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> |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 15 | #include <linux/err.h> |
| 16 | #include <linux/clk.h> |
| 17 | #include <linux/io.h> |
| 18 | #include <linux/interrupt.h> |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 19 | #include <linux/of.h> |
Andrew Bresticker | b8b5247 | 2014-04-22 04:09:10 +0530 | [diff] [blame] | 20 | #include <linux/of_gpio.h> |
| 21 | #include <linux/gpio.h> |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 22 | #include <linux/component.h> |
Jingoo Han | 8114fab | 2013-10-16 21:58:16 +0530 | [diff] [blame] | 23 | #include <linux/phy/phy.h> |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 24 | #include <video/of_display_timing.h> |
| 25 | #include <video/of_videomode.h> |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 26 | |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 27 | #include <drm/drmP.h> |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 28 | #include <drm/drm_crtc.h> |
| 29 | #include <drm/drm_crtc_helper.h> |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 30 | #include <drm/drm_panel.h> |
Sean Paul | 1634ba2 | 2014-02-24 19:20:15 +0900 | [diff] [blame] | 31 | #include <drm/bridge/ptn3460.h> |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 32 | |
| 33 | #include "exynos_drm_drv.h" |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 34 | #include "exynos_dp_core.h" |
| 35 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 36 | #define ctx_from_connector(c) container_of(c, struct exynos_dp_device, \ |
| 37 | connector) |
| 38 | |
Sean Paul | 1634ba2 | 2014-02-24 19:20:15 +0900 | [diff] [blame] | 39 | struct bridge_init { |
| 40 | struct i2c_client *client; |
| 41 | struct device_node *node; |
| 42 | }; |
| 43 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 44 | static void exynos_dp_init_dp(struct exynos_dp_device *dp) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 45 | { |
| 46 | exynos_dp_reset(dp); |
| 47 | |
Jingoo Han | 24db03a | 2012-05-25 16:21:08 +0900 | [diff] [blame] | 48 | exynos_dp_swreset(dp); |
| 49 | |
Jingoo Han | 75435c7 | 2012-08-23 19:55:13 +0900 | [diff] [blame] | 50 | exynos_dp_init_analog_param(dp); |
| 51 | exynos_dp_init_interrupt(dp); |
| 52 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 53 | /* SW defined function Normal operation */ |
| 54 | exynos_dp_enable_sw_function(dp); |
| 55 | |
| 56 | exynos_dp_config_interrupt(dp); |
| 57 | exynos_dp_init_analog_func(dp); |
| 58 | |
| 59 | exynos_dp_init_hpd(dp); |
| 60 | exynos_dp_init_aux(dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static int exynos_dp_detect_hpd(struct exynos_dp_device *dp) |
| 64 | { |
| 65 | int timeout_loop = 0; |
| 66 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 67 | while (exynos_dp_get_plug_in_status(dp) != 0) { |
| 68 | timeout_loop++; |
| 69 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 70 | dev_err(dp->dev, "failed to get hpd plug status\n"); |
| 71 | return -ETIMEDOUT; |
| 72 | } |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 73 | usleep_range(10, 11); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static unsigned char exynos_dp_calc_edid_check_sum(unsigned char *edid_data) |
| 80 | { |
| 81 | int i; |
| 82 | unsigned char sum = 0; |
| 83 | |
| 84 | for (i = 0; i < EDID_BLOCK_LENGTH; i++) |
| 85 | sum = sum + edid_data[i]; |
| 86 | |
| 87 | return sum; |
| 88 | } |
| 89 | |
| 90 | static int exynos_dp_read_edid(struct exynos_dp_device *dp) |
| 91 | { |
| 92 | unsigned char edid[EDID_BLOCK_LENGTH * 2]; |
| 93 | unsigned int extend_block = 0; |
| 94 | unsigned char sum; |
| 95 | unsigned char test_vector; |
| 96 | int retval; |
| 97 | |
| 98 | /* |
| 99 | * EDID device address is 0x50. |
| 100 | * However, if necessary, you must have set upper address |
| 101 | * into E-EDID in I2C device, 0x30. |
| 102 | */ |
| 103 | |
| 104 | /* Read Extension Flag, Number of 128-byte EDID extension blocks */ |
Sean Paul | 99f5415 | 2012-11-01 02:13:00 +0000 | [diff] [blame] | 105 | retval = exynos_dp_read_byte_from_i2c(dp, I2C_EDID_DEVICE_ADDR, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 106 | EDID_EXTENSION_FLAG, |
| 107 | &extend_block); |
Sean Paul | 99f5415 | 2012-11-01 02:13:00 +0000 | [diff] [blame] | 108 | if (retval) |
| 109 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 110 | |
| 111 | if (extend_block > 0) { |
| 112 | dev_dbg(dp->dev, "EDID data includes a single extension!\n"); |
| 113 | |
| 114 | /* Read EDID data */ |
| 115 | retval = exynos_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, |
| 116 | EDID_HEADER_PATTERN, |
| 117 | EDID_BLOCK_LENGTH, |
| 118 | &edid[EDID_HEADER_PATTERN]); |
| 119 | if (retval != 0) { |
| 120 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 121 | return -EIO; |
| 122 | } |
| 123 | sum = exynos_dp_calc_edid_check_sum(edid); |
| 124 | if (sum != 0) { |
| 125 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 126 | return -EIO; |
| 127 | } |
| 128 | |
| 129 | /* Read additional EDID data */ |
| 130 | retval = exynos_dp_read_bytes_from_i2c(dp, |
| 131 | I2C_EDID_DEVICE_ADDR, |
| 132 | EDID_BLOCK_LENGTH, |
| 133 | EDID_BLOCK_LENGTH, |
| 134 | &edid[EDID_BLOCK_LENGTH]); |
| 135 | if (retval != 0) { |
| 136 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 137 | return -EIO; |
| 138 | } |
| 139 | sum = exynos_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH]); |
| 140 | if (sum != 0) { |
| 141 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 142 | return -EIO; |
| 143 | } |
| 144 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 145 | exynos_dp_read_byte_from_dpcd(dp, DP_TEST_REQUEST, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 146 | &test_vector); |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 147 | if (test_vector & DP_TEST_LINK_EDID_READ) { |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 148 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 149 | DP_TEST_EDID_CHECKSUM, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 150 | edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]); |
| 151 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 152 | DP_TEST_RESPONSE, |
| 153 | DP_TEST_EDID_CHECKSUM_WRITE); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 154 | } |
| 155 | } else { |
| 156 | dev_info(dp->dev, "EDID data does not include any extensions.\n"); |
| 157 | |
| 158 | /* Read EDID data */ |
| 159 | retval = exynos_dp_read_bytes_from_i2c(dp, |
| 160 | I2C_EDID_DEVICE_ADDR, |
| 161 | EDID_HEADER_PATTERN, |
| 162 | EDID_BLOCK_LENGTH, |
| 163 | &edid[EDID_HEADER_PATTERN]); |
| 164 | if (retval != 0) { |
| 165 | dev_err(dp->dev, "EDID Read failed!\n"); |
| 166 | return -EIO; |
| 167 | } |
| 168 | sum = exynos_dp_calc_edid_check_sum(edid); |
| 169 | if (sum != 0) { |
| 170 | dev_err(dp->dev, "EDID bad checksum!\n"); |
| 171 | return -EIO; |
| 172 | } |
| 173 | |
| 174 | exynos_dp_read_byte_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 175 | DP_TEST_REQUEST, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 176 | &test_vector); |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 177 | if (test_vector & DP_TEST_LINK_EDID_READ) { |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 178 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 179 | DP_TEST_EDID_CHECKSUM, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 180 | edid[EDID_CHECKSUM]); |
| 181 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 182 | DP_TEST_RESPONSE, |
| 183 | DP_TEST_EDID_CHECKSUM_WRITE); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 184 | } |
| 185 | } |
| 186 | |
| 187 | dev_err(dp->dev, "EDID Read success!\n"); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int exynos_dp_handle_edid(struct exynos_dp_device *dp) |
| 192 | { |
| 193 | u8 buf[12]; |
| 194 | int i; |
| 195 | int retval; |
| 196 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 197 | /* Read DPCD DP_DPCD_REV~RECEIVE_PORT1_CAP_1 */ |
| 198 | retval = exynos_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV, |
Sean Paul | 99f5415 | 2012-11-01 02:13:00 +0000 | [diff] [blame] | 199 | 12, buf); |
| 200 | if (retval) |
| 201 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 202 | |
| 203 | /* Read EDID */ |
| 204 | for (i = 0; i < 3; i++) { |
| 205 | retval = exynos_dp_read_edid(dp); |
Sean Paul | 99f5415 | 2012-11-01 02:13:00 +0000 | [diff] [blame] | 206 | if (!retval) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 207 | break; |
| 208 | } |
| 209 | |
| 210 | return retval; |
| 211 | } |
| 212 | |
| 213 | static void exynos_dp_enable_rx_to_enhanced_mode(struct exynos_dp_device *dp, |
| 214 | bool enable) |
| 215 | { |
| 216 | u8 data; |
| 217 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 218 | exynos_dp_read_byte_from_dpcd(dp, DP_LANE_COUNT_SET, &data); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 219 | |
| 220 | if (enable) |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 221 | exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, |
| 222 | DP_LANE_COUNT_ENHANCED_FRAME_EN | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 223 | DPCD_LANE_COUNT_SET(data)); |
| 224 | else |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 225 | exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 226 | DPCD_LANE_COUNT_SET(data)); |
| 227 | } |
| 228 | |
| 229 | static int exynos_dp_is_enhanced_mode_available(struct exynos_dp_device *dp) |
| 230 | { |
| 231 | u8 data; |
| 232 | int retval; |
| 233 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 234 | exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 235 | retval = DPCD_ENHANCED_FRAME_CAP(data); |
| 236 | |
| 237 | return retval; |
| 238 | } |
| 239 | |
| 240 | static void exynos_dp_set_enhanced_mode(struct exynos_dp_device *dp) |
| 241 | { |
| 242 | u8 data; |
| 243 | |
| 244 | data = exynos_dp_is_enhanced_mode_available(dp); |
| 245 | exynos_dp_enable_rx_to_enhanced_mode(dp, data); |
| 246 | exynos_dp_enable_enhanced_mode(dp, data); |
| 247 | } |
| 248 | |
| 249 | static void exynos_dp_training_pattern_dis(struct exynos_dp_device *dp) |
| 250 | { |
| 251 | exynos_dp_set_training_pattern(dp, DP_NONE); |
| 252 | |
| 253 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 254 | DP_TRAINING_PATTERN_SET, |
| 255 | DP_TRAINING_PATTERN_DISABLE); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | static void exynos_dp_set_lane_lane_pre_emphasis(struct exynos_dp_device *dp, |
| 259 | int pre_emphasis, int lane) |
| 260 | { |
| 261 | switch (lane) { |
| 262 | case 0: |
| 263 | exynos_dp_set_lane0_pre_emphasis(dp, pre_emphasis); |
| 264 | break; |
| 265 | case 1: |
| 266 | exynos_dp_set_lane1_pre_emphasis(dp, pre_emphasis); |
| 267 | break; |
| 268 | |
| 269 | case 2: |
| 270 | exynos_dp_set_lane2_pre_emphasis(dp, pre_emphasis); |
| 271 | break; |
| 272 | |
| 273 | case 3: |
| 274 | exynos_dp_set_lane3_pre_emphasis(dp, pre_emphasis); |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 279 | static int exynos_dp_link_start(struct exynos_dp_device *dp) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 280 | { |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 281 | u8 buf[4]; |
Sean Paul | 49ce41f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 282 | int lane, lane_count, pll_tries, retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 283 | |
| 284 | lane_count = dp->link_train.lane_count; |
| 285 | |
| 286 | dp->link_train.lt_state = CLOCK_RECOVERY; |
| 287 | dp->link_train.eq_loop = 0; |
| 288 | |
| 289 | for (lane = 0; lane < lane_count; lane++) |
| 290 | dp->link_train.cr_loop[lane] = 0; |
| 291 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 292 | /* Set link rate and count as you want to establish*/ |
| 293 | exynos_dp_set_link_bandwidth(dp, dp->link_train.link_rate); |
| 294 | exynos_dp_set_lane_count(dp, dp->link_train.lane_count); |
| 295 | |
| 296 | /* Setup RX configuration */ |
| 297 | buf[0] = dp->link_train.link_rate; |
| 298 | buf[1] = dp->link_train.lane_count; |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 299 | retval = exynos_dp_write_bytes_to_dpcd(dp, DP_LINK_BW_SET, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 300 | 2, buf); |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 301 | if (retval) |
| 302 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 303 | |
| 304 | /* Set TX pre-emphasis to minimum */ |
| 305 | for (lane = 0; lane < lane_count; lane++) |
| 306 | exynos_dp_set_lane_lane_pre_emphasis(dp, |
| 307 | PRE_EMPHASIS_LEVEL_0, lane); |
| 308 | |
Sean Paul | 49ce41f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 309 | /* Wait for PLL lock */ |
| 310 | pll_tries = 0; |
| 311 | while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { |
| 312 | if (pll_tries == DP_TIMEOUT_LOOP_COUNT) { |
| 313 | dev_err(dp->dev, "Wait for PLL lock timed out\n"); |
| 314 | return -ETIMEDOUT; |
| 315 | } |
| 316 | |
| 317 | pll_tries++; |
| 318 | usleep_range(90, 120); |
| 319 | } |
| 320 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 321 | /* Set training pattern 1 */ |
| 322 | exynos_dp_set_training_pattern(dp, TRAINING_PTN1); |
| 323 | |
| 324 | /* Set RX training pattern */ |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 325 | retval = exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 326 | DP_TRAINING_PATTERN_SET, |
| 327 | DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1); |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 328 | if (retval) |
| 329 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 330 | |
| 331 | for (lane = 0; lane < lane_count; lane++) |
Sonika Jindal | 0ded925 | 2014-08-08 16:23:42 +0530 | [diff] [blame] | 332 | buf[lane] = DP_TRAIN_PRE_EMPH_LEVEL_0 | |
| 333 | DP_TRAIN_VOLTAGE_SWING_LEVEL_0; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 334 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 335 | retval = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 336 | lane_count, buf); |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 337 | |
| 338 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 339 | } |
| 340 | |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 341 | static unsigned char exynos_dp_get_lane_status(u8 link_status[2], int lane) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 342 | { |
| 343 | int shift = (lane & 1) * 4; |
| 344 | u8 link_value = link_status[lane>>1]; |
| 345 | |
| 346 | return (link_value >> shift) & 0xf; |
| 347 | } |
| 348 | |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 349 | static int exynos_dp_clock_recovery_ok(u8 link_status[2], int lane_count) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 350 | { |
| 351 | int lane; |
| 352 | u8 lane_status; |
| 353 | |
| 354 | for (lane = 0; lane < lane_count; lane++) { |
| 355 | lane_status = exynos_dp_get_lane_status(link_status, lane); |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 356 | if ((lane_status & DP_LANE_CR_DONE) == 0) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 357 | return -EINVAL; |
| 358 | } |
| 359 | return 0; |
| 360 | } |
| 361 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 362 | static int exynos_dp_channel_eq_ok(u8 link_status[2], u8 link_align, |
| 363 | int lane_count) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 364 | { |
| 365 | int lane; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 366 | u8 lane_status; |
| 367 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 368 | if ((link_align & DP_INTERLANE_ALIGN_DONE) == 0) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 369 | return -EINVAL; |
| 370 | |
| 371 | for (lane = 0; lane < lane_count; lane++) { |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 372 | lane_status = exynos_dp_get_lane_status(link_status, lane); |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 373 | lane_status &= DP_CHANNEL_EQ_BITS; |
| 374 | if (lane_status != DP_CHANNEL_EQ_BITS) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 375 | return -EINVAL; |
| 376 | } |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 377 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static unsigned char exynos_dp_get_adjust_request_voltage(u8 adjust_request[2], |
| 382 | int lane) |
| 383 | { |
| 384 | int shift = (lane & 1) * 4; |
| 385 | u8 link_value = adjust_request[lane>>1]; |
| 386 | |
| 387 | return (link_value >> shift) & 0x3; |
| 388 | } |
| 389 | |
| 390 | static unsigned char exynos_dp_get_adjust_request_pre_emphasis( |
| 391 | u8 adjust_request[2], |
| 392 | int lane) |
| 393 | { |
| 394 | int shift = (lane & 1) * 4; |
| 395 | u8 link_value = adjust_request[lane>>1]; |
| 396 | |
| 397 | return ((link_value >> shift) & 0xc) >> 2; |
| 398 | } |
| 399 | |
| 400 | static void exynos_dp_set_lane_link_training(struct exynos_dp_device *dp, |
| 401 | u8 training_lane_set, int lane) |
| 402 | { |
| 403 | switch (lane) { |
| 404 | case 0: |
| 405 | exynos_dp_set_lane0_link_training(dp, training_lane_set); |
| 406 | break; |
| 407 | case 1: |
| 408 | exynos_dp_set_lane1_link_training(dp, training_lane_set); |
| 409 | break; |
| 410 | |
| 411 | case 2: |
| 412 | exynos_dp_set_lane2_link_training(dp, training_lane_set); |
| 413 | break; |
| 414 | |
| 415 | case 3: |
| 416 | exynos_dp_set_lane3_link_training(dp, training_lane_set); |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | static unsigned int exynos_dp_get_lane_link_training( |
| 422 | struct exynos_dp_device *dp, |
| 423 | int lane) |
| 424 | { |
| 425 | u32 reg; |
| 426 | |
| 427 | switch (lane) { |
| 428 | case 0: |
| 429 | reg = exynos_dp_get_lane0_link_training(dp); |
| 430 | break; |
| 431 | case 1: |
| 432 | reg = exynos_dp_get_lane1_link_training(dp); |
| 433 | break; |
| 434 | case 2: |
| 435 | reg = exynos_dp_get_lane2_link_training(dp); |
| 436 | break; |
| 437 | case 3: |
| 438 | reg = exynos_dp_get_lane3_link_training(dp); |
| 439 | break; |
Jingoo Han | 64c43df | 2012-06-20 10:25:48 +0900 | [diff] [blame] | 440 | default: |
| 441 | WARN_ON(1); |
| 442 | return 0; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | return reg; |
| 446 | } |
| 447 | |
| 448 | static void exynos_dp_reduce_link_rate(struct exynos_dp_device *dp) |
| 449 | { |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 450 | exynos_dp_training_pattern_dis(dp); |
| 451 | exynos_dp_set_enhanced_mode(dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 452 | |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 453 | dp->link_train.lt_state = FAILED; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 454 | } |
| 455 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 456 | static void exynos_dp_get_adjust_training_lane(struct exynos_dp_device *dp, |
| 457 | u8 adjust_request[2]) |
| 458 | { |
| 459 | int lane, lane_count; |
| 460 | u8 voltage_swing, pre_emphasis, training_lane; |
| 461 | |
| 462 | lane_count = dp->link_train.lane_count; |
| 463 | for (lane = 0; lane < lane_count; lane++) { |
| 464 | voltage_swing = exynos_dp_get_adjust_request_voltage( |
| 465 | adjust_request, lane); |
| 466 | pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis( |
| 467 | adjust_request, lane); |
| 468 | training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) | |
| 469 | DPCD_PRE_EMPHASIS_SET(pre_emphasis); |
| 470 | |
| 471 | if (voltage_swing == VOLTAGE_LEVEL_3) |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 472 | training_lane |= DP_TRAIN_MAX_SWING_REACHED; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 473 | if (pre_emphasis == PRE_EMPHASIS_LEVEL_3) |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 474 | training_lane |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 475 | |
| 476 | dp->link_train.training_lane[lane] = training_lane; |
| 477 | } |
| 478 | } |
| 479 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 480 | static int exynos_dp_process_clock_recovery(struct exynos_dp_device *dp) |
| 481 | { |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 482 | int lane, lane_count, retval; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 483 | u8 voltage_swing, pre_emphasis, training_lane; |
| 484 | u8 link_status[2], adjust_request[2]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 485 | |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 486 | usleep_range(100, 101); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 487 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 488 | lane_count = dp->link_train.lane_count; |
| 489 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 490 | retval = exynos_dp_read_bytes_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 491 | DP_LANE0_1_STATUS, 2, link_status); |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 492 | if (retval) |
| 493 | return retval; |
| 494 | |
| 495 | retval = exynos_dp_read_bytes_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 496 | DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 497 | if (retval) |
| 498 | return retval; |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 499 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 500 | if (exynos_dp_clock_recovery_ok(link_status, lane_count) == 0) { |
| 501 | /* set training pattern 2 for EQ */ |
| 502 | exynos_dp_set_training_pattern(dp, TRAINING_PTN2); |
| 503 | |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 504 | retval = exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 505 | DP_TRAINING_PATTERN_SET, |
| 506 | DP_LINK_SCRAMBLING_DISABLE | |
| 507 | DP_TRAINING_PATTERN_2); |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 508 | if (retval) |
| 509 | return retval; |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 510 | |
| 511 | dev_info(dp->dev, "Link Training Clock Recovery success\n"); |
| 512 | dp->link_train.lt_state = EQUALIZER_TRAINING; |
| 513 | } else { |
| 514 | for (lane = 0; lane < lane_count; lane++) { |
| 515 | training_lane = exynos_dp_get_lane_link_training( |
| 516 | dp, lane); |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 517 | voltage_swing = exynos_dp_get_adjust_request_voltage( |
| 518 | adjust_request, lane); |
| 519 | pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis( |
| 520 | adjust_request, lane); |
| 521 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 522 | if (DPCD_VOLTAGE_SWING_GET(training_lane) == |
| 523 | voltage_swing && |
| 524 | DPCD_PRE_EMPHASIS_GET(training_lane) == |
| 525 | pre_emphasis) |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 526 | dp->link_train.cr_loop[lane]++; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 527 | |
| 528 | if (dp->link_train.cr_loop[lane] == MAX_CR_LOOP || |
| 529 | voltage_swing == VOLTAGE_LEVEL_3 || |
| 530 | pre_emphasis == PRE_EMPHASIS_LEVEL_3) { |
| 531 | dev_err(dp->dev, "CR Max reached (%d,%d,%d)\n", |
| 532 | dp->link_train.cr_loop[lane], |
| 533 | voltage_swing, pre_emphasis); |
| 534 | exynos_dp_reduce_link_rate(dp); |
| 535 | return -EIO; |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 536 | } |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 537 | } |
| 538 | } |
| 539 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 540 | exynos_dp_get_adjust_training_lane(dp, adjust_request); |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 541 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 542 | for (lane = 0; lane < lane_count; lane++) |
| 543 | exynos_dp_set_lane_link_training(dp, |
| 544 | dp->link_train.training_lane[lane], lane); |
| 545 | |
| 546 | retval = exynos_dp_write_bytes_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 547 | DP_TRAINING_LANE0_SET, lane_count, |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 548 | dp->link_train.training_lane); |
| 549 | if (retval) |
| 550 | return retval; |
| 551 | |
| 552 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | static int exynos_dp_process_equalizer_training(struct exynos_dp_device *dp) |
| 556 | { |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 557 | int lane, lane_count, retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 558 | u32 reg; |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 559 | u8 link_align, link_status[2], adjust_request[2]; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 560 | |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 561 | usleep_range(400, 401); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 562 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 563 | lane_count = dp->link_train.lane_count; |
| 564 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 565 | retval = exynos_dp_read_bytes_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 566 | DP_LANE0_1_STATUS, 2, link_status); |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 567 | if (retval) |
| 568 | return retval; |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 569 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 570 | if (exynos_dp_clock_recovery_ok(link_status, lane_count)) { |
| 571 | exynos_dp_reduce_link_rate(dp); |
| 572 | return -EIO; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 573 | } |
| 574 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 575 | retval = exynos_dp_read_bytes_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 576 | DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 577 | if (retval) |
| 578 | return retval; |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 579 | |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 580 | retval = exynos_dp_read_byte_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 581 | DP_LANE_ALIGN_STATUS_UPDATED, &link_align); |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 582 | if (retval) |
| 583 | return retval; |
| 584 | |
| 585 | exynos_dp_get_adjust_training_lane(dp, adjust_request); |
| 586 | |
| 587 | if (!exynos_dp_channel_eq_ok(link_status, link_align, lane_count)) { |
| 588 | /* traing pattern Set to Normal */ |
| 589 | exynos_dp_training_pattern_dis(dp); |
| 590 | |
| 591 | dev_info(dp->dev, "Link Training success!\n"); |
| 592 | |
| 593 | exynos_dp_get_link_bandwidth(dp, ®); |
| 594 | dp->link_train.link_rate = reg; |
| 595 | dev_dbg(dp->dev, "final bandwidth = %.2x\n", |
| 596 | dp->link_train.link_rate); |
| 597 | |
| 598 | exynos_dp_get_lane_count(dp, ®); |
| 599 | dp->link_train.lane_count = reg; |
| 600 | dev_dbg(dp->dev, "final lane count = %.2x\n", |
| 601 | dp->link_train.lane_count); |
| 602 | |
| 603 | /* set enhanced mode if available */ |
| 604 | exynos_dp_set_enhanced_mode(dp); |
| 605 | dp->link_train.lt_state = FINISHED; |
| 606 | |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* not all locked */ |
| 611 | dp->link_train.eq_loop++; |
| 612 | |
| 613 | if (dp->link_train.eq_loop > MAX_EQ_LOOP) { |
| 614 | dev_err(dp->dev, "EQ Max loop\n"); |
| 615 | exynos_dp_reduce_link_rate(dp); |
| 616 | return -EIO; |
| 617 | } |
| 618 | |
| 619 | for (lane = 0; lane < lane_count; lane++) |
| 620 | exynos_dp_set_lane_link_training(dp, |
| 621 | dp->link_train.training_lane[lane], lane); |
| 622 | |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 623 | retval = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, |
Sean Paul | fadec4b | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 624 | lane_count, dp->link_train.training_lane); |
| 625 | |
| 626 | return retval; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | static void exynos_dp_get_max_rx_bandwidth(struct exynos_dp_device *dp, |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 630 | u8 *bandwidth) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 631 | { |
| 632 | u8 data; |
| 633 | |
| 634 | /* |
| 635 | * For DP rev.1.1, Maximum link rate of Main Link lanes |
| 636 | * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps |
| 637 | */ |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 638 | exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LINK_RATE, &data); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 639 | *bandwidth = data; |
| 640 | } |
| 641 | |
| 642 | static void exynos_dp_get_max_rx_lane_count(struct exynos_dp_device *dp, |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 643 | u8 *lane_count) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 644 | { |
| 645 | u8 data; |
| 646 | |
| 647 | /* |
| 648 | * For DP rev.1.1, Maximum number of Main Link lanes |
| 649 | * 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes |
| 650 | */ |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 651 | exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 652 | *lane_count = DPCD_MAX_LANE_COUNT(data); |
| 653 | } |
| 654 | |
| 655 | static void exynos_dp_init_training(struct exynos_dp_device *dp, |
| 656 | enum link_lane_count_type max_lane, |
| 657 | enum link_rate_type max_rate) |
| 658 | { |
| 659 | /* |
| 660 | * MACRO_RST must be applied after the PLL_LOCK to avoid |
| 661 | * the DP inter pair skew issue for at least 10 us |
| 662 | */ |
| 663 | exynos_dp_reset_macro(dp); |
| 664 | |
| 665 | /* Initialize by reading RX's DPCD */ |
| 666 | exynos_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate); |
| 667 | exynos_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count); |
| 668 | |
| 669 | if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) && |
| 670 | (dp->link_train.link_rate != LINK_RATE_2_70GBPS)) { |
| 671 | dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n", |
| 672 | dp->link_train.link_rate); |
| 673 | dp->link_train.link_rate = LINK_RATE_1_62GBPS; |
| 674 | } |
| 675 | |
| 676 | if (dp->link_train.lane_count == 0) { |
| 677 | dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n", |
| 678 | dp->link_train.lane_count); |
| 679 | dp->link_train.lane_count = (u8)LANE_COUNT1; |
| 680 | } |
| 681 | |
| 682 | /* Setup TX lane count & rate */ |
| 683 | if (dp->link_train.lane_count > max_lane) |
| 684 | dp->link_train.lane_count = max_lane; |
| 685 | if (dp->link_train.link_rate > max_rate) |
| 686 | dp->link_train.link_rate = max_rate; |
| 687 | |
| 688 | /* All DP analog module power up */ |
| 689 | exynos_dp_set_analog_power_down(dp, POWER_ALL, 0); |
| 690 | } |
| 691 | |
| 692 | static int exynos_dp_sw_link_training(struct exynos_dp_device *dp) |
| 693 | { |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 694 | int retval = 0, training_finished = 0; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 695 | |
| 696 | dp->link_train.lt_state = START; |
| 697 | |
| 698 | /* Process here */ |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 699 | while (!retval && !training_finished) { |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 700 | switch (dp->link_train.lt_state) { |
| 701 | case START: |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 702 | retval = exynos_dp_link_start(dp); |
| 703 | if (retval) |
| 704 | dev_err(dp->dev, "LT link start failed!\n"); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 705 | break; |
| 706 | case CLOCK_RECOVERY: |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 707 | retval = exynos_dp_process_clock_recovery(dp); |
| 708 | if (retval) |
| 709 | dev_err(dp->dev, "LT CR failed!\n"); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 710 | break; |
| 711 | case EQUALIZER_TRAINING: |
Jingoo Han | d5c0eed | 2012-07-19 13:52:59 +0900 | [diff] [blame] | 712 | retval = exynos_dp_process_equalizer_training(dp); |
| 713 | if (retval) |
| 714 | dev_err(dp->dev, "LT EQ failed!\n"); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 715 | break; |
| 716 | case FINISHED: |
| 717 | training_finished = 1; |
| 718 | break; |
| 719 | case FAILED: |
| 720 | return -EREMOTEIO; |
| 721 | } |
| 722 | } |
Sean Paul | ace2d7f | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 723 | if (retval) |
| 724 | dev_err(dp->dev, "eDP link training failed (%d)\n", retval); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 725 | |
| 726 | return retval; |
| 727 | } |
| 728 | |
| 729 | static int exynos_dp_set_link_train(struct exynos_dp_device *dp, |
| 730 | u32 count, |
| 731 | u32 bwtype) |
| 732 | { |
| 733 | int i; |
| 734 | int retval; |
| 735 | |
| 736 | for (i = 0; i < DP_TIMEOUT_LOOP_COUNT; i++) { |
| 737 | exynos_dp_init_training(dp, count, bwtype); |
| 738 | retval = exynos_dp_sw_link_training(dp); |
| 739 | if (retval == 0) |
| 740 | break; |
| 741 | |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 742 | usleep_range(100, 110); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 743 | } |
| 744 | |
| 745 | return retval; |
| 746 | } |
| 747 | |
Ajay Kumar | 3fcb6eb | 2012-11-09 14:05:06 +0900 | [diff] [blame] | 748 | static int exynos_dp_config_video(struct exynos_dp_device *dp) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 749 | { |
| 750 | int retval = 0; |
| 751 | int timeout_loop = 0; |
| 752 | int done_count = 0; |
| 753 | |
Ajay Kumar | 3fcb6eb | 2012-11-09 14:05:06 +0900 | [diff] [blame] | 754 | exynos_dp_config_video_slave_mode(dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 755 | |
Ajay Kumar | 3fcb6eb | 2012-11-09 14:05:06 +0900 | [diff] [blame] | 756 | exynos_dp_set_video_color_format(dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 757 | |
| 758 | if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { |
| 759 | dev_err(dp->dev, "PLL is not locked yet.\n"); |
| 760 | return -EINVAL; |
| 761 | } |
| 762 | |
| 763 | for (;;) { |
| 764 | timeout_loop++; |
| 765 | if (exynos_dp_is_slave_video_stream_clock_on(dp) == 0) |
| 766 | break; |
| 767 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 768 | dev_err(dp->dev, "Timeout of video streamclk ok\n"); |
| 769 | return -ETIMEDOUT; |
| 770 | } |
| 771 | |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 772 | usleep_range(1, 2); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | /* Set to use the register calculated M/N video */ |
| 776 | exynos_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0); |
| 777 | |
| 778 | /* For video bist, Video timing must be generated by register */ |
| 779 | exynos_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE); |
| 780 | |
| 781 | /* Disable video mute */ |
| 782 | exynos_dp_enable_video_mute(dp, 0); |
| 783 | |
| 784 | /* Configure video slave mode */ |
| 785 | exynos_dp_enable_video_master(dp, 0); |
| 786 | |
| 787 | /* Enable video */ |
| 788 | exynos_dp_start_video(dp); |
| 789 | |
| 790 | timeout_loop = 0; |
| 791 | |
| 792 | for (;;) { |
| 793 | timeout_loop++; |
| 794 | if (exynos_dp_is_video_stream_on(dp) == 0) { |
| 795 | done_count++; |
| 796 | if (done_count > 10) |
| 797 | break; |
| 798 | } else if (done_count) { |
| 799 | done_count = 0; |
| 800 | } |
| 801 | if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { |
| 802 | dev_err(dp->dev, "Timeout of video streamclk ok\n"); |
| 803 | return -ETIMEDOUT; |
| 804 | } |
| 805 | |
Jingoo Han | a2c81bc | 2012-07-18 18:50:59 +0900 | [diff] [blame] | 806 | usleep_range(1000, 1001); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | if (retval != 0) |
| 810 | dev_err(dp->dev, "Video stream is not detected!\n"); |
| 811 | |
| 812 | return retval; |
| 813 | } |
| 814 | |
| 815 | static void exynos_dp_enable_scramble(struct exynos_dp_device *dp, bool enable) |
| 816 | { |
| 817 | u8 data; |
| 818 | |
| 819 | if (enable) { |
| 820 | exynos_dp_enable_scrambling(dp); |
| 821 | |
| 822 | exynos_dp_read_byte_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 823 | DP_TRAINING_PATTERN_SET, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 824 | &data); |
| 825 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 826 | DP_TRAINING_PATTERN_SET, |
| 827 | (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE)); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 828 | } else { |
| 829 | exynos_dp_disable_scrambling(dp); |
| 830 | |
| 831 | exynos_dp_read_byte_from_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 832 | DP_TRAINING_PATTERN_SET, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 833 | &data); |
| 834 | exynos_dp_write_byte_to_dpcd(dp, |
Jingoo Han | 073ea2a | 2014-05-07 20:44:51 +0900 | [diff] [blame] | 835 | DP_TRAINING_PATTERN_SET, |
| 836 | (u8)(data | DP_LINK_SCRAMBLING_DISABLE)); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 837 | } |
| 838 | } |
| 839 | |
| 840 | static irqreturn_t exynos_dp_irq_handler(int irq, void *arg) |
| 841 | { |
| 842 | struct exynos_dp_device *dp = arg; |
| 843 | |
Sean Paul | c30ffb9 | 2012-11-01 19:13:46 +0900 | [diff] [blame] | 844 | enum dp_irq_type irq_type; |
| 845 | |
| 846 | irq_type = exynos_dp_get_irq_type(dp); |
| 847 | switch (irq_type) { |
| 848 | case DP_IRQ_TYPE_HP_CABLE_IN: |
| 849 | dev_dbg(dp->dev, "Received irq - cable in\n"); |
| 850 | schedule_work(&dp->hotplug_work); |
| 851 | exynos_dp_clear_hotplug_interrupts(dp); |
| 852 | break; |
| 853 | case DP_IRQ_TYPE_HP_CABLE_OUT: |
| 854 | dev_dbg(dp->dev, "Received irq - cable out\n"); |
| 855 | exynos_dp_clear_hotplug_interrupts(dp); |
| 856 | break; |
| 857 | case DP_IRQ_TYPE_HP_CHANGE: |
| 858 | /* |
| 859 | * We get these change notifications once in a while, but there |
| 860 | * is nothing we can do with them. Just ignore it for now and |
| 861 | * only handle cable changes. |
| 862 | */ |
| 863 | dev_dbg(dp->dev, "Received irq - hotplug change; ignoring.\n"); |
| 864 | exynos_dp_clear_hotplug_interrupts(dp); |
| 865 | break; |
| 866 | default: |
| 867 | dev_err(dp->dev, "Received irq - unknown type!\n"); |
| 868 | break; |
| 869 | } |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 870 | return IRQ_HANDLED; |
| 871 | } |
| 872 | |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 873 | static void exynos_dp_hotplug(struct work_struct *work) |
| 874 | { |
| 875 | struct exynos_dp_device *dp; |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 876 | |
| 877 | dp = container_of(work, struct exynos_dp_device, hotplug_work); |
| 878 | |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 879 | if (dp->drm_dev) |
| 880 | drm_helper_hpd_irq_event(dp->drm_dev); |
| 881 | } |
| 882 | |
| 883 | static void exynos_dp_commit(struct exynos_drm_display *display) |
| 884 | { |
| 885 | struct exynos_dp_device *dp = display->ctx; |
| 886 | int ret; |
| 887 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 888 | /* Keep the panel disabled while we configure video */ |
| 889 | if (dp->panel) { |
| 890 | if (drm_panel_disable(dp->panel)) |
| 891 | DRM_ERROR("failed to disable the panel\n"); |
| 892 | } |
| 893 | |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 894 | ret = exynos_dp_detect_hpd(dp); |
| 895 | if (ret) { |
Sean Paul | c30ffb9 | 2012-11-01 19:13:46 +0900 | [diff] [blame] | 896 | /* Cable has been disconnected, we're done */ |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 897 | return; |
| 898 | } |
| 899 | |
| 900 | ret = exynos_dp_handle_edid(dp); |
| 901 | if (ret) { |
| 902 | dev_err(dp->dev, "unable to handle edid\n"); |
| 903 | return; |
| 904 | } |
| 905 | |
| 906 | ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count, |
| 907 | dp->video_info->link_rate); |
| 908 | if (ret) { |
| 909 | dev_err(dp->dev, "unable to do link train\n"); |
| 910 | return; |
| 911 | } |
| 912 | |
| 913 | exynos_dp_enable_scramble(dp, 1); |
| 914 | exynos_dp_enable_rx_to_enhanced_mode(dp, 1); |
| 915 | exynos_dp_enable_enhanced_mode(dp, 1); |
| 916 | |
| 917 | exynos_dp_set_lane_count(dp, dp->video_info->lane_count); |
| 918 | exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate); |
| 919 | |
| 920 | exynos_dp_init_video(dp); |
Ajay Kumar | 3fcb6eb | 2012-11-09 14:05:06 +0900 | [diff] [blame] | 921 | ret = exynos_dp_config_video(dp); |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 922 | if (ret) |
| 923 | dev_err(dp->dev, "unable to config video\n"); |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 924 | |
| 925 | /* Safe to enable the panel now */ |
| 926 | if (dp->panel) { |
| 927 | if (drm_panel_enable(dp->panel)) |
| 928 | DRM_ERROR("failed to enable the panel\n"); |
| 929 | } |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 930 | } |
| 931 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 932 | static enum drm_connector_status exynos_dp_detect( |
| 933 | struct drm_connector *connector, bool force) |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 934 | { |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 935 | return connector_status_connected; |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 936 | } |
| 937 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 938 | static void exynos_dp_connector_destroy(struct drm_connector *connector) |
| 939 | { |
Andrzej Hajda | 7c61b1e | 2014-09-09 15:16:12 +0200 | [diff] [blame^] | 940 | drm_connector_unregister(connector); |
| 941 | drm_connector_cleanup(connector); |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | static struct drm_connector_funcs exynos_dp_connector_funcs = { |
| 945 | .dpms = drm_helper_connector_dpms, |
| 946 | .fill_modes = drm_helper_probe_single_connector_modes, |
| 947 | .detect = exynos_dp_detect, |
| 948 | .destroy = exynos_dp_connector_destroy, |
| 949 | }; |
| 950 | |
| 951 | static int exynos_dp_get_modes(struct drm_connector *connector) |
| 952 | { |
| 953 | struct exynos_dp_device *dp = ctx_from_connector(connector); |
| 954 | struct drm_display_mode *mode; |
| 955 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 956 | if (dp->panel) |
| 957 | return drm_panel_get_modes(dp->panel); |
| 958 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 959 | mode = drm_mode_create(connector->dev); |
| 960 | if (!mode) { |
| 961 | DRM_ERROR("failed to create a new display mode.\n"); |
| 962 | return 0; |
| 963 | } |
| 964 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 965 | drm_display_mode_from_videomode(&dp->priv.vm, mode); |
| 966 | mode->width_mm = dp->priv.width_mm; |
| 967 | mode->height_mm = dp->priv.height_mm; |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 968 | connector->display_info.width_mm = mode->width_mm; |
| 969 | connector->display_info.height_mm = mode->height_mm; |
| 970 | |
| 971 | mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
| 972 | drm_mode_set_name(mode); |
| 973 | drm_mode_probed_add(connector, mode); |
| 974 | |
| 975 | return 1; |
| 976 | } |
| 977 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 978 | static struct drm_encoder *exynos_dp_best_encoder( |
| 979 | struct drm_connector *connector) |
| 980 | { |
| 981 | struct exynos_dp_device *dp = ctx_from_connector(connector); |
| 982 | |
| 983 | return dp->encoder; |
| 984 | } |
| 985 | |
| 986 | static struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = { |
| 987 | .get_modes = exynos_dp_get_modes, |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 988 | .best_encoder = exynos_dp_best_encoder, |
| 989 | }; |
| 990 | |
Sean Paul | 1634ba2 | 2014-02-24 19:20:15 +0900 | [diff] [blame] | 991 | static bool find_bridge(const char *compat, struct bridge_init *bridge) |
| 992 | { |
| 993 | bridge->client = NULL; |
| 994 | bridge->node = of_find_compatible_node(NULL, NULL, compat); |
| 995 | if (!bridge->node) |
| 996 | return false; |
| 997 | |
| 998 | bridge->client = of_find_i2c_device_by_node(bridge->node); |
| 999 | if (!bridge->client) |
| 1000 | return false; |
| 1001 | |
| 1002 | return true; |
| 1003 | } |
| 1004 | |
| 1005 | /* returns the number of bridges attached */ |
| 1006 | static int exynos_drm_attach_lcd_bridge(struct drm_device *dev, |
| 1007 | struct drm_encoder *encoder) |
| 1008 | { |
| 1009 | struct bridge_init bridge; |
| 1010 | int ret; |
| 1011 | |
| 1012 | if (find_bridge("nxp,ptn3460", &bridge)) { |
| 1013 | ret = ptn3460_init(dev, encoder, bridge.client, bridge.node); |
| 1014 | if (!ret) |
| 1015 | return 1; |
| 1016 | } |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 1020 | static int exynos_dp_create_connector(struct exynos_drm_display *display, |
| 1021 | struct drm_encoder *encoder) |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1022 | { |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 1023 | struct exynos_dp_device *dp = display->ctx; |
| 1024 | struct drm_connector *connector = &dp->connector; |
| 1025 | int ret; |
| 1026 | |
| 1027 | dp->encoder = encoder; |
Sean Paul | 1634ba2 | 2014-02-24 19:20:15 +0900 | [diff] [blame] | 1028 | |
| 1029 | /* Pre-empt DP connector creation if there's a bridge */ |
| 1030 | ret = exynos_drm_attach_lcd_bridge(dp->drm_dev, encoder); |
| 1031 | if (ret) |
| 1032 | return 0; |
| 1033 | |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 1034 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
| 1035 | |
| 1036 | ret = drm_connector_init(dp->drm_dev, connector, |
| 1037 | &exynos_dp_connector_funcs, DRM_MODE_CONNECTOR_eDP); |
| 1038 | if (ret) { |
| 1039 | DRM_ERROR("Failed to initialize connector with drm\n"); |
| 1040 | return ret; |
| 1041 | } |
| 1042 | |
| 1043 | drm_connector_helper_add(connector, &exynos_dp_connector_helper_funcs); |
Thomas Wood | 34ea3d3 | 2014-05-29 16:57:41 +0100 | [diff] [blame] | 1044 | drm_connector_register(connector); |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 1045 | drm_mode_connector_attach_encoder(connector, encoder); |
| 1046 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1047 | if (dp->panel) |
| 1048 | ret = drm_panel_attach(dp->panel, &dp->connector); |
| 1049 | |
| 1050 | return ret; |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1051 | } |
| 1052 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1053 | static void exynos_dp_phy_init(struct exynos_dp_device *dp) |
| 1054 | { |
| 1055 | if (dp->phy) { |
| 1056 | phy_power_on(dp->phy); |
| 1057 | } else if (dp->phy_addr) { |
| 1058 | u32 reg; |
| 1059 | |
| 1060 | reg = __raw_readl(dp->phy_addr); |
| 1061 | reg |= dp->enable_mask; |
| 1062 | __raw_writel(reg, dp->phy_addr); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | static void exynos_dp_phy_exit(struct exynos_dp_device *dp) |
| 1067 | { |
| 1068 | if (dp->phy) { |
| 1069 | phy_power_off(dp->phy); |
| 1070 | } else if (dp->phy_addr) { |
| 1071 | u32 reg; |
| 1072 | |
| 1073 | reg = __raw_readl(dp->phy_addr); |
| 1074 | reg &= ~(dp->enable_mask); |
| 1075 | __raw_writel(reg, dp->phy_addr); |
| 1076 | } |
| 1077 | } |
| 1078 | |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1079 | static void exynos_dp_poweron(struct exynos_drm_display *display) |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1080 | { |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1081 | struct exynos_dp_device *dp = display->ctx; |
| 1082 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1083 | if (dp->dpms_mode == DRM_MODE_DPMS_ON) |
| 1084 | return; |
| 1085 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1086 | if (dp->panel) { |
| 1087 | if (drm_panel_prepare(dp->panel)) { |
| 1088 | DRM_ERROR("failed to setup the panel\n"); |
| 1089 | return; |
| 1090 | } |
| 1091 | } |
| 1092 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1093 | clk_prepare_enable(dp->clock); |
| 1094 | exynos_dp_phy_init(dp); |
| 1095 | exynos_dp_init_dp(dp); |
| 1096 | enable_irq(dp->irq); |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1097 | exynos_dp_commit(display); |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1098 | } |
| 1099 | |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1100 | static void exynos_dp_poweroff(struct exynos_drm_display *display) |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1101 | { |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1102 | struct exynos_dp_device *dp = display->ctx; |
| 1103 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1104 | if (dp->dpms_mode != DRM_MODE_DPMS_ON) |
| 1105 | return; |
| 1106 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1107 | if (dp->panel) { |
| 1108 | if (drm_panel_disable(dp->panel)) { |
| 1109 | DRM_ERROR("failed to disable the panel\n"); |
| 1110 | return; |
| 1111 | } |
| 1112 | } |
| 1113 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1114 | disable_irq(dp->irq); |
| 1115 | flush_work(&dp->hotplug_work); |
| 1116 | exynos_dp_phy_exit(dp); |
| 1117 | clk_disable_unprepare(dp->clock); |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1118 | |
| 1119 | if (dp->panel) { |
| 1120 | if (drm_panel_unprepare(dp->panel)) |
| 1121 | DRM_ERROR("failed to turnoff the panel\n"); |
| 1122 | } |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | static void exynos_dp_dpms(struct exynos_drm_display *display, int mode) |
| 1126 | { |
| 1127 | struct exynos_dp_device *dp = display->ctx; |
| 1128 | |
| 1129 | switch (mode) { |
| 1130 | case DRM_MODE_DPMS_ON: |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1131 | exynos_dp_poweron(display); |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1132 | break; |
| 1133 | case DRM_MODE_DPMS_STANDBY: |
| 1134 | case DRM_MODE_DPMS_SUSPEND: |
| 1135 | case DRM_MODE_DPMS_OFF: |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1136 | exynos_dp_poweroff(display); |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1137 | break; |
| 1138 | default: |
| 1139 | break; |
Damien Lespiau | 10d9b4e | 2014-06-09 14:21:08 +0100 | [diff] [blame] | 1140 | } |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1141 | dp->dpms_mode = mode; |
| 1142 | } |
| 1143 | |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1144 | static struct exynos_drm_display_ops exynos_dp_display_ops = { |
Sean Paul | caa5d1e | 2014-01-30 16:19:30 -0500 | [diff] [blame] | 1145 | .create_connector = exynos_dp_create_connector, |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1146 | .dpms = exynos_dp_dpms, |
Ajay Kumar | 4deabfa | 2014-07-31 23:12:13 +0530 | [diff] [blame] | 1147 | .commit = exynos_dp_commit, |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1148 | }; |
| 1149 | |
| 1150 | static struct exynos_drm_display exynos_dp_display = { |
| 1151 | .type = EXYNOS_DISPLAY_TYPE_LCD, |
| 1152 | .ops = &exynos_dp_display_ops, |
| 1153 | }; |
| 1154 | |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1155 | static struct video_info *exynos_dp_dt_parse_pdata(struct device *dev) |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1156 | { |
| 1157 | struct device_node *dp_node = dev->of_node; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1158 | struct video_info *dp_video_config; |
| 1159 | |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1160 | dp_video_config = devm_kzalloc(dev, |
| 1161 | sizeof(*dp_video_config), GFP_KERNEL); |
Jingoo Han | 7a5b6827 | 2014-04-17 19:08:14 +0900 | [diff] [blame] | 1162 | if (!dp_video_config) |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1163 | return ERR_PTR(-ENOMEM); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1164 | |
| 1165 | dp_video_config->h_sync_polarity = |
| 1166 | of_property_read_bool(dp_node, "hsync-active-high"); |
| 1167 | |
| 1168 | dp_video_config->v_sync_polarity = |
| 1169 | of_property_read_bool(dp_node, "vsync-active-high"); |
| 1170 | |
| 1171 | dp_video_config->interlaced = |
| 1172 | of_property_read_bool(dp_node, "interlaced"); |
| 1173 | |
| 1174 | if (of_property_read_u32(dp_node, "samsung,color-space", |
| 1175 | &dp_video_config->color_space)) { |
| 1176 | dev_err(dev, "failed to get color-space\n"); |
| 1177 | return ERR_PTR(-EINVAL); |
| 1178 | } |
| 1179 | |
| 1180 | if (of_property_read_u32(dp_node, "samsung,dynamic-range", |
| 1181 | &dp_video_config->dynamic_range)) { |
| 1182 | dev_err(dev, "failed to get dynamic-range\n"); |
| 1183 | return ERR_PTR(-EINVAL); |
| 1184 | } |
| 1185 | |
| 1186 | if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff", |
| 1187 | &dp_video_config->ycbcr_coeff)) { |
| 1188 | dev_err(dev, "failed to get ycbcr-coeff\n"); |
| 1189 | return ERR_PTR(-EINVAL); |
| 1190 | } |
| 1191 | |
| 1192 | if (of_property_read_u32(dp_node, "samsung,color-depth", |
| 1193 | &dp_video_config->color_depth)) { |
| 1194 | dev_err(dev, "failed to get color-depth\n"); |
| 1195 | return ERR_PTR(-EINVAL); |
| 1196 | } |
| 1197 | |
| 1198 | if (of_property_read_u32(dp_node, "samsung,link-rate", |
| 1199 | &dp_video_config->link_rate)) { |
| 1200 | dev_err(dev, "failed to get link-rate\n"); |
| 1201 | return ERR_PTR(-EINVAL); |
| 1202 | } |
| 1203 | |
| 1204 | if (of_property_read_u32(dp_node, "samsung,lane-count", |
| 1205 | &dp_video_config->lane_count)) { |
| 1206 | dev_err(dev, "failed to get lane-count\n"); |
| 1207 | return ERR_PTR(-EINVAL); |
| 1208 | } |
| 1209 | |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1210 | return dp_video_config; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp) |
| 1214 | { |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1215 | struct device_node *dp_phy_node = of_node_get(dp->dev->of_node); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1216 | u32 phy_base; |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1217 | int ret = 0; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1218 | |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1219 | dp_phy_node = of_find_node_by_name(dp_phy_node, "dptx-phy"); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1220 | if (!dp_phy_node) { |
Jingoo Han | 8114fab | 2013-10-16 21:58:16 +0530 | [diff] [blame] | 1221 | dp->phy = devm_phy_get(dp->dev, "dp"); |
Sachin Kamat | 97f98a3 | 2014-05-29 11:26:24 +0530 | [diff] [blame] | 1222 | return PTR_ERR_OR_ZERO(dp->phy); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1223 | } |
| 1224 | |
| 1225 | if (of_property_read_u32(dp_phy_node, "reg", &phy_base)) { |
Masanari Iida | 1051e9b | 2013-03-31 01:23:50 +0900 | [diff] [blame] | 1226 | dev_err(dp->dev, "failed to get reg for dptx-phy\n"); |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1227 | ret = -EINVAL; |
| 1228 | goto err; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | if (of_property_read_u32(dp_phy_node, "samsung,enable-mask", |
| 1232 | &dp->enable_mask)) { |
Masanari Iida | 1051e9b | 2013-03-31 01:23:50 +0900 | [diff] [blame] | 1233 | dev_err(dp->dev, "failed to get enable-mask for dptx-phy\n"); |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1234 | ret = -EINVAL; |
| 1235 | goto err; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1236 | } |
| 1237 | |
| 1238 | dp->phy_addr = ioremap(phy_base, SZ_4); |
| 1239 | if (!dp->phy_addr) { |
| 1240 | dev_err(dp->dev, "failed to ioremap dp-phy\n"); |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1241 | ret = -ENOMEM; |
| 1242 | goto err; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1243 | } |
| 1244 | |
Jingoo Han | d3ed970 | 2013-02-21 16:42:37 -0800 | [diff] [blame] | 1245 | err: |
| 1246 | of_node_put(dp_phy_node); |
| 1247 | |
| 1248 | return ret; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1249 | } |
| 1250 | |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1251 | static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp) |
| 1252 | { |
| 1253 | int ret; |
| 1254 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1255 | ret = of_get_videomode(dp->dev->of_node, &dp->priv.vm, |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1256 | OF_USE_NATIVE_MODE); |
| 1257 | if (ret) { |
| 1258 | DRM_ERROR("failed: of_get_videomode() : %d\n", ret); |
| 1259 | return ret; |
| 1260 | } |
| 1261 | return 0; |
| 1262 | } |
| 1263 | |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1264 | static int exynos_dp_bind(struct device *dev, struct device *master, void *data) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1265 | { |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1266 | struct platform_device *pdev = to_platform_device(dev); |
| 1267 | struct drm_device *drm_dev = data; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1268 | struct resource *res; |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1269 | struct exynos_dp_device *dp = exynos_dp_display.ctx; |
Andrew Bresticker | b8b5247 | 2014-04-22 04:09:10 +0530 | [diff] [blame] | 1270 | unsigned int irq_flags; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1271 | int ret = 0; |
| 1272 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1273 | dp->dev = &pdev->dev; |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1274 | dp->dpms_mode = DRM_MODE_DPMS_OFF; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1275 | |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1276 | dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev); |
| 1277 | if (IS_ERR(dp->video_info)) |
| 1278 | return PTR_ERR(dp->video_info); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1279 | |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1280 | ret = exynos_dp_dt_parse_phydata(dp); |
| 1281 | if (ret) |
| 1282 | return ret; |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1283 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1284 | if (!dp->panel) { |
| 1285 | ret = exynos_dp_dt_parse_panel(dp); |
| 1286 | if (ret) |
| 1287 | return ret; |
| 1288 | } |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1289 | |
Damien Cassou | d913f36 | 2012-08-01 18:20:39 +0200 | [diff] [blame] | 1290 | dp->clock = devm_clk_get(&pdev->dev, "dp"); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1291 | if (IS_ERR(dp->clock)) { |
| 1292 | dev_err(&pdev->dev, "failed to get clock\n"); |
Jingoo Han | 4d10ecf8 | 2012-05-25 16:20:45 +0900 | [diff] [blame] | 1293 | return PTR_ERR(dp->clock); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1294 | } |
| 1295 | |
Jingoo Han | 37414fb | 2012-10-04 15:45:14 +0900 | [diff] [blame] | 1296 | clk_prepare_enable(dp->clock); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1297 | |
| 1298 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1299 | |
Thierry Reding | bc3bad1 | 2013-01-21 11:09:23 +0100 | [diff] [blame] | 1300 | dp->reg_base = devm_ioremap_resource(&pdev->dev, res); |
| 1301 | if (IS_ERR(dp->reg_base)) |
| 1302 | return PTR_ERR(dp->reg_base); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1303 | |
Andrew Bresticker | b8b5247 | 2014-04-22 04:09:10 +0530 | [diff] [blame] | 1304 | dp->hpd_gpio = of_get_named_gpio(dev->of_node, "samsung,hpd-gpio", 0); |
| 1305 | |
| 1306 | if (gpio_is_valid(dp->hpd_gpio)) { |
| 1307 | /* |
| 1308 | * Set up the hotplug GPIO from the device tree as an interrupt. |
| 1309 | * Simply specifying a different interrupt in the device tree |
| 1310 | * doesn't work since we handle hotplug rather differently when |
| 1311 | * using a GPIO. We also need the actual GPIO specifier so |
| 1312 | * that we can get the current state of the GPIO. |
| 1313 | */ |
| 1314 | ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN, |
| 1315 | "hpd_gpio"); |
| 1316 | if (ret) { |
| 1317 | dev_err(&pdev->dev, "failed to get hpd gpio\n"); |
| 1318 | return ret; |
| 1319 | } |
| 1320 | dp->irq = gpio_to_irq(dp->hpd_gpio); |
| 1321 | irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; |
| 1322 | } else { |
| 1323 | dp->hpd_gpio = -ENODEV; |
| 1324 | dp->irq = platform_get_irq(pdev, 0); |
| 1325 | irq_flags = 0; |
| 1326 | } |
| 1327 | |
Sean Paul | 1cefc1d | 2012-10-31 23:21:00 +0000 | [diff] [blame] | 1328 | if (dp->irq == -ENXIO) { |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1329 | dev_err(&pdev->dev, "failed to get irq\n"); |
Damien Cassou | d913f36 | 2012-08-01 18:20:39 +0200 | [diff] [blame] | 1330 | return -ENODEV; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1331 | } |
| 1332 | |
Sean Paul | 784fa9a | 2012-11-09 13:55:08 +0900 | [diff] [blame] | 1333 | INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug); |
| 1334 | |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1335 | exynos_dp_phy_init(dp); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1336 | |
| 1337 | exynos_dp_init_dp(dp); |
| 1338 | |
Andrew Bresticker | b8b5247 | 2014-04-22 04:09:10 +0530 | [diff] [blame] | 1339 | ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, |
| 1340 | irq_flags, "exynos-dp", dp); |
Ajay Kumar | 22ce19c | 2012-11-09 13:59:09 +0900 | [diff] [blame] | 1341 | if (ret) { |
| 1342 | dev_err(&pdev->dev, "failed to request irq\n"); |
| 1343 | return ret; |
| 1344 | } |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1345 | disable_irq(dp->irq); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1346 | |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1347 | dp->drm_dev = drm_dev; |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1348 | |
| 1349 | platform_set_drvdata(pdev, &exynos_dp_display); |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1350 | |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1351 | return exynos_drm_create_enc_conn(drm_dev, &exynos_dp_display); |
| 1352 | } |
| 1353 | |
| 1354 | static void exynos_dp_unbind(struct device *dev, struct device *master, |
| 1355 | void *data) |
| 1356 | { |
| 1357 | struct exynos_drm_display *display = dev_get_drvdata(dev); |
| 1358 | struct exynos_dp_device *dp = display->ctx; |
| 1359 | struct drm_encoder *encoder = dp->encoder; |
| 1360 | |
| 1361 | exynos_dp_dpms(display, DRM_MODE_DPMS_OFF); |
| 1362 | |
Andrzej Hajda | 7c61b1e | 2014-09-09 15:16:12 +0200 | [diff] [blame^] | 1363 | exynos_dp_connector_destroy(&dp->connector); |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1364 | encoder->funcs->destroy(encoder); |
Inki Dae | f37cd5e | 2014-05-09 14:25:20 +0900 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | static const struct component_ops exynos_dp_ops = { |
| 1368 | .bind = exynos_dp_bind, |
| 1369 | .unbind = exynos_dp_unbind, |
| 1370 | }; |
| 1371 | |
| 1372 | static int exynos_dp_probe(struct platform_device *pdev) |
| 1373 | { |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1374 | struct device *dev = &pdev->dev; |
| 1375 | struct device_node *panel_node; |
| 1376 | struct exynos_dp_device *dp; |
Inki Dae | df5225b | 2014-05-29 18:28:02 +0900 | [diff] [blame] | 1377 | int ret; |
| 1378 | |
| 1379 | ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR, |
| 1380 | exynos_dp_display.type); |
| 1381 | if (ret) |
| 1382 | return ret; |
| 1383 | |
Ajay Kumar | 5f1dcd8 | 2014-07-31 23:12:14 +0530 | [diff] [blame] | 1384 | dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device), |
| 1385 | GFP_KERNEL); |
| 1386 | if (!dp) |
| 1387 | return -ENOMEM; |
| 1388 | |
| 1389 | panel_node = of_parse_phandle(dev->of_node, "panel", 0); |
| 1390 | if (panel_node) { |
| 1391 | dp->panel = of_drm_find_panel(panel_node); |
| 1392 | of_node_put(panel_node); |
| 1393 | if (!dp->panel) |
| 1394 | return -EPROBE_DEFER; |
| 1395 | } |
| 1396 | |
| 1397 | exynos_dp_display.ctx = dp; |
| 1398 | |
Inki Dae | df5225b | 2014-05-29 18:28:02 +0900 | [diff] [blame] | 1399 | ret = component_add(&pdev->dev, &exynos_dp_ops); |
| 1400 | if (ret) |
| 1401 | exynos_drm_component_del(&pdev->dev, |
| 1402 | EXYNOS_DEVICE_TYPE_CONNECTOR); |
| 1403 | |
| 1404 | return ret; |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1405 | } |
| 1406 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 1407 | static int exynos_dp_remove(struct platform_device *pdev) |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1408 | { |
Inki Dae | df5225b | 2014-05-29 18:28:02 +0900 | [diff] [blame] | 1409 | component_del(&pdev->dev, &exynos_dp_ops); |
| 1410 | exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR); |
| 1411 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | #ifdef CONFIG_PM_SLEEP |
| 1416 | static int exynos_dp_suspend(struct device *dev) |
| 1417 | { |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1418 | struct platform_device *pdev = to_platform_device(dev); |
| 1419 | struct exynos_drm_display *display = platform_get_drvdata(pdev); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1420 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1421 | exynos_dp_dpms(display, DRM_MODE_DPMS_OFF); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | static int exynos_dp_resume(struct device *dev) |
| 1426 | { |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1427 | struct platform_device *pdev = to_platform_device(dev); |
| 1428 | struct exynos_drm_display *display = platform_get_drvdata(pdev); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1429 | |
Sean Paul | 12f5ad6 | 2014-01-30 16:19:25 -0500 | [diff] [blame] | 1430 | exynos_dp_dpms(display, DRM_MODE_DPMS_ON); |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1431 | return 0; |
| 1432 | } |
| 1433 | #endif |
| 1434 | |
| 1435 | static const struct dev_pm_ops exynos_dp_pm_ops = { |
| 1436 | SET_SYSTEM_SLEEP_PM_OPS(exynos_dp_suspend, exynos_dp_resume) |
| 1437 | }; |
| 1438 | |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1439 | static const struct of_device_id exynos_dp_match[] = { |
| 1440 | { .compatible = "samsung,exynos5-dp" }, |
| 1441 | {}, |
| 1442 | }; |
Sjoerd Simons | bd024b8 | 2014-07-30 11:29:41 +0900 | [diff] [blame] | 1443 | MODULE_DEVICE_TABLE(of, exynos_dp_match); |
Ajay Kumar | c4e235c | 2012-10-13 05:48:00 +0900 | [diff] [blame] | 1444 | |
Sean Paul | 1417f10 | 2014-01-30 16:19:23 -0500 | [diff] [blame] | 1445 | struct platform_driver dp_driver = { |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1446 | .probe = exynos_dp_probe, |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 1447 | .remove = exynos_dp_remove, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1448 | .driver = { |
| 1449 | .name = "exynos-dp", |
| 1450 | .owner = THIS_MODULE, |
| 1451 | .pm = &exynos_dp_pm_ops, |
Jingoo Han | f9b1e01 | 2013-10-16 21:58:15 +0530 | [diff] [blame] | 1452 | .of_match_table = exynos_dp_match, |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1453 | }, |
| 1454 | }; |
| 1455 | |
Jingoo Han | e9474be | 2012-02-03 18:01:55 +0900 | [diff] [blame] | 1456 | MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); |
| 1457 | MODULE_DESCRIPTION("Samsung SoC DP Driver"); |
Jingoo Han | 8f589bb | 2014-06-03 21:46:11 +0900 | [diff] [blame] | 1458 | MODULE_LICENSE("GPL v2"); |