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Message-ID: <202109280712.dkPcPEp3-lkp@intel.com>
Date:   Tue, 28 Sep 2021 07:37:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alex Deucher <alexander.deucher@....com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Luben Tuikov <luben.tuikov@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_clock_source.c:1113:25:
 warning: variable 'clk_src' set but not used

Hi Alex,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   92477dd1faa650e50bd3bb35a6c0b8d09198cc35
commit: 20f2ffe504728612d7b0c34e4f8280e34251e704 drm/amdgpu: fold CONFIG_DRM_AMD_DC_DCN3* into CONFIG_DRM_AMD_DC_DCN (v3)
date:   11 months ago
config: i386-randconfig-a015-20210927 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=20f2ffe504728612d7b0c34e4f8280e34251e704
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 20f2ffe504728612d7b0c34e4f8280e34251e704
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 

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/clk_mgr/dcn301/vg_clk_mgr.c:96:6: warning: no previous prototype for function 'vg_update_clocks' [-Wmissing-prototypes]
   void vg_update_clocks(struct clk_mgr *clk_mgr_base,
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/vg_clk_mgr.c:96:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void vg_update_clocks(struct clk_mgr *clk_mgr_base,
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/vg_clk_mgr.c:375:6: warning: no previous prototype for function 'vg_get_clk_states' [-Wmissing-prototypes]
   void vg_get_clk_states(struct clk_mgr *clk_mgr_base, struct clk_states *s)
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/vg_clk_mgr.c:375:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void vg_get_clk_states(struct clk_mgr *clk_mgr_base, struct clk_states *s)
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/vg_clk_mgr.c:393:6: warning: no previous prototype for function 'vg_init_clocks' [-Wmissing-prototypes]
   void vg_init_clocks(struct clk_mgr *clk_mgr)
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/vg_clk_mgr.c:393:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void vg_init_clocks(struct clk_mgr *clk_mgr)
   ^
   static 
   3 warnings generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/dcn301_smu.c:91:5: warning: no previous prototype for function 'dcn301_smu_send_msg_with_param' [-Wmissing-prototypes]
   int dcn301_smu_send_msg_with_param(
       ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn301/dcn301_smu.c:91:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int dcn301_smu_send_msg_with_param(
   ^
   static 
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_clock_source.c:1113:25: warning: variable 'clk_src' set but not used [-Wunused-but-set-variable]
           struct dce110_clk_src *clk_src;
                                  ^
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/irq/dcn30/irq_service_dcn30.c:50:20: warning: no previous prototype for function 'to_dal_irq_source_dcn30' [-Wmissing-prototypes]
   enum dc_irq_source to_dal_irq_source_dcn30(
                      ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/irq/dcn30/irq_service_dcn30.c:50:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   enum dc_irq_source to_dal_irq_source_dcn30(
   ^
   static 
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn30/display_mode_vba_30.c:3052:10: warning: variable 'MaxUsedBW' set but not used [-Wunused-but-set-variable]
                   double MaxUsedBW = 0;
                          ^
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_init.c:139:6: warning: no previous prototype for function 'dcn30_hw_sequencer_construct' [-Wmissing-prototypes]
   void dcn30_hw_sequencer_construct(struct dc *dc)
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_init.c:139:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void dcn30_hw_sequencer_construct(struct dc *dc)
   ^
   static 
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:44:6: warning: no previous prototype for function 'dpp30_read_state' [-Wmissing-prototypes]
   void dpp30_read_state(struct dpp *dpp_base,
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:44:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void dpp30_read_state(struct dpp *dpp_base,
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:375:6: warning: no previous prototype for function 'dpp3_get_optimal_number_of_taps' [-Wmissing-prototypes]
   bool dpp3_get_optimal_number_of_taps(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:375:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool dpp3_get_optimal_number_of_taps(
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:483:6: warning: no previous prototype for function 'dpp3_cnv_set_bias_scale' [-Wmissing-prototypes]
   void dpp3_cnv_set_bias_scale(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:483:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void dpp3_cnv_set_bias_scale(
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:669:6: warning: no previous prototype for function 'dpp3_program_blnd_lut' [-Wmissing-prototypes]
   bool dpp3_program_blnd_lut(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:669:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool dpp3_program_blnd_lut(
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:1080:6: warning: no previous prototype for function 'dpp3_program_shaper' [-Wmissing-prototypes]
   bool dpp3_program_shaper(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:1080:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool dpp3_program_shaper(
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:1265:6: warning: no previous prototype for function 'dpp3_program_3dlut' [-Wmissing-prototypes]
   bool dpp3_program_3dlut(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dpp.c:1265:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool dpp3_program_3dlut(
   ^
   static 
   6 warnings generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_hwseq.c:322:27: warning: variable 'optc' set but not used [-Wunused-but-set-variable]
           struct timing_generator *optc;
                                    ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_hwseq.c:654:7: warning: variable 'is_dp' set but not used [-Wunused-but-set-variable]
           bool is_dp;
                ^
   2 warnings generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_mpc.c:1363:5: warning: no previous prototype for function 'mpcc3_release_rmu' [-Wmissing-prototypes]
   int mpcc3_release_rmu(struct mpc *mpc, int mpcc_id)
       ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_mpc.c:1363:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int mpcc3_release_rmu(struct mpc *mpc, int mpcc_id)
   ^
   static 
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_afmt.c:122:11: warning: variable 'speakers' set but not used [-Wunused-but-set-variable]
           uint32_t speakers = 0;
                    ^
   1 warning generated.
--
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dio_stream_encoder.c:53:6: warning: no previous prototype for function 'convert_dc_info_packet_to_128' [-Wmissing-prototypes]
   void convert_dc_info_packet_to_128(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dio_stream_encoder.c:53:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void convert_dc_info_packet_to_128(
   ^
   static 
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dio_stream_encoder.c:487:6: warning: no previous prototype for function 'enc3_stream_encoder_dvi_set_stream_attribute' [-Wmissing-prototypes]
   void enc3_stream_encoder_dvi_set_stream_attribute(
        ^
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_dio_stream_encoder.c:487:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void enc3_stream_encoder_dvi_set_stream_attribute(
   ^
   static 
   2 warnings generated.
..


vim +/clk_src +1113 drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_clock_source.c

4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1106  
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1107  static uint32_t dcn3_get_pix_clk_dividers(
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1108  		struct clock_source *cs,
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1109  		struct pixel_clk_params *pix_clk_params,
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1110  		struct pll_settings *pll_settings)
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1111  {
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1112  	unsigned long long actual_pix_clk_100Hz = pix_clk_params->requested_pix_clk_100hz;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 @1113  	struct dce110_clk_src *clk_src;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1114  
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1115  	clk_src = TO_DCE110_CLK_SRC(cs);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1116  	DC_LOGGER_INIT();
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1117  
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1118  	if (pix_clk_params == NULL || pll_settings == NULL
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1119  			|| pix_clk_params->requested_pix_clk_100hz == 0) {
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1120  		DC_LOG_ERROR(
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1121  			"%s: Invalid parameters!!\n", __func__);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1122  		return -1;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1123  	}
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1124  
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1125  	memset(pll_settings, 0, sizeof(*pll_settings));
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1126  	/* Adjust for HDMI Type A deep color */
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1127  	if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1128  		switch (pix_clk_params->color_depth) {
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1129  		case COLOR_DEPTH_101010:
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1130  			actual_pix_clk_100Hz = (actual_pix_clk_100Hz * 5) >> 2;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1131  			break;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1132  		case COLOR_DEPTH_121212:
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1133  			actual_pix_clk_100Hz = (actual_pix_clk_100Hz * 6) >> 2;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1134  			break;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1135  		case COLOR_DEPTH_161616:
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1136  			actual_pix_clk_100Hz = actual_pix_clk_100Hz * 2;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1137  			break;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1138  		default:
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1139  			break;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1140  		}
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1141  	}
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1142  	pll_settings->actual_pix_clk_100hz = (unsigned int) actual_pix_clk_100Hz;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1143  	pll_settings->adjusted_pix_clk_100hz = (unsigned int) actual_pix_clk_100Hz;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1144  	pll_settings->calculated_pix_clk_100hz = (unsigned int) actual_pix_clk_100Hz;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1145  
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1146  	return 0;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1147  }
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21  1148  

:::::: The code at line 1113 was first introduced by commit
:::::: 4d55b0dd1cdd8535ffd6057f210465575117d807 drm/amd/display: Add DCN3 CLK_MGR

:::::: TO: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>

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

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