diff options
| author | Ronald G. Minnich <rminnich@google.com> | 2013-03-13 14:35:01 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-03-20 05:35:50 +0100 |
| commit | b3b72f350e22ecdfa8e228b820f46da805d4f230 (patch) | |
| tree | 95774693b92c4bf889710eda6970ff6437e8aa13 /src/include/edid.h | |
| parent | a95a13bd474fa7738840496b657cd46784e3f6b2 (diff) | |
| download | coreboot-b3b72f350e22ecdfa8e228b820f46da805d4f230.tar.xz | |
link/graphics: Add support for EDID
This code is taken from an EDID reader written at Red Hat.
The key function is
int decode_edid(unsigned char *edid, int size, struct edid *out)
Which takes a pointer to an EDID blob, and a size, and decodes it into
a machine-independent format in out, which may be used for driving
chipsets. The EDID blob might come for IO, or a compiled-in EDID
BLOB, or CBFS.
Also included are the changes needed to use the EDID code on Link.
Change-Id: I66b275b8ed28fd77cfa5978bdec1eeef9e9425f1
Signed-off-by: Ronald G. Minnich <rminnich@google.com>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2837
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/include/edid.h')
| -rw-r--r-- | src/include/edid.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/include/edid.h b/src/include/edid.h new file mode 100644 index 0000000000..6d76bb7efb --- /dev/null +++ b/src/include/edid.h @@ -0,0 +1,66 @@ +/* + * 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 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * 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; + unsigned int bpp; + 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 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; + /* 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; +}; + +int decode_edid(unsigned char *edid, int size, struct edid *out); +#endif /* EDID_H */ |