Hi AngeloGioacchino, kernel test robot noticed the following build errors: [auto build test ERROR on drm-misc/drm-misc-next] [also build test ERROR on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.7-rc6 next-20231222] [cannot apply to drm-intel/for-linux-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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/AngeloGioacchino-Del-Regno/drm-mediatek-dsi-Use-GENMASK-for-register-mask-definitions/20231222-164513 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20231220135722.192080-4-angelogioacchino.delregno%40collabora.com patch subject: [PATCH v2 3/4] drm/mediatek: dsi: Use bitfield macros where useful config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20231223/202312231512.ioiD48LA-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231223/202312231512.ioiD48LA-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312231512.ioiD48LA-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): drivers/gpu/drm/mediatek/mtk_dsi.c: In function 'mtk_dsi_phy_timconfig': >> drivers/gpu/drm/mediatek/mtk_dsi.c:260:19: error: implicit declaration of function 'FIELD_PREP' [-Werror=implicit-function-declaration] 260 | timcon0 = FIELD_PREP(LPX, timing->lpx) | | ^~~~~~~~~~ cc1: some warnings being treated as errors vim +/FIELD_PREP +260 drivers/gpu/drm/mediatek/mtk_dsi.c 236 237 static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi) 238 { 239 u32 timcon0, timcon1, timcon2, timcon3; 240 u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000); 241 struct mtk_phy_timing *timing = &dsi->phy_timing; 242 243 timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1; 244 timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000; 245 timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 - 246 timing->da_hs_prepare; 247 timing->da_hs_trail = timing->da_hs_prepare + 1; 248 249 timing->ta_go = 4 * timing->lpx - 2; 250 timing->ta_sure = timing->lpx + 2; 251 timing->ta_get = 4 * timing->lpx; 252 timing->da_hs_exit = 2 * timing->lpx + 1; 253 254 timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000); 255 timing->clk_hs_post = timing->clk_hs_prepare + 8; 256 timing->clk_hs_trail = timing->clk_hs_prepare; 257 timing->clk_hs_zero = timing->clk_hs_trail * 4; 258 timing->clk_hs_exit = 2 * timing->clk_hs_trail; 259 > 260 timcon0 = FIELD_PREP(LPX, timing->lpx) | 261 FIELD_PREP(HS_PREP, timing->da_hs_prepare) | 262 FIELD_PREP(HS_ZERO, timing->da_hs_zero) | 263 FIELD_PREP(HS_TRAIL, timing->da_hs_trail); 264 265 timcon1 = FIELD_PREP(TA_GO, timing->ta_go) | 266 FIELD_PREP(TA_SURE, timing->ta_sure) | 267 FIELD_PREP(TA_GET, timing->ta_get) | 268 FIELD_PREP(DA_HS_EXIT, timing->da_hs_exit); 269 270 timcon2 = FIELD_PREP(DA_HS_SYNC, 1) | 271 FIELD_PREP(CLK_ZERO, timing->clk_hs_zero) | 272 FIELD_PREP(CLK_TRAIL, timing->clk_hs_trail); 273 274 timcon3 = FIELD_PREP(CLK_HS_PREP, timing->clk_hs_prepare) | 275 FIELD_PREP(CLK_HS_POST, timing->clk_hs_post) | 276 FIELD_PREP(CLK_HS_EXIT, timing->clk_hs_exit); 277 278 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0); 279 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1); 280 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2); 281 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3); 282 } 283 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
