Re: [PATCH v3 1/2] drm: Introduce drm_crtc_vblank_prepare()

[kernel test robot <lkp@intel.com>]

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on daeinki-drm-exynos/exynos-drm-next drm/drm-next drm-tip/drm-tip]
[cannot apply to drm-i915/for-linux-next drm-i915/for-linux-next-fixes linus/master v6.19-rc5]
[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/sunpeng-li-amd-com/drm-amd-display-Implement-prepare_vblank_enable-callback/20260110-032355
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260109192027.116325-1-sunpeng.li%40amd.com
patch subject: [PATCH v3 1/2] drm: Introduce drm_crtc_vblank_prepare()
config: nios2-allmodconfig (https://download.01.org/0day-ci/archive/20260116/202601162107.idPiWG44-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260116/202601162107.idPiWG44-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/202601162107.idPiWG44-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "drm_crtc_vblank_prepare" [drivers/gpu/drm/drm_kms_helper.ko] undefined!

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