP_TRAINING_PATTERN_1); 1521 1522 udelay(200); 1523 if (!cdv_intel_dp_get_link_status(encoder)) 1524 break; 1525 1526 DRM_DEBUG_KMS("DP Link status %x, %x, %x, %x, %x, %x\n", 1527 intel_dp->link_status[0], intel_dp->link_status[1], intel_dp->link_status[2], 1528 intel_dp->link_status[3], intel_dp->link_status[4], intel_dp->link_status[5]); 1529 1530 if (cdv_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) { 1531 DRM_DEBUG_KMS("PT1 train is done\n"); 1532 clock_recovery = true; 1533 break; 1534 } 1535 1536 /* Check to see if we've tried the max voltage */ 1537 for (i = 0; i < intel_dp->lane_count; i++) 1538 if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) 1539 break; 1540 if (i == intel_dp->lane_count) 1541 break; 1542 1543 /* Check to see if we've tried the same voltage 5 times */ 1544 if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { 1545 ++tries; 1546 if (tries == 5) 1547 break; 1548 } else 1549 tries = 0; 1550 voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; 1551 1552 /* Compute new intel_dp->train_set as requested by target */ 1553 cdv_intel_get_adjust_train(encoder); 1554 1555 } 1556 1557 if (!clock_recovery) { 1558 DRM_DEBUG_KMS("failure in DP patter 1 training, train set %x\n", intel_dp->train_set[0]); 1559 } 1560 1561 intel_dp->DP = DP; 1562} 1563 1564static void 1565cdv_intel_dp_complete_link_train(struct gma_encoder *encoder) 1566{ 1567 struct drm_device *dev = encoder->base.dev; 1568 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1569 int tries, cr_tries; 1570 u32 reg; 1571 uint32_t DP = intel_dp->DP; 1572 1573 /* channel equalization */ 1574 tries = 0; 1575 cr_tries = 0; 1576 1577 DRM_DEBUG_KMS("\n"); 1578 reg = DP | DP_LINK_TRAIN_PAT_2; 1579 1580 for (;;) { 1581 1582 DRM_DEBUG_KMS("DP Link Train Set %x, Link_config %x, %x\n", 1583 intel_dp->train_set[0], 1584 intel_dp->link_configuration[0], 1585 intel_dp->link_configuration[1]); 1586 /* channel eq pattern */ 1587 1588 if (!cdv_intel_dp_set_link_train(encoder, reg, 1589 DP_TRAINING_PATTERN_2)) { 1590 DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 2\n"); 1591 } 1592 /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ 1593 1594 if (cr_tries > 5) { 1595 DRM_ERROR("failed to train DP, aborting\n"); 1596 cdv_intel_dp_link_down(encoder); 1597 break; 1598 } 1599 1600 cdv_intel_dp_set_vswing_premph(encoder, intel_dp->train_set[0]); 1601 1602 cdv_intel_dplink_set_level(encoder, DP_TRAINING_PATTERN_2); 1603 1604 udelay(1000); 1605 if (!cdv_intel_dp_get_link_status(encoder)) 1606 break; 1607 1608 DRM_DEBUG_KMS("DP Link status %x, %x, %x, %x, %x, %x\n", 1609 intel_dp->link_status[0], intel_dp->link_status[1], intel_dp->link_status[2], 1610 intel_dp->link_status[3], intel_dp->link_status[4], intel_dp->link_status[5]); 1611 1612 /* Make sure clock is still ok */ 1613 if (!cdv_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) { 1614 cdv_intel_dp_start_link_train(encoder); 1615 cr_tries++; 1616 continue; 1617 } 1618 1619 if (cdv_intel_channel_eq_ok(encoder)) { 1620 DRM_DEBUG_KMS("PT2 train is done\n"); 1621 break; 1622 } 1623 1624 /* Try 5 times, then try clock recovery if that fails */ 1625 if (tries > 5) { 1626 cdv_intel_dp_link_down(encoder); 1627 cdv_intel_dp_start_link_train(encoder); 1628 tries = 0; 1629 cr_tries++; 1630 continue; 1631 } 1632 1633 /* Compute new intel_dp->train_set as requested by target */ 1634 cdv_intel_get_adjust_train(encoder); 1635 ++tries; 1636 1637 } 1638 1639 reg = DP | DP_LINK_TRAIN_OFF; 1640 1641 REG_WRITE(intel_dp->output_reg, reg); 1642 REG_READ(intel_dp->output_reg); 1643 cdv_intel_dp_aux_native_write_1(encoder, 1644 DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); 1645} 1646 1647static void 1648cdv_intel_dp_link_down(struct gma_encoder *encoder) 1649{ 1650 struct drm_device *dev = encoder->base.dev; 1651 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1652 uint32_t DP = intel_dp->DP; 1653 1654 if ((REG_READ(intel_dp->output_reg) & DP_PORT_EN) == 0) 1655 return; 1656 1657 DRM_DEBUG_KMS("\n"); 1658 1659 1660 { 1661 DP &= ~DP_LINK_TRAIN_MASK; 1662 REG_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); 1663 } 1664 REG_READ(intel_dp->output_reg); 1665 1666 msleep(17); 1667 1668 REG_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); 1669 REG_READ(intel_dp->output_reg); 1670} 1671 1672static enum drm_connector_status cdv_dp_detect(struct gma_encoder *encoder) 1673{ 1674 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1675 enum drm_connector_status status; 1676 1677 status = connector_status_disconnected; 1678 if (cdv_intel_dp_aux_native_read(encoder, 0x000, intel_dp->dpcd, 1679 sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd)) 1680 { 1681 if (intel_dp->dpcd[DP_DPCD_REV] != 0) 1682 status = connector_status_connected; 1683 } 1684 if (status == connector_status_connected) 1685 DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n", 1686 intel_dp->dpcd[0], intel_dp->dpcd[1], 1687 intel_dp->dpcd[2], intel_dp->dpcd[3]); 1688 return status; 1689} 1690 1691/** 1692 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. 1693 * 1694 * \return true if DP port is connected. 1695 * \return false if DP port is disconnected. 1696 */ 1697static enum drm_connector_status 1698cdv_intel_dp_detect(struct drm_connector *connector, bool force) 1699{ 1700 struct gma_encoder *encoder = gma_attached_encoder(connector); 1701 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1702 enum drm_connector_status status; 1703 struct edid *edid = NULL; 1704 int edp = is_edp(encoder); 1705 1706 intel_dp->has_audio = false; 1707 1708 if (edp) 1709 cdv_intel_edp_panel_vdd_on(encoder); 1710 status = cdv_dp_detect(encoder); 1711 if (status != connector_status_connected) { 1712 if (edp) 1713 cdv_intel_edp_panel_vdd_off(encoder); 1714 return status; 1715 } 1716 1717 if (intel_dp->force_audio) { 1718 intel_dp->has_audio = intel_dp->force_audio > 0; 1719 } else { 1720 edid = drm_get_edid(connector, &intel_dp->adapter); 1721 if (edid) { 1722 intel_dp->has_audio = drm_detect_monitor_audio(edid); 1723 kfree(edid); 1724 } 1725 } 1726 if (edp) 1727 cdv_intel_edp_panel_vdd_off(encoder); 1728 1729 return connector_status_connected; 1730} 1731 1732static int cdv_intel_dp_get_modes(struct drm_connector *connector) 1733{ 1734 struct gma_encoder *intel_encoder = gma_attached_encoder(connector); 1735 struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv; 1736 struct edid *edid = NULL; 1737 int ret = 0; 1738 int edp = is_edp(intel_encoder); 1739 1740 1741 edid = drm_get_edid(connector, &intel_dp->adapter); 1742 if (edid) { 1743 drm_connector_update_edid_property(connector, edid); 1744 ret = drm_add_edid_modes(connector, edid); 1745 kfree(edid); 1746 } 1747 1748 if (is_edp(intel_encoder)) { 1749 struct drm_device *dev = connector->dev; 1750 struct drm_psb_private *dev_priv = dev->dev_private; 1751 1752 cdv_intel_edp_panel_vdd_off(intel_encoder); 1753 if (ret) { 1754 if (edp && !intel_dp->panel_fixed_mode) { 1755 struct drm_display_mode *newmode; 1756 list_for_each_entry(newmode, &connector->probed_modes, 1757 head) { 1758 if (newmode->type & DRM_MODE_TYPE_PREFERRED) { 1759 intel_dp->panel_fixed_mode = 1760 drm_mode_duplicate(dev, newmode); 1761 break; 1762 } 1763 } 1764 } 1765 1766 return ret; 1767 } 1768 if (!intel_dp->panel_fixed_mode && dev_priv->lfp_lvds_vbt_mode) { 1769 intel_dp->panel_fixed_mode = 1770 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 1771 if (intel_dp->panel_fixed_mode) { 1772 intel_dp->panel_fixed_mode->type |= 1773 DRM_MODE_TYPE_PREFERRED; 1774 } 1775 } 1776 if (intel_dp->panel_fixed_mode != NULL) { 1777 struct drm_display_mode *mode; 1778 mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode); 1779 drm_mode_probed_add(connector, mode); 1780 return 1; 1781 } 1782 } 1783 1784 return ret; 1785} 1786 1787static bool 1788cdv_intel_dp_detect_audio(struct drm_connector *connector) 1789{ 1790 struct gma_encoder *encoder = gma_attached_encoder(connector); 1791 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1792 struct edid *edid; 1793 bool has_audio = false; 1794 int edp = is_edp(encoder); 1795 1796 if (edp) 1797 cdv_intel_edp_panel_vdd_on(encoder); 1798 1799 edid = drm_get_edid(connector, &intel_dp->adapter); 1800 if (edid) { 1801 has_audio = drm_detect_monitor_audio(edid); 1802 kfree(edid); 1803 } 1804 if (edp) 1805 cdv_intel_edp_panel_vdd_off(encoder); 1806 1807 return has_audio; 1808} 1809 1810static int 1811cdv_intel_dp_set_property(struct drm_connector *connector, 1812 struct drm_property *property, 1813 uint64_t val) 1814{ 1815 struct drm_psb_private *dev_priv = connector->dev->dev_private; 1816 struct gma_encoder *encoder = gma_attached_encoder(connector); 1817 struct cdv_intel_dp *intel_dp = encoder->dev_priv; 1818 int ret; 1819 1820 ret = drm_object_property_set_value(&connector->base, property, val); 1821 if (ret) 1822 return ret; 1823 1824 if (property == dev_priv->force_audio_property) { 1825 int i = val; 1826 bool has_audio; 1827 1828 if (i == intel_dp->force_audio) 1829 return 0; 1830 1831 intel_dp->force_audio = i; 1832 1833 if (i == 0) 1834 has_audio = cdv_intel_dp_detect_audio(connector); 1835 else 1836 has_audio = i > 0; 1837 1838 if (has_audio == intel_dp->has_audio) 1839 return 0; 1840 1841 intel_dp->has_audio = has_audio; 1842 goto done; 1843 } 1844 1845 if (property == dev_priv->broadcast_rgb_property) { 1846 if (val == !!intel_dp->color_range) 1847 return 0; 1848 1849 intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; 1850 goto done; 1851 } 1852 1853 return -EINVAL; 1854 1855done: 1856 if (encoder->base.crtc) { 1857 struct drm_crtc *crtc = encoder->base.crtc; 1858 drm_crtc_helper_set_mode(crtc, &crtc->mode, 1859 crtc->x, crtc->y, 1860 crtc->primary->fb); 1861 } 1862 1863 return 0; 1864} 1865 1866static void 1867cdv_intel_dp_destroy(struct drm_connector *connector) 1868{ 1869 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 1870 struct cdv_intel_dp *intel_dp = gma_encoder->dev_priv; 1871 1872 if (is_edp(gma_encoder)) { 1873 /* cdv_intel_panel_destroy_backlight(connector->dev); */ 1874 kfree(intel_dp->panel_fixed_mode); 1875 intel_dp->panel_fixed_mode = NULL; 1876 } 1877 i2c_del_adapter(&intel_dp->adapter); 1878 drm_connector_unregister(connector); 1879 drm_connector_cleanup(connector); 1880 kfree(connector); 1881} 1882 1883static const struct drm_encoder_helper_funcs cdv_intel_dp_helper_funcs = { 1884 .dpms = cdv_intel_dp_dpms, 1885 .mode_fixup = cdv_intel_dp_mode_fixup, 1886 .prepare = cdv_intel_dp_prepare, 1887 .mode_set = cdv_intel_dp_mode_set, 1888 .commit = cdv_intel_dp_commit, 1889}; 1890 1891static const struct drm_connector_funcs cdv_intel_dp_connector_funcs = { 1892 .dpms = drm_helper_connector_dpms, 1893 .detect = cdv_intel_dp_detect, 1894 .fill_modes = drm_helper_probe_single_connector_modes, 1895 .set_property = cdv_intel_dp_set_property, 1896 .destroy = cdv_intel_dp_destroy, 1897}; 1898 1899static const struct drm_connector_helper_funcs cdv_intel_dp_connector_helper_funcs = { 1900 .get_modes = cdv_intel_dp_get_modes, 1901 .mode_valid = cdv_intel_dp_mode_valid, 1902 .best_encoder = gma_best_encoder, 1903}; 1904 1905static void cdv_intel_dp_add_properties(struct drm_connector *connector) 1906{ 1907 cdv_intel_attach_force_audio_property(connector); 1908 cdv_intel_attach_broadcast_rgb_property(connector); 1909} 1910 1911/* check the VBT to see whether the eDP is on DP-D port */ 1912static bool cdv_intel_dpc_is_edp(struct drm_device *dev) 1913{ 1914 struct drm_psb_private *dev_priv = dev->dev_private; 1915 struct child_device_config *p_child; 1916 int i; 1917 1918 if (!dev_priv->child_dev_num) 1919 return false; 1920 1921 for (i = 0; i < dev_priv->child_dev_num; i++) { 1922 p_child = dev_priv->child_dev + i; 1923 1924 if (p_child->dvo_port == PORT_IDPC && 1925 p_child->device_type == DEVICE_TYPE_eDP) 1926 return true; 1927 } 1928 return false; 1929} 1930 1931/* Cedarview display clock gating 1932 1933 We need this disable dot get correct behaviour while enabling 1934 DP/eDP. TODO - investigate if we can turn it back to normality 1935 after enabling */ 1936static void cdv_disable_intel_clock_gating(struct drm_device *dev) 1937{ 1938 u32 reg_value; 1939 reg_value = REG_READ(DSPCLK_GATE_D); 1940 1941 reg_value |= (DPUNIT_PIPEB_GATE_DISABLE | 1942 DPUNIT_PIPEA_GATE_DISABLE | 1943 DPCUNIT_CLOCK_GATE_DISABLE | 1944 DPLSUNIT_CLOCK_GATE_DISABLE | 1945 DPOUNIT_CLOCK_GATE_DISABLE | 1946 DPIOUNIT_CLOCK_GATE_DISABLE); 1947 1948 REG_WRITE(DSPCLK_GATE_D, reg_value); 1949 1950 udelay(500); 1951} 1952 1953void 1954cdv_intel_dp_init(struct drm_device *dev, struct psb_intel_mode_device *mode_dev, int output_reg) 1955{ 1956 struct gma_encoder *gma_encoder; 1957 struct gma_connector *gma_connector; 1958 struct drm_connector *connector; 1959 struct drm_encoder *encoder; 1960 struct cdv_intel_dp *intel_dp; 1961 const char *name = NULL; 1962 int type = DRM_MODE_CONNECTOR_DisplayPort; 1963 1964 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 1965 if (!gma_encoder) 1966 return; 1967 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 1968 if (!gma_connector) 1969 goto err_connector; 1970 intel_dp = kzalloc(sizeof(struct cdv_intel_dp), GFP_KERNEL); 1971 if (!intel_dp) 1972 goto err_priv; 1973 1974 if ((output_reg == DP_C) && cdv_intel_dpc_is_edp(dev)) 1975 type = DRM_MODE_CONNECTOR_eDP; 1976 1977 connector = &gma_connector->base; 1978 encoder = &gma_encoder->base; 1979 1980 drm_connector_init(dev, connector, &cdv_intel_dp_connector_funcs, type); 1981 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS); 1982 1983 gma_connector_attach_encoder(gma_connector, gma_encoder); 1984 1985 if (type == DRM_MODE_CONNECTOR_DisplayPort) 1986 gma_encoder->type = INTEL_OUTPUT_DISPLAYPORT; 1987 else 1988 gma_encoder->type = INTEL_OUTPUT_EDP; 1989 1990 1991 gma_encoder->dev_priv=intel_dp; 1992 intel_dp->encoder = gma_encoder; 1993 intel_dp->output_reg = output_reg; 1994 1995 drm_encoder_helper_add(encoder, &cdv_intel_dp_helper_funcs); 1996 drm_connector_helper_add(connector, &cdv_intel_dp_connector_helper_funcs); 1997 1998 connector->polled = DRM_CONNECTOR_POLL_HPD; 1999 connector->interlace_allowed = false; 2000 connector->doublescan_allowed = false; 2001 2002 drm_connector_register(connector); 2003 2004 /* Set up the DDC bus. */ 2005 switch (output_reg) { 2006 case DP_B: 2007 name = "DPDDC-B"; 2008 gma_encoder->ddi_select = (DP_MASK | DDI0_SELECT); 2009 break; 2010 case DP_C: 2011 name = "DPDDC-C"; 2012 gma_encoder->ddi_select = (DP_MASK | DDI1_SELECT); 2013 break; 2014 } 2015 2016 cdv_disable_intel_clock_gating(dev); 2017 2018 cdv_intel_dp_i2c_init(gma_connector, gma_encoder, name); 2019 /* FIXME:fail check */ 2020 cdv_intel_dp_add_properties(connector); 2021 2022 if (is_edp(gma_encoder)) { 2023 int ret; 2024 struct edp_power_seq cur; 2025 u32 pp_on, pp_off, pp_div; 2026 u32 pwm_ctrl; 2027 2028 pp_on = REG_READ(PP_CONTROL); 2029 pp_on &= ~PANEL_UNLOCK_MASK; 2030 pp_on |= PANEL_UNLOCK_REGS; 2031 2032 REG_WRITE(PP_CONTROL, pp_on); 2033 2034 pwm_ctrl = REG_READ(BLC_PWM_CTL2); 2035 pwm_ctrl |= PWM_PIPE_B; 2036 REG_WRITE(BLC_PWM_CTL2, pwm_ctrl); 2037 2038 pp_on = REG_READ(PP_ON_DELAYS); 2039 pp_off = REG_READ(PP_OFF_DELAYS); 2040 pp_div = REG_READ(PP_DIVISOR); 2041 2042 /* Pull timing values out of registers */ 2043 cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> 2044 PANEL_POWER_UP_DELAY_SHIFT; 2045 2046 cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> 2047 PANEL_LIGHT_ON_DELAY_SHIFT; 2048 2049 cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> 2050 PANEL_LIGHT_OFF_DELAY_SHIFT; 2051 2052 cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> 2053 PANEL_POWER_DOWN_DELAY_SHIFT; 2054 2055 cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> 2056 PANEL_POWER_CYCLE_DELAY_SHIFT); 2057 2058 DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", 2059 cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); 2060 2061 2062 intel_dp->panel_power_up_delay = cur.t1_t3 / 10; 2063 intel_dp->backlight_on_delay = cur.t8 / 10; 2064 intel_dp->backlight_off_delay = cur.t9 / 10; 2065 intel_dp->panel_power_down_delay = cur.t10 / 10; 2066 intel_dp->panel_power_cycle_delay = (cur.t11_t12 - 1) * 100; 2067 2068 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", 2069 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, 2070 intel_dp->panel_power_cycle_delay); 2071 2072 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", 2073 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); 2074 2075 2076 cdv_intel_edp_panel_vdd_on(gma_encoder); 2077 ret = cdv_intel_dp_aux_native_read(gma_encoder, DP_DPCD_REV, 2078 intel_dp->dpcd, 2079 sizeof(intel_dp->dpcd)); 2080 cdv_intel_edp_panel_vdd_off(gma_encoder); 2081 if (ret <= 0) { 2082 /* if this fails, presume the device is a ghost */ 2083 DRM_INFO("failed to retrieve link info, disabling eDP\n"); 2084 drm_encoder_cleanup(encoder); 2085 cdv_intel_dp_destroy(connector); 2086 goto err_connector; 2087 } else { 2088 DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n", 2089 intel_dp->dpcd[0], intel_dp->dpcd[1], 2090 intel_dp->dpcd[2], intel_dp->dpcd[3]); 2091 2092 } 2093 /* The CDV reference driver moves pnale backlight setup into the displays that 2094 have a backlight: this is a good idea and one we should probably adopt, however 2095 we need to migrate all the drivers before we can do that */ 2096 /*cdv_intel_panel_setup_backlight(dev); */ 2097 } 2098 return; 2099 2100err_priv: 2101 kfree(gma_connector); 2102err_connector: 2103 kfree(gma_encoder); 2104} 2105