Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2013, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions |
| 5 | * are met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer in |
| 10 | * the documentation and/or other materials provided with the |
| 11 | * distribution. |
| 12 | * * Neither the name of The Linux Foundation nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 19 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 20 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 22 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 23 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 24 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 26 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "edp.h" |
| 31 | |
| 32 | struct edp_aux_ctrl edpctrl; |
| 33 | |
| 34 | int edp_hpd_done = 0; |
| 35 | int edp_video_ready = 0; |
| 36 | |
| 37 | /* |
| 38 | * edid |
| 39 | */ |
| 40 | static char edid_hdr[8] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00}; |
| 41 | |
| 42 | |
| 43 | int edp_edid_buf_error(char *buf, int len) |
| 44 | { |
| 45 | char *bp; |
| 46 | int i; |
| 47 | char csum = 0; |
| 48 | int ret = 0; |
| 49 | |
| 50 | bp = buf; |
| 51 | if (len < 128) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 52 | dprintf(INFO, "%s: Error: len=%x\n", __func__, len); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 53 | return -1; |
| 54 | } |
| 55 | |
| 56 | for (i = 0; i < 128; i++) |
| 57 | csum += *bp++; |
| 58 | |
| 59 | if (csum != 0) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 60 | dprintf(INFO, "%s: Error: csum=%x\n", __func__, csum); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 61 | return -1; |
| 62 | } |
| 63 | |
| 64 | if (buf[1] != 0xff) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 65 | dprintf(INFO, "%s: Error: header\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | return ret; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | void edp_extract_edid_manufacturer(struct edp_edid *edid, char *buf) |
| 74 | { |
| 75 | char *bp; |
| 76 | char data; |
| 77 | |
| 78 | bp = &buf[8]; |
| 79 | data = *bp & 0x7f; |
| 80 | data >>= 2; |
| 81 | edid->id_name[0] = 'A' + data - 1; |
| 82 | data = *bp & 0x03; |
| 83 | data <<= 3; |
| 84 | bp++; |
| 85 | data |= (*bp >> 5); |
| 86 | edid->id_name[1] = 'A' + data - 1; |
| 87 | data = *bp & 0x1f; |
| 88 | edid->id_name[2] = 'A' + data - 1; |
| 89 | edid->id_name[3] = 0; |
| 90 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 91 | dprintf(SPEW, "%s: edid manufacturer = %s", __func__, edid->id_name); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | void edp_extract_edid_product(struct edp_edid *edid, char *buf) |
| 95 | { |
| 96 | char *bp; |
| 97 | int data; |
| 98 | |
| 99 | bp = &buf[0x0a]; |
| 100 | data = *bp; |
| 101 | edid->id_product = *bp++; |
| 102 | edid->id_product &= 0x0ff; |
| 103 | data = *bp & 0x0ff; |
| 104 | data <<= 8; |
| 105 | edid->id_product |= data; |
| 106 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 107 | dprintf(SPEW, "%s: edid product = 0x%x\n", __func__, edid->id_product); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | void edp_extract_edid_version(struct edp_edid *edid, char *buf) |
| 111 | { |
| 112 | edid->version = buf[0x12]; |
| 113 | edid->revision = buf[0x13]; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 114 | dprintf(SPEW, "%s: edid version = %d.%d", __func__, |
| 115 | edid->version, edid->revision); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 116 | }; |
| 117 | |
| 118 | void edp_extract_edid_ext_block_cnt(struct edp_edid *edid, char *buf) |
| 119 | { |
| 120 | edid->ext_block_cnt = buf[0x7e]; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 121 | dprintf(SPEW, "%s: edid extension = %d", __func__, edid->ext_block_cnt); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | void edp_extract_edid_video_support(struct edp_edid *edid, char *buf) |
| 125 | { |
| 126 | char *bp; |
| 127 | |
| 128 | bp = &buf[0x14]; |
| 129 | if (*bp & 0x80) { |
| 130 | edid->video_intf = *bp & 0x0f; |
| 131 | /* 6, 8, 10, 12, 14 and 16 bit per component */ |
| 132 | edid->color_depth = ((*bp & 0x70) >> 4); /* color bit depth */ |
| 133 | if (edid->color_depth) { |
| 134 | edid->color_depth *= 2; |
| 135 | edid->color_depth += 4; |
| 136 | } |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 137 | dprintf(SPEW, "%s: Digital Video intf=%d color_depth=%d\n", |
| 138 | __func__, edid->video_intf, edid->color_depth); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 139 | return; |
| 140 | } |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 141 | dprintf(INFO, "%s: Error, Analog video interface", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 142 | }; |
| 143 | |
| 144 | void edp_extract_edid_feature(struct edp_edid *edid, char *buf) |
| 145 | { |
| 146 | char *bp; |
| 147 | char data; |
| 148 | |
| 149 | bp = &buf[0x18]; |
| 150 | data = *bp; |
| 151 | data &= 0xe0; |
| 152 | data >>= 5; |
| 153 | if (data == 0x01) |
| 154 | edid->dpm = 1; /* display power management */ |
| 155 | |
| 156 | if (edid->video_intf) { |
| 157 | if (*bp & 0x80) { |
| 158 | /* RGB 4:4:4, YcrCb 4:4:4 and YCrCb 4:2:2 */ |
| 159 | edid->color_format = *bp & 0x18; |
| 160 | edid->color_format >>= 3; |
| 161 | } |
| 162 | } |
| 163 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 164 | dprintf(SPEW, "%s: edid dpm=%d color_format=%d", |
| 165 | __func__, edid->dpm, edid->color_format); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 166 | }; |
| 167 | |
| 168 | void edp_extract_edid_detailed_timing_description(struct edp_edid *edid, |
| 169 | char *buf) |
| 170 | { |
| 171 | char *bp; |
| 172 | int data; |
| 173 | struct display_timing_desc *dp; |
| 174 | |
| 175 | dp = &edid->timing[0]; |
| 176 | |
| 177 | bp = &buf[0x36]; |
| 178 | dp->pclk = 0; |
| 179 | dp->pclk = *bp++; /* byte 0x36 */ |
| 180 | dp->pclk |= (*bp++ << 8); /* byte 0x37 */ |
| 181 | |
| 182 | dp->h_addressable = *bp++; /* byte 0x38 */ |
| 183 | |
| 184 | if (dp->pclk == 0 && dp->h_addressable == 0) |
| 185 | return; /* Not detailed timing definition */ |
| 186 | |
| 187 | dp->pclk *= 10000; |
| 188 | |
| 189 | dp->h_blank = *bp++;/* byte 0x39 */ |
| 190 | data = *bp & 0xf0; /* byte 0x3A */ |
| 191 | data <<= 4; |
| 192 | dp->h_addressable |= data; |
| 193 | |
| 194 | data = *bp++ & 0x0f; |
| 195 | data <<= 8; |
| 196 | dp->h_blank |= data; |
| 197 | |
| 198 | dp->v_addressable = *bp++; /* byte 0x3B */ |
| 199 | dp->v_blank = *bp++; /* byte 0x3C */ |
| 200 | data = *bp & 0xf0; /* byte 0x3D */ |
| 201 | data <<= 4; |
| 202 | dp->v_addressable |= data; |
| 203 | |
| 204 | data = *bp++ & 0x0f; |
| 205 | data <<= 8; |
| 206 | dp->v_blank |= data; |
| 207 | |
| 208 | dp->h_fporch = *bp++; /* byte 0x3E */ |
| 209 | dp->h_sync_pulse = *bp++; /* byte 0x3F */ |
| 210 | |
| 211 | dp->v_fporch = *bp & 0x0f0; /* byte 0x40 */ |
| 212 | dp->v_fporch >>= 4; |
| 213 | dp->v_sync_pulse = *bp & 0x0f; |
| 214 | |
| 215 | bp++; |
| 216 | data = *bp & 0xc0; /* byte 0x41 */ |
| 217 | data <<= 2; |
| 218 | dp->h_fporch |= data; |
| 219 | |
| 220 | data = *bp & 0x30; |
| 221 | data <<= 4; |
| 222 | dp->h_sync_pulse |= data; |
| 223 | |
| 224 | data = *bp & 0x0c; |
| 225 | data <<= 2; |
| 226 | dp->v_fporch |= data; |
| 227 | |
| 228 | data = *bp & 0x03; |
| 229 | data <<= 4; |
| 230 | dp->v_sync_pulse |= data; |
| 231 | |
| 232 | bp++; |
| 233 | dp->width_mm = *bp++; /* byte 0x42 */ |
| 234 | dp->height_mm = *bp++; /* byte 0x43 */ |
| 235 | data = *bp & 0x0f0; /* byte 0x44 */ |
| 236 | data <<= 4; |
| 237 | dp->width_mm |= data; |
| 238 | data = *bp & 0x0f; |
| 239 | data <<= 8; |
| 240 | dp->height_mm |= data; |
| 241 | |
| 242 | bp++; |
| 243 | dp->h_border = *bp++; /* byte 0x45 */ |
| 244 | dp->v_border = *bp++; /* byte 0x46 */ |
| 245 | |
| 246 | dp->interlaced = *bp & 0x80; /* byte 0x47 */ |
| 247 | |
| 248 | dp->stereo = *bp & 0x60; |
| 249 | dp->stereo >>= 5; |
| 250 | |
| 251 | data = *bp & 0x1e; /* bit 4,3,2 1*/ |
| 252 | data >>= 1; |
| 253 | dp->sync_type = data & 0x08; |
| 254 | dp->sync_type >>= 3; /* analog or digital */ |
| 255 | if (dp->sync_type) { |
| 256 | dp->sync_separate = data & 0x04; |
| 257 | dp->sync_separate >>= 2; |
| 258 | if (dp->sync_separate) { |
| 259 | if (data & 0x02) |
| 260 | dp->vsync_pol = 1; /* positive */ |
| 261 | else |
| 262 | dp->vsync_pol = 0;/* negative */ |
| 263 | |
| 264 | if (data & 0x01) |
| 265 | dp->hsync_pol = 1; /* positive */ |
| 266 | else |
| 267 | dp->hsync_pol = 0; /* negative */ |
| 268 | } |
| 269 | } |
| 270 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 271 | dprintf(SPEW, "%s: pixel_clock = %d\n", __func__, dp->pclk); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 272 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 273 | dprintf(SPEW, "%s: horizontal=%d, blank=%d, porch=%d, sync=%d\n", |
| 274 | __func__, dp->h_addressable, dp->h_blank, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 275 | dp->h_fporch, dp->h_sync_pulse); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 276 | dprintf(SPEW, "%s: vertical=%d, blank=%d, porch=%d, vsync=%d\n", |
| 277 | __func__, dp->v_addressable, dp->v_blank, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 278 | dp->v_fporch, dp->v_sync_pulse); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 279 | dprintf(SPEW, "%s: panel size in mm, width=%d height=%d\n", |
| 280 | __func__, dp->width_mm, dp->height_mm); |
| 281 | dprintf(SPEW, "%s: panel border horizontal=%d vertical=%d\n", |
| 282 | __func__, dp->h_border, dp->v_border); |
| 283 | dprintf(SPEW, "%s: interlaced=%d stereo=%d sync_type=%d sync_sep=%d\n", |
| 284 | __func__, dp->interlaced, dp->stereo, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 285 | dp->sync_type, dp->sync_separate); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 286 | dprintf(SPEW, "%s: polarity vsync=%d, hsync=%d\n", |
| 287 | __func__, dp->vsync_pol, dp->hsync_pol); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | |
| 291 | /* |
| 292 | * EDID structure can be found in VESA standart here: |
| 293 | * http://read.pudn.com/downloads110/ebook/456020/E-EDID%20Standard.pdf |
| 294 | * |
| 295 | * following table contains default edid |
| 296 | * static char edid_raw_data[128] = { |
| 297 | * 0, 255, 255, 255, 255, 255, 255, 0, |
| 298 | * 6, 175, 93, 48, 0, 0, 0, 0, 0, 22, |
| 299 | * 1, 4, |
| 300 | * 149, 26, 14, 120, 2, |
| 301 | * 164, 21,158, 85, 78, 155, 38, 15, 80, 84, |
| 302 | * 0, 0, 0, |
| 303 | * 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 304 | * 29, 54, 128, 160, 112, 56, 30, 64, 48, 32, 142, 0, 0, 144, 16,0,0,24, |
| 305 | * 19, 36, 128, 160, 112, 56, 30, 64, 48, 32, 142, 0, 0, 144, 16,0,0,24, |
| 306 | * 0, 0, 0, 254, 0, 65, 85, 79, 10, 32, 32, 32, 32, 32, 32, 32, 32, 32, |
| 307 | * 0, 0, 0, 254, 0, 66, 49, 49, 54, 72, 65, 78, 48, 51, 46, 48, 32, 10, |
| 308 | * 0, 75 }; |
| 309 | */ |
| 310 | |
| 311 | static int edp_aux_chan_ready(struct edp_aux_ctrl *ep) |
| 312 | { |
| 313 | int cnt, ret; |
| 314 | char data = 0; |
| 315 | |
| 316 | cnt = 5; |
| 317 | while(cnt--) { |
| 318 | ret = edp_aux_write_buf(ep, 0x50, &data, 1, 1); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 319 | dprintf(SPEW, "%s: ret=%d\n", __func__, ret); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 320 | if (ret >= 0) |
| 321 | break; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 322 | dprintf(INFO, "%s: failed in write\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 323 | mdelay(100); |
| 324 | } |
| 325 | |
| 326 | if (cnt == 0) |
| 327 | return 0; |
| 328 | |
| 329 | return 1; |
| 330 | } |
| 331 | |
| 332 | static int edp_sink_edid_read(struct edp_aux_ctrl *ep, int block) |
| 333 | { |
| 334 | struct edp_buf *rp; |
| 335 | int cnt, rlen; |
| 336 | char data = 0; |
| 337 | int ret = 0; |
| 338 | |
| 339 | start: |
| 340 | cnt = 5; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 341 | dprintf(SPEW, "%s: cnt=%d\n", __func__, cnt); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 342 | /* need to write a dummy byte before read edid */ |
| 343 | while(cnt--) { |
| 344 | ret = edp_aux_write_buf(ep, 0x50, &data, 1, 1); |
| 345 | if (ret >= 0) |
| 346 | break; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 347 | dprintf(INFO, "%s: failed in write\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 348 | mdelay(100); |
| 349 | } |
| 350 | |
| 351 | if (cnt == 0) |
| 352 | return -1; |
| 353 | |
| 354 | rlen = edp_aux_read_buf(ep, 0x50, 128, 1); |
| 355 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 356 | dprintf(SPEW, "%s: rlen=%d\n", rlen, __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 357 | |
| 358 | if (rlen < 0) |
| 359 | goto start; |
| 360 | |
| 361 | rp = &ep->rxp; |
| 362 | if (edp_edid_buf_error(rp->data, rp->len)) |
| 363 | goto start; |
| 364 | |
| 365 | edp_extract_edid_manufacturer(&ep->edid, rp->data); |
| 366 | edp_extract_edid_product(&ep->edid, rp->data); |
| 367 | edp_extract_edid_version(&ep->edid, rp->data); |
| 368 | edp_extract_edid_ext_block_cnt(&ep->edid, rp->data); |
| 369 | edp_extract_edid_video_support(&ep->edid, rp->data); |
| 370 | edp_extract_edid_feature(&ep->edid, rp->data); |
| 371 | edp_extract_edid_detailed_timing_description(&ep->edid, rp->data); |
| 372 | |
| 373 | return 128; |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * Converts from EDID struct to msm_panel_info |
| 378 | */ |
| 379 | void edp_edid2pinfo(struct msm_panel_info *pinfo) |
| 380 | { |
| 381 | struct display_timing_desc *dp; |
| 382 | |
| 383 | dp = &edpctrl.edid.timing[0]; |
| 384 | |
| 385 | pinfo->clk_rate = dp->pclk; |
| 386 | |
| 387 | dprintf(SPEW, "%s: pclk=%d\n", __func__, pinfo->clk_rate); |
| 388 | |
| 389 | pinfo->xres = dp->h_addressable + dp->h_border * 2; |
| 390 | pinfo->yres = dp->v_addressable + dp->v_border * 2; |
| 391 | |
| 392 | pinfo->lcdc.h_back_porch = dp->h_blank - dp->h_fporch \ |
| 393 | - dp->h_sync_pulse; |
| 394 | pinfo->lcdc.h_front_porch = dp->h_fporch; |
| 395 | pinfo->lcdc.h_pulse_width = dp->h_sync_pulse; |
| 396 | |
| 397 | pinfo->lcdc.v_back_porch = dp->v_blank - dp->v_fporch \ |
| 398 | - dp->v_sync_pulse; |
| 399 | pinfo->lcdc.v_front_porch = dp->v_fporch; |
| 400 | pinfo->lcdc.v_pulse_width = dp->v_sync_pulse; |
| 401 | |
| 402 | pinfo->type = EDP_PANEL; |
| 403 | pinfo->wait_cycle = 0; |
| 404 | pinfo->bpp = 24; |
| 405 | |
| 406 | pinfo->lcdc.border_clr = 0; /* black */ |
| 407 | pinfo->lcdc.underflow_clr = 0xff; /* blue */ |
| 408 | pinfo->lcdc.hsync_skew = 0; |
| 409 | } |
| 410 | |
| 411 | void edp_cap2pinfo(struct msm_panel_info *pinfo) |
| 412 | { |
| 413 | struct dpcd_cap *cap; |
| 414 | |
| 415 | cap = &edpctrl.dpcd; |
| 416 | |
| 417 | pinfo->edp.max_lane_count = cap->max_lane_count; |
| 418 | pinfo->edp.max_link_clk = cap->max_link_rate; |
| 419 | |
| 420 | dprintf(SPEW, "%s: clk=%d lane=%d\n", __func__, |
| 421 | pinfo->edp.max_lane_count, pinfo->edp.max_link_clk); |
| 422 | } |
| 423 | |
| 424 | static void edp_sink_capability_read(struct edp_aux_ctrl *ep, |
| 425 | int len) |
| 426 | { |
| 427 | char *bp; |
| 428 | char data; |
| 429 | struct dpcd_cap *cap; |
| 430 | struct edp_buf *rp; |
| 431 | int rlen; |
| 432 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 433 | dprintf(SPEW, "%s:\n",__func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 434 | |
| 435 | rlen = edp_aux_read_buf(ep, 0, len, 0); |
| 436 | if (rlen <= 0) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 437 | dprintf(INFO, "%s: edp aux read failed\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 438 | return; |
| 439 | } |
| 440 | rp = &ep->rxp; |
| 441 | cap = &ep->dpcd; |
| 442 | bp = rp->data; |
| 443 | |
| 444 | data = *bp++; /* byte 0 */ |
| 445 | cap->major = (data >> 4) & 0x0f; |
| 446 | cap->minor = data & 0x0f; |
| 447 | if (--rlen <= 0) |
| 448 | return; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 449 | dprintf(SPEW, "%s: version: %d.%d\n", __func__, cap->major, cap->minor); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 450 | |
| 451 | data = *bp++; /* byte 1 */ |
| 452 | /* 162, 270 and 540 MB, symbol rate, NOT bit rate */ |
| 453 | cap->max_link_rate = data * 27; |
| 454 | if (--rlen <= 0) |
| 455 | return; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 456 | dprintf(SPEW, "%s: link_rate=%d\n", __func__, cap->max_link_rate); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 457 | |
| 458 | data = *bp++; /* byte 2 */ |
| 459 | if (data & BIT(7)) |
| 460 | cap->flags |= DPCD_ENHANCED_FRAME; |
| 461 | if (data & 0x40) |
| 462 | cap->flags |= DPCD_TPS3; |
| 463 | data &= 0x0f; |
| 464 | cap->max_lane_count = data; |
| 465 | if (--rlen <= 0) |
| 466 | return; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 467 | dprintf(SPEW, "%s: lane_count=%d\n", __func__, cap->max_lane_count); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 468 | |
| 469 | data = *bp++; /* byte 3 */ |
| 470 | if (data & BIT(0)) { |
| 471 | cap->flags |= DPCD_MAX_DOWNSPREAD_0_5; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 472 | dprintf(SPEW, "%s: max_downspread\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | if (data & BIT(6)) { |
| 476 | cap->flags |= DPCD_NO_AUX_HANDSHAKE; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 477 | dprintf(SPEW, "%s: NO Link Training\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 478 | } |
| 479 | if (--rlen <= 0) |
| 480 | return; |
| 481 | |
| 482 | data = *bp++; /* byte 4 */ |
| 483 | cap->num_rx_port = (data & BIT(0)) + 1; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 484 | dprintf(SPEW, "%s: rx_ports=%d", __func__, cap->num_rx_port); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 485 | if (--rlen <= 0) |
| 486 | return; |
| 487 | |
| 488 | bp += 3; /* skip 5, 6 and 7 */ |
| 489 | rlen -= 3; |
| 490 | if (rlen <= 0) |
| 491 | return; |
| 492 | |
| 493 | data = *bp++; /* byte 8 */ |
| 494 | if (data & BIT(1)) { |
| 495 | cap->flags |= DPCD_PORT_0_EDID_PRESENTED; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 496 | dprintf(SPEW, "%s: edid presented\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 497 | } |
| 498 | if (--rlen <= 0) |
| 499 | return; |
| 500 | |
| 501 | data = *bp++; /* byte 9 */ |
| 502 | cap->rx_port0_buf_size = (data + 1) * 32; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 503 | dprintf(SPEW, "%s: lane_buf_size=%d", __func__, cap->rx_port0_buf_size); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 504 | if (--rlen <= 0) |
| 505 | return; |
| 506 | |
| 507 | bp += 2; /* skip 10, 11 port1 capability */ |
| 508 | rlen -= 2; |
| 509 | if (rlen <= 0) |
| 510 | return; |
| 511 | |
| 512 | data = *bp++; /* byte 12 */ |
| 513 | cap->i2c_speed_ctrl = data; |
| 514 | if (cap->i2c_speed_ctrl > 0) |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 515 | dprintf(SPEW, "%s: i2c_rate=%d", __func__, cap->i2c_speed_ctrl); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 516 | if (--rlen <= 0) |
| 517 | return; |
| 518 | |
| 519 | data = *bp++; /* byte 13 */ |
| 520 | cap->scrambler_reset = data & BIT(0); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 521 | dprintf(SPEW, "%s: scrambler_reset=%d\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 522 | cap->scrambler_reset); |
| 523 | |
| 524 | cap->enhanced_frame = data & BIT(1); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 525 | dprintf(SPEW, "%s: enhanced_framing=%d\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 526 | cap->enhanced_frame); |
| 527 | if (--rlen <= 0) |
| 528 | return; |
| 529 | |
| 530 | data = *bp++; /* byte 14 */ |
| 531 | if (data == 0) |
| 532 | cap->training_read_interval = 100; /* us */ |
| 533 | else |
| 534 | cap->training_read_interval = 4000 * data; /* us */ |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 535 | dprintf(SPEW, "%s: training_interval=%d\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 536 | cap->training_read_interval); |
| 537 | } |
| 538 | |
| 539 | static void edp_link_status_read(struct edp_aux_ctrl *ep, int len) |
| 540 | { |
| 541 | char *bp; |
| 542 | char data; |
| 543 | struct dpcd_link_status *sp; |
| 544 | struct edp_buf *rp; |
| 545 | int rlen; |
| 546 | |
| 547 | |
| 548 | /* skip byte 0x200 and 0x201 */ |
| 549 | rlen = edp_aux_read_buf(ep, 0x202, len, 0); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 550 | dprintf(SPEW, "%s: rlen=%d\n", __func__, rlen); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 551 | if (rlen <= 0) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 552 | dprintf(SPEW, "%s: edp aux read failed\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 553 | return; |
| 554 | } |
| 555 | rp = &ep->rxp; |
| 556 | bp = rp->data; |
| 557 | sp = &ep->link_status; |
| 558 | |
| 559 | data = *bp++; /* byte 0x202 */ |
| 560 | sp->lane_01_status = data; /* lane 0, 1 */ |
| 561 | if (--rlen <= 0) |
| 562 | return; |
| 563 | |
| 564 | data = *bp++; /* byte 0x203 */ |
| 565 | sp->lane_23_status = data; /* lane 2, 3 */ |
| 566 | if (--rlen <= 0) |
| 567 | return; |
| 568 | |
| 569 | data = *bp++; /* byte 0x204 */ |
| 570 | sp->interlane_align_done = (data & BIT(0)); |
| 571 | sp->downstream_port_status_changed = (data & BIT(6)); |
| 572 | sp->link_status_updated = (data & BIT(7)); |
| 573 | if (--rlen <= 0) |
| 574 | return; |
| 575 | |
| 576 | data = *bp++; /* byte 0x205 */ |
| 577 | sp->port_0_in_sync = (data & BIT(0)); |
| 578 | sp->port_1_in_sync = (data & BIT(1)); |
| 579 | if (--rlen <= 0) |
| 580 | return; |
| 581 | |
| 582 | data = *bp++; /* byte 0x206 */ |
| 583 | sp->req_voltage_swing[0] = data & 0x03; |
| 584 | data >>= 2; |
| 585 | sp->req_pre_emphasis[0] = data & 0x03; |
| 586 | data >>= 2; |
| 587 | sp->req_voltage_swing[1] = data & 0x03; |
| 588 | data >>= 2; |
| 589 | sp->req_pre_emphasis[1] = data & 0x03; |
| 590 | if (--rlen <= 0) |
| 591 | return; |
| 592 | |
| 593 | data = *bp++; /* byte 0x207 */ |
| 594 | sp->req_voltage_swing[2] = data & 0x03; |
| 595 | data >>= 2; |
| 596 | sp->req_pre_emphasis[2] = data & 0x03; |
| 597 | data >>= 2; |
| 598 | sp->req_voltage_swing[3] = data & 0x03; |
| 599 | data >>= 2; |
| 600 | sp->req_pre_emphasis[3] = data & 0x03; |
| 601 | |
| 602 | bp = rp->data; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 603 | dprintf(SPEW, "%s: %x %x %x %x %x %x\n", __func__, *bp, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 604 | *(bp+1), *(bp+2), *(bp+3), *(bp+4), *(bp+5)); |
| 605 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 606 | dprintf(SPEW, "%s: align=%d v=%d p=%d\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 607 | sp->interlane_align_done, sp->req_voltage_swing[0], sp->req_pre_emphasis[0]); |
| 608 | } |
| 609 | |
| 610 | |
| 611 | static int edp_cap_lane_rate_set(struct edp_aux_ctrl *ep) |
| 612 | { |
| 613 | char buf[4]; |
| 614 | int len = 0; |
| 615 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 616 | dprintf(SPEW, "%s: bw=%x lane=%d\n", __func__, |
| 617 | ep->link_rate, ep->lane_cnt); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 618 | buf[0] = ep->link_rate; |
| 619 | buf[1] = ep->lane_cnt; |
| 620 | len = edp_aux_write_buf(ep, 0x100, buf, 2, 0); |
| 621 | |
| 622 | return len; |
| 623 | } |
| 624 | |
| 625 | static int edp_lane_set_write(struct edp_aux_ctrl *ep, int voltage_level, |
| 626 | int pre_emphasis_level) |
| 627 | { |
| 628 | int i; |
| 629 | char buf[4]; |
| 630 | |
| 631 | |
| 632 | if (voltage_level >= DPCD_LINK_VOLTAGE_MAX) |
| 633 | voltage_level |= 0x04; |
| 634 | |
| 635 | if (pre_emphasis_level >= DPCD_LINK_PRE_EMPHASIS_MAX) |
| 636 | pre_emphasis_level |= 0x04; |
| 637 | |
| 638 | pre_emphasis_level <<= 3; |
| 639 | |
| 640 | for (i = 0; i < 4; i++) |
| 641 | buf[i] = voltage_level | pre_emphasis_level; |
| 642 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 643 | dprintf(SPEW, "%s: p|v=0x%x\n", __func__, voltage_level | pre_emphasis_level); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 644 | return edp_aux_write_buf(ep, 0x103, buf, 4, 0); |
| 645 | } |
| 646 | |
| 647 | static int edp_powerstate_write(struct edp_aux_ctrl *ep, |
| 648 | char powerstate) |
| 649 | { |
| 650 | return edp_aux_write_buf(ep, 0x600, &powerstate, 1, 0); |
| 651 | } |
| 652 | |
| 653 | static int edp_train_pattern_set_write(struct edp_aux_ctrl *ep, |
| 654 | int pattern) |
| 655 | { |
| 656 | char buf[4]; |
| 657 | |
| 658 | buf[0] = pattern; |
| 659 | return edp_aux_write_buf(ep, 0x102, buf, 1, 0); |
| 660 | } |
| 661 | |
| 662 | static int edp_sink_clock_recovery_done(struct edp_aux_ctrl *ep) |
| 663 | { |
| 664 | int mask; |
| 665 | int data; |
| 666 | |
| 667 | |
| 668 | if (ep->lane_cnt == 1) { |
| 669 | mask = 0x01; /* lane 0 */ |
| 670 | data = ep->link_status.lane_01_status; |
| 671 | } else if (ep->lane_cnt == 2) { |
| 672 | mask = 0x011; /*B lane 0, 1 */ |
| 673 | data = ep->link_status.lane_01_status; |
| 674 | } else { |
| 675 | mask = 0x01111; /*B lane 0, 1 */ |
| 676 | data = ep->link_status.lane_23_status; |
| 677 | data <<= 8; |
| 678 | data |= ep->link_status.lane_01_status; |
| 679 | } |
| 680 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 681 | dprintf(SPEW, "%s: data=%x mask=%x\n", __func__, data, mask); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 682 | data &= mask; |
| 683 | if (data == mask) /* all done */ |
| 684 | return 1; |
| 685 | |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | static int edp_sink_channel_eq_done(struct edp_aux_ctrl *ep) |
| 690 | { |
| 691 | int mask; |
| 692 | int data; |
| 693 | |
| 694 | |
| 695 | if (!ep->link_status.interlane_align_done) /* not align */ |
| 696 | return 0; |
| 697 | |
| 698 | if (ep->lane_cnt == 1) { |
| 699 | mask = 0x7; |
| 700 | data = ep->link_status.lane_01_status; |
| 701 | } else if (ep->lane_cnt == 2) { |
| 702 | mask = 0x77; |
| 703 | data = ep->link_status.lane_01_status; |
| 704 | } else { |
| 705 | mask = 0x7777; |
| 706 | data = ep->link_status.lane_23_status; |
| 707 | data <<= 8; |
| 708 | data |= ep->link_status.lane_01_status; |
| 709 | } |
| 710 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 711 | dprintf(SPEW, "%s: data=%x mask=%x\n", __func__, data, mask); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 712 | |
| 713 | data &= mask; |
| 714 | if (data == mask)/* all done */ |
| 715 | return 1; |
| 716 | |
| 717 | return 0; |
| 718 | } |
| 719 | |
| 720 | void edp_sink_train_set_adjust(struct edp_aux_ctrl *ep) |
| 721 | { |
| 722 | int i; |
| 723 | int max = 0; |
| 724 | |
| 725 | |
| 726 | /* use the max level across lanes */ |
| 727 | for (i = 0; i < ep->lane_cnt; i++) { |
| 728 | if (max < ep->link_status.req_voltage_swing[i]) |
| 729 | max = ep->link_status.req_voltage_swing[i]; |
| 730 | } |
| 731 | |
| 732 | ep->v_level = max; |
| 733 | |
| 734 | /* use the max level across lanes */ |
| 735 | max = 0; |
| 736 | for (i = 0; i < ep->lane_cnt; i++) { |
| 737 | if (max < ep->link_status.req_pre_emphasis[i]) |
| 738 | max = ep->link_status.req_pre_emphasis[i]; |
| 739 | } |
| 740 | |
| 741 | ep->p_level = max; |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 742 | dprintf(SPEW, "%s: v_level=%d, p_level=%d\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 743 | ep->v_level, ep->p_level); |
| 744 | } |
| 745 | |
| 746 | static void edp_host_train_set(struct edp_aux_ctrl *ep, int train) |
| 747 | { |
| 748 | int bit, cnt; |
| 749 | int data; |
| 750 | |
| 751 | |
| 752 | bit = 1; |
| 753 | bit <<= (train - 1); |
| 754 | edp_write(EDP_BASE + EDP_STATE_CTRL, bit); |
| 755 | |
| 756 | bit = 8; |
| 757 | bit <<= (train - 1); |
| 758 | cnt = 10; |
| 759 | while (cnt--) { |
| 760 | data = edp_read(EDP_BASE + EDP_MAINLINK_READY); |
| 761 | if (data & bit) |
| 762 | break; |
| 763 | } |
| 764 | |
| 765 | if (cnt == 0) |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 766 | dprintf(SPEW, "%s: set link_train=%d failed\n", __func__, train); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 767 | } |
| 768 | |
| 769 | char vm_pre_emphasis[4][4] = { |
| 770 | {0x03, 0x06, 0x09, 0x0C}, |
| 771 | {0x03, 0x06, 0x09, 0xFF}, |
| 772 | {0x03, 0x06, 0xFF, 0xFF}, |
| 773 | {0x03, 0xFF, 0xFF, 0xFF} |
| 774 | }; |
| 775 | |
| 776 | char vm_voltage_swing[4][4] = { |
| 777 | {0x64, 0x68, 0x6A, 0x6E}, |
| 778 | {0x68, 0x6A, 0x6E, 0xFF}, |
| 779 | {0x6A, 0x6E, 0xFF, 0xFF}, |
| 780 | {0x6E, 0xFF, 0xFF, 0xFF} |
| 781 | }; |
| 782 | |
| 783 | static void edp_voltage_pre_emphasise_set(struct edp_aux_ctrl *ep) |
| 784 | { |
| 785 | int value0 = 0; |
| 786 | int value1 = 0; |
| 787 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 788 | dprintf(SPEW, "%s: v=%d p=%d\n", __func__, ep->v_level, ep->p_level); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 789 | |
| 790 | value0 = vm_pre_emphasis[(int)(ep->v_level)][(int)(ep->p_level)]; |
| 791 | value1 = vm_voltage_swing[(int)(ep->v_level)][(int)(ep->p_level)]; |
| 792 | |
| 793 | /* Configure host and panel only if both values are allowed */ |
| 794 | if (value0 != 0xFF && value1 != 0xFF) { |
| 795 | edp_write(EDP_BASE + EDP_PHY_EDPPHY_GLB_VM_CFG0, value0); |
| 796 | edp_write(EDP_BASE + EDP_PHY_EDPPHY_GLB_VM_CFG1, value1); |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 797 | dprintf(SPEW, "%s: value0=0x%x value1=0x%x\n", __func__, |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 798 | value0, value1); |
| 799 | edp_lane_set_write(ep, ep->v_level, ep->p_level); |
| 800 | } |
| 801 | |
| 802 | } |
| 803 | |
| 804 | static int edp_start_link_train_1(struct edp_aux_ctrl *ep) |
| 805 | { |
| 806 | int tries, old_v_level; |
| 807 | int ret = 0; |
| 808 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 809 | dprintf(SPEW, "%s:\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 810 | |
| 811 | edp_host_train_set(ep, 0x01); /* train_1 */ |
| 812 | edp_voltage_pre_emphasise_set(ep); |
| 813 | edp_train_pattern_set_write(ep, 0x21); /* train_1 */ |
| 814 | |
| 815 | tries = 0; |
| 816 | old_v_level = ep->v_level; |
| 817 | while (1) { |
| 818 | udelay(ep->dpcd.training_read_interval * 10); |
| 819 | |
| 820 | edp_link_status_read(ep, 6); |
| 821 | if (edp_sink_clock_recovery_done(ep)) { |
| 822 | ret = 0; |
| 823 | break; |
| 824 | } |
| 825 | |
| 826 | if (ep->v_level == DPCD_LINK_VOLTAGE_MAX) { |
| 827 | ret = -1; |
| 828 | break; /* quit */ |
| 829 | } |
| 830 | |
| 831 | if (old_v_level == ep->v_level) { |
| 832 | tries++; |
| 833 | if (tries >= 5) { |
| 834 | ret = -1; |
| 835 | break; /* quit */ |
| 836 | } |
| 837 | } else { |
| 838 | tries = 0; |
| 839 | old_v_level = ep->v_level; |
| 840 | } |
| 841 | |
| 842 | edp_sink_train_set_adjust(ep); |
| 843 | edp_voltage_pre_emphasise_set(ep); |
| 844 | } |
| 845 | |
| 846 | return ret; |
| 847 | } |
| 848 | |
| 849 | static int edp_start_link_train_2(struct edp_aux_ctrl *ep) |
| 850 | { |
| 851 | int tries; |
| 852 | int ret = 0; |
| 853 | char pattern; |
| 854 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 855 | dprintf(SPEW, "%s\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 856 | |
| 857 | if (ep->dpcd.flags & DPCD_TPS3) |
| 858 | pattern = 0x03; |
| 859 | else |
| 860 | pattern = 0x02; |
| 861 | |
| 862 | edp_host_train_set(ep, pattern); /* train_2 */ |
| 863 | edp_voltage_pre_emphasise_set(ep); |
| 864 | edp_train_pattern_set_write(ep, pattern | 0x20);/* train_2 */ |
| 865 | |
| 866 | tries = 0; |
| 867 | while (1) { |
| 868 | udelay(ep->dpcd.training_read_interval); |
| 869 | |
| 870 | edp_link_status_read(ep, 6); |
| 871 | |
| 872 | if (edp_sink_channel_eq_done(ep)) { |
| 873 | ret = 0; |
| 874 | break; |
| 875 | } |
| 876 | |
| 877 | tries++; |
| 878 | if (tries > 5) { |
| 879 | ret = -1; |
| 880 | break; |
| 881 | } |
| 882 | |
| 883 | edp_sink_train_set_adjust(ep); |
| 884 | edp_voltage_pre_emphasise_set(ep); |
| 885 | } |
| 886 | |
| 887 | return ret; |
| 888 | } |
| 889 | |
| 890 | static int edp_link_rate_shift(struct edp_aux_ctrl *ep) |
| 891 | { |
| 892 | /* add calculation later */ |
| 893 | return -1; |
| 894 | } |
| 895 | |
| 896 | static void edp_clear_training_pattern(struct edp_aux_ctrl *ep) |
| 897 | { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 898 | dprintf(SPEW, "%s:\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 899 | edp_write(EDP_BASE + EDP_STATE_CTRL, 0); |
| 900 | edp_train_pattern_set_write(ep, 0); |
| 901 | udelay(ep->dpcd.training_read_interval); |
| 902 | } |
| 903 | |
| 904 | static int edp_aux_link_train(struct edp_aux_ctrl *ep) |
| 905 | { |
| 906 | int ret = 0; |
| 907 | |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 908 | dprintf(SPEW, "%s:\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 909 | ret = edp_aux_chan_ready(ep); |
| 910 | if (ret == 0) { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 911 | dprintf(INFO, "%s: Error: aux chan NOT ready\n", |
| 912 | __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 913 | return ret; |
| 914 | } |
| 915 | |
| 916 | /* start with max rate and lane */ |
| 917 | ep->lane_cnt = ep->dpcd.max_lane_count; |
| 918 | ep->link_rate = ep->dpcd.max_link_rate; |
| 919 | edp_write(EDP_BASE + EDP_MAINLINK_CTRL, 0x1); |
| 920 | |
| 921 | train_start: |
| 922 | ep->v_level = 0; /* start from default level */ |
| 923 | ep->p_level = 0; |
| 924 | edp_cap_lane_rate_set(ep); |
| 925 | |
| 926 | edp_clear_training_pattern(ep); |
| 927 | udelay(ep->dpcd.training_read_interval); |
| 928 | edp_powerstate_write(ep, 1); |
| 929 | |
| 930 | ret = edp_start_link_train_1(ep); |
| 931 | if (ret < 0) { |
| 932 | if (edp_link_rate_shift(ep) == 0) { |
| 933 | goto train_start; |
| 934 | } else { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 935 | dprintf(INFO, "%s: Training 1 failed\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 936 | ret = -1; |
| 937 | goto clear; |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | dprintf(INFO, "%s: Training 1 completed successfully\n", __func__); |
| 942 | |
| 943 | edp_clear_training_pattern(ep); |
| 944 | ret = edp_start_link_train_2(ep); |
| 945 | if (ret < 0) { |
| 946 | if (edp_link_rate_shift(ep) == 0) { |
| 947 | goto train_start; |
| 948 | } else { |
Kuogee Hsieh | e3b50dd | 2013-09-25 14:40:25 -0700 | [diff] [blame] | 949 | dprintf(INFO, "%s: Training 2 failed\n", __func__); |
Kuogee Hsieh | ad69c3c | 2013-08-01 14:34:29 -0700 | [diff] [blame] | 950 | ret = -1; |
| 951 | goto clear; |
| 952 | } |
| 953 | } |
| 954 | |
| 955 | dprintf(INFO, "%s: Training 2 completed successfully\n", __func__); |
| 956 | |
| 957 | clear: |
| 958 | edp_clear_training_pattern(ep); |
| 959 | |
| 960 | return ret; |
| 961 | } |
| 962 | |
| 963 | void mdss_edp_wait_for_hpd(void) |
| 964 | { |
| 965 | while(1) { |
| 966 | udelay(1000); |
| 967 | edp_isr_poll(); |
| 968 | if (edp_hpd_done) { |
| 969 | edp_hpd_done = 0; |
| 970 | break; |
| 971 | } |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | void mdss_edp_wait_for_video_ready(void) |
| 976 | { |
| 977 | while(1) { |
| 978 | udelay(1000); |
| 979 | edp_isr_poll(); |
| 980 | if (edp_video_ready) { |
| 981 | edp_video_ready = 0; |
| 982 | break; |
| 983 | } |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | void mdss_edp_dpcd_cap_read(void) |
| 988 | { |
| 989 | edp_sink_capability_read(&edpctrl, 16); |
| 990 | } |
| 991 | void mdss_edp_pll_configure(void) |
| 992 | { |
| 993 | struct display_timing_desc *dp; |
| 994 | |
| 995 | dp = &edpctrl.edid.timing[0]; |
| 996 | edp_pll_configure(dp->pclk); |
| 997 | } |
| 998 | |
| 999 | void mdss_edp_lane_power_ctrl(int up) |
| 1000 | { |
| 1001 | |
| 1002 | dprintf(SPEW, "%s: max_lane=%d\n", __func__, edpctrl.dpcd.max_lane_count); |
| 1003 | edp_lane_power_ctrl(edpctrl.dpcd.max_lane_count, up); |
| 1004 | |
| 1005 | } |
| 1006 | |
| 1007 | void mdss_edp_dpcd_status_read(void) |
| 1008 | { |
| 1009 | edp_link_status_read(&edpctrl, 6); |
| 1010 | } |
| 1011 | |
| 1012 | void mdss_edp_edid_read(void) |
| 1013 | { |
| 1014 | edp_sink_edid_read(&edpctrl, 0); |
| 1015 | } |
| 1016 | |
| 1017 | int mdss_edp_link_train(void) |
| 1018 | { |
| 1019 | return edp_aux_link_train(&edpctrl); |
| 1020 | } |
| 1021 | |
| 1022 | void mdss_edp_aux_init(void) |
| 1023 | { |
| 1024 | edp_buf_init(&edpctrl.txp, edpctrl.txbuf, sizeof(edpctrl.txbuf)); |
| 1025 | edp_buf_init(&edpctrl.rxp, edpctrl.rxbuf, sizeof(edpctrl.rxbuf)); |
| 1026 | } |