101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
|
/*
|
||
|
|
* video_device_test - Video Device Test
|
||
|
|
*
|
||
|
|
* Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com>
|
||
|
|
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
|
||
|
|
*
|
||
|
|
* This file is released under the GPLv2.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file adds a test for Video Device. This test should not be included
|
||
|
|
* in the Kselftest run. This test should be run when hardware and driver
|
||
|
|
* that makes use of V4L2 API is present.
|
||
|
|
*
|
||
|
|
* This test opens user specified Video Device and calls video ioctls in a
|
||
|
|
* loop once every 10 seconds.
|
||
|
|
*
|
||
|
|
* Usage:
|
||
|
|
* sudo ./video_device_test -d /dev/videoX
|
||
|
|
*
|
||
|
|
* While test is running, remove the device or unbind the driver and
|
||
|
|
* ensure there are no use after free errors and other Oops in the
|
||
|
|
* dmesg.
|
||
|
|
* When possible, enable KaSan kernel config option for use-after-free
|
||
|
|
* error detection.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <sys/ioctl.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <time.h>
|
||
|
|
#include <linux/videodev2.h>
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int opt;
|
||
|
|
char video_dev[256];
|
||
|
|
int count;
|
||
|
|
struct v4l2_tuner vtuner;
|
||
|
|
struct v4l2_capability vcap;
|
||
|
|
int ret;
|
||
|
|
int fd;
|
||
|
|
|
||
|
|
if (argc < 2) {
|
||
|
|
printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
|
||
|
|
exit(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Process arguments */
|
||
|
|
while ((opt = getopt(argc, argv, "d:")) != -1) {
|
||
|
|
switch (opt) {
|
||
|
|
case 'd':
|
||
|
|
strncpy(video_dev, optarg, sizeof(video_dev) - 1);
|
||
|
|
video_dev[sizeof(video_dev)-1] = '\0';
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
printf("Usage: %s [-d </dev/videoX>]\n", argv[0]);
|
||
|
|
exit(-1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Generate random number of interations */
|
||
|
|
srand((unsigned int) time(NULL));
|
||
|
|
count = rand();
|
||
|
|
|
||
|
|
/* Open Video device and keep it open */
|
||
|
|
fd = open(video_dev, O_RDWR);
|
||
|
|
if (fd == -1) {
|
||
|
|
printf("Video Device open errno %s\n", strerror(errno));
|
||
|
|
exit(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("\nNote:\n"
|
||
|
|
"While test is running, remove the device or unbind\n"
|
||
|
|
"driver and ensure there are no use after free errors\n"
|
||
|
|
"and other Oops in the dmesg. When possible, enable KaSan\n"
|
||
|
|
"kernel config option for use-after-free error detection.\n\n");
|
||
|
|
|
||
|
|
while (count > 0) {
|
||
|
|
ret = ioctl(fd, VIDIOC_QUERYCAP, &vcap);
|
||
|
|
if (ret < 0)
|
||
|
|
printf("VIDIOC_QUERYCAP errno %s\n", strerror(errno));
|
||
|
|
else
|
||
|
|
printf("Video device driver %s\n", vcap.driver);
|
||
|
|
|
||
|
|
ret = ioctl(fd, VIDIOC_G_TUNER, &vtuner);
|
||
|
|
if (ret < 0)
|
||
|
|
printf("VIDIOC_G_TUNER, errno %s\n", strerror(errno));
|
||
|
|
else
|
||
|
|
printf("type %d rangelow %d rangehigh %d\n",
|
||
|
|
vtuner.type, vtuner.rangelow, vtuner.rangehigh);
|
||
|
|
sleep(10);
|
||
|
|
count--;
|
||
|
|
}
|
||
|
|
}
|