drivers/video/rockchip/hdmi/rockchip-hdmi-edid.c

   1 #include "rockchip-hdmi.h"
   2 #include "../../edid.h"
   3
   4 #ifdef EDIDDEBUG
   5 #define EDBG    DBG
   6 #else
   7 #define EDBG(format, ...)
   8 #endif
   9
  10 enum {
  11         E_HDMI_EDID_SUCCESS = 0,
  12         E_HDMI_EDID_PARAM,
  13         E_HDMI_EDID_HEAD,
  14         E_HDMI_EDID_CHECKSUM,
  15         E_HDMI_EDID_VERSION,
  16         E_HDMI_EDID_UNKOWNDATA,
  17         E_HDMI_EDID_NOMEMORY
  18 };
  19
  20 static int hdmi_edid_checksum(unsigned char *buf)
  21 {
  22         int i;
  23         int checksum = 0;
  24
  25         for (i = 0; i < HDMI_EDID_BLOCK_SIZE; i++)
  26                 checksum += buf[i];
  27
  28         checksum &= 0xff;
  29
  30         if (checksum == 0)
  31                 return E_HDMI_EDID_SUCCESS;
  32         else
  33                 return E_HDMI_EDID_CHECKSUM;
  34 }
  35
  36 /*
  37         @Des    Parse Detail Timing Descriptor.
  38         @Param  buf     :       pointer to DTD data.
  39         @Param  pvic:   VIC of DTD descripted.
  40  */
  41 static int hdmi_edid_parse_dtd(unsigned char *block, struct fb_videomode *mode)
  42 {
  43         mode->xres = H_ACTIVE;
  44         mode->yres = V_ACTIVE;
  45         mode->pixclock = PIXEL_CLOCK;
  46 /*      mode->pixclock /= 1000;
  47         mode->pixclock = KHZ2PICOS(mode->pixclock);
  48 */      mode->right_margin = H_SYNC_OFFSET;
  49         mode->left_margin = (H_ACTIVE + H_BLANKING) -
  50                 (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
  51         mode->upper_margin = V_BLANKING - V_SYNC_OFFSET -
  52                 V_SYNC_WIDTH;
  53         mode->lower_margin = V_SYNC_OFFSET;
  54         mode->hsync_len = H_SYNC_WIDTH;
  55         mode->vsync_len = V_SYNC_WIDTH;
  56         if (HSYNC_POSITIVE)
  57                 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
  58         if (VSYNC_POSITIVE)
  59                 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
  60         mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) *
  61                                      (V_ACTIVE + V_BLANKING));
  62         if (INTERLACED) {
  63                 mode->yres *= 2;
  64                 mode->upper_margin *= 2;
  65                 mode->lower_margin *= 2;
  66                 mode->vsync_len *= 2;
  67                 mode->vmode |= FB_VMODE_INTERLACED;
  68         }
  69         mode->flag = FB_MODE_IS_DETAILED;
  70
  71         EDBG("<<<<<<<<Detailed Time>>>>>>>>>\n");
  72         EDBG("%d KHz Refresh %d Hz",
  73              PIXEL_CLOCK/1000, mode->refresh);
  74         EDBG("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET,
  75              H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING);
  76         EDBG("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET,
  77              V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING);
  78         EDBG("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-",
  79              (VSYNC_POSITIVE) ? "+" : "-");
  80         return E_HDMI_EDID_SUCCESS;
  81 }
  82
  83 int hdmi_edid_parse_base(unsigned char *buf,
  84                          int *extend_num, struct hdmi_edid *pedid)
  85 {
  86         int rc;
  87
  88         if (buf == NULL || extend_num == NULL)
  89                 return E_HDMI_EDID_PARAM;
  90
  91         /* Check first 8 byte to ensure it is an edid base block. */
  92         if (buf[0] != 0x00 ||
  93             buf[1] != 0xFF ||
  94             buf[2] != 0xFF ||
  95             buf[3] != 0xFF ||
  96             buf[4] != 0xFF ||
  97             buf[5] != 0xFF ||
  98             buf[6] != 0xFF ||
  99             buf[7] != 0x00) {
 100                 pr_err("[EDID] check header error\n");
 101                 return E_HDMI_EDID_HEAD;
 102         }
 103
 104         *extend_num = buf[0x7e];
 105         #ifdef DEBUG
 106         EDBG("[EDID] extend block num is %d\n", buf[0x7e]);
 107         #endif
 108
 109         /* Checksum */
 110         rc = hdmi_edid_checksum(buf);
 111         if (rc != E_HDMI_EDID_SUCCESS) {
 112                 pr_err("[EDID] base block checksum error\n");
 113                 return E_HDMI_EDID_CHECKSUM;
 114         }
 115
 116         pedid->specs = kzalloc(sizeof(*pedid->specs), GFP_KERNEL);
 117         if (pedid->specs == NULL)
 118                 return E_HDMI_EDID_NOMEMORY;
 119
 120         fb_edid_to_monspecs(buf, pedid->specs);
 121
 122         return E_HDMI_EDID_SUCCESS;
 123 }
 124
 125 /* Parse CEA Short Video Descriptor */
 126 static int hdmi_edid_get_cea_svd(unsigned char *buf, struct hdmi_edid *pedid)
 127 {
 128         int count, i, vic;
 129
 130         count = buf[0] & 0x1F;
 131         for (i = 0; i < count; i++) {
 132                 EDBG("[CEA] %02x VID %d native %d\n",
 133                      buf[1 + i], buf[1 + i] & 0x7f, buf[1 + i] >> 7);
 134                 vic = buf[1 + i] & 0x7f;
 135                 hdmi_add_vic(vic, &pedid->modelist);
 136         }
 137 /*
 138         struct list_head *pos;
 139         struct display_modelist *modelist;
 140
 141         list_for_each(pos, &pedid->modelist) {
 142                 modelist = list_entry(pos, struct display_modelist, list);
 143                 pr_info("%s vic %d\n", __FUNCTION__, modelist->vic);
 144         }
 145 */      return 0;
 146 }
 147
 148 /* Parse CEA Short Audio Descriptor */
 149 static int hdmi_edid_parse_cea_sad(unsigned char *buf, struct hdmi_edid *pedid)
 150 {
 151         int i, count;
 152
 153         count = buf[0] & 0x1F;
 154         pedid->audio = kmalloc((count/3)*sizeof(struct hdmi_audio), GFP_KERNEL);
 155         if (pedid->audio == NULL)
 156                 return E_HDMI_EDID_NOMEMORY;
 157
 158         pedid->audio_num = count/3;
 159         for (i = 0; i < pedid->audio_num; i++) {
 160                 pedid->audio[i].type = (buf[1 + i*3] >> 3) & 0x0F;
 161                 pedid->audio[i].channel = (buf[1 + i*3] & 0x07) + 1;
 162                 pedid->audio[i].rate = buf[1 + i*3 + 1];
 163                 if (pedid->audio[i].type == HDMI_AUDIO_LPCM)
 164                         pedid->audio[i].word_length = buf[1 + i*3 + 2];
 165
 166 /*              pr_info("type %d channel %d rate %d word length %d\n",
 167                         pedid->audio[i].type, pedid->audio[i].channel,
 168                         pedid->audio[i].rate, pedid->audio[i].word_length);
 169 */      }
 170         return E_HDMI_EDID_SUCCESS;
 171 }
 172
 173 static int hdmi_edid_parse_3dinfo(unsigned char *buf, struct list_head *head)
 174 {
 175         int i, j, len = 0, format_3d, vic_mask;
 176         unsigned char offset = 2, vic_2d, structure_3d;
 177         struct list_head *pos;
 178         struct display_modelist *modelist;
 179
 180         if (buf[1] & 0xe0) {
 181                 len = (buf[1] & 0xe0) >> 5;
 182                 for (i = 0; i < len; i++) {
 183                         if (buf[offset])
 184                                 hdmi_add_vic((96 - buf[offset]), head);
 185                         offset++;
 186                 }
 187         }
 188
 189         if (buf[0] & 0x80) {
 190                 /* 3d supported */
 191                 len += (buf[1] & 0x1F) + 2;
 192                 if (((buf[0] & 0x60) == 0x40) || ((buf[0] & 0x60) == 0x20)) {
 193                         format_3d = buf[offset++] << 8;
 194                         format_3d |= buf[offset++];
 195                         if ((buf[0] & 0x60) == 0x20) {
 196                                 vic_mask = 0xFFFF;
 197                         } else {
 198                                 vic_mask  = buf[offset++] << 8;
 199                                 vic_mask |= buf[offset++];
 200                         }
 201                 } else {
 202                         format_3d = 0;
 203                         vic_mask = 0;
 204                 }
 205
 206                 for (i = 0; i < 16; i++) {
 207                         if (vic_mask & (1 << i)) {
 208                                 j = 0;
 209                                 for (pos = (head)->next; pos != (head);
 210                                         pos = pos->next) {
 211                                         if (j++ == i) {
 212                                                 modelist =
 213                         list_entry(pos, struct display_modelist, list);
 214                                                 modelist->format_3d = format_3d;
 215                                                 break;
 216                                         }
 217                                 }
 218                         }
 219                 }
 220                 while (offset < len) {
 221                         vic_2d = (buf[offset] & 0xF0) >> 4;
 222                         structure_3d = (buf[offset++] & 0x0F);
 223                         j = 0;
 224                         for (pos = (head)->next; pos != (head);
 225                                 pos = pos->next) {
 226                                 j++;
 227                                 if (j == vic_2d) {
 228                                         modelist =
 229                                 list_entry(pos, struct display_modelist, list);
 230                                         modelist->format_3d |=
 231                                                 (1 << structure_3d);
 232                                         if (structure_3d & 0x08)
 233                                                 modelist->detail_3d =
 234                                                 (buf[offset++] & 0xF0) >> 4;
 235                                         break;
 236                                 }
 237                         }
 238                 }
 239                 /* mandatory formats */
 240                 for (pos = (head)->next; pos != (head); pos = pos->next) {
 241                         modelist = list_entry(pos,
 242                                               struct display_modelist,
 243                                               list);
 244                         if (modelist->vic == HDMI_1920X1080P_24HZ ||
 245                             modelist->vic == HDMI_1280X720P_60HZ ||
 246                             modelist->vic == HDMI_1280X720P_50HZ) {
 247                                 modelist->format_3d |=
 248                                         (1 << HDMI_3D_FRAME_PACKING) |
 249                                         (1 << HDMI_3D_TOP_BOOTOM);
 250                         } else if (modelist->vic == HDMI_1920X1080I_60HZ ||
 251                                    modelist->vic == HDMI_1920X1080I_50HZ) {
 252                                 modelist->format_3d |=
 253                                         (1 << HDMI_3D_SIDE_BY_SIDE_HALF);
 254                         }
 255                 }
 256         }
 257
 258         return 0;
 259 }
 260 static int hdmi_edmi_parse_vsdb(unsigned char *buf, struct hdmi_edid *pedid,
 261                                 int cur_offset, int IEEEOUI)
 262 {
 263         int count, buf_offset;
 264
 265         count = buf[cur_offset] & 0x1F;
 266         switch (IEEEOUI) {
 267         case 0x0c03:
 268                 pedid->sink_hdmi = 1;
 269                 pedid->cecaddress = buf[cur_offset + 5];
 270                 pedid->cecaddress |= buf[cur_offset + 4] << 8;
 271                 EDBG("[CEA] CEC Physical addres is 0x%08x.\n",
 272                      pedid->cecaddress);
 273                 if (count > 6)
 274                         pedid->deepcolor = (buf[cur_offset + 6] >> 3) & 0x0F;
 275                 if (count > 7) {
 276                         pedid->maxtmdsclock = buf[cur_offset + 7] * 5000000;
 277                         EDBG("[CEA] maxtmdsclock is %d.\n",
 278                              pedid->maxtmdsclock);
 279                 }
 280                 if (count > 8) {
 281                         pedid->fields_present = buf[cur_offset + 8];
 282                         EDBG("[CEA] fields_present is 0x%02x.\n",
 283                              pedid->fields_present);
 284                 }
 285                 buf_offset = cur_offset + 9;
 286                 if (pedid->fields_present & 0x80) {
 287                         pedid->video_latency = buf[buf_offset++];
 288                         pedid->audio_latency = buf[buf_offset++];
 289                 }
 290                 if (pedid->fields_present & 0x40) {
 291                         pedid->interlaced_video_latency = buf[buf_offset++];
 292                         pedid->interlaced_audio_latency = buf[buf_offset++];
 293                 }
 294                 if (pedid->fields_present & 0x20) {
 295                         hdmi_edid_parse_3dinfo(buf + buf_offset,
 296                                                &pedid->modelist);
 297                 }
 298                 break;
 299         case 0xc45dd8:
 300                 pedid->sink_hdmi = 1;
 301                 if (count > 4)
 302                         pedid->hf_vsdb_version = buf[cur_offset + 4];
 303                 switch (pedid->hf_vsdb_version) {
 304                 case 1:/*compliant with HDMI Specification 2.0*/
 305                         if (count > 5) {
 306                                 pedid->maxtmdsclock =
 307                                         buf[cur_offset + 5] * 5000000;
 308                                 EDBG("[CEA] maxtmdsclock is %d.\n",
 309                                      pedid->maxtmdsclock);
 310                         }
 311                         if (count > 6) {
 312                                 pedid->scdc_present = buf[cur_offset+6] >> 7;
 313                                 pedid->rr_capable =
 314                                         (buf[cur_offset+6]&0x40) >> 6;
 315                                 pedid->lte_340mcsc_scramble =
 316                                         (buf[cur_offset+6]&0x08) >> 3;
 317                                 pedid->independent_view =
 318                                         (buf[cur_offset+6]&0x04) >> 2;
 319                                 pedid->dual_view =
 320                                         (buf[cur_offset+6]&0x02) >> 1;
 321                                 pedid->osd_disparity_3d =
 322                                         buf[cur_offset+6] & 0x01;
 323                         }
 324                         if (count > 7) {
 325                                 pedid->deepcolor = buf[cur_offset+7]&0x7;
 326                                 EDBG("[CEA] deepcolor is %d.\n",
 327                                      pedid->deepcolor);
 328                         }
 329                         break;
 330                 default:
 331                         pr_info("hf_vsdb_version = %d\n",
 332                                 pedid->hf_vsdb_version);
 333                         break;
 334                 }
 335                 break;
 336         default:
 337                 pr_info("IEEOUT = 0x%x\n", IEEEOUI);
 338                 break;
 339         }
 340         return 0;
 341 }
 342
 343 static void hdmi_edid_parse_yuv420cmdb(unsigned char *buf, int count,
 344                                        struct list_head *head)
 345 {
 346         struct list_head *pos;
 347         struct display_modelist *modelist;
 348         int i, j, yuv420_mask, vic;
 349
 350         for (i = 0; i < count - 1; i++) {
 351                 EDBG("vic which support yuv420 mode is %x\n", buf[i]);
 352                 yuv420_mask |= buf[i] << (8 * i);
 353         }
 354         for (i = 0; i < 32; i++) {
 355                 if (yuv420_mask & (1 << i)) {
 356                         j = 0;
 357                         for (pos = head->next; pos != (head); pos = pos->next) {
 358                                 if (j++ == i) {
 359                                         modelist =
 360                                 list_entry(pos, struct display_modelist, list);
 361                                         vic = modelist->vic |
 362                                               HDMI_VIDEO_YUV420;
 363                                         hdmi_add_vic(vic, head);
 364                                         break;
 365                                 }
 366                         }
 367                 }
 368         }
 369 }
 370
 371 /* Parse CEA 861 Serial Extension. */
 372 static int hdmi_edid_parse_extensions_cea(unsigned char *buf,
 373                                           struct hdmi_edid *pedid)
 374 {
 375         unsigned int ddc_offset, native_dtd_num, cur_offset = 4;
 376         unsigned int tag, IEEEOUI = 0, count, i;
 377 /*      unsigned int underscan_support, baseaudio_support; */
 378
 379         if (buf == NULL)
 380                 return E_HDMI_EDID_PARAM;
 381
 382         /* Check ces extension version */
 383         if (buf[1] != 3) {
 384                 pr_err("[CEA] error version.\n");
 385                 return E_HDMI_EDID_VERSION;
 386         }
 387
 388         ddc_offset = buf[2];
 389 /*      underscan_support = (buf[3] >> 7) & 0x01;
 390 */      pedid->baseaudio_support = (buf[3] >> 6) & 0x01;
 391         pedid->ycbcr444 = (buf[3] >> 5) & 0x01;
 392         pedid->ycbcr422 = (buf[3] >> 4) & 0x01;
 393         native_dtd_num = buf[3] & 0x0F;
 394 /*      EDBG("[CEA] ddc_offset %d underscan_support %d
 395             baseaudio_support %d yuv_support %d
 396             native_dtd_num %d\n",
 397             ddc_offset, underscan_support, baseaudio_support,
 398             yuv_support, native_dtd_num);
 399 */      /* Parse data block */
 400         while (cur_offset < ddc_offset) {
 401                 tag = buf[cur_offset] >> 5;
 402                 count = buf[cur_offset] & 0x1F;
 403                 switch (tag) {
 404                 case 0x02:      /* Video Data Block */
 405                         EDBG("[CEA] Video Data Block.\n");
 406                         hdmi_edid_get_cea_svd(buf + cur_offset, pedid);
 407                         break;
 408                 case 0x01:      /* Audio Data Block */
 409                         EDBG("[CEA] Audio Data Block.\n");
 410                         hdmi_edid_parse_cea_sad(buf + cur_offset, pedid);
 411                         break;
 412                 case 0x04:      /* Speaker Allocation Data Block */
 413                         EDBG("[CEA] Speaker Allocatio Data Block.\n");
 414                         break;
 415                 case 0x03:      /* Vendor Specific Data Block */
 416                         EDBG("[CEA] Vendor Specific Data Block.\n");
 417
 418                         IEEEOUI = buf[cur_offset + 3];
 419                         IEEEOUI <<= 8;
 420                         IEEEOUI += buf[cur_offset + 2];
 421                         IEEEOUI <<= 8;
 422                         IEEEOUI += buf[cur_offset + 1];
 423                         EDBG("[CEA] IEEEOUI is 0x%08x.\n", IEEEOUI);
 424
 425                         hdmi_edmi_parse_vsdb(buf, pedid,
 426                                              cur_offset, IEEEOUI);
 427                         break;
 428                 case 0x05:      /* VESA DTC Data Block */
 429                         EDBG("[CEA] VESA DTC Data Block.\n");
 430                         break;
 431                 case 0x07:      /* Use Extended Tag */
 432                         EDBG("[CEA] Use Extended Tag Data Block %02x.\n",
 433                              buf[cur_offset + 1]);
 434                         switch (buf[cur_offset + 1]) {
 435                         case 0x00:
 436                                 EDBG("[CEA] Video Capability Data Block\n");
 437                                 EDBG("value is %02x\n", buf[cur_offset + 2]);
 438                                 break;
 439                         case 0x05:
 440                                 EDBG("[CEA] Colorimetry Data Block\n");
 441                                 EDBG("value is %02x\n", buf[cur_offset + 2]);
 442                                 break;
 443                         case 0x0e:
 444                                 EDBG("[CEA] YCBCR 4:2:0 Video Data Block\n");
 445                                 for (i = 0; i < count - 1; i++) {
 446                                         EDBG("mode is %d\n",
 447                                              buf[cur_offset + 2 + i]);
 448                                         pedid->ycbcr420 = 1;
 449                                         IEEEOUI = buf[cur_offset + 2 + i] |
 450                                                   HDMI_VIDEO_YUV420;
 451                                         hdmi_add_vic(IEEEOUI,
 452                                                      &pedid->modelist);
 453                                 }
 454                                 break;
 455                         case 0x0f:
 456                                 EDBG("[CEA] YCBCR 4:2:0 Capability Map Data\n");
 457                                 hdmi_edid_parse_yuv420cmdb(&buf[cur_offset+2],
 458                                                            count,
 459                                                            &pedid->modelist);
 460                                 pedid->ycbcr420 = 1;
 461                                 break;
 462                         }
 463                         break;
 464                 default:
 465                         pr_err("[CEA] unkowned data block tag.\n");
 466                         break;
 467                 }
 468                 cur_offset += (buf[cur_offset] & 0x1F) + 1;
 469         }
 470 #if 1
 471 {
 472         /* Parse DTD */
 473         struct fb_videomode *vmode =
 474                 kmalloc(sizeof(struct fb_videomode), GFP_KERNEL);
 475
 476         if (vmode == NULL)
 477                 return E_HDMI_EDID_SUCCESS;
 478         while (ddc_offset < HDMI_EDID_BLOCK_SIZE - 2) {
 479                 if (!buf[ddc_offset] && !buf[ddc_offset + 1])
 480                         break;
 481                 memset(vmode, 0, sizeof(struct fb_videomode));
 482                 hdmi_edid_parse_dtd(buf + ddc_offset, vmode);
 483                 hdmi_add_vic(hdmi_videomode_to_vic(vmode), &pedid->modelist);
 484                 ddc_offset += 18;
 485         }
 486         kfree(vmode);
 487 }
 488 #endif
 489         return E_HDMI_EDID_SUCCESS;
 490 }
 491
 492 int hdmi_edid_parse_extensions(unsigned char *buf, struct hdmi_edid *pedid)
 493 {
 494         int rc;
 495
 496         if (buf == NULL || pedid == NULL)
 497                 return E_HDMI_EDID_PARAM;
 498
 499         /* Checksum */
 500         rc = hdmi_edid_checksum(buf);
 501         if (rc != E_HDMI_EDID_SUCCESS) {
 502                 pr_err("[EDID] extensions block checksum error\n");
 503                 return E_HDMI_EDID_CHECKSUM;
 504         }
 505
 506         switch (buf[0]) {
 507         case 0xF0:
 508                 EDBG("[EDID-EXTEND] Iextensions block map.\n");
 509                 break;
 510         case 0x02:
 511                 EDBG("[EDID-EXTEND] CEA 861 Series Extension.\n");
 512                 hdmi_edid_parse_extensions_cea(buf, pedid);
 513                 break;
 514         case 0x10:
 515                 EDBG("[EDID-EXTEND] Video Timing Block Extension.\n");
 516                 break;
 517         case 0x40:
 518                 EDBG("[EDID-EXTEND] Display Information Extension.\n");
 519                 break;
 520         case 0x50:
 521                 EDBG("[EDID-EXTEND] Localized String Extension.\n");
 522                 break;
 523         case 0x60:
 524                 EDBG("[EDID-EXTEND] Digital Packet Video Link Extension.\n");
 525                 break;
 526         default:
 527                 pr_err("[EDID-EXTEND] Unkowned Extension.\n");
 528                 return E_HDMI_EDID_UNKOWNDATA;
 529         }
 530
 531         return E_HDMI_EDID_SUCCESS;
 532 }