[linux-next:master 14037/14381] drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_hubp.c:57:6: warning: no previous prototype for 'hubp31_program_extended_blank'

[linux-next:master 14037/14381] drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_hubp.c:57:6: warning: no previous prototype for 'hubp31_program_extended_blank'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   fd4fbb998102ef7812d594121fbabd2b10dced1b
commit: 2336a5c4fd8777bd23d56f95a4c2e3a63d01c0cd [14037/14381] drm/amd/display: Add support for zstate during extended vblank
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220326/202203260132.YGXnD9St-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=2336a5c4fd8777bd23d56f95a4c2e3a63d01c0cd
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 2336a5c4fd8777bd23d56f95a4c2e3a63d01c0cd
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/

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/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_hubp.c:57:6: warning: no previous prototype for 'hubp31_program_extended_blank' [-Wmissing-prototypes]
      57 | void hubp31_program_extended_blank(struct hubp *hubp, unsigned int min_dst_y_next_start_optimized)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/hubp31_program_extended_blank +57 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn31/dcn31_hubp.c

    56	
  > 57	void hubp31_program_extended_blank(struct hubp *hubp, unsigned int min_dst_y_next_start_optimized)
    58	{
    59		struct dcn20_hubp *hubp2 = TO_DCN20_HUBP(hubp);
    60	
    61		REG_SET(BLANK_OFFSET_1, 0, MIN_DST_Y_NEXT_START, min_dst_y_next_start_optimized);
    62	}
    63	

-- 
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https://01.org/lkp