V4L2_TCH_FMT_TU16
*pixfmt = V4L2_TCH_FMT_TU16;
f->pixelformat = V4L2_TCH_FMT_TU16;
fmt->pixelformat = V4L2_TCH_FMT_TU16;
case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;