tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: d2c5af89e80c5b71f1da59879464a930947306a2 commit: 2b06044daf23bebbc3e61d430dea24bb1779d0b8 [91/132] drm/panel: Add Feixin K101 IM2BA02 panel config: arm-randconfig-r023-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 436c6c9c20cc522c92a923440a5fc509c342a7db) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.4 git checkout 2b06044daf23bebbc3e61d430dea24bb1779d0b8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): .get_modes = k101_im2ba02_get_modes, ^~~~~~~~~~~~~~~~~~~~~~ drm_panel_init(&ctx->panel, &dsi->dev, &k101_im2ba02_funcs, ~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/drm/drm_panel.h:150:6: note: 'drm_panel_init' declared here void drm_panel_init(struct drm_panel *panel); ^ ret = drm_panel_of_backlight(&ctx->panel); ^ 3 errors generated. vim +442 drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c 436 437 static const struct drm_panel_funcs k101_im2ba02_funcs = { 438 .disable = k101_im2ba02_disable, 439 .unprepare = k101_im2ba02_unprepare, 440 .prepare = k101_im2ba02_prepare, 441 .enable = k101_im2ba02_enable, 443 }; 444 445 static int k101_im2ba02_dsi_probe(struct mipi_dsi_device *dsi) 446 { 447 struct k101_im2ba02 *ctx; 448 unsigned int i; 449 int ret; 450 451 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); 452 if (!ctx) 453 return -ENOMEM; 454 455 mipi_dsi_set_drvdata(dsi, ctx); 456 ctx->dsi = dsi; 457 458 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) 459 ctx->supplies[i].supply = regulator_names[i]; 460 461 ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies), 462 ctx->supplies); 463 if (ret < 0) { 464 DRM_DEV_ERROR(&dsi->dev, "Couldn't get regulators\n"); 465 return ret; 466 } 467 468 ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); 469 if (IS_ERR(ctx->reset)) { 470 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n"); 471 return PTR_ERR(ctx->reset); 472 } 473 475 DRM_MODE_CONNECTOR_DSI); 476 478 if (ret) 479 return ret; 480 481 ret = drm_panel_add(&ctx->panel); 482 if (ret < 0) 483 return ret; 484 485 dsi->mode_flags = MIPI_DSI_MODE_VIDEO; 486 dsi->format = MIPI_DSI_FMT_RGB888; 487 dsi->lanes = 4; 488 489 ret = mipi_dsi_attach(dsi); 490 if (ret < 0) { 491 drm_panel_remove(&ctx->panel); 492 return ret; 493 } 494 495 return 0; 496 } 497 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org