* Re: [PATCH 1/4] drm/i915/psr: Add helper for checking if vblank evasion is needed by PSR
[not found] <20251125063253.328023-2-jouni.hogander@intel.com>
@ 2025-11-26 13:32 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-11-26 13:32 UTC (permalink / raw)
To: Jouni Högander, intel-gfx, intel-xe
Cc: llvm, oe-kbuild-all, Jouni Högander
Hi Jouni,
kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20251124]
[cannot apply to drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip v6.18-rc7 v6.18-rc6 v6.18-rc5 linus/master v6.18-rc7]
[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-i915-psr-Add-helper-for-checking-if-vblank-evasion-is-needed-by-PSR/20251125-143352
base: next-20251124
patch link: https://lore.kernel.org/r/20251125063253.328023-2-jouni.hogander%40intel.com
patch subject: [PATCH 1/4] drm/i915/psr: Add helper for checking if vblank evasion is needed by PSR
config: x86_64-randconfig-003-20251126 (https://download.01.org/0day-ci/archive/20251126/202511262156.H5YJpnc5-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/20251126/202511262156.H5YJpnc5-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/202511262156.H5YJpnc5-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/i915/display/intel_psr.c:4550:2: warning: variable 'intel_dp' is used uninitialized whenever 'for' loop exits because its condition is false [-Wsometimes-uninitialized]
4550 | for_each_intel_encoder_mask_with_psr(display->drm, encoder,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4551 | crtc_state->uapi.encoder_mask) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_display.h:271:2: note: expanded from macro 'for_each_intel_encoder_mask_with_psr'
271 | list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:783:7: note: expanded from macro 'list_for_each_entry'
783 | !list_entry_is_head(pos, head, member); \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_psr.c:4556:9: note: uninitialized use occurs here
4556 | return intel_dp->psr.psr2_sel_fetch_enabled;
| ^~~~~~~~
drivers/gpu/drm/i915/display/intel_psr.c:4550:2: note: remove the condition if it is always true
4550 | for_each_intel_encoder_mask_with_psr(display->drm, encoder,
| ^
drivers/gpu/drm/i915/display/intel_display.h:271:2: note: expanded from macro 'for_each_intel_encoder_mask_with_psr'
271 | list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
| ^
include/linux/list.h:783:7: note: expanded from macro 'list_for_each_entry'
783 | !list_entry_is_head(pos, head, member); \
| ^
drivers/gpu/drm/i915/display/intel_psr.c:4548:27: note: initialize the variable 'intel_dp' to silence this warning
4548 | struct intel_dp *intel_dp;
| ^
| = NULL
1 warning generated.
vim +4550 drivers/gpu/drm/i915/display/intel_psr.c
4543
4544 bool intel_psr_needs_evasion(const struct intel_crtc_state *crtc_state)
4545 {
4546 struct intel_display *display = to_intel_display(crtc_state);
4547 struct intel_encoder *encoder;
4548 struct intel_dp *intel_dp;
4549
> 4550 for_each_intel_encoder_mask_with_psr(display->drm, encoder,
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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