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selftests: media_tests: Add new subtest to video_device_test

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Add new subtest to video_device_test to cover the VIDIOC_G_PRIORITY
and VIDIOC_S_PRIORITY ioctl calls. This test tries to set the priority
associated with the file descriptior via ioctl VIDIOC_S_PRIORITY
command from V4L2 API. After that, the test tries to get the new
priority via VIDIOC_G_PRIORITY ioctl command and compares the result
with the v4l2_priority it set before. At the end, the test restores the
old priority.

This test will increase the code coverage for video_device_test, so
I think it might be useful. Additionally, this patch will refactor the
video_device_test a little bit, according to the new functionality.

Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Ivan Orlov 2023-04-06 00:04:50 +04:00 committed by Shuah Khan
parent 858fd168a9
commit e42bf3cfed
1 changed files with 84 additions and 29 deletions
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113
tools/testing/selftests/media_tests/video_device_test.c
View file

@ -37,45 +37,58 @@
#include <time.h>
#include <linux/videodev2.h>
int main(int argc, char **argv)
#define PRIORITY_MAX 4
int priority_test(int fd)
{
/* This test will try to update the priority associated with a file descriptor */
enum v4l2_priority old_priority, new_priority, priority_to_compare;
int ret;
int result = 0;
ret = ioctl(fd, VIDIOC_G_PRIORITY, &old_priority);
if (ret < 0) {
printf("Failed to get priority: %s\n", strerror(errno));
return -1;
}
new_priority = (old_priority + 1) % PRIORITY_MAX;
ret = ioctl(fd, VIDIOC_S_PRIORITY, &new_priority);
if (ret < 0) {
printf("Failed to set priority: %s\n", strerror(errno));
return -1;
}
ret = ioctl(fd, VIDIOC_G_PRIORITY, &priority_to_compare);
if (ret < 0) {
printf("Failed to get new priority: %s\n", strerror(errno));
result = -1;
goto cleanup;
}
if (priority_to_compare != new_priority) {
printf("Priority wasn't set - test failed\n");
result = -1;
}
cleanup:
ret = ioctl(fd, VIDIOC_S_PRIORITY, &old_priority);
if (ret < 0) {
printf("Failed to restore priority: %s\n", strerror(errno));
return -1;
}
return result;
}
int loop_test(int fd)
{
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"
@ -98,4 +111,46 @@ int main(int argc, char **argv)
sleep(10);
count--;
}
return 0;
}
int main(int argc, char **argv)
{
int opt;
char video_dev[256];
int fd;
int test_result;
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);
}
}
/* 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);
}
test_result = priority_test(fd);
if (!test_result)
printf("Priority test - PASSED\n");
else
printf("Priority test - FAILED\n");
loop_test(fd);
}