[linux-cip:linux-4.19.y-cip 11/17] include/drm/drm_of.h:95:5: warning: no previous prototype for 'drm_of_lvds_get_dual_link_pixel_order'

[linux-cip:linux-4.19.y-cip 11/17] include/drm/drm_of.h:95:5: warning: no previous prototype for 'drm_of_lvds_get_dual_link_pixel_order'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git linux-4.19.y-cip
head:   72750517bc5f1718ce3cb3fa75d4cadc05d27eee
commit: cf532369d40146ffdd35f9d9a4558237c8773846 [11/17] drm: of: Add drm_of_lvds_get_dual_link_pixel_order
config: parisc-randconfig-r001-20200809 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
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
        git checkout cf532369d40146ffdd35f9d9a4558237c8773846
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 

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

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/i2c/tda998x_drv.c:31:
>> include/drm/drm_of.h:95:5: warning: no previous prototype for 'drm_of_lvds_get_dual_link_pixel_order' [-Wmissing-prototypes]
      95 | int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/i2c/tda998x_drv.c:1050:5: warning: no previous prototype for 'tda998x_audio_digital_mute' [-Wmissing-prototypes]
    1050 | int tda998x_audio_digital_mute(struct device *dev, void *data, bool enable)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/drm_of_lvds_get_dual_link_pixel_order +95 include/drm/drm_of.h

    94	
  > 95	int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
    96						  const struct device_node *port2)
    97	{
    98		return -EINVAL;
    99	}
   100	#endif
   101	

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

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