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/*
* Copyright © 2019 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: Simon Ser <simon.ser@intel.com>
*/
#include "config.h"
#include <stdbool.h>
#include "igt_core.h"
#include "igt_kms.h"
#include "igt_edid.h"
static const unsigned char edid_header[] = {
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
};
/**
* Sanity check the header of the base EDID block.
*/
static bool edid_header_is_valid(const unsigned char *raw_edid)
{
size_t i;
for (i = 0; i < sizeof(edid_header); i++)
if (raw_edid[i] != edid_header[i])
return false;
return true;
}
/**
* Sanity check the checksum of the EDID block.
*/
static bool edid_block_checksum(const unsigned char *raw_edid)
{
size_t i;
unsigned char csum = 0;
for (i = 0; i < EDID_BLOCK_SIZE; i++) {
csum += raw_edid[i];
}
return csum == 0;
}
typedef const struct edid *(*get_edid_func)(void);
igt_simple_main
{
const struct {
const char *desc;
get_edid_func f;
size_t exts;
} funcs[] = {
{ "base", igt_kms_get_base_edid, 0 },
{ "alt", igt_kms_get_alt_edid, 0 },
{ "hdmi_audio", igt_kms_get_hdmi_audio_edid, 1 },
{ "4k", igt_kms_get_4k_edid, 1 },
{ "3d", igt_kms_get_3d_edid, 1 },
{0},
}, *f;
const struct edid *edid;
const uint8_t *raw_edid, *raw_block;
size_t i;
for (f = funcs; f->f; f++) {
edid = f->f();
raw_edid = (uint8_t *) edid;
igt_assert_f(edid_header_is_valid(raw_edid),
"invalid header on %s EDID", f->desc);
/* check base edid block */
igt_assert_f(edid_block_checksum(raw_edid),
"checksum failed on %s EDID", f->desc);
/* check extension blocks, if any */
igt_assert_f(raw_edid[126] == f->exts,
"unexpected number of extensions on %s EDID",
f->desc);
for (i = 0; i < f->exts; i++) {
raw_block = raw_edid + (i + 1) * EDID_BLOCK_SIZE;
igt_assert_f(edid_block_checksum(raw_block),
"CEA block checksum failed on %s EDID",
f->desc);
}
}
}
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