Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2007-8 Advanced Micro Devices, Inc. |
| 3 | * Copyright 2008 Red Hat Inc. |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 6 | * copy of this software and associated documentation files (the "Software"), |
| 7 | * to deal in the Software without restriction, including without limitation |
| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 9 | * and/or sell copies of the Software, and to permit persons to whom the |
| 10 | * Software is furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be included in |
| 13 | * all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 21 | * OTHER DEALINGS IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: Dave Airlie |
| 24 | * Alex Deucher |
| 25 | */ |
| 26 | #include "drmP.h" |
| 27 | #include "radeon_drm.h" |
| 28 | #include "radeon.h" |
| 29 | |
| 30 | #include "atom.h" |
| 31 | #include "atom-bits.h" |
| 32 | #include "drm_dp_helper.h" |
| 33 | |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 34 | /* move these to drm_dp_helper.c/h */ |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 35 | #define DP_LINK_CONFIGURATION_SIZE 9 |
| 36 | #define DP_LINK_STATUS_SIZE 6 |
| 37 | #define DP_DPCD_SIZE 8 |
| 38 | |
| 39 | static char *voltage_names[] = { |
| 40 | "0.4V", "0.6V", "0.8V", "1.2V" |
| 41 | }; |
| 42 | static char *pre_emph_names[] = { |
| 43 | "0dB", "3.5dB", "6dB", "9.5dB" |
| 44 | }; |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 45 | |
| 46 | static const int dp_clocks[] = { |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 47 | 54000, /* 1 lane, 1.62 Ghz */ |
| 48 | 90000, /* 1 lane, 2.70 Ghz */ |
| 49 | 108000, /* 2 lane, 1.62 Ghz */ |
| 50 | 180000, /* 2 lane, 2.70 Ghz */ |
| 51 | 216000, /* 4 lane, 1.62 Ghz */ |
| 52 | 360000, /* 4 lane, 2.70 Ghz */ |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 53 | }; |
| 54 | |
| 55 | static const int num_dp_clocks = sizeof(dp_clocks) / sizeof(int); |
| 56 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 57 | /* common helper functions */ |
| 58 | static int dp_lanes_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock) |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 59 | { |
| 60 | int i; |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 61 | u8 max_link_bw; |
| 62 | u8 max_lane_count; |
| 63 | |
| 64 | if (!dpcd) |
| 65 | return 0; |
| 66 | |
| 67 | max_link_bw = dpcd[DP_MAX_LINK_RATE]; |
| 68 | max_lane_count = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 69 | |
| 70 | switch (max_link_bw) { |
| 71 | case DP_LINK_BW_1_62: |
| 72 | default: |
| 73 | for (i = 0; i < num_dp_clocks; i++) { |
| 74 | if (i % 2) |
| 75 | continue; |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 76 | switch (max_lane_count) { |
| 77 | case 1: |
| 78 | if (i > 1) |
| 79 | return 0; |
| 80 | break; |
| 81 | case 2: |
| 82 | if (i > 3) |
| 83 | return 0; |
| 84 | break; |
| 85 | case 4: |
| 86 | default: |
| 87 | break; |
| 88 | } |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 89 | if (dp_clocks[i] > mode_clock) { |
| 90 | if (i < 2) |
| 91 | return 1; |
| 92 | else if (i < 4) |
| 93 | return 2; |
| 94 | else |
| 95 | return 4; |
| 96 | } |
| 97 | } |
| 98 | break; |
| 99 | case DP_LINK_BW_2_7: |
| 100 | for (i = 0; i < num_dp_clocks; i++) { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 101 | switch (max_lane_count) { |
| 102 | case 1: |
| 103 | if (i > 1) |
| 104 | return 0; |
| 105 | break; |
| 106 | case 2: |
| 107 | if (i > 3) |
| 108 | return 0; |
| 109 | break; |
| 110 | case 4: |
| 111 | default: |
| 112 | break; |
| 113 | } |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 114 | if (dp_clocks[i] > mode_clock) { |
| 115 | if (i < 2) |
| 116 | return 1; |
| 117 | else if (i < 4) |
| 118 | return 2; |
| 119 | else |
| 120 | return 4; |
| 121 | } |
| 122 | } |
| 123 | break; |
| 124 | } |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 129 | static int dp_link_clock_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock) |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 130 | { |
| 131 | int i; |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 132 | u8 max_link_bw; |
| 133 | u8 max_lane_count; |
| 134 | |
| 135 | if (!dpcd) |
| 136 | return 0; |
| 137 | |
| 138 | max_link_bw = dpcd[DP_MAX_LINK_RATE]; |
| 139 | max_lane_count = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 140 | |
| 141 | switch (max_link_bw) { |
| 142 | case DP_LINK_BW_1_62: |
| 143 | default: |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 144 | for (i = 0; i < num_dp_clocks; i++) { |
| 145 | if (i % 2) |
| 146 | continue; |
| 147 | switch (max_lane_count) { |
| 148 | case 1: |
| 149 | if (i > 1) |
| 150 | return 0; |
| 151 | break; |
| 152 | case 2: |
| 153 | if (i > 3) |
| 154 | return 0; |
| 155 | break; |
| 156 | case 4: |
| 157 | default: |
| 158 | break; |
| 159 | } |
| 160 | if (dp_clocks[i] > mode_clock) |
| 161 | return 162000; |
| 162 | } |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 163 | break; |
| 164 | case DP_LINK_BW_2_7: |
| 165 | for (i = 0; i < num_dp_clocks; i++) { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 166 | switch (max_lane_count) { |
| 167 | case 1: |
| 168 | if (i > 1) |
| 169 | return 0; |
| 170 | break; |
| 171 | case 2: |
| 172 | if (i > 3) |
| 173 | return 0; |
| 174 | break; |
| 175 | case 4: |
| 176 | default: |
| 177 | break; |
| 178 | } |
Alex Deucher | f92a8b6 | 2009-11-23 18:40:40 -0500 | [diff] [blame] | 179 | if (dp_clocks[i] > mode_clock) |
| 180 | return (i % 2) ? 270000 : 162000; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 187 | int dp_mode_valid(u8 dpcd[DP_DPCD_SIZE], int mode_clock) |
| 188 | { |
| 189 | int lanes = dp_lanes_for_mode_clock(dpcd, mode_clock); |
| 190 | int bw = dp_lanes_for_mode_clock(dpcd, mode_clock); |
| 191 | |
| 192 | if ((lanes == 0) || (bw == 0)) |
| 193 | return MODE_CLOCK_HIGH; |
| 194 | |
| 195 | return MODE_OK; |
| 196 | } |
| 197 | |
| 198 | static u8 dp_link_status(u8 link_status[DP_LINK_STATUS_SIZE], int r) |
| 199 | { |
| 200 | return link_status[r - DP_LANE0_1_STATUS]; |
| 201 | } |
| 202 | |
| 203 | static u8 dp_get_lane_status(u8 link_status[DP_LINK_STATUS_SIZE], |
| 204 | int lane) |
| 205 | { |
| 206 | int i = DP_LANE0_1_STATUS + (lane >> 1); |
| 207 | int s = (lane & 1) * 4; |
| 208 | u8 l = dp_link_status(link_status, i); |
| 209 | return (l >> s) & 0xf; |
| 210 | } |
| 211 | |
| 212 | static bool dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE], |
| 213 | int lane_count) |
| 214 | { |
| 215 | int lane; |
| 216 | u8 lane_status; |
| 217 | |
| 218 | for (lane = 0; lane < lane_count; lane++) { |
| 219 | lane_status = dp_get_lane_status(link_status, lane); |
| 220 | if ((lane_status & DP_LANE_CR_DONE) == 0) |
| 221 | return false; |
| 222 | } |
| 223 | return true; |
| 224 | } |
| 225 | |
| 226 | static bool dp_channel_eq_ok(u8 link_status[DP_LINK_STATUS_SIZE], |
| 227 | int lane_count) |
| 228 | { |
| 229 | u8 lane_align; |
| 230 | u8 lane_status; |
| 231 | int lane; |
| 232 | |
| 233 | lane_align = dp_link_status(link_status, |
| 234 | DP_LANE_ALIGN_STATUS_UPDATED); |
| 235 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) |
| 236 | return false; |
| 237 | for (lane = 0; lane < lane_count; lane++) { |
| 238 | lane_status = dp_get_lane_status(link_status, lane); |
| 239 | if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS) |
| 240 | return false; |
| 241 | } |
| 242 | return true; |
| 243 | } |
| 244 | |
| 245 | static u8 dp_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE], |
| 246 | int lane) |
| 247 | |
| 248 | { |
| 249 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); |
| 250 | int s = ((lane & 1) ? |
| 251 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : |
| 252 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); |
| 253 | u8 l = dp_link_status(link_status, i); |
| 254 | |
| 255 | return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; |
| 256 | } |
| 257 | |
| 258 | static u8 dp_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE], |
| 259 | int lane) |
| 260 | { |
| 261 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); |
| 262 | int s = ((lane & 1) ? |
| 263 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : |
| 264 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); |
| 265 | u8 l = dp_link_status(link_status, i); |
| 266 | |
| 267 | return ((l >> s) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; |
| 268 | } |
| 269 | |
| 270 | /* XXX fix me -- chip specific */ |
| 271 | #define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200 |
| 272 | static u8 dp_pre_emphasis_max(u8 voltage_swing) |
| 273 | { |
| 274 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
| 275 | case DP_TRAIN_VOLTAGE_SWING_400: |
| 276 | return DP_TRAIN_PRE_EMPHASIS_6; |
| 277 | case DP_TRAIN_VOLTAGE_SWING_600: |
| 278 | return DP_TRAIN_PRE_EMPHASIS_6; |
| 279 | case DP_TRAIN_VOLTAGE_SWING_800: |
| 280 | return DP_TRAIN_PRE_EMPHASIS_3_5; |
| 281 | case DP_TRAIN_VOLTAGE_SWING_1200: |
| 282 | default: |
| 283 | return DP_TRAIN_PRE_EMPHASIS_0; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | static void dp_get_adjust_train(u8 link_status[DP_LINK_STATUS_SIZE], |
| 288 | int lane_count, |
| 289 | u8 train_set[4]) |
| 290 | { |
| 291 | u8 v = 0; |
| 292 | u8 p = 0; |
| 293 | int lane; |
| 294 | |
| 295 | for (lane = 0; lane < lane_count; lane++) { |
| 296 | u8 this_v = dp_get_adjust_request_voltage(link_status, lane); |
| 297 | u8 this_p = dp_get_adjust_request_pre_emphasis(link_status, lane); |
| 298 | |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 299 | DRM_DEBUG("requested signal parameters: lane %d voltage %s pre_emph %s\n", |
| 300 | lane, |
| 301 | voltage_names[this_v >> DP_TRAIN_VOLTAGE_SWING_SHIFT], |
| 302 | pre_emph_names[this_p >> DP_TRAIN_PRE_EMPHASIS_SHIFT]); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 303 | |
| 304 | if (this_v > v) |
| 305 | v = this_v; |
| 306 | if (this_p > p) |
| 307 | p = this_p; |
| 308 | } |
| 309 | |
| 310 | if (v >= DP_VOLTAGE_MAX) |
| 311 | v = DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED; |
| 312 | |
| 313 | if (p >= dp_pre_emphasis_max(v)) |
| 314 | p = dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; |
| 315 | |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 316 | DRM_DEBUG("using signal parameters: voltage %s pre_emph %s\n", |
| 317 | voltage_names[(v & DP_TRAIN_VOLTAGE_SWING_MASK) >> DP_TRAIN_VOLTAGE_SWING_SHIFT], |
| 318 | pre_emph_names[(p & DP_TRAIN_PRE_EMPHASIS_MASK) >> DP_TRAIN_PRE_EMPHASIS_SHIFT]); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 319 | |
| 320 | for (lane = 0; lane < 4; lane++) |
| 321 | train_set[lane] = v | p; |
| 322 | } |
| 323 | |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 324 | union aux_channel_transaction { |
| 325 | PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION v1; |
| 326 | PROCESS_AUX_CHANNEL_TRANSACTION_PARAMETERS_V2 v2; |
| 327 | }; |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 328 | |
| 329 | /* radeon aux chan functions */ |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 330 | bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes, |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 331 | int num_bytes, u8 *read_byte, |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 332 | u8 read_buf_len, u8 delay) |
| 333 | { |
| 334 | struct drm_device *dev = chan->dev; |
| 335 | struct radeon_device *rdev = dev->dev_private; |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 336 | union aux_channel_transaction args; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 337 | int index = GetIndexIntoMasterTable(COMMAND, ProcessAuxChannelTransaction); |
| 338 | unsigned char *base; |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 339 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 340 | memset(&args, 0, sizeof(args)); |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 341 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 342 | base = (unsigned char *)rdev->mode_info.atom_context->scratch; |
| 343 | |
| 344 | memcpy(base, req_bytes, num_bytes); |
| 345 | |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 346 | args.v1.lpAuxRequest = 0; |
| 347 | args.v1.lpDataOut = 16; |
| 348 | args.v1.ucDataOutLen = 0; |
| 349 | args.v1.ucChannelID = chan->rec.i2c_id; |
| 350 | args.v1.ucDelay = delay / 10; |
| 351 | if (ASIC_IS_DCE4(rdev)) |
| 352 | args.v2.ucHPD_ID = chan->rec.hpd_id; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 353 | |
| 354 | atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); |
| 355 | |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 356 | if (args.v1.ucReplyStatus) { |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 357 | DRM_DEBUG("failed to get auxch %02x%02x %02x %02x 0x%02x %02x\n", |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 358 | req_bytes[1], req_bytes[0], req_bytes[2], req_bytes[3], |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 359 | chan->rec.i2c_id, args.v1.ucReplyStatus); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 360 | return false; |
| 361 | } |
| 362 | |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 363 | if (args.v1.ucDataOutLen && read_byte && read_buf_len) { |
| 364 | if (read_buf_len < args.v1.ucDataOutLen) { |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 365 | DRM_ERROR("Buffer to small for return answer %d %d\n", |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 366 | read_buf_len, args.v1.ucDataOutLen); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 367 | return false; |
| 368 | } |
| 369 | { |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 370 | int len = min(read_buf_len, args.v1.ucDataOutLen); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 371 | memcpy(read_byte, base + 16, len); |
| 372 | } |
| 373 | } |
| 374 | return true; |
| 375 | } |
| 376 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 377 | bool radeon_dp_aux_native_write(struct radeon_connector *radeon_connector, uint16_t address, |
| 378 | uint8_t send_bytes, uint8_t *send) |
| 379 | { |
| 380 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 381 | u8 msg[20]; |
| 382 | u8 msg_len, dp_msg_len; |
| 383 | bool ret; |
| 384 | |
| 385 | dp_msg_len = 4; |
| 386 | msg[0] = address; |
| 387 | msg[1] = address >> 8; |
| 388 | msg[2] = AUX_NATIVE_WRITE << 4; |
| 389 | dp_msg_len += send_bytes; |
| 390 | msg[3] = (dp_msg_len << 4) | (send_bytes - 1); |
| 391 | |
| 392 | if (send_bytes > 16) |
| 393 | return false; |
| 394 | |
| 395 | memcpy(&msg[4], send, send_bytes); |
| 396 | msg_len = 4 + send_bytes; |
| 397 | ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, NULL, 0, 0); |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | bool radeon_dp_aux_native_read(struct radeon_connector *radeon_connector, uint16_t address, |
| 402 | uint8_t delay, uint8_t expected_bytes, |
| 403 | uint8_t *read_p) |
| 404 | { |
| 405 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 406 | u8 msg[20]; |
| 407 | u8 msg_len, dp_msg_len; |
| 408 | bool ret = false; |
| 409 | msg_len = 4; |
| 410 | dp_msg_len = 4; |
| 411 | msg[0] = address; |
| 412 | msg[1] = address >> 8; |
| 413 | msg[2] = AUX_NATIVE_READ << 4; |
| 414 | msg[3] = (dp_msg_len) << 4; |
| 415 | msg[3] |= expected_bytes - 1; |
| 416 | |
| 417 | ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, read_p, expected_bytes, delay); |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | /* radeon dp functions */ |
Alex Deucher | 4143e91 | 2009-11-23 18:02:35 -0500 | [diff] [blame] | 422 | static u8 radeon_dp_encoder_service(struct radeon_device *rdev, int action, int dp_clock, |
| 423 | uint8_t ucconfig, uint8_t lane_num) |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 424 | { |
| 425 | DP_ENCODER_SERVICE_PARAMETERS args; |
| 426 | int index = GetIndexIntoMasterTable(COMMAND, DPEncoderService); |
| 427 | |
| 428 | memset(&args, 0, sizeof(args)); |
| 429 | args.ucLinkClock = dp_clock / 10; |
| 430 | args.ucConfig = ucconfig; |
| 431 | args.ucAction = action; |
| 432 | args.ucLaneNum = lane_num; |
| 433 | args.ucStatus = 0; |
| 434 | |
| 435 | atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); |
| 436 | return args.ucStatus; |
| 437 | } |
| 438 | |
Alex Deucher | 4143e91 | 2009-11-23 18:02:35 -0500 | [diff] [blame] | 439 | u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector) |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 440 | { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 441 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 442 | struct drm_device *dev = radeon_connector->base.dev; |
| 443 | struct radeon_device *rdev = dev->dev_private; |
| 444 | |
| 445 | return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0, |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 446 | dig_connector->dp_i2c_bus->rec.i2c_id, 0); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 447 | } |
| 448 | |
Alex Deucher | 9fa05c9 | 2009-11-27 13:01:46 -0500 | [diff] [blame] | 449 | bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector) |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 450 | { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 451 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 452 | u8 msg[25]; |
| 453 | int ret; |
| 454 | |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 455 | ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCD_REV, 0, 8, msg); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 456 | if (ret) { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 457 | memcpy(dig_connector->dpcd, msg, 8); |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 458 | { |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 459 | int i; |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 460 | DRM_DEBUG("DPCD: "); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 461 | for (i = 0; i < 8; i++) |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 462 | DRM_DEBUG("%02x ", msg[i]); |
| 463 | DRM_DEBUG("\n"); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 464 | } |
Alex Deucher | 9fa05c9 | 2009-11-27 13:01:46 -0500 | [diff] [blame] | 465 | return true; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 466 | } |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 467 | dig_connector->dpcd[0] = 0; |
Alex Deucher | 9fa05c9 | 2009-11-27 13:01:46 -0500 | [diff] [blame] | 468 | return false; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 469 | } |
| 470 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 471 | void radeon_dp_set_link_config(struct drm_connector *connector, |
| 472 | struct drm_display_mode *mode) |
| 473 | { |
| 474 | struct radeon_connector *radeon_connector; |
| 475 | struct radeon_connector_atom_dig *dig_connector; |
| 476 | |
Dave Airlie | 97b94cc | 2010-01-29 15:31:47 +1000 | [diff] [blame] | 477 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) && |
Alex Deucher | 196c58d | 2010-01-07 14:22:32 -0500 | [diff] [blame] | 478 | (connector->connector_type != DRM_MODE_CONNECTOR_eDP)) |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 479 | return; |
| 480 | |
| 481 | radeon_connector = to_radeon_connector(connector); |
| 482 | if (!radeon_connector->con_priv) |
| 483 | return; |
| 484 | dig_connector = radeon_connector->con_priv; |
| 485 | |
| 486 | dig_connector->dp_clock = |
| 487 | dp_link_clock_for_mode_clock(dig_connector->dpcd, mode->clock); |
| 488 | dig_connector->dp_lane_count = |
| 489 | dp_lanes_for_mode_clock(dig_connector->dpcd, mode->clock); |
| 490 | } |
| 491 | |
| 492 | int radeon_dp_mode_valid_helper(struct radeon_connector *radeon_connector, |
| 493 | struct drm_display_mode *mode) |
| 494 | { |
| 495 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 496 | |
| 497 | return dp_mode_valid(dig_connector->dpcd, mode->clock); |
| 498 | } |
| 499 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 500 | static bool atom_dp_get_link_status(struct radeon_connector *radeon_connector, |
| 501 | u8 link_status[DP_LINK_STATUS_SIZE]) |
| 502 | { |
| 503 | int ret; |
| 504 | ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS, 100, |
| 505 | DP_LINK_STATUS_SIZE, link_status); |
| 506 | if (!ret) { |
| 507 | DRM_ERROR("displayport link status failed\n"); |
| 508 | return false; |
| 509 | } |
| 510 | |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 511 | DRM_DEBUG("link status %02x %02x %02x %02x %02x %02x\n", |
| 512 | link_status[0], link_status[1], link_status[2], |
| 513 | link_status[3], link_status[4], link_status[5]); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 514 | return true; |
| 515 | } |
| 516 | |
Alex Deucher | d4877cf | 2009-12-04 16:56:37 -0500 | [diff] [blame] | 517 | bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector) |
| 518 | { |
| 519 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 520 | u8 link_status[DP_LINK_STATUS_SIZE]; |
| 521 | |
| 522 | if (!atom_dp_get_link_status(radeon_connector, link_status)) |
| 523 | return false; |
| 524 | if (dp_channel_eq_ok(link_status, dig_connector->dp_lane_count)) |
| 525 | return false; |
| 526 | return true; |
| 527 | } |
| 528 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 529 | static void dp_set_power(struct radeon_connector *radeon_connector, u8 power_state) |
| 530 | { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 531 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 532 | |
| 533 | if (dig_connector->dpcd[0] >= 0x11) { |
Alex Deucher | 1a66c95 | 2009-11-20 19:40:13 -0500 | [diff] [blame] | 534 | radeon_dp_aux_native_write(radeon_connector, DP_SET_POWER, 1, |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 535 | &power_state); |
| 536 | } |
| 537 | } |
| 538 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 539 | static void dp_set_downspread(struct radeon_connector *radeon_connector, u8 downspread) |
| 540 | { |
| 541 | radeon_dp_aux_native_write(radeon_connector, DP_DOWNSPREAD_CTRL, 1, |
| 542 | &downspread); |
| 543 | } |
| 544 | |
| 545 | static void dp_set_link_bw_lanes(struct radeon_connector *radeon_connector, |
| 546 | u8 link_configuration[DP_LINK_CONFIGURATION_SIZE]) |
| 547 | { |
| 548 | radeon_dp_aux_native_write(radeon_connector, DP_LINK_BW_SET, 2, |
| 549 | link_configuration); |
| 550 | } |
| 551 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 552 | static void dp_update_dpvs_emph(struct radeon_connector *radeon_connector, |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 553 | struct drm_encoder *encoder, |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 554 | u8 train_set[4]) |
| 555 | { |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 556 | struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv; |
| 557 | int i; |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 558 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 559 | for (i = 0; i < dig_connector->dp_lane_count; i++) |
| 560 | atombios_dig_transmitter_setup(encoder, |
| 561 | ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH, |
| 562 | i, train_set[i]); |
| 563 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 564 | radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_LANE0_SET, |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 565 | dig_connector->dp_lane_count, train_set); |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | static void dp_set_training(struct radeon_connector *radeon_connector, |
| 569 | u8 training) |
| 570 | { |
| 571 | radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_PATTERN_SET, |
| 572 | 1, &training); |
| 573 | } |
| 574 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 575 | void dp_link_train(struct drm_encoder *encoder, |
| 576 | struct drm_connector *connector) |
| 577 | { |
| 578 | struct drm_device *dev = encoder->dev; |
| 579 | struct radeon_device *rdev = dev->dev_private; |
| 580 | struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder); |
| 581 | struct radeon_encoder_atom_dig *dig; |
| 582 | struct radeon_connector *radeon_connector; |
| 583 | struct radeon_connector_atom_dig *dig_connector; |
| 584 | int enc_id = 0; |
| 585 | bool clock_recovery, channel_eq; |
| 586 | u8 link_status[DP_LINK_STATUS_SIZE]; |
| 587 | u8 link_configuration[DP_LINK_CONFIGURATION_SIZE]; |
| 588 | u8 tries, voltage; |
| 589 | u8 train_set[4]; |
| 590 | int i; |
| 591 | |
Dave Airlie | 97b94cc | 2010-01-29 15:31:47 +1000 | [diff] [blame] | 592 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) && |
Alex Deucher | 196c58d | 2010-01-07 14:22:32 -0500 | [diff] [blame] | 593 | (connector->connector_type != DRM_MODE_CONNECTOR_eDP)) |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 594 | return; |
| 595 | |
| 596 | if (!radeon_encoder->enc_priv) |
| 597 | return; |
| 598 | dig = radeon_encoder->enc_priv; |
| 599 | |
| 600 | radeon_connector = to_radeon_connector(connector); |
| 601 | if (!radeon_connector->con_priv) |
| 602 | return; |
| 603 | dig_connector = radeon_connector->con_priv; |
| 604 | |
Dave Airlie | f28cf33 | 2010-01-28 17:15:25 +1000 | [diff] [blame] | 605 | if (dig->dig_encoder) |
| 606 | enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER; |
| 607 | else |
| 608 | enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER; |
| 609 | if (dig_connector->linkb) |
| 610 | enc_id |= ATOM_DP_CONFIG_LINK_B; |
| 611 | else |
| 612 | enc_id |= ATOM_DP_CONFIG_LINK_A; |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 613 | |
| 614 | memset(link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); |
| 615 | if (dig_connector->dp_clock == 270000) |
| 616 | link_configuration[0] = DP_LINK_BW_2_7; |
| 617 | else |
| 618 | link_configuration[0] = DP_LINK_BW_1_62; |
| 619 | link_configuration[1] = dig_connector->dp_lane_count; |
| 620 | if (dig_connector->dpcd[0] >= 0x11) |
| 621 | link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
| 622 | |
| 623 | /* power up the sink */ |
| 624 | dp_set_power(radeon_connector, DP_SET_POWER_D0); |
| 625 | /* disable the training pattern on the sink */ |
| 626 | dp_set_training(radeon_connector, DP_TRAINING_PATTERN_DISABLE); |
| 627 | /* set link bw and lanes on the sink */ |
| 628 | dp_set_link_bw_lanes(radeon_connector, link_configuration); |
| 629 | /* disable downspread on the sink */ |
| 630 | dp_set_downspread(radeon_connector, 0); |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 631 | if (ASIC_IS_DCE4(rdev)) { |
| 632 | /* start training on the source */ |
| 633 | atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_START); |
| 634 | /* set training pattern 1 on the source */ |
| 635 | atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1); |
| 636 | } else { |
| 637 | /* start training on the source */ |
| 638 | radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_START, |
| 639 | dig_connector->dp_clock, enc_id, 0); |
| 640 | /* set training pattern 1 on the source */ |
| 641 | radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL, |
| 642 | dig_connector->dp_clock, enc_id, 0); |
| 643 | } |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 644 | |
| 645 | /* set initial vs/emph */ |
| 646 | memset(train_set, 0, 4); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 647 | udelay(400); |
| 648 | /* set training pattern 1 on the sink */ |
| 649 | dp_set_training(radeon_connector, DP_TRAINING_PATTERN_1); |
| 650 | |
Dave Airlie | 5fbfce7 | 2009-11-26 08:55:18 +1000 | [diff] [blame] | 651 | dp_update_dpvs_emph(radeon_connector, encoder, train_set); |
| 652 | |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 653 | /* clock recovery loop */ |
| 654 | clock_recovery = false; |
| 655 | tries = 0; |
| 656 | voltage = 0xff; |
| 657 | for (;;) { |
| 658 | udelay(100); |
| 659 | if (!atom_dp_get_link_status(radeon_connector, link_status)) |
| 660 | break; |
| 661 | |
| 662 | if (dp_clock_recovery_ok(link_status, dig_connector->dp_lane_count)) { |
| 663 | clock_recovery = true; |
| 664 | break; |
| 665 | } |
| 666 | |
| 667 | for (i = 0; i < dig_connector->dp_lane_count; i++) { |
| 668 | if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) |
| 669 | break; |
| 670 | } |
| 671 | if (i == dig_connector->dp_lane_count) { |
| 672 | DRM_ERROR("clock recovery reached max voltage\n"); |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { |
| 677 | ++tries; |
| 678 | if (tries == 5) { |
| 679 | DRM_ERROR("clock recovery tried 5 times\n"); |
| 680 | break; |
| 681 | } |
| 682 | } else |
| 683 | tries = 0; |
| 684 | |
| 685 | voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; |
| 686 | |
| 687 | /* Compute new train_set as requested by sink */ |
| 688 | dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set); |
| 689 | dp_update_dpvs_emph(radeon_connector, encoder, train_set); |
| 690 | } |
| 691 | if (!clock_recovery) |
| 692 | DRM_ERROR("clock recovery failed\n"); |
| 693 | else |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 694 | DRM_DEBUG("clock recovery at voltage %d pre-emphasis %d\n", |
| 695 | train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK, |
| 696 | (train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK) >> |
| 697 | DP_TRAIN_PRE_EMPHASIS_SHIFT); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 698 | |
| 699 | |
| 700 | /* set training pattern 2 on the sink */ |
| 701 | dp_set_training(radeon_connector, DP_TRAINING_PATTERN_2); |
| 702 | /* set training pattern 2 on the source */ |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 703 | if (ASIC_IS_DCE4(rdev)) |
| 704 | atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2); |
| 705 | else |
| 706 | radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL, |
| 707 | dig_connector->dp_clock, enc_id, 1); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 708 | |
| 709 | /* channel equalization loop */ |
| 710 | tries = 0; |
| 711 | channel_eq = false; |
| 712 | for (;;) { |
| 713 | udelay(400); |
| 714 | if (!atom_dp_get_link_status(radeon_connector, link_status)) |
| 715 | break; |
| 716 | |
| 717 | if (dp_channel_eq_ok(link_status, dig_connector->dp_lane_count)) { |
| 718 | channel_eq = true; |
| 719 | break; |
| 720 | } |
| 721 | |
| 722 | /* Try 5 times */ |
| 723 | if (tries > 5) { |
| 724 | DRM_ERROR("channel eq failed: 5 tries\n"); |
| 725 | break; |
| 726 | } |
| 727 | |
| 728 | /* Compute new train_set as requested by sink */ |
| 729 | dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set); |
| 730 | dp_update_dpvs_emph(radeon_connector, encoder, train_set); |
| 731 | |
| 732 | tries++; |
| 733 | } |
| 734 | |
| 735 | if (!channel_eq) |
| 736 | DRM_ERROR("channel eq failed\n"); |
| 737 | else |
Alex Deucher | 53c1e09 | 2009-11-27 13:14:37 -0500 | [diff] [blame] | 738 | DRM_DEBUG("channel eq at voltage %d pre-emphasis %d\n", |
| 739 | train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK, |
| 740 | (train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK) |
| 741 | >> DP_TRAIN_PRE_EMPHASIS_SHIFT); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 742 | |
| 743 | /* disable the training pattern on the sink */ |
Alex Deucher | bcc1c2a | 2010-01-12 17:54:34 -0500 | [diff] [blame^] | 744 | if (ASIC_IS_DCE4(rdev)) |
| 745 | atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE); |
| 746 | else |
| 747 | radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_COMPLETE, |
| 748 | dig_connector->dp_clock, enc_id, 0); |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 749 | |
| 750 | radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_COMPLETE, |
| 751 | dig_connector->dp_clock, enc_id, 0); |
| 752 | } |
| 753 | |
Dave Airlie | 746c1aa | 2009-12-08 07:07:28 +1000 | [diff] [blame] | 754 | int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
| 755 | uint8_t write_byte, uint8_t *read_byte) |
| 756 | { |
| 757 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
| 758 | struct radeon_i2c_chan *auxch = (struct radeon_i2c_chan *)adapter; |
| 759 | int ret = 0; |
| 760 | uint16_t address = algo_data->address; |
| 761 | uint8_t msg[5]; |
| 762 | uint8_t reply[2]; |
| 763 | int msg_len, dp_msg_len; |
| 764 | int reply_bytes; |
| 765 | |
| 766 | /* Set up the command byte */ |
| 767 | if (mode & MODE_I2C_READ) |
| 768 | msg[2] = AUX_I2C_READ << 4; |
| 769 | else |
| 770 | msg[2] = AUX_I2C_WRITE << 4; |
| 771 | |
| 772 | if (!(mode & MODE_I2C_STOP)) |
| 773 | msg[2] |= AUX_I2C_MOT << 4; |
| 774 | |
| 775 | msg[0] = address; |
| 776 | msg[1] = address >> 8; |
| 777 | |
| 778 | reply_bytes = 1; |
| 779 | |
| 780 | msg_len = 4; |
| 781 | dp_msg_len = 3; |
| 782 | switch (mode) { |
| 783 | case MODE_I2C_WRITE: |
| 784 | msg[4] = write_byte; |
| 785 | msg_len++; |
| 786 | dp_msg_len += 2; |
| 787 | break; |
| 788 | case MODE_I2C_READ: |
| 789 | dp_msg_len += 1; |
| 790 | break; |
| 791 | default: |
| 792 | break; |
| 793 | } |
| 794 | |
| 795 | msg[3] = (dp_msg_len) << 4; |
| 796 | ret = radeon_process_aux_ch(auxch, msg, msg_len, reply, reply_bytes, 0); |
| 797 | |
| 798 | if (ret) { |
| 799 | if (read_byte) |
| 800 | *read_byte = reply[0]; |
| 801 | return reply_bytes; |
| 802 | } |
| 803 | return -EREMOTEIO; |
| 804 | } |
Alex Deucher | 5801ead | 2009-11-24 13:32:59 -0500 | [diff] [blame] | 805 | |