Hi Dave, kernel test robot noticed the following build warnings: [auto build test WARNING on 91e21479c81dd4e9e22a78d7446f92f6b96a7284] url: https://github.com/intel-lab-lkp/linux/commits/Dave-Stevenson/drm-vc4-Limit-max_bpc-to-8-on-Pi0-3/20241024-005239 base: 91e21479c81dd4e9e22a78d7446f92f6b96a7284 patch link: https://lore.kernel.org/r/20241023-drm-vc4-2712-support-v1-2-1cc2d5594907%40raspberrypi.com patch subject: [PATCH 02/37] drm/vc4: Use of_device_get_match_data to set generation config: um-allmodconfig (https://download.01.org/0day-ci/archive/20241025/202410250459.OQAldqVP-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 5886454669c3c9026f7f27eab13509dd0241f2d6) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241025/202410250459.OQAldqVP-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/202410250459.OQAldqVP-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/vc4/vc4_drv.c:27: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:2213: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from drivers/gpu/drm/vc4/vc4_drv.c:27: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/gpu/drm/vc4/vc4_drv.c:27: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/gpu/drm/vc4/vc4_drv.c:27: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 693 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 701 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 709 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 718 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 727 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 736 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> drivers/gpu/drm/vc4/vc4_drv.c:303:8: warning: cast to smaller integer type 'enum vc4_gen' from 'const void *' [-Wvoid-pointer-to-enum-cast] 303 | gen = (enum vc4_gen)of_device_get_match_data(dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 14 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for GET_FREE_REGION Depends on [n]: SPARSEMEM [=n] Selected by [m]: - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m] vim +303 drivers/gpu/drm/vc4/vc4_drv.c 288 289 static int vc4_drm_bind(struct device *dev) 290 { 291 struct platform_device *pdev = to_platform_device(dev); 292 const struct drm_driver *driver; 293 struct rpi_firmware *firmware = NULL; 294 struct drm_device *drm; 295 struct vc4_dev *vc4; 296 struct device_node *node; 297 struct drm_crtc *crtc; 298 enum vc4_gen gen; 299 int ret = 0; 300 301 dev->coherent_dma_mask = DMA_BIT_MASK(32); 302 > 303 gen = (enum vc4_gen)of_device_get_match_data(dev); 304 305 if (gen > VC4_GEN_4) 306 driver = &vc5_drm_driver; 307 else 308 driver = &vc4_drm_driver; 309 310 node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches, 311 NULL); 312 if (node) { 313 ret = of_dma_configure(dev, node, true); 314 of_node_put(node); 315 316 if (ret) 317 return ret; 318 } 319 320 vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base); 321 if (IS_ERR(vc4)) 322 return PTR_ERR(vc4); 323 vc4->gen = gen; 324 vc4->dev = dev; 325 326 drm = &vc4->base; 327 platform_set_drvdata(pdev, drm); 328 329 if (gen == VC4_GEN_4) { 330 ret = drmm_mutex_init(drm, &vc4->bin_bo_lock); 331 if (ret) 332 goto err; 333 334 ret = vc4_bo_cache_init(drm); 335 if (ret) 336 goto err; 337 } 338 339 ret = drmm_mode_config_init(drm); 340 if (ret) 341 goto err; 342 343 if (gen == VC4_GEN_4) { 344 ret = vc4_gem_init(drm); 345 if (ret) 346 goto err; 347 } 348 349 node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware"); 350 if (node) { 351 firmware = rpi_firmware_get(node); 352 of_node_put(node); 353 354 if (!firmware) { 355 ret = -EPROBE_DEFER; 356 goto err; 357 } 358 } 359 360 ret = aperture_remove_all_conflicting_devices(driver->name); 361 if (ret) 362 goto err; 363 364 if (firmware) { 365 ret = rpi_firmware_property(firmware, 366 RPI_FIRMWARE_NOTIFY_DISPLAY_DONE, 367 NULL, 0); 368 if (ret) 369 drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret); 370 371 rpi_firmware_put(firmware); 372 } 373 374 ret = component_bind_all(dev, drm); 375 if (ret) 376 goto err; 377 378 ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4); 379 if (ret) 380 goto err; 381 382 ret = vc4_plane_create_additional_planes(drm); 383 if (ret) 384 goto err; 385 386 ret = vc4_kms_load(drm); 387 if (ret < 0) 388 goto err; 389 390 drm_for_each_crtc(crtc, drm) 391 vc4_crtc_disable_at_boot(crtc); 392 393 ret = drm_dev_register(drm, 0); 394 if (ret < 0) 395 goto err; 396 397 drm_client_setup_with_fourcc(drm, DRM_FORMAT_RGB565); 398 399 return 0; 400 401 err: 402 platform_set_drvdata(pdev, NULL); 403 return ret; 404 } 405 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
