Hi Swapnil, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linus/master v5.8-rc6 next-20200721] [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] url: https://github.com/0day-ci/linux/commits/Swapnil-Jakhade/drm-Add-support-for-Cadence-MHDP-DPI-DP-bridge-and-J721E-wrapper/20200722-154322 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: x86_64-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_fw_activate': >> drivers/gpu/drm/bridge/cdns-mhdp-core.c:765:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow] 765 | writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, In file included from include/linux/bits.h:23, from include/linux/bitops.h:5, from include/linux/kernel.h:12, from include/linux/clk.h:13, from drivers/gpu/drm/bridge/cdns-mhdp-core.c:10: drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_link_training_init': include/linux/bits.h:26:28: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] 26 | __builtin_constant_p((l) > (h)), (l) > (h), 0))) | ^ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK' 39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) | ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.h:116:35: note: in expansion of macro 'GENMASK' 116 | #define CDNS_DP_LANE_EN_LANES(x) GENMASK((x) - 1, 0) | ^~~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.c:888:8: note: in expansion of macro 'CDNS_DP_LANE_EN_LANES' 888 | CDNS_DP_LANE_EN_LANES(mhdp->link.num_lanes)); | ^~~~~~~~~~~~~~~~~~~~~ include/linux/bits.h:26:40: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] 26 | __builtin_constant_p((l) > (h)), (l) > (h), 0))) | ^ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK' 39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) | ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.h:116:35: note: in expansion of macro 'GENMASK' 116 | #define CDNS_DP_LANE_EN_LANES(x) GENMASK((x) - 1, 0) | ^~~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.c:888:8: note: in expansion of macro 'CDNS_DP_LANE_EN_LANES' 888 | CDNS_DP_LANE_EN_LANES(mhdp->link.num_lanes)); | ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_fill_host_caps': drivers/gpu/drm/bridge/cdns-mhdp-core.c:1378:2: error: implicit declaration of function 'phy_get_attrs'; did you mean 'vfs_getattr'? [-Werror=implicit-function-declaration] 1378 | phy_get_attrs(mhdp->phy, &attrs); | ^~~~~~~~~~~~~ | vfs_getattr drivers/gpu/drm/bridge/cdns-mhdp-core.c:1384:19: error: 'struct phy_attrs' has no member named 'max_link_rate' 1384 | link_rate = attrs.max_link_rate; | ^ drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_attach': drivers/gpu/drm/bridge/cdns-mhdp-core.c:1709:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow] 1709 | writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_validate_mode_params': drivers/gpu/drm/bridge/cdns-mhdp-core.c:2077:16: warning: variable 'pxlfmt' set but not used [-Wunused-but-set-variable] 2077 | u32 bpp, bpc, pxlfmt; | ^~~~~~ drivers/gpu/drm/bridge/cdns-mhdp-core.c:2077:11: warning: variable 'bpc' set but not used [-Wunused-but-set-variable] 2077 | u32 bpp, bpc, pxlfmt; | ^~~ drivers/gpu/drm/bridge/cdns-mhdp-core.c: In function 'cdns_mhdp_irq_handler': drivers/gpu/drm/bridge/cdns-mhdp-core.c:2285:6: warning: variable 'apb_stat' set but not used [-Wunused-but-set-variable] 2285 | u32 apb_stat, sw_ev0; | ^~~~~~~~ cc1: some warnings being treated as errors vim +765 drivers/gpu/drm/bridge/cdns-mhdp-core.c 686 687 static int cdns_mhdp_fw_activate(const struct firmware *fw, 688 struct cdns_mhdp_device *mhdp) 689 { 690 unsigned int reg; 691 int ret = 0; 692 693 dev_dbg(mhdp->dev, "%s\n", __func__); 694 695 if (!fw || !fw->data) { 696 dev_err(mhdp->dev, "%s: No firmware.\n", __func__); 697 return -EINVAL; 698 } 699 700 spin_lock(&mhdp->start_lock); 701 if (mhdp->hw_state != MHDP_HW_INACTIVE) { 702 spin_unlock(&mhdp->start_lock); 703 if (mhdp->hw_state != MHDP_HW_STOPPED) 704 dev_err(mhdp->dev, "%s: Bad HW state: %d\n", 705 __func__, mhdp->hw_state); 706 return -EBUSY; 707 } 708 mhdp->hw_state = MHDP_HW_LOADING; 709 spin_unlock(&mhdp->start_lock); 710 711 /* Release uCPU reset and stall it. */ 712 writel(CDNS_CPU_STALL, mhdp->regs + CDNS_APB_CTRL); 713 714 memcpy_toio(mhdp->regs + CDNS_MHDP_IMEM, fw->data, fw->size); 715 716 /* Leave debug mode, release stall */ 717 writel(0, mhdp->regs + CDNS_APB_CTRL); 718 719 /* 720 * Wait for the KEEP_ALIVE "message" on the first 8 bits. 721 * Updated each sched "tick" (~2ms) 722 */ 723 ret = readl_poll_timeout(mhdp->regs + CDNS_KEEP_ALIVE, reg, 724 reg & CDNS_KEEP_ALIVE_MASK, 500, 725 CDNS_KEEP_ALIVE_TIMEOUT); 726 if (ret) { 727 dev_err(mhdp->dev, 728 "device didn't give any life sign: reg %d\n", reg); 729 goto error; 730 } 731 732 ret = cdns_mhdp_check_fw_version(mhdp); 733 if (ret) 734 goto error; 735 736 /* Init events to 0 as it's not cleared by FW at boot but on read */ 737 readl(mhdp->regs + CDNS_SW_EVENT0); 738 readl(mhdp->regs + CDNS_SW_EVENT1); 739 readl(mhdp->regs + CDNS_SW_EVENT2); 740 readl(mhdp->regs + CDNS_SW_EVENT3); 741 742 /* Activate uCPU */ 743 ret = cdns_mhdp_set_firmware_active(mhdp, true); 744 if (ret) { 745 dev_err(mhdp->dev, "%s: Failed to activate FW: %d\n", 746 __func__, ret); 747 goto error; 748 } 749 750 spin_lock(&mhdp->start_lock); 751 752 mhdp->hw_state = MHDP_HW_READY; 753 wake_up(&fw_load_wq); 754 /* 755 * Here we must keep the lock while enabling the interrupts 756 * since it would otherwise be possible that interrupt enable 757 * code is executed after the bridge is detached. The similar 758 * situation is not possible in attach()/detach() callbacks 759 * since the hw_state changes from MHDP_HW_READY to 760 * MHDP_HW_STOPPED happens only due to driver removal when 761 * bridge should already be detached. 762 */ 763 if (mhdp->bridge_attached) 764 /* enable SW event interrupts */ > 765 writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, 766 mhdp->regs + CDNS_APB_INT_MASK); 767 768 spin_unlock(&mhdp->start_lock); 769 770 dev_dbg(mhdp->dev, "DP FW activated\n"); 771 772 return 0; 773 error: 774 spin_lock(&mhdp->start_lock); 775 mhdp->hw_state = MHDP_HW_INACTIVE; 776 spin_unlock(&mhdp->start_lock); 777 778 return ret; 779 } 780 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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