[kbuild-all] drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_panel_cntl.c:48:6: warning: no previous prototype for 'dce_panel_cntl_hw_init'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 69119673bd50b176ded34032fadd41530fb5af21 commit: d4caa72e275c1920d38a9541b2e4dcc167733734 drm/amd/display: change from panel to panel cntl date: 8 weeks ago config: ia64-randconfig-r012-20200617 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 checkout d4caa72e275c1920d38a9541b2e4dcc167733734 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): 48 | void dce_panel_cntl_hw_init(struct panel_cntl *panel_cntl) | ^~~~~~~~~~~~~~~~~~~~~~ 53 | bool dce_is_panel_backlight_on(struct panel_cntl *panel_cntl) | ^~~~~~~~~~~~~~~~~~~~~~~~~ 63 | bool dce_is_panel_powered_on(struct panel_cntl *panel_cntl) | ^~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:86, from drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_panel_cntl.c:27: drivers/gpu/drm/amd/amdgpu/../display/dc/inc/hw/dpp.h:50:42: warning: 'dpp_input_csc_matrix' defined but not used [-Wunused-const-variable=] 50 | static const struct dpp_input_csc_matrix dpp_input_csc_matrix[] = { | ^~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:32, from drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_panel_cntl.c:27: drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:124:22: warning: 'DP_DVI_CONVERTER_ID_4' defined but not used [-Wunused-const-variable=] 124 | static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa"; | ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:122:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_3' defined but not used [-Wunused-const-variable=] 122 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA"; | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:120:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_2' defined but not used [-Wunused-const-variable=] 120 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT"; | ^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:33, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:37, from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/reg_helper.h:28, from drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_panel_cntl.c:26: drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=] 76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL }; | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=] 75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL }; | ^~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=] 74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL }; | ^~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=] 73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL }; | ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=] 72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL }; | ^~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=] 67 | static const struct fixed31_32 dc_fixpt_zero = { 0 }; | ^~~~~~~~~~~~~ vim +/dce_panel_cntl_hw_init +48 drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_panel_cntl.c 31 32 #define TO_DCE_PANEL_CNTL(panel_cntl)\ 33 container_of(panel_cntl, struct dce_panel_cntl, base) 34 35 #define CTX \ 36 dce_panel_cntl->base.ctx 37 38 #define DC_LOGGER \ 39 dce_panel_cntl->base.ctx->logger 40 41 #define REG(reg)\ 42 dce_panel_cntl->regs->reg 43 44 #undef FN 45 #define FN(reg_name, field_name) \ 46 dce_panel_cntl->shift->field_name, dce_panel_cntl->mask->field_name 47 49 { 50 51 } 52 54 { 55 struct dce_panel_cntl *dce_panel_cntl = TO_DCE_PANEL_CNTL(panel_cntl); 56 uint32_t value; 57 58 REG_GET(PWRSEQ_CNTL, BLON, &value); 59 60 return value; 61 } 62 64 { 65 struct dce_panel_cntl *dce_panel_cntl = TO_DCE_PANEL_CNTL(panel_cntl); 66 uint32_t pwr_seq_state, dig_on, dig_on_ovrd; 67 68 REG_GET(PWRSEQ_STATE, PWRSEQ_TARGET_STATE_R, &pwr_seq_state); 69 70 REG_GET_2(PWRSEQ_CNTL, DIGON, &dig_on, DIGON_OVRD, &dig_on_ovrd); 71 72 return (pwr_seq_state == 1) || (dig_on == 1 && dig_on_ovrd == 1); 73 } 74 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org