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Add a standalone program for parsing VBT.

This commit is contained in:
Eric Anholt 2006-04-16 13:05:35 -05:00
parent 62652127cd
commit 786ee3df17
5 changed files with 170 additions and 1 deletions
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1
configure.ac
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@ -116,5 +116,6 @@ AC_OUTPUT([
Makefile
src/Makefile
src/xvmc/Makefile
src/bios_reader/Makefile
man/Makefile
])

2
src/Makefile.am
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@ -18,7 +18,7 @@
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
SUBDIRS = xvmc
SUBDIRS = xvmc bios_reader
# this is obnoxious:
# -module lets us name the module exactly how we want
# -avoid-version prevents gratuitous .0.0.0 version numbers on the end

1
src/bios_reader/.gitignore vendored Normal file
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@ -0,0 +1 @@
bios_reader

4
src/bios_reader/Makefile.am Normal file
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@ -0,0 +1,4 @@
AM_CFLAGS = @XORG_CFLAGS@
noinst_PROGRAMS = bios_reader

163
src/bios_reader/bios_reader.c Normal file
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@ -0,0 +1,163 @@
/*
* Copyright © 2006 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#define _PARSE_EDID_
#include "edid.h"
/* Define some types so we can reuse i830_bios.h */
typedef void *ScrnInfoPtr;
typedef int Bool;
#define TRUE 1
#define FALSE 0
#include "../i830_bios.h"
/* Make a fake pI830 so we can easily pull i830_bios.c code in here. */
struct _fake_i830 {
CARD8 *VBIOS;
};
struct _fake_i830 I830;
struct _fake_i830 *pI830 = &I830;
#define INTEL_BIOS_8(_addr) (pI830->VBIOS[_addr])
#define INTEL_BIOS_16(_addr) (pI830->VBIOS[_addr] | \
(pI830->VBIOS[_addr + 1] << 8))
#define INTEL_BIOS_32(_addr) (pI830->VBIOS[_addr] | \
(pI830->VBIOS[_addr + 1] << 8) \
(pI830->VBIOS[_addr + 2] << 16) \
(pI830->VBIOS[_addr + 3] << 24))
int main(int argc, char **argv)
{
FILE *f;
int bios_size = 65536;
struct vbt_header *vbt;
struct bdb_header *bdb;
int vbt_off, bdb_off, bdb_block_off, block_size;
int panel_type = -1, i;
char *filename = "bios";
if (argc == 2)
filename = argv[1];
f = fopen(filename, "r");
if (!f) {
printf("Couldn't open %s\n", filename);
return 1;
}
pI830->VBIOS = calloc(1, bios_size);
if (fread(pI830->VBIOS, 1, bios_size, f) != bios_size)
return 1;
vbt_off = INTEL_BIOS_16(0x1a);
printf("VBT offset: %08x\n", vbt_off);
vbt = (struct vbt_header *)(pI830->VBIOS + vbt_off);
printf("VBT sig: %20s\n", vbt->signature);
printf("VBT vers: %d.%d\n", vbt->version / 100, vbt->version % 100);
bdb_off = vbt_off + vbt->bdb_offset;
bdb = (struct bdb_header *)(pI830->VBIOS + bdb_off);
printf("BDB sig: %16s\n", bdb->signature);
printf("BDB vers: %d.%d\n", bdb->version / 100, bdb->version % 100);
for (bdb_block_off = bdb->header_size; bdb_block_off < bdb->bdb_size;
bdb_block_off += block_size)
{
int start = bdb_off + bdb_block_off;
int id;
struct lvds_bdb_1 *lvds1;
struct lvds_bdb_2 *lvds2;
struct lvds_bdb_2_fp_params *fpparam;
struct lvds_bdb_2_fp_edid_dtd *fptiming;
CARD8 *timing_ptr;
id = INTEL_BIOS_8(start);
block_size = INTEL_BIOS_16(start + 1) + 3;
printf("BDB block type %03d size %d\n", id, block_size);
switch (id) {
case 40:
lvds1 = (struct lvds_bdb_1 *)(pI830->VBIOS + start);
panel_type = lvds1->panel_type;
printf("Panel type: %d, caps %04x\n", panel_type, lvds1->caps);
break;
case 41:
if (panel_type == -1) {
printf("Found panel block with no panel type\n");
break;
}
lvds2 = (struct lvds_bdb_2 *)(pI830->VBIOS + start);
printf("Entries per table: %d\n", lvds2->table_size);
for (i = 0; i < 16; i++) {
char marker;
fpparam = (struct lvds_bdb_2_fp_params *)(pI830->VBIOS +
bdb_off + lvds2->panels[i].fp_params_offset);
fptiming = (struct lvds_bdb_2_fp_edid_dtd *)(pI830->VBIOS +
bdb_off + lvds2->panels[i].fp_edid_dtd_offset);
timing_ptr = pI830->VBIOS + bdb_off +
lvds2->panels[i].fp_edid_dtd_offset;
if (fpparam->terminator != 0xffff) {
/* Apparently the offsets are wrong for some BIOSes, so we
* try the other offsets if we find a bad terminator.
*/
fpparam = (struct lvds_bdb_2_fp_params *)(pI830->VBIOS +
bdb_off + lvds2->panels[i].fp_params_offset + 8);
fptiming = (struct lvds_bdb_2_fp_edid_dtd *)(pI830->VBIOS +
bdb_off + lvds2->panels[i].fp_edid_dtd_offset + 8);
timing_ptr = pI830->VBIOS + bdb_off +
lvds2->panels[i].fp_edid_dtd_offset + 8;
if (fpparam->terminator != 0xffff)
continue;
}
if (i == panel_type)
marker = '*';
else
marker = ' ';
printf("%c Panel index %02i xres %d yres %d clock %d\n", marker,
i, fpparam->x_res, fpparam->y_res,
_PIXEL_CLOCK(timing_ptr));
printf(" %d %d %d %d %d %d %d %d\n",
_H_ACTIVE(timing_ptr), _H_BLANK(timing_ptr),
_H_SYNC_OFF(timing_ptr), _H_SYNC_WIDTH(timing_ptr),
_V_ACTIVE(timing_ptr), _V_BLANK(timing_ptr),
_V_SYNC_OFF(timing_ptr), _V_SYNC_WIDTH(timing_ptr));
}
printf("Panel of size %dx%d\n", fpparam->x_res, fpparam->y_res);
break;
}
}
return 0;
}