[linux-next:master 6300/8400] drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c:173:8: error: call to undeclared function 'devm_regulator_bulk_get_const'; ISO C99 and later do not support implicit function declarations

[linux-next:master 6300/8400] drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c:173:8: error: call to undeclared function 'devm_regulator_bulk_get_const'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   ecc768a84f0b8e631986f9ade3118fa37852fef0
commit: aec8485f226c36eb4eea1d489772cd6f2c40144d [6300/8400] drm/panel: add BOE tv101wum-ll2 panel driver
config: x86_64-randconfig-015-20240903 (https://download.01.org/0day-ci/archive/20240903/202409030542.gKqDuIWa-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240903/202409030542.gKqDuIWa-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/202409030542.gKqDuIWa-lkp@intel.com/

Note: the linux-next/master HEAD ecc768a84f0b8e631986f9ade3118fa37852fef0 builds fine.
      It may have been fixed somewhere.

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c:173:8: error: call to undeclared function 'devm_regulator_bulk_get_const'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     173 |         ret = devm_regulator_bulk_get_const(&dsi->dev,
         |               ^
   1 error generated.


vim +/devm_regulator_bulk_get_const +173 drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c

   162	
   163	static int boe_tv101wum_ll2_probe(struct mipi_dsi_device *dsi)
   164	{
   165		struct device *dev = &dsi->dev;
   166		struct boe_tv101wum_ll2 *ctx;
   167		int ret;
   168	
   169		ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
   170		if (!ctx)
   171			return -ENOMEM;
   172	
 > 173		ret = devm_regulator_bulk_get_const(&dsi->dev,
   174						ARRAY_SIZE(boe_tv101wum_ll2_supplies),
   175						boe_tv101wum_ll2_supplies,
   176						&ctx->supplies);
   177		if (ret < 0)
   178			return ret;
   179	
   180		ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
   181		if (IS_ERR(ctx->reset_gpio))
   182			return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
   183					     "Failed to get reset-gpios\n");
   184	
   185		ctx->dsi = dsi;
   186		mipi_dsi_set_drvdata(dsi, ctx);
   187	
   188		dsi->lanes = 4;
   189		dsi->format = MIPI_DSI_FMT_RGB888;
   190		dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
   191				  MIPI_DSI_MODE_VIDEO_HSE;
   192	
   193		drm_panel_init(&ctx->panel, dev, &boe_tv101wum_ll2_panel_funcs,
   194			       DRM_MODE_CONNECTOR_DSI);
   195		ctx->panel.prepare_prev_first = true;
   196	
   197		ret = drm_panel_of_backlight(&ctx->panel);
   198		if (ret)
   199			return dev_err_probe(dev, ret, "Failed to get backlight\n");
   200	
   201		drm_panel_add(&ctx->panel);
   202	
   203		ret = mipi_dsi_attach(dsi);
   204		if (ret < 0) {
   205			drm_panel_remove(&ctx->panel);
   206			return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
   207		}
   208	
   209		return 0;
   210	}
   211	

-- 
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https://github.com/intel/lkp-tests/wiki