atomisp_try_fmt
ret = atomisp_try_fmt(isp, &f->fmt.pix, &format_bridge, &snr_format_bridge);
int atomisp_try_fmt(struct atomisp_device *isp, struct v4l2_pix_format *f,
return atomisp_try_fmt(isp, &f->fmt.pix, NULL, NULL);