Hi Vinod, I love your patch! Perhaps something to improve: [auto build test WARNING on v5.13] [cannot apply to linus/master v5.14-rc1 next-20210716] [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] url: https://github.com/0day-ci/linux/commits/Vinod-Koul/drm-msm-Add-Display-S... base: 62fb9874f5da54fdb243003b386128037319b219 config: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 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/0day-ci/linux/commit/e61efb569c28d8036eb18f53763c195c1... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vinod-Koul/drm-msm-Add-Display-Stream-Compression-Support/20210715-145540 git checkout e61efb569c28d8036eb18f53763c195c16d8a396 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c: In function 'dpu_encoder_prep_dsc': 1911 | int pic_width, pic_height; | ^~~~~~~~~~ vim +/pic_height +1911 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 1900 1901 static void dpu_encoder_prep_dsc(struct dpu_encoder_virt *dpu_enc, 1902 struct msm_display_dsc_config *dsc) 1903 { 1904 /* coding only for 2LM, 2enc, 1 dsc config */ 1905 struct dpu_encoder_phys *enc_master = dpu_enc->cur_master; 1906 struct dpu_hw_dsc *hw_dsc[MAX_CHANNELS_PER_ENC]; 1907 struct dpu_hw_pingpong *hw_pp[MAX_CHANNELS_PER_ENC]; 1908 int this_frame_slices; 1909 int intf_ip_w, enc_ip_w; 1910 int dsc_common_mode; 1912 int i; 1913 1914 for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) { 1915 hw_pp[i] = dpu_enc->hw_pp[i]; 1916 hw_dsc[i] = dpu_enc->hw_dsc[i]; 1917 1918 if (!hw_pp[i] || !hw_dsc[i]) { 1919 DPU_ERROR_ENC(dpu_enc, "invalid params for DSC\n"); 1920 return; 1921 } 1922 } 1923 1924 dsc_common_mode = 0; 1925 pic_width = dsc->drm->pic_width; 1926 pic_height = dsc->drm->pic_height; 1927 1928 dsc_common_mode = DSC_MODE_MULTIPLEX | DSC_MODE_SPLIT_PANEL; 1929 if (enc_master->intf_mode == INTF_MODE_VIDEO) 1930 dsc_common_mode |= DSC_MODE_VIDEO; 1931 1932 this_frame_slices = pic_width / dsc->drm->slice_width; 1933 intf_ip_w = this_frame_slices * dsc->drm->slice_width; 1934 1935 dpu_encoder_dsc_pclk_param_calc(dsc, intf_ip_w); 1936 1937 /* 1938 * dsc merge case: when using 2 encoders for the same stream, 1939 * no. of slices need to be same on both the encoders. 1940 */ 1941 enc_ip_w = intf_ip_w / 2; 1942 dpu_encoder_dsc_initial_line_calc(dsc, enc_ip_w); 1943 1944 for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) 1945 dpu_encoder_dsc_pipe_cfg(hw_dsc[i], hw_pp[i], dsc, dsc_common_mode); 1946 } 1947 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org