linux-kernel - drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:139:6: warning: no previous prototype for 'optc1_set_vupdate

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Date:   Tue, 7 Dec 2021 12:35:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Leo Li <sunpeng.li@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Harry Wentland <Harry.Wentland@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:139:6:
 warning: no previous prototype for 'optc1_set_vupdate_keepout'

Hi Leo,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd8c917a56f20f48748dd43d9ae3caff51d5b987
commit: 9df857f930d6035996d481b4e5bc9ce082990afb drm/amd/display: Move vupdate keepout programming from DCN20 to DCN10
date:   8 months ago
config: i386-buildonly-randconfig-r002-20211205 (https://download.01.org/0day-ci/archive/20211207/202112071212.9wkItxOL-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9df857f930d6035996d481b4e5bc9ce082990afb
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9df857f930d6035996d481b4e5bc9ce082990afb
        # 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@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:139:6: warning: no previous prototype for 'optc1_set_vupdate_keepout' [-Wmissing-prototypes]
     139 | void optc1_set_vupdate_keepout(struct timing_generator *optc,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:879:6: warning: no previous prototype for 'optc1_setup_manual_trigger' [-Wmissing-prototypes]
     879 | void optc1_setup_manual_trigger(struct timing_generator *optc)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:897:6: warning: no previous prototype for 'optc1_program_manual_trigger' [-Wmissing-prototypes]
     897 | void optc1_program_manual_trigger(struct timing_generator *optc)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/optc1_set_vupdate_keepout +139 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c

   133	
   134	/**
   135	 * Vupdate keepout can be set to a window to block the update lock for that pipe from changing.
   136	 * Start offset begins with vstartup and goes for x number of clocks,
   137	 * end offset starts from end of vupdate to x number of clocks.
   138	 */
 > 139	void optc1_set_vupdate_keepout(struct timing_generator *optc,
   140				       struct vupdate_keepout_params *params)
   141	{
   142		struct optc *optc1 = DCN10TG_FROM_TG(optc);
   143	
   144		REG_SET_3(OTG_VUPDATE_KEEPOUT, 0,
   145			  MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_START_OFFSET, params->start_offset,
   146			  MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_END_OFFSET, params->end_offset,
   147			  OTG_MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_EN, params->enable);
   148	}
   149	

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