tree: https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git vsp1/v3u head: 15890c07a0b56cea8221557f4c28a2052c1b3d14 commit: 784b157f3c0a73f43f395ab88d8780eaafff6b8e [48/69] v4l: vsp1: Add debugfs system v1.8 config: arc-randconfig-r012-20210518 (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git/commit/... git remote add rcar https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git git fetch --no-tags rcar vsp1/v3u git checkout 784b157f3c0a73f43f395ab88d8780eaafff6b8e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/media/platform/vsp1/vsp1_debugfs.c: In function 'vsp1_debugfs_info': drivers/media/platform/vsp1/vsp1_debugfs.c:371:59: error: 'VI6_WPF0_FRCNT' undeclared (first use in this function) 371 | seq_printf(s, "VI6_WPF0_FRCNT = 0x%08x", vsp1_read(vsp1, VI6_WPF0_FRCNT)); | ^~~~~~~~~~~~~~ drivers/media/platform/vsp1/vsp1_debugfs.c:371:59: note: each undeclared identifier is reported only once for each function it appears in drivers/media/platform/vsp1/vsp1_debugfs.c: In function 'vsp1_debugfs_init': 471 | struct dentry *info_file; | ^~~~~~~~~ At top level: drivers/media/platform/vsp1/vsp1_debugfs.c:311:13: warning: 'vsp1_reg_read_and_decode' defined but not used [-Wunused-function] 311 | static void vsp1_reg_read_and_decode(struct vsp1_device *vsp1, | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/platform/vsp1/vsp1_debugfs.c:281:12: warning: 'vsp1_reg_decode' defined but not used [-Wunused-function] 281 | static int vsp1_reg_decode(struct seq_file *s, u32 offset, u32 value) | ^~~~~~~~~~~~~~~ vim +/info_file +471 drivers/media/platform/vsp1/vsp1_debugfs.c 354 355 static int vsp1_debugfs_info(struct seq_file *s, void *p) 356 { 357 struct vsp1_device *vsp1 = s->private; 358 unsigned int i; 359 u32 status; 360 361 /* Make sure all reads are with 'powered' device */ 362 vsp1_device_get(vsp1); 363 364 seq_printf(s, "name: %s\n", vsp1->info->model ? vsp1->info->model : ""); 365 366 status = vsp1_read(vsp1, VI6_STATUS); 367 seq_printf(s, "VI6_STATUS = 0x%08x : ", status); 368 decode_vi6_status(s, status); 369 seq_puts(s, "\n"); 370 372 373 for (i = 0; i < vsp1->info->wpf_count; ++i) { 374 struct vsp1_rwpf *wpf = vsp1->wpf[i]; 375 u32 status; 376 u32 enable; 377 378 if (wpf == NULL) 379 continue; 380 381 enable = vsp1_read(vsp1, VI6_WPF_IRQ_ENB(i)); 382 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i)); 383 384 seq_printf(s, "VI6_WPF_IRQ_ENB(%d) = ", i); 385 decode_vi6_wpf_enb(s, enable); 386 seq_puts(s, "\n"); 387 388 seq_printf(s, "VI6_WPF_IRQ_STA(%d) = ", i); 389 decode_vi6_wpf_sta(s, status); 390 seq_puts(s, "\n"); 391 392 seq_printf(s, "WPF[%d]->entity->Pipe = %p\n", i, wpf->entity.pipe); 393 /* Report the WPF Pipe information */ 394 vsp1_debugfs_print_vsp1_pipe(s, wpf->entity.pipe, "WPF"); 395 396 status = vsp1_read(vsp1, VI6_DISP_IRQ_STA(i)); 397 seq_printf(s, "VI6_DISP_IRQ_STA(%d) = ", i); 398 decode_vi6_disp_irq_sta(s, status); 399 seq_puts(s, "\n"); 400 } 401 402 for (i = 0; i < vsp1->info->rpf_count; ++i) { 403 struct vsp1_rwpf *rpf = vsp1->rpf[i]; 404 405 if (rpf == NULL) 406 continue; 407 408 seq_printf(s, 409 "RPF[%d]->entity.pipe = %p\n", i, rpf->entity.pipe); 410 411 vsp1_debugfs_print_vsp1_pipe(s, rpf->entity.pipe, "RPF"); 412 413 } 414 415 vsp1_device_put(vsp1); 416 417 return 0; 418 } 419 DEBUGFS_RO_ATTR(vsp1_debugfs_info); 420 421 static int vsp1_debugfs_regs(struct seq_file *s, void *p) 422 { 423 struct vsp1_device *vsp1 = s->private; 424 unsigned int i; 425 u32 status; 426 427 /* Make sure all reads are with 'powered' device */ 428 vsp1_device_get(vsp1); 429 430 for (i = 0; i < ARRAY_SIZE(vsp1_regset); i++) { 431 const struct debugfs_reg32 *reg = &vsp1_regset[i]; 432 433 status = vsp1_read(vsp1, reg->offset); 434 435 seq_printf(s, "0x%08x [%s]\n", status, reg->name); 436 } 437 438 vsp1_device_put(vsp1); 439 440 return 0; 441 } 442 DEBUGFS_RO_ATTR(vsp1_debugfs_regs); 443 444 static int vsp1_debugfs_reset_wpf(struct seq_file *s, void *p) 445 { 446 struct vsp1_device *vsp1 = s->private; 447 int ret; 448 449 /* Make sure all reads are with 'powered' device */ 450 vsp1_device_get(vsp1); 451 452 /* Prints are 'before' and 'after' to preserve timing on output */ 453 seq_puts(s, "Resetting WPF[0] : "); 454 455 ret = vsp1_reset_wpf(vsp1->wpf[0]->entity.vsp1, 456 vsp1->wpf[0]->entity.index); 457 if (ret == 0) 458 seq_puts(s, "Success\n"); 459 else 460 seq_puts(s, "Failed\n"); 461 462 vsp1_device_put(vsp1); 463 464 return 0; 465 } 466 DEBUGFS_RO_ATTR(vsp1_debugfs_reset_wpf); 467 468 /* Debugfs initialised after entities are created */ 469 int vsp1_debugfs_init(struct vsp1_device *vsp1) 470 { 472 473 vsp1->regset.regs = vsp1_regset; 474 vsp1->regset.base = vsp1->mmio; 475 vsp1->regset.nregs = ARRAY_SIZE(vsp1_regset); 476 477 vsp1->dbgroot = debugfs_create_dir(dev_name(vsp1->dev), NULL); 478 if (!vsp1->dbgroot) 479 return -ENOMEM; 480 481 /* dentry pointer discarded */ 482 info_file = debugfs_create_file("info", 0444, 483 vsp1->dbgroot, 484 vsp1, 485 &vsp1_debugfs_info_fops); 486 487 /* dentry pointer discarded */ 488 info_file = debugfs_create_file("regs_local", 0444, 489 vsp1->dbgroot, 490 vsp1, 491 &vsp1_debugfs_regs_fops); 492 493 /* dentry pointer discarded */ 494 info_file = debugfs_create_file("reset_wpf0", 0444, 495 vsp1->dbgroot, 496 vsp1, 497 &vsp1_debugfs_reset_wpf_fops); 498 499 debugfs_create_regset32("regs", 0444, vsp1->dbgroot, &vsp1->regset); 500 501 return 0; 502 } 503 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org