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/*
* Copyright © 2012 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:
* Ben Widawsky <ben@bwidawsk.net>
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "drmtest.h"
#define SLEEP_DURATION 3000 // in milliseconds
#define RC6_FUDGE 900 // in milliseconds
static unsigned int readit(const char *path)
{
unsigned int ret;
int scanned;
FILE *file;
file = fopen(path, "r");
if (file == NULL) {
fprintf(stderr, "Couldn't open %s (%d)\n", path, errno);
abort();
}
scanned = fscanf(file, "%u", &ret);
igt_assert(scanned == 1);
fclose(file);
return ret;
}
int main(int argc, char *argv[])
{
const int device = drm_get_card();
char *path, *pathp, *pathpp;
int fd, ret;
unsigned int value1, value1p, value1pp, value2, value2p, value2pp;
FILE *file;
int diff;
igt_skip_on_simulation();
/* Use drm_open_any to verify device existence */
fd = drm_open_any();
close(fd);
ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_enable", device);
igt_assert(ret != -1);
/* For some reason my ivb isn't idle even after syncing up with the gpu.
* Let's add a sleept just to make it happy. */
sleep(5);
file = fopen(path, "r");
igt_require(file);
/* claim success if no rc6 enabled. */
if (readit(path) == 0)
igt_success();
ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_residency_ms", device);
igt_assert(ret != -1);
ret = asprintf(&pathp, "/sys/class/drm/card%d/power/rc6p_residency_ms", device);
igt_assert(ret != -1);
ret = asprintf(&pathpp, "/sys/class/drm/card%d/power/rc6pp_residency_ms", device);
igt_assert(ret != -1);
value1 = readit(path);
value1p = readit(pathp);
value1pp = readit(pathpp);
sleep(SLEEP_DURATION / 1000);
value2 = readit(path);
value2p = readit(pathp);
value2pp = readit(pathpp);
free(pathpp);
free(pathp);
free(path);
diff = (value2pp - value1pp) +
(value2p - value1p) +
(value2 - value1);
if (diff > (SLEEP_DURATION + RC6_FUDGE)) {
fprintf(stderr, "Diff was too high. That is unpossible\n");
igt_fail(1);
}
if (diff < (SLEEP_DURATION - RC6_FUDGE)) {
fprintf(stderr, "GPU was not in RC6 long enough. Check that "
"the GPU is as idle as possible (ie. no X, "
"running and running no other tests)\n");
igt_fail(1);
}
igt_success();
}
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