[frank-w-bpi-r2-4.14:5.17-r2pro-hdmi 43/46] drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2550:12: warning: stack frame size (1168) exceeds limit (1024) in 'vop2_bind'

[frank-w-bpi-r2-4.14:5.17-r2pro-hdmi 43/46] drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2550:12: warning: stack frame size (1168) exceeds limit (1024) in 'vop2_bind'

[kernel test robot]

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tree:   https://github.com/frank-w/BPI-R2-4.14 5.17-r2pro-hdmi
head:   47ea0858ec5d41e130b4ec8e1afc783d6de12db1
commit: 353c7a28cd93e3fcde708355f1d45fac06ae0556 [43/46] drm: rockchip: Add VOP2 driver
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20220127/202201271359.OvFmFHh5-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f400a6012c668dfaa73462caf067ceb074e66c47)
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/frank-w/BPI-R2-4.14/commit/353c7a28cd93e3fcde708355f1d45fac06ae0556
        git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14
        git fetch --no-tags frank-w-bpi-r2-4.14 5.17-r2pro-hdmi
        git checkout 353c7a28cd93e3fcde708355f1d45fac06ae0556
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/rockchip/

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/gpu/drm/rockchip/rockchip_drm_vop2.c:2550:12: warning: stack frame size (1168) exceeds limit (1024) in 'vop2_bind' [-Wframe-larger-than]
   static int vop2_bind(struct device *dev, struct device *master, void *data)
              ^
   1 warning generated.


vim +/vop2_bind +2550 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c

  2549	
> 2550	static int vop2_bind(struct device *dev, struct device *master, void *data)
  2551	{
  2552		struct platform_device *pdev = to_platform_device(dev);
  2553		const struct vop2_data *vop2_data;
  2554		struct drm_device *drm = data;
  2555		struct vop2 *vop2;
  2556		struct resource *res;
  2557		size_t alloc_size;
  2558		int ret;
  2559	
  2560		vop2_data = of_device_get_match_data(dev);
  2561		if (!vop2_data)
  2562			return -ENODEV;
  2563	
  2564		/* Allocate vop2 struct and its vop2_win array */
  2565		alloc_size = sizeof(*vop2) + sizeof(*vop2->win) * vop2_data->win_size;
  2566		vop2 = devm_kzalloc(dev, alloc_size, GFP_KERNEL);
  2567		if (!vop2)
  2568			return -ENOMEM;
  2569	
  2570		vop2->dev = dev;
  2571		vop2->data = vop2_data;
  2572		vop2->drm = drm;
  2573	
  2574		dev_set_drvdata(dev, vop2);
  2575	
  2576		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
  2577		if (!res) {
  2578			drm_err(vop2->drm, "failed to get vop2 register byname\n");
  2579			return -EINVAL;
  2580		}
  2581	
  2582		vop2->regs = devm_ioremap_resource(dev, res);
  2583		if (IS_ERR(vop2->regs))
  2584			return PTR_ERR(vop2->regs);
  2585		vop2->len = resource_size(res);
  2586	
  2587		vop2->map = devm_regmap_init_mmio(dev, vop2->regs, &vop2_regmap_config);
  2588	
  2589		ret = vop2_win_init(vop2);
  2590		if (ret)
  2591			return ret;
  2592	
  2593		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gamma_lut");
  2594		if (res) {
  2595			vop2->lut_regs = devm_ioremap_resource(dev, res);
  2596			if (IS_ERR(vop2->lut_regs))
  2597				return PTR_ERR(vop2->lut_regs);
  2598		}
  2599	
  2600		vop2->grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
  2601	
  2602		vop2->hclk = devm_clk_get(vop2->dev, "hclk");
  2603		if (IS_ERR(vop2->hclk)) {
  2604			drm_err(vop2->drm, "failed to get hclk source\n");
  2605			return PTR_ERR(vop2->hclk);
  2606		}
  2607	
  2608		vop2->aclk = devm_clk_get(vop2->dev, "aclk");
  2609		if (IS_ERR(vop2->aclk)) {
  2610			drm_err(vop2->drm, "failed to get aclk source\n");
  2611			return PTR_ERR(vop2->aclk);
  2612		}
  2613	
  2614		vop2->irq = platform_get_irq(pdev, 0);
  2615		if (vop2->irq < 0) {
  2616			drm_err(vop2->drm, "cannot find irq for vop2\n");
  2617			return vop2->irq;
  2618		}
  2619	
  2620		mutex_init(&vop2->vop2_lock);
  2621	
  2622		ret = devm_request_irq(dev, vop2->irq, vop2_isr, IRQF_SHARED, dev_name(dev), vop2);
  2623		if (ret)
  2624			return ret;
  2625	
  2626		ret = rockchip_drm_dma_attach_device(vop2->drm, vop2->dev);
  2627		if (ret) {
  2628			drm_err(vop2->drm, "failed to attach dma mapping, %d\n", ret);
  2629			return ret;
  2630		}
  2631	
  2632		ret = vop2_create_crtc(vop2);
  2633		if (ret)
  2634			return ret;
  2635	
  2636		pm_runtime_enable(&pdev->dev);
  2637	
  2638		return 0;
  2639	}
  2640	

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