[chrome-os:chromeos-5.10 9848/9999] drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c:157:13: warning: variable 'y_header_ofst' set but not used

[kernel test robot <lkp@intel.com>]

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Hi Roy-CW,

FYI, the error/warning still remains.

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10
head:   c1bccbd19bf74ce7393ae038f9d54e3e7add64db
commit: 53806600d759c71fc68bd616559de2035eed9398 [9848/9999] CHROMIUM: media: platform: mtk-mdp3: Add support MT8195
config: ia64-allmodconfig (https://download.01.org/0day-ci/archive/20220105/202201051316.37zGOnYo-lkp(a)intel.com/config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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
        git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel
        git fetch --no-tags chrome-os chromeos-5.10
        git checkout 53806600d759c71fc68bd616559de2035eed9398
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/media/platform/mtk-mdp3/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c: In function 'mdp_fmt_get_hyfbc_plane_size':
   drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c:159:13: warning: variable 'c_header_ofst' set but not used [-Wunused-but-set-variable]
     159 |         u32 c_header_ofst = 0;
         |             ^~~~~~~~~~~~~
>> drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c:157:13: warning: variable 'y_header_ofst' set but not used [-Wunused-but-set-variable]
     157 |         u32 y_header_ofst = 0;
         |             ^~~~~~~~~~~~~


vim +/y_header_ofst +157 drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c

   149	
   150	static u32 mdp_fmt_get_hyfbc_plane_size(u32 width, u32 height, u32 color)
   151	{
   152		u32 y_data_size = 0;
   153		u32 c_data_size = 0;
   154		u32 y_header_size = 0;
   155		u32 c_header_size = 0;
   156		u32 y_data_ofst = 0;
 > 157		u32 y_header_ofst = 0;
   158		u32 c_data_ofst = 0;
 > 159		u32 c_header_ofst = 0;
   160	
   161		y_data_size = (((width + 63) >> 6) << 6) * (((height + 63) >> 6) << 6);
   162		y_header_size = y_data_size >> 6;
   163		if (MDP_COLOR_IS_10BIT_PACKED(color))
   164			y_data_size = (y_data_size * 6) >> 2;
   165	
   166		c_data_size = y_data_size >> 1;
   167		c_header_size = (((y_header_size >> 1) + 63) >> 6) << 6;
   168	
   169		// Setup source buffer base
   170		y_data_ofst = ((y_header_size + 4095) >> 12) << 12; // align 4k
   171		y_header_ofst = y_data_ofst - y_header_size;
   172		c_data_ofst = ((y_data_ofst + y_data_size + c_header_size + 4095) >> 12) << 12; // align 4k
   173		c_header_ofst = c_data_ofst - c_header_size;
   174	
   175		return (c_data_ofst + c_data_size);
   176	}
   177	

---
0-DAY CI Kernel Test Service, Intel Corporation
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