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* This file is part of the coreboot project.
* Copyright 2013 Google Inc.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef EDID_H
#define EDID_H
/* structure for communicating EDID information from a raw EDID block to
* higher level functions.
* The size of the data types is not critical, so we leave them as
* unsigned int. We can move more into into this struct as needed.
struct edid {
char manuf_name[4];
unsigned int model;
unsigned int serial;
unsigned int year;
unsigned int week;
unsigned int version[2];
unsigned int nonconformant;
unsigned int type;
/* These next three things used to all be called bpp.
* Merriment ensued. The identifier
* 'bpp' is herewith banished from our
* Kingdom.
/* How many bits in the framebuffer per pixel.
* Under all reasonable circumstances, it's 32.
unsigned int framebuffer_bits_per_pixel;
/* On the panel, how many bits per color?
* In almost all cases, it's 6 or 8.
* The standard allows for much more!
unsigned int panel_bits_per_color;
/* On the panel, how many bits per pixel.
* On Planet Earth, there are three colors
* per pixel, but this is convenient to have here
* instead of having 3*panel_bits_per_color
* all over the place.
unsigned int panel_bits_per_pixel;
unsigned int xres;
unsigned int yres;
unsigned int voltage;
unsigned int sync;
unsigned int xsize_cm;
unsigned int ysize_cm;
/* used to compute timing for graphics chips. */
unsigned char phsync;
unsigned char pvsync;
unsigned int x_mm;
unsigned int y_mm;
unsigned int pixel_clock;
unsigned int link_clock;
unsigned int ha;
unsigned int hbl;
unsigned int hso;
unsigned int hspw;
unsigned int hborder;
unsigned int va;
unsigned int vbl;
unsigned int vso;
unsigned int vspw;
unsigned int vborder;
/* 3 variables needed for coreboot framebuffer.
* In most cases, they are the same as the ha
* and va variables, but not always, as in the
* case of a 1366 wide display.
u32 x_resolution;
u32 y_resolution;
u32 bytes_per_line;
/* it is unlikely we need these things. */
/* if one of these is non-zero, use that one. */
unsigned int aspect_landscape;
unsigned int aspect_portrait;
const char *range_class;
const char *syncmethod;
const char *stereo;
/* Defined in src/lib/edid.c */
int decode_edid(unsigned char *edid, int size, struct edid *out);
void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr);
#endif /* EDID_H */