Hi Sui, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on linus/master v6.6-rc7 next-20231027] [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/Sui-Jingfeng/drm-loongson-Introduce-a-minimal-support-for-Loongson-VBIOS/20231030-034730 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20231029194607.379459-4-suijingfeng%40loongson.cn patch subject: [PATCH 3/8] drm/loongson: Allow attach drm bridge driver by calling lsdc_output_init() config: loongarch-randconfig-002-20231030 (https://download.01.org/0day-ci/archive/20231030/202310300738.zcudNQfj-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231030/202310300738.zcudNQfj-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310300738.zcudNQfj-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/loongson/lsdc_output.c:555:5: warning: no previous prototype for 'lsdc_encoder_init' [-Wmissing-prototypes] 555 | int lsdc_encoder_init(struct drm_device *ddev, | ^~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/loongson/lsdc_output.c:578:5: warning: no previous prototype for 'lsdc_connector_init' [-Wmissing-prototypes] 578 | int lsdc_connector_init(struct drm_device *ddev, | ^~~~~~~~~~~~~~~~~~~ vim +/lsdc_encoder_init +555 drivers/gpu/drm/loongson/lsdc_output.c 554 > 555 int lsdc_encoder_init(struct drm_device *ddev, 556 struct lsdc_output *output, 557 unsigned int pipe) 558 { 559 const struct lsdc_output_desc *descp = output->descp; 560 struct drm_encoder *encoder = &output->encoder; 561 int ret; 562 563 ret = drm_encoder_init(ddev, 564 encoder, 565 descp->encoder_funcs, 566 descp->encoder_type, 567 descp->name); 568 if (ret) 569 return ret; 570 571 encoder->possible_crtcs = BIT(pipe); 572 573 drm_encoder_helper_add(encoder, descp->encoder_helper_funcs); 574 575 return 0; 576 } 577 > 578 int lsdc_connector_init(struct drm_device *ddev, 579 struct lsdc_output *output, 580 struct i2c_adapter *ddc, 581 unsigned int pipe) 582 { 583 const struct lsdc_output_desc *descp = output->descp; 584 struct drm_connector *connector = &output->connector; 585 int ret; 586 587 ret = drm_connector_init_with_ddc(ddev, 588 connector, 589 descp->connector_funcs, 590 descp->connector_type, 591 ddc); 592 if (ret) 593 return ret; 594 595 drm_connector_helper_add(connector, descp->connector_helper_funcs); 596 597 drm_connector_attach_encoder(connector, &output->encoder); 598 599 connector->polled = DRM_CONNECTOR_POLL_CONNECT | 600 DRM_CONNECTOR_POLL_DISCONNECT; 601 602 connector->interlace_allowed = 0; 603 connector->doublescan_allowed = 0; 604 605 drm_info(ddev, "DisplayPipe-%u has %s\n", pipe, descp->name); 606 607 return 0; 608 } 609 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
