| /* |
| * Copyright (c) 2012 The Chromium OS Authors. |
| * |
| * (C) Copyright 2010 |
| * Petr Stetiar <ynezz@true.cz> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * Contains stolen code from ddcprobe project which is: |
| * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com> |
| */ |
| |
| #include <common.h> |
| #include <edid.h> |
| #include <linux/ctype.h> |
| #include <linux/string.h> |
| |
| int edid_check_info(struct edid1_info *edid_info) |
| { |
| if ((edid_info == NULL) || (edid_info->version == 0)) |
| return -1; |
| |
| if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8)) |
| return -1; |
| |
| if (edid_info->version == 0xff && edid_info->revision == 0xff) |
| return -1; |
| |
| return 0; |
| } |
| |
| int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin, |
| unsigned int *hmax, unsigned int *vmin, |
| unsigned int *vmax) |
| { |
| int i; |
| struct edid_monitor_descriptor *monitor; |
| |
| *hmin = *hmax = *vmin = *vmax = 0; |
| if (edid_check_info(edid)) |
| return -1; |
| |
| for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) { |
| monitor = &edid->monitor_details.descriptor[i]; |
| if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) { |
| *hmin = monitor->data.range_data.horizontal_min; |
| *hmax = monitor->data.range_data.horizontal_max; |
| *vmin = monitor->data.range_data.vertical_min; |
| *vmax = monitor->data.range_data.vertical_max; |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| /** |
| * Snip the tailing whitespace/return of a string. |
| * |
| * @param string The string to be snipped |
| * @return the snipped string |
| */ |
| static char *snip(char *string) |
| { |
| char *s; |
| |
| /* |
| * This is always a 13 character buffer |
| * and it's not always terminated. |
| */ |
| string[12] = '\0'; |
| s = &string[strlen(string) - 1]; |
| |
| while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' || |
| *s == '\0')) |
| *(s--) = '\0'; |
| |
| return string; |
| } |
| |
| /** |
| * Print an EDID monitor descriptor block |
| * |
| * @param monitor The EDID monitor descriptor block |
| * @have_timing Modifies to 1 if the desciptor contains timing info |
| */ |
| static void edid_print_dtd(struct edid_monitor_descriptor *monitor, |
| unsigned int *have_timing) |
| { |
| unsigned char *bytes = (unsigned char *)monitor; |
| struct edid_detailed_timing *timing = |
| (struct edid_detailed_timing *)monitor; |
| |
| if (bytes[0] == 0 && bytes[1] == 0) { |
| if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL) |
| printf("Monitor serial number: %s\n", |
| snip(monitor->data.string)); |
| else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII) |
| printf("Monitor ID: %s\n", |
| snip(monitor->data.string)); |
| else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME) |
| printf("Monitor name: %s\n", |
| snip(monitor->data.string)); |
| else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) |
| printf("Monitor range limits, horizontal sync: " |
| "%d-%d kHz, vertical refresh: " |
| "%d-%d Hz, max pixel clock: " |
| "%d MHz\n", |
| monitor->data.range_data.horizontal_min, |
| monitor->data.range_data.horizontal_max, |
| monitor->data.range_data.vertical_min, |
| monitor->data.range_data.vertical_max, |
| monitor->data.range_data.pixel_clock_max * 10); |
| } else { |
| uint32_t pixclock, h_active, h_blanking, v_active, v_blanking; |
| uint32_t h_total, v_total, vfreq; |
| |
| pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing); |
| h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing); |
| h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing); |
| v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing); |
| v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing); |
| |
| h_total = h_active + h_blanking; |
| v_total = v_active + v_blanking; |
| if (v_total * h_total) |
| vfreq = pixclock / (v_total * h_total); |
| else |
| vfreq = 1; /* Error case */ |
| printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active, |
| v_active, h_active > 1000 ? ' ' : '\t', vfreq); |
| *have_timing = 1; |
| } |
| } |
| |
| /** |
| * Get the manufacturer name from an EDID info. |
| * |
| * @param edid_info The EDID info to be printed |
| * @param name Returns the string of the manufacturer name |
| */ |
| static void edid_get_manufacturer_name(struct edid1_info *edid, char *name) |
| { |
| name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1; |
| name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1; |
| name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1; |
| name[3] = '\0'; |
| } |
| |
| void edid_print_info(struct edid1_info *edid_info) |
| { |
| int i; |
| char manufacturer[4]; |
| unsigned int have_timing = 0; |
| uint32_t serial_number; |
| |
| if (edid_check_info(edid_info)) { |
| printf("Not a valid EDID\n"); |
| return; |
| } |
| |
| printf("EDID version: %d.%d\n", |
| edid_info->version, edid_info->revision); |
| |
| printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info)); |
| |
| edid_get_manufacturer_name(edid_info, manufacturer); |
| printf("Manufacturer: %s\n", manufacturer); |
| |
| serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info); |
| if (serial_number != 0xffffffff) { |
| if (strcmp(manufacturer, "MAG") == 0) |
| serial_number -= 0x7000000; |
| if (strcmp(manufacturer, "OQI") == 0) |
| serial_number -= 456150000; |
| if (strcmp(manufacturer, "VSC") == 0) |
| serial_number -= 640000000; |
| } |
| printf("Serial number: %08x\n", serial_number); |
| printf("Manufactured in week: %d year: %d\n", |
| edid_info->week, edid_info->year + 1990); |
| |
| printf("Video input definition: %svoltage level %d%s%s%s%s%s\n", |
| EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ? |
| "digital signal, " : "analog signal, ", |
| EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info), |
| EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ? |
| ", blank to black" : "", |
| EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ? |
| ", separate sync" : "", |
| EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ? |
| ", composite sync" : "", |
| EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ? |
| ", sync on green" : "", |
| EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ? |
| ", serration v" : ""); |
| |
| printf("Monitor is %s\n", |
| EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB"); |
| |
| printf("Maximum visible display size: %d cm x %d cm\n", |
| edid_info->max_size_horizontal, |
| edid_info->max_size_vertical); |
| |
| printf("Power management features: %s%s, %s%s, %s%s\n", |
| EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ? |
| "" : "no ", "active off", |
| EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend", |
| EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby"); |
| |
| printf("Estabilished timings:\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info)) |
| printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info)) |
| printf("\t720x400\t\t88 Hz (XGA2)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info)) |
| printf("\t640x480\t\t60 Hz (VGA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info)) |
| printf("\t640x480\t\t67 Hz (Mac II, Apple)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info)) |
| printf("\t640x480\t\t72 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info)) |
| printf("\t640x480\t\t75 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info)) |
| printf("\t800x600\t\t56 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info)) |
| printf("\t800x600\t\t60 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info)) |
| printf("\t800x600\t\t72 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info)) |
| printf("\t800x600\t\t75 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info)) |
| printf("\t832x624\t\t75 Hz (Mac II)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info)) |
| printf("\t1024x768\t87 Hz Interlaced (8514A)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info)) |
| printf("\t1024x768\t60 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info)) |
| printf("\t1024x768\t70 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info)) |
| printf("\t1024x768\t75 Hz (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info)) |
| printf("\t1280x1024\t75 (VESA)\n"); |
| if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info)) |
| printf("\t1152x870\t75 (Mac II)\n"); |
| |
| /* Standard timings. */ |
| printf("Standard timings:\n"); |
| for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) { |
| unsigned int aspect = 10000; |
| unsigned int x, y; |
| unsigned char xres, vfreq; |
| |
| xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i); |
| vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i); |
| if ((xres != vfreq) || |
| ((xres != 0) && (xres != 1)) || |
| ((vfreq != 0) && (vfreq != 1))) { |
| switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info, |
| i)) { |
| case ASPECT_625: |
| aspect = 6250; |
| break; |
| case ASPECT_75: |
| aspect = 7500; |
| break; |
| case ASPECT_8: |
| aspect = 8000; |
| break; |
| case ASPECT_5625: |
| aspect = 5625; |
| break; |
| } |
| x = (xres + 31) * 8; |
| y = x * aspect / 10000; |
| printf("\t%dx%d%c\t%d Hz\n", x, y, |
| x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60); |
| have_timing = 1; |
| } |
| } |
| |
| /* Detailed timing information. */ |
| for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor); |
| i++) { |
| edid_print_dtd(&edid_info->monitor_details.descriptor[i], |
| &have_timing); |
| } |
| |
| if (!have_timing) |
| printf("\tNone\n"); |
| } |