Re: [PATCH v4 02/34] drm/mediatek: mtk_dpi: Add support for Pattern Generator in debugfs

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

Hi AngeloGioacchino,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.13-rc6 next-20250109]
[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/AngeloGioacchino-Del-Regno/dt-bindings-display-mediatek-dpi-Add-MT8195-and-MT8188-compat/20250108-193136
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20250108112744.64686-3-angelogioacchino.delregno%40collabora.com
patch subject: [PATCH v4 02/34] drm/mediatek: mtk_dpi: Add support for Pattern Generator in debugfs
config: i386-buildonly-randconfig-003-20250109 (https://download.01.org/0day-ci/archive/20250109/202501092326.5Xw3bp4p-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250109/202501092326.5Xw3bp4p-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/202501092326.5Xw3bp4p-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/mediatek/mtk_dpi.c:22:
   In file included from include/drm/drm_atomic_helper.h:31:
   In file included from include/drm/drm_crtc.h:32:
   In file included from include/drm/drm_modes.h:33:
   In file included from include/drm/drm_connector.h:32:
   In file included from include/drm/drm_util.h:36:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:28:
   In file included from include/linux/ftrace.h:13:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2223:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/gpu/drm/mediatek/mtk_dpi.c:175:9: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     175 |                 val = FIELD_PREP(DPI_PAT_SEL, type) | DPI_PAT_EN;
         |                       ^
>> drivers/gpu/drm/mediatek/mtk_dpi.c:794:8: error: call to undeclared function 'FIELD_GET'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     794 |         val = FIELD_GET(DPI_PAT_SEL, val);
         |               ^
   1 warning and 2 errors generated.


vim +/FIELD_PREP +175 drivers/gpu/drm/mediatek/mtk_dpi.c

   169	
   170	static void mtk_dpi_test_pattern_en(struct mtk_dpi *dpi, u8 type, bool enable)
   171	{
   172		u32 val;
   173	
   174		if (enable)
 > 175			val = FIELD_PREP(DPI_PAT_SEL, type) | DPI_PAT_EN;
   176		else
   177			val = 0;
   178	
   179		mtk_dpi_mask(dpi, DPI_PATTERN0, val, DPI_PAT_SEL | DPI_PAT_EN);
   180	}
   181	

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