Hi Dnyaneshwar, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20241209] [also build test WARNING on linus/master v6.13-rc2] [cannot apply to drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip v6.13-rc2 v6.13-rc1 v6.12] [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/Dnyaneshwar-Bhadane/drm-i915-cx0_phy-Update-HDMI-TMDS-C20-algorithm-value/20241209-233928 base: next-20241209 patch link: https://lore.kernel.org/r/20241209153418.49580-1-dnyaneshwar.bhadane%40intel.com patch subject: [PATCH v2] drm/i915/cx0_phy: Update HDMI TMDS C20 algorithm value config: i386-buildonly-randconfig-005-20241210 (https://download.01.org/0day-ci/archive/20241210/202412100658.ach3jkpF-lkp@xxxxxxxxx/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241210/202412100658.ach3jkpF-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/202412100658.ach3jkpF-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/display/intel_cx0_phy.c:13: In file included from drivers/gpu/drm/i915/display/intel_de.h:9: In file included from drivers/gpu/drm/i915/i915_drv.h:40: In file included from drivers/gpu/drm/i915/display/intel_display_core.h:16: In file included from include/drm/drm_connector.h:32: In file included from include/drm/drm_util.h:36: In file included from include/linux/kgdb.h:19: In file included from include/linux/kprobes.h:28: In file included from include/linux/ftrace.h:13: In file included from include/linux/kallsyms.h:13: In file included from include/linux/mm.h:2287: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> drivers/gpu/drm/i915/display/intel_cx0_phy.c:2193:13: warning: variable 'tx_misc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 2193 | } else if (IS_METEORLAKE(to_i915(display->drm))) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/i915_drv.h:528:29: note: expanded from macro 'IS_METEORLAKE' 528 | #define IS_METEORLAKE(i915) IS_PLATFORM(i915, INTEL_METEORLAKE) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2211:26: note: uninitialized use occurs here 2211 | return (C20_PHY_TX_MISC(tx_misc) | | ^~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h:291:73: note: expanded from macro 'C20_PHY_TX_MISC' 291 | #define C20_PHY_TX_MISC(val) REG_FIELD_PREP16(C20_PHY_TX_MISC_MASK, (val)) | ^~~ drivers/gpu/drm/i915/i915_reg_defs.h:188:28: note: expanded from macro 'REG_FIELD_PREP16' 188 | ((u16)((((typeof(__mask))(__val) << __bf_shf(__mask)) & (__mask)) + \ | ^~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2193:9: note: remove the 'if' if its condition is always true 2193 | } else if (IS_METEORLAKE(to_i915(display->drm))) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2182:13: note: initialize the variable 'tx_misc' to silence this warning 2182 | u16 tx_misc; | ^ | = 0 >> drivers/gpu/drm/i915/display/intel_cx0_phy.c:2193:13: warning: variable 'tx_term_ctrl' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 2193 | } else if (IS_METEORLAKE(to_i915(display->drm))) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/i915_drv.h:528:29: note: expanded from macro 'IS_METEORLAKE' 528 | #define IS_METEORLAKE(i915) IS_PLATFORM(i915, INTEL_METEORLAKE) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2213:47: note: uninitialized use occurs here 2213 | C20_PHY_TX_DCC_BYPASS | C20_PHY_TX_TERM_CTL(tx_term_ctrl)); | ^~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h:297:80: note: expanded from macro 'C20_PHY_TX_TERM_CTL' 297 | #define C20_PHY_TX_TERM_CTL(val) REG_FIELD_PREP16(C20_PHY_TX_TERM_CTL_MASK, (val)) | ^~~ drivers/gpu/drm/i915/i915_reg_defs.h:188:28: note: expanded from macro 'REG_FIELD_PREP16' 188 | ((u16)((((typeof(__mask))(__val) << __bf_shf(__mask)) & (__mask)) + \ | ^~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2193:9: note: remove the 'if' if its condition is always true 2193 | } else if (IS_METEORLAKE(to_i915(display->drm))) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/display/intel_cx0_phy.c:2184:18: note: initialize the variable 'tx_term_ctrl' to silence this warning 2184 | u16 tx_term_ctrl; | ^ | = 0 3 warnings generated. vim +2193 drivers/gpu/drm/i915/display/intel_cx0_phy.c 2177 2178 static u16 intel_c20_hdmi_tmds_tx_cgf_1(struct intel_crtc_state *crtc_state) 2179 { 2180 struct intel_display *display = to_intel_display(crtc_state); 2181 struct pci_dev *pdev = NULL; 2182 u16 tx_misc; 2183 u16 tx_dcc_cal_dac_ctrl_range = 8; 2184 u16 tx_term_ctrl; 2185 u16 host_bridge_pci_dev_id; 2186 2187 if (IS_BATTLEMAGE(to_i915(display->drm))) { 2188 tx_misc = 0; 2189 tx_term_ctrl = 2; 2190 } else if (DISPLAY_VER(display) >= 20) { 2191 tx_misc = 5; 2192 tx_term_ctrl = 4; > 2193 } else if (IS_METEORLAKE(to_i915(display->drm))) { 2194 /* 2195 * Some SoCs have the same drm PCI IDs, so differentiate based 2196 * on the host bridge device ID to use the correct txx_mics value. 2197 */ 2198 while ((pdev = pci_get_class(PCI_CLASS_BRIDGE_HOST << 8, pdev))) 2199 host_bridge_pci_dev_id = pdev->device; 2200 2201 if (IS_METEORLAKE_U(to_i915(display->drm)) || 2202 IS_ARROWLAKE_U(to_i915(display->drm)) || 2203 (pdev && IS_ARROWLAKE_S_BY_HOST_BRIDGE_ID(host_bridge_pci_dev_id))) { 2204 tx_misc = 3; 2205 } else { 2206 tx_misc = 7; 2207 } 2208 2209 tx_term_ctrl = 2; 2210 } 2211 return (C20_PHY_TX_MISC(tx_misc) | 2212 C20_PHY_TX_DCC_CAL_RANGE(tx_dcc_cal_dac_ctrl_range) | 2213 C20_PHY_TX_DCC_BYPASS | C20_PHY_TX_TERM_CTL(tx_term_ctrl)); 2214 } 2215 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
