[steev:lenovo-x13s-linux-v6.3.0 144/157] drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:649:28: warning: variable 'i' is uninitialized when used here

[steev:lenovo-x13s-linux-v6.3.0 144/157] drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:649:28: warning: variable 'i' is uninitialized when used here

[kernel test robot]

tree:   https://github.com/steev/linux lenovo-x13s-linux-v6.3.0
head:   dcb4f9644df6b6eab8d660a91c2a307d79b54020
commit: 558e3820e2f31f7438304aef66c6748783f991a0 [144/157] drm/msm/dpu: add HDMI output support
config: arm64-randconfig-r013-20230423 (https://download.01.org/0day-ci/archive/20230424/202304241515.ornmzM1i-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/steev/linux/commit/558e3820e2f31f7438304aef66c6748783f991a0
        git remote add steev https://github.com/steev/linux
        git fetch --no-tags steev lenovo-x13s-linux-v6.3.0
        git checkout 558e3820e2f31f7438304aef66c6748783f991a0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/msm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304241515.ornmzM1i-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:649:28: warning: variable 'i' is uninitialized when used here [-Wuninitialized]
           info.h_tile_instance[0] = i;
                                     ^
   drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:629:7: note: initialize the variable 'i' to silence this warning
           int i;
                ^
                 = 0
   1 warning generated.


vim +/i +649 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

   621	
   622	static int _dpu_kms_initialize_hdmi(struct drm_device *dev,
   623					    struct msm_drm_private *priv,
   624					    struct dpu_kms *dpu_kms)
   625	{
   626		struct drm_encoder *encoder = NULL;
   627		struct msm_display_info info;
   628		int rc;
   629		int i;
   630	
   631		if (!priv->hdmi)
   632			return 0;
   633	
   634		encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_TMDS);
   635		if (IS_ERR(encoder)) {
   636			DPU_ERROR("encoder init failed for HDMI display\n");
   637			return PTR_ERR(encoder);
   638		}
   639	
   640		memset(&info, 0, sizeof(info));
   641		rc = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
   642		if (rc) {
   643			DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc);
   644			drm_encoder_cleanup(encoder);
   645			return rc;
   646		}
   647	
   648		info.num_of_h_tiles = 1;
 > 649		info.h_tile_instance[0] = i;
   650		info.intf_type = INTF_HDMI;
   651		rc = dpu_encoder_setup(dev, encoder, &info);
   652		if (rc) {
   653			DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
   654				  encoder->base.id, rc);
   655			return rc;
   656		}
   657	
   658		return 0;
   659	}
   660	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests