Re: [PATCH] drm/xe: add DG2 HuC GSC support and MEI integration

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

Hi Seliverstov,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-xe/drm-xe-next]
[also build test ERROR on drm-i915/for-linux-next drm-i915/for-linux-next-fixes drm-tip/drm-tip linus/master v7.2-rc6 next-20260731]
[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/Seliverstov-Daniil-Denisovich/drm-xe-add-DG2-HuC-GSC-support-and-MEI-integration/20260803-151027
base:   https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next
patch link:    https://lore.kernel.org/r/20260731120427.864560-1-daniil.seliverstov2003%40gmail.com
patch subject: [PATCH] drm/xe: add DG2 HuC GSC support and MEI integration
config: arm-randconfig-001-20260803 (https://download.01.org/0day-ci/archive/20260803/202608032357.ba3Vit6A-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260803/202608032357.ba3Vit6A-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608032357.ba3Vit6A-lkp@intel.com/

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: drivers/gpu/drm/xe/xe_mei_dg2.o: in function `xe_mei_dg2_auth_huc':
>> drivers/gpu/drm/xe/xe_mei_dg2.c:81: undefined reference to `mei_cldev_enabled'
>> arm-linux-gnueabi-ld: drivers/gpu/drm/xe/xe_mei_dg2.c:95: undefined reference to `mei_cldev_send'
>> arm-linux-gnueabi-ld: drivers/gpu/drm/xe/xe_mei_dg2.c:101: undefined reference to `mei_cldev_recv'
>> arm-linux-gnueabi-ld: drivers/gpu/drm/xe/xe_mei_dg2.c:82: undefined reference to `mei_cldev_enable'


vim +81 drivers/gpu/drm/xe/xe_mei_dg2.c

    58	
    59	int xe_mei_dg2_auth_huc(struct xe_device *xe, struct xe_huc *huc)
    60	{
    61		struct device *cl_dev = NULL;
    62		struct mei_cl_device *cldev;
    63		struct pxp43_start_huc_auth_in in = { 0 };
    64		struct pxp43_huc_auth_out out = { 0 };
    65		ssize_t byte;
    66		int ret;
    67		static int retry_count;
    68	
    69		device_for_each_child(xe->drm.dev, &cl_dev, find_pxp_client_deep);
    70	
    71		if (!cl_dev) {
    72			if (retry_count++ % 5 == 0)
    73				drm_info(&xe->drm,
    74					 "HuC auth: waiting for MEI PXP client (HECI1) to initialize...\n");
    75			return -EAGAIN;
    76		}
    77	
    78		get_device(cl_dev);
    79		cldev = to_mei_cl_device(cl_dev);
    80	
  > 81		if (!mei_cldev_enabled(cldev)) {
  > 82			ret = mei_cldev_enable(cldev);
    83			if (ret) {
    84				put_device(cl_dev);
    85				return -EAGAIN;
    86			}
    87		}
    88	
    89		in.header.api_version = PXP_APIVER(4, 3);
    90		in.header.command_id = PXP43_CMDID_START_HUC_AUTH;
    91		in.header.buffer_len = sizeof(in.huc_base_address);
    92		in.huc_base_address =
    93			cpu_to_le64(xe_bo_main_addr(huc->fw.bo, PAGE_SIZE));
    94	
  > 95		byte = mei_cldev_send(cldev, (u8 *)&in, sizeof(in));
    96		if (byte < 0) {
    97			put_device(cl_dev);
    98			return byte;
    99		}
   100	
 > 101		byte = mei_cldev_recv(cldev, (u8 *)&out, sizeof(out));

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