v4l2_m2m_ioctl_encoder_cmd
err = v4l2_m2m_ioctl_encoder_cmd(file, fh, cmd);
ret = v4l2_m2m_ioctl_encoder_cmd(file, &ctx->fh, cmd);
.vidioc_encoder_cmd = v4l2_m2m_ioctl_encoder_cmd,
ret = v4l2_m2m_ioctl_encoder_cmd(file, fh, cmd);
ret = v4l2_m2m_ioctl_encoder_cmd(file, priv, ec);
ret = v4l2_m2m_ioctl_encoder_cmd(file, priv, ec);
EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_encoder_cmd);
int v4l2_m2m_ioctl_encoder_cmd(struct file *file, void *priv,