Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Samsung SoC DP (Display Port) interface driver. |
| 3 | * |
| 4 | * Copyright (C) 2012 Samsung Electronics Co., Ltd. |
| 5 | * Author: Jingoo Han <jg1.han@samsung.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your |
| 10 | * option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/clk.h> |
| 18 | #include <linux/io.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/delay.h> |
| 21 | |
| 22 | #include <video/exynos_dp.h> |
| 23 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 24 | #include "exynos_dp_core.h" |
| 25 | |
| 26 | static int exynos_dp_init_dp(struct exynos_dp_device *dp) |
| 27 | { |
| 28 | exynos_dp_reset(dp); |
| 29 | |
| 30 | /* SW defined function Normal operation */ |
| 31 | exynos_dp_enable_sw_function(dp); |
| 32 | |
| 33 | exynos_dp_config_interrupt(dp); |
| 34 | exynos_dp_init_analog_func(dp); |
| 35 | |
| 36 | exynos_dp_init_hpd(dp); |
| 37 | exynos_dp_init_aux(dp); |
| 38 | |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static int exynos_dp_detect_hpd(struct exynos_dp_device *dp) |
| 43 | { |
| 44 | int timeout_loop = 0; |
| 45 | |
| 46 | exynos_dp_init_hpd(dp); |
| 47 | |
| 48 | udelay(200); |
| 49 | |
| 50 | while (exynos_dp_get_plug_in_status(dp) != 0) { |
| 51 | timeout_loop++; |
| 52 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 53 | dev_err(dp->dev, "failed to get hpd plug status\n"); |
| 54 | return -ETIMEDOUT; |
| 55 | } |
| 56 | udelay(10); |
| 57 | } |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static unsigned char exynos_dp_calc_edid_check_sum(unsigned char *edid_data) |
| 63 | { |
| 64 | int i; |
| 65 | unsigned char sum = 0; |
| 66 | |
| 67 | for (i = 0; i < EDID_BLOCK_LENGTH; i++) |
| 68 | sum = sum + edid_data[i]; |
| 69 | |
| 70 | return sum; |
| 71 | } |
| 72 | |
| 73 | static int exynos_dp_read_edid(struct exynos_dp_device *dp) |
| 74 | { |
| 75 | unsigned char edid[EDID_BLOCK_LENGTH * 2]; |
| 76 | unsigned int extend_block = 0; |
| 77 | unsigned char sum; |
| 78 | unsigned char test_vector; |
| 79 | int retval; |
| 80 | |
| 81 | /* |
| 82 | * EDID device address is 0x50. |
| 83 | * However, if necessary, you must have set upper address |
| 84 | * into E-EDID in I2C device, 0x30. |
| 85 | */ |
| 86 | |
| 87 | /* Read Extension Flag, Number of 128-byte EDID extension blocks */ |
| 88 | exynos_dp_read_byte_from_i2c(dp, I2C_EDID_DEVICE_ADDR, |
| 89 | EDID_EXTENSION_FLAG, |
| 90 | &extend_block); |
| 91 | |
| 92 | if (extend_block > 0) { |
| 93 | dev_dbg(dp->dev, "EDID data includes a single extension!\n"); |
| 94 | |
| 95 | /* Read EDID data */ |
| 96 | retval = exynos_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, |
| 97 | EDID_HEADER_PATTERN, |
| 98 | EDID_BLOCK_LENGTH, |
| 99 | &edid[EDID_HEADER_PATTERN]); |
| 100 | if (retval != 0) { |
| 101 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 102 | return -EIO; |
| 103 | } |
| 104 | sum = exynos_dp_calc_edid_check_sum(edid); |
| 105 | if (sum != 0) { |
| 106 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 107 | return -EIO; |
| 108 | } |
| 109 | |
| 110 | /* Read additional EDID data */ |
| 111 | retval = exynos_dp_read_bytes_from_i2c(dp, |
| 112 | I2C_EDID_DEVICE_ADDR, |
| 113 | EDID_BLOCK_LENGTH, |
| 114 | EDID_BLOCK_LENGTH, |
| 115 | &edid[EDID_BLOCK_LENGTH]); |
| 116 | if (retval != 0) { |
| 117 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 118 | return -EIO; |
| 119 | } |
| 120 | sum = exynos_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH]); |
| 121 | if (sum != 0) { |
| 122 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 123 | return -EIO; |
| 124 | } |
| 125 | |
| 126 | exynos_dp_read_byte_from_dpcd(dp, DPCD_ADDR_TEST_REQUEST, |
| 127 | &test_vector); |
| 128 | if (test_vector & DPCD_TEST_EDID_READ) { |
| 129 | exynos_dp_write_byte_to_dpcd(dp, |
| 130 | DPCD_ADDR_TEST_EDID_CHECKSUM, |
| 131 | edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]); |
| 132 | exynos_dp_write_byte_to_dpcd(dp, |
| 133 | DPCD_ADDR_TEST_RESPONSE, |
| 134 | DPCD_TEST_EDID_CHECKSUM_WRITE); |
| 135 | } |
| 136 | } else { |
| 137 | dev_info(dp->dev, "EDID data does not include any extensions.\n"); |
| 138 | |
| 139 | /* Read EDID data */ |
| 140 | retval = exynos_dp_read_bytes_from_i2c(dp, |
| 141 | I2C_EDID_DEVICE_ADDR, |
| 142 | EDID_HEADER_PATTERN, |
| 143 | EDID_BLOCK_LENGTH, |
| 144 | &edid[EDID_HEADER_PATTERN]); |
| 145 | if (retval != 0) { |
| 146 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 147 | return -EIO; |
| 148 | } |
| 149 | sum = exynos_dp_calc_edid_check_sum(edid); |
| 150 | if (sum != 0) { |
| 151 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 152 | return -EIO; |
| 153 | } |
| 154 | |
| 155 | exynos_dp_read_byte_from_dpcd(dp, |
| 156 | DPCD_ADDR_TEST_REQUEST, |
| 157 | &test_vector); |
| 158 | if (test_vector & DPCD_TEST_EDID_READ) { |
| 159 | exynos_dp_write_byte_to_dpcd(dp, |
| 160 | DPCD_ADDR_TEST_EDID_CHECKSUM, |
| 161 | edid[EDID_CHECKSUM]); |
| 162 | exynos_dp_write_byte_to_dpcd(dp, |
| 163 | DPCD_ADDR_TEST_RESPONSE, |
| 164 | DPCD_TEST_EDID_CHECKSUM_WRITE); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | dev_err(dp->dev, "EDID Read success!\n"); |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static int exynos_dp_handle_edid(struct exynos_dp_device *dp) |
| 173 | { |
| 174 | u8 buf[12]; |
| 175 | int i; |
| 176 | int retval; |
| 177 | |
| 178 | /* Read DPCD DPCD_ADDR_DPCD_REV~RECEIVE_PORT1_CAP_1 */ |
| 179 | exynos_dp_read_bytes_from_dpcd(dp, |
| 180 | DPCD_ADDR_DPCD_REV, |
| 181 | 12, buf); |
| 182 | |
| 183 | /* Read EDID */ |
| 184 | for (i = 0; i < 3; i++) { |
| 185 | retval = exynos_dp_read_edid(dp); |
| 186 | if (retval == 0) |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | return retval; |
| 191 | } |
| 192 | |
| 193 | static void exynos_dp_enable_rx_to_enhanced_mode(struct exynos_dp_device *dp, |
| 194 | bool enable) |
| 195 | { |
| 196 | u8 data; |
| 197 | |
| 198 | exynos_dp_read_byte_from_dpcd(dp, DPCD_ADDR_LANE_COUNT_SET, &data); |
| 199 | |
| 200 | if (enable) |
| 201 | exynos_dp_write_byte_to_dpcd(dp, DPCD_ADDR_LANE_COUNT_SET, |
| 202 | DPCD_ENHANCED_FRAME_EN | |
| 203 | DPCD_LANE_COUNT_SET(data)); |
| 204 | else |
| 205 | exynos_dp_write_byte_to_dpcd(dp, DPCD_ADDR_LANE_COUNT_SET, |
| 206 | DPCD_LANE_COUNT_SET(data)); |
| 207 | } |
| 208 | |
| 209 | static int exynos_dp_is_enhanced_mode_available(struct exynos_dp_device *dp) |
| 210 | { |
| 211 | u8 data; |
| 212 | int retval; |
| 213 | |
| 214 | exynos_dp_read_byte_from_dpcd(dp, DPCD_ADDR_MAX_LANE_COUNT, &data); |
| 215 | retval = DPCD_ENHANCED_FRAME_CAP(data); |
| 216 | |
| 217 | return retval; |
| 218 | } |
| 219 | |
| 220 | static void exynos_dp_set_enhanced_mode(struct exynos_dp_device *dp) |
| 221 | { |
| 222 | u8 data; |
| 223 | |
| 224 | data = exynos_dp_is_enhanced_mode_available(dp); |
| 225 | exynos_dp_enable_rx_to_enhanced_mode(dp, data); |
| 226 | exynos_dp_enable_enhanced_mode(dp, data); |
| 227 | } |
| 228 | |
| 229 | static void exynos_dp_training_pattern_dis(struct exynos_dp_device *dp) |
| 230 | { |
| 231 | exynos_dp_set_training_pattern(dp, DP_NONE); |
| 232 | |
| 233 | exynos_dp_write_byte_to_dpcd(dp, |
| 234 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 235 | DPCD_TRAINING_PATTERN_DISABLED); |
| 236 | } |
| 237 | |
| 238 | static void exynos_dp_set_lane_lane_pre_emphasis(struct exynos_dp_device *dp, |
| 239 | int pre_emphasis, int lane) |
| 240 | { |
| 241 | switch (lane) { |
| 242 | case 0: |
| 243 | exynos_dp_set_lane0_pre_emphasis(dp, pre_emphasis); |
| 244 | break; |
| 245 | case 1: |
| 246 | exynos_dp_set_lane1_pre_emphasis(dp, pre_emphasis); |
| 247 | break; |
| 248 | |
| 249 | case 2: |
| 250 | exynos_dp_set_lane2_pre_emphasis(dp, pre_emphasis); |
| 251 | break; |
| 252 | |
| 253 | case 3: |
| 254 | exynos_dp_set_lane3_pre_emphasis(dp, pre_emphasis); |
| 255 | break; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | static void exynos_dp_link_start(struct exynos_dp_device *dp) |
| 260 | { |
| 261 | u8 buf[5]; |
| 262 | int lane; |
| 263 | int lane_count; |
| 264 | |
| 265 | lane_count = dp->link_train.lane_count; |
| 266 | |
| 267 | dp->link_train.lt_state = CLOCK_RECOVERY; |
| 268 | dp->link_train.eq_loop = 0; |
| 269 | |
| 270 | for (lane = 0; lane < lane_count; lane++) |
| 271 | dp->link_train.cr_loop[lane] = 0; |
| 272 | |
| 273 | /* Set sink to D0 (Sink Not Ready) mode. */ |
| 274 | exynos_dp_write_byte_to_dpcd(dp, DPCD_ADDR_SINK_POWER_STATE, |
| 275 | DPCD_SET_POWER_STATE_D0); |
| 276 | |
| 277 | /* Set link rate and count as you want to establish*/ |
| 278 | exynos_dp_set_link_bandwidth(dp, dp->link_train.link_rate); |
| 279 | exynos_dp_set_lane_count(dp, dp->link_train.lane_count); |
| 280 | |
| 281 | /* Setup RX configuration */ |
| 282 | buf[0] = dp->link_train.link_rate; |
| 283 | buf[1] = dp->link_train.lane_count; |
| 284 | exynos_dp_write_bytes_to_dpcd(dp, DPCD_ADDR_LINK_BW_SET, |
| 285 | 2, buf); |
| 286 | |
| 287 | /* Set TX pre-emphasis to minimum */ |
| 288 | for (lane = 0; lane < lane_count; lane++) |
| 289 | exynos_dp_set_lane_lane_pre_emphasis(dp, |
| 290 | PRE_EMPHASIS_LEVEL_0, lane); |
| 291 | |
| 292 | /* Set training pattern 1 */ |
| 293 | exynos_dp_set_training_pattern(dp, TRAINING_PTN1); |
| 294 | |
| 295 | /* Set RX training pattern */ |
| 296 | buf[0] = DPCD_SCRAMBLING_DISABLED | |
| 297 | DPCD_TRAINING_PATTERN_1; |
| 298 | exynos_dp_write_byte_to_dpcd(dp, |
| 299 | DPCD_ADDR_TRAINING_PATTERN_SET, buf[0]); |
| 300 | |
| 301 | for (lane = 0; lane < lane_count; lane++) |
| 302 | buf[lane] = DPCD_PRE_EMPHASIS_PATTERN2_LEVEL0 | |
| 303 | DPCD_VOLTAGE_SWING_PATTERN1_LEVEL0; |
| 304 | exynos_dp_write_bytes_to_dpcd(dp, |
| 305 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 306 | lane_count, buf); |
| 307 | } |
| 308 | |
| 309 | static unsigned char exynos_dp_get_lane_status(u8 link_status[6], int lane) |
| 310 | { |
| 311 | int shift = (lane & 1) * 4; |
| 312 | u8 link_value = link_status[lane>>1]; |
| 313 | |
| 314 | return (link_value >> shift) & 0xf; |
| 315 | } |
| 316 | |
| 317 | static int exynos_dp_clock_recovery_ok(u8 link_status[6], int lane_count) |
| 318 | { |
| 319 | int lane; |
| 320 | u8 lane_status; |
| 321 | |
| 322 | for (lane = 0; lane < lane_count; lane++) { |
| 323 | lane_status = exynos_dp_get_lane_status(link_status, lane); |
| 324 | if ((lane_status & DPCD_LANE_CR_DONE) == 0) |
| 325 | return -EINVAL; |
| 326 | } |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | static int exynos_dp_channel_eq_ok(u8 link_status[6], int lane_count) |
| 331 | { |
| 332 | int lane; |
| 333 | u8 lane_align; |
| 334 | u8 lane_status; |
| 335 | |
| 336 | lane_align = link_status[2]; |
| 337 | if ((lane_align == DPCD_INTERLANE_ALIGN_DONE) == 0) |
| 338 | return -EINVAL; |
| 339 | |
| 340 | for (lane = 0; lane < lane_count; lane++) { |
| 341 | lane_status = exynos_dp_get_lane_status(link_status, lane); |
| 342 | lane_status &= DPCD_CHANNEL_EQ_BITS; |
| 343 | if (lane_status != DPCD_CHANNEL_EQ_BITS) |
| 344 | return -EINVAL; |
| 345 | } |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static unsigned char exynos_dp_get_adjust_request_voltage(u8 adjust_request[2], |
| 350 | int lane) |
| 351 | { |
| 352 | int shift = (lane & 1) * 4; |
| 353 | u8 link_value = adjust_request[lane>>1]; |
| 354 | |
| 355 | return (link_value >> shift) & 0x3; |
| 356 | } |
| 357 | |
| 358 | static unsigned char exynos_dp_get_adjust_request_pre_emphasis( |
| 359 | u8 adjust_request[2], |
| 360 | int lane) |
| 361 | { |
| 362 | int shift = (lane & 1) * 4; |
| 363 | u8 link_value = adjust_request[lane>>1]; |
| 364 | |
| 365 | return ((link_value >> shift) & 0xc) >> 2; |
| 366 | } |
| 367 | |
| 368 | static void exynos_dp_set_lane_link_training(struct exynos_dp_device *dp, |
| 369 | u8 training_lane_set, int lane) |
| 370 | { |
| 371 | switch (lane) { |
| 372 | case 0: |
| 373 | exynos_dp_set_lane0_link_training(dp, training_lane_set); |
| 374 | break; |
| 375 | case 1: |
| 376 | exynos_dp_set_lane1_link_training(dp, training_lane_set); |
| 377 | break; |
| 378 | |
| 379 | case 2: |
| 380 | exynos_dp_set_lane2_link_training(dp, training_lane_set); |
| 381 | break; |
| 382 | |
| 383 | case 3: |
| 384 | exynos_dp_set_lane3_link_training(dp, training_lane_set); |
| 385 | break; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | static unsigned int exynos_dp_get_lane_link_training( |
| 390 | struct exynos_dp_device *dp, |
| 391 | int lane) |
| 392 | { |
| 393 | u32 reg; |
| 394 | |
| 395 | switch (lane) { |
| 396 | case 0: |
| 397 | reg = exynos_dp_get_lane0_link_training(dp); |
| 398 | break; |
| 399 | case 1: |
| 400 | reg = exynos_dp_get_lane1_link_training(dp); |
| 401 | break; |
| 402 | case 2: |
| 403 | reg = exynos_dp_get_lane2_link_training(dp); |
| 404 | break; |
| 405 | case 3: |
| 406 | reg = exynos_dp_get_lane3_link_training(dp); |
| 407 | break; |
| 408 | } |
| 409 | |
| 410 | return reg; |
| 411 | } |
| 412 | |
| 413 | static void exynos_dp_reduce_link_rate(struct exynos_dp_device *dp) |
| 414 | { |
| 415 | if (dp->link_train.link_rate == LINK_RATE_2_70GBPS) { |
| 416 | /* set to reduced bit rate */ |
| 417 | dp->link_train.link_rate = LINK_RATE_1_62GBPS; |
| 418 | dev_err(dp->dev, "set to bandwidth %.2x\n", |
| 419 | dp->link_train.link_rate); |
| 420 | dp->link_train.lt_state = START; |
| 421 | } else { |
| 422 | exynos_dp_training_pattern_dis(dp); |
| 423 | /* set enhanced mode if available */ |
| 424 | exynos_dp_set_enhanced_mode(dp); |
| 425 | dp->link_train.lt_state = FAILED; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | static void exynos_dp_get_adjust_train(struct exynos_dp_device *dp, |
| 430 | u8 adjust_request[2]) |
| 431 | { |
| 432 | int lane; |
| 433 | int lane_count; |
| 434 | u8 voltage_swing; |
| 435 | u8 pre_emphasis; |
| 436 | u8 training_lane; |
| 437 | |
| 438 | lane_count = dp->link_train.lane_count; |
| 439 | for (lane = 0; lane < lane_count; lane++) { |
| 440 | voltage_swing = exynos_dp_get_adjust_request_voltage( |
| 441 | adjust_request, lane); |
| 442 | pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis( |
| 443 | adjust_request, lane); |
| 444 | training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) | |
| 445 | DPCD_PRE_EMPHASIS_SET(pre_emphasis); |
| 446 | |
| 447 | if (voltage_swing == VOLTAGE_LEVEL_3 || |
| 448 | pre_emphasis == PRE_EMPHASIS_LEVEL_3) { |
| 449 | training_lane |= DPCD_MAX_SWING_REACHED; |
| 450 | training_lane |= DPCD_MAX_PRE_EMPHASIS_REACHED; |
| 451 | } |
| 452 | dp->link_train.training_lane[lane] = training_lane; |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | static int exynos_dp_check_max_cr_loop(struct exynos_dp_device *dp, |
| 457 | u8 voltage_swing) |
| 458 | { |
| 459 | int lane; |
| 460 | int lane_count; |
| 461 | |
| 462 | lane_count = dp->link_train.lane_count; |
| 463 | for (lane = 0; lane < lane_count; lane++) { |
| 464 | if (voltage_swing == VOLTAGE_LEVEL_3 || |
| 465 | dp->link_train.cr_loop[lane] == MAX_CR_LOOP) |
| 466 | return -EINVAL; |
| 467 | } |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | static int exynos_dp_process_clock_recovery(struct exynos_dp_device *dp) |
| 472 | { |
| 473 | u8 data; |
| 474 | u8 link_status[6]; |
| 475 | int lane; |
| 476 | int lane_count; |
| 477 | u8 buf[5]; |
| 478 | |
Jingoo Han | 8f802da | 2012-04-04 16:00:00 +0900 | [diff] [blame] | 479 | u8 adjust_request[2]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 480 | u8 voltage_swing; |
| 481 | u8 pre_emphasis; |
| 482 | u8 training_lane; |
| 483 | |
| 484 | udelay(100); |
| 485 | |
| 486 | exynos_dp_read_bytes_from_dpcd(dp, DPCD_ADDR_LANE0_1_STATUS, |
| 487 | 6, link_status); |
| 488 | lane_count = dp->link_train.lane_count; |
| 489 | |
| 490 | if (exynos_dp_clock_recovery_ok(link_status, lane_count) == 0) { |
| 491 | /* set training pattern 2 for EQ */ |
| 492 | exynos_dp_set_training_pattern(dp, TRAINING_PTN2); |
| 493 | |
Jingoo Han | 8f802da | 2012-04-04 16:00:00 +0900 | [diff] [blame] | 494 | adjust_request[0] = link_status[4]; |
| 495 | adjust_request[1] = link_status[5]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 496 | |
| 497 | exynos_dp_get_adjust_train(dp, adjust_request); |
| 498 | |
| 499 | buf[0] = DPCD_SCRAMBLING_DISABLED | |
| 500 | DPCD_TRAINING_PATTERN_2; |
| 501 | exynos_dp_write_byte_to_dpcd(dp, |
| 502 | DPCD_ADDR_TRAINING_LANE0_SET, |
| 503 | buf[0]); |
| 504 | |
| 505 | for (lane = 0; lane < lane_count; lane++) { |
| 506 | exynos_dp_set_lane_link_training(dp, |
| 507 | dp->link_train.training_lane[lane], |
| 508 | lane); |
| 509 | buf[lane] = dp->link_train.training_lane[lane]; |
| 510 | exynos_dp_write_byte_to_dpcd(dp, |
| 511 | DPCD_ADDR_TRAINING_LANE0_SET + lane, |
| 512 | buf[lane]); |
| 513 | } |
| 514 | dp->link_train.lt_state = EQUALIZER_TRAINING; |
| 515 | } else { |
| 516 | exynos_dp_read_byte_from_dpcd(dp, |
| 517 | DPCD_ADDR_ADJUST_REQUEST_LANE0_1, |
| 518 | &data); |
| 519 | adjust_request[0] = data; |
| 520 | |
| 521 | exynos_dp_read_byte_from_dpcd(dp, |
| 522 | DPCD_ADDR_ADJUST_REQUEST_LANE2_3, |
| 523 | &data); |
| 524 | adjust_request[1] = data; |
| 525 | |
| 526 | for (lane = 0; lane < lane_count; lane++) { |
| 527 | training_lane = exynos_dp_get_lane_link_training( |
| 528 | dp, lane); |
| 529 | voltage_swing = exynos_dp_get_adjust_request_voltage( |
| 530 | adjust_request, lane); |
| 531 | pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis( |
| 532 | adjust_request, lane); |
| 533 | if ((DPCD_VOLTAGE_SWING_GET(training_lane) == voltage_swing) && |
| 534 | (DPCD_PRE_EMPHASIS_GET(training_lane) == pre_emphasis)) |
| 535 | dp->link_train.cr_loop[lane]++; |
| 536 | dp->link_train.training_lane[lane] = training_lane; |
| 537 | } |
| 538 | |
| 539 | if (exynos_dp_check_max_cr_loop(dp, voltage_swing) != 0) { |
| 540 | exynos_dp_reduce_link_rate(dp); |
| 541 | } else { |
| 542 | exynos_dp_get_adjust_train(dp, adjust_request); |
| 543 | |
| 544 | for (lane = 0; lane < lane_count; lane++) { |
| 545 | exynos_dp_set_lane_link_training(dp, |
| 546 | dp->link_train.training_lane[lane], |
| 547 | lane); |
| 548 | buf[lane] = dp->link_train.training_lane[lane]; |
| 549 | exynos_dp_write_byte_to_dpcd(dp, |
| 550 | DPCD_ADDR_TRAINING_LANE0_SET + lane, |
| 551 | buf[lane]); |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int exynos_dp_process_equalizer_training(struct exynos_dp_device *dp) |
| 560 | { |
| 561 | u8 link_status[6]; |
| 562 | int lane; |
| 563 | int lane_count; |
| 564 | u8 buf[5]; |
| 565 | u32 reg; |
| 566 | |
Jingoo Han | 8f802da | 2012-04-04 16:00:00 +0900 | [diff] [blame] | 567 | u8 adjust_request[2]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 568 | |
| 569 | udelay(400); |
| 570 | |
| 571 | exynos_dp_read_bytes_from_dpcd(dp, DPCD_ADDR_LANE0_1_STATUS, |
| 572 | 6, link_status); |
| 573 | lane_count = dp->link_train.lane_count; |
| 574 | |
| 575 | if (exynos_dp_clock_recovery_ok(link_status, lane_count) == 0) { |
Jingoo Han | 8f802da | 2012-04-04 16:00:00 +0900 | [diff] [blame] | 576 | adjust_request[0] = link_status[4]; |
| 577 | adjust_request[1] = link_status[5]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 578 | |
| 579 | if (exynos_dp_channel_eq_ok(link_status, lane_count) == 0) { |
| 580 | /* traing pattern Set to Normal */ |
| 581 | exynos_dp_training_pattern_dis(dp); |
| 582 | |
| 583 | dev_info(dp->dev, "Link Training success!\n"); |
| 584 | |
| 585 | exynos_dp_get_link_bandwidth(dp, ®); |
| 586 | dp->link_train.link_rate = reg; |
| 587 | dev_dbg(dp->dev, "final bandwidth = %.2x\n", |
| 588 | dp->link_train.link_rate); |
| 589 | |
| 590 | exynos_dp_get_lane_count(dp, ®); |
| 591 | dp->link_train.lane_count = reg; |
| 592 | dev_dbg(dp->dev, "final lane count = %.2x\n", |
| 593 | dp->link_train.lane_count); |
| 594 | /* set enhanced mode if available */ |
| 595 | exynos_dp_set_enhanced_mode(dp); |
| 596 | |
| 597 | dp->link_train.lt_state = FINISHED; |
| 598 | } else { |
| 599 | /* not all locked */ |
| 600 | dp->link_train.eq_loop++; |
| 601 | |
| 602 | if (dp->link_train.eq_loop > MAX_EQ_LOOP) { |
| 603 | exynos_dp_reduce_link_rate(dp); |
| 604 | } else { |
| 605 | exynos_dp_get_adjust_train(dp, adjust_request); |
| 606 | |
| 607 | for (lane = 0; lane < lane_count; lane++) { |
| 608 | exynos_dp_set_lane_link_training(dp, |
| 609 | dp->link_train.training_lane[lane], |
| 610 | lane); |
| 611 | buf[lane] = dp->link_train.training_lane[lane]; |
| 612 | exynos_dp_write_byte_to_dpcd(dp, |
| 613 | DPCD_ADDR_TRAINING_LANE0_SET + lane, |
| 614 | buf[lane]); |
| 615 | } |
| 616 | } |
| 617 | } |
| 618 | } else { |
| 619 | exynos_dp_reduce_link_rate(dp); |
| 620 | } |
| 621 | |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | static void exynos_dp_get_max_rx_bandwidth(struct exynos_dp_device *dp, |
| 626 | u8 *bandwidth) |
| 627 | { |
| 628 | u8 data; |
| 629 | |
| 630 | /* |
| 631 | * For DP rev.1.1, Maximum link rate of Main Link lanes |
| 632 | * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps |
| 633 | */ |
| 634 | exynos_dp_read_byte_from_dpcd(dp, DPCD_ADDR_MAX_LINK_RATE, &data); |
| 635 | *bandwidth = data; |
| 636 | } |
| 637 | |
| 638 | static void exynos_dp_get_max_rx_lane_count(struct exynos_dp_device *dp, |
| 639 | u8 *lane_count) |
| 640 | { |
| 641 | u8 data; |
| 642 | |
| 643 | /* |
| 644 | * For DP rev.1.1, Maximum number of Main Link lanes |
| 645 | * 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes |
| 646 | */ |
| 647 | exynos_dp_read_byte_from_dpcd(dp, DPCD_ADDR_MAX_LANE_COUNT, &data); |
| 648 | *lane_count = DPCD_MAX_LANE_COUNT(data); |
| 649 | } |
| 650 | |
| 651 | static void exynos_dp_init_training(struct exynos_dp_device *dp, |
| 652 | enum link_lane_count_type max_lane, |
| 653 | enum link_rate_type max_rate) |
| 654 | { |
| 655 | /* |
| 656 | * MACRO_RST must be applied after the PLL_LOCK to avoid |
| 657 | * the DP inter pair skew issue for at least 10 us |
| 658 | */ |
| 659 | exynos_dp_reset_macro(dp); |
| 660 | |
| 661 | /* Initialize by reading RX's DPCD */ |
| 662 | exynos_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate); |
| 663 | exynos_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count); |
| 664 | |
| 665 | if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) && |
| 666 | (dp->link_train.link_rate != LINK_RATE_2_70GBPS)) { |
| 667 | dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n", |
| 668 | dp->link_train.link_rate); |
| 669 | dp->link_train.link_rate = LINK_RATE_1_62GBPS; |
| 670 | } |
| 671 | |
| 672 | if (dp->link_train.lane_count == 0) { |
| 673 | dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n", |
| 674 | dp->link_train.lane_count); |
| 675 | dp->link_train.lane_count = (u8)LANE_COUNT1; |
| 676 | } |
| 677 | |
| 678 | /* Setup TX lane count & rate */ |
| 679 | if (dp->link_train.lane_count > max_lane) |
| 680 | dp->link_train.lane_count = max_lane; |
| 681 | if (dp->link_train.link_rate > max_rate) |
| 682 | dp->link_train.link_rate = max_rate; |
| 683 | |
| 684 | /* All DP analog module power up */ |
| 685 | exynos_dp_set_analog_power_down(dp, POWER_ALL, 0); |
| 686 | } |
| 687 | |
| 688 | static int exynos_dp_sw_link_training(struct exynos_dp_device *dp) |
| 689 | { |
| 690 | int retval = 0; |
| 691 | int training_finished; |
| 692 | |
| 693 | /* Turn off unnecessary lane */ |
| 694 | if (dp->link_train.lane_count == 1) |
| 695 | exynos_dp_set_analog_power_down(dp, CH1_BLOCK, 1); |
| 696 | |
| 697 | training_finished = 0; |
| 698 | |
| 699 | dp->link_train.lt_state = START; |
| 700 | |
| 701 | /* Process here */ |
| 702 | while (!training_finished) { |
| 703 | switch (dp->link_train.lt_state) { |
| 704 | case START: |
| 705 | exynos_dp_link_start(dp); |
| 706 | break; |
| 707 | case CLOCK_RECOVERY: |
| 708 | exynos_dp_process_clock_recovery(dp); |
| 709 | break; |
| 710 | case EQUALIZER_TRAINING: |
| 711 | exynos_dp_process_equalizer_training(dp); |
| 712 | break; |
| 713 | case FINISHED: |
| 714 | training_finished = 1; |
| 715 | break; |
| 716 | case FAILED: |
| 717 | return -EREMOTEIO; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | return retval; |
| 722 | } |
| 723 | |
| 724 | static int exynos_dp_set_link_train(struct exynos_dp_device *dp, |
| 725 | u32 count, |
| 726 | u32 bwtype) |
| 727 | { |
| 728 | int i; |
| 729 | int retval; |
| 730 | |
| 731 | for (i = 0; i < DP_TIMEOUT_LOOP_COUNT; i++) { |
| 732 | exynos_dp_init_training(dp, count, bwtype); |
| 733 | retval = exynos_dp_sw_link_training(dp); |
| 734 | if (retval == 0) |
| 735 | break; |
| 736 | |
| 737 | udelay(100); |
| 738 | } |
| 739 | |
| 740 | return retval; |
| 741 | } |
| 742 | |
| 743 | static int exynos_dp_config_video(struct exynos_dp_device *dp, |
| 744 | struct video_info *video_info) |
| 745 | { |
| 746 | int retval = 0; |
| 747 | int timeout_loop = 0; |
| 748 | int done_count = 0; |
| 749 | |
| 750 | exynos_dp_config_video_slave_mode(dp, video_info); |
| 751 | |
| 752 | exynos_dp_set_video_color_format(dp, video_info->color_depth, |
| 753 | video_info->color_space, |
| 754 | video_info->dynamic_range, |
| 755 | video_info->ycbcr_coeff); |
| 756 | |
| 757 | if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { |
| 758 | dev_err(dp->dev, "PLL is not locked yet.\n"); |
| 759 | return -EINVAL; |
| 760 | } |
| 761 | |
| 762 | for (;;) { |
| 763 | timeout_loop++; |
| 764 | if (exynos_dp_is_slave_video_stream_clock_on(dp) == 0) |
| 765 | break; |
| 766 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 767 | dev_err(dp->dev, "Timeout of video streamclk ok\n"); |
| 768 | return -ETIMEDOUT; |
| 769 | } |
| 770 | |
| 771 | mdelay(100); |
| 772 | } |
| 773 | |
| 774 | /* Set to use the register calculated M/N video */ |
| 775 | exynos_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0); |
| 776 | |
| 777 | /* For video bist, Video timing must be generated by register */ |
| 778 | exynos_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE); |
| 779 | |
| 780 | /* Disable video mute */ |
| 781 | exynos_dp_enable_video_mute(dp, 0); |
| 782 | |
| 783 | /* Configure video slave mode */ |
| 784 | exynos_dp_enable_video_master(dp, 0); |
| 785 | |
| 786 | /* Enable video */ |
| 787 | exynos_dp_start_video(dp); |
| 788 | |
| 789 | timeout_loop = 0; |
| 790 | |
| 791 | for (;;) { |
| 792 | timeout_loop++; |
| 793 | if (exynos_dp_is_video_stream_on(dp) == 0) { |
| 794 | done_count++; |
| 795 | if (done_count > 10) |
| 796 | break; |
| 797 | } else if (done_count) { |
| 798 | done_count = 0; |
| 799 | } |
| 800 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 801 | dev_err(dp->dev, "Timeout of video streamclk ok\n"); |
| 802 | return -ETIMEDOUT; |
| 803 | } |
| 804 | |
| 805 | mdelay(100); |
| 806 | } |
| 807 | |
| 808 | if (retval != 0) |
| 809 | dev_err(dp->dev, "Video stream is not detected!\n"); |
| 810 | |
| 811 | return retval; |
| 812 | } |
| 813 | |
| 814 | static void exynos_dp_enable_scramble(struct exynos_dp_device *dp, bool enable) |
| 815 | { |
| 816 | u8 data; |
| 817 | |
| 818 | if (enable) { |
| 819 | exynos_dp_enable_scrambling(dp); |
| 820 | |
| 821 | exynos_dp_read_byte_from_dpcd(dp, |
| 822 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 823 | &data); |
| 824 | exynos_dp_write_byte_to_dpcd(dp, |
| 825 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 826 | (u8)(data & ~DPCD_SCRAMBLING_DISABLED)); |
| 827 | } else { |
| 828 | exynos_dp_disable_scrambling(dp); |
| 829 | |
| 830 | exynos_dp_read_byte_from_dpcd(dp, |
| 831 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 832 | &data); |
| 833 | exynos_dp_write_byte_to_dpcd(dp, |
| 834 | DPCD_ADDR_TRAINING_PATTERN_SET, |
| 835 | (u8)(data | DPCD_SCRAMBLING_DISABLED)); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | static irqreturn_t exynos_dp_irq_handler(int irq, void *arg) |
| 840 | { |
| 841 | struct exynos_dp_device *dp = arg; |
| 842 | |
| 843 | dev_err(dp->dev, "exynos_dp_irq_handler\n"); |
| 844 | return IRQ_HANDLED; |
| 845 | } |
| 846 | |
| 847 | static int __devinit exynos_dp_probe(struct platform_device *pdev) |
| 848 | { |
| 849 | struct resource *res; |
| 850 | struct exynos_dp_device *dp; |
| 851 | struct exynos_dp_platdata *pdata; |
| 852 | |
| 853 | int ret = 0; |
| 854 | |
| 855 | pdata = pdev->dev.platform_data; |
| 856 | if (!pdata) { |
| 857 | dev_err(&pdev->dev, "no platform data\n"); |
| 858 | return -EINVAL; |
| 859 | } |
| 860 | |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 861 | dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device), |
| 862 | GFP_KERNEL); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 863 | if (!dp) { |
| 864 | dev_err(&pdev->dev, "no memory for device data\n"); |
| 865 | return -ENOMEM; |
| 866 | } |
| 867 | |
| 868 | dp->dev = &pdev->dev; |
| 869 | |
| 870 | dp->clock = clk_get(&pdev->dev, "dp"); |
| 871 | if (IS_ERR(dp->clock)) { |
| 872 | dev_err(&pdev->dev, "failed to get clock\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 873 | return PTR_ERR(dp->clock); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | clk_enable(dp->clock); |
| 877 | |
| 878 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 879 | if (!res) { |
| 880 | dev_err(&pdev->dev, "failed to get registers\n"); |
| 881 | ret = -EINVAL; |
| 882 | goto err_clock; |
| 883 | } |
| 884 | |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 885 | dp->reg_base = devm_request_and_ioremap(&pdev->dev, res); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 886 | if (!dp->reg_base) { |
| 887 | dev_err(&pdev->dev, "failed to ioremap\n"); |
| 888 | ret = -ENOMEM; |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 889 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | dp->irq = platform_get_irq(pdev, 0); |
| 893 | if (!dp->irq) { |
| 894 | dev_err(&pdev->dev, "failed to get irq\n"); |
| 895 | ret = -ENODEV; |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 896 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 897 | } |
| 898 | |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 899 | ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, 0, |
| 900 | "exynos-dp", dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 901 | if (ret) { |
| 902 | dev_err(&pdev->dev, "failed to request irq\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 903 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | dp->video_info = pdata->video_info; |
| 907 | if (pdata->phy_init) |
| 908 | pdata->phy_init(); |
| 909 | |
| 910 | exynos_dp_init_dp(dp); |
| 911 | |
| 912 | ret = exynos_dp_detect_hpd(dp); |
| 913 | if (ret) { |
| 914 | dev_err(&pdev->dev, "unable to detect hpd\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 915 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 916 | } |
| 917 | |
| 918 | exynos_dp_handle_edid(dp); |
| 919 | |
| 920 | ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count, |
| 921 | dp->video_info->link_rate); |
| 922 | if (ret) { |
| 923 | dev_err(&pdev->dev, "unable to do link train\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 924 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | exynos_dp_enable_scramble(dp, 1); |
| 928 | exynos_dp_enable_rx_to_enhanced_mode(dp, 1); |
| 929 | exynos_dp_enable_enhanced_mode(dp, 1); |
| 930 | |
| 931 | exynos_dp_set_lane_count(dp, dp->video_info->lane_count); |
| 932 | exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate); |
| 933 | |
| 934 | exynos_dp_init_video(dp); |
| 935 | ret = exynos_dp_config_video(dp, dp->video_info); |
| 936 | if (ret) { |
| 937 | dev_err(&pdev->dev, "unable to config video\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame^] | 938 | goto err_clock; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | platform_set_drvdata(pdev, dp); |
| 942 | |
| 943 | return 0; |
| 944 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 945 | err_clock: |
| 946 | clk_put(dp->clock); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 947 | |
| 948 | return ret; |
| 949 | } |
| 950 | |
| 951 | static int __devexit exynos_dp_remove(struct platform_device *pdev) |
| 952 | { |
| 953 | struct exynos_dp_platdata *pdata = pdev->dev.platform_data; |
| 954 | struct exynos_dp_device *dp = platform_get_drvdata(pdev); |
| 955 | |
| 956 | if (pdata && pdata->phy_exit) |
| 957 | pdata->phy_exit(); |
| 958 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 959 | clk_disable(dp->clock); |
| 960 | clk_put(dp->clock); |
| 961 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 962 | return 0; |
| 963 | } |
| 964 | |
| 965 | #ifdef CONFIG_PM_SLEEP |
| 966 | static int exynos_dp_suspend(struct device *dev) |
| 967 | { |
| 968 | struct platform_device *pdev = to_platform_device(dev); |
| 969 | struct exynos_dp_platdata *pdata = pdev->dev.platform_data; |
| 970 | struct exynos_dp_device *dp = platform_get_drvdata(pdev); |
| 971 | |
| 972 | if (pdata && pdata->phy_exit) |
| 973 | pdata->phy_exit(); |
| 974 | |
| 975 | clk_disable(dp->clock); |
| 976 | |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | static int exynos_dp_resume(struct device *dev) |
| 981 | { |
| 982 | struct platform_device *pdev = to_platform_device(dev); |
| 983 | struct exynos_dp_platdata *pdata = pdev->dev.platform_data; |
| 984 | struct exynos_dp_device *dp = platform_get_drvdata(pdev); |
| 985 | |
| 986 | if (pdata && pdata->phy_init) |
| 987 | pdata->phy_init(); |
| 988 | |
| 989 | clk_enable(dp->clock); |
| 990 | |
| 991 | exynos_dp_init_dp(dp); |
| 992 | |
| 993 | exynos_dp_detect_hpd(dp); |
| 994 | exynos_dp_handle_edid(dp); |
| 995 | |
| 996 | exynos_dp_set_link_train(dp, dp->video_info->lane_count, |
| 997 | dp->video_info->link_rate); |
| 998 | |
| 999 | exynos_dp_enable_scramble(dp, 1); |
| 1000 | exynos_dp_enable_rx_to_enhanced_mode(dp, 1); |
| 1001 | exynos_dp_enable_enhanced_mode(dp, 1); |
| 1002 | |
| 1003 | exynos_dp_set_lane_count(dp, dp->video_info->lane_count); |
| 1004 | exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate); |
| 1005 | |
| 1006 | exynos_dp_init_video(dp); |
| 1007 | exynos_dp_config_video(dp, dp->video_info); |
| 1008 | |
| 1009 | return 0; |
| 1010 | } |
| 1011 | #endif |
| 1012 | |
| 1013 | static const struct dev_pm_ops exynos_dp_pm_ops = { |
| 1014 | SET_SYSTEM_SLEEP_PM_OPS(exynos_dp_suspend, exynos_dp_resume) |
| 1015 | }; |
| 1016 | |
| 1017 | static struct platform_driver exynos_dp_driver = { |
| 1018 | .probe = exynos_dp_probe, |
| 1019 | .remove = __devexit_p(exynos_dp_remove), |
| 1020 | .driver = { |
| 1021 | .name = "exynos-dp", |
| 1022 | .owner = THIS_MODULE, |
| 1023 | .pm = &exynos_dp_pm_ops, |
| 1024 | }, |
| 1025 | }; |
| 1026 | |
| 1027 | module_platform_driver(exynos_dp_driver); |
| 1028 | |
| 1029 | MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); |
| 1030 | MODULE_DESCRIPTION("Samsung SoC DP Driver"); |
| 1031 | MODULE_LICENSE("GPL"); |