Subversion Repositories Kolibri OS

Rev

Rev 1125 | Rev 1221 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Luc Verhaegen (quirks list)
  3.  * Copyright (c) 2007-2008 Intel Corporation
  4.  *   Jesse Barnes <jesse.barnes@intel.com>
  5.  *
  6.  * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
  7.  * FB layer.
  8.  *   Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
  9.  *
  10.  * Permission is hereby granted, free of charge, to any person obtaining a
  11.  * copy of this software and associated documentation files (the "Software"),
  12.  * to deal in the Software without restriction, including without limitation
  13.  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  14.  * and/or sell copies of the Software, and to permit persons to whom the
  15.  * Software is furnished to do so, subject to the following conditions:
  16.  *
  17.  * The above copyright notice and this permission notice (including the
  18.  * next paragraph) shall be included in all copies or substantial portions
  19.  * of the Software.
  20.  *
  21.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23.  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  24.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  26.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  27.  * DEALINGS IN THE SOFTWARE.
  28.  */
  29. //#include <linux/kernel.h>
  30. #include <types.h>
  31. #include <list.h>
  32.  
  33. #include <linux/i2c.h>
  34. #include <linux/i2c-algo-bit.h>
  35. #include "drmP.h"
  36. #include "drm_edid.h"
  37.  
  38. /*
  39.  * TODO:
  40.  *   - support EDID 1.4 (incl. CE blocks)
  41.  */
  42.  
  43. /*
  44.  * EDID blocks out in the wild have a variety of bugs, try to collect
  45.  * them here (note that userspace may work around broken monitors first,
  46.  * but fixes should make their way here so that the kernel "just works"
  47.  * on as many displays as possible).
  48.  */
  49.  
  50. /* First detailed mode wrong, use largest 60Hz mode */
  51. #define EDID_QUIRK_PREFER_LARGE_60              (1 << 0)
  52. /* Reported 135MHz pixel clock is too high, needs adjustment */
  53. #define EDID_QUIRK_135_CLOCK_TOO_HIGH           (1 << 1)
  54. /* Prefer the largest mode at 75 Hz */
  55. #define EDID_QUIRK_PREFER_LARGE_75              (1 << 2)
  56. /* Detail timing is in cm not mm */
  57. #define EDID_QUIRK_DETAILED_IN_CM               (1 << 3)
  58. /* Detailed timing descriptors have bogus size values, so just take the
  59.  * maximum size and use that.
  60.  */
  61. #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE    (1 << 4)
  62. /* Monitor forgot to set the first detailed is preferred bit. */
  63. #define EDID_QUIRK_FIRST_DETAILED_PREFERRED     (1 << 5)
  64. /* use +hsync +vsync for detailed mode */
  65. #define EDID_QUIRK_DETAILED_SYNC_PP             (1 << 6)
  66. /* define the number of Extension EDID block */
  67. #define MAX_EDID_EXT_NUM 4
  68.  
  69. #define LEVEL_DMT       0
  70. #define LEVEL_GTF       1
  71. #define LEVEL_CVT       2
  72.  
  73. static struct edid_quirk {
  74.         char *vendor;
  75.         int product_id;
  76.         u32 quirks;
  77. } edid_quirk_list[] = {
  78.         /* Acer AL1706 */
  79.         { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
  80.         /* Acer F51 */
  81.         { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
  82.         /* Unknown Acer */
  83.         { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
  84.  
  85.         /* Belinea 10 15 55 */
  86.         { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
  87.         { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
  88.  
  89.         /* Envision Peripherals, Inc. EN-7100e */
  90.         { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
  91.  
  92.         /* Funai Electronics PM36B */
  93.         { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
  94.           EDID_QUIRK_DETAILED_IN_CM },
  95.  
  96.         /* LG Philips LCD LP154W01-A5 */
  97.         { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
  98.         { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
  99.  
  100.         /* Philips 107p5 CRT */
  101.         { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
  102.  
  103.         /* Proview AY765C */
  104.         { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
  105.  
  106.         /* Samsung SyncMaster 205BW.  Note: irony */
  107.         { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
  108.         /* Samsung SyncMaster 22[5-6]BW */
  109.         { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
  110.         { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
  111. };
  112.  
  113.  
  114. /* Valid EDID header has these bytes */
  115. static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
  116.  
  117. /**
  118.  * edid_is_valid - sanity check EDID data
  119.  * @edid: EDID data
  120.  *
  121.  * Sanity check the EDID block by looking at the header, the version number
  122.  * and the checksum.  Return 0 if the EDID doesn't check out, or 1 if it's
  123.  * valid.
  124.  */
  125. static bool edid_is_valid(struct edid *edid)
  126. {
  127.         int i;
  128.         u8 csum = 0;
  129.         u8 *raw_edid = (u8 *)edid;
  130.  
  131.         if (memcmp(edid->header, edid_header, sizeof(edid_header)))
  132.                 goto bad;
  133.         if (edid->version != 1) {
  134.                 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
  135.                 goto bad;
  136.         }
  137.         if (edid->revision > 4)
  138.                 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
  139.  
  140.         for (i = 0; i < EDID_LENGTH; i++)
  141.                 csum += raw_edid[i];
  142.         if (csum) {
  143.                 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
  144.                 goto bad;
  145.         }
  146.  
  147.         return 1;
  148.  
  149. bad:
  150.         if (raw_edid) {
  151.                 DRM_ERROR("Raw EDID:\n");
  152. //       print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
  153. //       printk("\n");
  154.         }
  155.         return 0;
  156. }
  157.  
  158. /**
  159.  * edid_vendor - match a string against EDID's obfuscated vendor field
  160.  * @edid: EDID to match
  161.  * @vendor: vendor string
  162.  *
  163.  * Returns true if @vendor is in @edid, false otherwise
  164.  */
  165. static bool edid_vendor(struct edid *edid, char *vendor)
  166. {
  167.         char edid_vendor[3];
  168.  
  169.         edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
  170.         edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
  171.                           ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
  172.         edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
  173.  
  174.         return !strncmp(edid_vendor, vendor, 3);
  175. }
  176.  
  177. /**
  178.  * edid_get_quirks - return quirk flags for a given EDID
  179.  * @edid: EDID to process
  180.  *
  181.  * This tells subsequent routines what fixes they need to apply.
  182.  */
  183. static u32 edid_get_quirks(struct edid *edid)
  184. {
  185.         struct edid_quirk *quirk;
  186.         int i;
  187.  
  188.         for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
  189.                 quirk = &edid_quirk_list[i];
  190.  
  191.                 if (edid_vendor(edid, quirk->vendor) &&
  192.                     (EDID_PRODUCT_ID(edid) == quirk->product_id))
  193.                         return quirk->quirks;
  194.         }
  195.  
  196.         return 0;
  197. }
  198.  
  199. #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
  200. #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
  201.  
  202.  
  203. /**
  204.  * edid_fixup_preferred - set preferred modes based on quirk list
  205.  * @connector: has mode list to fix up
  206.  * @quirks: quirks list
  207.  *
  208.  * Walk the mode list for @connector, clearing the preferred status
  209.  * on existing modes and setting it anew for the right mode ala @quirks.
  210.  */
  211. static void edid_fixup_preferred(struct drm_connector *connector,
  212.                                  u32 quirks)
  213. {
  214.         struct drm_display_mode *t, *cur_mode, *preferred_mode;
  215.         int target_refresh = 0;
  216.  
  217.         if (list_empty(&connector->probed_modes))
  218.                 return;
  219.  
  220.         if (quirks & EDID_QUIRK_PREFER_LARGE_60)
  221.                 target_refresh = 60;
  222.         if (quirks & EDID_QUIRK_PREFER_LARGE_75)
  223.                 target_refresh = 75;
  224.  
  225.         preferred_mode = list_first_entry(&connector->probed_modes,
  226.                                           struct drm_display_mode, head);
  227.  
  228.         list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
  229.                 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
  230.  
  231.                 if (cur_mode == preferred_mode)
  232.                         continue;
  233.  
  234.                 /* Largest mode is preferred */
  235.                 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
  236.                         preferred_mode = cur_mode;
  237.  
  238.                 /* At a given size, try to get closest to target refresh */
  239.                 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
  240.                     MODE_REFRESH_DIFF(cur_mode, target_refresh) <
  241.                     MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
  242.                         preferred_mode = cur_mode;
  243.                 }
  244.         }
  245.  
  246.         preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
  247. }
  248.  
  249. /*
  250.  * Add the Autogenerated from the DMT spec.
  251.  * This table is copied from xfree86/modes/xf86EdidModes.c.
  252.  * But the mode with Reduced blank feature is deleted.
  253.  */
  254. static struct drm_display_mode drm_dmt_modes[] = {
  255.         /* 640x350@85Hz */
  256.         { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
  257.                    736, 832, 0, 350, 382, 385, 445, 0,
  258.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
  259.         /* 640x400@85Hz */
  260.         { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
  261.                    736, 832, 0, 400, 401, 404, 445, 0,
  262.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  263.         /* 720x400@85Hz */
  264.         { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
  265.                    828, 936, 0, 400, 401, 404, 446, 0,
  266.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  267.         /* 640x480@60Hz */
  268.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
  269.                    752, 800, 0, 480, 489, 492, 525, 0,
  270.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  271.         /* 640x480@72Hz */
  272.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
  273.                    704, 832, 0, 480, 489, 492, 520, 0,
  274.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  275.         /* 640x480@75Hz */
  276.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
  277.                    720, 840, 0, 480, 481, 484, 500, 0,
  278.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  279.         /* 640x480@85Hz */
  280.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
  281.                    752, 832, 0, 480, 481, 484, 509, 0,
  282.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  283.         /* 800x600@56Hz */
  284.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
  285.                    896, 1024, 0, 600, 601, 603, 625, 0,
  286.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  287.         /* 800x600@60Hz */
  288.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
  289.                    968, 1056, 0, 600, 601, 605, 628, 0,
  290.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  291.         /* 800x600@72Hz */
  292.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
  293.                    976, 1040, 0, 600, 637, 643, 666, 0,
  294.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  295.         /* 800x600@75Hz */
  296.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
  297.                    896, 1056, 0, 600, 601, 604, 625, 0,
  298.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  299.         /* 800x600@85Hz */
  300.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
  301.                    896, 1048, 0, 600, 601, 604, 631, 0,
  302.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  303.         /* 848x480@60Hz */
  304.         { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
  305.                    976, 1088, 0, 480, 486, 494, 517, 0,
  306.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  307.         /* 1024x768@43Hz, interlace */
  308.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
  309.                    1208, 1264, 0, 768, 768, 772, 817, 0,
  310.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
  311.                         DRM_MODE_FLAG_INTERLACE) },
  312.         /* 1024x768@60Hz */
  313.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
  314.                    1184, 1344, 0, 768, 771, 777, 806, 0,
  315.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  316.         /* 1024x768@70Hz */
  317.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
  318.                    1184, 1328, 0, 768, 771, 777, 806, 0,
  319.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
  320.         /* 1024x768@75Hz */
  321.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
  322.                    1136, 1312, 0, 768, 769, 772, 800, 0,
  323.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  324.         /* 1024x768@85Hz */
  325.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
  326.                    1072, 1376, 0, 768, 769, 772, 808, 0,
  327.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  328.         /* 1152x864@75Hz */
  329.         { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
  330.                    1344, 1600, 0, 864, 865, 868, 900, 0,
  331.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  332.         /* 1280x768@60Hz */
  333.         { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
  334.                    1472, 1664, 0, 768, 771, 778, 798, 0,
  335.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  336.         /* 1280x768@75Hz */
  337.         { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
  338.                    1488, 1696, 0, 768, 771, 778, 805, 0,
  339.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
  340.         /* 1280x768@85Hz */
  341.         { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
  342.                    1496, 1712, 0, 768, 771, 778, 809, 0,
  343.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  344.         /* 1280x800@60Hz */
  345.         { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
  346.                    1480, 1680, 0, 800, 803, 809, 831, 0,
  347.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
  348.         /* 1280x800@75Hz */
  349.         { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
  350.                    1488, 1696, 0, 800, 803, 809, 838, 0,
  351.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  352.         /* 1280x800@85Hz */
  353.         { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
  354.                    1496, 1712, 0, 800, 803, 809, 843, 0,
  355.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  356.         /* 1280x960@60Hz */
  357.         { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
  358.                    1488, 1800, 0, 960, 961, 964, 1000, 0,
  359.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  360.         /* 1280x960@85Hz */
  361.         { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
  362.                    1504, 1728, 0, 960, 961, 964, 1011, 0,
  363.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  364.         /* 1280x1024@60Hz */
  365.         { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
  366.                    1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
  367.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  368.         /* 1280x1024@75Hz */
  369.         { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
  370.                    1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
  371.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  372.         /* 1280x1024@85Hz */
  373.         { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
  374.                    1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
  375.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  376.         /* 1360x768@60Hz */
  377.         { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
  378.                    1536, 1792, 0, 768, 771, 777, 795, 0,
  379.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  380.         /* 1440x1050@60Hz */
  381.         { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
  382.                    1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
  383.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  384.         /* 1440x1050@75Hz */
  385.         { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
  386.                    1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
  387.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  388.         /* 1440x1050@85Hz */
  389.         { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
  390.                    1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
  391.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  392.         /* 1440x900@60Hz */
  393.         { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
  394.                    1672, 1904, 0, 900, 903, 909, 934, 0,
  395.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  396.         /* 1440x900@75Hz */
  397.         { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
  398.                    1688, 1936, 0, 900, 903, 909, 942, 0,
  399.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  400.         /* 1440x900@85Hz */
  401.         { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
  402.                    1696, 1952, 0, 900, 903, 909, 948, 0,
  403.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  404.         /* 1600x1200@60Hz */
  405.         { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
  406.                    1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
  407.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  408.         /* 1600x1200@65Hz */
  409.         { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
  410.                    1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
  411.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  412.         /* 1600x1200@70Hz */
  413.         { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
  414.                    1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
  415.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  416.         /* 1600x1200@75Hz */
  417.         { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
  418.                    1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
  419.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  420.         /* 1600x1200@85Hz */
  421.         { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
  422.                    1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
  423.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
  424.         /* 1680x1050@60Hz */
  425.         { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
  426.                    1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
  427.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  428.         /* 1680x1050@75Hz */
  429.         { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
  430.                    1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
  431.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  432.         /* 1680x1050@85Hz */
  433.         { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
  434.                    1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
  435.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  436.         /* 1792x1344@60Hz */
  437.         { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
  438.                    2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
  439.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  440.         /* 1729x1344@75Hz */
  441.         { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
  442.                    2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
  443.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  444.         /* 1853x1392@60Hz */
  445.         { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
  446.                    2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
  447.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  448.         /* 1856x1392@75Hz */
  449.         { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
  450.                    2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
  451.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  452.         /* 1920x1200@60Hz */
  453.         { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
  454.                    2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
  455.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  456.         /* 1920x1200@75Hz */
  457.         { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
  458.                    2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
  459.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  460.         /* 1920x1200@85Hz */
  461.         { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
  462.                    2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
  463.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  464.         /* 1920x1440@60Hz */
  465.         { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
  466.                    2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
  467.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  468.         /* 1920x1440@75Hz */
  469.         { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
  470.                    2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
  471.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  472.         /* 2560x1600@60Hz */
  473.         { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
  474.                    3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
  475.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  476.         /* 2560x1600@75HZ */
  477.         { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
  478.                    3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
  479.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  480.         /* 2560x1600@85HZ */
  481.         { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
  482.                    3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
  483.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
  484. };
  485.  
  486. static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
  487.                         int hsize, int vsize, int fresh)
  488. {
  489.         int i, count;
  490.         struct drm_display_mode *ptr, *mode;
  491.  
  492.         count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
  493.         mode = NULL;
  494.         for (i = 0; i < count; i++) {
  495.                 ptr = &drm_dmt_modes[i];
  496.                 if (hsize == ptr->hdisplay &&
  497.                         vsize == ptr->vdisplay &&
  498.                         fresh == drm_mode_vrefresh(ptr)) {
  499.                         /* get the expected default mode */
  500.                         mode = drm_mode_duplicate(dev, ptr);
  501.                         break;
  502.                 }
  503.         }
  504.         return mode;
  505. }
  506. /**
  507.  * drm_mode_std - convert standard mode info (width, height, refresh) into mode
  508.  * @t: standard timing params
  509.  *
  510.  * Take the standard timing params (in this case width, aspect, and refresh)
  511.  * and convert them into a real mode using CVT.
  512.  *
  513.  * Punts for now, but should eventually use the FB layer's CVT based mode
  514.  * generation code.
  515.  */
  516. struct drm_display_mode *drm_mode_std(struct drm_device *dev,
  517.                                       struct std_timing *t,
  518.                                       int timing_level)
  519. {
  520.         struct drm_display_mode *mode;
  521.         int hsize, vsize;
  522.         int vrefresh_rate;
  523.         unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
  524.                 >> EDID_TIMING_ASPECT_SHIFT;
  525.         unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
  526.                 >> EDID_TIMING_VFREQ_SHIFT;
  527.  
  528.         /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
  529.         hsize = t->hsize * 8 + 248;
  530.         /* vrefresh_rate = vfreq + 60 */
  531.         vrefresh_rate = vfreq + 60;
  532.         /* the vdisplay is calculated based on the aspect ratio */
  533.  
  534.         if (aspect_ratio == 0)
  535.                 vsize = (hsize * 10) / 16;
  536.         else if (aspect_ratio == 1)
  537.                 vsize = (hsize * 3) / 4;
  538.         else if (aspect_ratio == 2)
  539.                 vsize = (hsize * 4) / 5;
  540.         else
  541.                 vsize = (hsize * 9) / 16;
  542.         /* HDTV hack */
  543.         if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
  544.                 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
  545.                 mode->hdisplay = 1366;
  546.                 mode->vsync_start = mode->vsync_start - 1;
  547.                 mode->vsync_end = mode->vsync_end - 1;
  548.                 return mode;
  549.         }
  550.         mode = NULL;
  551.         /* check whether it can be found in default mode table */
  552.         mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
  553.         if (mode)
  554.                 return mode;
  555.  
  556.         switch (timing_level) {
  557.         case LEVEL_DMT:
  558.                 break;
  559.         case LEVEL_GTF:
  560.                 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
  561.                 break;
  562.         case LEVEL_CVT:
  563.                 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
  564.                 break;
  565.         }
  566.         return mode;
  567. }
  568.  
  569. /**
  570.  * drm_mode_detailed - create a new mode from an EDID detailed timing section
  571.  * @dev: DRM device (needed to create new mode)
  572.  * @edid: EDID block
  573.  * @timing: EDID detailed timing info
  574.  * @quirks: quirks to apply
  575.  *
  576.  * An EDID detailed timing block contains enough info for us to create and
  577.  * return a new struct drm_display_mode.
  578.  */
  579. static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
  580.                                                   struct edid *edid,
  581.                                                   struct detailed_timing *timing,
  582.                                                   u32 quirks)
  583. {
  584.         struct drm_display_mode *mode;
  585.         struct detailed_pixel_timing *pt = &timing->data.pixel_data;
  586.         unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
  587.         unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
  588.         unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
  589.         unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
  590.         unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
  591.         unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
  592.         unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
  593.         unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
  594.  
  595.         /* ignore tiny modes */
  596.         if (hactive < 64 || vactive < 64)
  597.                 return NULL;
  598.  
  599.         if (pt->misc & DRM_EDID_PT_STEREO) {
  600.                 printk(KERN_WARNING "stereo mode not supported\n");
  601.                 return NULL;
  602.         }
  603.         if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
  604.                 printk(KERN_WARNING "integrated sync not supported\n");
  605.                 return NULL;
  606.         }
  607.  
  608.         mode = drm_mode_create(dev);
  609.         if (!mode)
  610.                 return NULL;
  611.  
  612.         mode->type = DRM_MODE_TYPE_DRIVER;
  613.  
  614.         if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
  615.                 timing->pixel_clock = cpu_to_le16(1088);
  616.  
  617.         mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
  618.  
  619.         mode->hdisplay = hactive;
  620.         mode->hsync_start = mode->hdisplay + hsync_offset;
  621.         mode->hsync_end = mode->hsync_start + hsync_pulse_width;
  622.         mode->htotal = mode->hdisplay + hblank;
  623.  
  624.         mode->vdisplay = vactive;
  625.         mode->vsync_start = mode->vdisplay + vsync_offset;
  626.         mode->vsync_end = mode->vsync_start + vsync_pulse_width;
  627.         mode->vtotal = mode->vdisplay + vblank;
  628.  
  629.         drm_mode_set_name(mode);
  630.  
  631.         if (pt->misc & DRM_EDID_PT_INTERLACED)
  632.                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
  633.  
  634.         if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
  635.                 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
  636.         }
  637.  
  638.         mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
  639.                 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
  640.         mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
  641.                 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
  642.  
  643.         mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
  644.         mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
  645.  
  646.         if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
  647.                 mode->width_mm *= 10;
  648.                 mode->height_mm *= 10;
  649.         }
  650.  
  651.         if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
  652.                 mode->width_mm = edid->width_cm * 10;
  653.                 mode->height_mm = edid->height_cm * 10;
  654.         }
  655.  
  656.         return mode;
  657. }
  658.  
  659. /*
  660.  * Detailed mode info for the EDID "established modes" data to use.
  661.  */
  662. static struct drm_display_mode edid_est_modes[] = {
  663.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
  664.                    968, 1056, 0, 600, 601, 605, 628, 0,
  665.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
  666.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
  667.                    896, 1024, 0, 600, 601, 603,  625, 0,
  668.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
  669.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
  670.                    720, 840, 0, 480, 481, 484, 500, 0,
  671.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
  672.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
  673.                    704,  832, 0, 480, 489, 491, 520, 0,
  674.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
  675.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
  676.                    768,  864, 0, 480, 483, 486, 525, 0,
  677.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
  678.         { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
  679.                    752, 800, 0, 480, 490, 492, 525, 0,
  680.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
  681.         { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
  682.                    846, 900, 0, 400, 421, 423,  449, 0,
  683.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
  684.         { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
  685.                    846,  900, 0, 400, 412, 414, 449, 0,
  686.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
  687.         { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
  688.                    1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
  689.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
  690.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
  691.                    1136, 1312, 0,  768, 769, 772, 800, 0,
  692.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
  693.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
  694.                    1184, 1328, 0,  768, 771, 777, 806, 0,
  695.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
  696.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
  697.                    1184, 1344, 0,  768, 771, 777, 806, 0,
  698.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
  699.         { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
  700.                    1208, 1264, 0, 768, 768, 776, 817, 0,
  701.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
  702.         { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
  703.                    928, 1152, 0, 624, 625, 628, 667, 0,
  704.                    DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
  705.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
  706.                    896, 1056, 0, 600, 601, 604,  625, 0,
  707.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
  708.         { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
  709.                    976, 1040, 0, 600, 637, 643, 666, 0,
  710.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
  711.         { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
  712.                    1344, 1600, 0,  864, 865, 868, 900, 0,
  713.                    DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
  714. };
  715.  
  716. #define EDID_EST_TIMINGS 16
  717. #define EDID_STD_TIMINGS 8
  718. #define EDID_DETAILED_TIMINGS 4
  719.  
  720. /**
  721.  * add_established_modes - get est. modes from EDID and add them
  722.  * @edid: EDID block to scan
  723.  *
  724.  * Each EDID block contains a bitmap of the supported "established modes" list
  725.  * (defined above).  Tease them out and add them to the global modes list.
  726.  */
  727. static int add_established_modes(struct drm_connector *connector, struct edid *edid)
  728. {
  729.         struct drm_device *dev = connector->dev;
  730.         unsigned long est_bits = edid->established_timings.t1 |
  731.                 (edid->established_timings.t2 << 8) |
  732.                 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
  733.         int i, modes = 0;
  734.  
  735.         for (i = 0; i <= EDID_EST_TIMINGS; i++)
  736.                 if (est_bits & (1<<i)) {
  737.                         struct drm_display_mode *newmode;
  738.                         newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
  739.                         if (newmode) {
  740.                                 drm_mode_probed_add(connector, newmode);
  741.                                 modes++;
  742.                         }
  743.                 }
  744.  
  745.         return modes;
  746. }
  747. /**
  748.  * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
  749.  * @edid: EDID block to scan
  750.  */
  751. static int standard_timing_level(struct edid *edid)
  752. {
  753.         if (edid->revision >= 2) {
  754.                 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
  755.                         return LEVEL_CVT;
  756.                 return LEVEL_GTF;
  757.         }
  758.         return LEVEL_DMT;
  759. }
  760.  
  761. /**
  762.  * add_standard_modes - get std. modes from EDID and add them
  763.  * @edid: EDID block to scan
  764.  *
  765.  * Standard modes can be calculated using the CVT standard.  Grab them from
  766.  * @edid, calculate them, and add them to the list.
  767.  */
  768. static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
  769. {
  770.         struct drm_device *dev = connector->dev;
  771.         int i, modes = 0;
  772.         int timing_level;
  773.  
  774.         timing_level = standard_timing_level(edid);
  775.  
  776.         for (i = 0; i < EDID_STD_TIMINGS; i++) {
  777.                 struct std_timing *t = &edid->standard_timings[i];
  778.                 struct drm_display_mode *newmode;
  779.  
  780.                 /* If std timings bytes are 1, 1 it's empty */
  781.                 if (t->hsize == 1 && t->vfreq_aspect == 1)
  782.                         continue;
  783.  
  784.                 newmode = drm_mode_std(dev, &edid->standard_timings[i],
  785.                                         timing_level);
  786.                 if (newmode) {
  787.                         drm_mode_probed_add(connector, newmode);
  788.                         modes++;
  789.                 }
  790.         }
  791.  
  792.         return modes;
  793. }
  794.  
  795. /**
  796.  * add_detailed_modes - get detailed mode info from EDID data
  797.  * @connector: attached connector
  798.  * @edid: EDID block to scan
  799.  * @quirks: quirks to apply
  800.  *
  801.  * Some of the detailed timing sections may contain mode information.  Grab
  802.  * it and add it to the list.
  803.  */
  804. static int add_detailed_info(struct drm_connector *connector,
  805.                              struct edid *edid, u32 quirks)
  806. {
  807.         struct drm_device *dev = connector->dev;
  808.         int i, j, modes = 0;
  809.         int timing_level;
  810.  
  811.         timing_level = standard_timing_level(edid);
  812.  
  813.         for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
  814.                 struct detailed_timing *timing = &edid->detailed_timings[i];
  815.                 struct detailed_non_pixel *data = &timing->data.other_data;
  816.                 struct drm_display_mode *newmode;
  817.  
  818.                 /* X server check is version 1.1 or higher */
  819.                 if (edid->version == 1 && edid->revision >= 1 &&
  820.                     !timing->pixel_clock) {
  821.                 /* Other timing or info */
  822.                 switch (data->type) {
  823.                 case EDID_DETAIL_MONITOR_SERIAL:
  824.                         break;
  825.                 case EDID_DETAIL_MONITOR_STRING:
  826.                         break;
  827.                 case EDID_DETAIL_MONITOR_RANGE:
  828.                         /* Get monitor range data */
  829.                         break;
  830.                 case EDID_DETAIL_MONITOR_NAME:
  831.                         break;
  832.                 case EDID_DETAIL_MONITOR_CPDATA:
  833.                         break;
  834.                 case EDID_DETAIL_STD_MODES:
  835.                         /* Five modes per detailed section */
  836.                         for (j = 0; j < 5; i++) {
  837.                                 struct std_timing *std;
  838.                                 struct drm_display_mode *newmode;
  839.  
  840.                                 std = &data->data.timings[j];
  841.                                         newmode = drm_mode_std(dev, std,
  842.                                                                timing_level);
  843.                                 if (newmode) {
  844.                                         drm_mode_probed_add(connector, newmode);
  845.                                         modes++;
  846.                                 }
  847.                         }
  848.                         break;
  849.                 default:
  850.                         break;
  851.                 }
  852.                 } else {
  853.                         newmode = drm_mode_detailed(dev, edid, timing, quirks);
  854.                         if (!newmode)
  855.                                 continue;
  856.  
  857.                         /* First detailed mode is preferred */
  858.                         if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
  859.                                 newmode->type |= DRM_MODE_TYPE_PREFERRED;
  860.                         drm_mode_probed_add(connector, newmode);
  861.  
  862.                         modes++;
  863.                 }
  864.         }
  865.  
  866.         return modes;
  867. }
  868. /**
  869.  * add_detailed_mode_eedid - get detailed mode info from addtional timing
  870.  *                      EDID block
  871.  * @connector: attached connector
  872.  * @edid: EDID block to scan(It is only to get addtional timing EDID block)
  873.  * @quirks: quirks to apply
  874.  *
  875.  * Some of the detailed timing sections may contain mode information.  Grab
  876.  * it and add it to the list.
  877.  */
  878. static int add_detailed_info_eedid(struct drm_connector *connector,
  879.                              struct edid *edid, u32 quirks)
  880. {
  881.         struct drm_device *dev = connector->dev;
  882.         int i, j, modes = 0;
  883.         char *edid_ext = NULL;
  884.         struct detailed_timing *timing;
  885.         struct detailed_non_pixel *data;
  886.         struct drm_display_mode *newmode;
  887.         int edid_ext_num;
  888.         int start_offset, end_offset;
  889.         int timing_level;
  890.  
  891.         if (edid->version == 1 && edid->revision < 3) {
  892.                 /* If the EDID version is less than 1.3, there is no
  893.                  * extension EDID.
  894.                  */
  895.                 return 0;
  896.         }
  897.         if (!edid->extensions) {
  898.                 /* if there is no extension EDID, it is unnecessary to
  899.                  * parse the E-EDID to get detailed info
  900.                  */
  901.                 return 0;
  902.         }
  903.  
  904.         /* Chose real EDID extension number */
  905.         edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
  906.                        MAX_EDID_EXT_NUM : edid->extensions;
  907.  
  908.         /* Find CEA extension */
  909.         for (i = 0; i < edid_ext_num; i++) {
  910.                 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
  911.                 /* This block is CEA extension */
  912.                 if (edid_ext[0] == 0x02)
  913.                         break;
  914.         }
  915.  
  916.         if (i == edid_ext_num) {
  917.                 /* if there is no additional timing EDID block, return */
  918.                 return 0;
  919.         }
  920.  
  921.         /* Get the start offset of detailed timing block */
  922.         start_offset = edid_ext[2];
  923.         if (start_offset == 0) {
  924.                 /* If the start_offset is zero, it means that neither detailed
  925.                  * info nor data block exist. In such case it is also
  926.                  * unnecessary to parse the detailed timing info.
  927.                  */
  928.                 return 0;
  929.         }
  930.  
  931.         timing_level = standard_timing_level(edid);
  932.         end_offset = EDID_LENGTH;
  933.         end_offset -= sizeof(struct detailed_timing);
  934.         for (i = start_offset; i < end_offset;
  935.                         i += sizeof(struct detailed_timing)) {
  936.                 timing = (struct detailed_timing *)(edid_ext + i);
  937.                 data = &timing->data.other_data;
  938.                 /* Detailed mode timing */
  939.                 if (timing->pixel_clock) {
  940.                         newmode = drm_mode_detailed(dev, edid, timing, quirks);
  941.                         if (!newmode)
  942.                                 continue;
  943.  
  944.                         drm_mode_probed_add(connector, newmode);
  945.  
  946.                         modes++;
  947.                         continue;
  948.                 }
  949.  
  950.                 /* Other timing or info */
  951.                 switch (data->type) {
  952.                 case EDID_DETAIL_MONITOR_SERIAL:
  953.                         break;
  954.                 case EDID_DETAIL_MONITOR_STRING:
  955.                         break;
  956.                 case EDID_DETAIL_MONITOR_RANGE:
  957.                         /* Get monitor range data */
  958.                         break;
  959.                 case EDID_DETAIL_MONITOR_NAME:
  960.                         break;
  961.                 case EDID_DETAIL_MONITOR_CPDATA:
  962.                         break;
  963.                 case EDID_DETAIL_STD_MODES:
  964.                         /* Five modes per detailed section */
  965.                         for (j = 0; j < 5; i++) {
  966.                                 struct std_timing *std;
  967.                                 struct drm_display_mode *newmode;
  968.  
  969.                                 std = &data->data.timings[j];
  970.                                 newmode = drm_mode_std(dev, std, timing_level);
  971.                                 if (newmode) {
  972.                                         drm_mode_probed_add(connector, newmode);
  973.                                         modes++;
  974.                                 }
  975.                         }
  976.                         break;
  977.                 default:
  978.                         break;
  979.                 }
  980.         }
  981.  
  982.         return modes;
  983. }
  984.  
  985. #define DDC_ADDR 0x50
  986. /**
  987.  * Get EDID information via I2C.
  988.  *
  989.  * \param adapter : i2c device adaptor
  990.  * \param buf     : EDID data buffer to be filled
  991.  * \param len     : EDID data buffer length
  992.  * \return 0 on success or -1 on failure.
  993.  *
  994.  * Try to fetch EDID information by calling i2c driver function.
  995.  */
  996. int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
  997.                           unsigned char *buf, int len)
  998. {
  999.         unsigned char start = 0x0;
  1000.         struct i2c_msg msgs[] = {
  1001.                 {
  1002.                         .addr   = DDC_ADDR,
  1003.                         .flags  = 0,
  1004.                         .len    = 1,
  1005.                         .buf    = &start,
  1006.                 }, {
  1007.                         .addr   = DDC_ADDR,
  1008.                         .flags  = I2C_M_RD,
  1009.                         .len    = len,
  1010.                         .buf    = buf,
  1011.                 }
  1012.         };
  1013.  
  1014.         if (i2c_transfer(adapter, msgs, 2) == 2)
  1015.                 return 0;
  1016.  
  1017. //   dev_info(&adapter->dev, "unable to read EDID block.\n");
  1018.         return -1;
  1019. }
  1020. EXPORT_SYMBOL(drm_do_probe_ddc_edid);
  1021.  
  1022. static int drm_ddc_read_edid(struct drm_connector *connector,
  1023.                              struct i2c_adapter *adapter,
  1024.                              char *buf, int len)
  1025. {
  1026.         int ret;
  1027.  
  1028.         ret = drm_do_probe_ddc_edid(adapter, buf, len);
  1029.         if (ret != 0) {
  1030.                 goto end;
  1031.         }
  1032.         if (!edid_is_valid((struct edid *)buf)) {
  1033. //       dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
  1034. //            drm_get_connector_name(connector));
  1035.                 ret = -1;
  1036.         }
  1037. end:
  1038.         return ret;
  1039. }
  1040.  
  1041. /**
  1042.  * drm_get_edid - get EDID data, if available
  1043.  * @connector: connector we're probing
  1044.  * @adapter: i2c adapter to use for DDC
  1045.  *
  1046.  * Poke the given connector's i2c channel to grab EDID data if possible.
  1047.  *
  1048.  * Return edid data or NULL if we couldn't find any.
  1049.  */
  1050. struct edid *drm_get_edid(struct drm_connector *connector,
  1051.                           struct i2c_adapter *adapter)
  1052. {
  1053.         int ret;
  1054.         struct edid *edid;
  1055.  
  1056.         edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
  1057.                        GFP_KERNEL);
  1058.         if (edid == NULL) {
  1059. //       dev_warn(&connector->dev->pdev->dev,
  1060. //            "Failed to allocate EDID\n");
  1061.                 goto end;
  1062.         }
  1063.  
  1064.         /* Read first EDID block */
  1065.         ret = drm_ddc_read_edid(connector, adapter,
  1066.                                 (unsigned char *)edid, EDID_LENGTH);
  1067.         if (ret != 0)
  1068.                 goto clean_up;
  1069.  
  1070.         /* There are EDID extensions to be read */
  1071.         if (edid->extensions != 0) {
  1072.                 int edid_ext_num = edid->extensions;
  1073.  
  1074.                 if (edid_ext_num > MAX_EDID_EXT_NUM) {
  1075.  //          dev_warn(&connector->dev->pdev->dev,
  1076. //                "The number of extension(%d) is "
  1077. //                "over max (%d), actually read number (%d)\n",
  1078. //                edid_ext_num, MAX_EDID_EXT_NUM,
  1079. //                MAX_EDID_EXT_NUM);
  1080.                         /* Reset EDID extension number to be read */
  1081.                         edid_ext_num = MAX_EDID_EXT_NUM;
  1082.                 }
  1083.                 /* Read EDID including extensions too */
  1084.                 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
  1085.                                         EDID_LENGTH * (edid_ext_num + 1));
  1086.                 if (ret != 0)
  1087.                         goto clean_up;
  1088.  
  1089.         }
  1090.  
  1091.         connector->display_info.raw_edid = (char *)edid;
  1092.         goto end;
  1093.  
  1094. clean_up:
  1095.         kfree(edid);
  1096.         edid = NULL;
  1097. end:
  1098.         return edid;
  1099.  
  1100. }
  1101. EXPORT_SYMBOL(drm_get_edid);
  1102.  
  1103. #define HDMI_IDENTIFIER 0x000C03
  1104. #define VENDOR_BLOCK    0x03
  1105. /**
  1106.  * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
  1107.  * @edid: monitor EDID information
  1108.  *
  1109.  * Parse the CEA extension according to CEA-861-B.
  1110.  * Return true if HDMI, false if not or unknown.
  1111.  */
  1112. bool drm_detect_hdmi_monitor(struct edid *edid)
  1113. {
  1114.         char *edid_ext = NULL;
  1115.         int i, hdmi_id, edid_ext_num;
  1116.         int start_offset, end_offset;
  1117.         bool is_hdmi = false;
  1118.  
  1119.         /* No EDID or EDID extensions */
  1120.         if (edid == NULL || edid->extensions == 0)
  1121.                 goto end;
  1122.  
  1123.         /* Chose real EDID extension number */
  1124.         edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
  1125.                        MAX_EDID_EXT_NUM : edid->extensions;
  1126.  
  1127.         /* Find CEA extension */
  1128.         for (i = 0; i < edid_ext_num; i++) {
  1129.                 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
  1130.                 /* This block is CEA extension */
  1131.                 if (edid_ext[0] == 0x02)
  1132.                         break;
  1133.         }
  1134.  
  1135.         if (i == edid_ext_num)
  1136.                 goto end;
  1137.  
  1138.         /* Data block offset in CEA extension block */
  1139.         start_offset = 4;
  1140.         end_offset = edid_ext[2];
  1141.  
  1142.         /*
  1143.          * Because HDMI identifier is in Vendor Specific Block,
  1144.          * search it from all data blocks of CEA extension.
  1145.          */
  1146.         for (i = start_offset; i < end_offset;
  1147.                 /* Increased by data block len */
  1148.                 i += ((edid_ext[i] & 0x1f) + 1)) {
  1149.                 /* Find vendor specific block */
  1150.                 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
  1151.                         hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
  1152.                                   edid_ext[i + 3] << 16;
  1153.                         /* Find HDMI identifier */
  1154.                         if (hdmi_id == HDMI_IDENTIFIER)
  1155.                                 is_hdmi = true;
  1156.                         break;
  1157.                 }
  1158.         }
  1159.  
  1160. end:
  1161.         return is_hdmi;
  1162. }
  1163. EXPORT_SYMBOL(drm_detect_hdmi_monitor);
  1164.  
  1165. /**
  1166.  * drm_add_edid_modes - add modes from EDID data, if available
  1167.  * @connector: connector we're probing
  1168.  * @edid: edid data
  1169.  *
  1170.  * Add the specified modes to the connector's mode list.
  1171.  *
  1172.  * Return number of modes added or 0 if we couldn't find any.
  1173.  */
  1174. int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
  1175. {
  1176.         int num_modes = 0;
  1177.         u32 quirks;
  1178.  
  1179.         if (edid == NULL) {
  1180.                 return 0;
  1181.         }
  1182.         if (!edid_is_valid(edid)) {
  1183. //       dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
  1184. //            drm_get_connector_name(connector));
  1185.                 return 0;
  1186.         }
  1187.  
  1188.         quirks = edid_get_quirks(edid);
  1189.  
  1190.         num_modes += add_established_modes(connector, edid);
  1191.         num_modes += add_standard_modes(connector, edid);
  1192.         num_modes += add_detailed_info(connector, edid, quirks);
  1193.         num_modes += add_detailed_info_eedid(connector, edid, quirks);
  1194.  
  1195.         if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
  1196.                 edid_fixup_preferred(connector, quirks);
  1197.  
  1198.         connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
  1199.         connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
  1200.         connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
  1201.         connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
  1202.         connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
  1203.         connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
  1204.         connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
  1205.         connector->display_info.width_mm = edid->width_cm * 10;
  1206.         connector->display_info.height_mm = edid->height_cm * 10;
  1207.         connector->display_info.gamma = edid->gamma;
  1208.         connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
  1209.         connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
  1210.         connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
  1211.         connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
  1212.         connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
  1213.         connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
  1214.         connector->display_info.gamma = edid->gamma;
  1215.  
  1216.         return num_modes;
  1217. }
  1218. EXPORT_SYMBOL(drm_add_edid_modes);
  1219.  
  1220. /**
  1221.  * drm_add_modes_noedid - add modes for the connectors without EDID
  1222.  * @connector: connector we're probing
  1223.  * @hdisplay: the horizontal display limit
  1224.  * @vdisplay: the vertical display limit
  1225.  *
  1226.  * Add the specified modes to the connector's mode list. Only when the
  1227.  * hdisplay/vdisplay is not beyond the given limit, it will be added.
  1228.  *
  1229.  * Return number of modes added or 0 if we couldn't find any.
  1230.  */
  1231. int drm_add_modes_noedid(struct drm_connector *connector,
  1232.                         int hdisplay, int vdisplay)
  1233. {
  1234.         int i, count, num_modes = 0;
  1235.         struct drm_display_mode *mode, *ptr;
  1236.         struct drm_device *dev = connector->dev;
  1237.  
  1238.         count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
  1239.         if (hdisplay < 0)
  1240.                 hdisplay = 0;
  1241.         if (vdisplay < 0)
  1242.                 vdisplay = 0;
  1243.  
  1244.         for (i = 0; i < count; i++) {
  1245.                 ptr = &drm_dmt_modes[i];
  1246.                 if (hdisplay && vdisplay) {
  1247.                         /*
  1248.                          * Only when two are valid, they will be used to check
  1249.                          * whether the mode should be added to the mode list of
  1250.                          * the connector.
  1251.                          */
  1252.                         if (ptr->hdisplay > hdisplay ||
  1253.                                         ptr->vdisplay > vdisplay)
  1254.                                 continue;
  1255.                 }
  1256.                 mode = drm_mode_duplicate(dev, ptr);
  1257.                 if (mode) {
  1258.                         drm_mode_probed_add(connector, mode);
  1259.                         num_modes++;
  1260.                 }
  1261.         }
  1262.         return num_modes;
  1263. }
  1264. EXPORT_SYMBOL(drm_add_modes_noedid);
  1265.