[PATCH 2/2] media: nxp: Add i.MX9 CSI pixel formatter v4l2 driver

[kernel test robot]

Hi Guoniu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 1f2353f5a1af995efbf7bea44341aa0d03460b28]

url:    https://github.com/intel-lab-lkp/linux/commits/Guoniu-Zhou/media-dt-bindings-Add-CSI-Pixel-Formatter-DT-bindings/20251203-143208
base:   1f2353f5a1af995efbf7bea44341aa0d03460b28
patch link:    https://lore.kernel.org/r/20251203-csi_formatter-v1-2-eb9e1147b49e%40nxp.com
patch subject: [PATCH 2/2] media: nxp: Add i.MX9 CSI pixel formatter v4l2 driver
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20251204/202512040513.mvgeYlO0-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251204/202512040513.mvgeYlO0-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512040513.mvgeYlO0-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/nxp/imx9-csi-formatter.c:786:12: warning: 'csi_formatter_runtime_resume' defined but not used [-Wunused-function]
     786 | static int csi_formatter_runtime_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/media/platform/nxp/imx9-csi-formatter.c:776:12: warning: 'csi_formatter_runtime_suspend' defined but not used [-Wunused-function]
     776 | static int csi_formatter_runtime_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/platform/nxp/imx9-csi-formatter.c:763:12: warning: 'csi_formatter_system_resume' defined but not used [-Wunused-function]
     763 | static int csi_formatter_system_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/platform/nxp/imx9-csi-formatter.c:758:12: warning: 'csi_formatter_system_suspend' defined but not used [-Wunused-function]
     758 | static int csi_formatter_system_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/csi_formatter_runtime_resume +786 drivers/media/platform/nxp/imx9-csi-formatter.c

   775	
 > 776	static int csi_formatter_runtime_suspend(struct device *dev)
   777	{
   778		struct v4l2_subdev *sd = dev_get_drvdata(dev);
   779		struct csi_formatter *formatter = sd_to_formatter(sd);
   780	
   781		clk_disable_unprepare(formatter->clk);
   782	
   783		return 0;
   784	}
   785	
 > 786	static int csi_formatter_runtime_resume(struct device *dev)
   787	{
   788		struct v4l2_subdev *sd = dev_get_drvdata(dev);
   789		struct csi_formatter *formatter = sd_to_formatter(sd);
   790	
   791		return clk_prepare_enable(formatter->clk);
   792	}
   793	

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