[linux-next:master 7313/12815] drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c:1888:5: warning: stack frame size (2208) exceeds limit (2048) in 'rockchip_vpu981_av1_dec_run'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6352a698ca5bf26a9199202666b16cf741f579f6
commit: 727a400686a2c0d25015c9e44916a59b72882f83 [7313/12815] media: verisilicon: Add Rockchip AV1 decoder
config: riscv-randconfig-r021-20230701 (https://download.01.org/0day-ci/archive/20230701/202307010357.sY3iLanr-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230701/202307010357.sY3iLanr-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307010357.sY3iLanr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c:1888:5: warning: stack frame size (2208) exceeds limit (2048) in 'rockchip_vpu981_av1_dec_run' [-Wframe-larger-than]
   int rockchip_vpu981_av1_dec_run(struct hantro_ctx *ctx)
       ^
   375/2208 (16.98%) spills, 1833/2208 (83.02%) variables
   1 warning generated.


vim +/rockchip_vpu981_av1_dec_run +1888 drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c

  1887	
> 1888	int rockchip_vpu981_av1_dec_run(struct hantro_ctx *ctx)
  1889	{
  1890		struct hantro_dev *vpu = ctx->dev;
  1891		struct vb2_v4l2_buffer *vb2_src;
  1892		int ret;
  1893	
  1894		hantro_start_prepare_run(ctx);
  1895	
  1896		ret = rockchip_vpu981_av1_dec_prepare_run(ctx);
  1897		if (ret)
  1898			goto prepare_error;
  1899	
  1900		vb2_src = hantro_get_src_buf(ctx);
  1901		if (!vb2_src) {
  1902			ret = -EINVAL;
  1903			goto prepare_error;
  1904		}
  1905	
  1906		rockchip_vpu981_av1_dec_clean_refs(ctx);
  1907		rockchip_vpu981_av1_dec_frame_ref(ctx, vb2_src->vb2_buf.timestamp);
  1908	
  1909		rockchip_vpu981_av1_dec_set_parameters(ctx);
  1910		rockchip_vpu981_av1_dec_set_global_model(ctx);
  1911		rockchip_vpu981_av1_dec_set_tile_info(ctx);
  1912		rockchip_vpu981_av1_dec_set_reference_frames(ctx);
  1913		rockchip_vpu981_av1_dec_set_segmentation(ctx);
  1914		rockchip_vpu981_av1_dec_set_loopfilter(ctx);
  1915		rockchip_vpu981_av1_dec_set_picture_dimensions(ctx);
  1916		rockchip_vpu981_av1_dec_set_cdef(ctx);
  1917		rockchip_vpu981_av1_dec_set_lr(ctx);
  1918		rockchip_vpu981_av1_dec_set_prob(ctx);
  1919	
  1920		hantro_reg_write(vpu, &av1_dec_mode, AV1_DEC_MODE);
  1921		hantro_reg_write(vpu, &av1_dec_out_ec_byte_word, 0);
  1922		hantro_reg_write(vpu, &av1_write_mvs_e, 1);
  1923		hantro_reg_write(vpu, &av1_dec_out_ec_bypass, 1);
  1924		hantro_reg_write(vpu, &av1_dec_clk_gate_e, 1);
  1925	
  1926		hantro_reg_write(vpu, &av1_dec_abort_e, 0);
  1927		hantro_reg_write(vpu, &av1_dec_tile_int_e, 0);
  1928	
  1929		hantro_reg_write(vpu, &av1_dec_alignment, 64);
  1930		hantro_reg_write(vpu, &av1_apf_disable, 0);
  1931		hantro_reg_write(vpu, &av1_apf_threshold, 8);
  1932		hantro_reg_write(vpu, &av1_dec_buswidth, 2);
  1933		hantro_reg_write(vpu, &av1_dec_max_burst, 16);
  1934		hantro_reg_write(vpu, &av1_error_conceal_e, 0);
  1935		hantro_reg_write(vpu, &av1_axi_rd_ostd_threshold, 64);
  1936		hantro_reg_write(vpu, &av1_axi_wr_ostd_threshold, 64);
  1937	
  1938		hantro_reg_write(vpu, &av1_ext_timeout_cycles, 0xfffffff);
  1939		hantro_reg_write(vpu, &av1_ext_timeout_override_e, 1);
  1940		hantro_reg_write(vpu, &av1_timeout_cycles, 0xfffffff);
  1941		hantro_reg_write(vpu, &av1_timeout_override_e, 1);
  1942	
  1943		rockchip_vpu981_av1_dec_set_output_buffer(ctx);
  1944		rockchip_vpu981_av1_dec_set_input_buffer(ctx, vb2_src);
  1945	
  1946		hantro_end_prepare_run(ctx);
  1947	
  1948		hantro_reg_write(vpu, &av1_dec_e, 1);
  1949	
  1950		return 0;
  1951	
  1952	prepare_error:
  1953		hantro_end_prepare_run(ctx);
  1954		hantro_irq_done(vpu, VB2_BUF_STATE_ERROR);
  1955		return ret;
  1956	}
  1957	

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