b3b72f350e
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>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2013 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EDID_H
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#define EDID_H
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/* structure for communicating EDID information from a raw EDID block to
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* higher level functions.
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* The size of the data types is not critical, so we leave them as
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* unsigned int. We can move more into into this struct as needed.
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*/
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struct edid {
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char manuf_name[4];
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unsigned int model;
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unsigned int serial;
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unsigned int year;
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unsigned int week;
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unsigned int version[2];
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unsigned int nonconformant;
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unsigned int type;
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unsigned int bpp;
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unsigned int voltage;
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unsigned int sync;
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unsigned int xsize_cm;
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unsigned int ysize_cm;
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/* used to compute timing for graphics chips. */
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unsigned char phsync;
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unsigned char pvsync;
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unsigned int ha;
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unsigned int hbl;
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unsigned int hso;
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unsigned int hspw;
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unsigned int hborder;
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unsigned int va;
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unsigned int vbl;
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unsigned int vso;
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unsigned int vspw;
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unsigned int vborder;
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/* it is unlikely we need these things. */
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/* if one of these is non-zero, use that one. */
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unsigned int aspect_landscape;
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unsigned int aspect_portrait;
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const char *range_class;
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const char *syncmethod;
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const char *stereo;
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};
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int decode_edid(unsigned char *edid, int size, struct edid *out);
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#endif /* EDID_H */
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