Hello there, [linux-next/drivers/gpu/drm/rockchip/dw-mipi-dsi.c:470]: (style) Checking if unsigned variable 'bpp' is less than zero. bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); if (bpp < 0) { but unsigned int bpp, i, pre; Suggest code rework. Regards David Binderman