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/*
* Copyright © 2016 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.
*/
/**
* TEST: kms sysfs edid timing
* Category: Display
* Description: Test to check the time it takes to reprobe each connector.
* Driver requirement: i915, xe
* Mega feature: General Display Features
*/
#include "igt.h"
#include <dirent.h>
#include <fcntl.h>
#include <limits.h> // PATH_MAX
#include <sys/stat.h>
/**
* SUBTEST:
* Description: This test checks the time it takes to reprobe each connector and
* fails if either the time it takes for one reprobe is too long or
* if the mean time it takes to reprobe one connector is too long.
* Additionally, make sure that the mean time for all connectors is
* not too long.
*/
#define THRESHOLD_PER_CONNECTOR 150
#define THRESHOLD_PER_CONNECTOR_MEAN 140
#define THRESHOLD_ALL_CONNECTORS_MEAN 100
#define CHECK_TIMES 16
IGT_TEST_DESCRIPTION("This test checks the time it takes to reprobe each "
"connector and fails if either the time it takes for "
"one reprobe is too long or if the mean time it takes "
"to reprobe one connector is too long. Additionally, "
"make sure that the mean time for all connectors is "
"not too long.");
igt_simple_main
{
DIR *dirp;
struct dirent *de;
struct igt_mean all_mean;
dirp = opendir("/sys/class/drm");
igt_assert(dirp != NULL);
igt_mean_init(&all_mean);
while ((de = readdir(dirp))) {
struct igt_mean mean = {};
struct stat st;
char path[PATH_MAX];
int i;
if (*de->d_name == '.')
continue;;
snprintf(path, sizeof(path), "/sys/class/drm/%s/status",
de->d_name);
if (stat(path, &st))
continue;
igt_mean_init(&mean);
for (i = 0; i < CHECK_TIMES; i++) {
struct timespec ts = {};
int fd;
uint64_t current;
if ((fd = open(path, O_WRONLY)) < 0)
continue;
igt_kmsg(KMSG_DEBUG "%s: start detect\n", path);
igt_nsec_elapsed(&ts);
igt_ignore_warn(write(fd, "detect\n", 7));
current = igt_nsec_elapsed(&ts);
igt_kmsg(KMSG_DEBUG "%s: end detect\n", path);
close(fd);
/*
* Skip first detect to account for slower PPS or
* misbehaving panel that has non-standard HPDs behavior
*/
if (i == 0)
continue;
igt_mean_add(&mean, current);
igt_debug("%s: i=%d current=%02fdms mean.max=%02fms mean.min=%02fms\n",
de->d_name, i, current/1e6, mean.max/1e6, mean.min/1e6);
}
igt_debug("%s: mean.max %.2fns, %.2fus, %.2fms, "
"mean.avg %.2fns, %.2fus, %.2fms\n",
de->d_name,
mean.max, mean.max / 1e3, mean.max / 1e6,
mean.mean, mean.mean / 1e3, mean.mean / 1e6);
igt_assert_f(mean.max < THRESHOLD_PER_CONNECTOR * 1e6,
"%s: single probe time exceeded %dms, max=%.2fms, avg=%.2fms\n",
de->d_name, THRESHOLD_PER_CONNECTOR,
mean.max / 1e6, mean.mean / 1e6);
igt_assert_f(mean.mean < (THRESHOLD_PER_CONNECTOR_MEAN * 1e6),
"%s: mean probe time exceeded %dms, max=%.2fms, avg=%.2fms\n",
de->d_name, THRESHOLD_PER_CONNECTOR_MEAN,
mean.max / 1e6, mean.mean / 1e6);
igt_mean_add(&all_mean, mean.mean);
}
igt_assert_f(all_mean.mean < THRESHOLD_ALL_CONNECTORS_MEAN * 1e6,
"Mean of all connector means exceeds %dms, max=%.2fms, mean=%.2fms\n",
THRESHOLD_ALL_CONNECTORS_MEAN, all_mean.max / 1e6,
all_mean.mean / 1e6);
closedir(dirp);
}
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