linux-kernel - Re: [PATCH v8 04/10] drm/hdcp: Expand HDCP helper library for enable/disable/check

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Message-ID: <202304010815.5iVFI5nv-lkp@intel.com>
Date:   Sat, 1 Apr 2023 08:19:50 +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,
        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 v8 04/10] drm/hdcp: Expand HDCP helper library for
 enable/disable/check

Hi Mark,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next-fixes]
[also build test WARNING on drm/drm-next linus/master v6.3-rc4 next-20230331]
[cannot apply to 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/20230401-061425
base:   git://anongit.freedesktop.org/drm-intel for-linux-next-fixes
patch link:    https://lore.kernel.org/r/20230331221213.1691997-5-markyacoub%40google.com
patch subject: [PATCH v8 04/10] drm/hdcp: Expand HDCP helper library for enable/disable/check
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20230401/202304010815.5iVFI5nv-lkp@intel.com/config)
compiler: riscv64-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/82a092e7e090cdeb3ff18498e6ad671906268631
        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/20230401-061425
        git checkout 82a092e7e090cdeb3ff18498e6ad671906268631
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv 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/202304010815.5iVFI5nv-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/display/drm_hdcp_helper.c:719: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Check if the sink is capable of HDCP 1.x. DisplayPort has a dedicated bit
   drivers/gpu/drm/display/drm_hdcp_helper.c:742: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Check if the sink is capable of HDCP 1.x. HDMI spec states that transmitters
   drivers/gpu/drm/display/drm_hdcp_helper.c:1633: warning: Function parameter or member 'aux' not described in 'drm_hdcp_helper_initialize_dp'


vim +719 drivers/gpu/drm/display/drm_hdcp_helper.c

   717	
   718	/**
 > 719	 * Check if the sink is capable of HDCP 1.x. DisplayPort has a dedicated bit
   720	 * for this in DPCD.
   721	 *
   722	 * @data: pointer to the HDCP helper data.
   723	 * @capable: pointer to a bool which will contain true if the sink is capable.
   724	 *
   725	 * Returns:
   726	 * -errno if the transacation between source and sink fails.
   727	 */
   728	int drm_hdcp_helper_hdcp1_capable_dp(struct drm_hdcp_helper_data *data,
   729					     bool *capable)
   730	{
   731		int ret;
   732		u8 bcaps;
   733	
   734		ret = data->funcs->remote_read(data, data->hdcp1_lut->bcaps, &bcaps, 1);
   735		*capable = !ret && (bcaps & DP_BCAPS_HDCP_CAPABLE);
   736	
   737		return 0;
   738	}
   739	EXPORT_SYMBOL(drm_hdcp_helper_hdcp1_capable_dp);
   740	

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