Hi Kai-Heng,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on sound/for-next]
[also build test ERROR on v5.9 next-20201023]
[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]

url:    https://github.com/0day-ci/linux/commits/Kai-Heng-Feng/ALSA-hda-Refactor-codec-PM-to-use-direct-complete-optimization/20201023-182616
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: x86_64-randconfig-a016-20201023 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 147b9497e79a98a8614b2b5eb4ba653b44f6b6f0)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/8add6f1976839b15db076e618d38e3634e86c0b0
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kai-Heng-Feng/ALSA-hda-Refactor-codec-PM-to-use-direct-complete-optimization/20201023-182616
        git checkout 8add6f1976839b15db076e618d38e3634e86c0b0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> sound/pci/hda/hda_intel.c:1151:13: error: use of undeclared identifier 'azx_prepare'
           .prepare = azx_prepare,
                      ^
   1 error generated.

vim +/azx_prepare +1151 sound/pci/hda/hda_intel.c

  1149	
  1150	static const struct dev_pm_ops azx_pm = {
> 1151		.prepare = azx_prepare,
  1152		SET_SYSTEM_SLEEP_PM_OPS(azx_suspend, azx_resume)
  1153	#ifdef CONFIG_PM_SLEEP
  1154		.freeze_noirq = azx_freeze_noirq,
  1155		.thaw_noirq = azx_thaw_noirq,
  1156	#endif
  1157		SET_RUNTIME_PM_OPS(azx_runtime_suspend, azx_runtime_resume, azx_runtime_idle)
  1158	};
  1159	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org