Re: [PATCH v3 15/17] drm/mediatek: add ovlsys_adaptor support for MT8196

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

Hi paul-pl.chen,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.15-rc6 next-20250515]
[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/paul-pl-chen/dt-bindings-soc-mediatek-add-mutex-yaml-for-MT8196/20250515-173733
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20250515093454.1729720-16-paul-pl.chen%40mediatek.com
patch subject: [PATCH v3 15/17] drm/mediatek: add ovlsys_adaptor support for MT8196
config: arm64-randconfig-001-20250516 (https://download.01.org/0day-ci/archive/20250516/202505161422.JeAeW3Pd-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250516/202505161422.JeAeW3Pd-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/202505161422.JeAeW3Pd-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/gpu/drm/mediatek/mtk_drm_drv.c: In function 'mtk_drm_ovl_adaptor_probe':
>> drivers/gpu/drm/mediatek/mtk_drm_drv.c:1071:32: error: storage size of 'ovlsys_priv' isn't known
    1071 |  struct mtk_drm_ovlsys_private ovlsys_priv;
         |                                ^~~~~~~~~~~
>> drivers/gpu/drm/mediatek/mtk_drm_drv.c:1071:32: warning: unused variable 'ovlsys_priv' [-Wunused-variable]
   drivers/gpu/drm/mediatek/mtk_drm_drv.c: In function 'mtk_drm_probe':
   drivers/gpu/drm/mediatek/mtk_drm_drv.c:1145:50: error: 'DDP_COMPONENT_DRM_OVLSYS_ADAPTOR2' undeclared (first use in this function); did you mean 'DDP_COMPONENT_DRM_OVLSYS_ADAPTOR0'?
    1145 |  mtk_drm_ovl_adaptor_probe(dev, private, &match, DDP_COMPONENT_DRM_OVLSYS_ADAPTOR2);
         |                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |                                                  DDP_COMPONENT_DRM_OVLSYS_ADAPTOR0
   drivers/gpu/drm/mediatek/mtk_drm_drv.c:1145:50: note: each undeclared identifier is reported only once for each function it appears in


vim +1071 drivers/gpu/drm/mediatek/mtk_drm_drv.c

  1066	
  1067	static void mtk_drm_ovl_adaptor_probe(struct device *dev, struct mtk_drm_private *private,
  1068					      struct component_match **match, enum mtk_ddp_comp_id id)
  1069	{
  1070		struct platform_device *ovl_adaptor;
> 1071		struct mtk_drm_ovlsys_private ovlsys_priv;
  1072		bool is_ovlsys = (id != DDP_COMPONENT_DRM_OVL_ADAPTOR);
  1073		char *dev_name = is_ovlsys ? "mediatek-disp-ovlsys-adaptor" : "mediatek-disp-ovl-adaptor";
  1074		void *drv_data = is_ovlsys ? (void *)&ovlsys_priv : (void *)private->mmsys_dev;
  1075		size_t data_size = is_ovlsys ? sizeof(ovlsys_priv) : sizeof(*private->mmsys_dev);
  1076	
  1077		if (mtk_drm_find_mmsys_comp(private, id, &ovlsys_priv.use_path)) {
  1078			ovlsys_priv.mmsys_dev = private->mmsys_dev;
  1079			ovl_adaptor = platform_device_register_data(dev, dev_name, PLATFORM_DEVID_AUTO,
  1080								    drv_data, data_size);
  1081			private->ddp_comp[id].dev = &ovl_adaptor->dev;
  1082			mtk_ddp_comp_init(NULL, &private->ddp_comp[id], id);
  1083			component_match_add(dev, match, compare_dev, &ovl_adaptor->dev);
  1084		}
  1085	}
  1086	

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