1 files changed, 100 insertions, 0 deletions

diff --git a/tools/testing/selftests/media_tests/video_device_test.c b/tools/testing/selftests/media_tests/video_device_test.c
new file mode 100644
index 000000000000..66d419c28653
--- /dev/null
+++ b/tools/testing/selftests/media_tests/video_device_test.c
@@ -0,0 +1,100 @@
+/*
+ * 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--;
+        }
+}