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

   1 #include "rockchip-hdmi.h"
   2 #include "../../fbdev/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->right_margin = H_SYNC_OFFSET;
  47         mode->left_margin = (H_ACTIVE + H_BLANKING) -
  48                 (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
  49         mode->upper_margin = V_BLANKING - V_SYNC_OFFSET -
  50                 V_SYNC_WIDTH;
  51         mode->lower_margin = V_SYNC_OFFSET;
  52         mode->hsync_len = H_SYNC_WIDTH;
  53         mode->vsync_len = V_SYNC_WIDTH;
  54         if (HSYNC_POSITIVE)
  55                 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
  56         if (VSYNC_POSITIVE)
  57                 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
  58         mode->refresh = PIXEL_CLOCK / ((H_ACTIVE + H_BLANKING) *
  59                                        (V_ACTIVE + V_BLANKING));
  60         if (INTERLACED) {
  61                 mode->yres *= 2;
  62                 mode->upper_margin *= 2;
  63                 mode->lower_margin *= 2;
  64                 mode->vsync_len *= 2;
  65                 mode->vmode |= FB_VMODE_INTERLACED;
  66         }
  67         mode->flag = FB_MODE_IS_DETAILED;
  68
  69         EDBG("<<<<<<<<Detailed Time>>>>>>>>>\n");
  70         EDBG("%d KHz Refresh %d Hz",
  71              PIXEL_CLOCK / 1000, mode->refresh);
  72         EDBG("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET,
  73              H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING);
  74         EDBG("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET,
  75              V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING);
  76         EDBG("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-",
  77              (VSYNC_POSITIVE) ? "+" : "-");
  78         return E_HDMI_EDID_SUCCESS;
  79 }
  80
  81 int hdmi_edid_parse_base(unsigned char *buf,
  82                          int *extend_num, struct hdmi_edid *pedid)
  83 {
  84         int rc = E_HDMI_EDID_SUCCESS;
  85
  86         if (!buf || !extend_num)
  87                 return E_HDMI_EDID_PARAM;
  88
  89         *extend_num = buf[0x7e];
  90         #ifdef DEBUG
  91         EDBG("[EDID] extend block num is %d\n", buf[0x7e]);
  92         #endif
  93
  94         /* Check first 8 byte to ensure it is an edid base block. */
  95         if (buf[0] != 0x00 ||
  96             buf[1] != 0xFF ||
  97             buf[2] != 0xFF ||
  98             buf[3] != 0xFF ||
  99             buf[4] != 0xFF ||
 100             buf[5] != 0xFF ||
 101             buf[6] != 0xFF ||
 102             buf[7] != 0x00) {
 103                 pr_err("[EDID] check header error\n");
 104                 rc = E_HDMI_EDID_HEAD;
 105                 goto out;
 106         }
 107
 108         /* Checksum */
 109         rc = hdmi_edid_checksum(buf);
 110         if (rc != E_HDMI_EDID_SUCCESS) {
 111                 pr_err("[EDID] base block checksum error\n");
 112                 rc = E_HDMI_EDID_CHECKSUM;
 113                 goto out;
 114         }
 115
 116         pedid->specs = kzalloc(sizeof(*pedid->specs), GFP_KERNEL);
 117         if (!pedid->specs)
 118                 return E_HDMI_EDID_NOMEMORY;
 119
 120         fb_edid_to_monspecs(buf, pedid->specs);
 121
 122 out:
 123         /* For some sink, edid checksum is failed because several
 124          * byte is wrong. To fix this case, we think it is a good
 125          * edid if 1 <= *extend_num <= 4.
 126          */
 127         if ((rc != E_HDMI_EDID_SUCCESS) &&
 128             (*extend_num < 1 || *extend_num > 4))
 129                 return rc;
 130         else
 131                 return E_HDMI_EDID_SUCCESS;
 132 }
 133
 134 /* Parse CEA Short Video Descriptor */
 135 static int hdmi_edid_get_cea_svd(unsigned char *buf, struct hdmi_edid *pedid)
 136 {
 137         int count, i, vic;
 138
 139         count = buf[0] & 0x1F;
 140         for (i = 0; i < count; i++) {
 141                 EDBG("[CEA] %02x VID %d native %d\n",
 142                      buf[1 + i], buf[1 + i] & 0x7f, buf[1 + i] >> 7);
 143                 vic = buf[1 + i] & 0x7f;
 144                 hdmi_add_vic(vic, &pedid->modelist);
 145         }
 146         return 0;
 147 }
 148
 149 /* Parse CEA Short Audio Descriptor */
 150 static int hdmi_edid_parse_cea_sad(unsigned char *buf, struct hdmi_edid *pedid)
 151 {
 152         int i, count;
 153
 154         count = buf[0] & 0x1F;
 155         pedid->audio = kmalloc((count / 3) * sizeof(struct hdmi_audio),
 156                                GFP_KERNEL);
 157         if (!pedid->audio)
 158                 return E_HDMI_EDID_NOMEMORY;
 159
 160         pedid->audio_num = count / 3;
 161         for (i = 0; i < pedid->audio_num; i++) {
 162                 pedid->audio[i].type = (buf[1 + i * 3] >> 3) & 0x0F;
 163                 pedid->audio[i].channel = (buf[1 + i * 3] & 0x07) + 1;
 164                 pedid->audio[i].rate = buf[1 + i * 3 + 1];
 165                 if (pedid->audio[i].type == HDMI_AUDIO_LPCM)
 166                         pedid->audio[i].word_length = buf[1 + i * 3 + 2];
 167         }
 168         return E_HDMI_EDID_SUCCESS;
 169 }
 170
 171 static int hdmi_edid_parse_3dinfo(unsigned char *buf, struct list_head *head)
 172 {
 173         int i, j, len = 0, format_3d, vic_mask;
 174         unsigned char offset = 2, vic_2d, structure_3d;
 175         struct list_head *pos;
 176         struct display_modelist *modelist;
 177
 178         if (buf[1] & 0xe0) {
 179                 len = (buf[1] & 0xe0) >> 5;
 180                 for (i = 0; i < len; i++) {
 181                         if (buf[offset]) {
 182                                 vic_2d = (buf[offset] == 4) ?
 183                                          98 : (96 - buf[offset]);
 184                                 hdmi_add_vic(vic_2d, head);
 185                         }
 186                         offset++;
 187                 }
 188         }
 189
 190         if (buf[0] & 0x80) {
 191                 /* 3d supported */
 192                 len += (buf[1] & 0x1F) + 2;
 193                 if (((buf[0] & 0x60) == 0x40) || ((buf[0] & 0x60) == 0x20)) {
 194                         format_3d = buf[offset++] << 8;
 195                         format_3d |= buf[offset++];
 196                         if ((buf[0] & 0x60) == 0x20) {
 197                                 vic_mask = 0xFFFF;
 198                         } else {
 199                                 vic_mask  = buf[offset++] << 8;
 200                                 vic_mask |= buf[offset++];
 201                         }
 202                 } else {
 203                         format_3d = 0;
 204                         vic_mask = 0;
 205                 }
 206
 207                 for (i = 0; i < 16; i++) {
 208                         if (vic_mask & (1 << i)) {
 209                                 j = 0;
 210                                 for (pos = (head)->next; pos != (head);
 211                                         pos = pos->next) {
 212                                         if (j++ == i) {
 213                                                 modelist =
 214                         list_entry(pos, struct display_modelist, list);
 215                                                 modelist->format_3d = format_3d;
 216                                                 break;
 217                                         }
 218                                 }
 219                         }
 220                 }
 221                 while (offset < len) {
 222                         vic_2d = (buf[offset] & 0xF0) >> 4;
 223                         structure_3d = (buf[offset++] & 0x0F);
 224                         j = 0;
 225                         for (pos = (head)->next; pos != (head);
 226                                 pos = pos->next) {
 227                                 j++;
 228                                 if (j == vic_2d) {
 229                                         modelist =
 230                                 list_entry(pos, struct display_modelist, list);
 231                                         modelist->format_3d |=
 232                                                 (1 << structure_3d);
 233                                         if (structure_3d & 0x08)
 234                                                 modelist->detail_3d =
 235                                                 (buf[offset++] & 0xF0) >> 4;
 236                                         break;
 237                                 }
 238                         }
 239                 }
 240                 /* mandatory formats */
 241                 for (pos = (head)->next; pos != (head); pos = pos->next) {
 242                         modelist = list_entry(pos,
 243                                               struct display_modelist,
 244                                               list);
 245                         if (modelist->vic == HDMI_1920X1080P_24HZ ||
 246                             modelist->vic == HDMI_1280X720P_60HZ ||
 247                             modelist->vic == HDMI_1280X720P_50HZ) {
 248                                 modelist->format_3d |=
 249                                         (1 << HDMI_3D_FRAME_PACKING) |
 250                                         (1 << HDMI_3D_TOP_BOOTOM);
 251                         } else if (modelist->vic == HDMI_1920X1080I_60HZ ||
 252                                    modelist->vic == HDMI_1920X1080I_50HZ) {
 253                                 modelist->format_3d |=
 254                                         (1 << HDMI_3D_SIDE_BY_SIDE_HALF);
 255                         }
 256                 }
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int hdmi_edmi_parse_vsdb(unsigned char *buf, struct hdmi_edid *pedid,
 263                                 int cur_offset, int IEEEOUI)
 264 {
 265         int count, buf_offset;
 266
 267         count = buf[cur_offset] & 0x1F;
 268         switch (IEEEOUI) {
 269         case 0x0c03:
 270                 pedid->sink_hdmi = 1;
 271                 pedid->cecaddress = buf[cur_offset + 5];
 272                 pedid->cecaddress |= buf[cur_offset + 4] << 8;
 273                 EDBG("[CEA] CEC Physical address is 0x%08x.\n",
 274                      pedid->cecaddress);
 275                 if (count > 6)
 276                         pedid->deepcolor = (buf[cur_offset + 6] >> 3) & 0x0F;
 277                 if (count > 7) {
 278                         pedid->maxtmdsclock = buf[cur_offset + 7] * 5000000;
 279                         EDBG("[CEA] maxtmdsclock is %d.\n",
 280                              pedid->maxtmdsclock);
 281                 }
 282                 if (count > 8) {
 283                         pedid->fields_present = buf[cur_offset + 8];
 284                         EDBG("[CEA] fields_present is 0x%02x.\n",
 285                              pedid->fields_present);
 286                 }
 287                 buf_offset = cur_offset + 9;
 288                 if (pedid->fields_present & 0x80) {
 289                         pedid->video_latency = buf[buf_offset++];
 290                         pedid->audio_latency = buf[buf_offset++];
 291                 }
 292                 if (pedid->fields_present & 0x40) {
 293                         pedid->interlaced_video_latency = buf[buf_offset++];
 294                         pedid->interlaced_audio_latency = buf[buf_offset++];
 295                 }
 296                 if (pedid->fields_present & 0x20) {
 297                         hdmi_edid_parse_3dinfo(buf + buf_offset,
 298                                                &pedid->modelist);
 299                 }
 300                 break;
 301         case 0xc45dd8:
 302                 pedid->sink_hdmi = 1;
 303                 pedid->hf_vsdb_version = buf[cur_offset + 4];
 304                 switch (pedid->hf_vsdb_version) {
 305                 case 1:/*compliant with HDMI Specification 2.0*/
 306                         pedid->maxtmdsclock =
 307                                 buf[cur_offset + 5] * 5000000;
 308                         EDBG("[CEA] maxtmdsclock is %d.\n",
 309                              pedid->maxtmdsclock);
 310                         pedid->scdc_present = buf[cur_offset + 6] >> 7;
 311                         pedid->rr_capable =
 312                                 (buf[cur_offset + 6] & 0x40) >> 6;
 313                         pedid->lte_340mcsc_scramble =
 314                                 (buf[cur_offset + 6] & 0x08) >> 3;
 315                         pedid->independent_view =
 316                                 (buf[cur_offset + 6] & 0x04) >> 2;
 317                         pedid->dual_view =
 318                                 (buf[cur_offset + 6] & 0x02) >> 1;
 319                         pedid->osd_disparity_3d =
 320                                 buf[cur_offset + 6] & 0x01;
 321                         pedid->deepcolor_420 =
 322                                 (buf[cur_offset + 7] & 0x7) << 1;
 323                         break;
 324                 default:
 325                         pr_info("hf_vsdb_version = %d\n",
 326                                 pedid->hf_vsdb_version);
 327                         break;
 328                 }
 329                 break;
 330         default:
 331                 pr_info("IEEOUT = 0x%x\n", IEEEOUI);
 332                 break;
 333         }
 334         return 0;
 335 }
 336
 337 static void hdmi_edid_parse_yuv420cmdb(unsigned char *buf, int count,
 338                                        struct list_head *head)
 339 {
 340         struct list_head *pos;
 341         struct display_modelist *modelist;
 342         int i, j, yuv420_mask = 0, vic;
 343
 344         if (count == 1) {
 345                 list_for_each(pos, head) {
 346                         modelist =
 347                                 list_entry(pos, struct display_modelist, list);
 348                         vic = modelist->vic | HDMI_VIDEO_YUV420;
 349                         hdmi_add_vic(vic, head);
 350                 }
 351         } else {
 352                 for (i = 0; i < count - 1; i++) {
 353                         EDBG("vic which support yuv420 mode is %x\n", buf[i]);
 354                         yuv420_mask |= buf[i] << (8 * i);
 355                 }
 356                 for (i = 0; i < 32; i++) {
 357                         if (!(yuv420_mask & (1 << i)))
 358                                 continue;
 359                         j = 0;
 360                         list_for_each(pos, head) {
 361                                 if (j++ == i) {
 362                                         modelist =
 363                                 list_entry(pos, struct display_modelist, list);
 364                                         vic = modelist->vic |
 365                                               HDMI_VIDEO_YUV420;
 366                                         hdmi_add_vic(vic, head);
 367                                         break;
 368                                 }
 369                         }
 370                 }
 371         }
 372 }
 373
 374 /* Parse CEA 861 Serial Extension. */
 375 static int hdmi_edid_parse_extensions_cea(unsigned char *buf,
 376                                           struct hdmi_edid *pedid)
 377 {
 378         unsigned int ddc_offset, native_dtd_num, cur_offset = 4;
 379         unsigned int tag, IEEEOUI = 0, count, i;
 380         struct fb_videomode *vmode;
 381
 382         if (!buf)
 383                 return E_HDMI_EDID_PARAM;
 384
 385         /* Check ces extension version */
 386         if (buf[1] != 3) {
 387                 pr_err("[CEA] error version.\n");
 388                 return E_HDMI_EDID_VERSION;
 389         }
 390
 391         ddc_offset = buf[2];
 392         pedid->baseaudio_support = (buf[3] >> 6) & 0x01;
 393         pedid->ycbcr444 = (buf[3] >> 5) & 0x01;
 394         pedid->ycbcr422 = (buf[3] >> 4) & 0x01;
 395         native_dtd_num = buf[3] & 0x0F;
 396         /* Parse data block */
 397         while (cur_offset < ddc_offset) {
 398                 tag = buf[cur_offset] >> 5;
 399                 count = buf[cur_offset] & 0x1F;
 400                 switch (tag) {
 401                 case 0x02:      /* Video Data Block */
 402                         EDBG("[CEA] Video Data Block.\n");
 403                         hdmi_edid_get_cea_svd(buf + cur_offset, pedid);
 404                         break;
 405                 case 0x01:      /* Audio Data Block */
 406                         EDBG("[CEA] Audio Data Block.\n");
 407                         hdmi_edid_parse_cea_sad(buf + cur_offset, pedid);
 408                         break;
 409                 case 0x04:      /* Speaker Allocation Data Block */
 410                         EDBG("[CEA] Speaker Allocatio Data Block.\n");
 411                         break;
 412                 case 0x03:      /* Vendor Specific Data Block */
 413                         EDBG("[CEA] Vendor Specific Data Block.\n");
 414
 415                         IEEEOUI = buf[cur_offset + 3];
 416                         IEEEOUI <<= 8;
 417                         IEEEOUI += buf[cur_offset + 2];
 418                         IEEEOUI <<= 8;
 419                         IEEEOUI += buf[cur_offset + 1];
 420                         EDBG("[CEA] IEEEOUI is 0x%08x.\n", IEEEOUI);
 421
 422                         hdmi_edmi_parse_vsdb(buf, pedid,
 423                                              cur_offset, IEEEOUI);
 424                         break;
 425                 case 0x05:      /* VESA DTC Data Block */
 426                         EDBG("[CEA] VESA DTC Data Block.\n");
 427                         break;
 428                 case 0x07:      /* Use Extended Tag */
 429                         EDBG("[CEA] Use Extended Tag Data Block %02x.\n",
 430                              buf[cur_offset + 1]);
 431                         switch (buf[cur_offset + 1]) {
 432                         case 0x00:
 433                                 EDBG("[CEA] Video Capability Data Block\n");
 434                                 EDBG("value is %02x\n", buf[cur_offset + 2]);
 435                                 break;
 436                         case 0x05:
 437                                 EDBG("[CEA] Colorimetry Data Block\n");
 438                                 EDBG("value is %02x\n", buf[cur_offset + 2]);
 439                                 pedid->colorimetry = buf[cur_offset + 2];
 440                                 break;
 441                         case 0x0e:
 442                                 EDBG("[CEA] YCBCR 4:2:0 Video Data Block\n");
 443                                 for (i = 0; i < count - 1; i++) {
 444                                         EDBG("mode is %d\n",
 445                                              buf[cur_offset + 2 + i]);
 446                                         pedid->ycbcr420 = 1;
 447                                         IEEEOUI = buf[cur_offset + 2 + i] |
 448                                                   HDMI_VIDEO_YUV420;
 449                                         hdmi_add_vic(IEEEOUI,
 450                                                      &pedid->modelist);
 451                                 }
 452                                 break;
 453                         case 0x0f:
 454                                 EDBG("[CEA] YCBCR 4:2:0 Capability Map Data\n");
 455                                 hdmi_edid_parse_yuv420cmdb(&buf[cur_offset + 2],
 456                                                            count,
 457                                                            &pedid->modelist);
 458                                 pedid->ycbcr420 = 1;
 459                                 break;
 460                         }
 461                         break;
 462                 default:
 463                         pr_err("[CEA] unkowned data block tag.\n");
 464                         break;
 465                 }
 466                 cur_offset += (buf[cur_offset] & 0x1F) + 1;
 467         }
 468
 469         /* Parse DTD */
 470         vmode = kmalloc(sizeof(*vmode), GFP_KERNEL);
 471
 472         if (!vmode)
 473                 return E_HDMI_EDID_SUCCESS;
 474         while (ddc_offset < HDMI_EDID_BLOCK_SIZE - 2) {
 475                 if (!buf[ddc_offset] && !buf[ddc_offset + 1])
 476                         break;
 477                 memset(vmode, 0, sizeof(struct fb_videomode));
 478                 hdmi_edid_parse_dtd(buf + ddc_offset, vmode);
 479                 hdmi_add_vic(hdmi_videomode_to_vic(vmode), &pedid->modelist);
 480                 ddc_offset += 18;
 481         }
 482         kfree(vmode);
 483
 484         return E_HDMI_EDID_SUCCESS;
 485 }
 486
 487 int hdmi_edid_parse_extensions(unsigned char *buf, struct hdmi_edid *pedid)
 488 {
 489         int rc;
 490
 491         if (!buf || !pedid)
 492                 return E_HDMI_EDID_PARAM;
 493
 494         /* Checksum */
 495         rc = hdmi_edid_checksum(buf);
 496         if (rc != E_HDMI_EDID_SUCCESS) {
 497                 pr_err("[EDID] extensions block checksum error\n");
 498                 return E_HDMI_EDID_CHECKSUM;
 499         }
 500
 501         switch (buf[0]) {
 502         case 0xF0:
 503                 EDBG("[EDID-EXTEND] Iextensions block map.\n");
 504                 break;
 505         case 0x02:
 506                 EDBG("[EDID-EXTEND] CEA 861 Series Extension.\n");
 507                 hdmi_edid_parse_extensions_cea(buf, pedid);
 508                 break;
 509         case 0x10:
 510                 EDBG("[EDID-EXTEND] Video Timing Block Extension.\n");
 511                 break;
 512         case 0x40:
 513                 EDBG("[EDID-EXTEND] Display Information Extension.\n");
 514                 break;
 515         case 0x50:
 516                 EDBG("[EDID-EXTEND] Localized String Extension.\n");
 517                 break;
 518         case 0x60:
 519                 EDBG("[EDID-EXTEND] Digital Packet Video Link Extension.\n");
 520                 break;
 521         default:
 522                 pr_err("[EDID-EXTEND] Unkowned Extension.\n");
 523                 return E_HDMI_EDID_UNKOWNDATA;
 524         }
 525
 526         return E_HDMI_EDID_SUCCESS;
 527 }