Hi Marek, I love your patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-intel/for-linux-next drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next v5.17 next-20220328] [cannot apply to airlied/drm-next] [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/intel-lab-lkp/linux/commits/Marek-Vasut/drm-bridge-tc358767-Add-DSI-to-DPI-mode-support/20220329-054627 base: git://anongit.freedesktop.org/drm/drm drm-next config: hexagon-randconfig-r045-20220327 (https://download.01.org/0day-ci/archive/20220329/202203290924.MYL8dU7I-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d) 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/intel-lab-lkp/linux/commit/294c331d772539772ae87613ae1990860bbbc6ff git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Marek-Vasut/drm-bridge-tc358767-Add-DSI-to-DPI-mode-support/20220329-054627 git checkout 294c331d772539772ae87613ae1990860bbbc6ff # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/bridge/ 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/tc358767.c:741:6: warning: variable 'max_tu_symbol' set but not used [-Wunused-but-set-variable] int max_tu_symbol; ^ 1 warning generated. vim +/max_tu_symbol +741 drivers/gpu/drm/bridge/tc358767.c 7caff0fc4296eb Andrey Gusakov 2016-07-13 736 294c331d772539 Marek Vasut 2022-03-28 737 static int tc_set_common_video_mode(struct tc_data *tc, 63f8f3badf799c Laurent Pinchart 2018-04-06 738 const struct drm_display_mode *mode) 7caff0fc4296eb Andrey Gusakov 2016-07-13 739 { 7caff0fc4296eb Andrey Gusakov 2016-07-13 740 int ret; 7caff0fc4296eb Andrey Gusakov 2016-07-13 @741 int max_tu_symbol; 7caff0fc4296eb Andrey Gusakov 2016-07-13 742 7caff0fc4296eb Andrey Gusakov 2016-07-13 743 int left_margin = mode->htotal - mode->hsync_end; 7caff0fc4296eb Andrey Gusakov 2016-07-13 744 int right_margin = mode->hsync_start - mode->hdisplay; 7caff0fc4296eb Andrey Gusakov 2016-07-13 745 int hsync_len = mode->hsync_end - mode->hsync_start; 7caff0fc4296eb Andrey Gusakov 2016-07-13 746 int upper_margin = mode->vtotal - mode->vsync_end; 7caff0fc4296eb Andrey Gusakov 2016-07-13 747 int lower_margin = mode->vsync_start - mode->vdisplay; 7caff0fc4296eb Andrey Gusakov 2016-07-13 748 int vsync_len = mode->vsync_end - mode->vsync_start; fd70c7755bf017 Tomi Valkeinen 2019-09-24 749 u32 bits_per_pixel = 24; fd70c7755bf017 Tomi Valkeinen 2019-09-24 750 u32 in_bw, out_bw; 7caff0fc4296eb Andrey Gusakov 2016-07-13 751 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 752 /* 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 753 * Recommended maximum number of symbols transferred in a transfer unit: 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 754 * DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size, 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 755 * (output active video bandwidth in bytes)) 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 756 * Must be less than tu_size. 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 757 */ fd70c7755bf017 Tomi Valkeinen 2019-09-24 758 fd70c7755bf017 Tomi Valkeinen 2019-09-24 759 in_bw = mode->clock * bits_per_pixel / 8; e7dc8d40eea400 Thierry Reding 2019-10-21 760 out_bw = tc->link.num_lanes * tc->link.rate; fd70c7755bf017 Tomi Valkeinen 2019-09-24 761 max_tu_symbol = DIV_ROUND_UP(in_bw * TU_SIZE_RECOMMENDED, out_bw); 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 762 7caff0fc4296eb Andrey Gusakov 2016-07-13 763 dev_dbg(tc->dev, "set mode %dx%d\n", 7caff0fc4296eb Andrey Gusakov 2016-07-13 764 mode->hdisplay, mode->vdisplay); 7caff0fc4296eb Andrey Gusakov 2016-07-13 765 dev_dbg(tc->dev, "H margin %d,%d sync %d\n", 7caff0fc4296eb Andrey Gusakov 2016-07-13 766 left_margin, right_margin, hsync_len); 7caff0fc4296eb Andrey Gusakov 2016-07-13 767 dev_dbg(tc->dev, "V margin %d,%d sync %d\n", 7caff0fc4296eb Andrey Gusakov 2016-07-13 768 upper_margin, lower_margin, vsync_len); 7caff0fc4296eb Andrey Gusakov 2016-07-13 769 dev_dbg(tc->dev, "total: %dx%d\n", mode->htotal, mode->vtotal); 7caff0fc4296eb Andrey Gusakov 2016-07-13 770 7caff0fc4296eb Andrey Gusakov 2016-07-13 771 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 772 /* 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 773 * LCD Ctl Frame Size 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 774 * datasheet is not clear of vsdelay in case of DPI 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 775 * assume we do not need any delay when DPI is a source of 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 776 * sync signals 66d1c3b94d5d59 Andrey Gusakov 2017-11-07 777 */ 6d0c38315915d4 Andrey Smirnov 2019-06-18 778 ret = regmap_write(tc->regmap, VPCTRL0, 3f072c304c0a7e Andrey Smirnov 2019-06-18 779 FIELD_PREP(VSDELAY, 0) | 7caff0fc4296eb Andrey Gusakov 2016-07-13 780 OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED); 6d0c38315915d4 Andrey Smirnov 2019-06-18 781 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 782 return ret; 6d0c38315915d4 Andrey Smirnov 2019-06-18 783 6d0c38315915d4 Andrey Smirnov 2019-06-18 784 ret = regmap_write(tc->regmap, HTIM01, 3f072c304c0a7e Andrey Smirnov 2019-06-18 785 FIELD_PREP(HBPR, ALIGN(left_margin, 2)) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 786 FIELD_PREP(HPW, ALIGN(hsync_len, 2))); 6d0c38315915d4 Andrey Smirnov 2019-06-18 787 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 788 return ret; 6d0c38315915d4 Andrey Smirnov 2019-06-18 789 6d0c38315915d4 Andrey Smirnov 2019-06-18 790 ret = regmap_write(tc->regmap, HTIM02, 3f072c304c0a7e Andrey Smirnov 2019-06-18 791 FIELD_PREP(HDISPR, ALIGN(mode->hdisplay, 2)) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 792 FIELD_PREP(HFPR, ALIGN(right_margin, 2))); 6d0c38315915d4 Andrey Smirnov 2019-06-18 793 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 794 return ret; 6d0c38315915d4 Andrey Smirnov 2019-06-18 795 6d0c38315915d4 Andrey Smirnov 2019-06-18 796 ret = regmap_write(tc->regmap, VTIM01, 3f072c304c0a7e Andrey Smirnov 2019-06-18 797 FIELD_PREP(VBPR, upper_margin) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 798 FIELD_PREP(VSPR, vsync_len)); 6d0c38315915d4 Andrey Smirnov 2019-06-18 799 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 800 return ret; 6d0c38315915d4 Andrey Smirnov 2019-06-18 801 6d0c38315915d4 Andrey Smirnov 2019-06-18 802 ret = regmap_write(tc->regmap, VTIM02, 3f072c304c0a7e Andrey Smirnov 2019-06-18 803 FIELD_PREP(VFPR, lower_margin) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 804 FIELD_PREP(VDISPR, mode->vdisplay)); 6d0c38315915d4 Andrey Smirnov 2019-06-18 805 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 806 return ret; 6d0c38315915d4 Andrey Smirnov 2019-06-18 807 6d0c38315915d4 Andrey Smirnov 2019-06-18 808 ret = regmap_write(tc->regmap, VFUEN0, VFUEN); /* update settings */ 6d0c38315915d4 Andrey Smirnov 2019-06-18 809 if (ret) 6d0c38315915d4 Andrey Smirnov 2019-06-18 810 return ret; 7caff0fc4296eb Andrey Gusakov 2016-07-13 811 7caff0fc4296eb Andrey Gusakov 2016-07-13 812 /* Test pattern settings */ 6d0c38315915d4 Andrey Smirnov 2019-06-18 813 ret = regmap_write(tc->regmap, TSTCTL, 3f072c304c0a7e Andrey Smirnov 2019-06-18 814 FIELD_PREP(COLOR_R, 120) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 815 FIELD_PREP(COLOR_G, 20) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 816 FIELD_PREP(COLOR_B, 99) | 3f072c304c0a7e Andrey Smirnov 2019-06-18 817 ENI2CFILTER | 3f072c304c0a7e Andrey Smirnov 2019-06-18 818 FIELD_PREP(COLOR_BAR_MODE, COLOR_BAR_MODE_BARS)); 294c331d772539 Marek Vasut 2022-03-28 819 6d0c38315915d4 Andrey Smirnov 2019-06-18 820 return ret; 294c331d772539 Marek Vasut 2022-03-28 821 } 294c331d772539 Marek Vasut 2022-03-28 822 -- 0-DAY CI Kernel Test Service https://01.org/lkp
