[agd5f:drm-next 12/67] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:138:22: warning: variable 'feature_support' set but not used

[agd5f:drm-next 12/67] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:138:22: warning: variable 'feature_support' set but not used

[kernel test robot]

tree:   https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head:   86b20703e4c5a3c39891def0a68e7438aeca9db9
commit: b8fe56375f78835db47565d91ea9d21767fe3c08 [12/67] drm/amd/display: Refactor ABM feature
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230419/202304190746.ViVd2eR5-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 12.1.0
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
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f drm-next
        git checkout b8fe56375f78835db47565d91ea9d21767fe3c08
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/ drivers/gpu/drm/amd/display/dc/

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/202304190746.ViVd2eR5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c: In function 'dmub_abm_set_event_ex':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:138:22: warning: variable 'feature_support' set but not used [-Wunused-but-set-variable]
     138 |         unsigned int feature_support;
         |                      ^~~~~~~~~~~~~~~
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:83:6: warning: no previous prototype for 'dmub_abm_init' [-Wmissing-prototypes]
      83 | void dmub_abm_init(struct abm *abm, uint32_t backlight)
         |      ^~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:124:14: warning: no previous prototype for 'dmub_abm_get_current_backlight' [-Wmissing-prototypes]
     124 | unsigned int dmub_abm_get_current_backlight(struct abm *abm)
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:135:14: warning: no previous prototype for 'dmub_abm_get_target_backlight' [-Wmissing-prototypes]
     135 | unsigned int dmub_abm_get_target_backlight(struct abm *abm)
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:146:6: warning: no previous prototype for 'dmub_abm_set_level' [-Wmissing-prototypes]
     146 | bool dmub_abm_set_level(struct abm *abm, uint32_t level, uint8_t panel_mask)
         |      ^~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:167:6: warning: no previous prototype for 'dmub_abm_set_ambient_level' [-Wmissing-prototypes]
     167 | void dmub_abm_set_ambient_level(struct abm *abm, unsigned int ambient_lux, uint8_t panel_mask)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:189:6: warning: no previous prototype for 'dmub_abm_init_config' [-Wmissing-prototypes]
     189 | void dmub_abm_init_config(struct abm *abm,
         |      ^~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:221:6: warning: no previous prototype for 'dmub_abm_set_pause' [-Wmissing-prototypes]
     221 | bool dmub_abm_set_pause(struct abm *abm, bool pause, unsigned int panel_inst, unsigned int stream_inst)
         |      ^~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:241:6: warning: no previous prototype for 'dmub_abm_set_pipe' [-Wmissing-prototypes]
     241 | bool dmub_abm_set_pipe(struct abm *abm, uint32_t otg_inst, uint32_t option, uint32_t panel_inst)
         |      ^~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm_lcd.c:263:6: warning: no previous prototype for 'dmub_abm_set_backlight_level' [-Wmissing-prototypes]
     263 | bool dmub_abm_set_backlight_level(struct abm *abm,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/feature_support +138 drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c

   133	
   134	static bool dmub_abm_set_event_ex(struct abm *abm, unsigned int full_screen, unsigned int video_mode,
   135			unsigned int hdr_mode, unsigned int panel_inst)
   136	{
   137		bool ret = false;
 > 138		unsigned int feature_support;
   139	
   140		feature_support = abm_feature_support(abm, panel_inst);
   141	
   142		return ret;
   143	}
   144	

-- 
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https://github.com/intel/lkp-tests