Hi Swapnil, Thank you for the patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on linus/master v5.9-rc7] [cannot apply to next-20200930] [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-... base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/f4ffd924c54d5cb905f14161decf21a54... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Swapnil-Jakhade/drm-Add-support-for-Cadence-MHDP8546-DPI-DP-bridge-and-J721E-wrapper/20200918-201040 git checkout f4ffd924c54d5cb905f14161decf21a549d87615 # 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(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c: In function 'cdns_mhdp_fw_activate': drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:749:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow] 749 | writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c: In function 'cdns_mhdp_fill_host_caps': 1359 | link_rate = mhdp->phy->attrs.max_link_rate; | ^ drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c: In function 'cdns_mhdp_attach': drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:1690:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow] 1690 | writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c: In function 'cdns_mhdp_bridge_hpd_enable': drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:2123:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow] 2123 | writel(~CDNS_APB_INT_MASK_SW_EVENT_INT, vim +1359 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c 1348 1349 static void cdns_mhdp_fill_host_caps(struct cdns_mhdp_device *mhdp) 1350 { 1351 unsigned int link_rate; 1352 1353 /* Get source capabilities based on PHY attributes */ 1354 1355 mhdp->host.lanes_cnt = mhdp->phy->attrs.bus_width; 1356 if (!mhdp->host.lanes_cnt) 1357 mhdp->host.lanes_cnt = 4; 1358 1360 if (!link_rate) 1361 link_rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_8_1); 1362 else 1363 /* PHY uses Mb/s, DRM uses tens of kb/s. */ 1364 link_rate *= 100; 1365 1366 mhdp->host.link_rate = link_rate; 1367 mhdp->host.volt_swing = CDNS_VOLT_SWING(3); 1368 mhdp->host.pre_emphasis = CDNS_PRE_EMPHASIS(3); 1369 mhdp->host.pattern_supp = CDNS_SUPPORT_TPS(1) | 1370 CDNS_SUPPORT_TPS(2) | CDNS_SUPPORT_TPS(3) | 1371 CDNS_SUPPORT_TPS(4); 1372 mhdp->host.lane_mapping = CDNS_LANE_MAPPING_NORMAL; 1373 mhdp->host.fast_link = false; 1374 mhdp->host.enhanced = true; 1375 mhdp->host.scrambler = true; 1376 mhdp->host.ssc = false; 1377 } 1378 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org