linux-kernel - Re: [PATCH v9 04/10] drm/hdcp: Expand HDCP helper library for enable/disable/check

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Date:   Wed, 12 Apr 2023 07:19:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mark Yacoub <markyacoub@...omium.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     oe-kbuild-all@...ts.linux.dev, seanpaul@...omium.org,
        suraj.kandpal@...el.com, dianders@...omium.org,
        dmitry.baryshkov@...aro.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        Jani Nikula <jani.nikula@...el.com>,
        Mark Yacoub <markyacoub@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 04/10] drm/hdcp: Expand HDCP helper library for
 enable/disable/check

Hi Mark,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-intel/for-linux-next-fixes]
[also build test WARNING on drm/drm-next linus/master v6.3-rc6 next-20230411]
[cannot apply to drm-tip/drm-tip drm-misc/drm-misc-next drm-intel/for-linux-next]
[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/Mark-Yacoub/drm-hdcp-Add-drm_hdcp_atomic_check/20230412-032412
base:   git://anongit.freedesktop.org/drm-intel for-linux-next-fixes
patch link:    https://lore.kernel.org/r/20230411192134.508113-5-markyacoub%40google.com
patch subject: [PATCH v9 04/10] drm/hdcp: Expand HDCP helper library for enable/disable/check
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230412/202304120709.oF7BKZuf-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/972a98f65fb56b3be4370593c2b81f1283750db7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Mark-Yacoub/drm-hdcp-Add-drm_hdcp_atomic_check/20230412-032412
        git checkout 972a98f65fb56b3be4370593c2b81f1283750db7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/gpu/drm/display/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304120709.oF7BKZuf-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/display/drm_hdcp_helper.c:675:5: warning: no previous prototype for 'drm_hdcp_helper_hdcp1_capable_dp' [-Wmissing-prototypes]
     675 | int drm_hdcp_helper_hdcp1_capable_dp(struct drm_hdcp_helper_data *data,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/display/drm_hdcp_helper.c:1325:5: warning: no previous prototype for 'drm_hdcp_hdcp1_check_link_registers_dp' [-Wmissing-prototypes]
    1325 | int drm_hdcp_hdcp1_check_link_registers_dp(struct drm_device *dev,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/drm_hdcp_helper_hdcp1_capable_dp +675 drivers/gpu/drm/display/drm_hdcp_helper.c

   674	
 > 675	int drm_hdcp_helper_hdcp1_capable_dp(struct drm_hdcp_helper_data *data,
   676					     bool *capable)
   677	{
   678		int ret;
   679		u8 bcaps;
   680	
   681		ret = data->display_type_funcs->remote_read(
   682			data, data->hdcp1_lut->bcaps, &bcaps, 1);
   683		*capable = !ret && (bcaps & DP_BCAPS_HDCP_CAPABLE);
   684	
   685		return 0;
   686	}
   687	

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