Hi Animesh, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on next-20211008] [cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master airlied/drm-next v5.15-rc4] [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/Animesh-Manna/Panel-replay-phase1-implementation/20211010-203447 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: i386-randconfig-a014-20211010 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 903b30fea21f99d8f48fde4defcc838970e30ee1) 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://github.com/0day-ci/linux/commit/474a8190321f2836a1fe989326736d19dc9a732b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Animesh-Manna/Panel-replay-phase1-implementation/20211010-203447 git checkout 474a8190321f2836a1fe989326736d19dc9a732b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 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/i915/display/intel_dp.c:2780:27: warning: overlapping comparisons always evaluate to true [-Wtautological-overlap-compare] if (vsc->revision != 0x5 || vsc->revision != 0x7) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +2780 drivers/gpu/drm/i915/display/intel_dp.c 2756 2757 static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc, 2758 struct dp_sdp *sdp, size_t size) 2759 { 2760 size_t length = sizeof(struct dp_sdp); 2761 2762 if (size < length) 2763 return -ENOSPC; 2764 2765 memset(sdp, 0, size); 2766 2767 /* 2768 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119 2769 * VSC SDP Header Bytes 2770 */ 2771 sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */ 2772 sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */ 2773 sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */ 2774 sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */ 2775 2776 /* 2777 * Revision 0x5 and 0x7 supports Pixel Encoding/Colorimetry Format as 2778 * per DP 1.4a spec and DP 2.0 spec respectively. 2779 */ > 2780 if (vsc->revision != 0x5 || vsc->revision != 0x7) 2781 goto out; 2782 2783 /* VSC SDP Payload for DB16 through DB18 */ 2784 /* Pixel Encoding and Colorimetry Formats */ 2785 sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */ 2786 sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */ 2787 2788 switch (vsc->bpc) { 2789 case 6: 2790 /* 6bpc: 0x0 */ 2791 break; 2792 case 8: 2793 sdp->db[17] = 0x1; /* DB17[3:0] */ 2794 break; 2795 case 10: 2796 sdp->db[17] = 0x2; 2797 break; 2798 case 12: 2799 sdp->db[17] = 0x3; 2800 break; 2801 case 16: 2802 sdp->db[17] = 0x4; 2803 break; 2804 default: 2805 MISSING_CASE(vsc->bpc); 2806 break; 2807 } 2808 /* Dynamic Range and Component Bit Depth */ 2809 if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA) 2810 sdp->db[17] |= 0x80; /* DB17[7] */ 2811 2812 /* Content Type */ 2813 sdp->db[18] = vsc->content_type & 0x7; 2814 2815 out: 2816 return length; 2817 } 2818 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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