Re: [PATCH] drm/omap: switch to drm_of_find_panel_or_bridge

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

Hi "José,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v5.17-rc5 next-20220217]
[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/Jos-Exp-sito/drm-omap-switch-to-drm_of_find_panel_or_bridge/20220221-035403
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20220222/202202220451.VbtgFzSa-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
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
        # https://github.com/0day-ci/linux/commit/9a465e2c1dba123efe08cf2f4a5ae11b07be4142
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jos-Exp-sito/drm-omap-switch-to-drm_of_find_panel_or_bridge/20220221-035403
        git checkout 9a465e2c1dba123efe08cf2f4a5ae11b07be4142
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash

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 >>):

   drivers/gpu/drm/omapdrm/dss/output.c: In function 'omapdss_device_init_output':
>> drivers/gpu/drm/omapdrm/dss/output.c:25:15: error: implicit declaration of function 'drm_of_find_panel_or_bridge' [-Werror=implicit-function-declaration]
      25 |         ret = drm_of_find_panel_or_bridge(out->dev->of_node, out->of_port, 0,
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/drm_of_find_panel_or_bridge +25 drivers/gpu/drm/omapdrm/dss/output.c

    19	
    20	int omapdss_device_init_output(struct omap_dss_device *out,
    21				       struct drm_bridge *local_bridge)
    22	{
    23		int ret;
    24	
  > 25		ret = drm_of_find_panel_or_bridge(out->dev->of_node, out->of_port, 0,
    26						  &out->panel, &out->bridge);
    27		if (ret) {
    28			if (ret == -ENODEV) {
    29				dev_dbg(out->dev, "failed to find video sink\n");
    30				return 0;
    31			}
    32			goto error;
    33		}
    34	
    35		if (out->panel) {
    36			struct drm_bridge *bridge;
    37	
    38			bridge = drm_panel_bridge_add(out->panel);
    39			if (IS_ERR(bridge)) {
    40				dev_err(out->dev,
    41					"unable to create panel bridge (%ld)\n",
    42					PTR_ERR(bridge));
    43				ret = PTR_ERR(bridge);
    44				goto error;
    45			}
    46	
    47			out->bridge = bridge;
    48		}
    49	
    50		if (local_bridge) {
    51			if (!out->bridge) {
    52				ret = -EPROBE_DEFER;
    53				goto error;
    54			}
    55	
    56			out->next_bridge = out->bridge;
    57			out->bridge = local_bridge;
    58		}
    59	
    60		if (!out->bridge) {
    61			ret = -EPROBE_DEFER;
    62			goto error;
    63		}
    64	
    65		return 0;
    66	
    67	error:
    68		omapdss_device_cleanup_output(out);
    69		return ret;
    70	}
    71	

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