tegra_get_format_by_fourcc
fmtinfo = tegra_get_format_by_fourcc(chan->vi, sizes->pixel_format);
fmtinfo = tegra_get_format_by_fourcc(chan->vi, ivals->pixel_format);
fmtinfo = tegra_get_format_by_fourcc(chan->vi, pix->pixelformat);
fmtinfo = tegra_get_format_by_fourcc(chan->vi,
fmtinfo = tegra_get_format_by_fourcc(chan->vi, pix->pixelformat);