tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 commit: fb43aa0acdfd600c75b8c877bdf9f6e9893ffc9b drm: bridge: Add support for Cadence MHDP8546 DPI/DP bridge date: 5 months ago config: powerpc-randconfig-r026-20210228 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e0b1df924ae06d6d88582334087d2eacc6702e8f) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb43aa0acdfd600c75b8c877bdf9f6e9893ffc9b git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fb43aa0acdfd600c75b8c877bdf9f6e9893ffc9b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:43:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insb, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:95:1: note: expanded from here __do_insb ^ arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:97:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:99:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:101:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:103:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:26: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:105:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:1403:12: warning: stack >> frame size of 1088 bytes in function 'cdns_mhdp_link_up' >> [-Wframe-larger-than=] static int cdns_mhdp_link_up(struct cdns_mhdp_device *mhdp) ^ 7 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE Selected by - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP vim +/cdns_mhdp_link_up +1403 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c 1402 > 1403 static int cdns_mhdp_link_up(struct cdns_mhdp_device *mhdp) 1404 { 1405 u8 dpcd[DP_RECEIVER_CAP_SIZE], amp[2]; 1406 u32 resp, interval, interval_us; 1407 u8 ext_cap_chk = 0; 1408 unsigned int addr; 1409 int err; 1410 1411 WARN_ON(!mutex_is_locked(&mhdp->link_mutex)); 1412 1413 drm_dp_dpcd_readb(&mhdp->aux, DP_TRAINING_AUX_RD_INTERVAL, 1414 &ext_cap_chk); 1415 1416 if (ext_cap_chk & DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT) 1417 addr = DP_DP13_DPCD_REV; 1418 else 1419 addr = DP_DPCD_REV; 1420 1421 err = drm_dp_dpcd_read(&mhdp->aux, addr, dpcd, DP_RECEIVER_CAP_SIZE); 1422 if (err < 0) { 1423 dev_err(mhdp->dev, "Failed to read receiver capabilities\n"); 1424 return err; 1425 } 1426 1427 mhdp->link.revision = dpcd[0]; 1428 mhdp->link.rate = drm_dp_bw_code_to_link_rate(dpcd[1]); 1429 mhdp->link.num_lanes = dpcd[2] & DP_MAX_LANE_COUNT_MASK; 1430 1431 if (dpcd[2] & DP_ENHANCED_FRAME_CAP) 1432 mhdp->link.capabilities |= DP_LINK_CAP_ENHANCED_FRAMING; 1433 1434 dev_dbg(mhdp->dev, "Set sink device power state via DPCD\n"); 1435 cdns_mhdp_link_power_up(&mhdp->aux, &mhdp->link); 1436 1437 cdns_mhdp_fill_sink_caps(mhdp, dpcd); 1438 1439 mhdp->link.rate = cdns_mhdp_max_link_rate(mhdp); 1440 mhdp->link.num_lanes = cdns_mhdp_max_num_lanes(mhdp); 1441 1442 /* Disable framer for link training */ 1443 err = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); 1444 if (err < 0) { 1445 dev_err(mhdp->dev, 1446 "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n", 1447 err); 1448 return err; 1449 } 1450 1451 resp &= ~CDNS_DP_FRAMER_EN; 1452 cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp); 1453 1454 /* Spread AMP if required, enable 8b/10b coding */ 1455 amp[0] = cdns_mhdp_get_ssc_supported(mhdp) ? DP_SPREAD_AMP_0_5 : 0; 1456 amp[1] = DP_SET_ANSI_8B10B; 1457 drm_dp_dpcd_write(&mhdp->aux, DP_DOWNSPREAD_CTRL, amp, 2); 1458 1459 if (mhdp->host.fast_link & mhdp->sink.fast_link) { 1460 dev_err(mhdp->dev, "fastlink not supported\n"); 1461 return -EOPNOTSUPP; 1462 } 1463 1464 interval = dpcd[DP_TRAINING_AUX_RD_INTERVAL] & DP_TRAINING_AUX_RD_MASK; 1465 interval_us = cdns_mhdp_get_training_interval_us(mhdp, interval); 1466 if (!interval_us || 1467 cdns_mhdp_link_training(mhdp, interval_us)) { 1468 dev_err(mhdp->dev, "Link training failed. Exiting.\n"); 1469 return -EIO; 1470 } 1471 1472 mhdp->link_up = true; 1473 1474 return 0; 1475 } 1476 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
