+++ /dev/null
-/*
- * Parse VESA Extended Display Identification Data
- *
- * (c) 2011 Martin Mares <mj@ucw.cz>
- *
- * This program can be distributed and used under the terms
- * of the GNU General Public License version 2 or later.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <unistd.h>
-
-typedef unsigned int uns;
-typedef unsigned char byte;
-
-static byte edid[128];
-static int version;
-
-static void
-#ifdef __GNUC__
- __attribute__((format(printf,1,2)))
- __attribute__((noreturn))
-#endif
-die(char *msg, ...)
-{
- va_list args;
- va_start(args, msg);
- fprintf(stderr, "edid: ");
- vfprintf(stderr, msg, args);
- fputc('\n', stderr);
- va_end(args);
- exit(1);
-}
-
-static uns
-u16_le(byte *p)
-{
- return p[0] | (p[1] << 8);
-}
-
-static uns
-u32_le(byte *p)
-{
- return u16_le(p) | (u16_le(p+2) << 16);
-}
-
-static uns
-B(uns x)
-{
- return x ? '+' : '-';
-}
-
-static void
-show_model(byte *p)
-{
- printf("Model: %c%c%c %04x #%u\n",
- ('A' - 1 + ((p[0] >> 2) & 0x1f)),
- ('A' - 1 + ((p[0] & 3) << 3) | ((p[1] & 0xe0) >> 5)),
- ('A' - 1 + (p[1] & 0x1f)),
- u16_le(p+2),
- u32_le(p+4));
- printf("Manufactured: %d week %d\n", p[9] + 1990, p[8]);
-}
-
-static void
-show_basic(byte *p)
-{
- uns input = p[0];
- if (input & 0x80)
- printf("Input: Digital DFP%c\n", B(input & 1));
- else
- printf("Input: Analog SigLev=%d Setup%c SepSync%c CompSync%c GreenSync%c SerrSync%c\n",
- ((input >> 5) & 3),
- B(input & 0x10),
- B(input & 0x08),
- B(input & 0x04),
- B(input & 0x02),
- B(input & 0x01));
-
- printf("Image size: %dx%dcm\n", p[1], p[2]);
- if (p[3] == 0xff)
- printf("Gamma: not given\n");
- else
- printf("Gamma: %d.%02d\n", (p[3] / 100) + 1, p[3] % 100);
-
- uns flags = p[4];
- static const char * const types[4] = { "Mono/Gray", "RGB", "NonRGB", "Unknown" };
- printf("Flags: Suspend%c Standby%c ActiveOff%c Colors=%s HasSRGB%c PrefTiming%c GTF%c\n",
- B(flags & 0x80),
- B(flags & 0x40),
- B(flags & 0x20),
- types[(flags >> 3) & 3],
- B(flags & 0x04),
- B(flags & 0x02),
- B(flags & 0x01));
-}
-
-static void
-show_color(byte *p)
-{
- uns rx = 4*p[2] | ((p[0] >> 6) & 3);
- uns ry = 4*p[3] | ((p[0] >> 4) & 3);
- uns gx = 4*p[4] | ((p[0] >> 2) & 3);
- uns gy = 4*p[5] | ((p[0] ) & 3);
- uns bx = 4*p[5] | ((p[1] >> 6) & 3);
- uns by = 4*p[7] | ((p[1] >> 4) & 3);
- uns wx = 4*p[8] | ((p[1] >> 2) & 3);
- uns wy = 4*p[9] | ((p[1] ) & 3);
-#define C(c) ((double)c / 1024)
- printf("Chromaticity: R=(%.3f,%.3f) G=(%.3f,%.3f) B=(%.3f,%.3f) W=(%.3f,%.3f)\n",
- C(rx), C(ry), C(gx), C(gy), C(bx), C(by), C(wx), C(wy));
-#undef C
-}
-
-static void
-show_timings(byte *p)
-{
- static const char * const estab_timings[24] = {
- "720x400@70",
- "720x400@88",
- "640x480@60",
- "640x480@67",
- "640x480@72",
- "640x480@75",
- "800x600@56",
- "800x600@60",
- "800x600@72",
- "800x600@75",
- "832x624@75",
- "1024x768@87i",
- "1024x768@60",
- "1024x768@70",
- "1024x768@75",
- "1280x1024@75",
- "MFG7",
- "MFG6",
- "MFG5",
- "MFG4",
- "MFG3",
- "MFG2",
- "MFG1",
- "MFG0",
- };
- printf("Basic timings:");
- for (int i=0; i<24; i++)
- if (p[i/8] & (0x80 >> (i%8)))
- printf(" %s", estab_timings[i]);
- printf("\n");
-
- printf("Extended timings:");
- for (int i=0; i<8; i++)
- {
- byte *q = p + 3 + 2*i;
- if (q[0] == 1 && q[1] == 1)
- continue;
- uns h = (31 + q[0]) * 8;
- uns v;
- switch (q[1] >> 6)
- {
- case 0:
- if (version < 0x0103)
- v = h;
- else
- v = 10*h/16;
- break;
- case 1:
- v = 3*h/4;
- break;
- case 2:
- v = 4*h/5;
- break;
- default:
- v = 9*h/16;
- break;
- }
- printf(" %dx%d@%d", h, v, 60 + (q[1] & 0x3f));
- }
- printf("\n");
-}
-
-static void
-show_detailed_timing(byte *p)
-{
- uns hactive = p[2] | ((p[4] << 4) & 0xf00);
- uns hblank = p[3] | ((p[4] << 8) & 0xf00);
- uns vactive = p[5] | ((p[7] << 4) & 0xf00);
- uns vblank = p[6] | ((p[7] << 8) & 0xf00);
- uns hs_offset = p[8] | ((p[11] << 2) & 0x300);
- uns hs_width = p[9] | ((p[11] << 4) & 0x300);
- uns vs_offset = (p[10] >> 4) | ((p[11] << 2) & 0x30);
- uns vs_width = (p[10] & 0xf) | ((p[11] << 4) & 0x30);
- uns hsize = p[12] | ((p[14] << 4) & 0xf00);
- uns vsize = p[13] | ((p[14] << 8) & 0xf00);
- uns hborder = p[15];
- uns vborder = p[16];
-
- printf("Detailed timing: %dx%d (%.1f Hz)\n",
- hactive, vactive,
- u16_le(p) * 10000. / (hactive+hblank) / (vactive+vblank));
- printf("\tPixClk: %.2fMHz\n", u16_le(p) / 100.);
- printf("\tH: Active=%d Blank=%d SyncOffset=%d SyncWidth=%d Border=%d\n",
- hactive, hblank, hs_offset, hs_width, hborder);
- printf("\tV: Active=%d Blank=%d SyncOffset=%d SyncWidth=%d Border=%d\n",
- vactive, vblank, vs_offset, vs_width, vborder);
- printf("\tSize: %dx%dmm\n", hsize, vsize);
-
- uns flags = p[17];
- uns stereo = ((flags >> 4) & 6) | (flags & 1);
- uns input = (flags >> 3) & 3;
- if (stereo >= 2)
- printf("\tStereo mode: #%d\n", stereo);
-
- static const char * const input_types[4] = { "AnalogComposite", "BipolarAnalogComposite", "DigitalComposite", "DigitalSeparate" };
- printf("\tInput: %s", input_types[input]);
- if (input < 3)
- printf(" Serrate%c", B(flags & 4));
- else
- printf(" VPolarity%c", B(flags & 4));
- if (input < 2)
- printf(" OnRGB%c", B(flags & 2));
- else if (input == 2)
- printf(" CompPolarity%c", B(flags & 2));
- else
- printf(" HPolarity%c", B(flags & 2));
- printf("\n");
-
- if (hsize && vsize)
- printf("\tCalculated DPI: %dx%d\n",
- (int)(hactive / (hsize / 25.4)),
- (int)(vactive / (vsize / 25.4)));
-}
-
-static void
-show_ascii(char *field, byte *p, uns len)
-{
- printf("%s: ", field);
- while (len--)
- {
- if (*p == '\n')
- break;
- else if (*p >= 0x20 && *p <= 0x7e)
- putchar(*p);
- else
- printf("<%02x>", *p);
- p++;
- }
- putchar('\n');
-}
-
-static void
-show_descriptor(byte *p)
-{
- switch (p[3])
- {
- case 0xff: // Serial number
- show_ascii("Serial", p+5, 13);
- break;
- case 0xfe: // ASCII data
- show_ascii("Comment", p+5, 13);
- break;
- case 0xfd: // Range limits
- printf("Limits: Vert=%d-%dHz Horiz=%d-%dkHz PixClk=%dMHz\n",
- p[5], p[6], p[7], p[8], p[9]*10);
- switch (p[10])
- {
- case 0: // No secondary timing formula
- break;
- case 2: // Secondary GTF
- printf("Secondary GTF parameters: fStart=%dkHz C=%.1f M=%d K=%d J=%.1f\n",
- p[12]*2, p[13]/2., u16_le(p+14), p[16], p[17]/2.);
- break;
- default:
- printf("Unidentified secondary timing formula #%02x\n", p[10]);
- }
- break;
- case 0xfc: // Monitor name
- show_ascii("Monitor name", p+5, 13);
- break;
- case 0xfb: // Color point
- printf("Color point: [...]\n");
- break;
- case 0xfa: // More standard timings
- printf("More standard timings: [...]\n");
- break;
- case 0x10: // Dummy descriptor -- entry unused
- return;
- default:
- printf("Unknown descriptor type %02x\n", p[3]);
- }
-}
-
-static void
-show_edid(void)
-{
- if (memcmp(edid, "\000\377\377\377\377\377\377\000", 8))
- die("Invalid EDID signature, giving up");
- int ver = edid[0x12];
- int rev = edid[0x13];
- printf("EDID %d.%d\n", ver, rev);
- version = (ver << 8) | rev;
-
- byte sum = 0;
- for (int i=0; i<128; i++)
- sum += edid[i];
- if (sum)
- printf("Invalid checksum: off by %02x\n", sum);
-
- show_model(edid + 8);
- show_basic(edid + 0x14);
- show_color(edid + 0x19);
- show_timings(edid + 0x23);
- for (int i=0; i<4; i++)
- {
- byte *p = edid + 0x36 + 18*i;
- if (p[0] || p[1])
- show_detailed_timing(p);
- else
- show_descriptor(p);
- }
-
- if (edid[0x7e])
- printf("### %d extension blocks follow, but they are not supported yet ###\n", edid[0x7e]);
-}
-
-static void read_binary(void)
-{
- int c = read(0, edid, 128);
- if (c < 0)
- die("Read error: %m");
- else if (c < 128)
- die("Read only %d bytes, need 128", c);
-}
-
-static void
-read_xorg_log(void)
-{
- char line[1024];
- int mode = 0;
- int cnt = 0;
-
- while (fgets(line, sizeof(line), stdin))
- {
- if (!mode)
- {
- if (strstr(line, "EDID (in hex):"))
- mode = 1;
- }
- else
- {
- char *c = strchr(line, '\n');
- if (!c)
- goto parseerr;
- cnt += 16;
- for (int i=0; i<32; i++)
- {
- if (c == line)
- goto parseerr;
- int x = *--c;
- if (x >= '0' && x <= '9')
- x -= '0';
- else if (x >= 'A' && x <= 'F')
- x -= 'A' - 10;
- else if (x >= 'a' && x <= 'f')
- x -= 'a' - 10;
- else
- goto parseerr;
- if (!(i % 2))
- edid[cnt-1-i/2] = x;
- else
- edid[cnt-1-i/2] |= x << 4;
- }
- if (c > line && c[-1] != ' ' && c[-1] != '\t')
- goto parseerr;
- if (cnt == 128)
- return;
- }
- }
- if (!cnt)
- die("No EDID log found");
- else
- die("EDID log found, but it is too short (only %d bytes)", cnt);
-
-parseerr:
- die("EDID log parse error at: %s", line);
-}
-
-static void
-show_hex(void)
-{
- printf("\n");
- for (int i=0; i<128; i+=16)
- {
- printf("@%02x:", i);
- for (int j=0; j<16; j++)
- printf(" %02x", edid[i+j]);
- printf("\n");
- }
-}
-
-static void
-usage(void)
-{
- fprintf(stderr, "Usage: edid <options>\n\n\
-Options:\n\
--l\t\tParse input as Xorg log file and try to find EDID dump there\n\
--x\t\tShow hexdump of the whole EDID block\n\
-");
- exit(1);
-}
-
-int main(int argc, char **argv)
-{
- int opt;
- int hex_mode = 0;
- int log_mode = 0;
-
- while ((opt = getopt(argc, argv, "xl")) >= 0)
- switch (opt)
- {
- case 'l':
- log_mode = 1;
- break;
- case 'x':
- hex_mode = 1;
- break;
- default:
- usage();
- }
- if (optind < argc)
- usage();
-
- if (log_mode)
- read_xorg_log();
- else
- read_binary();
-
- show_edid();
-
- if (hex_mode)
- show_hex();
- return 0;
-}
projects / misc.git / commitdiff