[PATCH v3 2/2] drm: bridge: cdns-mhdp8546: Enable HDCP

[kernel test robot]

Hi Parshuram,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.12-rc3 next-20210317]
[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/Parshuram-Thombare/enable-HDCP-in-Cadence-MHDP-bridge-driver/20210318-000928
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: x86_64-randconfig-a016-20210317 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8ef111222a3dd12a9175f69c3bff598c46e8bdf7)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/9c8eb15a5059a553e08304619775dd7af4394eb1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Parshuram-Thombare/enable-HDCP-in-Cadence-MHDP-bridge-driver/20210318-000928
        git checkout 9c8eb15a5059a553e08304619775dd7af4394eb1
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c:502:5: warning: no previous prototype for function 'cdns_mhdp_hdcp_set_lc' [-Wmissing-prototypes]
   int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val)
       ^
   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c:502:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val)
   ^
   static 
>> drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c:516:1: warning: no previous prototype for function 'cdns_mhdp_hdcp_set_public_key_params' [-Wmissing-prototypes]
   cdns_mhdp_hdcp_set_public_key_params(struct cdns_mhdp_device *mhdp,
   ^
   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c:515:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int
   ^
   static 
   2 warnings generated.


vim +/cdns_mhdp_hdcp_set_lc +502 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c

   501	
 > 502	int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val)
   503	{
   504		int ret;
   505	
   506		mutex_lock(&mhdp->mbox_mutex);
   507		ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_GENERAL,
   508						    HDCP_GENERAL_SET_LC_128,
   509						    16, val);
   510		mutex_unlock(&mhdp->mbox_mutex);
   511	
   512		return ret;
   513	}
   514	
   515	int
 > 516	cdns_mhdp_hdcp_set_public_key_params(struct cdns_mhdp_device *mhdp,
   517					     struct cdns_hdcp_tx_public_key_param *val)
   518	{
   519		int ret;
   520	
   521		mutex_lock(&mhdp->mbox_mutex);
   522		ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
   523						    HDCP2X_TX_SET_PUBLIC_KEY_PARAMS,
   524						    sizeof(*val), (u8 *)val);
   525		mutex_unlock(&mhdp->mbox_mutex);
   526	
   527		return ret;
   528	}
   529	

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