vidioc_queryctrl 819 drivers/media/usb/pvrusb2/pvrusb2-v4l2.c .vidioc_queryctrl = pvr2_queryctrl, vidioc_queryctrl 1489 drivers/media/usb/uvc/uvc_v4l2.c .vidioc_queryctrl = uvc_ioctl_queryctrl, vidioc_queryctrl 558 drivers/media/v4l2-core/v4l2-dev.c if (vdev->ctrl_handler || ops->vidioc_queryctrl) vidioc_queryctrl 2085 drivers/media/v4l2-core/v4l2-ioctl.c if (ops->vidioc_queryctrl) vidioc_queryctrl 2086 drivers/media/v4l2-core/v4l2-ioctl.c return ops->vidioc_queryctrl(file, fh, p); vidioc_queryctrl 460 include/media/v4l2-ioctl.h int (*vidioc_queryctrl)(struct file *file, void *fh,