Hi Jouni, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip next-20240215] [cannot apply to drm-intel/for-linux-next-fixes drm/drm-next linus/master v6.8-rc4] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Jouni-H-gander/drm-display-Add-missing-aux-less-alpm-wake-related-bits/20240215-185209 base: git://anongit.freedesktop.org/drm-intel for-linux-next patch link: https://lore.kernel.org/r/20240215104934.2395239-5-jouni.hogander%40intel.com patch subject: [PATCH 4/6] drm/i915/psr: Silence period and lfps half cycle config: i386-buildonly-randconfig-004-20240215 (https://download.01.org/0day-ci/archive/20240216/202402161056.O7eY8Uvv-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240216/202402161056.O7eY8Uvv-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202402161056.O7eY8Uvv-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/i915/display/intel_psr.c:1253:6: warning: variable 'silence_period' is uninitialized when used here [-Wuninitialized] 1253 | silence_period > 256 || silence_period < 0 || | ^~~~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_psr.c:1240:17: note: initialize the variable 'silence_period' to silence this warning 1240 | silence_period, lfps_half_cycle; | ^ | = 0 1 warning generated. vim +/silence_period +1253 drivers/gpu/drm/i915/display/intel_psr.c 1234 1235 static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp, 1236 struct intel_crtc_state *crtc_state) 1237 { 1238 struct drm_i915_private *i915 = dp_to_i915(intel_dp); 1239 int aux_less_wake_time, aux_less_wake_lines, switch_to_active_lines, 1240 silence_period, lfps_half_cycle; 1241 1242 aux_less_wake_time = 1243 _lnl_compute_aux_less_wake_time(crtc_state->port_clock / 1000); 1244 aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 1245 aux_less_wake_time); 1246 1247 switch_to_active_lines = 1248 intel_usecs_to_scanlines( 1249 &crtc_state->hw.adjusted_mode, 1250 _lnl_compute_switch_to_active_time(crtc_state->port_clock / 1000)); 1251 1252 if (aux_less_wake_lines > 32 || switch_to_active_lines > 32 || > 1253 silence_period > 256 || silence_period < 0 || 1254 !_lnl_get_silence_period_and_lfps_half_cycle(intel_dp->link_rate, 1255 &silence_period, 1256 &lfps_half_cycle)) 1257 return false; 1258 1259 if (i915->display.params.psr_safest_params) { 1260 aux_less_wake_lines = 32; 1261 switch_to_active_lines = 32; 1262 } 1263 1264 intel_dp->psr.alpm_parameters.aux_less_wake_lines = aux_less_wake_lines; 1265 intel_dp->psr.alpm_parameters.switch_to_active_lines = switch_to_active_lines; 1266 intel_dp->psr.alpm_parameters.silence_period_sym_clocks = silence_period; 1267 intel_dp->psr.alpm_parameters.lfps_half_cycle_num_of_syms = lfps_half_cycle; 1268 1269 return true; 1270 } 1271 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
