Re: [PATCH 2/2] media: meson: vdec: add HEVC decode codec

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

Hi Christian,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on media-tree/master]
[also build test WARNING on linus/master v6.2-rc5 next-20230123]
[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/Christian-Hewitt/media-meson-vdec-implement-10bit-bitstream-handling/20230123-213323
base:   git://linuxtv.org/media_tree.git master
patch link:    https://lore.kernel.org/r/20230123133113.3254659-3-christianshewitt%40gmail.com
patch subject: [PATCH 2/2] media: meson: vdec: add HEVC decode codec
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230124/202301240007.NkZA19qq-lkp@intel.com/config)
compiler: sparc64-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/498d420e9c7cdc6e694be643c47ee69c8b5b2142
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Christian-Hewitt/media-meson-vdec-implement-10bit-bitstream-handling/20230123-213323
        git checkout 498d420e9c7cdc6e694be643c47ee69c8b5b2142
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash drivers/staging/

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

All warnings (new ones prefixed by >>):

   drivers/staging/media/meson/vdec/codec_hevc.c: In function 'codec_hevc_set_mpred_mv':
>> drivers/staging/media/meson/vdec/codec_hevc.c:1002:13: warning: variable 'val' set but not used [-Wunused-but-set-variable]
    1002 |         u32 val;
         |             ^~~


vim +/val +1002 drivers/staging/media/meson/vdec/codec_hevc.c

   990	
   991	static void codec_hevc_set_mpred_mv(struct amvdec_core *core,
   992					    struct codec_hevc *hevc,
   993					    struct hevc_frame *frame,
   994					    struct hevc_frame *col_frame)
   995	{
   996		union rpm_param *param = &hevc->rpm_param;
   997		u32 lcu_size_log2 = ilog2(hevc->lcu_size);
   998		u32 mv_mem_unit = lcu_size_log2 == 6 ? 0x200 :
   999				  lcu_size_log2 == 5 ? 0x80 : 0x20;
  1000		dma_addr_t col_mv_rd_start_addr, col_mv_rd_ptr, col_mv_rd_end_addr;
  1001		dma_addr_t mpred_mv_wr_ptr;
> 1002		u32 val;
  1003	
  1004		val = amvdec_read_dos(core, HEVC_MPRED_CURR_LCU);
  1005	
  1006		col_mv_rd_start_addr = codec_hevc_get_frame_mv_paddr(hevc, col_frame);
  1007		mpred_mv_wr_ptr = codec_hevc_get_frame_mv_paddr(hevc, frame) +
  1008				  (hevc->slice_addr * mv_mem_unit);
  1009		col_mv_rd_ptr = col_mv_rd_start_addr +
  1010				(hevc->slice_addr * mv_mem_unit);
  1011		col_mv_rd_end_addr = col_mv_rd_start_addr +
  1012				     (hevc->lcu_total * mv_mem_unit);
  1013	
  1014		amvdec_write_dos(core, HEVC_MPRED_MV_WR_START_ADDR,
  1015				 codec_hevc_get_frame_mv_paddr(hevc, frame));
  1016		amvdec_write_dos(core, HEVC_MPRED_MV_RD_START_ADDR,
  1017				 col_mv_rd_start_addr);
  1018	
  1019		if (param->p.slice_segment_address == 0) {
  1020			amvdec_write_dos(core, HEVC_MPRED_ABV_START_ADDR,
  1021					 hevc->workspace_paddr + MPRED_ABV_OFFSET);
  1022			amvdec_write_dos(core, HEVC_MPRED_MV_WPTR, mpred_mv_wr_ptr);
  1023			amvdec_write_dos(core, HEVC_MPRED_MV_RPTR,
  1024					 col_mv_rd_start_addr);
  1025		} else {
  1026			amvdec_write_dos(core, HEVC_MPRED_MV_RPTR, col_mv_rd_ptr);
  1027		}
  1028	
  1029		amvdec_write_dos(core, HEVC_MPRED_MV_RD_END_ADDR, col_mv_rd_end_addr);
  1030	}
  1031	

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