drivers/gpu/drm/i915/display/intel_bios.c:3899:20: warning: variable 'vspeo' is uninitialized when used here

drivers/gpu/drm/i915/display/intel_bios.c:3899:20: warning: variable 'vspeo' is uninitialized when used here

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/Micha-Grzelak/drm-i915-bios-search-for-VBT-57-by-default/20260609-035533
head:   37e5f3711f75121bd6a54baa6a92299c51fc313c
commit: 703adad1fcf91efe93f2e1bf885dd23d33cc642c drm/i915: override Snps's VS/PE when requested
date:   3 days ago
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260611/202606111734.HRShsb0i-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project f43d6834093b19baf79beda8c0337ab020ac5f17)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260611/202606111734.HRShsb0i-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/202606111734.HRShsb0i-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/display/intel_bios.c:3899:20: warning: variable 'vspeo' is uninitialized when used here [-Wuninitialized]
    3899 |         entries = (void *)vspeo->entries;
         |                           ^~~~~
   drivers/gpu/drm/i915/display/intel_bios.c:3891:35: note: initialize the variable 'vspeo' to silence this warning
    3891 |         struct intel_ddi_buf_trans *vspeo;
         |                                          ^
         |                                           = NULL
   1 warning generated.


vim +/vspeo +3899 drivers/gpu/drm/i915/display/intel_bios.c

  3883	
  3884	const struct intel_ddi_buf_trans *
  3885	intel_bios_get_c20_vspeo(const struct intel_bios_encoder_data *devdata,
  3886				 bool has_dp, bool is_uhbr)
  3887	{
  3888		struct intel_display *display;
  3889		union intel_ddi_buf_trans_entry *entries;
  3890		int num_columns, num_rows, level, idx;
  3891		struct intel_ddi_buf_trans *vspeo;
  3892		const u32 *tables;
  3893		size_t offset = 0;
  3894	
  3895		if (!validate_vspeo(devdata, has_dp))
  3896			return NULL;
  3897	
  3898		display = devdata->display;
> 3899		entries = (void *)vspeo->entries;
  3900		tables = display->vbt.vspeo.tables;
  3901		num_columns = display->vbt.vspeo.num_columns;
  3902		num_rows = display->vbt.vspeo.num_rows;
  3903		idx = is_uhbr ? 5 : 4;
  3904	
  3905		offset += idx * num_rows * num_columns;
  3906	
  3907		for (level = 0; level < num_rows; level++) {
  3908			u32 vswing = tables[offset];
  3909			u32 pre_cursor = tables[offset + 1];
  3910			u32 post_cursor = tables[offset + 2];
  3911	
  3912			entries[level].snps.vswing = vswing;
  3913			entries[level].snps.pre_cursor = pre_cursor;
  3914			entries[level].snps.post_cursor = post_cursor;
  3915	
  3916			offset += num_columns;
  3917		}
  3918	
  3919		return vspeo;
  3920	}
  3921	

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