* Re: [PATCH 2/3] drm/i915/bios: Add function to check if edp data override is needed
[not found] <20250725061548.2704697-3-suraj.kandpal@intel.com>
@ 2025-07-26 11:20 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-07-26 11:20 UTC (permalink / raw)
To: Suraj Kandpal, intel-xe, intel-gfx
Cc: llvm, oe-kbuild-all, ankit.k.nautiyal, Suraj Kandpal
Hi Suraj,
kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on linus/master v6.16-rc7 next-20250725]
[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/Suraj-Kandpal/drm-i915-vbt-Add-eDP-Data-Overrride-field-in-VBT/20250725-141824
base: git://anongit.freedesktop.org/drm-intel for-linux-next
patch link: https://lore.kernel.org/r/20250725061548.2704697-3-suraj.kandpal%40intel.com
patch subject: [PATCH 2/3] drm/i915/bios: Add function to check if edp data override is needed
config: i386-buildonly-randconfig-006-20250725 (https://download.01.org/0day-ci/archive/20250726/202507261913.LoCL2yuM-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250726/202507261913.LoCL2yuM-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507261913.LoCL2yuM-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/i915/display/intel_bios.c:2524:2: warning: variable 'val' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
2524 | default:
| ^~~~~~~
drivers/gpu/drm/i915/display/intel_bios.c:2528:34: note: uninitialized use occurs here
2528 | return edp_data_override_mask & val;
| ^~~
drivers/gpu/drm/i915/display/intel_bios.c:2485:9: note: initialize the variable 'val' to silence this warning
2485 | u32 val;
| ^
| = 0
1 warning generated.
vim +/val +2524 drivers/gpu/drm/i915/display/intel_bios.c
2482
2483 static bool parse_bdb_263_edp_data_override(const u32 edp_data_override_mask, int rate)
2484 {
2485 u32 val;
2486
2487 switch (rate) {
2488 case 2000000:
2489 val = BDB_263_VBT_EDP_LINK_RATE_20;
2490 break;
2491 case 1350000:
2492 val = BDB_263_VBT_EDP_LINK_RATE_13_5;
2493 break;
2494 case 1000000:
2495 val = BDB_263_VBT_EDP_LINK_RATE_10;
2496 break;
2497 case 810000:
2498 val = BDB_263_VBT_EDP_LINK_RATE_8_1;
2499 break;
2500 case 675000:
2501 val = BDB_263_VBT_EDP_LINK_RATE_6_75;
2502 break;
2503 case 540000:
2504 val = BDB_263_VBT_EDP_LINK_RATE_5_4;
2505 break;
2506 case 432000:
2507 val = BDB_263_VBT_EDP_LINK_RATE_4_32;
2508 break;
2509 case 324000:
2510 val = BDB_263_VBT_EDP_LINK_RATE_3_24;
2511 break;
2512 case 270000:
2513 val = BDB_263_VBT_EDP_LINK_RATE_2_7;
2514 break;
2515 case 243000:
2516 val = BDB_263_VBT_EDP_LINK_RATE_2_43;
2517 break;
2518 case 216000:
2519 val = BDB_263_VBT_EDP_LINK_RATE_2_16;
2520 break;
2521 case 162000:
2522 val = BDB_263_VBT_EDP_LINK_RATE_1_62;
2523 break;
> 2524 default:
2525 break;
2526 }
2527
2528 return edp_data_override_mask & val;
2529 }
2530
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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