1 /* 2 * Copyright (c) 2012 The Chromium OS Authors. 3 * 4 * (C) Copyright 2010 5 * Petr Stetiar <ynezz@true.cz> 6 * 7 * See file CREDITS for list of people who contributed to this 8 * project. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of 13 * the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 23 * MA 02111-1307 USA 24 * 25 * Contains stolen code from ddcprobe project which is: 26 * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com> 27 * 28 */ 29 30 #include <common.h> 31 #include <edid.h> 32 #include <linux/ctype.h> 33 #include <linux/string.h> 34 35 int edid_check_info(struct edid1_info *edid_info) 36 { 37 if ((edid_info == NULL) || (edid_info->version == 0)) 38 return -1; 39 40 if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8)) 41 return -1; 42 43 if (edid_info->version == 0xff && edid_info->revision == 0xff) 44 return -1; 45 46 return 0; 47 } 48 49 int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin, 50 unsigned int *hmax, unsigned int *vmin, 51 unsigned int *vmax) 52 { 53 int i; 54 struct edid_monitor_descriptor *monitor; 55 56 *hmin = *hmax = *vmin = *vmax = 0; 57 if (edid_check_info(edid)) 58 return -1; 59 60 for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) { 61 monitor = &edid->monitor_details.descriptor[i]; 62 if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) { 63 *hmin = monitor->data.range_data.horizontal_min; 64 *hmax = monitor->data.range_data.horizontal_max; 65 *vmin = monitor->data.range_data.vertical_min; 66 *vmax = monitor->data.range_data.vertical_max; 67 return 0; 68 } 69 } 70 return -1; 71 } 72 73 /** 74 * Snip the tailing whitespace/return of a string. 75 * 76 * @param string The string to be snipped 77 * @return the snipped string 78 */ 79 static char *snip(char *string) 80 { 81 char *s; 82 83 /* 84 * This is always a 13 character buffer 85 * and it's not always terminated. 86 */ 87 string[12] = '\0'; 88 s = &string[strlen(string) - 1]; 89 90 while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' || 91 *s == '\0')) 92 *(s--) = '\0'; 93 94 return string; 95 } 96 97 /** 98 * Print an EDID monitor descriptor block 99 * 100 * @param monitor The EDID monitor descriptor block 101 * @have_timing Modifies to 1 if the desciptor contains timing info 102 */ 103 static void edid_print_dtd(struct edid_monitor_descriptor *monitor, 104 unsigned int *have_timing) 105 { 106 unsigned char *bytes = (unsigned char *)monitor; 107 struct edid_detailed_timing *timing = 108 (struct edid_detailed_timing *)monitor; 109 110 if (bytes[0] == 0 && bytes[1] == 0) { 111 if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL) 112 printf("Monitor serial number: %s\n", 113 snip(monitor->data.string)); 114 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII) 115 printf("Monitor ID: %s\n", 116 snip(monitor->data.string)); 117 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME) 118 printf("Monitor name: %s\n", 119 snip(monitor->data.string)); 120 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) 121 printf("Monitor range limits, horizontal sync: " 122 "%d-%d kHz, vertical refresh: " 123 "%d-%d Hz, max pixel clock: " 124 "%d MHz\n", 125 monitor->data.range_data.horizontal_min, 126 monitor->data.range_data.horizontal_max, 127 monitor->data.range_data.vertical_min, 128 monitor->data.range_data.vertical_max, 129 monitor->data.range_data.pixel_clock_max * 10); 130 } else { 131 uint32_t pixclock, h_active, h_blanking, v_active, v_blanking; 132 uint32_t h_total, v_total, vfreq; 133 134 pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing); 135 h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing); 136 h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing); 137 v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing); 138 v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing); 139 140 h_total = h_active + h_blanking; 141 v_total = v_active + v_blanking; 142 if (v_total * h_total) 143 vfreq = pixclock / (v_total * h_total); 144 else 145 vfreq = 1; /* Error case */ 146 printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active, 147 v_active, h_active > 1000 ? ' ' : '\t', vfreq); 148 *have_timing = 1; 149 } 150 } 151 152 /** 153 * Get the manufacturer name from an EDID info. 154 * 155 * @param edid_info The EDID info to be printed 156 * @param name Returns the string of the manufacturer name 157 */ 158 static void edid_get_manufacturer_name(struct edid1_info *edid, char *name) 159 { 160 name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1; 161 name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1; 162 name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1; 163 name[3] = '\0'; 164 } 165 166 void edid_print_info(struct edid1_info *edid_info) 167 { 168 int i; 169 char manufacturer[4]; 170 unsigned int have_timing = 0; 171 uint32_t serial_number; 172 173 if (edid_check_info(edid_info)) { 174 printf("Not a valid EDID\n"); 175 return; 176 } 177 178 printf("EDID version: %d.%d\n", 179 edid_info->version, edid_info->revision); 180 181 printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info)); 182 183 edid_get_manufacturer_name(edid_info, manufacturer); 184 printf("Manufacturer: %s\n", manufacturer); 185 186 serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info); 187 if (serial_number != 0xffffffff) { 188 if (strcmp(manufacturer, "MAG") == 0) 189 serial_number -= 0x7000000; 190 if (strcmp(manufacturer, "OQI") == 0) 191 serial_number -= 456150000; 192 if (strcmp(manufacturer, "VSC") == 0) 193 serial_number -= 640000000; 194 } 195 printf("Serial number: %08x\n", serial_number); 196 printf("Manufactured in week: %d year: %d\n", 197 edid_info->week, edid_info->year + 1990); 198 199 printf("Video input definition: %svoltage level %d%s%s%s%s%s\n", 200 EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ? 201 "digital signal, " : "analog signal, ", 202 EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info), 203 EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ? 204 ", blank to black" : "", 205 EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ? 206 ", separate sync" : "", 207 EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ? 208 ", composite sync" : "", 209 EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ? 210 ", sync on green" : "", 211 EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ? 212 ", serration v" : ""); 213 214 printf("Monitor is %s\n", 215 EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB"); 216 217 printf("Maximum visible display size: %d cm x %d cm\n", 218 edid_info->max_size_horizontal, 219 edid_info->max_size_vertical); 220 221 printf("Power management features: %s%s, %s%s, %s%s\n", 222 EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ? 223 "" : "no ", "active off", 224 EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend", 225 EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby"); 226 227 printf("Estabilished timings:\n"); 228 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info)) 229 printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n"); 230 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info)) 231 printf("\t720x400\t\t88 Hz (XGA2)\n"); 232 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info)) 233 printf("\t640x480\t\t60 Hz (VGA)\n"); 234 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info)) 235 printf("\t640x480\t\t67 Hz (Mac II, Apple)\n"); 236 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info)) 237 printf("\t640x480\t\t72 Hz (VESA)\n"); 238 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info)) 239 printf("\t640x480\t\t75 Hz (VESA)\n"); 240 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info)) 241 printf("\t800x600\t\t56 Hz (VESA)\n"); 242 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info)) 243 printf("\t800x600\t\t60 Hz (VESA)\n"); 244 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info)) 245 printf("\t800x600\t\t72 Hz (VESA)\n"); 246 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info)) 247 printf("\t800x600\t\t75 Hz (VESA)\n"); 248 if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info)) 249 printf("\t832x624\t\t75 Hz (Mac II)\n"); 250 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info)) 251 printf("\t1024x768\t87 Hz Interlaced (8514A)\n"); 252 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info)) 253 printf("\t1024x768\t60 Hz (VESA)\n"); 254 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info)) 255 printf("\t1024x768\t70 Hz (VESA)\n"); 256 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info)) 257 printf("\t1024x768\t75 Hz (VESA)\n"); 258 if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info)) 259 printf("\t1280x1024\t75 (VESA)\n"); 260 if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info)) 261 printf("\t1152x870\t75 (Mac II)\n"); 262 263 /* Standard timings. */ 264 printf("Standard timings:\n"); 265 for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) { 266 unsigned int aspect = 10000; 267 unsigned int x, y; 268 unsigned char xres, vfreq; 269 270 xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i); 271 vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i); 272 if ((xres != vfreq) || 273 ((xres != 0) && (xres != 1)) || 274 ((vfreq != 0) && (vfreq != 1))) { 275 switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info, 276 i)) { 277 case ASPECT_625: 278 aspect = 6250; 279 break; 280 case ASPECT_75: 281 aspect = 7500; 282 break; 283 case ASPECT_8: 284 aspect = 8000; 285 break; 286 case ASPECT_5625: 287 aspect = 5625; 288 break; 289 } 290 x = (xres + 31) * 8; 291 y = x * aspect / 10000; 292 printf("\t%dx%d%c\t%d Hz\n", x, y, 293 x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60); 294 have_timing = 1; 295 } 296 } 297 298 /* Detailed timing information. */ 299 for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor); 300 i++) { 301 edid_print_dtd(&edid_info->monitor_details.descriptor[i], 302 &have_timing); 303 } 304 305 if (!have_timing) 306 printf("\tNone\n"); 307 } 308