Hi Moudy,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on robh/for-next mediatek/for-next v5.14-rc2 next-20210719]
[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/0day-ci/linux/commits/Moudy-Ho/media-mediatek-support-mdp3-on-mt8183-platform/20210719-154845
base:   git://linuxtv.org/media_tree.git master
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 10.3.0
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/0day-ci/linux/commit/ca5b8c1fac55efa08e8362a4aa345c474b798326
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Moudy-Ho/media-mediatek-support-mdp3-on-mt8183-platform/20210719-154845
        git checkout ca5b8c1fac55efa08e8362a4aa345c474b798326
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arc 

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/media/platform/mtk-mdp3/mtk-mdp3-comp.c: In function 'mdp_sub_comps_create':
>> drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.c:1232:29: warning: implicit conversion from 'enum mdp_comp_id' to 'enum mdp_comp_type' [-Wenum-conversion]
    1232 |   enum mdp_comp_type type = MDP_COMP_NONE;
         |                             ^~~~~~~~~~~~~
   drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.c: In function 'mdp_mm_init':
   drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.c:1282:6: warning: unused variable 'ret' [-Wunused-variable]
    1282 |  int ret;
         |      ^~~


vim +1232 drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.c

  1222	
  1223	static int mdp_sub_comps_create(struct mdp_dev *mdp, struct device_node *node)
  1224	{
  1225		struct device *dev = &mdp->pdev->dev;
  1226		struct property *prop;
  1227		const char *name;
  1228		int index = 0;
  1229	
  1230		of_property_for_each_string(node, "mdp3-comps", prop, name) {
  1231			const struct of_device_id *matches = mdp_sub_comp_dt_ids;
> 1232			enum mdp_comp_type type = MDP_COMP_NONE;
  1233			u32 alias_id;
  1234			int id, ret;
  1235			struct mdp_comp *comp;
  1236	
  1237			for (; matches->compatible[0]; matches++) {
  1238				if (of_compat_cmp(name, matches->compatible,
  1239						 strlen(matches->compatible)) == 0) {
  1240					type = (enum mdp_comp_type)matches->data;
  1241					break;
  1242				}
  1243			}
  1244	
  1245			ret = of_property_read_u32_index(node, "mdp3-comp-ids",
  1246							index, &alias_id);
  1247			if (ret) {
  1248				dev_warn(dev, "Skipping unknown component %s\n", name);
  1249				return ret;
  1250			}
  1251	
  1252			id = mdp_comp_get_id(type, alias_id);
  1253			if (id < 0) {
  1254				dev_err(dev, "Failed to get component id: "
  1255					"%s type %d, alias %d\n", name, type, alias_id);
  1256				return -ENODEV;
  1257			}
  1258	
  1259			comp = mdp_comp_create(mdp, node, id);
  1260			if (IS_ERR(comp))
  1261				return PTR_ERR(comp);
  1262	
  1263			index++;
  1264		}
  1265		return 0;
  1266	}
  1267	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org