[PATCH 1/2] ASoC: add ES8156 codec driver

[kernel test robot]

Hi Shumin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on broonie-sound/for-next]
[also build test WARNING on v5.16-rc4 next-20211208]
[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/Shumin-Chen/This-patches-provide-ASoc-codec-support-for-ES8156/20211210-231527
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
config: x86_64-buildonly-randconfig-r003-20211210 (https://download.01.org/0day-ci/archive/20211211/202112110101.i4FDNZ9c-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/4ea33be548d361d7097073473fb018e016091622
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shumin-Chen/This-patches-provide-ASoc-codec-support-for-ES8156/20211210-231527
        git checkout 4ea33be548d361d7097073473fb018e016091622
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash sound/soc/codecs/

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

All warnings (new ones prefixed by >>):

>> sound/soc/codecs/es8156.c:402:5: warning: no previous prototype for 'es8156_headset_detect' [-Wmissing-prototypes]
     402 | int es8156_headset_detect(int jack_insert)
         |     ^~~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/es8156.c:421:13: warning: 'hp_work' defined but not used [-Wunused-function]
     421 | static void hp_work(struct work_struct *work)
         |             ^~~~~~~
   sound/soc/codecs/es8156.c:386:20: warning: 'es8156_irq_handler' defined but not used [-Wunused-function]
     386 | static irqreturn_t es8156_irq_handler(int irq, void *data)
         |                    ^~~~~~~~~~~~~~~~~~


vim +/es8156_headset_detect +402 sound/soc/codecs/es8156.c

   395	
   396	/*
   397	 * Call from rk_headset_irq_hook_adc.c
   398	 *
   399	 * Enable micbias for HOOK detection and disable external Amplifier
   400	 * when jack insertion.
   401	 */
 > 402	int es8156_headset_detect(int jack_insert)
   403	{
   404		struct es8156_priv *es8156;
   405	
   406		if (!es8156_codec)
   407			return -1;
   408	
   409		es8156 = snd_soc_component_get_drvdata(es8156_codec);
   410	
   411		es8156->hp_inserted = jack_insert;
   412	
   413		/* enable micbias and disable PA */
   414		if (jack_insert)
   415			es8156_enable_spk(es8156, false);
   416	
   417		return 0;
   418	}
   419	EXPORT_SYMBOL(es8156_headset_detect);
   420	

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