Hi Javier, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on linus/master v6.3-rc1 next-20230307] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Javier-Martinez-Canillas/drm-format-helper-Make-conversion_buf_size-support-sub-byte-pixel-fmts/20230308-033619 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230307193457.331360-1-javierm%40redhat.com patch subject: [PATCH] drm/format-helper: Make conversion_buf_size() support sub-byte pixel fmts config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230308/202303080420.T1VvHVxo-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/5f0f9d30de18661bdabebde361180893b8ddba27 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Javier-Martinez-Canillas/drm-format-helper-Make-conversion_buf_size-support-sub-byte-pixel-fmts/20230308-033619 git checkout 5f0f9d30de18661bdabebde361180893b8ddba27 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/gpu/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303080420.T1VvHVxo-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/gpu/drm/tests/drm_format_helper_test.c: In function 'conversion_buf_size': >> drivers/gpu/drm/tests/drm_format_helper_test.c:412:27: warning: variable 'cpp' set but not used [-Wunused-but-set-variable] 412 | unsigned int bpp, cpp; | ^~~ vim +/cpp +412 drivers/gpu/drm/tests/drm_format_helper_test.c 397 398 /* 399 * conversion_buf_size - Return the destination buffer size required to convert 400 * between formats. 401 * @dst_format: destination buffer pixel format (DRM_FORMAT_*) 402 * @dst_pitch: Number of bytes between two consecutive scanlines within dst 403 * @clip: Clip rectangle area to convert 404 * 405 * Returns: 406 * The size of the destination buffer or negative value on error. 407 */ 408 static size_t conversion_buf_size(u32 dst_format, unsigned int dst_pitch, 409 const struct drm_rect *clip) 410 { 411 const struct drm_format_info *dst_fi = drm_format_info(dst_format); > 412 unsigned int bpp, cpp; 413 414 if (!dst_fi) 415 return -EINVAL; 416 417 if (!dst_pitch) { 418 bpp = drm_format_info_bpp(dst_fi, 0); 419 cpp = DIV_ROUND_UP(bpp, 8); 420 dst_pitch = DIV_ROUND_UP(drm_rect_width(clip) * bpp, 8); 421 } 422 423 return dst_pitch * drm_rect_height(clip); 424 } 425 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
