Hi Chenyang, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on v5.18-rc3 next-20220422] [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] url: https://github.com/intel-lab-lkp/linux/commits/Chenyang-Li/drm-loongson-Add-DRM-Driver-for-Loongson-7A1000-bridge-chip/20220422-161914 base: git://anongit.freedesktop.org/drm/drm drm-next config: arm-randconfig-s031-20220422 (https://download.01.org/0day-ci/archive/20220423/202204230030.kZgmTGOQ-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/intel-lab-lkp/linux/commit/e9a9964d58e6cc797a113fa47f54583c10908d63 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Chenyang-Li/drm-loongson-Add-DRM-Driver-for-Loongson-7A1000-bridge-chip/20220422-161914 git checkout e9a9964d58e6cc797a113fa47f54583c10908d63 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash drivers/gpu/drm/loongson/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/loongson/loongson_drv.c:91:9: sparse: sparse: cast removes address space '__iomem' of expression drivers/gpu/drm/loongson/loongson_drv.c:99:5: sparse: sparse: symbol 'loongson_modeset_init' was not declared. Should it be static? vim +/__iomem +91 drivers/gpu/drm/loongson/loongson_drv.c 36 37 static int loongson_device_init(struct drm_device *dev) 38 { 39 struct loongson_device *ldev = to_loongson_device(dev); 40 struct pci_dev *pdev = to_pci_dev(dev->dev); 41 struct pci_dev *gpu_pdev; 42 resource_size_t aper_base; 43 resource_size_t aper_size; 44 resource_size_t mmio_base; 45 resource_size_t mmio_size; 46 int ret; 47 48 /* GPU MEM */ 49 /* We need get 7A-gpu pci device information for ldev->gpu_pdev */ 50 /* dev->pdev save 7A-dc pci device information */ 51 gpu_pdev = pci_get_device(PCI_VENDOR_ID_LOONGSON, 52 PCI_DEVICE_ID_LOONGSON_GPU, NULL); 53 ret = pci_enable_device(gpu_pdev); 54 if (ret) 55 return ret; 56 pci_set_drvdata(gpu_pdev, dev); 57 58 aper_base = pci_resource_start(gpu_pdev, 2); 59 aper_size = pci_resource_len(gpu_pdev, 2); 60 ldev->vram_start = aper_base; 61 ldev->vram_size = aper_size; 62 63 if (!devm_request_mem_region(dev->dev, ldev->vram_start, 64 ldev->vram_size, "loongson_vram")) { 65 drm_err(dev, "Can't reserve VRAM\n"); 66 return -ENXIO; 67 } 68 69 /* DC MEM */ 70 mmio_base = pci_resource_start(pdev, 0); 71 mmio_size = pci_resource_len(pdev, 0); 72 ldev->mmio = devm_ioremap(dev->dev, mmio_base, mmio_size); 73 if (!ldev->mmio) { 74 drm_err(dev, "Cannot map mmio region\n"); 75 return -ENOMEM; 76 } 77 78 if (!devm_request_mem_region(dev->dev, mmio_base, 79 mmio_size, "loongson_mmio")) { 80 drm_err(dev, "Can't reserve mmio registers\n"); 81 return -ENOMEM; 82 } 83 84 /* DC IO */ 85 ldev->io = devm_ioremap(dev->dev, LS7A_CHIPCFG_REG_BASE, 0xf); 86 if (!ldev->io) 87 return -ENOMEM; 88 89 ldev->num_crtc = 2; 90 > 91 drm_info(dev, "DC mmio base 0x%llx size 0x%llx io 0x%llx\n", 92 mmio_base, mmio_size, *(u64 *)ldev->io); 93 drm_info(dev, "GPU vram start = 0x%x size = 0x%x\n", 94 ldev->vram_start, ldev->vram_size); 95 96 return 0; 97 } 98 -- 0-DAY CI Kernel Test Service https://01.org/lkp
