vivid_get_format
if (vivid_get_format(dev, fsize->pixel_format) == NULL)
fmt = vivid_get_format(dev, fival->pixel_format);
fmt = vivid_get_format(dev, mp->pixelformat);
fmt = vivid_get_format(dev, mp->pixelformat);
dev->fmt_cap = vivid_get_format(dev, mp->pixelformat);
const struct vivid_fmt *vivid_get_format(struct vivid_dev *dev, u32 pixelformat);
fmt = vivid_get_format(dev, mp->pixelformat);
fmt = vivid_get_format(dev, mp->pixelformat);
dev->fmt_out = vivid_get_format(dev, mp->pixelformat);