Hi Nikolaus, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip v6.13-rc1 next-20241204] [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/Nikolaus-Voss/drm-bridge-fsl-ldb-fixup-mode-on-freq-mismatch/20241204-115306 base: linus/master patch link: https://lore.kernel.org/r/20241203191111.47B56F7%40mail.steuer-voss.de patch subject: [PATCH v2] drm: bridge: fsl-ldb: fixup mode on freq mismatch config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20241205/202412050521.d87GwldA-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241205/202412050521.d87GwldA-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/202412050521.d87GwldA-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/bridge/fsl-ldb.c:9: In file included from include/linux/module.h:19: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:181: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:2223: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 504 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 505 | item]; | ~~~~ include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 511 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 512 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ 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_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 525 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/bridge/fsl-ldb.c:125:30: warning: omitting the parameter name in a function definition is a C23 extension [-Wc23-extensions] 125 | struct drm_bridge_state *, | ^ drivers/gpu/drm/bridge/fsl-ldb.c:127:33: warning: omitting the parameter name in a function definition is a C23 extension [-Wc23-extensions] 127 | struct drm_connector_state *) | ^ 6 warnings generated. vim +125 drivers/gpu/drm/bridge/fsl-ldb.c 123 124 static int fsl_ldb_atomic_check(struct drm_bridge *bridge, > 125 struct drm_bridge_state *, 126 struct drm_crtc_state *crtc_state, 127 struct drm_connector_state *) 128 { 129 struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge); 130 const struct drm_display_mode *mode = &crtc_state->mode; 131 unsigned long requested_link_freq = 132 fsl_ldb_link_frequency(fsl_ldb, mode->clock); 133 unsigned long freq = clk_round_rate(fsl_ldb->clk, requested_link_freq); 134 135 if (freq != requested_link_freq) { 136 /* 137 * this will lead to flicker and incomplete lines on 138 * the attached display, adjust the CRTC clock 139 * accordingly. 140 */ 141 struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; 142 int pclk = freq / fsl_ldb_link_frequency(fsl_ldb, 1); 143 144 if (adjusted_mode->clock != pclk) { 145 dev_warn(fsl_ldb->dev, "Adjusted pixel clk to match LDB clk (%d kHz -> %d kHz)!\n", 146 adjusted_mode->clock, pclk); 147 148 adjusted_mode->clock = pclk; 149 adjusted_mode->crtc_clock = pclk; 150 } 151 } 152 153 return 0; 154 } 155 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
