Re: [PATCH v2 1/5] media: cadence: csi2rx: Support runtime PM

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

Hi Changhuang,

kernel test robot noticed the following build warnings:

[auto build test WARNING on media-tree/master]
[also build test WARNING on linuxtv-media-stage/master staging/staging-testing staging/staging-next staging/staging-linus linus/master v6.10 next-20240718]
[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/Changhuang-Liang/media-cadence-csi2rx-Support-runtime-PM/20240718-131216
base:   git://linuxtv.org/media_tree.git master
patch link:    https://lore.kernel.org/r/20240718032834.53876-2-changhuang.liang%40starfivetech.com
patch subject: [PATCH v2 1/5] media: cadence: csi2rx: Support runtime PM
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20240718/202407182235.kxDoVX8T-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240718/202407182235.kxDoVX8T-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/202407182235.kxDoVX8T-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/cadence/cdns-csi2rx.c:739:12: warning: 'csi2rx_runtime_resume' defined but not used [-Wunused-function]
     739 | static int csi2rx_runtime_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~
>> drivers/media/platform/cadence/cdns-csi2rx.c:720:12: warning: 'csi2rx_runtime_suspend' defined but not used [-Wunused-function]
     720 | static int csi2rx_runtime_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~


vim +/csi2rx_runtime_resume +739 drivers/media/platform/cadence/cdns-csi2rx.c

   719	
 > 720	static int csi2rx_runtime_suspend(struct device *dev)
   721	{
   722		struct csi2rx_priv *csi2rx = dev_get_drvdata(dev);
   723		unsigned int i;
   724	
   725		reset_control_assert(csi2rx->sys_rst);
   726		clk_disable_unprepare(csi2rx->sys_clk);
   727	
   728		for (i = 0; i < csi2rx->max_streams; i++) {
   729			reset_control_assert(csi2rx->pixel_rst[i]);
   730			clk_disable_unprepare(csi2rx->pixel_clk[i]);
   731		}
   732	
   733		reset_control_assert(csi2rx->p_rst);
   734		clk_disable_unprepare(csi2rx->p_clk);
   735	
   736		return 0;
   737	}
   738	
 > 739	static int csi2rx_runtime_resume(struct device *dev)
   740	{
   741		struct csi2rx_priv *csi2rx = dev_get_drvdata(dev);
   742		unsigned int i;
   743		int ret;
   744	
   745		ret = clk_prepare_enable(csi2rx->p_clk);
   746		if (ret)
   747			return ret;
   748	
   749		reset_control_deassert(csi2rx->p_rst);
   750	
   751		for (i = 0; i < csi2rx->max_streams; i++) {
   752			ret = clk_prepare_enable(csi2rx->pixel_clk[i]);
   753			if (ret)
   754				goto err_disable_pixclk;
   755	
   756			reset_control_deassert(csi2rx->pixel_rst[i]);
   757		}
   758	
   759		ret = clk_prepare_enable(csi2rx->sys_clk);
   760		if (ret)
   761			goto err_disable_pixclk;
   762	
   763		reset_control_deassert(csi2rx->sys_rst);
   764	
   765		return ret;
   766	
   767	err_disable_pixclk:
   768		for (; i > 0; i--) {
   769			reset_control_assert(csi2rx->pixel_rst[i - 1]);
   770			clk_disable_unprepare(csi2rx->pixel_clk[i - 1]);
   771		}
   772	
   773		reset_control_assert(csi2rx->p_rst);
   774		clk_disable_unprepare(csi2rx->p_clk);
   775	
   776		return ret;
   777	}
   778	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki