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